
# Apache Arrow 6.0.1 (2021-11-10)

## Bug Fixes

* [ARROW-14437](https://issues.apache.org/jira/browse/ARROW-14437) - [Python] CSV test\_cancellation unittests fail on Apple M1
* [ARROW-14492](https://issues.apache.org/jira/browse/ARROW-14492) - [JS] Browser bundles broken
* [ARROW-14513](https://issues.apache.org/jira/browse/ARROW-14513) - [Release][Go] Update release-6.0.0 with /v6 suffix
* [ARROW-14519](https://issues.apache.org/jira/browse/ARROW-14519) - [C++] joins segfault when data contains list column
* [ARROW-14523](https://issues.apache.org/jira/browse/ARROW-14523) - [C++][Python] S3FileSystem write\_table can lose data
* [ARROW-14538](https://issues.apache.org/jira/browse/ARROW-14538) - [R] Work around empty tr call on Solaris
* [ARROW-14550](https://issues.apache.org/jira/browse/ARROW-14550) - [C++][Go] the json license is not compatible with FSF standards
* [ARROW-14583](https://issues.apache.org/jira/browse/ARROW-14583) - [R][C++] Crash when summarizing after filtering to no rows on partitioned data
* [ARROW-14584](https://issues.apache.org/jira/browse/ARROW-14584) - [Python][CI] Python sdist installation fails with latest setuptools 58.5
* [ARROW-14620](https://issues.apache.org/jira/browse/ARROW-14620) - [Python] Missing bindings for existing\_data\_behavior makes it impossible to maintain old behavior
* [ARROW-14630](https://issues.apache.org/jira/browse/ARROW-14630) - [C++] DCHECK in GroupByNode when error encountered


## New Features and Improvements

* [ARROW-13156](https://issues.apache.org/jira/browse/ARROW-13156) - [R] bindings for str\_count
* [ARROW-14181](https://issues.apache.org/jira/browse/ARROW-14181) - [C++][Compute] Hash Join support for dictionary	
* [ARROW-14189](https://issues.apache.org/jira/browse/ARROW-14189) - [Docs] Add version dropdown to the sphinx docs
* [ARROW-14310](https://issues.apache.org/jira/browse/ARROW-14310) - [R] Make expect\_dplyr\_equal() more intuitive
* [ARROW-14365](https://issues.apache.org/jira/browse/ARROW-14365) - [R] Update README example to reflect new capabilities
* [ARROW-14390](https://issues.apache.org/jira/browse/ARROW-14390) - [Packaging][Ubuntu] Add support for Ubuntu 21.10
* [ARROW-14433](https://issues.apache.org/jira/browse/ARROW-14433) - [Release][APT] Skip arm64 Ubuntu 21.04 verification
* [ARROW-14450](https://issues.apache.org/jira/browse/ARROW-14450) - [R] Old macos build error
* [ARROW-14459](https://issues.apache.org/jira/browse/ARROW-14459) - [Doc] Update the pinned sphinx version
* [ARROW-14480](https://issues.apache.org/jira/browse/ARROW-14480) - [R] Expose arrow::dataset::ExistingDataBehavior to R
* [ARROW-14486](https://issues.apache.org/jira/browse/ARROW-14486) - [Packaging][deb] libthrift-dev dependency is missing
* [ARROW-14490](https://issues.apache.org/jira/browse/ARROW-14490) - [Doc] Regenerate CHANGELOG.md to include all versions
* [ARROW-14496](https://issues.apache.org/jira/browse/ARROW-14496) - [Docs] Ensure links to non-sphinx parts of the docs are relative instead of absolute
* [ARROW-14499](https://issues.apache.org/jira/browse/ARROW-14499) - [Docs] Version dropdown side-by-side with search box
* [ARROW-14514](https://issues.apache.org/jira/browse/ARROW-14514) - [C++][R] UBSAN error on round kernel
* [ARROW-14580](https://issues.apache.org/jira/browse/ARROW-14580) - [Python] PyPI listing does not include trove classifiers for Python 3.10
* [ARROW-14623](https://issues.apache.org/jira/browse/ARROW-14623) - [Packaging][Java] Upload not only .jar but also .pom
* [ARROW-14628](https://issues.apache.org/jira/browse/ARROW-14628) - [Release][Python] Use python -m pytest



# Apache Arrow 6.0.0 (2021-10-26)

## Bug Fixes

* [ARROW-6946](https://issues.apache.org/jira/browse/ARROW-6946) - [Go] Run tests with assert build tag enabled
* [ARROW-8452](https://issues.apache.org/jira/browse/ARROW-8452) - [Go][Integration] Go JSON producer generates incorrect nullable flag for nested types
* [ARROW-8453](https://issues.apache.org/jira/browse/ARROW-8453) - [Integration][Go] Recursive nested types unsupported
* [ARROW-8999](https://issues.apache.org/jira/browse/ARROW-8999) - [Python][C++] Non-deterministic segfault in "AMD64 MacOS 10.15 Python 3.7" build
* [ARROW-9948](https://issues.apache.org/jira/browse/ARROW-9948) - [C++] Decimal128 does not check scale range when rescaling; can cause buffer overflow
* [ARROW-10213](https://issues.apache.org/jira/browse/ARROW-10213) - [C++] Temporal cast from timestamp to date rounds instead of extracting date component
* [ARROW-10373](https://issues.apache.org/jira/browse/ARROW-10373) - [C++] ValidateFull() does not validate null\_count
* [ARROW-10773](https://issues.apache.org/jira/browse/ARROW-10773) - [R] parallel as.data.frame.Table hangs indefinitely on Windows
* [ARROW-11518](https://issues.apache.org/jira/browse/ARROW-11518) - [C++] [Parquet] Parquet reader crashes when reading boolean columns
* [ARROW-11579](https://issues.apache.org/jira/browse/ARROW-11579) - [R] read\_feather hanging on Windows
* [ARROW-11634](https://issues.apache.org/jira/browse/ARROW-11634) - [C++][Parquet] Parquet statistics (min/max) for dictionary columns are incorrect
* [ARROW-11729](https://issues.apache.org/jira/browse/ARROW-11729) - [R] Add examples to the datasets documentation
* [ARROW-12011](https://issues.apache.org/jira/browse/ARROW-12011) - [C++][Python] Crashes and incorrect results when converting large integers to dates
* [ARROW-12072](https://issues.apache.org/jira/browse/ARROW-12072) - (ipc.Writer).Write panics with \`arrow/array: index out of range\`
* [ARROW-12087](https://issues.apache.org/jira/browse/ARROW-12087) - [C++] Fix sort\_indices, array\_sort\_indices timestamp support discrepancy
* [ARROW-12513](https://issues.apache.org/jira/browse/ARROW-12513) - [C++][Parquet] Parquet Writer always puts null\_count=0 in Parquet statistics for dictionary-encoded array with nulls
* [ARROW-12540](https://issues.apache.org/jira/browse/ARROW-12540) - [C++] Implement cast from date32[day] to utf8
* [ARROW-12636](https://issues.apache.org/jira/browse/ARROW-12636) - [JS] ESM Tree-Shaking produces broken code
* [ARROW-12700](https://issues.apache.org/jira/browse/ARROW-12700) - [R] Read/Write\_feather stuck forever after bad write, R, Win32
* [ARROW-12837](https://issues.apache.org/jira/browse/ARROW-12837) - [C++] Array::ToString() segfaults with null buffer.
* [ARROW-13134](https://issues.apache.org/jira/browse/ARROW-13134) - [C++] SSL-related arrow-s3fs-test failures with aws-sdk-cpp 1.9.51
* [ARROW-13151](https://issues.apache.org/jira/browse/ARROW-13151) - [Python] Unable to read single child field of struct column from Parquet
* [ARROW-13198](https://issues.apache.org/jira/browse/ARROW-13198) - [C++][Dataset] Async scanner occasionally segfaulting in CI
* [ARROW-13293](https://issues.apache.org/jira/browse/ARROW-13293) - [R] open\_dataset followed by collect hangs (while compute works)
* [ARROW-13304](https://issues.apache.org/jira/browse/ARROW-13304) - [C++] Unable to install nightly on Ubuntu 21.04 due to day of week options
* [ARROW-13336](https://issues.apache.org/jira/browse/ARROW-13336) - [Doc][Python] make clean doesn't clean up "generated" documentation
* [ARROW-13422](https://issues.apache.org/jira/browse/ARROW-13422) - [R] Clarify README about S3 support on Windows
* [ARROW-13424](https://issues.apache.org/jira/browse/ARROW-13424) - [C++] conda-forge benchmark library rejected
* [ARROW-13425](https://issues.apache.org/jira/browse/ARROW-13425) - [Dev][Archery] Archery import pandas which imports pyarrow
* [ARROW-13429](https://issues.apache.org/jira/browse/ARROW-13429) - [C++][Gandiva] Gandiva crashes when compiling If-else expression with binary type
* [ARROW-13430](https://issues.apache.org/jira/browse/ARROW-13430) - [Integration][Go] Various errors in the integration tests
* [ARROW-13436](https://issues.apache.org/jira/browse/ARROW-13436) - [Python][Doc] Clarify what should be expected if read\_table is passed an empty list of columns
* [ARROW-13437](https://issues.apache.org/jira/browse/ARROW-13437) - [C++] Slice of FixedSizeList fails ValidateFull
* [ARROW-13441](https://issues.apache.org/jira/browse/ARROW-13441) - [CSV] Streaming reader conversion should skip empty blocks
* [ARROW-13443](https://issues.apache.org/jira/browse/ARROW-13443) - [C++] Fix the incorrect mapping from flatbuf::MetadataVersion to arrow::ipc::MetadataVersion
* [ARROW-13445](https://issues.apache.org/jira/browse/ARROW-13445) - [Java][Packaging] Fix artifact patterns for the Java jars
* [ARROW-13446](https://issues.apache.org/jira/browse/ARROW-13446) - [Release] Fix verification on amazon linux
* [ARROW-13447](https://issues.apache.org/jira/browse/ARROW-13447) - [Release] Verification script for arm64 and universal2 macOS wheels
* [ARROW-13450](https://issues.apache.org/jira/browse/ARROW-13450) - [Python][Packaging] Set deployment target to 10.13 for universal2 wheels
* [ARROW-13469](https://issues.apache.org/jira/browse/ARROW-13469) - [C++] Suppress -Wmissing-field-initializers in DayMilliseconds arrow/type.h
* [ARROW-13474](https://issues.apache.org/jira/browse/ARROW-13474) - [C++][Python] PyArrow crash when filter/take empty Extension array
* [ARROW-13477](https://issues.apache.org/jira/browse/ARROW-13477) - [Release] Pass ARTIFACTORY\_API\_KEY to the upload script
* [ARROW-13484](https://issues.apache.org/jira/browse/ARROW-13484) - [Release] Packages not available for Amazon Linux 2
* [ARROW-13490](https://issues.apache.org/jira/browse/ARROW-13490) - [R] [CI] Need to gate duckdb examples on duckdb version
* [ARROW-13492](https://issues.apache.org/jira/browse/ARROW-13492) - [R] [CI] Move r tools 35 build back to per-commit/pre-PR
* [ARROW-13493](https://issues.apache.org/jira/browse/ARROW-13493) - [C++] Anonymous structs in an anonymous union are a GNU extension
* [ARROW-13495](https://issues.apache.org/jira/browse/ARROW-13495) - [C++] UBSAN error in BitUtil when writing dataset
* [ARROW-13496](https://issues.apache.org/jira/browse/ARROW-13496) - [CI][R] Repair r-sanitizer job
* [ARROW-13497](https://issues.apache.org/jira/browse/ARROW-13497) - [C++][R] FunctionOptions not used by aggregation nodes
* [ARROW-13499](https://issues.apache.org/jira/browse/ARROW-13499) - [R] Aggregation on expression doesn't NSE correctly
* [ARROW-13500](https://issues.apache.org/jira/browse/ARROW-13500) - [C++] warning: unrecognized command line option '-Wno-unknown-warning-option' when building with gcc 9.3
* [ARROW-13504](https://issues.apache.org/jira/browse/ARROW-13504) - [Python] It is impossible to skip s3 or hdfs tests with pytest markers
* [ARROW-13507](https://issues.apache.org/jira/browse/ARROW-13507) - [R] LTO job on CRAN fails
* [ARROW-13509](https://issues.apache.org/jira/browse/ARROW-13509) - [C++] Take compute function should pass through ChunkedArray type to handle empty input arrays
* [ARROW-13522](https://issues.apache.org/jira/browse/ARROW-13522) - [C++] Regression with compute \`utf8\_\*trim\` functions on macOS.
* [ARROW-13523](https://issues.apache.org/jira/browse/ARROW-13523) - Unified the test case name
* [ARROW-13524](https://issues.apache.org/jira/browse/ARROW-13524) - [C++] Fix description for ApplicationVersion::VersionEq
* [ARROW-13529](https://issues.apache.org/jira/browse/ARROW-13529) - Too many releases in IPC writer when writing slices
* [ARROW-13538](https://issues.apache.org/jira/browse/ARROW-13538) - [R] [CI] Don't test DuckDB in the minimal build
* [ARROW-13543](https://issues.apache.org/jira/browse/ARROW-13543) - [R] Handle summarize() with 0 arguments or no aggregate functions
* [ARROW-13556](https://issues.apache.org/jira/browse/ARROW-13556) - [C++] on Ubuntu 21.04 with system libs flight is not linked against libprotobuf
* [ARROW-13559](https://issues.apache.org/jira/browse/ARROW-13559) - [CI][C++] test-conda-cpp-valgrind nightly build failure
* [ARROW-13560](https://issues.apache.org/jira/browse/ARROW-13560) - [R] Allow Scanner$create() to accept filter / project even with arrow\_dplyr\_querys
* [ARROW-13580](https://issues.apache.org/jira/browse/ARROW-13580) - [C++] quoted\_strings\_can\_be\_null only applied to string columns
* [ARROW-13597](https://issues.apache.org/jira/browse/ARROW-13597) - [C++] [R] ExecNode factory named source not present in registry
* [ARROW-13600](https://issues.apache.org/jira/browse/ARROW-13600) - [C++] Maybe uninitialized warnings
* [ARROW-13602](https://issues.apache.org/jira/browse/ARROW-13602) - [C++] Tests dereferencing type-punned pointer compiler warnings
* [ARROW-13603](https://issues.apache.org/jira/browse/ARROW-13603) - [GLib] GARROW\_VERSION\_CHECK() always returns false
* [ARROW-13605](https://issues.apache.org/jira/browse/ARROW-13605) - [C++] Data race in GroupByNode found by ThreadSanitizer
* [ARROW-13608](https://issues.apache.org/jira/browse/ARROW-13608) - [R] symbol initialization appears to be depending on undefined behavior
* [ARROW-13611](https://issues.apache.org/jira/browse/ARROW-13611) - [C++] Scanning datasets does not enforce back pressure
* [ARROW-13624](https://issues.apache.org/jira/browse/ARROW-13624) - [R] readr short type mapping has T and t backwards
* [ARROW-13628](https://issues.apache.org/jira/browse/ARROW-13628) - [Format] Add MonthDayNano interval type.
* [ARROW-13630](https://issues.apache.org/jira/browse/ARROW-13630) - [CI][C++] Travis s390x CI job is failing and blocks endianness related code verification
* [ARROW-13632](https://issues.apache.org/jira/browse/ARROW-13632) - [Python] Filter mask is always applied to elements at the start of FixedSizeListArray when filtering a slice
* [ARROW-13638](https://issues.apache.org/jira/browse/ARROW-13638) - [C++][R] GroupByNode accesses FunctionOptions after Init/ExecNode\_Aggregate keep\_alives aren't kept alive
* [ARROW-13639](https://issues.apache.org/jira/browse/ARROW-13639) - [C++] Concatenate with an empty dictionary segfaults (ASan failure in TestFilterKernelWithString/0.FilterDictionary)
* [ARROW-13654](https://issues.apache.org/jira/browse/ARROW-13654) - [C++][Parquet] Appending a FileMetaData object to itselfs explodes memory
* [ARROW-13655](https://issues.apache.org/jira/browse/ARROW-13655) - [C++][Parquet] Reading large Parquet file can give "MaxMessageSize reached" error with Thrift 0.14
* [ARROW-13662](https://issues.apache.org/jira/browse/ARROW-13662) - [CI] Failing test test\_extract\_datetime\_components with pandas 0.24
* [ARROW-13662](https://issues.apache.org/jira/browse/ARROW-13662) - [CI] Failing test test\_extract\_datetime\_components with pandas 0.24
* [ARROW-13669](https://issues.apache.org/jira/browse/ARROW-13669) - [C++] Variant emplace methods appear to be missing curly braces.
* [ARROW-13671](https://issues.apache.org/jira/browse/ARROW-13671) - [Dev] Fix conda recipe on Arm 64K page system
* [ARROW-13676](https://issues.apache.org/jira/browse/ARROW-13676) - [C++] Coredump writing Arrow table to Parquet file
* [ARROW-13681](https://issues.apache.org/jira/browse/ARROW-13681) - [C++] list\_parent\_indices only computes for first chunk
* [ARROW-13685](https://issues.apache.org/jira/browse/ARROW-13685) - [C++] Cannot write dataset to S3FileSystem if bucket already exists
* [ARROW-13689](https://issues.apache.org/jira/browse/ARROW-13689) - [C\#] Initial C\# Integration Tests
* [ARROW-13694](https://issues.apache.org/jira/browse/ARROW-13694) - [R] Arrow filter crashes (R aborted session)
* [ARROW-13743](https://issues.apache.org/jira/browse/ARROW-13743) - [CI] OSX job fails due to incompatible git and libcurl
* [ARROW-13744](https://issues.apache.org/jira/browse/ARROW-13744) - [CI] c++14 and 17 nightly job fails
* [ARROW-13747](https://issues.apache.org/jira/browse/ARROW-13747) - [CI][C++] s3fs test failed in conda-python-pandas nightly job
* [ARROW-13755](https://issues.apache.org/jira/browse/ARROW-13755) - [Python] Allow usage of field\_names in partitioning when saving datasets
* [ARROW-13761](https://issues.apache.org/jira/browse/ARROW-13761) - [R] arrow::filter() crashes (aborts R session)
* [ARROW-13784](https://issues.apache.org/jira/browse/ARROW-13784) - [Python] Table.from\_arrays should raise an error when array is empty but names is not
* [ARROW-13786](https://issues.apache.org/jira/browse/ARROW-13786) - [R] [CI] Don't fail the RCHK build if arrow doesn't build
* [ARROW-13788](https://issues.apache.org/jira/browse/ARROW-13788) - [C++] Temporal component extraction functions don't support date32/64
* [ARROW-13792](https://issues.apache.org/jira/browse/ARROW-13792) - [Java] The toString representation is incorrect for unsigned integer vectors
* [ARROW-13799](https://issues.apache.org/jira/browse/ARROW-13799) - [R] case\_when error handling is capturing strings
* [ARROW-13800](https://issues.apache.org/jira/browse/ARROW-13800) - [R] Use divide instead of divide\_checked
* [ARROW-13812](https://issues.apache.org/jira/browse/ARROW-13812) - [C++] Valgrind failure in Grouper.BooleanKey (uninitialized values)
* [ARROW-13814](https://issues.apache.org/jira/browse/ARROW-13814) - [CI] Nightly integration build with spark master failing to compile spark
* [ARROW-13819](https://issues.apache.org/jira/browse/ARROW-13819) - [C++] Build fails with "'subseconds' may be used uninitialized in this function"
* [ARROW-13846](https://issues.apache.org/jira/browse/ARROW-13846) - [C++] Fix crashes on invalid IPC file (OSS-Fuzz)
* [ARROW-13850](https://issues.apache.org/jira/browse/ARROW-13850) - [C++] Fix crashes on invalid Parquet file (OSS-Fuzz)
* [ARROW-13860](https://issues.apache.org/jira/browse/ARROW-13860) - [R] arrow 5.0.0 write\_parquet throws error writing grouped data.frame
* [ARROW-13872](https://issues.apache.org/jira/browse/ARROW-13872) - [Java] ExtensionTypeVector does not work with RangeEqualsVisitor
* [ARROW-13876](https://issues.apache.org/jira/browse/ARROW-13876) - [C++] Uniform null handling in compute functions
* [ARROW-13877](https://issues.apache.org/jira/browse/ARROW-13877) - [C++] Added support for fixed sized list to compute functions that process lists
* [ARROW-13878](https://issues.apache.org/jira/browse/ARROW-13878) - [C++] Add fixed\_size\_binary support to compute functions
* [ARROW-13880](https://issues.apache.org/jira/browse/ARROW-13880) - [C++] Compute function sort\_indices does not support timestamps with time zones
* [ARROW-13881](https://issues.apache.org/jira/browse/ARROW-13881) - [Python] Error message says "Please use a release of Arrow Flight built with gRPC 1.27 or higher." although I'm using gRPC 1.39
* [ARROW-13882](https://issues.apache.org/jira/browse/ARROW-13882) - [C++] Add compute function min\_max support for more types
* [ARROW-13884](https://issues.apache.org/jira/browse/ARROW-13884) - Arrow 5.0.0 cannot compile with Typescript 4.2.2
* [ARROW-13912](https://issues.apache.org/jira/browse/ARROW-13912) - [R] TrimOptions implementation breaks test-r-minimal-build due to dependencies
* [ARROW-13913](https://issues.apache.org/jira/browse/ARROW-13913) - [C++] segfault if compute function index called with no options supplied
* [ARROW-13915](https://issues.apache.org/jira/browse/ARROW-13915) - [R][CI] R UCRT C++ bundles are incomplete
* [ARROW-13916](https://issues.apache.org/jira/browse/ARROW-13916) - [C++] Implement strftime on date32/64 types
* [ARROW-13921](https://issues.apache.org/jira/browse/ARROW-13921) - [Python][Packaging] Pin minimum setuptools version for the macos wheels
* [ARROW-13940](https://issues.apache.org/jira/browse/ARROW-13940) - [R] Turn on multithreading with Arrow engine queries
* [ARROW-13961](https://issues.apache.org/jira/browse/ARROW-13961) - [C++] iso\_calendar may be uninitialized
* [ARROW-13976](https://issues.apache.org/jira/browse/ARROW-13976) - Adapt to arm architecture CPU in hdfs\_internal.cc
* [ARROW-13978](https://issues.apache.org/jira/browse/ARROW-13978) - [C++] Bump gtest to 1.11 to unbreak builds with recent clang
* [ARROW-13981](https://issues.apache.org/jira/browse/ARROW-13981) - [Java] VectorSchemaRootAppender doesn't work for BitVector
* [ARROW-13996](https://issues.apache.org/jira/browse/ARROW-13996) - [Go][Parquet] Fix file offsets for row groups
* [ARROW-14001](https://issues.apache.org/jira/browse/ARROW-14001) - [Go] AppendBooleans in BitmapWriter is broken
* [ARROW-14004](https://issues.apache.org/jira/browse/ARROW-14004) - [Python] to\_pandas() converts to float instead of using pandas nullable types
* [ARROW-14014](https://issues.apache.org/jira/browse/ARROW-14014) - FlightClient.ClientStreamListener not notified on error when parsing invalid trailers
* [ARROW-14017](https://issues.apache.org/jira/browse/ARROW-14017) - [C++] NULLPTR is not included in type\_fwd.h
* [ARROW-14020](https://issues.apache.org/jira/browse/ARROW-14020) - [R] Writing datafames with list columns is slow and scales poorly with nesting level
* [ARROW-14024](https://issues.apache.org/jira/browse/ARROW-14024) - [C++] ScanOptions::batch\_size not respected in parquet/IPC readers
* [ARROW-14026](https://issues.apache.org/jira/browse/ARROW-14026) - [C++] Batch readahead not working correctly in Parquet scanner
* [ARROW-14027](https://issues.apache.org/jira/browse/ARROW-14027) - [C++][R] Ensure groupers accept scalar inputs (was: Allow me to group\_by + summarise() with partitioning fields)
* [ARROW-14040](https://issues.apache.org/jira/browse/ARROW-14040) - [C++] Spurious test failure in ScanNode.MinimalGroupedAggEndToEnd
* [ARROW-14053](https://issues.apache.org/jira/browse/ARROW-14053) - [C++] AsyncReaderTests.InvalidRowsSkipped is flaky
* [ARROW-14057](https://issues.apache.org/jira/browse/ARROW-14057) - [C++] Bump aws-c-common version
* [ARROW-14063](https://issues.apache.org/jira/browse/ARROW-14063) - [R] open\_dataset() does not work on CSVs without header rows
* [ARROW-14076](https://issues.apache.org/jira/browse/ARROW-14076) - Unable to use \`red-arrow\` gem on Heroku/Ubuntu 20.04 (focal)
* [ARROW-14090](https://issues.apache.org/jira/browse/ARROW-14090) - [C++][Parquet] rows\_written\_ should be int64\_t instead of int
* [ARROW-14103](https://issues.apache.org/jira/browse/ARROW-14103) - [R] [C++] Allow min/max in grouped aggregation
* [ARROW-14109](https://issues.apache.org/jira/browse/ARROW-14109) - Segfault When Reading JSON With Duplicate Keys
* [ARROW-14124](https://issues.apache.org/jira/browse/ARROW-14124) - [R] Timezone support in R <= 3.4
* [ARROW-14129](https://issues.apache.org/jira/browse/ARROW-14129) - [C++] An empty dictionary array crashes on \`unique\` and \`value\_counts\`.
* [ARROW-14139](https://issues.apache.org/jira/browse/ARROW-14139) - [IR] [C++] Table flatbuffer object fails to compile on older GCCs
* [ARROW-14141](https://issues.apache.org/jira/browse/ARROW-14141) - [IR] [C++] Join missing from RelationImpl
* [ARROW-14156](https://issues.apache.org/jira/browse/ARROW-14156) - [C++] StructArray::Flatten is incorrect in some cases
* [ARROW-14162](https://issues.apache.org/jira/browse/ARROW-14162) - [R] Simple arrange %\>% head does not respect ordering
* [ARROW-14173](https://issues.apache.org/jira/browse/ARROW-14173) - [IR] Allow typed null literals to be represented
* [ARROW-14179](https://issues.apache.org/jira/browse/ARROW-14179) - [C++] Import/Export of UnionArray in C data interface has wrong buffer count
* [ARROW-14192](https://issues.apache.org/jira/browse/ARROW-14192) - [C++][Dataset] Backpressure broken on ordered scans
* [ARROW-14195](https://issues.apache.org/jira/browse/ARROW-14195) - [R] Fix ExecPlan binding annotations
* [ARROW-14197](https://issues.apache.org/jira/browse/ARROW-14197) - [C++] Hashjoin + datasets hanging
* [ARROW-14200](https://issues.apache.org/jira/browse/ARROW-14200) - [R] strftime on a date should not use or be confused by timezones
* [ARROW-14203](https://issues.apache.org/jira/browse/ARROW-14203) - [C++] Fix description of ExecBatch.length for Scalars in aggregate kernels
* [ARROW-14204](https://issues.apache.org/jira/browse/ARROW-14204) - [C++] Fails to compile Arrow without RE2 due to missing ifdef guard in MatchLike
* [ARROW-14206](https://issues.apache.org/jira/browse/ARROW-14206) - [Go] Fix Build for ARM and s390x
* [ARROW-14206](https://issues.apache.org/jira/browse/ARROW-14206) - [Go] Fix Build for ARM and s390x
* [ARROW-14208](https://issues.apache.org/jira/browse/ARROW-14208) - [C++] Build errors with Visual Studio 2019
* [ARROW-14210](https://issues.apache.org/jira/browse/ARROW-14210) - [C++] CMAKE\_AR is not passed to bzip2 thirdparty dependency
* [ARROW-14211](https://issues.apache.org/jira/browse/ARROW-14211) - [C++] Valgrind and TSAN errors in arrow-compute-hash-join-node-test
* [ARROW-14214](https://issues.apache.org/jira/browse/ARROW-14214) - [Python][CI] wheel-windows-cp36-amd64 nightly build failure
* [ARROW-14216](https://issues.apache.org/jira/browse/ARROW-14216) - [R] Disable auto-cleaning of duckdb tables
* [ARROW-14219](https://issues.apache.org/jira/browse/ARROW-14219) - [R] [CI] DuckDB valgrind failure
* [ARROW-14220](https://issues.apache.org/jira/browse/ARROW-14220) - [C++] Missing ending quote in thirdpartyversions
* [ARROW-14221](https://issues.apache.org/jira/browse/ARROW-14221) - [R] [CI] DuckDB tests fail on R < 4.0
* [ARROW-14223](https://issues.apache.org/jira/browse/ARROW-14223) - [C++] Add google\_cloud\_cpp\_storage to ARROW\_THIRDPARTY\_DEPENDENCIES
* [ARROW-14224](https://issues.apache.org/jira/browse/ARROW-14224) - [R] [CI] R sanitizer build failing
* [ARROW-14226](https://issues.apache.org/jira/browse/ARROW-14226) - [R] Handle n\_distinct() with args != 1
* [ARROW-14237](https://issues.apache.org/jira/browse/ARROW-14237) - [R] [CI] Disable altrep in R <= 3.5
* [ARROW-14240](https://issues.apache.org/jira/browse/ARROW-14240) - [C++] nlohmann\_json\_ep always rebuilt
* [ARROW-14246](https://issues.apache.org/jira/browse/ARROW-14246) - [C++] find\_package(CURL) in build\_google\_cloud\_cpp\_storage fails
* [ARROW-14247](https://issues.apache.org/jira/browse/ARROW-14247) - [C++] Valgrind error in parquet-arrow-test
* [ARROW-14249](https://issues.apache.org/jira/browse/ARROW-14249) - [R] Slow down in dataframe-to-table benchmark
* [ARROW-14252](https://issues.apache.org/jira/browse/ARROW-14252) - [R] Partial matching of arguments warning
* [ARROW-14255](https://issues.apache.org/jira/browse/ARROW-14255) - [Python] FlightClient.do\_action is a generator instead of returning one.
* [ARROW-14257](https://issues.apache.org/jira/browse/ARROW-14257) - [Doc][Python] dataset doc build fails
* [ARROW-14260](https://issues.apache.org/jira/browse/ARROW-14260) - [C++] GTest linker error with vcpkg and Visual Studio 2019
* [ARROW-14283](https://issues.apache.org/jira/browse/ARROW-14283) - [C++][CI] LLVM 13 cannot be used on macOS GHA builds
* [ARROW-14285](https://issues.apache.org/jira/browse/ARROW-14285) - [C++] Fix crashes when pretty-printing data from valid IPC file (OSS-Fuzz)
* [ARROW-14299](https://issues.apache.org/jira/browse/ARROW-14299) - [Dev][CI] "linux-apt-r" dockerfile reinstalls Minio
* [ARROW-14300](https://issues.apache.org/jira/browse/ARROW-14300) - [R][CI] "test-r-gcc-11" nightly build failure
* [ARROW-14301](https://issues.apache.org/jira/browse/ARROW-14301) - [C++][CI] "test-ubuntu-20.04-cpp-17" nightly build crash in GCSFS test
* [ARROW-14302](https://issues.apache.org/jira/browse/ARROW-14302) - [C++] Valgrind errors
* [ARROW-14305](https://issues.apache.org/jira/browse/ARROW-14305) - [C++] Valgrind errors in arrow-compute-hash-join-node-test
* [ARROW-14307](https://issues.apache.org/jira/browse/ARROW-14307) - [R] crashes when reading empty feather with POSIXct column
* [ARROW-14313](https://issues.apache.org/jira/browse/ARROW-14313) - [Doc][Dev] Installation instructions for Archery incomplete
* [ARROW-14321](https://issues.apache.org/jira/browse/ARROW-14321) - [R] segfault converting dictionary ChunkedArray with 0 chunks
* [ARROW-14340](https://issues.apache.org/jira/browse/ARROW-14340) - [C++] Fix xsimd build error on apple m1
* [ARROW-14370](https://issues.apache.org/jira/browse/ARROW-14370) - [C++] ASAN CI job failed
* [ARROW-14373](https://issues.apache.org/jira/browse/ARROW-14373) - [Packaging][Java] Missing LLVM dependency in the macOS java-jars build
* [ARROW-14377](https://issues.apache.org/jira/browse/ARROW-14377) - [Packaging][Python] Python 3.9 installation fails in macOS wheel build
* [ARROW-14381](https://issues.apache.org/jira/browse/ARROW-14381) - [CI][Python] Spark integration failures
* [ARROW-14382](https://issues.apache.org/jira/browse/ARROW-14382) - [C++][Compute] Remove duplicate ThreadIndexer definition
* [ARROW-14392](https://issues.apache.org/jira/browse/ARROW-14392) - [C++] Bundled gRPC misses bundled Abseil include path
* [ARROW-14393](https://issues.apache.org/jira/browse/ARROW-14393) - [C++] GTest linking errors during the source release verification
* [ARROW-14397](https://issues.apache.org/jira/browse/ARROW-14397) - [C++] Fix valgrind error in test utility
* [ARROW-14406](https://issues.apache.org/jira/browse/ARROW-14406) - [Python][CI] Nightly dask integration jobs fail
* [ARROW-14411](https://issues.apache.org/jira/browse/ARROW-14411) - [Release][Integration] Go integration tests fail for 6.0.0-RC1
* [ARROW-14417](https://issues.apache.org/jira/browse/ARROW-14417) - [R] Joins ignore projection on left dataset
* [ARROW-14423](https://issues.apache.org/jira/browse/ARROW-14423) - [Python] Fix version constraints in pyproject.toml
* [ARROW-14424](https://issues.apache.org/jira/browse/ARROW-14424) - [Packaging][Python] Disable windows wheel testing for python 3.6
* [ARROW-14434](https://issues.apache.org/jira/browse/ARROW-14434) - R crashes when making an empty selection for Datasets with DateTime
* [PARQUET-2067](https://issues.apache.org/jira/browse/PARQUET-2067) - [C++]  null\_count and num\_nulls incorrect for repeated columns
* [PARQUET-2089](https://issues.apache.org/jira/browse/PARQUET-2089) - [C++] RowGroupMetaData file\_offset set incorrectly

* [ARROW-1568](https://issues.apache.org/jira/browse/ARROW-1568) - [C++] Implement "drop null" kernels that return array without nulls
* [ARROW-4333](https://issues.apache.org/jira/browse/ARROW-4333) - [C++] Sketch out design for kernels and "query" execution in compute layer
* [ARROW-4700](https://issues.apache.org/jira/browse/ARROW-4700) - [C++] Add DecimalType support to arrow::json::TableReader
* [ARROW-5002](https://issues.apache.org/jira/browse/ARROW-5002) - [C++] Implement Hash Aggregation query execution node
* [ARROW-5244](https://issues.apache.org/jira/browse/ARROW-5244) - [C++] Review experimental / unstable APIs
* [ARROW-6072](https://issues.apache.org/jira/browse/ARROW-6072) - [C++] Implement casting List <-\> LargeList
* [ARROW-6607](https://issues.apache.org/jira/browse/ARROW-6607) - [Python] Support for set/list columns when converting from Pandas
* [ARROW-6626](https://issues.apache.org/jira/browse/ARROW-6626) - [Python] Handle nested "set" values as lists when converting to Arrow
* [ARROW-6870](https://issues.apache.org/jira/browse/ARROW-6870) - [C\#] Add Support for Dictionary Arrays and Dictionary Encoding
* [ARROW-7102](https://issues.apache.org/jira/browse/ARROW-7102) - [Python] Make filesystems compatible with fsspec
* [ARROW-7179](https://issues.apache.org/jira/browse/ARROW-7179) - [C++][Compute] Consolidate fill\_null and coalesce
* [ARROW-7901](https://issues.apache.org/jira/browse/ARROW-7901) - [Integration][Go] Add null type (and integration test)
* [ARROW-8022](https://issues.apache.org/jira/browse/ARROW-8022) - [C++] Provide or Vendor a small\_vector implementation
* [ARROW-8147](https://issues.apache.org/jira/browse/ARROW-8147) - [C++] Add google-cloud-cpp to ThirdpartyToolchain
* [ARROW-8379](https://issues.apache.org/jira/browse/ARROW-8379) - [R] Investigate/fix thread safety issues (esp. Windows)
* [ARROW-8621](https://issues.apache.org/jira/browse/ARROW-8621) - [Release][Go] Add Module support by creating tags
* [ARROW-8780](https://issues.apache.org/jira/browse/ARROW-8780) - [Python] A fsspec-compatible wrapper for pyarrow.fs filesystems
* [ARROW-8928](https://issues.apache.org/jira/browse/ARROW-8928) - [C++] Measure microperformance associated with ExecBatchIterator
* [ARROW-9226](https://issues.apache.org/jira/browse/ARROW-9226) - [Python] pyarrow.fs.HadoopFileSystem - retrieve options from core-site.xml or hdfs-site.xml if available
* [ARROW-9434](https://issues.apache.org/jira/browse/ARROW-9434) - [C++] Store type\_code information in UnionScalar::value
* [ARROW-9719](https://issues.apache.org/jira/browse/ARROW-9719) - [Doc][Python] Better document the new pa.fs.HadoopFileSystem
* [ARROW-10094](https://issues.apache.org/jira/browse/ARROW-10094) - [Python][Doc] Update pandas doc
* [ARROW-10415](https://issues.apache.org/jira/browse/ARROW-10415) - [R] Support for dplyr::distinct()
* [ARROW-10898](https://issues.apache.org/jira/browse/ARROW-10898) - [C++] Investigate Table sort performance
* [ARROW-11238](https://issues.apache.org/jira/browse/ARROW-11238) - [Python] Make SubTreeFileSystem print method more informative
* [ARROW-11243](https://issues.apache.org/jira/browse/ARROW-11243) - [C++] Parse time32 from string and infer in CSV reader
* [ARROW-11460](https://issues.apache.org/jira/browse/ARROW-11460) - [R] Use system libraries if present on Linux
* [ARROW-11691](https://issues.apache.org/jira/browse/ARROW-11691) - [Developer][CI] Provide a consolidated .env file for benchmark-relevant environment variables
* [ARROW-11748](https://issues.apache.org/jira/browse/ARROW-11748) - [C++] Ensure Decimal128 and Decimal256's fields are in native endian order
* [ARROW-11828](https://issues.apache.org/jira/browse/ARROW-11828) - [C++] Expose CSVWriter object in api
* [ARROW-11885](https://issues.apache.org/jira/browse/ARROW-11885) - [R] Turn off some capabilities when LIBARROW\_MINIMAL=true
* [ARROW-11981](https://issues.apache.org/jira/browse/ARROW-11981) - [C++][Dataset][Compute] Replace UnionDataset with Union ExecNode
* [ARROW-12063](https://issues.apache.org/jira/browse/ARROW-12063) - [C++] Add nulls position option to sort functions
* [ARROW-12181](https://issues.apache.org/jira/browse/ARROW-12181) - [C++][R] The "CSV dataset" in test-dataset.R is failing on RTools 3.5
* [ARROW-12216](https://issues.apache.org/jira/browse/ARROW-12216) - [R] Proactively disable multithreading on RTools3.5 (32bit?)
* [ARROW-12359](https://issues.apache.org/jira/browse/ARROW-12359) - [C++] Deprecate or remove FileSystem::OpenAppendStream
* [ARROW-12388](https://issues.apache.org/jira/browse/ARROW-12388) - [C++][Gandiva] Implement cast numbers from varbinary functions in gandiva
* [ARROW-12410](https://issues.apache.org/jira/browse/ARROW-12410) - [C++][Gandiva] Implement regexp\_replace function on Gandiva
* [ARROW-12479](https://issues.apache.org/jira/browse/ARROW-12479) - [C++][Gandiva] Implement castBigInt, castInt, castIntervalDay and castIntervalYear extra functions
* [ARROW-12563](https://issues.apache.org/jira/browse/ARROW-12563) - Add space,add\_months and datediff functions for string
* [ARROW-12615](https://issues.apache.org/jira/browse/ARROW-12615) - [C++] Add options for handling NAs to stddev and variance
* [ARROW-12650](https://issues.apache.org/jira/browse/ARROW-12650) - [Doc][Python] Improve documentation regarding dealing with memory mapped files
* [ARROW-12657](https://issues.apache.org/jira/browse/ARROW-12657) - [C++][Python][Compute] String hex to numeric conversion and bit shifting
* [ARROW-12669](https://issues.apache.org/jira/browse/ARROW-12669) - [C++] Kernel to return Array of elements at index of list in ListArray
* [ARROW-12673](https://issues.apache.org/jira/browse/ARROW-12673) - [C++] Configure a custom handler for rows with incorrect column counts
* [ARROW-12688](https://issues.apache.org/jira/browse/ARROW-12688) - [R] Use DuckDB to query an Arrow Dataset
* [ARROW-12714](https://issues.apache.org/jira/browse/ARROW-12714) - [C++] String title case kernel
* [ARROW-12725](https://issues.apache.org/jira/browse/ARROW-12725) - [C++][Compute] GroupBy: improve performance by encoding keys in row format only when they are inserted into hash table
* [ARROW-12728](https://issues.apache.org/jira/browse/ARROW-12728) - [C++][Compute] Implement count\_distinct/distinct hash aggregate kernels
* [ARROW-12744](https://issues.apache.org/jira/browse/ARROW-12744) - [C++][Compute] Add rounding kernel
* [ARROW-12759](https://issues.apache.org/jira/browse/ARROW-12759) - [C++][Compute] Wrap grouped aggregation in an ExecNode
* [ARROW-12763](https://issues.apache.org/jira/browse/ARROW-12763) - [R] Optimize dplyr queries that use head/tail after arrange
* [ARROW-12846](https://issues.apache.org/jira/browse/ARROW-12846) - [Release] Improve upload of binaries
* [ARROW-12866](https://issues.apache.org/jira/browse/ARROW-12866) - [C++][Gandiva] Implement STRPOS function on Gandiva
* [ARROW-12871](https://issues.apache.org/jira/browse/ARROW-12871) - [R] upgrade to testthat 3e
* [ARROW-12876](https://issues.apache.org/jira/browse/ARROW-12876) - [R] Fix build flags on Raspberry Pi
* [ARROW-12944](https://issues.apache.org/jira/browse/ARROW-12944) - [C++] String capitalize kernel
* [ARROW-12946](https://issues.apache.org/jira/browse/ARROW-12946) - [C++] String swap case kernel
* [ARROW-12953](https://issues.apache.org/jira/browse/ARROW-12953) - [C++][Compute] Refactor CheckScalar\* to take Datum arguments
* [ARROW-12959](https://issues.apache.org/jira/browse/ARROW-12959) - [C++][R] Option for is\_null(NaN) to evaluate to true
* [ARROW-12965](https://issues.apache.org/jira/browse/ARROW-12965) - [Java] Java implementation of Arrow C data interface
* [ARROW-12980](https://issues.apache.org/jira/browse/ARROW-12980) - [C++] Kernels to extract datetime components should be timezone aware
* [ARROW-12981](https://issues.apache.org/jira/browse/ARROW-12981) - [R] Install source package from CRAN alone
* [ARROW-13033](https://issues.apache.org/jira/browse/ARROW-13033) - [C++] Kernel to localize naive timestamps to a timezone (preserving clock-time)
* [ARROW-13056](https://issues.apache.org/jira/browse/ARROW-13056) - [Dev][MATLAB] Expand PR labeler for supported language
* [ARROW-13067](https://issues.apache.org/jira/browse/ARROW-13067) - [C++][Compute] Implement integer to decimal cast
* [ARROW-13089](https://issues.apache.org/jira/browse/ARROW-13089) - [Python] Allow creating RecordBatch from Python dict
* [ARROW-13112](https://issues.apache.org/jira/browse/ARROW-13112) - [R] altrep vectors for strings and other types
* [ARROW-13132](https://issues.apache.org/jira/browse/ARROW-13132) - [C++] Add Scalar validation
* [ARROW-13138](https://issues.apache.org/jira/browse/ARROW-13138) - [C++] Implement kernel to extract datetime components (year, month, day, etc) from date type objects
* [ARROW-13141](https://issues.apache.org/jira/browse/ARROW-13141) - [C++][Python] HadoopFileSystem: automatically set CLASSPATH based on HADOOP\_HOME env variable?
* [ARROW-13163](https://issues.apache.org/jira/browse/ARROW-13163) - [C++][Gandiva] Implement REPEAT function on Gandiva
* [ARROW-13164](https://issues.apache.org/jira/browse/ARROW-13164) - [R] altrep vectors from Array with nulls
* [ARROW-13172](https://issues.apache.org/jira/browse/ARROW-13172) - [Java] Make TYPE\_WIDTH in Vector public
* [ARROW-13174](https://issues.apache.org/jira/browse/ARROW-13174) - [C++][Compute] Add strftime kernel
* [ARROW-13202](https://issues.apache.org/jira/browse/ARROW-13202) - [MATLAB] Enable GitHub Actions CI for MATLAB Interface on Linux
* [ARROW-13218](https://issues.apache.org/jira/browse/ARROW-13218) - [Doc] Document/clarify conventions for timestamp storage
* [ARROW-13220](https://issues.apache.org/jira/browse/ARROW-13220) - [C++] Add a 'choose' kernel/scalar compute function
* [ARROW-13222](https://issues.apache.org/jira/browse/ARROW-13222) - [C++] Support variable-width types in case\_when function
* [ARROW-13227](https://issues.apache.org/jira/browse/ARROW-13227) - [C++][Compute] Document ExecNode, ExecPlan
* [ARROW-13257](https://issues.apache.org/jira/browse/ARROW-13257) - [Java][Dataset] Allow passing empty columns for projection
* [ARROW-13260](https://issues.apache.org/jira/browse/ARROW-13260) - [Doc] Host different released versions of the documentation + version switcher
* [ARROW-13268](https://issues.apache.org/jira/browse/ARROW-13268) - [C++][Compute] Add ExecNode for semi and anti-semi join
* [ARROW-13279](https://issues.apache.org/jira/browse/ARROW-13279) - [R] Use C++ DayOfWeekOptions in wday implementation instead of manually calculating via Expression
* [ARROW-13287](https://issues.apache.org/jira/browse/ARROW-13287) - [C++] [Dataset] FileSystemDataset::Write should use an async scan
* [ARROW-13295](https://issues.apache.org/jira/browse/ARROW-13295) - [C++] Implement hash\_aggregate mean/stdev/variance kernels
* [ARROW-13298](https://issues.apache.org/jira/browse/ARROW-13298) - [C++] Implement hash\_aggregate any/all Boolean kernels
* [ARROW-13307](https://issues.apache.org/jira/browse/ARROW-13307) - [C++] Remove reflection-based enums (was: Use reflection-based enums for compute options)
* [ARROW-13311](https://issues.apache.org/jira/browse/ARROW-13311) - [C++][Documentation] List hash aggregate kernels somewhere
* [ARROW-13317](https://issues.apache.org/jira/browse/ARROW-13317) - [Python] Improve documentation on what 'use\_threads' does in 'read\_feather'
* [ARROW-13326](https://issues.apache.org/jira/browse/ARROW-13326) - [R] [Archery] Add linting to dev CI
* [ARROW-13327](https://issues.apache.org/jira/browse/ARROW-13327) - [Python] Improve consistency of explicit C++ types in PyArrow files
* [ARROW-13330](https://issues.apache.org/jira/browse/ARROW-13330) - [Go][Parquet] Add Encoding Package Part 2
* [ARROW-13344](https://issues.apache.org/jira/browse/ARROW-13344) - [R] Initial bindings for ExecPlan/ExecNode
* [ARROW-13345](https://issues.apache.org/jira/browse/ARROW-13345) - [C++] Implement logN compute function
* [ARROW-13358](https://issues.apache.org/jira/browse/ARROW-13358) - [C++] Extend type support for if\_else kernel
* [ARROW-13379](https://issues.apache.org/jira/browse/ARROW-13379) - [Dev][Docs] Improvements to archery docs
* [ARROW-13390](https://issues.apache.org/jira/browse/ARROW-13390) - [C++] Improve type support for 'coalesce' kernel
* [ARROW-13397](https://issues.apache.org/jira/browse/ARROW-13397) - [R] Update arrow.Rmd vignette
* [ARROW-13399](https://issues.apache.org/jira/browse/ARROW-13399) - [R] Update dataset.Rmd vignette
* [ARROW-13402](https://issues.apache.org/jira/browse/ARROW-13402) - [R] Update flight.Rmd vignette
* [ARROW-13403](https://issues.apache.org/jira/browse/ARROW-13403) - [R] Update developing.Rmd vignette
* [ARROW-13404](https://issues.apache.org/jira/browse/ARROW-13404) - [Python] [Doc] Make Python landing page less coupled to the rest of arrow documentation
* [ARROW-13405](https://issues.apache.org/jira/browse/ARROW-13405) - [Doc] Make "Libraries" the entry point for the documentation
* [ARROW-13416](https://issues.apache.org/jira/browse/ARROW-13416) - [C++] Implement mod compute function
* [ARROW-13420](https://issues.apache.org/jira/browse/ARROW-13420) - [JS] Update dependencies
* [ARROW-13421](https://issues.apache.org/jira/browse/ARROW-13421) - [C++]  Add functionality for reading in columns as floats from delimited files where a comma has been used as a decimal separator
* [ARROW-13433](https://issues.apache.org/jira/browse/ARROW-13433) - [R] Remove CLI hack from Valgrind test
* [ARROW-13434](https://issues.apache.org/jira/browse/ARROW-13434) - [R] group\_by() with an unnammed expression
* [ARROW-13435](https://issues.apache.org/jira/browse/ARROW-13435) - [R] Add function arrow\_table() as alias for Table$create()
* [ARROW-13444](https://issues.apache.org/jira/browse/ARROW-13444) - [C++] C++20 compatibility by updating std::result\_of to std::invoke\_result
* [ARROW-13448](https://issues.apache.org/jira/browse/ARROW-13448) - [R] Bindings for strftime
* [ARROW-13453](https://issues.apache.org/jira/browse/ARROW-13453) - [R] DuckDB has not yet released 0.2.8
* [ARROW-13455](https://issues.apache.org/jira/browse/ARROW-13455) - [C++][Docs] Typo in RecordBatch::SetColumn
* [ARROW-13458](https://issues.apache.org/jira/browse/ARROW-13458) - [C++][Docs] Typo in RecordBatch::schema
* [ARROW-13459](https://issues.apache.org/jira/browse/ARROW-13459) - [C++][Docs] Missing param docs for RecordBatch::SetColumn
* [ARROW-13461](https://issues.apache.org/jira/browse/ARROW-13461) - [Python][Packaging] Build M1 wheels for python 3.8
* [ARROW-13463](https://issues.apache.org/jira/browse/ARROW-13463) - [Release][Python] Verify python 3.8 macOS arm64 wheel
* [ARROW-13465](https://issues.apache.org/jira/browse/ARROW-13465) - [R] to\_arrow() from duckdb
* [ARROW-13466](https://issues.apache.org/jira/browse/ARROW-13466) - [R] make installation fail if Arrow C++ dependencies cannot be installed
* [ARROW-13468](https://issues.apache.org/jira/browse/ARROW-13468) - [Release] Fix binary download/upload failures
* [ARROW-13472](https://issues.apache.org/jira/browse/ARROW-13472) - [R] Remove .engine = "duckdb" argument
* [ARROW-13475](https://issues.apache.org/jira/browse/ARROW-13475) - [Release] Don't consider rust tarballs when cleaning up old releases
* [ARROW-13476](https://issues.apache.org/jira/browse/ARROW-13476) - [Doc][Python] Ensure that ipc/io documentation uses context managers instead of manually closing streams
* [ARROW-13478](https://issues.apache.org/jira/browse/ARROW-13478) - [Release] Unnecessary rc-number argument for the version bumping post-release script
* [ARROW-13480](https://issues.apache.org/jira/browse/ARROW-13480) - [C++] [R] [Python] Dataset SyncScanner may freeze on error
* [ARROW-13482](https://issues.apache.org/jira/browse/ARROW-13482) - [C++][Compute] Provide a registry for ExecNode implementations
* [ARROW-13485](https://issues.apache.org/jira/browse/ARROW-13485) - [Release] Replace ${PREVIOUS\_RELEASE}.9000 in r/NEWS.md by post-12-bump-versions.sh
* [ARROW-13488](https://issues.apache.org/jira/browse/ARROW-13488) - [Website] Update Linux packages install information for 5.0.0
* [ARROW-13489](https://issues.apache.org/jira/browse/ARROW-13489) - [R] Bump CI jobs after 5.0.0
* [ARROW-13501](https://issues.apache.org/jira/browse/ARROW-13501) - [R] Bindings for count aggregation
* [ARROW-13502](https://issues.apache.org/jira/browse/ARROW-13502) - [R] Bindings for min/max aggregation
* [ARROW-13503](https://issues.apache.org/jira/browse/ARROW-13503) - [GLib][Ruby][Flight] Add support for DoGet
* [ARROW-13506](https://issues.apache.org/jira/browse/ARROW-13506) - Upgrade ORC to 1.6.9
* [ARROW-13508](https://issues.apache.org/jira/browse/ARROW-13508) - [C++] Allow custom RetryStrategy objects to be passed to S3FileSystem
* [ARROW-13510](https://issues.apache.org/jira/browse/ARROW-13510) - [CI][R][C++] Add -Wall to fedora-clang-devel as-cran checks
* [ARROW-13511](https://issues.apache.org/jira/browse/ARROW-13511) - [CI][R] Fail in the docker build step if R deps don't install
* [ARROW-13516](https://issues.apache.org/jira/browse/ARROW-13516) - [C++] Mingw-w64 + Clang (lld) doesn't support --version-script
* [ARROW-13519](https://issues.apache.org/jira/browse/ARROW-13519) - [R] Make doc examples less noisy
* [ARROW-13520](https://issues.apache.org/jira/browse/ARROW-13520) - [C++] Implement hash\_aggregate approximate quantile kernel
* [ARROW-13521](https://issues.apache.org/jira/browse/ARROW-13521) - [C++][Docs] Add note about tdigest in compute functions docs
* [ARROW-13525](https://issues.apache.org/jira/browse/ARROW-13525) - [Python] Mention alternatives in deprecation message of ParquetDataset attributes
* [ARROW-13528](https://issues.apache.org/jira/browse/ARROW-13528) - [R] Bindings for mean, var, sd aggregation
* [ARROW-13532](https://issues.apache.org/jira/browse/ARROW-13532) - [C++][Compute] Join: add set membership test method to the grouper
* [ARROW-13534](https://issues.apache.org/jira/browse/ARROW-13534) - [C++] Improve csv chunker
* [ARROW-13540](https://issues.apache.org/jira/browse/ARROW-13540) - [C++][Compute] Add OrderByNode for ordering of rows in an ExecPlan
* [ARROW-13541](https://issues.apache.org/jira/browse/ARROW-13541) - [C++][Python] Implement ExtensionScalar
* [ARROW-13542](https://issues.apache.org/jira/browse/ARROW-13542) - [C++][Compute][Dataset] Add dataset::WriteNode for writing rows from an ExecPlan to disk
* [ARROW-13544](https://issues.apache.org/jira/browse/ARROW-13544) - [Java] Remove APIs that have been deprecated for long
* [ARROW-13544](https://issues.apache.org/jira/browse/ARROW-13544) - [Java] Remove APIs that have been deprecated for long
* [ARROW-13544](https://issues.apache.org/jira/browse/ARROW-13544) - [Java] Remove APIs that have been deprecated for long
* [ARROW-13548](https://issues.apache.org/jira/browse/ARROW-13548) - [C++] Implement datediff kernel
* [ARROW-13549](https://issues.apache.org/jira/browse/ARROW-13549) - [C++] Implement timestamp to date/time cast that extracts value
* [ARROW-13550](https://issues.apache.org/jira/browse/ARROW-13550) - [R] Support .groups argument to dplyr::summarize()
* [ARROW-13552](https://issues.apache.org/jira/browse/ARROW-13552) - [C++] Remove deprecated APIs
* [ARROW-13557](https://issues.apache.org/jira/browse/ARROW-13557) - [Packaging][Python] Skip test\_cancellation test case on M1
* [ARROW-13561](https://issues.apache.org/jira/browse/ARROW-13561) - [C++] Implement week kernel that accepts WeekOptions
* [ARROW-13562](https://issues.apache.org/jira/browse/ARROW-13562) - [R] Styler followups
* [ARROW-13565](https://issues.apache.org/jira/browse/ARROW-13565) - [Packaging][Ubuntu] Drop support for 20.10
* [ARROW-13572](https://issues.apache.org/jira/browse/ARROW-13572) - [C++][Python] Add basic ORC support to the pyarrow.datasets API
* [ARROW-13573](https://issues.apache.org/jira/browse/ARROW-13573) - [C++] Support dictionaries directly in case\_when kernel
* [ARROW-13574](https://issues.apache.org/jira/browse/ARROW-13574) - [C++] Add 'count all' option to count (hash) aggregate kernel
* [ARROW-13575](https://issues.apache.org/jira/browse/ARROW-13575) - [C++] Implement product aggregate & hash aggregate kernels
* [ARROW-13576](https://issues.apache.org/jira/browse/ARROW-13576) - [C++][Compute] Replace ExecNode::InputReceived with ::MakeTask
* [ARROW-13577](https://issues.apache.org/jira/browse/ARROW-13577) - [Python][FlightRPC] pyarrow client do\_put close method after write\_table did not throw flight error
* [ARROW-13585](https://issues.apache.org/jira/browse/ARROW-13585) - [GLib] Add support for C ABI interface
* [ARROW-13587](https://issues.apache.org/jira/browse/ARROW-13587) - [R] Handle --use-LTO override
* [ARROW-13595](https://issues.apache.org/jira/browse/ARROW-13595) - [C++] Add debug mode check for compute kernel output type
* [ARROW-13604](https://issues.apache.org/jira/browse/ARROW-13604) - [Java] Remove deprecation annotations for APIs representing unsupported operations
* [ARROW-13606](https://issues.apache.org/jira/browse/ARROW-13606) - [R] Actually disable LTO
* [ARROW-13613](https://issues.apache.org/jira/browse/ARROW-13613) - [C++] Implement sum/mean aggregations over decimals
* [ARROW-13614](https://issues.apache.org/jira/browse/ARROW-13614) - [C++] Implement min\_max aggregation over decimal
* [ARROW-13618](https://issues.apache.org/jira/browse/ARROW-13618) - [R] Use Arrow engine for summarize() by default
* [ARROW-13620](https://issues.apache.org/jira/browse/ARROW-13620) - [R] Binding for n\_distinct()
* [ARROW-13626](https://issues.apache.org/jira/browse/ARROW-13626) - [R] Bindings for log base b
* [ARROW-13627](https://issues.apache.org/jira/browse/ARROW-13627) - [C++] ScalarAggregateOptions don't make sense (in hash aggregation)
* [ARROW-13629](https://issues.apache.org/jira/browse/ARROW-13629) - [Ruby] Add support for building/converting map
* [ARROW-13633](https://issues.apache.org/jira/browse/ARROW-13633) - [Packaging][Debian] Add support for bookworm
* [ARROW-13634](https://issues.apache.org/jira/browse/ARROW-13634) - [R] Update distro() in nixlibs.R to map from "bookworm" to 12
* [ARROW-13635](https://issues.apache.org/jira/browse/ARROW-13635) - [Packaging][Python] Define --with-lg-page for jemalloc in the arm manylinux builds
* [ARROW-13637](https://issues.apache.org/jira/browse/ARROW-13637) - [Python][Doc] Make docstrings conform to same style
* [ARROW-13642](https://issues.apache.org/jira/browse/ARROW-13642) - [C++][Compute] Implement many-to-many inner hash join
* [ARROW-13645](https://issues.apache.org/jira/browse/ARROW-13645) - [Java] Allow NullVectors to have distinct field names
* [ARROW-13646](https://issues.apache.org/jira/browse/ARROW-13646) - [Go][Parquet] Add Metadata Package
* [ARROW-13648](https://issues.apache.org/jira/browse/ARROW-13648) - [Dev] Use \#!/usr/bin/env instead of \#!/bin where possible
* [ARROW-13650](https://issues.apache.org/jira/browse/ARROW-13650) - [C++] Create dataset writer to encapsulate dataset writer logic
* [ARROW-13651](https://issues.apache.org/jira/browse/ARROW-13651) - [Ruby] Add support for converting [Symbol] to Arrow array
* [ARROW-13652](https://issues.apache.org/jira/browse/ARROW-13652) - [Python] Expose the CopyFiles utility in Python
* [ARROW-13660](https://issues.apache.org/jira/browse/ARROW-13660) - [C++][Compute] Remove \`seq\` as a parameter of ExecNode::InputReceived
* [ARROW-13670](https://issues.apache.org/jira/browse/ARROW-13670) - [C++] Do a round of compiler warning cleanups
* [ARROW-13674](https://issues.apache.org/jira/browse/ARROW-13674) - [Dev][CI] PR checks workflow should check for JIRA components
* [ARROW-13675](https://issues.apache.org/jira/browse/ARROW-13675) - [Doc][Python] Add a recipe on how to save partitioned datasets to the Cookbook
* [ARROW-13679](https://issues.apache.org/jira/browse/ARROW-13679) - [GLib][Ruby] Add support for group aggregation
* [ARROW-13680](https://issues.apache.org/jira/browse/ARROW-13680) - [C++] Create an asynchronous nursery to simplify capture logic
* [ARROW-13682](https://issues.apache.org/jira/browse/ARROW-13682) - [C++] Add TDigest::Merge(const TDigest&)
* [ARROW-13684](https://issues.apache.org/jira/browse/ARROW-13684) - [C++][Compute] Strftime kernel follow-up
* [ARROW-13686](https://issues.apache.org/jira/browse/ARROW-13686) - [Python] Update deprecated pytest yield\_fixture functions
* [ARROW-13687](https://issues.apache.org/jira/browse/ARROW-13687) - [Ruby] Add support for loading table by Arrow Dataset
* [ARROW-13691](https://issues.apache.org/jira/browse/ARROW-13691) - [C++] Add option to handle NAs to VarianceOptions
* [ARROW-13693](https://issues.apache.org/jira/browse/ARROW-13693) - [Website] arrow-site should pin down a specific Ruby version and leverage toolings like rbenv
* [ARROW-13696](https://issues.apache.org/jira/browse/ARROW-13696) - [Python] Support for MapType with Fields
* [ARROW-13699](https://issues.apache.org/jira/browse/ARROW-13699) - [Python][Doc] Refactor the FileSystem Interface documentation
* [ARROW-13700](https://issues.apache.org/jira/browse/ARROW-13700) - [Docs][C++] Clarify DayOfWeekOptions args
* [ARROW-13702](https://issues.apache.org/jira/browse/ARROW-13702) - [Python] test\_parquet\_dataset\_deprecated\_properties missing a dataset mark
* [ARROW-13704](https://issues.apache.org/jira/browse/ARROW-13704) - [C\#] Add support for reading streaming format delta dictionaries
* [ARROW-13705](https://issues.apache.org/jira/browse/ARROW-13705) - [Website] Pin node version
* [ARROW-13721](https://issues.apache.org/jira/browse/ARROW-13721) - [Doc][Cookbook] Specifying Schemas - Python
* [ARROW-13733](https://issues.apache.org/jira/browse/ARROW-13733) - [Java] Allow JDBC adapters to reuse vector schema roots
* [ARROW-13734](https://issues.apache.org/jira/browse/ARROW-13734) - [Format] Clarify allowed values for time types
* [ARROW-13736](https://issues.apache.org/jira/browse/ARROW-13736) - [C++] Reconcile PrettyPrint and StringFormatter
* [ARROW-13737](https://issues.apache.org/jira/browse/ARROW-13737) - [C++] Support scalar columns in hash aggregations (was: hash\_sum on scalar column segfaults)
* [ARROW-13739](https://issues.apache.org/jira/browse/ARROW-13739) - [R] Support dplyr::count() and tally()
* [ARROW-13740](https://issues.apache.org/jira/browse/ARROW-13740) - [R] summarize() should not eagerly evaluate
* [ARROW-13757](https://issues.apache.org/jira/browse/ARROW-13757) - [R] Fix download of C++ source for CRAN patch releases
* [ARROW-13759](https://issues.apache.org/jira/browse/ARROW-13759) - [C++] Update linting and formatting scripts to specify python3 in shebang line
* [ARROW-13760](https://issues.apache.org/jira/browse/ARROW-13760) - [C++] Bump Protobuf version to 3.15 when Flight is enabled
* [ARROW-13764](https://issues.apache.org/jira/browse/ARROW-13764) - [C++] Implement ScalarAggregateOptions for count\_distinct (grouped)
* [ARROW-13768](https://issues.apache.org/jira/browse/ARROW-13768) - [R] Allow JSON to be an optional component
* [ARROW-13772](https://issues.apache.org/jira/browse/ARROW-13772) - [R] Binding for median() and quantile() aggregation functions
* [ARROW-13776](https://issues.apache.org/jira/browse/ARROW-13776) - [C++] Offline thirdparty versions.txt is missing extensions for some files
* [ARROW-13777](https://issues.apache.org/jira/browse/ARROW-13777) - [R] mutate after group\_by should be ok as long as there are only scalar functions
* [ARROW-13778](https://issues.apache.org/jira/browse/ARROW-13778) - [R] Handle complex summarize expressions
* [ARROW-13782](https://issues.apache.org/jira/browse/ARROW-13782) - [C++] Add option to handle NAs to TDigest, Index, Mode, Quantile aggregates
* [ARROW-13783](https://issues.apache.org/jira/browse/ARROW-13783) - [Python] Improve Table.to\_string (and maybe \_\_repr\_\_) to also preview data of the table
* [ARROW-13785](https://issues.apache.org/jira/browse/ARROW-13785) - [C++] Print methods for ExecPlan and ExecNode
* [ARROW-13787](https://issues.apache.org/jira/browse/ARROW-13787) - [C++] Verify third-party downloads
* [ARROW-13789](https://issues.apache.org/jira/browse/ARROW-13789) - [Go] Implement Arrow Scalar Values for Go
* [ARROW-13793](https://issues.apache.org/jira/browse/ARROW-13793) - [C++] Migrate ORCFileReader to Result<T\>
* [ARROW-13794](https://issues.apache.org/jira/browse/ARROW-13794) - [C++] Deprecate Parquet pseudo-version "2.0"
* [ARROW-13797](https://issues.apache.org/jira/browse/ARROW-13797) - [C++] Implement column projection pushdown to ORC reader in Datasets API
* [ARROW-13803](https://issues.apache.org/jira/browse/ARROW-13803) - [C++] Segfault on filtering taxi dataset
* [ARROW-13804](https://issues.apache.org/jira/browse/ARROW-13804) - [Go] Add Support for Interval Type Month, Day, Nano
* [ARROW-13806](https://issues.apache.org/jira/browse/ARROW-13806) - [Python] Add conversion to/from Pandas/Python for Month, Day Nano Interval Type
* [ARROW-13809](https://issues.apache.org/jira/browse/ARROW-13809) - [C ABI] Add support for Month, Day, Nanosecond interval type to C-ABI
* [ARROW-13810](https://issues.apache.org/jira/browse/ARROW-13810) - [C++][Compute] Predicate IsAsciiCharacter allows invalid types and values
* [ARROW-13815](https://issues.apache.org/jira/browse/ARROW-13815) - [R] Adapt to new callstack changes in rlang
* [ARROW-13816](https://issues.apache.org/jira/browse/ARROW-13816) - [Go] Implement Consumer APIs for C Data Interface
* [ARROW-13820](https://issues.apache.org/jira/browse/ARROW-13820) - [R] Rename na.min\_count to min\_count and na.rm to skip\_nulls
* [ARROW-13821](https://issues.apache.org/jira/browse/ARROW-13821) - [R] Handle na.rm in sd, var bindings
* [ARROW-13823](https://issues.apache.org/jira/browse/ARROW-13823) - Exclude .factorypath from git and RAT plugin
* [ARROW-13824](https://issues.apache.org/jira/browse/ARROW-13824) - [C++][Compute] Make constexpr BooleanToNumber kernel
* [ARROW-13831](https://issues.apache.org/jira/browse/ARROW-13831) - [GLib][Ruby] Add support for writing by Arrow Dataset
* [ARROW-13835](https://issues.apache.org/jira/browse/ARROW-13835) - [Python] Document utility to unify schemas
* [ARROW-13842](https://issues.apache.org/jira/browse/ARROW-13842) - [C++] Bump vendored date library version
* [ARROW-13843](https://issues.apache.org/jira/browse/ARROW-13843) - [C++][CI] Exercise ToString / PrettyPrint in fuzzing setup
* [ARROW-13845](https://issues.apache.org/jira/browse/ARROW-13845) - [C++] Reconcile RandomArrayGenerator::ArrayOf variants
* [ARROW-13847](https://issues.apache.org/jira/browse/ARROW-13847) - Avoid unnecessary copies of collection
* [ARROW-13849](https://issues.apache.org/jira/browse/ARROW-13849) - [C++] Add min and max aggregation functions
* [ARROW-13852](https://issues.apache.org/jira/browse/ARROW-13852) - [R] Handle Dataset schema metadata in ExecPlan
* [ARROW-13853](https://issues.apache.org/jira/browse/ARROW-13853) - [R] String to\_title, to\_lower, to\_upper kernels
* [ARROW-13855](https://issues.apache.org/jira/browse/ARROW-13855) - [C++] [Python] Add support for exporting extension types
* [ARROW-13857](https://issues.apache.org/jira/browse/ARROW-13857) - [R][CI] Remove checkbashisms download
* [ARROW-13859](https://issues.apache.org/jira/browse/ARROW-13859) - [Java] Add code coverage support
* [ARROW-13866](https://issues.apache.org/jira/browse/ARROW-13866) - [R] Implement Options for all compute kernels available via list\_compute\_functions
* [ARROW-13869](https://issues.apache.org/jira/browse/ARROW-13869) - [R] Implement options for non-bound MatchSubstringOptions kernels
* [ARROW-13871](https://issues.apache.org/jira/browse/ARROW-13871) - [C++] JSON reader can fail if a list array key is present in one chunk but not in a later chunk
* [ARROW-13874](https://issues.apache.org/jira/browse/ARROW-13874) - [R] Implement TrimOptions
* [ARROW-13883](https://issues.apache.org/jira/browse/ARROW-13883) - [Python] Allow more than numpy.array as masks when creating arrays
* [ARROW-13890](https://issues.apache.org/jira/browse/ARROW-13890) - [R] Split up test-dataset.R and test-dplyr.R
* [ARROW-13893](https://issues.apache.org/jira/browse/ARROW-13893) - [R] Make head/tail lazy on datasets and queries
* [ARROW-13897](https://issues.apache.org/jira/browse/ARROW-13897) - [Python] TimestampScalar.as\_py() and DurationScalar.as\_py() docs inaccurately describe return types
* [ARROW-13898](https://issues.apache.org/jira/browse/ARROW-13898) - [C++][Compute] Add support for string binary transforms
* [ARROW-13899](https://issues.apache.org/jira/browse/ARROW-13899) - [Ruby] Implement slicer by compute kernels
* [ARROW-13901](https://issues.apache.org/jira/browse/ARROW-13901) - [R] Implement IndexOptions
* [ARROW-13904](https://issues.apache.org/jira/browse/ARROW-13904) - [R] Implement ModeOptions
* [ARROW-13905](https://issues.apache.org/jira/browse/ARROW-13905) - [R] Implement ReplaceSliceOptions
* [ARROW-13906](https://issues.apache.org/jira/browse/ARROW-13906) - [R] Implement PartitionNthOptions
* [ARROW-13908](https://issues.apache.org/jira/browse/ARROW-13908) - [R] Implement ExtractRegexOptions
* [ARROW-13909](https://issues.apache.org/jira/browse/ARROW-13909) - [GLib] Add GArrowVarianceOptions
* [ARROW-13909](https://issues.apache.org/jira/browse/ARROW-13909) - [GLib] Add GArrowVarianceOptions
* [ARROW-13910](https://issues.apache.org/jira/browse/ARROW-13910) - [Ruby] Arrow::Table\#[]/Arrow::RecordBatch\#[] accepts Range and selectors
* [ARROW-13919](https://issues.apache.org/jira/browse/ARROW-13919) - [GLib] Add GArrowFunctionDoc
* [ARROW-13924](https://issues.apache.org/jira/browse/ARROW-13924) - [R] Bindings for stringr::str\_starts, stringr::str\_ends, base::startsWith and base::endsWith
* [ARROW-13925](https://issues.apache.org/jira/browse/ARROW-13925) - [R] Remove system installation devdocs jobs
* [ARROW-13927](https://issues.apache.org/jira/browse/ARROW-13927) - [R] Add Karl to the contributors list for the pacakge
* [ARROW-13928](https://issues.apache.org/jira/browse/ARROW-13928) - [R] Rename the version(s) tasks so that it's clearer which is which
* [ARROW-13937](https://issues.apache.org/jira/browse/ARROW-13937) - [C++][Compute] Add explicit output values to sign function and fix unary type checks
* [ARROW-13942](https://issues.apache.org/jira/browse/ARROW-13942) - [Dev] cmake\_format autotune doesn't work
* [ARROW-13944](https://issues.apache.org/jira/browse/ARROW-13944) - [C++] Bump xsimd to latest version
* [ARROW-13958](https://issues.apache.org/jira/browse/ARROW-13958) - [Python] Migrate Python ORC bindings to use new Result-based APIs
* [ARROW-13959](https://issues.apache.org/jira/browse/ARROW-13959) - [R] Update tests for extracting components from date32 objects
* [ARROW-13962](https://issues.apache.org/jira/browse/ARROW-13962) - [R] Catch up on the NEWS
* [ARROW-13963](https://issues.apache.org/jira/browse/ARROW-13963) - [Go] Shift Bitmap Reader/Writer implementations from Parquet to Arrow bituil package
* [ARROW-13964](https://issues.apache.org/jira/browse/ARROW-13964) - [Go] Remove Parquet bitmap reader/writer implementations and use the shared arrow bitutils versions
* [ARROW-13965](https://issues.apache.org/jira/browse/ARROW-13965) - [C++] dynamic\_casts in parquet TypedColumnWriterImpl impacting performance
* [ARROW-13966](https://issues.apache.org/jira/browse/ARROW-13966) - [C++] Comparison kernel(s) for decimals
* [ARROW-13967](https://issues.apache.org/jira/browse/ARROW-13967) - [Go] Implement Concatenate function for Arrays
* [ARROW-13973](https://issues.apache.org/jira/browse/ARROW-13973) - [C++] Add a SelectKSinkNode
* [ARROW-13974](https://issues.apache.org/jira/browse/ARROW-13974) - [C++] Resolve follow-up reviews for TopK/BottomK
* [ARROW-13975](https://issues.apache.org/jira/browse/ARROW-13975) - [C++][Compute] Add decimal support to round functions
* [ARROW-13977](https://issues.apache.org/jira/browse/ARROW-13977) - [Format] Clarify leap seconds and leap days for interval type
* [ARROW-13979](https://issues.apache.org/jira/browse/ARROW-13979) - [Go] Enable -race argument for Go tests
* [ARROW-13990](https://issues.apache.org/jira/browse/ARROW-13990) - [R] Bindings for round kernels
* [ARROW-13994](https://issues.apache.org/jira/browse/ARROW-13994) - [Doc][C++] Build document misses git submodule update
* [ARROW-13995](https://issues.apache.org/jira/browse/ARROW-13995) - [R] Bindings for join node
* [ARROW-13999](https://issues.apache.org/jira/browse/ARROW-13999) - [C++][CI] Make must be installed to build LZ4 on MinGW
* [ARROW-14002](https://issues.apache.org/jira/browse/ARROW-14002) - [Python] unify\_schema should accept tuples too
* [ARROW-14003](https://issues.apache.org/jira/browse/ARROW-14003) - [C++][Python] Not providing a sort\_key in the "select\_k\_unstable" kernel crashes
* [ARROW-14005](https://issues.apache.org/jira/browse/ARROW-14005) - [R] Fix tests for PartitionNthOptions so that can run on various platforms
* [ARROW-14006](https://issues.apache.org/jira/browse/ARROW-14006) - [C++][Python] Support cast of naive timestamps to strings
* [ARROW-14007](https://issues.apache.org/jira/browse/ARROW-14007) - [C++] Fix compiler warnings in decimal promotion machinery
* [ARROW-14008](https://issues.apache.org/jira/browse/ARROW-14008) - [R][Compute] ExecPlan\_run should return RecordBatchReader instead of Table
* [ARROW-14009](https://issues.apache.org/jira/browse/ARROW-14009) - [C++] Ensure SourceNode truly feeds batches to plan in parallel
* [ARROW-14012](https://issues.apache.org/jira/browse/ARROW-14012) - [Python] Update kernel categories in compute doc to match C++
* [ARROW-14013](https://issues.apache.org/jira/browse/ARROW-14013) - [C++][Docs] Instructions on installing on Fedora Linux
* [ARROW-14016](https://issues.apache.org/jira/browse/ARROW-14016) - [C++] Wrong type\_name used for directory partitioning
* [ARROW-14019](https://issues.apache.org/jira/browse/ARROW-14019) - [R] expect\_dplyr\_equal() test helper function ignores grouping
* [ARROW-14023](https://issues.apache.org/jira/browse/ARROW-14023) - [Ruby] Arrow::Table\#slice accepts Hash
* [ARROW-14025](https://issues.apache.org/jira/browse/ARROW-14025) - [R][C++] PreBuffer is not enabled when scanning parquet via exec nodes
* [ARROW-14030](https://issues.apache.org/jira/browse/ARROW-14030) - [GLib] Use arrow::Result based ORC API
* [ARROW-14031](https://issues.apache.org/jira/browse/ARROW-14031) - [Ruby] Use min and max separately
* [ARROW-14033](https://issues.apache.org/jira/browse/ARROW-14033) - [Ruby][Doc] Add macOS development guide for Red Arrow
* [ARROW-14033](https://issues.apache.org/jira/browse/ARROW-14033) - [Ruby][Doc] Add macOS development guide for Red Arrow
* [ARROW-14035](https://issues.apache.org/jira/browse/ARROW-14035) - [C++][Compute] Implement non-hash count\_distinct aggregate kernel
* [ARROW-14036](https://issues.apache.org/jira/browse/ARROW-14036) - [R] Binding for n\_distinct() with no grouping
* [ARROW-14043](https://issues.apache.org/jira/browse/ARROW-14043) - [Python] Add support for unsigned indexes in dictionary array?
* [ARROW-14044](https://issues.apache.org/jira/browse/ARROW-14044) - [R] Handle group\_by .drop parameter in summarize
* [ARROW-14049](https://issues.apache.org/jira/browse/ARROW-14049) - [C++][Java] Upgrade ORC to 1.7.0
* [ARROW-14050](https://issues.apache.org/jira/browse/ARROW-14050) - [C++] tdigest, quantile return empty arrays when nulls not skipped
* [ARROW-14052](https://issues.apache.org/jira/browse/ARROW-14052) - [C++] Add appx\_median, hash\_appx\_median functions
* [ARROW-14054](https://issues.apache.org/jira/browse/ARROW-14054) - [C++][Docs] Improve clarity of row\_conversion\_example.cpp
* [ARROW-14055](https://issues.apache.org/jira/browse/ARROW-14055) - [Docs] Add canonical url to the docs
* [ARROW-14056](https://issues.apache.org/jira/browse/ARROW-14056) - [C++][Doc] Mention ArrayData
* [ARROW-14061](https://issues.apache.org/jira/browse/ARROW-14061) - [Go] Add Cgo Arrow Memory Pool Allocator
* [ARROW-14062](https://issues.apache.org/jira/browse/ARROW-14062) - [Format] Initial arrow-internal specification of compute IR
* [ARROW-14064](https://issues.apache.org/jira/browse/ARROW-14064) - [CI] Use Debian 11
* [ARROW-14069](https://issues.apache.org/jira/browse/ARROW-14069) - [R] By default, filter out hash functions in list\_compute\_functions()
* [ARROW-14070](https://issues.apache.org/jira/browse/ARROW-14070) - [C++][CI] Remove support for VisualStudio 2015
* [ARROW-14072](https://issues.apache.org/jira/browse/ARROW-14072) - [GLib][Parquet] Add support for getting number of rows through metadata
* [ARROW-14073](https://issues.apache.org/jira/browse/ARROW-14073) - [C++] De-duplicate sort keys
* [ARROW-14084](https://issues.apache.org/jira/browse/ARROW-14084) - [GLib][Ruby][Dataset] Add support for scanning from directory
* [ARROW-14088](https://issues.apache.org/jira/browse/ARROW-14088) - [GLib][Ruby][Dataset] Add support for filter
* [ARROW-14106](https://issues.apache.org/jira/browse/ARROW-14106) - [Go][C] Implement Exporting the C data interface
* [ARROW-14107](https://issues.apache.org/jira/browse/ARROW-14107) - [R][CI] Parallelize Windows CI jobs
* [ARROW-14111](https://issues.apache.org/jira/browse/ARROW-14111) - [C++] Add extraction function support for time32/time64
* [ARROW-14116](https://issues.apache.org/jira/browse/ARROW-14116) - [C++][Docs] Consistent variable names in WriteCSV example
* [ARROW-14127](https://issues.apache.org/jira/browse/ARROW-14127) - [C++][Docs] Example of using compute function and output
* [ARROW-14128](https://issues.apache.org/jira/browse/ARROW-14128) - [Go] Implement MakeArrayFromScalar for nested types
* [ARROW-14132](https://issues.apache.org/jira/browse/ARROW-14132) - [C++] Test mixed quoting and escaping in CSV chunker test
* [ARROW-14135](https://issues.apache.org/jira/browse/ARROW-14135) - [Python] Missing Python tests for compute kernels
* [ARROW-14140](https://issues.apache.org/jira/browse/ARROW-14140) - [R] skip arrow\_binary/arrow\_large\_binary class from R metadata
* [ARROW-14143](https://issues.apache.org/jira/browse/ARROW-14143) - [IR] [C++] Add explicit cast node to IR
* [ARROW-14146](https://issues.apache.org/jira/browse/ARROW-14146) - [Dev] Update merge script to specify python3 in shebang line
* [ARROW-14150](https://issues.apache.org/jira/browse/ARROW-14150) - [C++] Skip delimiter checking in CSV chunker if quoting is false
* [ARROW-14155](https://issues.apache.org/jira/browse/ARROW-14155) - [Go] Add functions for creating fingerprints/hashes of data types and scalars
* [ARROW-14157](https://issues.apache.org/jira/browse/ARROW-14157) - [C++] Refactor Abseil build in ThirdpartyToolchain
* [ARROW-14165](https://issues.apache.org/jira/browse/ARROW-14165) - [C++] Improve table sort performance \#2
* [ARROW-14178](https://issues.apache.org/jira/browse/ARROW-14178) - [C++] Boost download location has moved
* [ARROW-14180](https://issues.apache.org/jira/browse/ARROW-14180) - [Packaging] Add support for AlmaLinux 8
* [ARROW-14189](https://issues.apache.org/jira/browse/ARROW-14189) - [Docs] Add version dropdown to the sphinx docs
* [ARROW-14191](https://issues.apache.org/jira/browse/ARROW-14191) - [C++][Dataset] Dataset writes should respect backpressure
* [ARROW-14194](https://issues.apache.org/jira/browse/ARROW-14194) - [Docs] Improve vertical spacing in the sphinx API docs
* [ARROW-14198](https://issues.apache.org/jira/browse/ARROW-14198) - [Java] Upgrade Netty and gRPC dependencies
* [ARROW-14207](https://issues.apache.org/jira/browse/ARROW-14207) - [C++] Add missing dependencies for bundled Boost targets
* [ARROW-14212](https://issues.apache.org/jira/browse/ARROW-14212) - [GLib][Ruby] Add GArrowTableConcatenateOptions
* [ARROW-14217](https://issues.apache.org/jira/browse/ARROW-14217) - [Python][CI] Add support for python 3.10
* [ARROW-14222](https://issues.apache.org/jira/browse/ARROW-14222) - [C++] Create GcsFileSystem skeleton
* [ARROW-14228](https://issues.apache.org/jira/browse/ARROW-14228) - [R] Allow for creation of nullable fields
* [ARROW-14230](https://issues.apache.org/jira/browse/ARROW-14230) - [C++] Deprecate ArrayBuilder::Advance
* [ARROW-14232](https://issues.apache.org/jira/browse/ARROW-14232) - [C++] Update crc32c dependency to 1.1.2
* [ARROW-14235](https://issues.apache.org/jira/browse/ARROW-14235) - [C++][Compute] Use a node counter as the label if no label is supplied
* [ARROW-14236](https://issues.apache.org/jira/browse/ARROW-14236) - [C++] Install GCS testbench for CI builds
* [ARROW-14239](https://issues.apache.org/jira/browse/ARROW-14239) - [R] Don't use rlang::as\_label
* [ARROW-14241](https://issues.apache.org/jira/browse/ARROW-14241) - [C++] Dataset ORC build failing in java-jars nightly build
* [ARROW-14243](https://issues.apache.org/jira/browse/ARROW-14243) - [C++] Split up vector\_sort.cc
* [ARROW-14244](https://issues.apache.org/jira/browse/ARROW-14244) - [C++] Investigate scalar\_temporal.cc compilation speed
* [ARROW-14258](https://issues.apache.org/jira/browse/ARROW-14258) - [R] Warn if an SF column is made into a table
* [ARROW-14259](https://issues.apache.org/jira/browse/ARROW-14259) - [R] converting from R vector to Array when the R vector is altrep
* [ARROW-14261](https://issues.apache.org/jira/browse/ARROW-14261) - [C++] Includes should be in alphabetical order
* [ARROW-14269](https://issues.apache.org/jira/browse/ARROW-14269) - [C++] Consolidate utf8 benchmark
* [ARROW-14274](https://issues.apache.org/jira/browse/ARROW-14274) - [C++] Upgrade vendored base64 code
* [ARROW-14284](https://issues.apache.org/jira/browse/ARROW-14284) - [C++][Python] Improve error message when trying use SyncScanner when requiring async
* [ARROW-14291](https://issues.apache.org/jira/browse/ARROW-14291) - [CI][C++] Add cpp/examples/ files to lint targets
* [ARROW-14295](https://issues.apache.org/jira/browse/ARROW-14295) - [Doc] Indicate location of archery
* [ARROW-14296](https://issues.apache.org/jira/browse/ARROW-14296) - [Go] Update flatbuf generated code
* [ARROW-14304](https://issues.apache.org/jira/browse/ARROW-14304) - [R] Update news for 6.0.0
* [ARROW-14309](https://issues.apache.org/jira/browse/ARROW-14309) - [Python] CompressedInputStream doesn't support str or file objects
* [ARROW-14317](https://issues.apache.org/jira/browse/ARROW-14317) - [Doc] Update implementation status
* [ARROW-14326](https://issues.apache.org/jira/browse/ARROW-14326) - [Docs] Add C/GLib and Ruby to C Data/Stream interface supported libraries
* [ARROW-14327](https://issues.apache.org/jira/browse/ARROW-14327) - [Release] Remove conda-\* from packaging group
* [ARROW-14335](https://issues.apache.org/jira/browse/ARROW-14335) - [GLib][Ruby] Add support for expression
* [ARROW-14337](https://issues.apache.org/jira/browse/ARROW-14337) - [C++] Arrow doesn't build on M1 when SIMD acceleration is enabled
* [ARROW-14341](https://issues.apache.org/jira/browse/ARROW-14341) - [C++] Refine decimal benchmark
* [ARROW-14343](https://issues.apache.org/jira/browse/ARROW-14343) - [Packaging][Python] Enable NEON SIMD optimization for M1 wheels
* [ARROW-14345](https://issues.apache.org/jira/browse/ARROW-14345) - [C++] Implement streaming reads for GCS FileSystem
* [ARROW-14348](https://issues.apache.org/jira/browse/ARROW-14348) - [R] add group\_vars.RecordBatchReader method
* [ARROW-14349](https://issues.apache.org/jira/browse/ARROW-14349) - [IR] Remove RelBase
* [ARROW-14358](https://issues.apache.org/jira/browse/ARROW-14358) - Update CMake options in documentation
* [ARROW-14361](https://issues.apache.org/jira/browse/ARROW-14361) - [C++] Define a DEFAULT value for ARROW\_SIMD\_LEVEL
* [ARROW-14364](https://issues.apache.org/jira/browse/ARROW-14364) - [CI][C++] Support LLVM 13
* [ARROW-14368](https://issues.apache.org/jira/browse/ARROW-14368) - [CI] ubuntu-16.04 isn't available on Azure Pipelines
* [ARROW-14369](https://issues.apache.org/jira/browse/ARROW-14369) - [C++][Python] Failed to build with g++ 4.8.5
* [ARROW-14386](https://issues.apache.org/jira/browse/ARROW-14386) - [Packaging][Java] devtoolset is upgraded to 10 in the manylinux2014 image
* [ARROW-14387](https://issues.apache.org/jira/browse/ARROW-14387) - [Release][Ruby] Check Homebrew/MSYS2 package version before releasing
* [ARROW-14396](https://issues.apache.org/jira/browse/ARROW-14396) - [R][Doc] Remove relic note in write\_dataset that columns cannot be renamed
* [ARROW-14400](https://issues.apache.org/jira/browse/ARROW-14400) - [Go] Equals and ApproxEquals for Tables and Chunked Arrays
* [ARROW-14401](https://issues.apache.org/jira/browse/ARROW-14401) - [C++] Bundled crc32c 's include path is wrong
* [ARROW-14402](https://issues.apache.org/jira/browse/ARROW-14402) - [Release][Yum] Signing RPM is failed
* [ARROW-14404](https://issues.apache.org/jira/browse/ARROW-14404) - [Release][APT] Skip arm64 Debian GNU/Linux bookwarm verification
* [ARROW-14408](https://issues.apache.org/jira/browse/ARROW-14408) - [Packaging][Crossbow] Option for skipping artifact pattern validation
* [ARROW-14410](https://issues.apache.org/jira/browse/ARROW-14410) - [Python][Packaging] Use numpy 1.21.3 to build python 3.10 wheels for macOS and windows
* [ARROW-14452](https://issues.apache.org/jira/browse/ARROW-14452) - [Release][JS] Update Javascript testing
* [PARQUET-490](https://issues.apache.org/jira/browse/PARQUET-490) - [C++] Incorporate DELTA\_BINARY\_PACKED value encoder into library and add unit tests



# Apache Arrow 5.0.0 (2021-07-28)

## Bug Fixes

* [ARROW-6189](https://issues.apache.org/jira/browse/ARROW-6189) - [Rust] [Parquet] Plain encoded boolean column chunks limited to 2048 values
* [ARROW-6312](https://issues.apache.org/jira/browse/ARROW-6312) - [C++] Declare required Libs.private in arrow.pc package config
* [ARROW-7948](https://issues.apache.org/jira/browse/ARROW-7948) - [Go][Integration] Decimal integration failures
* [ARROW-9594](https://issues.apache.org/jira/browse/ARROW-9594) - [Python] DictionaryArray.to\_numpy does not correctly convert null indexes to null values
* [ARROW-10910](https://issues.apache.org/jira/browse/ARROW-10910) - [Python] Segmentation Fault when None given to read\_table with legacy dataset
* [ARROW-10958](https://issues.apache.org/jira/browse/ARROW-10958) - [GLib] "Nested data conversions not implemented" through glib, but not through pyarrow
* [ARROW-11077](https://issues.apache.org/jira/browse/ARROW-11077) - [Rust] ParquetFileArrowReader panicks when trying to read nested list
* [ARROW-11146](https://issues.apache.org/jira/browse/ARROW-11146) - [CI][Python] Failing conda-python-3.8-jpype Nightly Build
* [ARROW-11161](https://issues.apache.org/jira/browse/ARROW-11161) - [Python][C++] S3Filesystem: file Content-Type not set correctly?
* [ARROW-11633](https://issues.apache.org/jira/browse/ARROW-11633) - [CI] [Documentation] Maven default skin not found
* [ARROW-11780](https://issues.apache.org/jira/browse/ARROW-11780) - [C++][Python] StructArray.from\_arrays() crashes Python interpreter
* [ARROW-11908](https://issues.apache.org/jira/browse/ARROW-11908) - [Rust] Intermittent Flight integration test failures
* [ARROW-12007](https://issues.apache.org/jira/browse/ARROW-12007) - [C++] Loading parquet file returns "Invalid UTF8 payload" error
* [ARROW-12055](https://issues.apache.org/jira/browse/ARROW-12055) - [R] is.na() evaluates to FALSE on Arrow NaN values
* [ARROW-12096](https://issues.apache.org/jira/browse/ARROW-12096) - [Python][C++] Pyarrow Parquet reader overflows INT96 timestamps when converting to Arrow Array (timestamp[ns])
* [ARROW-12122](https://issues.apache.org/jira/browse/ARROW-12122) - [Python] Cannot install via pip M1 mac
* [ARROW-12142](https://issues.apache.org/jira/browse/ARROW-12142) - [Python] undefined symbol: \_ZN5arrow6StatusC1ENS\_10StatusCodeERKNSt7\_\_cxx1112basic\_stringIcSt11char\_traitsIcESaIcEEE
* [ARROW-12150](https://issues.apache.org/jira/browse/ARROW-12150) - [Python] Bad type inference of mixed-precision Decimals
* [ARROW-12232](https://issues.apache.org/jira/browse/ARROW-12232) - [Rust][Datafusion] Error with CAST: Unsupported SQL type Time
* [ARROW-12240](https://issues.apache.org/jira/browse/ARROW-12240) - [Python] invalid-offsetof warning from apple clang-12
* [ARROW-12377](https://issues.apache.org/jira/browse/ARROW-12377) - [Doc][Java] Java doc build broken
* [ARROW-12407](https://issues.apache.org/jira/browse/ARROW-12407) - [Python] Deprecation warning when building PyArrow
* [ARROW-12431](https://issues.apache.org/jira/browse/ARROW-12431) - [Python] pa.array mask inverted when type is binary and value to be converted is numpy array
* [ARROW-12472](https://issues.apache.org/jira/browse/ARROW-12472) - [Python] read\_table fails when passing a PEP519 filesystem object
* [ARROW-12482](https://issues.apache.org/jira/browse/ARROW-12482) - [Doc][Python] Mention CSVStreamingReader pitfalls with type inference
* [ARROW-12491](https://issues.apache.org/jira/browse/ARROW-12491) - [Packaging] Required dependency on LZ4 \>= 1.8 missing from CentOS RPM packages
* [ARROW-12503](https://issues.apache.org/jira/browse/ARROW-12503) - [C++] Ensure using "lib/" for jemalloc's library directory
* [ARROW-12508](https://issues.apache.org/jira/browse/ARROW-12508) - [R] expect\_as\_vector implementation causes test failure on R <= 3.3  and variables defined outside of test\_that break build when no arrow install
* [ARROW-12543](https://issues.apache.org/jira/browse/ARROW-12543) - [CI][Python] Failing conda-python-3.9 Nightly Build
* [ARROW-12568](https://issues.apache.org/jira/browse/ARROW-12568) - [Python][C++] Segfault when casting a sliced ListArray of int64 in v4.0.0
* [ARROW-12569](https://issues.apache.org/jira/browse/ARROW-12569) - [R] [CI] Run revdep in CI
* [ARROW-12570](https://issues.apache.org/jira/browse/ARROW-12570) - [JS] Fix issues that blocked the v4.0.0 release
* [ARROW-12579](https://issues.apache.org/jira/browse/ARROW-12579) - [Python] Pyarrow 4.0.0 dependency numpy 1.19.4 throws errors on Apple silicon/M1 compilation
* [ARROW-12589](https://issues.apache.org/jira/browse/ARROW-12589) - [C++] Compiling on windows doesn't work when -DARROW\_WITH\_BACKTRACE=OFF
* [ARROW-12601](https://issues.apache.org/jira/browse/ARROW-12601) - [R][Packaging] Fix pkg-config check in r/configure
* [ARROW-12604](https://issues.apache.org/jira/browse/ARROW-12604) - [R][Packaging] Dataset, Parquet off in autobrew and CRAN Mac builds
* [ARROW-12605](https://issues.apache.org/jira/browse/ARROW-12605) - [Documentation] Repair line numbers in dataset.rst
* [ARROW-12606](https://issues.apache.org/jira/browse/ARROW-12606) - [C++] Quantile and Mode functions failing on arrays with offset
* [ARROW-12610](https://issues.apache.org/jira/browse/ARROW-12610) - [C++] Skip TestS3FSGeneric TestDeleteDir and TestDeleteDirContents on windows as they are flaky
* [ARROW-12611](https://issues.apache.org/jira/browse/ARROW-12611) - [CI][Python] Nightly test-conda-python-pandas-0.24 is failing due to numpy compat issue
* [ARROW-12613](https://issues.apache.org/jira/browse/ARROW-12613) - [Python] AttributeError when comparing a Scalar with None
* [ARROW-12614](https://issues.apache.org/jira/browse/ARROW-12614) - [C++][Compute] Revert support for Tables in ExecuteScalarExpression
* [ARROW-12617](https://issues.apache.org/jira/browse/ARROW-12617) - [Python] pyarrow.orc.write\_table signature reverses that of pyarrow.parquet.write\_table
* [ARROW-12620](https://issues.apache.org/jira/browse/ARROW-12620) - [C++] Dataset writing can only include projected columns if input columns are also included
* [ARROW-12622](https://issues.apache.org/jira/browse/ARROW-12622) - [Python] Segfault when reading CSV inside Flight server
* [ARROW-12630](https://issues.apache.org/jira/browse/ARROW-12630) - [Dev][Integration] conda-integration docker build fails
* [ARROW-12639](https://issues.apache.org/jira/browse/ARROW-12639) - [CI][Archery] Archery build fails to create branch
* [ARROW-12640](https://issues.apache.org/jira/browse/ARROW-12640) - [C++] Fix errors from VS 2019 in cpp/src/parquet/types.h
* [ARROW-12642](https://issues.apache.org/jira/browse/ARROW-12642) - [R] LIBARROW\_MINIMAL, LIBARROW\_DOWNLOAD, NOT\_CRAN env vars should not be case-sensitive
* [ARROW-12644](https://issues.apache.org/jira/browse/ARROW-12644) - [C++][Dataset] Support reading date/time-partitioned datasets accounting for URL encoding (Spark)
* [ARROW-12646](https://issues.apache.org/jira/browse/ARROW-12646) - [C++][CI][Packaging][Python] Bump vcpkg version to its latest release
* [ARROW-12663](https://issues.apache.org/jira/browse/ARROW-12663) - [C++] segfault when arrow header is compiled with nvcc 11.2
* [ARROW-12668](https://issues.apache.org/jira/browse/ARROW-12668) - [C++][Dataset] CountRows occasionally segfaulting
* [ARROW-12670](https://issues.apache.org/jira/browse/ARROW-12670) - [C++] extract\_regex gives bizarre behavior after nulls or non-matches
* [ARROW-12672](https://issues.apache.org/jira/browse/ARROW-12672) - [C++] Segfault casting result of "fill\_null()" (not bitmap but unknown null\_count)
* [ARROW-12679](https://issues.apache.org/jira/browse/ARROW-12679) - [Java] JDBC adapter does not preserve SQL-nullability
* [ARROW-12684](https://issues.apache.org/jira/browse/ARROW-12684) - [Go][Flight] Fix nil dereference in error case
* [ARROW-12708](https://issues.apache.org/jira/browse/ARROW-12708) - [C++] Valgrind errors when calling negate\_checked
* [ARROW-12729](https://issues.apache.org/jira/browse/ARROW-12729) - [R] Fix length method for Table, RecordBatch
* [ARROW-12746](https://issues.apache.org/jira/browse/ARROW-12746) - [Go][Flight] Client Auth handler overwrites outgoing metadata
* [ARROW-12756](https://issues.apache.org/jira/browse/ARROW-12756) - [C++] MSVC build fails with latest gtest from vcpkg
* [ARROW-12757](https://issues.apache.org/jira/browse/ARROW-12757) - [Dev][Archery] Warning about RUST variable in "archery docker run"
* [ARROW-12762](https://issues.apache.org/jira/browse/ARROW-12762) - [Python] ListType doesn't preserve field name after pickle and unpickle
* [ARROW-12769](https://issues.apache.org/jira/browse/ARROW-12769) - [Python] Negative out of range slices yield invalid arrays
* [ARROW-12771](https://issues.apache.org/jira/browse/ARROW-12771) - [C++] Arrow compute hash\_count skips following chunked arrays in streaming execution
* [ARROW-12772](https://issues.apache.org/jira/browse/ARROW-12772) - [CI] Merge script test fails due to missing dependency
* [ARROW-12773](https://issues.apache.org/jira/browse/ARROW-12773) - [Docs] Clarify Java support for ORC and Parquet via JNI bindings
* [ARROW-12774](https://issues.apache.org/jira/browse/ARROW-12774) - [C++][Compute] replace\_substring\_regex() creates invalid arrays =\> crash
* [ARROW-12776](https://issues.apache.org/jira/browse/ARROW-12776) - [Archery][Integration] Fix decimal case generation in write\_js\_test\_json
* [ARROW-12779](https://issues.apache.org/jira/browse/ARROW-12779) - [Python][FlightRPC] Flight server segfaults with certain data
* [ARROW-12780](https://issues.apache.org/jira/browse/ARROW-12780) - [CI][C++] MinGW builds failing when trying to build Gandiva
* [ARROW-12790](https://issues.apache.org/jira/browse/ARROW-12790) - [Python] Cannot read from HDFS with blanks in path names
* [ARROW-12793](https://issues.apache.org/jira/browse/ARROW-12793) - [Python] PYARROW\_BUILD\_TYPE=Debug does not work correctly
* [ARROW-12797](https://issues.apache.org/jira/browse/ARROW-12797) - [JS] Update readme with new links and remove outdated examples
* [ARROW-12798](https://issues.apache.org/jira/browse/ARROW-12798) - [JS] Use == null Comparison
* [ARROW-12799](https://issues.apache.org/jira/browse/ARROW-12799) - [JS] Use Nullish Coalescing Operator (??) For Defaults
* [ARROW-12804](https://issues.apache.org/jira/browse/ARROW-12804) - [C++] Array methods IsNull and IsValid is confused for NullType
* [ARROW-12807](https://issues.apache.org/jira/browse/ARROW-12807) - [C++] Fix merge conflicts with Future refactor/async IPC
* [ARROW-12838](https://issues.apache.org/jira/browse/ARROW-12838) - [Java][Gandiva] Fix JNI CI test for Gandiva
* [ARROW-12842](https://issues.apache.org/jira/browse/ARROW-12842) - [Java][FlightRPC] Error metadata from FlightStatusException is not propagated to client
* [ARROW-12850](https://issues.apache.org/jira/browse/ARROW-12850) - [R] is.nan() evaluates to null on Arrow null values
* [ARROW-12854](https://issues.apache.org/jira/browse/ARROW-12854) - [Dev][Release] Windows wheel verification script fails to download artifacts
* [ARROW-12857](https://issues.apache.org/jira/browse/ARROW-12857) - [C++] hash\_aggregate\_test not building on master
* [ARROW-12864](https://issues.apache.org/jira/browse/ARROW-12864) - [C++] Remove needless out argument from arrow::internal::InvertBitmap
* [ARROW-12865](https://issues.apache.org/jira/browse/ARROW-12865) - [C++][Python] Python FlightRPC server cannot find RE2 symbols
* [ARROW-12882](https://issues.apache.org/jira/browse/ARROW-12882) - [C++][Gandiva] Fix behavior of convevrt\_replace function for empty replacement char
* [ARROW-12887](https://issues.apache.org/jira/browse/ARROW-12887) - [CI] AppVeyor pip install failure during setup
* [ARROW-12906](https://issues.apache.org/jira/browse/ARROW-12906) - [Python] \`fill\_null\` called with a null value seg faults on non fixed-sized types.
* [ARROW-12907](https://issues.apache.org/jira/browse/ARROW-12907) - [Java] Memory leak possible when exception reading from channel happens
* [ARROW-12911](https://issues.apache.org/jira/browse/ARROW-12911) - [Python] Export scalar aggregate options to pc.sum (sum of zero rows gives null; should give 0)
* [ARROW-12917](https://issues.apache.org/jira/browse/ARROW-12917) - [C++][R][pyarrow] Failure importing some decimal types using the C data interface
* [ARROW-12918](https://issues.apache.org/jira/browse/ARROW-12918) - [C++] Build errors with Visual Studio 16.10.31321.278
* [ARROW-12919](https://issues.apache.org/jira/browse/ARROW-12919) - [Developer Tools] Crossbow comment bot failing to react to comments
* [ARROW-12935](https://issues.apache.org/jira/browse/ARROW-12935) - [C++][CI] Compiler error on some clang versions
* [ARROW-12941](https://issues.apache.org/jira/browse/ARROW-12941) - [C++] csv reader skip\_row does not properly update num\_rows\_seen
* [ARROW-12942](https://issues.apache.org/jira/browse/ARROW-12942) - [C++][Compute] The result of Arrow compute hash\_min\_max is incorrect if there are new groups in the subsequent chunks
* [ARROW-12956](https://issues.apache.org/jira/browse/ARROW-12956) - [C++] Fix crash on Parquet file (OSS-Fuzz)
* [ARROW-12969](https://issues.apache.org/jira/browse/ARROW-12969) - [C++] match\_substring doesn't match empty needle to empty haystack
* [ARROW-12974](https://issues.apache.org/jira/browse/ARROW-12974) - [R] test-r-without-arrow build fails because of example requiring Arrow
* [ARROW-12983](https://issues.apache.org/jira/browse/ARROW-12983) - [C++][Python] Converter::Extend gets stuck in infinite loop causing OOM if values don't fit in single chunk
* [ARROW-12987](https://issues.apache.org/jira/browse/ARROW-12987) - [CI] test-ubuntu-18.04 nightly builds are failing due to Gandiva "TestUpper" test failure
* [ARROW-12988](https://issues.apache.org/jira/browse/ARROW-12988) - [CI] The kartothek nightly integration build is failing (test\_update\_dataset\_from\_ddf\_empty)
* [ARROW-12988](https://issues.apache.org/jira/browse/ARROW-12988) - [CI] The kartothek nightly integration build is failing (test\_update\_dataset\_from\_ddf\_empty)
* [ARROW-12989](https://issues.apache.org/jira/browse/ARROW-12989) - [CI] "Dev PR" jobs undully cancelled
* [ARROW-12991](https://issues.apache.org/jira/browse/ARROW-12991) - [CI] Travis ARM builds often crash
* [ARROW-12993](https://issues.apache.org/jira/browse/ARROW-12993) - [Python] Address boundary error with invalid Feather file and stackprinter
* [ARROW-12995](https://issues.apache.org/jira/browse/ARROW-12995) - [C++] CSV reader should validate options
* [ARROW-12998](https://issues.apache.org/jira/browse/ARROW-12998) - [C++] Datasets needs dependency on xsimd
* [ARROW-13001](https://issues.apache.org/jira/browse/ARROW-13001) - [Go] Build failure in parquet/internal/bmi on s390x
* [ARROW-13003](https://issues.apache.org/jira/browse/ARROW-13003) - [C++] unaligned access in compute/exec/ cc files
* [ARROW-13008](https://issues.apache.org/jira/browse/ARROW-13008) - [C++] Deprecation warning when compiling minimal example
* [ARROW-13010](https://issues.apache.org/jira/browse/ARROW-13010) - [C++][Compute] Support outputting to slices from kleene kernels
* [ARROW-13018](https://issues.apache.org/jira/browse/ARROW-13018) - [C++][Docs] Use consistent terminology for nulls (min\_count) in scalar aggregate kernels
* [ARROW-13026](https://issues.apache.org/jira/browse/ARROW-13026) - [C++][CI] s390x job setup fails
* [ARROW-13037](https://issues.apache.org/jira/browse/ARROW-13037) - [R] Incorrect param when creating Expression crashes R
* [ARROW-13039](https://issues.apache.org/jira/browse/ARROW-13039) - [R] Fix error message handling
* [ARROW-13041](https://issues.apache.org/jira/browse/ARROW-13041) - [C++] Unary kernels can leave uninitialized data under null entries
* [ARROW-13046](https://issues.apache.org/jira/browse/ARROW-13046) - [Release] JS package failing test prior to publish
* [ARROW-13048](https://issues.apache.org/jira/browse/ARROW-13048) - [C++] S3FileSystem fails moving filepaths containing = or +
* [ARROW-13053](https://issues.apache.org/jira/browse/ARROW-13053) - [Python] Build fails on MacOS Big Sur using homebrewed Arrow libraries
* [ARROW-13069](https://issues.apache.org/jira/browse/ARROW-13069) - [Website] Add Daniël to committer list
* [ARROW-13073](https://issues.apache.org/jira/browse/ARROW-13073) - [Developer] archery benchmark list: unexpected keyword 'benchmark\_filter'
* [ARROW-13080](https://issues.apache.org/jira/browse/ARROW-13080) - [Release] Generate the API docs in ubuntu 20.10
* [ARROW-13083](https://issues.apache.org/jira/browse/ARROW-13083) - [Python] Wrong SCM version detection both in setup.py and crossbow
* [ARROW-13085](https://issues.apache.org/jira/browse/ARROW-13085) - [Python] Apache Arrow minimal cpp build segfaults with pyarrow libs
* [ARROW-13090](https://issues.apache.org/jira/browse/ARROW-13090) - [Python] Test failure with ffspec 2021.6.0
* [ARROW-13104](https://issues.apache.org/jira/browse/ARROW-13104) - [C++] ByteStreamSplit implementation uses invalid pointer cast
* [ARROW-13108](https://issues.apache.org/jira/browse/ARROW-13108) - [Python] Pyarrow 4.0.0 crashes upon import on macOS 10.13.6
* [ARROW-13116](https://issues.apache.org/jira/browse/ARROW-13116) - [R] Test for RecordBatchReader to C-interface fails on arrow-r-minimal due to missing dependencies
* [ARROW-13125](https://issues.apache.org/jira/browse/ARROW-13125) - [R] Throw error when 2+ args passed to desc() in arrange()
* [ARROW-13128](https://issues.apache.org/jira/browse/ARROW-13128) - [C\#] TimestampArray conversion logic for nano and micro is wrong
* [ARROW-13135](https://issues.apache.org/jira/browse/ARROW-13135) - [C++] Fix Status propagation in END\_PARQUET\_CATCH\_EXCEPTIONS
* [ARROW-13139](https://issues.apache.org/jira/browse/ARROW-13139) - [C++] ReadaheadGenerator cannot be safely copied/moved
* [ARROW-13145](https://issues.apache.org/jira/browse/ARROW-13145) - [C++][CI] Flight test crashes on MinGW
* [ARROW-13148](https://issues.apache.org/jira/browse/ARROW-13148) - [Dev][Archery] Crossbow build submission fails
* [ARROW-13153](https://issues.apache.org/jira/browse/ARROW-13153) - [C++] \`parquet\_dataset\` loses ordering of files in \`\_metadata\`
* [ARROW-13154](https://issues.apache.org/jira/browse/ARROW-13154) - [C++] Unions can not have 126 and 127 as type\_codes
* [ARROW-13169](https://issues.apache.org/jira/browse/ARROW-13169) - [R] [C++] sorted partition keys can cause issues
* [ARROW-13173](https://issues.apache.org/jira/browse/ARROW-13173) - [C++] TestAsyncUtil.ReadaheadFailed asserts occasionally
* [ARROW-13187](https://issues.apache.org/jira/browse/ARROW-13187) - [c++][python] Possibly memory not deallocated when reading in CSV
* [ARROW-13189](https://issues.apache.org/jira/browse/ARROW-13189) - [R] Disable row-level metadata application on datasets
* [ARROW-13203](https://issues.apache.org/jira/browse/ARROW-13203) - [R] Fix optional component checks causing failures
* [ARROW-13207](https://issues.apache.org/jira/browse/ARROW-13207) - [Python][Doc] Dataset documentation still suggests deprecated scan method as the preferred iterative approach
* [ARROW-13216](https://issues.apache.org/jira/browse/ARROW-13216) - [R] Type checks test fails with rtools35
* [ARROW-13217](https://issues.apache.org/jira/browse/ARROW-13217) - [C++][Gandiva] Correct convert\_replace function for invalid chars on string beginning
* [ARROW-13223](https://issues.apache.org/jira/browse/ARROW-13223) - [C++][CI] Fix thread sanitizer failures
* [ARROW-13225](https://issues.apache.org/jira/browse/ARROW-13225) - [Go][Flight] Implement Custom Middleware Interface and Enable Integration Tests
* [ARROW-13229](https://issues.apache.org/jira/browse/ARROW-13229) - [Python] ascii\_trim, ascii\_ltrim and ascii\_rtrim lack options
* [ARROW-13239](https://issues.apache.org/jira/browse/ARROW-13239) - [Doc][Python] Dataset.head function doesn't mention required argument
* [ARROW-13243](https://issues.apache.org/jira/browse/ARROW-13243) - [R] altrep function call in R 3.5
* [ARROW-13246](https://issues.apache.org/jira/browse/ARROW-13246) - [C++] CSV skip\_rows\_after\_names can discard data prematurally
* [ARROW-13249](https://issues.apache.org/jira/browse/ARROW-13249) - [Java][CI] Consistent timeout in the Java JNI build
* [ARROW-13253](https://issues.apache.org/jira/browse/ARROW-13253) - [C++][FlightRPC] Segfault when sending record batch \>2GB
* [ARROW-13254](https://issues.apache.org/jira/browse/ARROW-13254) - [Python] Processes killed and semaphore objects leaked when reading pandas data
* [ARROW-13265](https://issues.apache.org/jira/browse/ARROW-13265) - [R] cli valgrind errors in nightlies
* [ARROW-13266](https://issues.apache.org/jira/browse/ARROW-13266) - [JS] Improve benchmark names & add suite name to json
* [ARROW-13281](https://issues.apache.org/jira/browse/ARROW-13281) - [C++][Gandiva] Error on timestampDiffMonth function behavior for negative diff values
* [ARROW-13284](https://issues.apache.org/jira/browse/ARROW-13284) - [C++] Wrong pkg\_check\_modules() option name
* [ARROW-13288](https://issues.apache.org/jira/browse/ARROW-13288) - [Python] Missing default values of kernel options in PyArrow
* [ARROW-13290](https://issues.apache.org/jira/browse/ARROW-13290) - Compilation fails on clang-12 and gcc-11 due to missing include
* [ARROW-13305](https://issues.apache.org/jira/browse/ARROW-13305) - [C++] Unable to install nightly on Ubuntu 21.04 due to CSV options
* [ARROW-13315](https://issues.apache.org/jira/browse/ARROW-13315) - [R] Wrap r\_task\_group includes with ARROW\_R\_WITH\_ARROW checking
* [ARROW-13321](https://issues.apache.org/jira/browse/ARROW-13321) - [C++][Python] MakeArrayFromScalar doesn't work for FixedSizeBinaryType
* [ARROW-13324](https://issues.apache.org/jira/browse/ARROW-13324) - [R] Typo in bindings for utf8\_reverse and ascii\_reverse
* [ARROW-13332](https://issues.apache.org/jira/browse/ARROW-13332) - [C++] TSAN failure in TestAsyncUtil.ReadaheadFailed
* [ARROW-13341](https://issues.apache.org/jira/browse/ARROW-13341) - [C++] Segfault in arrow-compute-plan-test ExecPlanExecution.SourceScalarAggSink
* [ARROW-13350](https://issues.apache.org/jira/browse/ARROW-13350) - [Python][CI] conda-python-3.7-pandas-0.24 nightly build failing in test\_extract\_datetime\_components
* [ARROW-13352](https://issues.apache.org/jira/browse/ARROW-13352) - [C++] Valgrind failure in case\_when kernel
* [ARROW-13353](https://issues.apache.org/jira/browse/ARROW-13353) - [Documentation] Build failing with sphinx.util.cfamily.DefinitionError
* [ARROW-13360](https://issues.apache.org/jira/browse/ARROW-13360) - [C++] Missing dependencies in C++ thirdparty offline dependencies versions.txt
* [ARROW-13363](https://issues.apache.org/jira/browse/ARROW-13363) - [R] is.nan() errors on non-floating point data
* [ARROW-13368](https://issues.apache.org/jira/browse/ARROW-13368) - [C++][Doc] Rename project to make\_struct in docs
* [ARROW-13381](https://issues.apache.org/jira/browse/ARROW-13381) - [C++] ArrayFromJSON doesn't work for float value dictionary type
* [ARROW-13382](https://issues.apache.org/jira/browse/ARROW-13382) - [C++] Aggregation over scalars fails autobrew R job
* [ARROW-13384](https://issues.apache.org/jira/browse/ARROW-13384) - [C++] Specify minimum required zstd version in cmake
* [ARROW-13391](https://issues.apache.org/jira/browse/ARROW-13391) - [C++] CSV streaming reader does not include same error information as table reader
* [ARROW-13417](https://issues.apache.org/jira/browse/ARROW-13417) - [C++] The merged generator can sometimes pull from source sync-reentrant
* [ARROW-13419](https://issues.apache.org/jira/browse/ARROW-13419) - [JS] Fix perf tests
* [ARROW-13428](https://issues.apache.org/jira/browse/ARROW-13428) - [C++][Flight] -lssl is missing with bundled gRPC and system shared OpenSSL
* [ARROW-13431](https://issues.apache.org/jira/browse/ARROW-13431) - [Release] Bump go version to 1.15; don't verify rust source anymore
* [ARROW-13432](https://issues.apache.org/jira/browse/ARROW-13432) - [Release] Fix ssh connection to the binary uploader container


## New Features and Improvements

* [ARROW-2665](https://issues.apache.org/jira/browse/ARROW-2665) - [Python/C++] Add index() method to find first occurence of Python scalar
* [ARROW-3014](https://issues.apache.org/jira/browse/ARROW-3014) - [C++] Minimal writer adapter for ORC file format
* [ARROW-3316](https://issues.apache.org/jira/browse/ARROW-3316) - [R] Multi-threaded conversion from R data.frame to Arrow table / record batch
* [ARROW-5385](https://issues.apache.org/jira/browse/ARROW-5385) - [Go] implement EXTENSION datatype
* [ARROW-5640](https://issues.apache.org/jira/browse/ARROW-5640) - [Go] implement Map array
* [ARROW-6513](https://issues.apache.org/jira/browse/ARROW-6513) - [CI] The conda environment files arrow/ci/conda\_env\_\*.yml should have .txt extension
* [ARROW-6513](https://issues.apache.org/jira/browse/ARROW-6513) - [CI] The conda environment files arrow/ci/conda\_env\_\*.yml should have .txt extension
* [ARROW-7001](https://issues.apache.org/jira/browse/ARROW-7001) - [C++] Develop threading APIs to accommodate nested parallelism
* [ARROW-7114](https://issues.apache.org/jira/browse/ARROW-7114) - [JS][CI] NodeJS build fails on Github Actions Windows node
* [ARROW-7252](https://issues.apache.org/jira/browse/ARROW-7252) - [Rust] [Parquet] Reading UTF-8/JSON/ENUM field results in a lot of vec allocation
* [ARROW-7396](https://issues.apache.org/jira/browse/ARROW-7396) - [Format] Register media types (MIME types) for Apache Arrow formats to IANA
* [ARROW-8421](https://issues.apache.org/jira/browse/ARROW-8421) - [Rust] [Parquet] Implement parquet writer
* [ARROW-8459](https://issues.apache.org/jira/browse/ARROW-8459) - [Dev][Archery] Use a more recent cmake-format
* [ARROW-8527](https://issues.apache.org/jira/browse/ARROW-8527) - [C++][CSV] Add support for ReadOptions::skip\_rows \>= block\_size
* [ARROW-8655](https://issues.apache.org/jira/browse/ARROW-8655) - [C++][Dataset][Python][R] Preserve partitioning information for a discovered Dataset
* [ARROW-8676](https://issues.apache.org/jira/browse/ARROW-8676) - [Rust] Create implementation of IPC RecordBatch body buffer compression from ARROW-300
* [ARROW-9054](https://issues.apache.org/jira/browse/ARROW-9054) - [C++] Add ScalarAggregateOptions
* [ARROW-9056](https://issues.apache.org/jira/browse/ARROW-9056) - [C++] Support scalar aggregation over scalars
* [ARROW-9140](https://issues.apache.org/jira/browse/ARROW-9140) - [R] Zero-copy Arrow to R where possible
* [ARROW-9295](https://issues.apache.org/jira/browse/ARROW-9295) - [Archery] Support rust clippy in the lint command
* [ARROW-9299](https://issues.apache.org/jira/browse/ARROW-9299) - [Python] Expose ORC metadata() in Python ORCFile
* [ARROW-9313](https://issues.apache.org/jira/browse/ARROW-9313) - [Rust] Use feature enum
* [ARROW-9421](https://issues.apache.org/jira/browse/ARROW-9421) - [C++][Parquet] Redundancies SchemaManifest::GetFieldIndices
* [ARROW-9430](https://issues.apache.org/jira/browse/ARROW-9430) - [C++/Python] Kernel for SetItem(BooleanArray, values)
* [ARROW-9697](https://issues.apache.org/jira/browse/ARROW-9697) - [C++][Dataset] num\_rows method for Dataset/Scanner
* [ARROW-10031](https://issues.apache.org/jira/browse/ARROW-10031) - [Java] Support Java benchmark in Archery
* [ARROW-10115](https://issues.apache.org/jira/browse/ARROW-10115) - [C++] CSV empty quoted string is treated as NULL
* [ARROW-10316](https://issues.apache.org/jira/browse/ARROW-10316) - [Python] Consider using \_\_wrapped\_\_ for compute function introspection
* [ARROW-10391](https://issues.apache.org/jira/browse/ARROW-10391) - [Rust] [Parquet] Nested Arrow reader
* [ARROW-10440](https://issues.apache.org/jira/browse/ARROW-10440) - [C++][Dataset][Python] Add a callback to visit file writers just before Finish()
* [ARROW-10550](https://issues.apache.org/jira/browse/ARROW-10550) - [Rust] [Parquet] Write nested types (struct, list)
* [ARROW-10557](https://issues.apache.org/jira/browse/ARROW-10557) - [C++] Add scalar string slicing/substring extract kernel
* [ARROW-10640](https://issues.apache.org/jira/browse/ARROW-10640) - [C++] An "if\_else" kernel to combine two arrays based on a mask
* [ARROW-10658](https://issues.apache.org/jira/browse/ARROW-10658) - [Python][Packaging] Wheel builds for Apple Silicon
* [ARROW-10675](https://issues.apache.org/jira/browse/ARROW-10675) - [C++][Python] Support AWS S3 Web identity credentials
* [ARROW-10797](https://issues.apache.org/jira/browse/ARROW-10797) - [C++] Investigate faster random generation for tests and benchmarks
* [ARROW-10926](https://issues.apache.org/jira/browse/ARROW-10926) - [Rust] Add parquet reader / writer for decimal types
* [ARROW-10959](https://issues.apache.org/jira/browse/ARROW-10959) - [C++] Add scalar string join kernel
* [ARROW-11061](https://issues.apache.org/jira/browse/ARROW-11061) - [Rust] Validate array properties against schema
* [ARROW-11173](https://issues.apache.org/jira/browse/ARROW-11173) - Add Map type as reader / writer in FieldReader / FieldWriter
* [ARROW-11199](https://issues.apache.org/jira/browse/ARROW-11199) - [C++][Python] Fix the unit tests for the ORC reader
* [ARROW-11206](https://issues.apache.org/jira/browse/ARROW-11206) - [C++][Compute][Python] Rename "project" kernel to "make\_struct"
* [ARROW-11342](https://issues.apache.org/jira/browse/ARROW-11342) - [Python] [Gandiva] Expose ToString and result type information
* [ARROW-11499](https://issues.apache.org/jira/browse/ARROW-11499) - [Packaging] Remove all use of bintray
* [ARROW-11514](https://issues.apache.org/jira/browse/ARROW-11514) - [R][C++] Bindings for paste(), paste0(), str\_c()
* [ARROW-11515](https://issues.apache.org/jira/browse/ARROW-11515) - [R] Bindings for strsplit
* [ARROW-11565](https://issues.apache.org/jira/browse/ARROW-11565) - [C++][Gandiva] Modify upper()/lower() to work with UTF8 and add INIT\_CAP function
* [ARROW-11581](https://issues.apache.org/jira/browse/ARROW-11581) - [Packaging][C++] Formalize distribution through vcpkg
* [ARROW-11608](https://issues.apache.org/jira/browse/ARROW-11608) - [CI] turbodbc integration tests are failing (build isue)
* [ARROW-11660](https://issues.apache.org/jira/browse/ARROW-11660) - [C++] Move RecordBatch::SelectColumns method from R to C++ library
* [ARROW-11673](https://issues.apache.org/jira/browse/ARROW-11673) - [C++] Casting dictionary type to use different index type
* [ARROW-11675](https://issues.apache.org/jira/browse/ARROW-11675) - [CI][C++] Resolve ctest failures on VS 2019 builds
* [ARROW-11705](https://issues.apache.org/jira/browse/ARROW-11705) - [R] Support scalar value recycling in RecordBatch/Table$create()
* [ARROW-11759](https://issues.apache.org/jira/browse/ARROW-11759) - [C++] Kernel to extract datetime components (year, month, day, etc) from timestamp type
* [ARROW-11769](https://issues.apache.org/jira/browse/ARROW-11769) - [R] Pull groups from grouped\_df into RecordBatch or Table
* [ARROW-11772](https://issues.apache.org/jira/browse/ARROW-11772) - [C++] Add asynchronous read to ipc::RecordBatchFileReader
* [ARROW-11782](https://issues.apache.org/jira/browse/ARROW-11782) - [GLib][Ruby][Dataset] Remove bindings for internal classes
* [ARROW-11787](https://issues.apache.org/jira/browse/ARROW-11787) - [R] Implement write csv
* [ARROW-11843](https://issues.apache.org/jira/browse/ARROW-11843) - [C++] Add asynchronous read to parquet::arrow::FileReader
* [ARROW-11849](https://issues.apache.org/jira/browse/ARROW-11849) - [R] Use roxygen @examplesIf tag in R docs
* [ARROW-11889](https://issues.apache.org/jira/browse/ARROW-11889) - [C++] Add parallelism to streaming CSV reader
* [ARROW-11909](https://issues.apache.org/jira/browse/ARROW-11909) - [C++] Get rid of MakeIteratorGenerator
* [ARROW-11926](https://issues.apache.org/jira/browse/ARROW-11926) - [R] Pass on the new UCRT CRAN windows builds
* [ARROW-11926](https://issues.apache.org/jira/browse/ARROW-11926) - [R] Pass on the new UCRT CRAN windows builds
* [ARROW-11928](https://issues.apache.org/jira/browse/ARROW-11928) - [C++][Compute] Add ExecNode hierarchy
* [ARROW-11929](https://issues.apache.org/jira/browse/ARROW-11929) - [C++][Compute] Promote Expression to the compute namespace
* [ARROW-11930](https://issues.apache.org/jira/browse/ARROW-11930) - [C++][Dataset][Compute] Refactor Dataset scans to use an ExecNode graph
* [ARROW-11932](https://issues.apache.org/jira/browse/ARROW-11932) - [C++] Provide ArrayBuilder::AppendScalar
* [ARROW-11950](https://issues.apache.org/jira/browse/ARROW-11950) - [C++][Compute] Add unary negative kernel
* [ARROW-11960](https://issues.apache.org/jira/browse/ARROW-11960) - [C++][Gandiva] Support escape in LIKE
* [ARROW-11980](https://issues.apache.org/jira/browse/ARROW-11980) - [Python] Remove "experimental" status from Table.replace\_schema\_metadata
* [ARROW-11986](https://issues.apache.org/jira/browse/ARROW-11986) - [C++][Gandiva] Implement IN expressions for doubles and floats
* [ARROW-11990](https://issues.apache.org/jira/browse/ARROW-11990) - [C++][Compute] Use Status/Result return consistently to indicate errors
* [ARROW-12004](https://issues.apache.org/jira/browse/ARROW-12004) - [C++] Result<detail::Empty\> is annoying
* [ARROW-12010](https://issues.apache.org/jira/browse/ARROW-12010) - [C++][Compute] Improve performance of the hash table used in GroupIdentifier
* [ARROW-12016](https://issues.apache.org/jira/browse/ARROW-12016) - [C++] Implement array\_sort\_indices and sort\_indices for BOOL type
* [ARROW-12050](https://issues.apache.org/jira/browse/ARROW-12050) - [C++][Python][FlightRPC] Use StopToken to enable interrupting long Flight operations
* [ARROW-12074](https://issues.apache.org/jira/browse/ARROW-12074) - [C++][Compute] Add scalar arithmetic kernels for decimal inputs
* [ARROW-12083](https://issues.apache.org/jira/browse/ARROW-12083) - [R] schema use in open\_dataset
* [ARROW-12092](https://issues.apache.org/jira/browse/ARROW-12092) - [R] Make expect\_dplyr\_equal() a bit stricter
* [ARROW-12166](https://issues.apache.org/jira/browse/ARROW-12166) - [C++][Gandiva] Implements CONVERT\_TO(value, type) function
* [ARROW-12184](https://issues.apache.org/jira/browse/ARROW-12184) - [R] Bindings for na.fail, na.omit, na.exclude, na.pass
* [ARROW-12185](https://issues.apache.org/jira/browse/ARROW-12185) - [R] Bindings for any, all
* [ARROW-12198](https://issues.apache.org/jira/browse/ARROW-12198) - [R] bindings for strptime
* [ARROW-12199](https://issues.apache.org/jira/browse/ARROW-12199) - [R] bindings for stddev, variance
* [ARROW-12205](https://issues.apache.org/jira/browse/ARROW-12205) - [C++][Gandiva] Implement TO\_TIME([number] secs) and TO\_TIMESTAMP([number] secs) function
* [ARROW-12231](https://issues.apache.org/jira/browse/ARROW-12231) - [C++][Dataset] Separate datasets backed by readers from InMemoryDataset
* [ARROW-12253](https://issues.apache.org/jira/browse/ARROW-12253) - [Rust] [Ballista] Implement scalable joins
* [ARROW-12255](https://issues.apache.org/jira/browse/ARROW-12255) - [Rust] [Ballista] Integrate scheduler with DataFusion
* [ARROW-12256](https://issues.apache.org/jira/browse/ARROW-12256) - [Rust] [Ballista] Add DataFrame support
* [ARROW-12257](https://issues.apache.org/jira/browse/ARROW-12257) - [Rust] [Ballista] Publish user guide to Arrow site
* [ARROW-12261](https://issues.apache.org/jira/browse/ARROW-12261) - [Rust] [Ballista] Ballista should not have its own DataFrame API
* [ARROW-12291](https://issues.apache.org/jira/browse/ARROW-12291) - [R] Determine the type of an unevaluated expression
* [ARROW-12310](https://issues.apache.org/jira/browse/ARROW-12310) - [Java] ValueVector\#getObject should support covariance for complex types
* [ARROW-12355](https://issues.apache.org/jira/browse/ARROW-12355) - [C++] Implement efficient async CSV scanning
* [ARROW-12362](https://issues.apache.org/jira/browse/ARROW-12362) - [Rust] [DataFusion] topk\_query test failure
* [ARROW-12364](https://issues.apache.org/jira/browse/ARROW-12364) - [Python] [Dataset] Add metadata\_collector option to ds.write\_dataset()
* [ARROW-12378](https://issues.apache.org/jira/browse/ARROW-12378) - [C++][Gandiva] Implement castVARBINARY functions
* [ARROW-12386](https://issues.apache.org/jira/browse/ARROW-12386) - [C++] Support file parallelism in AsyncScanner
* [ARROW-12391](https://issues.apache.org/jira/browse/ARROW-12391) - [Rust][DataFusion] Implement date\_trunc() function
* [ARROW-12392](https://issues.apache.org/jira/browse/ARROW-12392) - [C++] Restore asynchronous streaming CSV reader
* [ARROW-12393](https://issues.apache.org/jira/browse/ARROW-12393) - [JS] Optimally use closure compiler
* [ARROW-12403](https://issues.apache.org/jira/browse/ARROW-12403) - [Rust] [Ballista] Integration tests should check that query results are correct
* [ARROW-12415](https://issues.apache.org/jira/browse/ARROW-12415) - [CI] [Python] ERROR: Failed building wheel for pygit2 on ARM64
* [ARROW-12424](https://issues.apache.org/jira/browse/ARROW-12424) - [Go][Parquet] Add Schema Package
* [ARROW-12428](https://issues.apache.org/jira/browse/ARROW-12428) - [Python] pyarrow.parquet.read\_\* should use pre\_buffer=True
* [ARROW-12434](https://issues.apache.org/jira/browse/ARROW-12434) - [Rust] [Ballista] Show executed plans with metrics
* [ARROW-12442](https://issues.apache.org/jira/browse/ARROW-12442) - [CI] Set job timeouts on GitHub Actions
* [ARROW-12443](https://issues.apache.org/jira/browse/ARROW-12443) - [C++][Gandiva] Implement castVARCHAR function for binary input
* [ARROW-12444](https://issues.apache.org/jira/browse/ARROW-12444) - [RUST] [CI] Remove Rust and point integration tests to arrow-rs repo
* [ARROW-12445](https://issues.apache.org/jira/browse/ARROW-12445) - [Rust] Design and implement packaging process to bundle Rust in signed tar
* [ARROW-12468](https://issues.apache.org/jira/browse/ARROW-12468) - [Python][R] Expose UseAsync to python/R
* [ARROW-12478](https://issues.apache.org/jira/browse/ARROW-12478) - [C++] Support LLVM 12
* [ARROW-12484](https://issues.apache.org/jira/browse/ARROW-12484) - [CI] Change jinja macros to not require CROSSBOW\_TOKEN to upload artifacts in Github Actions
* [ARROW-12489](https://issues.apache.org/jira/browse/ARROW-12489) - [Developer] autotune is broken
* [ARROW-12490](https://issues.apache.org/jira/browse/ARROW-12490) - [Dev] Use miniforge for all platforms
* [ARROW-12492](https://issues.apache.org/jira/browse/ARROW-12492) - [Python] Add an helper method to decode a DictionaryArray back to a plain Array
* [ARROW-12496](https://issues.apache.org/jira/browse/ARROW-12496) - [C++][Dataset] Ensure Scanner tests fully cover async
* [ARROW-12499](https://issues.apache.org/jira/browse/ARROW-12499) - [C++][Compute][R] Add ScalarAggregateOptions to Any and All kernels
* [ARROW-12500](https://issues.apache.org/jira/browse/ARROW-12500) - [C++][Dataset] Consolidate similar tests for file formats
* [ARROW-12501](https://issues.apache.org/jira/browse/ARROW-12501) - [CI][Ruby] Remove needless workaround for MinGW build
* [ARROW-12507](https://issues.apache.org/jira/browse/ARROW-12507) - [CI] Remove duplicated cron/nightly builds
* [ARROW-12512](https://issues.apache.org/jira/browse/ARROW-12512) - [C++][Dataset] Implement CSV writing support
* [ARROW-12514](https://issues.apache.org/jira/browse/ARROW-12514) - [Release] Don't run Gandiva related Ruby test with ARROW\_GANDIVA=OFF
* [ARROW-12517](https://issues.apache.org/jira/browse/ARROW-12517) - [Go] Expose App Metadata in Flight client
* [ARROW-12518](https://issues.apache.org/jira/browse/ARROW-12518) - [Python] Expose Parquet statistics has\_null\_count / has\_distinct\_count
* [ARROW-12520](https://issues.apache.org/jira/browse/ARROW-12520) - [R] Minor docs updates
* [ARROW-12522](https://issues.apache.org/jira/browse/ARROW-12522) - [C++] Implement asynchronous/"lazy" variants of ReadRangeCache
* [ARROW-12525](https://issues.apache.org/jira/browse/ARROW-12525) - [JS] Vector toJSON returns an array
* [ARROW-12527](https://issues.apache.org/jira/browse/ARROW-12527) - [Dev] Don't try getting JIRA information for MINOR PR
* [ARROW-12528](https://issues.apache.org/jira/browse/ARROW-12528) - [JS] Support typed arrays in Table.new
* [ARROW-12530](https://issues.apache.org/jira/browse/ARROW-12530) - [C++] Remove Buffer::mutable\_data\_ member and use const\_cast on data\_ only if is\_mutable\_ is true
* [ARROW-12533](https://issues.apache.org/jira/browse/ARROW-12533) - [C++] Random real generator is slow on Arm64 Linux when built with clang
* [ARROW-12534](https://issues.apache.org/jira/browse/ARROW-12534) - [C++][Gandiva] Implement LEFT and RIGHT functions on Gandiva for string input values
* [ARROW-12537](https://issues.apache.org/jira/browse/ARROW-12537) - [JS] Docs build should not include test sources
* [ARROW-12541](https://issues.apache.org/jira/browse/ARROW-12541) - [Docs] Improve styling/readability of tables in the new doc theme
* [ARROW-12551](https://issues.apache.org/jira/browse/ARROW-12551) - [Java][Release] Java post-release tests fail due to missing testing data
* [ARROW-12554](https://issues.apache.org/jira/browse/ARROW-12554) - Allow duplicates in the value\_set for compute::is\_in
* [ARROW-12555](https://issues.apache.org/jira/browse/ARROW-12555) - [Java][Release] Java post-release script misses dataset JNI bindings
* [ARROW-12556](https://issues.apache.org/jira/browse/ARROW-12556) - [C++][Gandiva] Implement BYTESUBSTRING functions on Gandiva
* [ARROW-12560](https://issues.apache.org/jira/browse/ARROW-12560) - [C++] Investigate utilizing aggressive thread task creation when adding callback to finished future
* [ARROW-12567](https://issues.apache.org/jira/browse/ARROW-12567) - [C++][Gandiva] Implement LPAD and RPAD functions for string input values
* [ARROW-12567](https://issues.apache.org/jira/browse/ARROW-12567) - [C++][Gandiva] Implement LPAD and RPAD functions for string input values
* [ARROW-12571](https://issues.apache.org/jira/browse/ARROW-12571) - [R][CI] Run nightly R with valgrind
* [ARROW-12575](https://issues.apache.org/jira/browse/ARROW-12575) - [R] Use unary negative kernel
* [ARROW-12577](https://issues.apache.org/jira/browse/ARROW-12577) - [Website] Use Artifactory instead of Bintray in all places
* [ARROW-12578](https://issues.apache.org/jira/browse/ARROW-12578) - [JS] Simplify UTF8 handling in NodeJS
* [ARROW-12581](https://issues.apache.org/jira/browse/ARROW-12581) - [C++][FlightRPC] Benchmark compression with real data
* [ARROW-12584](https://issues.apache.org/jira/browse/ARROW-12584) - [C++][Python] Expose method for benchmarking tools to release unused memory from the allocators
* [ARROW-12591](https://issues.apache.org/jira/browse/ARROW-12591) - [Java][Gandiva] Create single Gandiva jar for MacOS and Linux
* [ARROW-12593](https://issues.apache.org/jira/browse/ARROW-12593) - [Packaging][Ubuntu] Add support for Ubuntu 21.04
* [ARROW-12597](https://issues.apache.org/jira/browse/ARROW-12597) - [C++] Implement OptionalParallelForAsync
* [ARROW-12598](https://issues.apache.org/jira/browse/ARROW-12598) - [C++][Dataset] Implement row-count for CSV or allow selecting 0 columns from CSV
* [ARROW-12599](https://issues.apache.org/jira/browse/ARROW-12599) - [Doc][Python] Documentation missing for pyarrow.Table
* [ARROW-12600](https://issues.apache.org/jira/browse/ARROW-12600) - [CI] Push docker images from crossbow tasks
* [ARROW-12602](https://issues.apache.org/jira/browse/ARROW-12602) - [R] Add BuildInfo from C++ to arrow\_info
* [ARROW-12608](https://issues.apache.org/jira/browse/ARROW-12608) - [C++] Add split\_pattern\_regex function
* [ARROW-12612](https://issues.apache.org/jira/browse/ARROW-12612) - [C++][Compute] Add Expression to type\_fwd.h
* [ARROW-12619](https://issues.apache.org/jira/browse/ARROW-12619) - [Python] pyarrow sdist should not require git
* [ARROW-12621](https://issues.apache.org/jira/browse/ARROW-12621) - [C++][Gandiva] Add alias to sha1 and sha256 functions
* [ARROW-12631](https://issues.apache.org/jira/browse/ARROW-12631) - [Python] pyarrow.dataset.write\_table should accept a Scanner to write
* [ARROW-12643](https://issues.apache.org/jira/browse/ARROW-12643) - Add documentation for experimental repos
* [ARROW-12645](https://issues.apache.org/jira/browse/ARROW-12645) - [Python] Fix numpydoc validation
* [ARROW-12648](https://issues.apache.org/jira/browse/ARROW-12648) - [C++][FlightRPC] Allow using TLS in benchmark
* [ARROW-12649](https://issues.apache.org/jira/browse/ARROW-12649) - [Python/Packaging] Move conda-aarch64 to Azure with cross-compilation
* [ARROW-12653](https://issues.apache.org/jira/browse/ARROW-12653) - [Archery] allow me to add a comment to crossbow requests
* [ARROW-12658](https://issues.apache.org/jira/browse/ARROW-12658) - [C++] Bump aws-c-common to v0.5.10
* [ARROW-12660](https://issues.apache.org/jira/browse/ARROW-12660) - [R] Post-4.0 adjustments for CRAN
* [ARROW-12661](https://issues.apache.org/jira/browse/ARROW-12661) - [C++] CSV add skip rows after column names
* [ARROW-12662](https://issues.apache.org/jira/browse/ARROW-12662) - [Website] Force to use squash merge
* [ARROW-12667](https://issues.apache.org/jira/browse/ARROW-12667) - [Python] Ensure test coverage for conversion of strided numpy arrays
* [ARROW-12675](https://issues.apache.org/jira/browse/ARROW-12675) - [C++] CSV should include line/row numbers in parsing error messages
* [ARROW-12677](https://issues.apache.org/jira/browse/ARROW-12677) - [Python] Add a mask argument to pyarrow.StructArray.from\_arrays
* [ARROW-12685](https://issues.apache.org/jira/browse/ARROW-12685) - [C++][Compute] Add unary absolute value kernel
* [ARROW-12686](https://issues.apache.org/jira/browse/ARROW-12686) - [C++][Python][FlightRPC] Support export\_to\_c in DoGet/inherit from RecordBatchReader
* [ARROW-12687](https://issues.apache.org/jira/browse/ARROW-12687) - [C++][Python][Dataset] Support C Data Interface with Scanner
* [ARROW-12689](https://issues.apache.org/jira/browse/ARROW-12689) - [R] Implement ArrowArrayStream C interface
* [ARROW-12692](https://issues.apache.org/jira/browse/ARROW-12692) - [R] Improve tests and comments for strsplit() bindings
* [ARROW-12694](https://issues.apache.org/jira/browse/ARROW-12694) - [R][CI] rtools35 job failing on 32-bit build tests
* [ARROW-12696](https://issues.apache.org/jira/browse/ARROW-12696) - [R] Improve testing of error messages converted to warnings
* [ARROW-12699](https://issues.apache.org/jira/browse/ARROW-12699) - [CI][Packaging][Java] Generate a jar compatible with Linux and MacOS for all Arrow components
* [ARROW-12702](https://issues.apache.org/jira/browse/ARROW-12702) - [JS] Upgrade Webpack and terser
* [ARROW-12703](https://issues.apache.org/jira/browse/ARROW-12703) - [JS] Separate Table from DataFrame
* [ARROW-12704](https://issues.apache.org/jira/browse/ARROW-12704) - [JS] use optional chaining
* [ARROW-12709](https://issues.apache.org/jira/browse/ARROW-12709) - [C++] Add variadic string join kernel
* [ARROW-12713](https://issues.apache.org/jira/browse/ARROW-12713) - [C++] String reverse kernel
* [ARROW-12715](https://issues.apache.org/jira/browse/ARROW-12715) - [C++] SQL-style glob string match kernel
* [ARROW-12716](https://issues.apache.org/jira/browse/ARROW-12716) - [C++] Left/right/center string padding kernels
* [ARROW-12717](https://issues.apache.org/jira/browse/ARROW-12717) - [C++] Substring find position kernel
* [ARROW-12719](https://issues.apache.org/jira/browse/ARROW-12719) - [C++][Python] pyarrow.fs.S3FileSystem pass extra kwargs i.e ACL
* [ARROW-12721](https://issues.apache.org/jira/browse/ARROW-12721) - [CI] Fix path for uploading aarch64 conda artifacts from the nightly builds
* [ARROW-12722](https://issues.apache.org/jira/browse/ARROW-12722) - [R] Raise error when attemping to print table with duplicated naming
* [ARROW-12730](https://issues.apache.org/jira/browse/ARROW-12730) - [MATLAB] Update featherreadmex and featherwritemex to build against latest arrow c++ APIs
* [ARROW-12731](https://issues.apache.org/jira/browse/ARROW-12731) - [R] Use InMemoryDataset for Table/RecordBatch in dplyr code
* [ARROW-12736](https://issues.apache.org/jira/browse/ARROW-12736) - [C++] Eliminate unnecessary copy in FieldPath::Get()
* [ARROW-12738](https://issues.apache.org/jira/browse/ARROW-12738) - [CI] [Gandiva] Nightly build error in azure-conda-osx-clang-py38 (and py39, py\*-r\*)
* [ARROW-12741](https://issues.apache.org/jira/browse/ARROW-12741) - [CI] Configure GitHub Token for Nightly Builds
* [ARROW-12745](https://issues.apache.org/jira/browse/ARROW-12745) - [C++][Compute] Add floor, ceiling, and truncate kernels
* [ARROW-12749](https://issues.apache.org/jira/browse/ARROW-12749) - [C++] Unnecessary copy cause by constructing RecordBatch/Table/Schema from lvalues
* [ARROW-12750](https://issues.apache.org/jira/browse/ARROW-12750) - [CI] [R] Actually pass parameterized docker options to the templates
* [ARROW-12751](https://issues.apache.org/jira/browse/ARROW-12751) - [C++] Add variadic row-wise min/max kernels (least/greatest)
* [ARROW-12758](https://issues.apache.org/jira/browse/ARROW-12758) - [R] Add examples to more function documentation
* [ARROW-12760](https://issues.apache.org/jira/browse/ARROW-12760) - [C++][Python][R] S3FileSystem: IO thread parallelism limited to 8 threads
* [ARROW-12761](https://issues.apache.org/jira/browse/ARROW-12761) - [R] Better error handling for write\_to\_raw
* [ARROW-12764](https://issues.apache.org/jira/browse/ARROW-12764) - [CI] Fix arguments in Conda Windows builds
* [ARROW-12777](https://issues.apache.org/jira/browse/ARROW-12777) - [R] Convert all inputs to Arrow objects in match\_arrow and is\_in
* [ARROW-12781](https://issues.apache.org/jira/browse/ARROW-12781) - [R] Implement is.type() functions for dplyr
* [ARROW-12785](https://issues.apache.org/jira/browse/ARROW-12785) - [CI] the r-devdocs build errors when brew installing gcc
* [ARROW-12791](https://issues.apache.org/jira/browse/ARROW-12791) - [R] Better error handling for DatasetFactory$Finish() when no format specified
* [ARROW-12796](https://issues.apache.org/jira/browse/ARROW-12796) - [JS] Support JSON output from benchmarks
* [ARROW-12800](https://issues.apache.org/jira/browse/ARROW-12800) - [JS] Drop IE Support and remove text encoder and decoder polyfills
* [ARROW-12801](https://issues.apache.org/jira/browse/ARROW-12801) - [CI][Packaging][Java] Include all modules in script that generate Arrow jars
* [ARROW-12806](https://issues.apache.org/jira/browse/ARROW-12806) - [Python] test\_write\_to\_dataset\_filesystem missing a dataset mark
* [ARROW-12808](https://issues.apache.org/jira/browse/ARROW-12808) - [JS] Document browser support
* [ARROW-12810](https://issues.apache.org/jira/browse/ARROW-12810) - [Python] Run tests with AWS\_EC2\_METADATA\_DISABLED=true
* [ARROW-12812](https://issues.apache.org/jira/browse/ARROW-12812) - [Packaging][Java] Improve JNI jars build
* [ARROW-12824](https://issues.apache.org/jira/browse/ARROW-12824) - [R][CI] Upgrade builds for R 4.1 release
* [ARROW-12827](https://issues.apache.org/jira/browse/ARROW-12827) - [C++] [Dataset] Review error pass-through in the datasets API
* [ARROW-12829](https://issues.apache.org/jira/browse/ARROW-12829) - [GLib][Ruby] Add support for Apache Arrow Flight
* [ARROW-12831](https://issues.apache.org/jira/browse/ARROW-12831) - [CI][macOS] Remove needless Homebrew workaround
* [ARROW-12832](https://issues.apache.org/jira/browse/ARROW-12832) - [JS] Write benchmarks in TypeScript
* [ARROW-12833](https://issues.apache.org/jira/browse/ARROW-12833) - [JS] Construct perf data in JS
* [ARROW-12835](https://issues.apache.org/jira/browse/ARROW-12835) - [C++] Implement case insenstive match in match\_substring(\_regex) and match\_like
* [ARROW-12836](https://issues.apache.org/jira/browse/ARROW-12836) - [C++] Installation on IBM i fails because of CxxFlags
* [ARROW-12841](https://issues.apache.org/jira/browse/ARROW-12841) - [R] Add examples to more function documentation - part 2
* [ARROW-12843](https://issues.apache.org/jira/browse/ARROW-12843) - [C++][Compute] Add is\_inf kernel for floating point arrays
* [ARROW-12848](https://issues.apache.org/jira/browse/ARROW-12848) - [Release] Mail template points to 404
* [ARROW-12851](https://issues.apache.org/jira/browse/ARROW-12851) - [Go][Parquet] Add Encoding Package Part 1
* [ARROW-12856](https://issues.apache.org/jira/browse/ARROW-12856) - [C++][Gandiva] Implement castBIT and castBOOLEAN functions on Gandiva
* [ARROW-12859](https://issues.apache.org/jira/browse/ARROW-12859) - [C++] Add ScalarFromJSON for easier testing
* [ARROW-12861](https://issues.apache.org/jira/browse/ARROW-12861) - [C++][Compute] Add sign function kernels
* [ARROW-12867](https://issues.apache.org/jira/browse/ARROW-12867) - [R] Bindings for abs()
* [ARROW-12868](https://issues.apache.org/jira/browse/ARROW-12868) - [R] Bindings for find\_substring and find\_substring\_regex
* [ARROW-12869](https://issues.apache.org/jira/browse/ARROW-12869) - [R] Bindings for utf8\_reverse and ascii\_reverse
* [ARROW-12870](https://issues.apache.org/jira/browse/ARROW-12870) - [R] Bindings for stringr::str\_like
* [ARROW-12875](https://issues.apache.org/jira/browse/ARROW-12875) - [JS] Upgrade Jest and other minor updates
* [ARROW-12883](https://issues.apache.org/jira/browse/ARROW-12883) - [R] [CI] version compatibility fails on R 4.1
* [ARROW-12891](https://issues.apache.org/jira/browse/ARROW-12891) - [C++][Compute][Dataset] Extract subtree pruning logic to compute::
* [ARROW-12894](https://issues.apache.org/jira/browse/ARROW-12894) - [R] Bump R version
* [ARROW-12895](https://issues.apache.org/jira/browse/ARROW-12895) - [CI] Use "concurrency" setting on Github Actions
* [ARROW-12898](https://issues.apache.org/jira/browse/ARROW-12898) - [Release][C\#] Package upload script is broken
* [ARROW-12900](https://issues.apache.org/jira/browse/ARROW-12900) - [Python][Documentation] an np import in Reading Datasets docs
* [ARROW-12901](https://issues.apache.org/jira/browse/ARROW-12901) - [R] Follow on to more examples
* [ARROW-12909](https://issues.apache.org/jira/browse/ARROW-12909) - [R][Release] Build of ubuntu-docs is failing
* [ARROW-12912](https://issues.apache.org/jira/browse/ARROW-12912) - [Website] Use .asf.yaml for publishing
* [ARROW-12915](https://issues.apache.org/jira/browse/ARROW-12915) - [Release] Build of ubuntu-docs is failing on thrift
* [ARROW-12936](https://issues.apache.org/jira/browse/ARROW-12936) - [C++][Gandiva] Implement ASCII Hive function on Gandiva
* [ARROW-12937](https://issues.apache.org/jira/browse/ARROW-12937) - [C++] Allow specifying default metadata for new S3 files
* [ARROW-12939](https://issues.apache.org/jira/browse/ARROW-12939) - [R] Simplify RTask stop handling
* [ARROW-12940](https://issues.apache.org/jira/browse/ARROW-12940) - [R] Expose C interface as R6 methods
* [ARROW-12948](https://issues.apache.org/jira/browse/ARROW-12948) - [C++] Add string slice replace kernel
* [ARROW-12949](https://issues.apache.org/jira/browse/ARROW-12949) - [C++] Add string starts-with/ends-with kernels
* [ARROW-12950](https://issues.apache.org/jira/browse/ARROW-12950) - [C++] Add substring count kernel
* [ARROW-12951](https://issues.apache.org/jira/browse/ARROW-12951) - [C++] Refactor StringTransform
* [ARROW-12952](https://issues.apache.org/jira/browse/ARROW-12952) - [C++] Add regex count kernel
* [ARROW-12955](https://issues.apache.org/jira/browse/ARROW-12955) - [C++] Add additional type support for if\_else kernel
* [ARROW-12957](https://issues.apache.org/jira/browse/ARROW-12957) - [R] rchk issues on cran
* [ARROW-12961](https://issues.apache.org/jira/browse/ARROW-12961) - [C++] MSVC issues warning building PyArrow on Windows
* [ARROW-12962](https://issues.apache.org/jira/browse/ARROW-12962) - [GLib][Ruby] Add Arrow:Scalar
* [ARROW-12964](https://issues.apache.org/jira/browse/ARROW-12964) - [R] Add bindings for ifelse() and if\_else()
* [ARROW-12966](https://issues.apache.org/jira/browse/ARROW-12966) - [Python] Expose Python binding for ElementWiseAggregateOptions
* [ARROW-12967](https://issues.apache.org/jira/browse/ARROW-12967) - [R] Add bindings for pmin() and pmax()
* [ARROW-12968](https://issues.apache.org/jira/browse/ARROW-12968) - [R] [CI] Add an rchk job to our nightlies
* [ARROW-12972](https://issues.apache.org/jira/browse/ARROW-12972) - [CI] ][C++] archive\_write\_add\_filter\_zstd error on CentOS + ARM64
* [ARROW-12975](https://issues.apache.org/jira/browse/ARROW-12975) - [C++][Python] if\_else kernel doesn't support upcasting
* [ARROW-12982](https://issues.apache.org/jira/browse/ARROW-12982) - [C++] Re-enable unused-variable warning
* [ARROW-12984](https://issues.apache.org/jira/browse/ARROW-12984) - [C++] Passing options parameter of Count/Index aggregation by reference
* [ARROW-12985](https://issues.apache.org/jira/browse/ARROW-12985) - [Python][Packaging] Unable to install pygit2 in the arm64 wheel builds
* [ARROW-12986](https://issues.apache.org/jira/browse/ARROW-12986) - [C++][Gandiva] Implement new cache eviction policy in Gandiva
* [ARROW-12992](https://issues.apache.org/jira/browse/ARROW-12992) - [R] bindings for substr(), substring(), str\_sub()
* [ARROW-12994](https://issues.apache.org/jira/browse/ARROW-12994) - [R] Fix tests that assume UTC local tz
* [ARROW-12996](https://issues.apache.org/jira/browse/ARROW-12996) - [C++] CSV stream reader has no progress indication
* [ARROW-13002](https://issues.apache.org/jira/browse/ARROW-13002) - [C++] Add a check for the utf8proc's version in CMake
* [ARROW-13005](https://issues.apache.org/jira/browse/ARROW-13005) - [C++] Support filter/take for union data type.
* [ARROW-13006](https://issues.apache.org/jira/browse/ARROW-13006) - [C++][Gandiva] Implement BASE64 and UNBASE64 Hive functions on Gandiva
* [ARROW-13009](https://issues.apache.org/jira/browse/ARROW-13009) - [Doc][Dev] Document builds mailing-list
* [ARROW-13022](https://issues.apache.org/jira/browse/ARROW-13022) - [R] bindings for lubridate's year, isoyear, quarter, month, day, wday, yday, isoweek, hour, minute, and second functions
* [ARROW-13025](https://issues.apache.org/jira/browse/ARROW-13025) - [C++][Compute] Enhance FunctionOptions with equality, debug representability, and serializability
* [ARROW-13027](https://issues.apache.org/jira/browse/ARROW-13027) - [C++] Fix ASAN stack traces in CI
* [ARROW-13030](https://issues.apache.org/jira/browse/ARROW-13030) - [CI][Go] Setup Arm64 golang CI
* [ARROW-13031](https://issues.apache.org/jira/browse/ARROW-13031) - [JS] Support arm in closure compiler on macOS
* [ARROW-13032](https://issues.apache.org/jira/browse/ARROW-13032) - [Java] Update gauva version
* [ARROW-13034](https://issues.apache.org/jira/browse/ARROW-13034) - [Python][Docs] Update outdated examples for hdfs/azure on the Parquet doc page
* [ARROW-13036](https://issues.apache.org/jira/browse/ARROW-13036) - [Doc] Mention recommended file extension(s) for Arrow IPC
* [ARROW-13042](https://issues.apache.org/jira/browse/ARROW-13042) - [C++] Automatic checks that kernels don't leave uninitialized data in output
* [ARROW-13043](https://issues.apache.org/jira/browse/ARROW-13043) - [GLib][Ruby] Add GArrowEqualOptions
* [ARROW-13044](https://issues.apache.org/jira/browse/ARROW-13044) - [Java] Union vectors should extend ValueVector
* [ARROW-13045](https://issues.apache.org/jira/browse/ARROW-13045) - [Packaging][RPM][deb] Don't install system utf8proc if it's old
* [ARROW-13047](https://issues.apache.org/jira/browse/ARROW-13047) - [Website] Add kiszk to committer list
* [ARROW-13049](https://issues.apache.org/jira/browse/ARROW-13049) - [C++][Gandiva] Implement BIN Hive function on Gandiva
* [ARROW-13050](https://issues.apache.org/jira/browse/ARROW-13050) - [C++][Gandiva] Implement SPACE Hive function on Gandiva
* [ARROW-13054](https://issues.apache.org/jira/browse/ARROW-13054) - [C++] Add option to specify the first day of the week for the "day\_of\_week" temporal kernel
* [ARROW-13064](https://issues.apache.org/jira/browse/ARROW-13064) - [C++] Add a general "if, ifelse, ..., else" kernel ("CASE WHEN")
* [ARROW-13065](https://issues.apache.org/jira/browse/ARROW-13065) - [Packaging][RPM] Add missing required LZ4 version information
* [ARROW-13068](https://issues.apache.org/jira/browse/ARROW-13068) - [GLib][Dataset] Change prefix to gadataset\_ from gad\_
* [ARROW-13070](https://issues.apache.org/jira/browse/ARROW-13070) - [R] bindings for sd and var
* [ARROW-13072](https://issues.apache.org/jira/browse/ARROW-13072) - [C++] Add bitwise arithmetic compute functions
* [ARROW-13074](https://issues.apache.org/jira/browse/ARROW-13074) - [Python] Start with deprecating ParquetDataset custom attributes
* [ARROW-13075](https://issues.apache.org/jira/browse/ARROW-13075) - [Python] Expose C data interface API for pyarrow.Field
* [ARROW-13076](https://issues.apache.org/jira/browse/ARROW-13076) - [Java] Enable ExtensionType to use StructVector and UnionVector for underlying storage
* [ARROW-13082](https://issues.apache.org/jira/browse/ARROW-13082) - [CI] Forward R argument to ubuntu-docs build
* [ARROW-13086](https://issues.apache.org/jira/browse/ARROW-13086) - [Python] Expose Parquet ArrowReaderProperties::coerce\_int96\_timestamp\_unit\_
* [ARROW-13086](https://issues.apache.org/jira/browse/ARROW-13086) - [Python] Expose Parquet ArrowReaderProperties::coerce\_int96\_timestamp\_unit\_
* [ARROW-13091](https://issues.apache.org/jira/browse/ARROW-13091) - [Python] Add compression\_level argument to IpcWriteOptions constructor
* [ARROW-13092](https://issues.apache.org/jira/browse/ARROW-13092) - [C++] CreateDir should fail if the target exists and is not a directory
* [ARROW-13095](https://issues.apache.org/jira/browse/ARROW-13095) - [C++] Implement trigonometric compute functions
* [ARROW-13096](https://issues.apache.org/jira/browse/ARROW-13096) - [C++] Implement logarithm compute functions
* [ARROW-13097](https://issues.apache.org/jira/browse/ARROW-13097) - [C++] Provide a simple reflection utility for {{struct}}s
* [ARROW-13098](https://issues.apache.org/jira/browse/ARROW-13098) - [Dev][Archery] Reorganize docker submodule to its own subpackage
* [ARROW-13100](https://issues.apache.org/jira/browse/ARROW-13100) - [MATLAB] Integrate GoogleTest with MATLAB Interface C++ Code
* [ARROW-13101](https://issues.apache.org/jira/browse/ARROW-13101) - [Python][Doc] pyarrow.FixedSizeListArray does not appear in the documentation
* [ARROW-13110](https://issues.apache.org/jira/browse/ARROW-13110) - [C++] Deadlock can happen when using BackgroundGenerator without transferring callbacks
* [ARROW-13113](https://issues.apache.org/jira/browse/ARROW-13113) - [R] use RTasks to manage parallel in converting arrow to R
* [ARROW-13117](https://issues.apache.org/jira/browse/ARROW-13117) - [R] Retain schema in new Expressions
* [ARROW-13119](https://issues.apache.org/jira/browse/ARROW-13119) - [R] Set empty schema in scalar Expressions
* [ARROW-13124](https://issues.apache.org/jira/browse/ARROW-13124) - [Ruby] Add support for memory view
* [ARROW-13127](https://issues.apache.org/jira/browse/ARROW-13127) - [R] Valgrind nightly errors
* [ARROW-13136](https://issues.apache.org/jira/browse/ARROW-13136) - [C++] Add a "coalesce" variadic scalar kernel
* [ARROW-13137](https://issues.apache.org/jira/browse/ARROW-13137) - [C++][Documentation] Make in-table references consistent
* [ARROW-13140](https://issues.apache.org/jira/browse/ARROW-13140) - [C++/Python] Upgrade libthrift pin in the nightlies
* [ARROW-13142](https://issues.apache.org/jira/browse/ARROW-13142) - [Python] Use vector append when converting from list of non-strided numpy arrays
* [ARROW-13147](https://issues.apache.org/jira/browse/ARROW-13147) - [Java] Respect the rounding policy when allocating vector buffers
* [ARROW-13157](https://issues.apache.org/jira/browse/ARROW-13157) - [C++] Add find\_substring\_regex kernel and implement ignore\_case for find\_substring
* [ARROW-13158](https://issues.apache.org/jira/browse/ARROW-13158) - [Python] Fix repr and contains of StructScalar with duplicate field names
* [ARROW-13162](https://issues.apache.org/jira/browse/ARROW-13162) - [C++][Gandiva] Add new alias for extract date functions in Gandiva registry
* [ARROW-13171](https://issues.apache.org/jira/browse/ARROW-13171) - [R] Add binding for str\_pad()
* [ARROW-13190](https://issues.apache.org/jira/browse/ARROW-13190) - [C++] [Gandiva] Change behavior of INITCAP function
* [ARROW-13194](https://issues.apache.org/jira/browse/ARROW-13194) - [Java][Document] Create prose document about Java algorithms
* [ARROW-13195](https://issues.apache.org/jira/browse/ARROW-13195) - [R] Problem with rlang reverse dependency checks
* [ARROW-13199](https://issues.apache.org/jira/browse/ARROW-13199) - [R] add ubuntu 21.04 to nightly builds
* [ARROW-13200](https://issues.apache.org/jira/browse/ARROW-13200) - [R] Add binding for case\_when()
* [ARROW-13201](https://issues.apache.org/jira/browse/ARROW-13201) - [R] Add binding for coalesce()
* [ARROW-13210](https://issues.apache.org/jira/browse/ARROW-13210) - [Python][CI] Fix vcpkg caching mechanism for the macOS wheels
* [ARROW-13211](https://issues.apache.org/jira/browse/ARROW-13211) - [C++][CI] Remove outdated Github Actions ARM builds
* [ARROW-13212](https://issues.apache.org/jira/browse/ARROW-13212) - [Release] Support deploying to test PyPI in the python post release script
* [ARROW-13215](https://issues.apache.org/jira/browse/ARROW-13215) - [R] [CI] Add ENV TZ to docker files
* [ARROW-13218](https://issues.apache.org/jira/browse/ARROW-13218) - [Doc] Document/clarify conventions for timestamp storage
* [ARROW-13219](https://issues.apache.org/jira/browse/ARROW-13219) - [C++][GLib] Demote/deprecate CompareOptions
* [ARROW-13224](https://issues.apache.org/jira/browse/ARROW-13224) - [Python][Doc] Documentation missing for pyarrow.dataset.write\_dataset
* [ARROW-13226](https://issues.apache.org/jira/browse/ARROW-13226) - [Python] Add a general purpose cython trampolining utility
* [ARROW-13228](https://issues.apache.org/jira/browse/ARROW-13228) - [C++] S3 CreateBucket fails because AWS treats us-east-1 differently than other regions
* [ARROW-13230](https://issues.apache.org/jira/browse/ARROW-13230) - Add CSV Writer documentation
* [ARROW-13234](https://issues.apache.org/jira/browse/ARROW-13234) - [C++] Add string padding option to determine which side the extra space goes on
* [ARROW-13235](https://issues.apache.org/jira/browse/ARROW-13235) - [C++] Make type\_name equal to options class name for all FunctionOptionTypes
* [ARROW-13236](https://issues.apache.org/jira/browse/ARROW-13236) - [Python] Improve repr of pyarrow.compute.FunctionOptions
* [ARROW-13238](https://issues.apache.org/jira/browse/ARROW-13238) - [C++][Dataset][Compute] Substitute ExecPlan impl for dataset scans
* [ARROW-13242](https://issues.apache.org/jira/browse/ARROW-13242) - [C++] Improve decimal random generation
* [ARROW-13244](https://issues.apache.org/jira/browse/ARROW-13244) - [C++] Add facility to get current thread id
* [ARROW-13258](https://issues.apache.org/jira/browse/ARROW-13258) - [Python] Improve the repr of ParquetFileFragment
* [ARROW-13262](https://issues.apache.org/jira/browse/ARROW-13262) - [R] transmute() fails after pulling data into R
* [ARROW-13273](https://issues.apache.org/jira/browse/ARROW-13273) - [C++] Don't use .pc only in CMake paths for Requires.private
* [ARROW-13274](https://issues.apache.org/jira/browse/ARROW-13274) - [JS] Remove Webpack
* [ARROW-13275](https://issues.apache.org/jira/browse/ARROW-13275) - [JS] Fix perf tests
* [ARROW-13276](https://issues.apache.org/jira/browse/ARROW-13276) - [GLib][Ruby][Flight] Add support for ListFlights
* [ARROW-13277](https://issues.apache.org/jira/browse/ARROW-13277) - [JS] Add declaration maps
* [ARROW-13280](https://issues.apache.org/jira/browse/ARROW-13280) - [R] Bindings for log and trig functions
* [ARROW-13282](https://issues.apache.org/jira/browse/ARROW-13282) - [C++] Remove obsolete generated files
* [ARROW-13283](https://issues.apache.org/jira/browse/ARROW-13283) - [Developer Tools] Support passing through memory limits in archery docker run
* [ARROW-13286](https://issues.apache.org/jira/browse/ARROW-13286) - [CI] Require docker-compose 1.27.0 or later
* [ARROW-13289](https://issues.apache.org/jira/browse/ARROW-13289) - [C++] Log functions don't have int kernels
* [ARROW-13291](https://issues.apache.org/jira/browse/ARROW-13291) - [GLib][CI] Require gobject-introspection 3.4.5 or later
* [ARROW-13296](https://issues.apache.org/jira/browse/ARROW-13296) - [C++] Provide reflection-compatible enum replacement
* [ARROW-13299](https://issues.apache.org/jira/browse/ARROW-13299) - [JS] Upgrade ix and rxjs
* [ARROW-13303](https://issues.apache.org/jira/browse/ARROW-13303) - [JS] Revise bundles
* [ARROW-13306](https://issues.apache.org/jira/browse/ARROW-13306) - [Java][JDBC] use ResultSetMetaData.getColumnLabel instead of ResultSetMetaData.getColumnName
* [ARROW-13313](https://issues.apache.org/jira/browse/ARROW-13313) - [C++][Compute] Add ScalarAggregateNode
* [ARROW-13320](https://issues.apache.org/jira/browse/ARROW-13320) - [Website] Add MIME types to FAQ
* [ARROW-13323](https://issues.apache.org/jira/browse/ARROW-13323) - [Archery] Validate docker compose configuration
* [ARROW-13343](https://issues.apache.org/jira/browse/ARROW-13343) - [R] Update NEWS.md for 5.0
* [ARROW-13346](https://issues.apache.org/jira/browse/ARROW-13346) - [C++] Remove compile time parsing from EnumType
* [ARROW-13355](https://issues.apache.org/jira/browse/ARROW-13355) - [R] ensure that sf is installed in our revdep job
* [ARROW-13357](https://issues.apache.org/jira/browse/ARROW-13357) - [R] bindings for sign()
* [ARROW-13365](https://issues.apache.org/jira/browse/ARROW-13365) - [R] bindings for floor/ceiling/truncate
* [ARROW-13385](https://issues.apache.org/jira/browse/ARROW-13385) - [C++][Compute] Document out-of-source addition to the FunctionRegistry
* [ARROW-13386](https://issues.apache.org/jira/browse/ARROW-13386) - [R][C++] CSV streaming changes break Rtools 35 32-bit build
* [ARROW-13418](https://issues.apache.org/jira/browse/ARROW-13418) - [R] typo in python.r
* [ARROW-13461](https://issues.apache.org/jira/browse/ARROW-13461) - [Python][Packaging] Build M1 wheels for python 3.8
* [PARQUET-1798](https://issues.apache.org/jira/browse/PARQUET-1798) - [C++] Review logic around automatic assignment of field\_id's
* [PARQUET-1998](https://issues.apache.org/jira/browse/PARQUET-1998) - [C++] Implement LZ4\_RAW compression
* [PARQUET-2056](https://issues.apache.org/jira/browse/PARQUET-2056) - [C++] Add ability  for retrieving dictionary and indices separately for ColumnReader



# Apache Arrow 4.0.1 (2021-05-26)

## Bug Fixes

* [ARROW-12568](https://issues.apache.org/jira/browse/ARROW-12568) - [Python][C++] Segfault when casting a sliced ListArray of int64 in v4.0.0
* [ARROW-12601](https://issues.apache.org/jira/browse/ARROW-12601) - [R][Packaging] Fix pkg-config check in r/configure
* [ARROW-12603](https://issues.apache.org/jira/browse/ARROW-12603) - [R] open\_dataset ignoring provided schema when using select
* [ARROW-12604](https://issues.apache.org/jira/browse/ARROW-12604) - [R][Packaging] Dataset, Parquet off in autobrew and CRAN Mac builds
* [ARROW-12617](https://issues.apache.org/jira/browse/ARROW-12617) - [Python] pyarrow.orc.write\_table signature reverses that of pyarrow.parquet.write\_table
* [ARROW-12622](https://issues.apache.org/jira/browse/ARROW-12622) - [Python] Segfault when reading CSV inside Flight server
* [ARROW-12642](https://issues.apache.org/jira/browse/ARROW-12642) - [R] LIBARROW\_MINIMAL, LIBARROW\_DOWNLOAD, NOT\_CRAN env vars should not be case-sensitive
* [ARROW-12663](https://issues.apache.org/jira/browse/ARROW-12663) - [C++] segfault when arrow header is compiled with nvcc 11.2
* [ARROW-12670](https://issues.apache.org/jira/browse/ARROW-12670) - [C++] extract\_regex gives bizarre behavior after nulls or non-matches
* [ARROW-12746](https://issues.apache.org/jira/browse/ARROW-12746) - [Go][Flight] Client Auth handler overwrites outgoing metadata
* [ARROW-12769](https://issues.apache.org/jira/browse/ARROW-12769) - [Python] Negative out of range slices yield invalid arrays
* [ARROW-12774](https://issues.apache.org/jira/browse/ARROW-12774) - [C++][Compute] replace\_substring\_regex() creates invalid arrays =\> crash
* [ARROW-12776](https://issues.apache.org/jira/browse/ARROW-12776) - [Archery][Integration] Fix decimal case generation in write\_js\_test\_json
* [ARROW-12855](https://issues.apache.org/jira/browse/ARROW-12855) - error: no member named 'TableReader' in namespace during compilation


## New Features and Improvements

* [ARROW-11926](https://issues.apache.org/jira/browse/ARROW-11926) - [R] Pass on the new UCRT CRAN windows builds
* [ARROW-12520](https://issues.apache.org/jira/browse/ARROW-12520) - [R] Minor docs updates
* [ARROW-12571](https://issues.apache.org/jira/browse/ARROW-12571) - [R][CI] Run nightly R with valgrind
* [ARROW-12578](https://issues.apache.org/jira/browse/ARROW-12578) - [JS] Simplify UTF8 handling in NodeJS
* [ARROW-12619](https://issues.apache.org/jira/browse/ARROW-12619) - [Python] pyarrow sdist should not require git
* [ARROW-12806](https://issues.apache.org/jira/browse/ARROW-12806) - [Python] test\_write\_to\_dataset\_filesystem missing a dataset mark
* [ARROW-13533](https://issues.apache.org/jira/browse/ARROW-13533) - Buy Yellow Xanax Bars R039 | Buy Yellow Xanax Bars 2mg Online With Creditcard



# Apache Arrow 4.0.0 (2021-04-26)

## Bug Fixes

* [ARROW-4784](https://issues.apache.org/jira/browse/ARROW-4784) - [C++][CI] Re-enable flaky mingw tests.
* [ARROW-6818](https://issues.apache.org/jira/browse/ARROW-6818) - [Doc] Format docs confusing
* [ARROW-7288](https://issues.apache.org/jira/browse/ARROW-7288) - [C++][R] read\_parquet() freezes on Windows with Japanese locale
* [ARROW-7830](https://issues.apache.org/jira/browse/ARROW-7830) - [C++] Parquet library version doesn't change with releases
* [ARROW-9451](https://issues.apache.org/jira/browse/ARROW-9451) - [Python] Unsigned integer types will accept string values in pyarrow.array
* [ARROW-9634](https://issues.apache.org/jira/browse/ARROW-9634) - [C++][Python] Restore non-UTC time zones when reading Parquet file that was previously Arrow
* [ARROW-9878](https://issues.apache.org/jira/browse/ARROW-9878) - [Python] table to\_pandas self\_destruct=True + split\_blocks=True cannot prevent doubling memory
* [ARROW-10038](https://issues.apache.org/jira/browse/ARROW-10038) - [C++] SetCpuThreadPoolCapacity(1) spins up nCPUs threads
* [ARROW-10056](https://issues.apache.org/jira/browse/ARROW-10056) - [C++] Increase flatbuffers max\_tables parameter in order to read wide tables
* [ARROW-10364](https://issues.apache.org/jira/browse/ARROW-10364) - [Dev][Archery] Test is failed with semver 2.13.0
* [ARROW-10370](https://issues.apache.org/jira/browse/ARROW-10370) - [Python] Spurious s3fs-related test failures
* [ARROW-10403](https://issues.apache.org/jira/browse/ARROW-10403) - [C++] Implement unique kernel for dictionary type
* [ARROW-10405](https://issues.apache.org/jira/browse/ARROW-10405) - [C++] IsIn kernel should be able to lookup dictionary in string
* [ARROW-10457](https://issues.apache.org/jira/browse/ARROW-10457) - [CI] Fix Spark branch-3.0 integration tests
* [ARROW-10489](https://issues.apache.org/jira/browse/ARROW-10489) - [C++] Unable to configure or make with intel compiler
* [ARROW-10514](https://issues.apache.org/jira/browse/ARROW-10514) - [C++][Parquet] Data inconsistency in parquet-reader output modes
* [ARROW-10953](https://issues.apache.org/jira/browse/ARROW-10953) - [R] Validate when creating Table with schema
* [ARROW-11066](https://issues.apache.org/jira/browse/ARROW-11066) - [Java] Is there a bug in flight AddWritableBuffer
* [ARROW-11066](https://issues.apache.org/jira/browse/ARROW-11066) - [Java] Is there a bug in flight AddWritableBuffer
* [ARROW-11066](https://issues.apache.org/jira/browse/ARROW-11066) - [Java] Is there a bug in flight AddWritableBuffer
* [ARROW-11066](https://issues.apache.org/jira/browse/ARROW-11066) - [Java] Is there a bug in flight AddWritableBuffer
* [ARROW-11066](https://issues.apache.org/jira/browse/ARROW-11066) - [Java] Is there a bug in flight AddWritableBuffer
* [ARROW-11134](https://issues.apache.org/jira/browse/ARROW-11134) - [C++][CI] ARM64 job on Travis-CI doesn't run tests
* [ARROW-11147](https://issues.apache.org/jira/browse/ARROW-11147) - [Python][CI] Parquet tests failing in nightly build with Dask master
* [ARROW-11180](https://issues.apache.org/jira/browse/ARROW-11180) - [Developer] cmake-format pre-commit hook doesn't run
* [ARROW-11192](https://issues.apache.org/jira/browse/ARROW-11192) - [Documentation] Describe opening Visual Studio so it inherits a working env
* [ARROW-11223](https://issues.apache.org/jira/browse/ARROW-11223) - [Java] BaseVariableWidthVector/BaseLargeVariableWidthVector setNull and getBufferSizeFor is buggy
* [ARROW-11235](https://issues.apache.org/jira/browse/ARROW-11235) - [Python] S3 test failures inside non-default regions
* [ARROW-11239](https://issues.apache.org/jira/browse/ARROW-11239) - [Rust] array::transform::tests::test\_struct failed
* [ARROW-11269](https://issues.apache.org/jira/browse/ARROW-11269) - [Rust] Unable to read Parquet file because of mismatch in column-derived and embedded schemas
* [ARROW-11277](https://issues.apache.org/jira/browse/ARROW-11277) - [C++] Fix compilation error in dataset expressions on macOS 10.11
* [ARROW-11299](https://issues.apache.org/jira/browse/ARROW-11299) - [Python] build warning in python
* [ARROW-11303](https://issues.apache.org/jira/browse/ARROW-11303) - [Release][C++] Enable mimalloc in the windows verification script
* [ARROW-11305](https://issues.apache.org/jira/browse/ARROW-11305) - [Rust]: parquet-rowcount binary tries to open itself as a parquet file
* [ARROW-11311](https://issues.apache.org/jira/browse/ARROW-11311) - [Rust] unset\_bit is toggling bits, not unsetting them
* [ARROW-11313](https://issues.apache.org/jira/browse/ARROW-11313) - [Rust] Size hint of iterators is incorrect
* [ARROW-11315](https://issues.apache.org/jira/browse/ARROW-11315) - [Packaging][APT][arm64] Add missing gir1.2 files
* [ARROW-11320](https://issues.apache.org/jira/browse/ARROW-11320) - [C++] Spurious test failure when creating temporary dir
* [ARROW-11322](https://issues.apache.org/jira/browse/ARROW-11322) - [Rust] Arrow \`memory\` made private is a breaking API change
* [ARROW-11323](https://issues.apache.org/jira/browse/ARROW-11323) - [Rust][DataFusion] ComputeError("concat requires input of at least one array")) with queries with ORDER BY or GROUP BY that return no
* [ARROW-11328](https://issues.apache.org/jira/browse/ARROW-11328) - [R] Collecting zero columns from a dataset returns entire dataset
* [ARROW-11334](https://issues.apache.org/jira/browse/ARROW-11334) - [Python][CI] Nightly pandas builds failing because of internal pandas change
* [ARROW-11337](https://issues.apache.org/jira/browse/ARROW-11337) - [C++] Compilation error with ThreadSanitizer
* [ARROW-11357](https://issues.apache.org/jira/browse/ARROW-11357) - [Rust] take primitive implementation is unsound
* [ARROW-11376](https://issues.apache.org/jira/browse/ARROW-11376) - [C++] ThreadedTaskGroup failure with Thread Sanitizer enabled
* [ARROW-11379](https://issues.apache.org/jira/browse/ARROW-11379) - [C++][Dataset] Reading dataset with filtering on timestamp partition field crashes
* [ARROW-11387](https://issues.apache.org/jira/browse/ARROW-11387) - [Rust] Arrow 3.0.0 release with simd feature doesn't compile without feature=avx512.
* [ARROW-11391](https://issues.apache.org/jira/browse/ARROW-11391) - [C++] HdfsOutputStream::Write unsafely truncates integers exceeding INT32\_MAX
* [ARROW-11394](https://issues.apache.org/jira/browse/ARROW-11394) - [Rust] Slice + Concat incorrect for structs
* [ARROW-11400](https://issues.apache.org/jira/browse/ARROW-11400) - [Python] Pickled ParquetFileFragment has invalid partition\_expresion with dictionary type in pyarrow 2.0
* [ARROW-11403](https://issues.apache.org/jira/browse/ARROW-11403) - [Developer] archery benchmark list: unexpected keyword 'benchmark\_filter'
* [ARROW-11412](https://issues.apache.org/jira/browse/ARROW-11412) - [Python] Expressions not working with logical boolean operators  (and, or, not)
* [ARROW-11412](https://issues.apache.org/jira/browse/ARROW-11412) - [Python] Expressions not working with logical boolean operators  (and, or, not)
* [ARROW-11427](https://issues.apache.org/jira/browse/ARROW-11427) - [C++] Arrow uses AVX512 instructions even when not supported by the OS
* [ARROW-11448](https://issues.apache.org/jira/browse/ARROW-11448) - [C++] tdigest build failure on Windows with Visual Studio
* [ARROW-11451](https://issues.apache.org/jira/browse/ARROW-11451) - [C++] Fix gcc-4.8 build error
* [ARROW-11452](https://issues.apache.org/jira/browse/ARROW-11452) - [Rust] Parquet reader cannot read file where a struct column has the same name as struct member columns
* [ARROW-11461](https://issues.apache.org/jira/browse/ARROW-11461) - [Flight][Go] GetSchema does not work with Java Flight Server
* [ARROW-11464](https://issues.apache.org/jira/browse/ARROW-11464) - [Python] pyarrow.parquet.read\_pandas doesn't conform to its docs
* [ARROW-11470](https://issues.apache.org/jira/browse/ARROW-11470) - [C++] Overflow occurs on integer multiplications in ComputeRowMajorStrides, ComputeColumnMajorStrides, and CheckTensorStridesValidity
* [ARROW-11472](https://issues.apache.org/jira/browse/ARROW-11472) - [Python][CI] Kartothek integrations build is failing with numpy 1.20
* [ARROW-11472](https://issues.apache.org/jira/browse/ARROW-11472) - [Python][CI] Kartothek integrations build is failing with numpy 1.20
* [ARROW-11480](https://issues.apache.org/jira/browse/ARROW-11480) - [Python] Segmentation fault reading parquet with date filter with INT96 column
* [ARROW-11483](https://issues.apache.org/jira/browse/ARROW-11483) - [Java][C++][Integration] C++ integration test creates JSON files incompatible with Java
* [ARROW-11488](https://issues.apache.org/jira/browse/ARROW-11488) - [Rust]: StructBuilder's Drop impl leaks memory
* [ARROW-11490](https://issues.apache.org/jira/browse/ARROW-11490) - [C++] BM\_ArrowBinaryDict/EncodeLowLevel is not deterministic
* [ARROW-11494](https://issues.apache.org/jira/browse/ARROW-11494) - [Rust] Fix take bench
* [ARROW-11497](https://issues.apache.org/jira/browse/ARROW-11497) - [Python] pyarrow parquet writer for list does not conform with Apache Parquet specification
* [ARROW-11538](https://issues.apache.org/jira/browse/ARROW-11538) - [Python] Segfault reading Parquet dataset with Timestamp filter
* [ARROW-11547](https://issues.apache.org/jira/browse/ARROW-11547) - [Packaging][Conda][Drone] Nightly builds are failed by undefined variable error
* [ARROW-11548](https://issues.apache.org/jira/browse/ARROW-11548) - [C++] RandomArrayGenerator::List size mismatch
* [ARROW-11551](https://issues.apache.org/jira/browse/ARROW-11551) - [C++][Gandiva] castTIMESTAMP(utf8) function doesn't show error out for invalid inputs
* [ARROW-11560](https://issues.apache.org/jira/browse/ARROW-11560) - [FlightRPC][C++][Python] Interrupting a Flight server results in abort
* [ARROW-11567](https://issues.apache.org/jira/browse/ARROW-11567) - [C++][Compute] Variance kernel has precision issue
* [ARROW-11577](https://issues.apache.org/jira/browse/ARROW-11577) - [Rust] Concat kernel panics on slices of string arrays
* [ARROW-11582](https://issues.apache.org/jira/browse/ARROW-11582) - [R] write\_dataset "format" argument default and validation could be better
* [ARROW-11586](https://issues.apache.org/jira/browse/ARROW-11586) - [Rust] [Datafusion] Invalid SQL sometimes panics
* [ARROW-11595](https://issues.apache.org/jira/browse/ARROW-11595) - [C++][NIGHTLY:test-conda-cpp-valgrind] GenerateBitsUnrolled triggers valgrind on uninit inputs
* [ARROW-11596](https://issues.apache.org/jira/browse/ARROW-11596) - [Python][Dataset] SIGSEGV when executing scan tasks with Python executors
* [ARROW-11603](https://issues.apache.org/jira/browse/ARROW-11603) - [Rust] Fix clippy error
* [ARROW-11607](https://issues.apache.org/jira/browse/ARROW-11607) - [Python] Error when reading table with list values from parquet
* [ARROW-11614](https://issues.apache.org/jira/browse/ARROW-11614) - [C++][Gandiva] Fix round() logic to return positive zero when argument is zero
* [ARROW-11617](https://issues.apache.org/jira/browse/ARROW-11617) - [C++][Gandiva] Fix nested if-else optimisation in gandiva
* [ARROW-11620](https://issues.apache.org/jira/browse/ARROW-11620) - [Rust] [DataFusion] Inconsistent use of Box and Arc for TableProvider
* [ARROW-11630](https://issues.apache.org/jira/browse/ARROW-11630) - [Rust] Introduce partial\_sort and limit option for sort kernel
* [ARROW-11632](https://issues.apache.org/jira/browse/ARROW-11632) - [Rust] csv::Reader doesn't propagate schema metadata to RecordBatches
* [ARROW-11639](https://issues.apache.org/jira/browse/ARROW-11639) - [C++][Gandiva] Fix signbit compilation issue in Ubuntu nightly build
* [ARROW-11642](https://issues.apache.org/jira/browse/ARROW-11642) - [C++] Incorrect preprocessor directive for Windows in JVM detection
* [ARROW-11657](https://issues.apache.org/jira/browse/ARROW-11657) - [R] group\_by with .drop specified errors
* [ARROW-11658](https://issues.apache.org/jira/browse/ARROW-11658) - [R] Handle mutate/rename inside group\_by
* [ARROW-11663](https://issues.apache.org/jira/browse/ARROW-11663) - [DataFusion] Master does not compile
* [ARROW-11668](https://issues.apache.org/jira/browse/ARROW-11668) - [C++] Sporadic UBSAN error in FutureStessTest.TryAddCallback
* [ARROW-11672](https://issues.apache.org/jira/browse/ARROW-11672) - [R] Fix string function test failure on R 3.3
* [ARROW-11681](https://issues.apache.org/jira/browse/ARROW-11681) - [Rust] IPC writers shouldn't unwrap in destructors
* [ARROW-11686](https://issues.apache.org/jira/browse/ARROW-11686) - [C++]flight-test-integration-client sometimes exits by SIGABRT but does not print the stack trace
* [ARROW-11687](https://issues.apache.org/jira/browse/ARROW-11687) - [Rust][DataFusion] RepartitionExec Hanging
* [ARROW-11694](https://issues.apache.org/jira/browse/ARROW-11694) - [C++] Array Take may dereference absent null bitmap
* [ARROW-11695](https://issues.apache.org/jira/browse/ARROW-11695) - [C++][FlightRPC][Packaging] Update support for disabling TLS server verification for recent gRPC versions
* [ARROW-11717](https://issues.apache.org/jira/browse/ARROW-11717) - [Integration] Intermittent (but frequent) flight integration failures with auth:basic\_proto
* [ARROW-11718](https://issues.apache.org/jira/browse/ARROW-11718) - [Rust] IPC writers shouldn't implicitly finish on drop
* [ARROW-11741](https://issues.apache.org/jira/browse/ARROW-11741) - [C++] Decimal cast failure on big-endian
* [ARROW-11743](https://issues.apache.org/jira/browse/ARROW-11743) - [R] Use pkgdown's new found ability to autolink Jiras
* [ARROW-11746](https://issues.apache.org/jira/browse/ARROW-11746) - [Developer][Archery] Fix prefer real time check
* [ARROW-11756](https://issues.apache.org/jira/browse/ARROW-11756) - [R] passing a partition as a schema leads to segfaults
* [ARROW-11758](https://issues.apache.org/jira/browse/ARROW-11758) - [C++][Compute] Summation kernel round-off error
* [ARROW-11767](https://issues.apache.org/jira/browse/ARROW-11767) - [C++] Scalar::hash may segfault for null scalars
* [ARROW-11771](https://issues.apache.org/jira/browse/ARROW-11771) - [Developer][Archery] Move benchmark tests (so CI runs them)
* [ARROW-11781](https://issues.apache.org/jira/browse/ARROW-11781) - [Python] Reading small amount of files from a partitioned dataset is unexpectedly slow
* [ARROW-11784](https://issues.apache.org/jira/browse/ARROW-11784) - [Rust][DataFusion] CoalesceBatchesStream doesn't honor Stream interface
* [ARROW-11785](https://issues.apache.org/jira/browse/ARROW-11785) - [R] Fallback when filtering Table with unsupported expression fails
* [ARROW-11786](https://issues.apache.org/jira/browse/ARROW-11786) - [C++] CMake output noisy
* [ARROW-11788](https://issues.apache.org/jira/browse/ARROW-11788) - [Java] Appending Empty List Vector yields NPE
* [ARROW-11791](https://issues.apache.org/jira/browse/ARROW-11791) - [Rust][DataFusion] RepartitionExec Blocking
* [ARROW-11802](https://issues.apache.org/jira/browse/ARROW-11802) - [Rust][DataFusion] Mixing of crossbeam channel and async tasks can lead to deadlock
* [ARROW-11819](https://issues.apache.org/jira/browse/ARROW-11819) - [Rust] Add link to the doc
* [ARROW-11821](https://issues.apache.org/jira/browse/ARROW-11821) - [Rust] Edit Rust README
* [ARROW-11830](https://issues.apache.org/jira/browse/ARROW-11830) - [C++] gRPC compilation tests occur every time
* [ARROW-11832](https://issues.apache.org/jira/browse/ARROW-11832) - [R] Handle conversion of extra nested struct column
* [ARROW-11836](https://issues.apache.org/jira/browse/ARROW-11836) - Target libarrow\_bundled\_dependencies.a is not alreay created but is already required.
* [ARROW-11845](https://issues.apache.org/jira/browse/ARROW-11845) - [Rust] Debug implementation of Date32Array panics if array contains negative values
* [ARROW-11850](https://issues.apache.org/jira/browse/ARROW-11850) - [GLib] GARROW\_VERSION\_0\_16 macro is missing
* [ARROW-11855](https://issues.apache.org/jira/browse/ARROW-11855) - [C++] [Python] Memory leak in to\_pandas when converting chunked struct array
* [ARROW-11857](https://issues.apache.org/jira/browse/ARROW-11857) - [Python] Resource temporarily unavailable when using the new Dataset API with Pandas
* [ARROW-11860](https://issues.apache.org/jira/browse/ARROW-11860) - [Rust] [DataFusion] Add DataFusion logos
* [ARROW-11866](https://issues.apache.org/jira/browse/ARROW-11866) - [C++] Arrow Flight SetShutdownOnSignals cause potential mutex deadlock in gRPC
* [ARROW-11872](https://issues.apache.org/jira/browse/ARROW-11872) - [C++] Array Validation of GPU buffers fails due to incorrect validation check
* [ARROW-11880](https://issues.apache.org/jira/browse/ARROW-11880) - [R] Handle empty or NULL transmute() args properly
* [ARROW-11881](https://issues.apache.org/jira/browse/ARROW-11881) - [Rust][DataFusion] Fix Clippy Lint
* [ARROW-11896](https://issues.apache.org/jira/browse/ARROW-11896) - [Rust] Hang / failure in CI on AMD64 Debian 10 Rust stable test workspace
* [ARROW-11904](https://issues.apache.org/jira/browse/ARROW-11904) - [C++] "pure virtual method called" crash at the end of arrow-csv-test
* [ARROW-11905](https://issues.apache.org/jira/browse/ARROW-11905) - [C++] SIMD info always returning none on MacOS
* [ARROW-11914](https://issues.apache.org/jira/browse/ARROW-11914) - [R] [CI] r-sanitizer nightly is broken
* [ARROW-11918](https://issues.apache.org/jira/browse/ARROW-11918) - [R] [Documentation] Docs cleanups
* [ARROW-11923](https://issues.apache.org/jira/browse/ARROW-11923) - [CI] Update branch name for dask dev integration tests
* [ARROW-11937](https://issues.apache.org/jira/browse/ARROW-11937) - [C++] GZip codec hangs if flushed twice
* [ARROW-11941](https://issues.apache.org/jira/browse/ARROW-11941) - [Dev] "DEBUG=1 merge\_arrow\_pr.py" updates Jira issue
* [ARROW-11942](https://issues.apache.org/jira/browse/ARROW-11942) - [C++] If tasks are submitted quickly the thread pool may fail to spin up new threads
* [ARROW-11945](https://issues.apache.org/jira/browse/ARROW-11945) - [R] filter doesn't accept negative numbers as valid
* [ARROW-11956](https://issues.apache.org/jira/browse/ARROW-11956) - [C++] Fix system re2 dependency detection for static library
* [ARROW-11965](https://issues.apache.org/jira/browse/ARROW-11965) - [R][Docs] Fix install.packages command in R dev docs
* [ARROW-11970](https://issues.apache.org/jira/browse/ARROW-11970) - [C++][CI] Fix Valgrind failures
* [ARROW-11971](https://issues.apache.org/jira/browse/ARROW-11971) - [Packaging] Vcpkg patch doesn't apply on windows due to line endings
* [ARROW-11975](https://issues.apache.org/jira/browse/ARROW-11975) - [CI][GLib] Failed to update gcc
* [ARROW-11976](https://issues.apache.org/jira/browse/ARROW-11976) - [C++] Sporadic TSAN error in TestThreadPool.SetCapacity
* [ARROW-11983](https://issues.apache.org/jira/browse/ARROW-11983) - [Python] ImportError calling pyarrow from\_pandas within ThreadPool
* [ARROW-11997](https://issues.apache.org/jira/browse/ARROW-11997) - [Python] concat\_tables crashes python interpreter
* [ARROW-12003](https://issues.apache.org/jira/browse/ARROW-12003) - [R] Fix NOTE re undefined global function group\_by\_drop\_default
* [ARROW-12006](https://issues.apache.org/jira/browse/ARROW-12006) - [Java] Fix checkstyle config to work on Windows
* [ARROW-12012](https://issues.apache.org/jira/browse/ARROW-12012) - [Java] [JDBC] BinaryConsumer cannot reallocate memory correctly
* [ARROW-12013](https://issues.apache.org/jira/browse/ARROW-12013) - [C++][FlightRPC] Failed to detect gRPC version
* [ARROW-12015](https://issues.apache.org/jira/browse/ARROW-12015) - [Rust] [DataFusion] Integrate doc-comment crate to ensure readme examples remain valid
* [ARROW-12028](https://issues.apache.org/jira/browse/ARROW-12028) - [Rust][DataFusion] Unsupported GROUP BY for Timestamp(Millisecond, None)
* [ARROW-12029](https://issues.apache.org/jira/browse/ARROW-12029) - Remove args from FeatherReader$create v2
* [ARROW-12033](https://issues.apache.org/jira/browse/ARROW-12033) - [Docs] Fix link in developers/benchmarks.html
* [ARROW-12041](https://issues.apache.org/jira/browse/ARROW-12041) - [C++] Fix string description of tensor IPC messages
* [ARROW-12051](https://issues.apache.org/jira/browse/ARROW-12051) - [GLib] Intermittent CI failure in test\_add\_column\_type(TestCSVReader::\#read::options)
* [ARROW-12057](https://issues.apache.org/jira/browse/ARROW-12057) - [Python] Remove direct usage of pandas' Block subclasses
* [ARROW-12065](https://issues.apache.org/jira/browse/ARROW-12065) - [C++][Python] Segfault reading JSON file
* [ARROW-12067](https://issues.apache.org/jira/browse/ARROW-12067) - [Python][Doc] Document pyarrow\_(un)wrap\_scalar
* [ARROW-12073](https://issues.apache.org/jira/browse/ARROW-12073) - [R] Fix R CMD check NOTE about ‘X\_\_\_\_\_X’
* [ARROW-12076](https://issues.apache.org/jira/browse/ARROW-12076) - [Rust] Fix build
* [ARROW-12077](https://issues.apache.org/jira/browse/ARROW-12077) - [C++] Out-of-bounds write in ListArray::FromArrays
* [ARROW-12086](https://issues.apache.org/jira/browse/ARROW-12086) - [C++] offline builds does not use ARROW\_$LIBRARY\_URL to search for packages
* [ARROW-12088](https://issues.apache.org/jira/browse/ARROW-12088) - [Python][C++] Warning about offsetof in pyarrow.dataset.RecordBatchIterator
* [ARROW-12089](https://issues.apache.org/jira/browse/ARROW-12089) - [Doc] Fix warnings when building Sphinx docs
* [ARROW-12100](https://issues.apache.org/jira/browse/ARROW-12100) - [C\#] Cannot round-trip record batch with PyArrow
* [ARROW-12103](https://issues.apache.org/jira/browse/ARROW-12103) - [C++] "load of misaligned address" in Parquet reader
* [ARROW-12112](https://issues.apache.org/jira/browse/ARROW-12112) - [CI] No space left on device - AMD64 Conda Integration test
* [ARROW-12112](https://issues.apache.org/jira/browse/ARROW-12112) - [CI] No space left on device - AMD64 Conda Integration test
* [ARROW-12113](https://issues.apache.org/jira/browse/ARROW-12113) - [R] Fix rlang deprecation warning from check\_select\_helpers()
* [ARROW-12130](https://issues.apache.org/jira/browse/ARROW-12130) - [C++] Arm64 buid failed if -DARROW\_SIMD\_LEVEL=NONE
* [ARROW-12138](https://issues.apache.org/jira/browse/ARROW-12138) - [Go][IPC]
* [ARROW-12140](https://issues.apache.org/jira/browse/ARROW-12140) - [C++][CI] Valgrind failure on Grouper tests
* [ARROW-12145](https://issues.apache.org/jira/browse/ARROW-12145) - [Developer][Archery] Flaky test: test\_static\_runner\_from\_json
* [ARROW-12149](https://issues.apache.org/jira/browse/ARROW-12149) - [Dev] Archery benchmark test case is failing
* [ARROW-12154](https://issues.apache.org/jira/browse/ARROW-12154) - [C++][Gandiva] Fix gandiva crash in certain OS/CPU combinations
* [ARROW-12155](https://issues.apache.org/jira/browse/ARROW-12155) - [R] Require Table columns to be same length
* [ARROW-12161](https://issues.apache.org/jira/browse/ARROW-12161) - [C++][R] Async streaming CSV reader deadlocking when being run synchronously from datasets
* [ARROW-12161](https://issues.apache.org/jira/browse/ARROW-12161) - [C++][R] Async streaming CSV reader deadlocking when being run synchronously from datasets
* [ARROW-12169](https://issues.apache.org/jira/browse/ARROW-12169) - [C++] Fix compressed file reading with an empty stream at end of file
* [ARROW-12171](https://issues.apache.org/jira/browse/ARROW-12171) - [Rust] Clippy error
* [ARROW-12172](https://issues.apache.org/jira/browse/ARROW-12172) - [Python][Packaging] Pass python version as setuptools pretend version in the macOS wheel builds
* [ARROW-12178](https://issues.apache.org/jira/browse/ARROW-12178) - [CI] Update setuptools in the ubuntu images
* [ARROW-12186](https://issues.apache.org/jira/browse/ARROW-12186) - [Rust][DataFusion] Fix regexp\_match test
* [ARROW-12209](https://issues.apache.org/jira/browse/ARROW-12209) - [JS] @apache-arrow/ts nor apache-arrow does not compile
* [ARROW-12220](https://issues.apache.org/jira/browse/ARROW-12220) - [C++][CI] Thread sanitizer failure
* [ARROW-12226](https://issues.apache.org/jira/browse/ARROW-12226) - [C++] ASAN error in s3fs\_test.cc
* [ARROW-12227](https://issues.apache.org/jira/browse/ARROW-12227) - [R] Fix RE2 and median nightly build failures
* [ARROW-12235](https://issues.apache.org/jira/browse/ARROW-12235) - [Rust][DataFusion] LIMIT returns incorrect results when used with several small partitions
* [ARROW-12241](https://issues.apache.org/jira/browse/ARROW-12241) - [Python] Parallel csv reader cancellation test kills pytest
* [ARROW-12250](https://issues.apache.org/jira/browse/ARROW-12250) - [Rust] Failing test arrow::arrow\_writer::tests::fixed\_size\_binary\_single\_column
* [ARROW-12254](https://issues.apache.org/jira/browse/ARROW-12254) - [Rust][DataFusion] Limit keeps polling input after limit is reached
* [ARROW-12258](https://issues.apache.org/jira/browse/ARROW-12258) - [R] Never do as.data.frame() on collect(as\_data\_frame = FALSE)
* [ARROW-12262](https://issues.apache.org/jira/browse/ARROW-12262) - [Doc][C++][Python] Docs built and pushed with S3 and Flight disabled
* [ARROW-12267](https://issues.apache.org/jira/browse/ARROW-12267) - [Rust] JSON writer does not support timestamp types
* [ARROW-12273](https://issues.apache.org/jira/browse/ARROW-12273) - [JS] Coveralls does not work anymore
* [ARROW-12279](https://issues.apache.org/jira/browse/ARROW-12279) - [Rust][DataFusion] Add test for null handling in hash join (ARROW-12266)
* [ARROW-12294](https://issues.apache.org/jira/browse/ARROW-12294) - [Rust] Fix Boolean Kleene Kernels with no Remainder
* [ARROW-12299](https://issues.apache.org/jira/browse/ARROW-12299) - [Python] pq.write\_to\_dataset does not recognize S3FileSystem
* [ARROW-12300](https://issues.apache.org/jira/browse/ARROW-12300) - [C++] ArrowCUDA erroneously links to CUDA Runtime while only using CUDA Driver API
* [ARROW-12313](https://issues.apache.org/jira/browse/ARROW-12313) - [Rust] [Ballista] Benchmark documentation out of date
* [ARROW-12314](https://issues.apache.org/jira/browse/ARROW-12314) - [Python] pq.read\_pandas with use\_legacy\_dataset=False does not accept columns as a set (kartothek integration failure)
* [ARROW-12327](https://issues.apache.org/jira/browse/ARROW-12327) - [Dev] Use pull request's head remote when submitting crossbow jobs via the comment bot
* [ARROW-12330](https://issues.apache.org/jira/browse/ARROW-12330) - [Developer] Restore values in counters column of Archery benchmark
* [ARROW-12334](https://issues.apache.org/jira/browse/ARROW-12334) - [Rust] [Ballista] Aggregate queries producing incorrect results
* [ARROW-12342](https://issues.apache.org/jira/browse/ARROW-12342) - [Packaging] Fix tabulation in crossbow templates for submitting nightly builds
* [ARROW-12357](https://issues.apache.org/jira/browse/ARROW-12357) - [Archery] Error running "crossbow submit ..."
* [ARROW-12379](https://issues.apache.org/jira/browse/ARROW-12379) - [C++][CI] Thread sanitizer failure in SerialExecutor
* [ARROW-12382](https://issues.apache.org/jira/browse/ARROW-12382) - [C++][CI] Conda nightly jobs fail due to not bundling xsimd
* [ARROW-12385](https://issues.apache.org/jira/browse/ARROW-12385) - [R] [CI] fix cran picking in CI
* [ARROW-12390](https://issues.apache.org/jira/browse/ARROW-12390) - [Rust] Inline Inline from\_trusted\_len\_iter, try\_from\_trusted\_len\_iter, extend\_from\_slice
* [ARROW-12401](https://issues.apache.org/jira/browse/ARROW-12401) - [R] Fix guard around dataset\_\_\_Scanner\_\_TakeRows
* [ARROW-12405](https://issues.apache.org/jira/browse/ARROW-12405) - [Packaging] Fix apt artifact patterns and artifact uploading from travis
* [ARROW-12408](https://issues.apache.org/jira/browse/ARROW-12408) - [R] Delete Scan() bindings
* [ARROW-12421](https://issues.apache.org/jira/browse/ARROW-12421) - [Rust] [DataFusion] topk\_query test fails in master
* [ARROW-12421](https://issues.apache.org/jira/browse/ARROW-12421) - [Rust] [DataFusion] topk\_query test fails in master
* [ARROW-12429](https://issues.apache.org/jira/browse/ARROW-12429) - [C++] MergedGeneratorTestFixture is incorrectly instantiated
* [ARROW-12433](https://issues.apache.org/jira/browse/ARROW-12433) - [Rust] Builds failing due to new flatbuffer release introducing const generics
* [ARROW-12437](https://issues.apache.org/jira/browse/ARROW-12437) - [Rust] [Ballista] Ballista plans must not include RepartitionExec
* [ARROW-12440](https://issues.apache.org/jira/browse/ARROW-12440) - [Release] Various packaging, release script and release verification script fixes
* [ARROW-12466](https://issues.apache.org/jira/browse/ARROW-12466) - [Python] Comparing array to None raises error
* [ARROW-12475](https://issues.apache.org/jira/browse/ARROW-12475) - [C++] Build warning from thread\_pool\_benchmark.cc
* [ARROW-12487](https://issues.apache.org/jira/browse/ARROW-12487) - [C++][Dataset] ScanBatches() hangs if there's an error during scanning
* [ARROW-12495](https://issues.apache.org/jira/browse/ARROW-12495) - [C++][Python] NumPy buffer sets is\_mutable\_ to true but does not set mutable\_data\_ when the NumPy array is writable
* [ARROW-12794](https://issues.apache.org/jira/browse/ARROW-12794) - C++/R: read\_parquet halts process when accessed multiple times
* [PARQUET-1655](https://issues.apache.org/jira/browse/PARQUET-1655) - [C++] Decimal comparisons used for min/max statistics are not correct
* [PARQUET-2008](https://issues.apache.org/jira/browse/PARQUET-2008) - [C++] Wrong information written in RowGroup::total\_byte\_size


## New Features and Improvements

* [ARROW-951](https://issues.apache.org/jira/browse/ARROW-951) - [JS] Fix generated API documentation
* [ARROW-2229](https://issues.apache.org/jira/browse/ARROW-2229) - [C++] Write CSV files from RecordBatch, Table
* [ARROW-3690](https://issues.apache.org/jira/browse/ARROW-3690) - [Rust] Add Rust to the format integration testing
* [ARROW-6103](https://issues.apache.org/jira/browse/ARROW-6103) - [Java] Stop using the maven release plugin
* [ARROW-6248](https://issues.apache.org/jira/browse/ARROW-6248) - [Python] Use FileNotFoundError in HadoopFileSystem.open() in Python 3
* [ARROW-6455](https://issues.apache.org/jira/browse/ARROW-6455) - [C++] Implement ExtensionType for non-UTF8 Unicode data
* [ARROW-6604](https://issues.apache.org/jira/browse/ARROW-6604) - [C++] Add support for nested types to MakeArrayFromScalar
* [ARROW-7215](https://issues.apache.org/jira/browse/ARROW-7215) - [C++][Gandiva] Implement castVARCHAR(numeric\_type) functions in Gandiva
* [ARROW-7364](https://issues.apache.org/jira/browse/ARROW-7364) - [Rust] Add cast options to cast kernel
* [ARROW-7633](https://issues.apache.org/jira/browse/ARROW-7633) - [C++][CI] Create fuzz targets for tensors and sparse tensors
* [ARROW-7808](https://issues.apache.org/jira/browse/ARROW-7808) - [Java][Dataset] Implement Datasets Java API
* [ARROW-7906](https://issues.apache.org/jira/browse/ARROW-7906) - [C++][Python] Full functionality for ORC format
* [ARROW-8049](https://issues.apache.org/jira/browse/ARROW-8049) - [C++] Upgrade bundled Thrift version to 0.13.0
* [ARROW-8282](https://issues.apache.org/jira/browse/ARROW-8282) - [C++/Python][Dataset] Support schema evolution for integer columns
* [ARROW-8284](https://issues.apache.org/jira/browse/ARROW-8284) - [C++][Dataset] Schema evolution for timestamp columns
* [ARROW-8630](https://issues.apache.org/jira/browse/ARROW-8630) - [C++][Dataset] Pass schema including all materialized fields to catch CSV edge cases
* [ARROW-8631](https://issues.apache.org/jira/browse/ARROW-8631) - [C++][Dataset] Add ConvertOptions and ReadOptions to CsvFileFormat
* [ARROW-8658](https://issues.apache.org/jira/browse/ARROW-8658) - [C++][Dataset] Implement subtree pruning for FileSystemDataset::GetFragments
* [ARROW-8672](https://issues.apache.org/jira/browse/ARROW-8672) - [Java] Implement RecordBatch IPC buffer compression from ARROW-300
* [ARROW-8732](https://issues.apache.org/jira/browse/ARROW-8732) - [C++] Let Futures support cancellation
* [ARROW-8771](https://issues.apache.org/jira/browse/ARROW-8771) - [C++] Add boost/process library to build support
* [ARROW-8796](https://issues.apache.org/jira/browse/ARROW-8796) - [Rust] Allow parquet to be written directly to memory
* [ARROW-8797](https://issues.apache.org/jira/browse/ARROW-8797) - [C++] Support Flight RPC among diffent endian platforms
* [ARROW-8900](https://issues.apache.org/jira/browse/ARROW-8900) - [C++] Respect HTTP(S)\_PROXY for S3 Filesystems and/or expose proxy options as parameters
* [ARROW-8919](https://issues.apache.org/jira/browse/ARROW-8919) - [C++] Add "DispatchBest" APIs to compute::Function that selects a kernel that may require implicit casts to invoke
* [ARROW-9128](https://issues.apache.org/jira/browse/ARROW-9128) - [C++] Implement string space trimming kernels: trim, ltrim, and rtrim
* [ARROW-9149](https://issues.apache.org/jira/browse/ARROW-9149) - [C++] Improve configurability of RandomArrayGenerator::ArrayOf
* [ARROW-9196](https://issues.apache.org/jira/browse/ARROW-9196) - [C++] Make temporal casts work on Scalar inputs
* [ARROW-9318](https://issues.apache.org/jira/browse/ARROW-9318) - [C++][Parquet] Encryption key management tools
* [ARROW-9731](https://issues.apache.org/jira/browse/ARROW-9731) - [C++][Dataset] Port "head" method from R to C++ Dataset Scanner
* [ARROW-9749](https://issues.apache.org/jira/browse/ARROW-9749) - [C++][Dataset] Extract format-specific scan options from FileFormat
* [ARROW-9777](https://issues.apache.org/jira/browse/ARROW-9777) - [Rust] Implement IPC changes to catch up to 1.0.0 format
* [ARROW-9856](https://issues.apache.org/jira/browse/ARROW-9856) - [R] Add bindings for string compute functions
* [ARROW-10014](https://issues.apache.org/jira/browse/ARROW-10014) - [C++] TaskGroup::Finish should execute tasks
* [ARROW-10089](https://issues.apache.org/jira/browse/ARROW-10089) - [R] inject base class for Array, ChunkedArray and Scalar
* [ARROW-10183](https://issues.apache.org/jira/browse/ARROW-10183) - [C++] Create a ForEach library function that runs on an iterator of futures
* [ARROW-10195](https://issues.apache.org/jira/browse/ARROW-10195) - [C++] Add string struct extract kernel using re2
* [ARROW-10250](https://issues.apache.org/jira/browse/ARROW-10250) - [FlightRPC][C++] Remove default constructor for FlightClientOptions
* [ARROW-10255](https://issues.apache.org/jira/browse/ARROW-10255) - [JS] Reorganize imports and exports to be more friendly to ESM tree-shaking
* [ARROW-10297](https://issues.apache.org/jira/browse/ARROW-10297) - [Rust] Parameter for parquet-read to output data in json format
* [ARROW-10299](https://issues.apache.org/jira/browse/ARROW-10299) - [Rust] Support reading and writing V5 of IPC metadata
* [ARROW-10305](https://issues.apache.org/jira/browse/ARROW-10305) - [R] Filter with regular expressions
* [ARROW-10306](https://issues.apache.org/jira/browse/ARROW-10306) - [C++] Add string replacement kernel
* [ARROW-10349](https://issues.apache.org/jira/browse/ARROW-10349) - [Python] Build and publish aarch64 wheels
* [ARROW-10354](https://issues.apache.org/jira/browse/ARROW-10354) - [Rust] [DataFusion] Add support for regex extract
* [ARROW-10360](https://issues.apache.org/jira/browse/ARROW-10360) - [CI] Bump github actions cache version
* [ARROW-10372](https://issues.apache.org/jira/browse/ARROW-10372) - [C++][Dataset] Read compressed CSVs
* [ARROW-10406](https://issues.apache.org/jira/browse/ARROW-10406) - [C++] Unify dictionaries when writing IPC file in a single shot
* [ARROW-10420](https://issues.apache.org/jira/browse/ARROW-10420) - [C++] FileSystem::OpenInput{File,Stream} should accept a MemoryPool
* [ARROW-10421](https://issues.apache.org/jira/browse/ARROW-10421) - [R] Feather reader/writer should accept a MemoryPool
* [ARROW-10438](https://issues.apache.org/jira/browse/ARROW-10438) - [C++][Dataset] Partitioning::Format on nulls
* [ARROW-10520](https://issues.apache.org/jira/browse/ARROW-10520) - [C++][R] Implement add/remove/replace for RecordBatch
* [ARROW-10570](https://issues.apache.org/jira/browse/ARROW-10570) - [R] Use Converter API to convert SEXP to Array/ChunkedArray
* [ARROW-10580](https://issues.apache.org/jira/browse/ARROW-10580) - [C++] When Validating, ensure DenseUnionArray offsets are increasing
* [ARROW-10606](https://issues.apache.org/jira/browse/ARROW-10606) - [C++][Compute] Support casts to and from Decimal256 type.
* [ARROW-10655](https://issues.apache.org/jira/browse/ARROW-10655) - [C++] Add LRU cache facility
* [ARROW-10734](https://issues.apache.org/jira/browse/ARROW-10734) - [R] Build and test on Solaris
* [ARROW-10735](https://issues.apache.org/jira/browse/ARROW-10735) - [R] Remove arrow-without-arrow wrapping
* [ARROW-10766](https://issues.apache.org/jira/browse/ARROW-10766) - [Rust] Compute nested definition and repetition for list arrays
* [ARROW-10816](https://issues.apache.org/jira/browse/ARROW-10816) - [Rust] [DataFusion] Implement INTERVAL
* [ARROW-10831](https://issues.apache.org/jira/browse/ARROW-10831) - [C++][Compute] Implemement quantile kernel
* [ARROW-10846](https://issues.apache.org/jira/browse/ARROW-10846) - [C++] Add async filesystem operations
* [ARROW-10880](https://issues.apache.org/jira/browse/ARROW-10880) - [Java] Support compressing RecordBatch IPC buffers by LZ4
* [ARROW-10882](https://issues.apache.org/jira/browse/ARROW-10882) - [Python][Dataset] Writing dataset from python iterator of record batches
* [ARROW-10895](https://issues.apache.org/jira/browse/ARROW-10895) - [C++][Gandiva] Implement bool to varchar cast function in Gandiva
* [ARROW-10903](https://issues.apache.org/jira/browse/ARROW-10903) - [Rust] Implement FromIter<Option<Vec<u8\>\>\> constructor for FixedSizeBinaryArray
* [ARROW-11022](https://issues.apache.org/jira/browse/ARROW-11022) - [Rust] [DataFusion] Upgrade to tokio 1.0
* [ARROW-11070](https://issues.apache.org/jira/browse/ARROW-11070) - [C++] Implement power / exponentiation compute kernel
* [ARROW-11074](https://issues.apache.org/jira/browse/ARROW-11074) - [Rust][DataFusion] Implement predicate push-down for parquet tables
* [ARROW-11081](https://issues.apache.org/jira/browse/ARROW-11081) - [Java] Make IPC option immutable
* [ARROW-11108](https://issues.apache.org/jira/browse/ARROW-11108) - [Rust] Improve performance of MutableBuffer
* [ARROW-11141](https://issues.apache.org/jira/browse/ARROW-11141) - [Rust]: Miri checks
* [ARROW-11149](https://issues.apache.org/jira/browse/ARROW-11149) - [Rust] create\_batch\_empty - support List, LargeList
* [ARROW-11150](https://issues.apache.org/jira/browse/ARROW-11150) - [Rust] Set up bi-weekly Rust sync call and update website
* [ARROW-11154](https://issues.apache.org/jira/browse/ARROW-11154) - [CI][C++] Move homebrew crossbow tests off of Travis-CI
* [ARROW-11156](https://issues.apache.org/jira/browse/ARROW-11156) - [Rust][DataFusion] Create hashes vectorized in hash join
* [ARROW-11174](https://issues.apache.org/jira/browse/ARROW-11174) - [C++][Dataset] Make Expressions available for projection
* [ARROW-11179](https://issues.apache.org/jira/browse/ARROW-11179) - [Format] Make comments in fb files friendly to rust doc
* [ARROW-11183](https://issues.apache.org/jira/browse/ARROW-11183) - [Rust] [Parquet] LogicalType::TIMESTAMP\_NANOS missing
* [ARROW-11191](https://issues.apache.org/jira/browse/ARROW-11191) - [C++] Use FnOnce for TaskGroup's tasks instead of std::function
* [ARROW-11216](https://issues.apache.org/jira/browse/ARROW-11216) - [Rust] Improve documentation for StringDictionaryBuilder
* [ARROW-11220](https://issues.apache.org/jira/browse/ARROW-11220) - [Rust] DF Implement GROUP BY support for Boolean
* [ARROW-11222](https://issues.apache.org/jira/browse/ARROW-11222) - [Rust] [Arrow] catch up with flatbuffers 0.8.1
* [ARROW-11246](https://issues.apache.org/jira/browse/ARROW-11246) - DF - Add type to Unexpected accumulator state message
* [ARROW-11254](https://issues.apache.org/jira/browse/ARROW-11254) - [Rust][DataFusion] Add SIMD and snmalloc flags as options to benchmarks
* [ARROW-11260](https://issues.apache.org/jira/browse/ARROW-11260) - [C++][Dataset] Don't require dictionaries for reading dataset with schema-based Partitioning
* [ARROW-11265](https://issues.apache.org/jira/browse/ARROW-11265) - [Rust] Made bool not convertable to bytes
* [ARROW-11268](https://issues.apache.org/jira/browse/ARROW-11268) - [Rust][DataFusion] Support specifying repartitions in MemTable
* [ARROW-11270](https://issues.apache.org/jira/browse/ARROW-11270) - [Rust] Use slices for simple array data buffer access
* [ARROW-11279](https://issues.apache.org/jira/browse/ARROW-11279) - [Rust][Parquet] ArrowWriter Definition Levels Memory Usage
* [ARROW-11284](https://issues.apache.org/jira/browse/ARROW-11284) - [R] Support dplyr verb transmute()
* [ARROW-11289](https://issues.apache.org/jira/browse/ARROW-11289) - [Rust] [DataFusion] Support GROUP BY for Dictionary columns
* [ARROW-11290](https://issues.apache.org/jira/browse/ARROW-11290) - [Rust][DataFusion] Address hash aggregate performance with high number of groups
* [ARROW-11291](https://issues.apache.org/jira/browse/ARROW-11291) - [Rust] implement extend for MutableBuffer (from iterator)
* [ARROW-11300](https://issues.apache.org/jira/browse/ARROW-11300) - [Rust][DataFusion] Improve hash aggregate performance with large number of groups in
* [ARROW-11308](https://issues.apache.org/jira/browse/ARROW-11308) - [Rust] [Parquet] Add Arrow decimal array writer
* [ARROW-11309](https://issues.apache.org/jira/browse/ARROW-11309) - [Release][C\#] Use .NET 3.1 for verification
* [ARROW-11310](https://issues.apache.org/jira/browse/ARROW-11310) - [Rust] Implement arrow JSON writer
* [ARROW-11314](https://issues.apache.org/jira/browse/ARROW-11314) -  [Release][APT][Yum] Add support for verifying arm64 packages
* [ARROW-11317](https://issues.apache.org/jira/browse/ARROW-11317) - [Rust] Test the prettyprint feature in CI
* [ARROW-11318](https://issues.apache.org/jira/browse/ARROW-11318) - [Rust] Support pretty printing timestamp, date, and time types
* [ARROW-11319](https://issues.apache.org/jira/browse/ARROW-11319) - [Rust] [DataFusion] Improve test comparisons to record batch
* [ARROW-11321](https://issues.apache.org/jira/browse/ARROW-11321) - [Rust][DataFusion] Fix DataFusion compilation error
* [ARROW-11325](https://issues.apache.org/jira/browse/ARROW-11325) - [Packaging][C\#] Release Apache.Arrow.Flight and Apache.Arrow.Flight.AspNetCore
* [ARROW-11329](https://issues.apache.org/jira/browse/ARROW-11329) - [Rust] Do not rebuild the library on every change
* [ARROW-11330](https://issues.apache.org/jira/browse/ARROW-11330) - [Rust][DataFusion] Add ExpressionVisitor pattern
* [ARROW-11332](https://issues.apache.org/jira/browse/ARROW-11332) - [Rust] Use MutableBuffer in take\_string instead of Vec
* [ARROW-11333](https://issues.apache.org/jira/browse/ARROW-11333) - [Rust] Suport creating arbitrary nested empty arrays
* [ARROW-11336](https://issues.apache.org/jira/browse/ARROW-11336) - [C++][Doc] Improve Developing on Windows docs
* [ARROW-11338](https://issues.apache.org/jira/browse/ARROW-11338) - [R] Bindings for quantile and median
* [ARROW-11340](https://issues.apache.org/jira/browse/ARROW-11340) - [C++] Add vcpkg.json manifest to cpp project root
* [ARROW-11343](https://issues.apache.org/jira/browse/ARROW-11343) - [DataFusion] Simplified example
* [ARROW-11346](https://issues.apache.org/jira/browse/ARROW-11346) - [C++][Compute] Implement quantile kernel benchmark
* [ARROW-11349](https://issues.apache.org/jira/browse/ARROW-11349) - [Rust] Add from\_iter\_values to create arrays from T instead of Option<T\>
* [ARROW-11350](https://issues.apache.org/jira/browse/ARROW-11350) - [C++] Bump dependency versions
* [ARROW-11354](https://issues.apache.org/jira/browse/ARROW-11354) - [Rust] Speed-up casts of dates and times
* [ARROW-11355](https://issues.apache.org/jira/browse/ARROW-11355) - [Rust] Align Date type with spec
* [ARROW-11358](https://issues.apache.org/jira/browse/ARROW-11358) - [Rust] Add benchmark for concatenating small arrays
* [ARROW-11360](https://issues.apache.org/jira/browse/ARROW-11360) - [Rust] [DataFusion] Improve CSV "No files found" error message
* [ARROW-11361](https://issues.apache.org/jira/browse/ARROW-11361) - [Rust] Build buffers from iterator of booleans
* [ARROW-11362](https://issues.apache.org/jira/browse/ARROW-11362) - [Rust][DataFusion] Use iterator APIs in to\_array\_of\_size to improve performance
* [ARROW-11365](https://issues.apache.org/jira/browse/ARROW-11365) - [Rust] [Parquet] Implement parsers for v2 of the text schema
* [ARROW-11366](https://issues.apache.org/jira/browse/ARROW-11366) - [Rust][DataFusion] Add Constant Folding / Support boolean literal in equality expression
* [ARROW-11367](https://issues.apache.org/jira/browse/ARROW-11367) - [C++] Implement approximante quantile utility
* [ARROW-11369](https://issues.apache.org/jira/browse/ARROW-11369) - [DataFusion] Split expressions.rs
* [ARROW-11372](https://issues.apache.org/jira/browse/ARROW-11372) - Support RC verification on macOS-ARM64
* [ARROW-11373](https://issues.apache.org/jira/browse/ARROW-11373) - [Python][Docs] Add example of specifying type for a column when reading csv file
* [ARROW-11374](https://issues.apache.org/jira/browse/ARROW-11374) - [Python] Make legacy pyarrow.filesystem / pyarrow.serialize warnings more visisble
* [ARROW-11375](https://issues.apache.org/jira/browse/ARROW-11375) - [Rust] CI fails due to deprecation warning in clippy
* [ARROW-11377](https://issues.apache.org/jira/browse/ARROW-11377) - [C++][CI] Add ThreadSanitizer nightly build
* [ARROW-11383](https://issues.apache.org/jira/browse/ARROW-11383) - [Rust] use trusted len on bit ops
* [ARROW-11386](https://issues.apache.org/jira/browse/ARROW-11386) - [Release] Fix post documents update script
* [ARROW-11389](https://issues.apache.org/jira/browse/ARROW-11389) - [Rust] Inconsistent comments for datatypes
* [ARROW-11395](https://issues.apache.org/jira/browse/ARROW-11395) - [DataFusion] Support custom optimizations
* [ARROW-11401](https://issues.apache.org/jira/browse/ARROW-11401) - [Rust][DataFusion] Pass slices instead of Vec in DataFrame API
* [ARROW-11404](https://issues.apache.org/jira/browse/ARROW-11404) - [Rust][DataFusion] Upgrade to aHash 0.7
* [ARROW-11405](https://issues.apache.org/jira/browse/ARROW-11405) - [DataFusion] Support multiple custom nodes
* [ARROW-11406](https://issues.apache.org/jira/browse/ARROW-11406) - [CI][C++] Fix caching on Travis-CI builds
* [ARROW-11408](https://issues.apache.org/jira/browse/ARROW-11408) - Add window support to datafusion readme
* [ARROW-11411](https://issues.apache.org/jira/browse/ARROW-11411) - [Packaging][Linux] Disable arm64 nightly builds
* [ARROW-11414](https://issues.apache.org/jira/browse/ARROW-11414) - [Rust] Reduce copies in Schema::try\_merge
* [ARROW-11417](https://issues.apache.org/jira/browse/ARROW-11417) - [Integration] Add integration test for buffer compression
* [ARROW-11418](https://issues.apache.org/jira/browse/ARROW-11418) - [Doc] Add IPC buffer compression to support matrix
* [ARROW-11421](https://issues.apache.org/jira/browse/ARROW-11421) - [Rust][DataFusion] Support group by Date32
* [ARROW-11422](https://issues.apache.org/jira/browse/ARROW-11422) - [C\#] Add support for decimals
* [ARROW-11423](https://issues.apache.org/jira/browse/ARROW-11423) - [R] value\_counts and some StructArray methods
* [ARROW-11425](https://issues.apache.org/jira/browse/ARROW-11425) - [C++][Compute] Improve quantile kernel for integers
* [ARROW-11426](https://issues.apache.org/jira/browse/ARROW-11426) - [Rust][DataFusion] EXTRACT support
* [ARROW-11428](https://issues.apache.org/jira/browse/ARROW-11428) - [Rust] Add power kernel
* [ARROW-11429](https://issues.apache.org/jira/browse/ARROW-11429) - Make string comparisson kernels generic over Utf8 and LargeUtf8
* [ARROW-11430](https://issues.apache.org/jira/browse/ARROW-11430) - [Rust] Kernel to combine two arrays based on boolean mask
* [ARROW-11431](https://issues.apache.org/jira/browse/ARROW-11431) - [Rust] [DataFusion] Add support for the SQL HAVING clause
* [ARROW-11435](https://issues.apache.org/jira/browse/ARROW-11435) - Allow creating ParquetPartition from external crate
* [ARROW-11436](https://issues.apache.org/jira/browse/ARROW-11436) - [Rust] Allow non-sized iterators in Primitive::from\_iter
* [ARROW-11437](https://issues.apache.org/jira/browse/ARROW-11437) - [Rust] Simplify benches
* [ARROW-11438](https://issues.apache.org/jira/browse/ARROW-11438) - Unsupported ast node Value(Boolean(true)) in sqltorel
* [ARROW-11439](https://issues.apache.org/jira/browse/ARROW-11439) - [Rust] Add year support to temporal kernel
* [ARROW-11440](https://issues.apache.org/jira/browse/ARROW-11440) - [Rust] [DataFusion] Add method to CsvExec to get CSV schema
* [ARROW-11442](https://issues.apache.org/jira/browse/ARROW-11442) - [Rust] Expose the logic used to interpret date/times
* [ARROW-11443](https://issues.apache.org/jira/browse/ARROW-11443) - [Rust] Write datetime information for Date64 Type in csv writer
* [ARROW-11444](https://issues.apache.org/jira/browse/ARROW-11444) - [Rust][DataFusion] Pass slices instead of &Vec to functions
* [ARROW-11446](https://issues.apache.org/jira/browse/ARROW-11446) - [DataFusion] Support scalars in builtin functions
* [ARROW-11447](https://issues.apache.org/jira/browse/ARROW-11447) - [Rust] Add shift kernel
* [ARROW-11449](https://issues.apache.org/jira/browse/ARROW-11449) - [CI][R][Windows] Use ccache
* [ARROW-11457](https://issues.apache.org/jira/browse/ARROW-11457) - [Rust] Make string comparisson kernels generic over Utf8 and LargeUtf8
* [ARROW-11459](https://issues.apache.org/jira/browse/ARROW-11459) - [Rust] Allow ListArray of primitives to be built from iterator
* [ARROW-11462](https://issues.apache.org/jira/browse/ARROW-11462) - [Developer] Remove needless quote from the default DOCKER\_VOLUME\_PREFIX
* [ARROW-11463](https://issues.apache.org/jira/browse/ARROW-11463) - [Python] Allow configuration of IpcWriterOptions 64Bit from PyArrow
* [ARROW-11466](https://issues.apache.org/jira/browse/ARROW-11466) - [Flight][Go] Add BasicAuth and BearerToken handlers for Go
* [ARROW-11467](https://issues.apache.org/jira/browse/ARROW-11467) - [R] Fix reference to json\_table\_reader() in R docs
* [ARROW-11468](https://issues.apache.org/jira/browse/ARROW-11468) - [R] Allow user to pass schema to read\_json\_arrow()
* [ARROW-11474](https://issues.apache.org/jira/browse/ARROW-11474) - [C++] Update bundled re2 version
* [ARROW-11476](https://issues.apache.org/jira/browse/ARROW-11476) - [Rust][DataFusion] Test running of TPCH benchmarks in CI
* [ARROW-11477](https://issues.apache.org/jira/browse/ARROW-11477) - [R][Doc] Reorganize and improve README and vignette content
* [ARROW-11478](https://issues.apache.org/jira/browse/ARROW-11478) - [R] Consider ways to make arrow.skip\_nul option more user-friendly
* [ARROW-11479](https://issues.apache.org/jira/browse/ARROW-11479) - [Rust][Parquet] Add method to return compressed size of row group
* [ARROW-11481](https://issues.apache.org/jira/browse/ARROW-11481) - [Rust] More cast implementations
* [ARROW-11484](https://issues.apache.org/jira/browse/ARROW-11484) - [Rust] Derive Clone for ExecutionContext
* [ARROW-11486](https://issues.apache.org/jira/browse/ARROW-11486) - [Website] Use Jekyll 4 and webpack to support Ruby 3.0 or later
* [ARROW-11489](https://issues.apache.org/jira/browse/ARROW-11489) - [Rust][DataFusion] Make DataFrame Send+Sync
* [ARROW-11491](https://issues.apache.org/jira/browse/ARROW-11491) - [Rust] Support json schema inference for nested list and struct
* [ARROW-11493](https://issues.apache.org/jira/browse/ARROW-11493) - [CI][Packaging][deb][RPM] Test built packages
* [ARROW-11500](https://issues.apache.org/jira/browse/ARROW-11500) - [R] Allow bundled build script to run on Solaris
* [ARROW-11501](https://issues.apache.org/jira/browse/ARROW-11501) - [C++] endianness check does not work on Solaris
* [ARROW-11504](https://issues.apache.org/jira/browse/ARROW-11504) - [Rust] verify Datatype in ListArray::from(ArrayDataRef)
* [ARROW-11505](https://issues.apache.org/jira/browse/ARROW-11505) - [Rust] Add support for LargeUtf8 in csv-writer
* [ARROW-11507](https://issues.apache.org/jira/browse/ARROW-11507) - [R] Bindings for GetRuntimeInfo
* [ARROW-11510](https://issues.apache.org/jira/browse/ARROW-11510) - [Python] Add note that pip \>= 19.0 is required to get binary packages
* [ARROW-11511](https://issues.apache.org/jira/browse/ARROW-11511) - [Rust] Replace Arc<ArrayData\> by ArrayData
* [ARROW-11512](https://issues.apache.org/jira/browse/ARROW-11512) - [Packaging][deb] Add missing gRPC dependency for Ubuntu 21.04
* [ARROW-11513](https://issues.apache.org/jira/browse/ARROW-11513) - [R] Bindings for sub/gsub
* [ARROW-11516](https://issues.apache.org/jira/browse/ARROW-11516) - [R] Allow all C++ compute functions to be called by name in dplyr
* [ARROW-11539](https://issues.apache.org/jira/browse/ARROW-11539) - [Developer][Archery] Change items\_per\_seconds units
* [ARROW-11541](https://issues.apache.org/jira/browse/ARROW-11541) - [C++][Compute] Implement approximate quantile kernel
* [ARROW-11542](https://issues.apache.org/jira/browse/ARROW-11542) - [Rust] json reader should not crash when reading nested list
* [ARROW-11544](https://issues.apache.org/jira/browse/ARROW-11544) - [Rust] [DataFusion] Implement as\_any for AggregateExpr
* [ARROW-11545](https://issues.apache.org/jira/browse/ARROW-11545) - [Rust] [DataFusion] SendableRecordBatchStream should implement Sync
* [ARROW-11556](https://issues.apache.org/jira/browse/ARROW-11556) - [C++] Minor benchmark improvements
* [ARROW-11557](https://issues.apache.org/jira/browse/ARROW-11557) - [Rust] Add table de-registration to DataFusion ExecutionContext
* [ARROW-11559](https://issues.apache.org/jira/browse/ARROW-11559) - [C++] Improve flatbuffers verification limits
* [ARROW-11559](https://issues.apache.org/jira/browse/ARROW-11559) - [C++] Improve flatbuffers verification limits
* [ARROW-11561](https://issues.apache.org/jira/browse/ARROW-11561) - [Rust][DataFusion] Add Send + Sync to MemTable::load
* [ARROW-11563](https://issues.apache.org/jira/browse/ARROW-11563) - [Rust] Support Cast(Utf8, TimeStamp(Nanoseconds, None))
* [ARROW-11568](https://issues.apache.org/jira/browse/ARROW-11568) - [C++][Compute] Mode kernel performance is bad in some conditions
* [ARROW-11570](https://issues.apache.org/jira/browse/ARROW-11570) - [Rust] ScalarValue - support Date64
* [ARROW-11571](https://issues.apache.org/jira/browse/ARROW-11571) - [CI] Cancel stale Github Actions workflow runs
* [ARROW-11572](https://issues.apache.org/jira/browse/ARROW-11572) - [Rust] Add a kernel for division by single scalar
* [ARROW-11573](https://issues.apache.org/jira/browse/ARROW-11573) - [Developer][Archery] Google benchmark now reports run type
* [ARROW-11574](https://issues.apache.org/jira/browse/ARROW-11574) - [Rust][DataFusion] Upgrade sqlparser to 0.8 to support parsing all TPC-H queries
* [ARROW-11575](https://issues.apache.org/jira/browse/ARROW-11575) - [Developer][Archery] Expose execution time in benchmark results
* [ARROW-11576](https://issues.apache.org/jira/browse/ARROW-11576) - [Rust] Remove unused variable in example
* [ARROW-11580](https://issues.apache.org/jira/browse/ARROW-11580) - [C++] Add CMake option ARROW\_DEPENDENCY\_SOURCE=VCPKG
* [ARROW-11581](https://issues.apache.org/jira/browse/ARROW-11581) - [Packaging][C++] Formalize distribution through vcpkg
* [ARROW-11589](https://issues.apache.org/jira/browse/ARROW-11589) - [R] Add methods for modifying Schemas
* [ARROW-11590](https://issues.apache.org/jira/browse/ARROW-11590) - [C++] Move CSV background generator to IO thread pool
* [ARROW-11591](https://issues.apache.org/jira/browse/ARROW-11591) - [C++][Compute] Prototype version of hash aggregation
* [ARROW-11592](https://issues.apache.org/jira/browse/ARROW-11592) - [Rust] Typo in comment
* [ARROW-11594](https://issues.apache.org/jira/browse/ARROW-11594) - [Rust] Support pretty printing with NullArrays
* [ARROW-11597](https://issues.apache.org/jira/browse/ARROW-11597) - [Rust] Split datatypes in a module
* [ARROW-11598](https://issues.apache.org/jira/browse/ARROW-11598) - [Rust] Split buffer.rs in smaller files
* [ARROW-11599](https://issues.apache.org/jira/browse/ARROW-11599) - [Rust] Add function to create array with all nulls
* [ARROW-11601](https://issues.apache.org/jira/browse/ARROW-11601) - [C++][Dataset] Expose pre-buffering in ParquetFileFormatReaderOptions
* [ARROW-11606](https://issues.apache.org/jira/browse/ARROW-11606) - [Rust] [DataFusion] Need guidance on HashAggregateExec reconstruction
* [ARROW-11610](https://issues.apache.org/jira/browse/ARROW-11610) - [C++] Download boost from sourceforge instead of bintray
* [ARROW-11611](https://issues.apache.org/jira/browse/ARROW-11611) - [C++] Update third party dependency mirrors
* [ARROW-11612](https://issues.apache.org/jira/browse/ARROW-11612) - [C++] Rebuild trimmed boost bundle for 1.75.0
* [ARROW-11613](https://issues.apache.org/jira/browse/ARROW-11613) - [R] Move nightly C++ builds off of bintray
* [ARROW-11616](https://issues.apache.org/jira/browse/ARROW-11616) - [Rust][DataFusion] Expose collect\_partitioned for DataFrame
* [ARROW-11621](https://issues.apache.org/jira/browse/ARROW-11621) - [CI][Gandiva][Linux] Fix Crossbow setup failure
* [ARROW-11626](https://issues.apache.org/jira/browse/ARROW-11626) - [Rust][DataFusion] Move DataFusion examples to own project to reduce nr dependencies
* [ARROW-11627](https://issues.apache.org/jira/browse/ARROW-11627) - [Rust] Typed allocator
* [ARROW-11637](https://issues.apache.org/jira/browse/ARROW-11637) - [CI][Conda] Update nightly clean target platforms and packages list
* [ARROW-11641](https://issues.apache.org/jira/browse/ARROW-11641) - [CI] Use docker buildkit's inline cache to reuse build cache across different hosts
* [ARROW-11649](https://issues.apache.org/jira/browse/ARROW-11649) - [R] Add support for null\_fallback to R
* [ARROW-11651](https://issues.apache.org/jira/browse/ARROW-11651) - [Rust][DataFusion] Implement Postgres Length Functions
* [ARROW-11653](https://issues.apache.org/jira/browse/ARROW-11653) - Ascii/unicode functions
* [ARROW-11655](https://issues.apache.org/jira/browse/ARROW-11655) - Pad/trim functions
* [ARROW-11656](https://issues.apache.org/jira/browse/ARROW-11656) - Left over functions/fixes
* [ARROW-11659](https://issues.apache.org/jira/browse/ARROW-11659) - [R] Preserve group\_by .drop argument
* [ARROW-11662](https://issues.apache.org/jira/browse/ARROW-11662) - [C++] Support sorting for decimal data type.
* [ARROW-11664](https://issues.apache.org/jira/browse/ARROW-11664) - [Rust] Cast to LargeUtf8
* [ARROW-11665](https://issues.apache.org/jira/browse/ARROW-11665) - [Python] Document precision and scale parameters of decimal128()
* [ARROW-11666](https://issues.apache.org/jira/browse/ARROW-11666) - [Integration] Add endianness "gold" integration file for decimal256
* [ARROW-11667](https://issues.apache.org/jira/browse/ARROW-11667) - [Rust] Add docs for utf8 comparison functions
* [ARROW-11669](https://issues.apache.org/jira/browse/ARROW-11669) - [Rust] [DataFusion] Remove concurrency field from GlobalLimitExec
* [ARROW-11671](https://issues.apache.org/jira/browse/ARROW-11671) - [Rust][DataFusion] Clean up docs on Expr
* [ARROW-11677](https://issues.apache.org/jira/browse/ARROW-11677) - [C++][Dataset] Write documentation
* [ARROW-11680](https://issues.apache.org/jira/browse/ARROW-11680) - [C++] Add vendored version of folly's spsc queue
* [ARROW-11683](https://issues.apache.org/jira/browse/ARROW-11683) - [R] Support dplyr::mutate()
* [ARROW-11685](https://issues.apache.org/jira/browse/ARROW-11685) - [C++] Typo in future\_test.cc
* [ARROW-11688](https://issues.apache.org/jira/browse/ARROW-11688) - [Rust] Casts between utf8 and large-utf8
* [ARROW-11690](https://issues.apache.org/jira/browse/ARROW-11690) - [Rust][DataFusion] Avoid Expr::clone in Expr builder methods
* [ARROW-11692](https://issues.apache.org/jira/browse/ARROW-11692) - [Rust][DataFusion] Improve documentation on Optimizer
* [ARROW-11693](https://issues.apache.org/jira/browse/ARROW-11693) - [C++] Add string length kernel
* [ARROW-11700](https://issues.apache.org/jira/browse/ARROW-11700) - [R] Internationalize error handling in tidy eval
* [ARROW-11701](https://issues.apache.org/jira/browse/ARROW-11701) - [R] Implement dplyr::relocate()
* [ARROW-11703](https://issues.apache.org/jira/browse/ARROW-11703) - [R] Implement dplyr::arrange()
* [ARROW-11704](https://issues.apache.org/jira/browse/ARROW-11704) - [R] Wire up dplyr::mutate() for datasets
* [ARROW-11707](https://issues.apache.org/jira/browse/ARROW-11707) - Support CSV schema inference without IO
* [ARROW-11708](https://issues.apache.org/jira/browse/ARROW-11708) - Clean up Rust 2021 linting warning
* [ARROW-11709](https://issues.apache.org/jira/browse/ARROW-11709) - [Rust][DataFusion] Move \`expressions\` and \`inputs\` into LogicalPlan rather than helpers in util
* [ARROW-11710](https://issues.apache.org/jira/browse/ARROW-11710) - [Rust][DataFusion] Implement ExprRewriter to avoid tree traversal redundancy
* [ARROW-11719](https://issues.apache.org/jira/browse/ARROW-11719) - Support merged schema for memory table
* [ARROW-11721](https://issues.apache.org/jira/browse/ARROW-11721) - json schema inference should return Schema type instead of SchemaRef
* [ARROW-11722](https://issues.apache.org/jira/browse/ARROW-11722) - Improve error message in FFI
* [ARROW-11724](https://issues.apache.org/jira/browse/ARROW-11724) - [C++] Namespace collisions with protobuf 3.15
* [ARROW-11725](https://issues.apache.org/jira/browse/ARROW-11725) - [Rust][DataFusion] Make use of the new divide\_scalar kernel in arrow
* [ARROW-11727](https://issues.apache.org/jira/browse/ARROW-11727) - [C++][FlightRPC] Use TDigest to estimate latency quantiles in benchmark
* [ARROW-11730](https://issues.apache.org/jira/browse/ARROW-11730) - [C++] Add implicit Future(Status) constructor for convenience
* [ARROW-11733](https://issues.apache.org/jira/browse/ARROW-11733) - [Rust][DataFusion] Support hash repartitioning
* [ARROW-11734](https://issues.apache.org/jira/browse/ARROW-11734) - [C++] vendored safe-math.h does not compile on Solaris
* [ARROW-11735](https://issues.apache.org/jira/browse/ARROW-11735) - [R] Allow Parquet and Arrow Dataset to be optional components
* [ARROW-11736](https://issues.apache.org/jira/browse/ARROW-11736) - [R] Allow string compute functions to be optional
* [ARROW-11737](https://issues.apache.org/jira/browse/ARROW-11737) - [C++] Patch vendored xxhash for Solaris
* [ARROW-11738](https://issues.apache.org/jira/browse/ARROW-11738) - [Rust][DataFusion] Concat Functions
* [ARROW-11740](https://issues.apache.org/jira/browse/ARROW-11740) - [C++] posix\_memalign not declared in scope on Solaris
* [ARROW-11742](https://issues.apache.org/jira/browse/ARROW-11742) - [Rust] [DataFusion] Add Expr::is\_null and Expr::is\_not\_null functions
* [ARROW-11744](https://issues.apache.org/jira/browse/ARROW-11744) - [C++] Add xsimd dependency
* [ARROW-11745](https://issues.apache.org/jira/browse/ARROW-11745) - [C++] Improve configurability of random data generation
* [ARROW-11750](https://issues.apache.org/jira/browse/ARROW-11750) - [Python][Dataset] Add support for project expressions
* [ARROW-11752](https://issues.apache.org/jira/browse/ARROW-11752) - [R] Replace usage of testthat::expect\_is()
* [ARROW-11753](https://issues.apache.org/jira/browse/ARROW-11753) - [Rust][DataFusion] Add test for Join Statement: Schema contains duplicate unqualified field name
* [ARROW-11754](https://issues.apache.org/jira/browse/ARROW-11754) - [R] Support dplyr::compute()
* [ARROW-11761](https://issues.apache.org/jira/browse/ARROW-11761) - [C++] Increase public API testing
* [ARROW-11766](https://issues.apache.org/jira/browse/ARROW-11766) - [R] Better handling for missing compression codecs on Linux
* [ARROW-11768](https://issues.apache.org/jira/browse/ARROW-11768) - [C++][CI] Make s390x build non-optional
* [ARROW-11773](https://issues.apache.org/jira/browse/ARROW-11773) - [Rust] Allow json writer to write out JSON arrays as well as newline formatted objects
* [ARROW-11774](https://issues.apache.org/jira/browse/ARROW-11774) - [R] one-line install from source on macOS
* [ARROW-11775](https://issues.apache.org/jira/browse/ARROW-11775) - [Rust][DataFusion] Feature Flags for Dependencies
* [ARROW-11777](https://issues.apache.org/jira/browse/ARROW-11777) - [Rust] impl AsRef for StringBuilder/BinaryBuilder
* [ARROW-11778](https://issues.apache.org/jira/browse/ARROW-11778) - Cast from large-utf8 to numerical arrays
* [ARROW-11779](https://issues.apache.org/jira/browse/ARROW-11779) - [Rust] make alloc module public
* [ARROW-11790](https://issues.apache.org/jira/browse/ARROW-11790) - [Rust][DataFusion] Change plan builder signature to take Vec<Expr\> rather than &[Expr]
* [ARROW-11794](https://issues.apache.org/jira/browse/ARROW-11794) - [Go] Add concurrent-safe ipc.FileReader.RecordAt(i)
* [ARROW-11795](https://issues.apache.org/jira/browse/ARROW-11795) - [MATLAB] Migrate MATLAB Interface for Apache Arrow design doc to Markdown
* [ARROW-11797](https://issues.apache.org/jira/browse/ARROW-11797) - [C++][Dataset] Provide Scanner methods to yield/visit scanned batches
* [ARROW-11798](https://issues.apache.org/jira/browse/ARROW-11798) - [Integration] Update testing submodule
* [ARROW-11799](https://issues.apache.org/jira/browse/ARROW-11799) - [Rust] String and Binary arrays created with incorrect length from unbound iterator
* [ARROW-11801](https://issues.apache.org/jira/browse/ARROW-11801) - [C++] Remove bad header guard in filesystem/type\_fwd.h
* [ARROW-11803](https://issues.apache.org/jira/browse/ARROW-11803) - [Rust] [Parquet] Support v2 LogicalType
* [ARROW-11806](https://issues.apache.org/jira/browse/ARROW-11806) - [Rust][DataFusion] Optimize inner join creation of indices
* [ARROW-11820](https://issues.apache.org/jira/browse/ARROW-11820) - Added macro create\_native to construct impl
* [ARROW-11822](https://issues.apache.org/jira/browse/ARROW-11822) - Support case sensitive for function
* [ARROW-11824](https://issues.apache.org/jira/browse/ARROW-11824) - [Rust] [Parquet] Use logical types in Arrow writer
* [ARROW-11825](https://issues.apache.org/jira/browse/ARROW-11825) - [Rust][DataFusion] Add mimalloc as option to benchmarks
* [ARROW-11833](https://issues.apache.org/jira/browse/ARROW-11833) - [C++] Vendored fast\_float errors for emscripten (architecture flag missing)
* [ARROW-11837](https://issues.apache.org/jira/browse/ARROW-11837) - [C++][Dataset] Expose originating fragment as a property of ScanTask
* [ARROW-11838](https://issues.apache.org/jira/browse/ARROW-11838) - [C++] Support reading IPC data with shared dictionaries
* [ARROW-11839](https://issues.apache.org/jira/browse/ARROW-11839) - [C++] Rewrite bit-unpacking optimizations using xsimd
* [ARROW-11842](https://issues.apache.org/jira/browse/ARROW-11842) - [Rust][Parquet] Use more efficient clone\_from in get\_batch\_with\_dict
* [ARROW-11852](https://issues.apache.org/jira/browse/ARROW-11852) - [Documentation] Update CONTRIBUTING to explain Contributor role
* [ARROW-11856](https://issues.apache.org/jira/browse/ARROW-11856) - [C++] Remove unused reference to RecordBatchStreamWriter
* [ARROW-11858](https://issues.apache.org/jira/browse/ARROW-11858) - [GLib] Gandiva Filter in GLib
* [ARROW-11859](https://issues.apache.org/jira/browse/ARROW-11859) - [GLib] GArrowArray: concatenate is missing
* [ARROW-11861](https://issues.apache.org/jira/browse/ARROW-11861) - [R][Packaging] Apply changes in r/tools/autobrew upstream
* [ARROW-11864](https://issues.apache.org/jira/browse/ARROW-11864) - [R] Document arrow.int64\_downcast option
* [ARROW-11870](https://issues.apache.org/jira/browse/ARROW-11870) - [Dev] Automatically run merge script in venv
* [ARROW-11876](https://issues.apache.org/jira/browse/ARROW-11876) - [Website] Update governance page
* [ARROW-11877](https://issues.apache.org/jira/browse/ARROW-11877) - [C++] Add initial microbenchmarks for Dataset internals
* [ARROW-11879](https://issues.apache.org/jira/browse/ARROW-11879) - [Rust][DataFusion] ExecutionContext::sql should optimize query plan
* [ARROW-11883](https://issues.apache.org/jira/browse/ARROW-11883) - [C++] Add ConcatMap, MergeMap, and an async-reentrant version of Map
* [ARROW-11887](https://issues.apache.org/jira/browse/ARROW-11887) - [C++] Add asynchronous read to streaming CSV reader
* [ARROW-11894](https://issues.apache.org/jira/browse/ARROW-11894) - [Rust][DataFusion] Change flight server example to use DataFrame API
* [ARROW-11895](https://issues.apache.org/jira/browse/ARROW-11895) - [Rust][DataFusion] Add support for extra column statistics
* [ARROW-11898](https://issues.apache.org/jira/browse/ARROW-11898) - [Rust] Pretty print columns
* [ARROW-11899](https://issues.apache.org/jira/browse/ARROW-11899) - [Java] Refactor the compression codec implementation into core/Arrow specific parts
* [ARROW-11900](https://issues.apache.org/jira/browse/ARROW-11900) - [Website] Add Yibo to committer list
* [ARROW-11906](https://issues.apache.org/jira/browse/ARROW-11906) - [R] Make FeatherReader print method more informative
* [ARROW-11907](https://issues.apache.org/jira/browse/ARROW-11907) - [C++] Use our own executor in S3FileSystem
* [ARROW-11910](https://issues.apache.org/jira/browse/ARROW-11910) - [Packaging][Ubuntu] Drop support for 16.04
* [ARROW-11911](https://issues.apache.org/jira/browse/ARROW-11911) - [Website] Add protobuf vs arrow to FAQ
* [ARROW-11912](https://issues.apache.org/jira/browse/ARROW-11912) - [R] Remove args from FeatherReader$create
* [ARROW-11913](https://issues.apache.org/jira/browse/ARROW-11913) - [Rust] Improve performance of StringBuilder
* [ARROW-11920](https://issues.apache.org/jira/browse/ARROW-11920) - [R] Add r/libarrow to make clean
* [ARROW-11921](https://issues.apache.org/jira/browse/ARROW-11921) - [R] Set LC\_COLLATE in r/data-raw/codegen.R
* [ARROW-11924](https://issues.apache.org/jira/browse/ARROW-11924) - [C++] Provide streaming output from GetFileInfo
* [ARROW-11925](https://issues.apache.org/jira/browse/ARROW-11925) - [R] Add \`between\` method for arrow\_dplyr\_query
* [ARROW-11927](https://issues.apache.org/jira/browse/ARROW-11927) - [Rust][DataFusion]  Support limit push down
* [ARROW-11931](https://issues.apache.org/jira/browse/ARROW-11931) - [Go][CI] Bump CI to use Go 1.15
* [ARROW-11935](https://issues.apache.org/jira/browse/ARROW-11935) - [C++] Add push generator
* [ARROW-11944](https://issues.apache.org/jira/browse/ARROW-11944) - [Developer] Achery benchmark diff regression: cannot compare jsons
* [ARROW-11949](https://issues.apache.org/jira/browse/ARROW-11949) - [Ruby] Accept raw Ruby objects as sort key and options
* [ARROW-11951](https://issues.apache.org/jira/browse/ARROW-11951) - [Rust] Remove OffsetSize::prefix
* [ARROW-11952](https://issues.apache.org/jira/browse/ARROW-11952) - [Rust] Make ArrayData --\> GenericListArray fallable instead of \`panic!\`
* [ARROW-11954](https://issues.apache.org/jira/browse/ARROW-11954) - [C++] arrow/util/io\_util.cc does not compile on Solaris
* [ARROW-11955](https://issues.apache.org/jira/browse/ARROW-11955) - [Rust][DataFusion] Support Union
* [ARROW-11958](https://issues.apache.org/jira/browse/ARROW-11958) - [GLib] GArrowChunkedArray: combine is missing
* [ARROW-11959](https://issues.apache.org/jira/browse/ARROW-11959) - [Rust][DataFusion] Fix logging of optimized plan
* [ARROW-11962](https://issues.apache.org/jira/browse/ARROW-11962) - [Rust][DataFusion] Update Datafusion Docs / readme
* [ARROW-11969](https://issues.apache.org/jira/browse/ARROW-11969) - [Rust][DataFusion] Improve Examples in documentation
* [ARROW-11972](https://issues.apache.org/jira/browse/ARROW-11972) - [C++][Dataset] Extract IpcFragmentScanOptions, ParquetFragmentScanOptions
* [ARROW-11973](https://issues.apache.org/jira/browse/ARROW-11973) - [Rust] Boolean AND/OR kernels should follow sql behaviour regarding null values
* [ARROW-11977](https://issues.apache.org/jira/browse/ARROW-11977) - [Rust] Add documentation examples for sort kernel
* [ARROW-11982](https://issues.apache.org/jira/browse/ARROW-11982) - [Rust] Donate Ballista Distributed Compute Platform
* [ARROW-11984](https://issues.apache.org/jira/browse/ARROW-11984) - [C++][Gandiva] Implement SHA1 and SHA256 functions
* [ARROW-11987](https://issues.apache.org/jira/browse/ARROW-11987) - [C++][Gandiva] Implement trigonometric functions on Gandiva
* [ARROW-11988](https://issues.apache.org/jira/browse/ARROW-11988) - [C++][Gandiva] Implements the last\_day function
* [ARROW-11992](https://issues.apache.org/jira/browse/ARROW-11992) - [Rust][Parquet] Add upgrade notes on 4.0 rename of LogicalType \#9731
* [ARROW-11993](https://issues.apache.org/jira/browse/ARROW-11993) - [C++] Don't download xsimd if ARROW\_SIMD\_LEVEL=NONE
* [ARROW-11996](https://issues.apache.org/jira/browse/ARROW-11996) - [R] Make r/configure run successfully on Solaris
* [ARROW-11999](https://issues.apache.org/jira/browse/ARROW-11999) - [Java] Support parallel vector element search with user-specified comparator
* [ARROW-12000](https://issues.apache.org/jira/browse/ARROW-12000) - [Documentation] Add note about deviation from style guide on struct/classes
* [ARROW-12005](https://issues.apache.org/jira/browse/ARROW-12005) - [R] Fix a bash typo in configure
* [ARROW-12017](https://issues.apache.org/jira/browse/ARROW-12017) - [R] [Documentation] Make proper developing arrow docs
* [ARROW-12019](https://issues.apache.org/jira/browse/ARROW-12019) - [Rust] [Parquet] Update README for 2.6.0 support
* [ARROW-12020](https://issues.apache.org/jira/browse/ARROW-12020) - [Rust][DataFusion] Adding SHOW TABLES and SHOW COLUMNS + partial information\_schema support to DataFusion
* [ARROW-12031](https://issues.apache.org/jira/browse/ARROW-12031) - [C++][CSV] infer CSV timestamps columns with fractional seconds
* [ARROW-12032](https://issues.apache.org/jira/browse/ARROW-12032) - [Rust] Optimize comparison kernels using trusted\_len iterator for bools
* [ARROW-12034](https://issues.apache.org/jira/browse/ARROW-12034) - [Docs] Formalize Minor PRs
* [ARROW-12037](https://issues.apache.org/jira/browse/ARROW-12037) - [Rust] [DataFusion] Support catalogs and schemas for table namespacing
* [ARROW-12038](https://issues.apache.org/jira/browse/ARROW-12038) - [Rust][DataFusion] Upgrade hashbrown to 0.11
* [ARROW-12039](https://issues.apache.org/jira/browse/ARROW-12039) - [CI][C++][Gandiva] Fix gandiva nightly linux build failure
* [ARROW-12040](https://issues.apache.org/jira/browse/ARROW-12040) - [R] [CI] [C++] test-r-rstudio-r-base-3.6-opensuse15 timing out during tests
* [ARROW-12043](https://issues.apache.org/jira/browse/ARROW-12043) - [Rust] [Parquet] Write fixed size binary arrays
* [ARROW-12045](https://issues.apache.org/jira/browse/ARROW-12045) - First Chunk of ported Parquet Code
* [ARROW-12047](https://issues.apache.org/jira/browse/ARROW-12047) - [Rust] Clippy parquet
* [ARROW-12048](https://issues.apache.org/jira/browse/ARROW-12048) - [Rust][DataFusion] Support Common Table Expressions
* [ARROW-12052](https://issues.apache.org/jira/browse/ARROW-12052) - [Rust] Implement child data in C FFI
* [ARROW-12056](https://issues.apache.org/jira/browse/ARROW-12056) - [C++] Create sequencing AsyncGenerator
* [ARROW-12058](https://issues.apache.org/jira/browse/ARROW-12058) - [Python] Enable arithmetic operations on Expressions
* [ARROW-12068](https://issues.apache.org/jira/browse/ARROW-12068) - [Python] Stop using distutils
* [ARROW-12069](https://issues.apache.org/jira/browse/ARROW-12069) - [C++][Gandiva]Implement IN expressions for Decimal types
* [ARROW-12070](https://issues.apache.org/jira/browse/ARROW-12070) - [GLib] Drop support for GNU Autotools
* [ARROW-12071](https://issues.apache.org/jira/browse/ARROW-12071) - [GLib] Keep input stream reference of GArrowJSONReader
* [ARROW-12075](https://issues.apache.org/jira/browse/ARROW-12075) - [Rust][DataFusion] Add CTE to list of supported features
* [ARROW-12081](https://issues.apache.org/jira/browse/ARROW-12081) - [R] Bindings for utf8\_length
* [ARROW-12082](https://issues.apache.org/jira/browse/ARROW-12082) - [R][Dataset] Allow create dataset from vector of file paths
* [ARROW-12094](https://issues.apache.org/jira/browse/ARROW-12094) - [C++][R] Fix/workaround re2 building on clang/libc++
* [ARROW-12097](https://issues.apache.org/jira/browse/ARROW-12097) - [C++] Modify BackgroundGenerator so it creates fewer threads
* [ARROW-12098](https://issues.apache.org/jira/browse/ARROW-12098) - [R] Catch cpp build failures on linux
* [ARROW-12104](https://issues.apache.org/jira/browse/ARROW-12104) - Next Chunk of ported Code
* [ARROW-12106](https://issues.apache.org/jira/browse/ARROW-12106) - [Rust][DataFusion] Support \`SELECT \* from information\_schema.tables\`
* [ARROW-12107](https://issues.apache.org/jira/browse/ARROW-12107) - [Rust][DataFusion] Support \`SELECT \* from information\_schema.columns\`
* [ARROW-12108](https://issues.apache.org/jira/browse/ARROW-12108) - [Rust][DataFusion] Support \`SHOW TABLES\`
* [ARROW-12109](https://issues.apache.org/jira/browse/ARROW-12109) - [Rust][DataFusion] Support \`SHOW COLUMNS\`
* [ARROW-12110](https://issues.apache.org/jira/browse/ARROW-12110) - [Java] Implement ZSTD buffer compression for java
* [ARROW-12111](https://issues.apache.org/jira/browse/ARROW-12111) - [Java] place files generated by flatc under source control
* [ARROW-12116](https://issues.apache.org/jira/browse/ARROW-12116) - [Rust] Fix or ignore 1.51 clippy lints
* [ARROW-12119](https://issues.apache.org/jira/browse/ARROW-12119) - [Rust][DataFusion] Improve performance of to\_array\_of\_size
* [ARROW-12120](https://issues.apache.org/jira/browse/ARROW-12120) - [Rust] Generate random arrays and batches
* [ARROW-12121](https://issues.apache.org/jira/browse/ARROW-12121) - [Rust] [Parquet] Arrow writer benchmarks
* [ARROW-12123](https://issues.apache.org/jira/browse/ARROW-12123) - [Rust][DataFusion] Use smallvec for indices for better join performance
* [ARROW-12128](https://issues.apache.org/jira/browse/ARROW-12128) - [CI][Crossbow] Remove (or fix) test-ubuntu-16.04-cpp job
* [ARROW-12131](https://issues.apache.org/jira/browse/ARROW-12131) - [CI][GLib] Ensure upgrading MSYS2
* [ARROW-12133](https://issues.apache.org/jira/browse/ARROW-12133) - [C++][Gandiva] Add option to disable setting mcpu flag to host cpu during llvm ir compilation
* [ARROW-12134](https://issues.apache.org/jira/browse/ARROW-12134) - [C++] Add regex string match kernel
* [ARROW-12136](https://issues.apache.org/jira/browse/ARROW-12136) - [Rust][DataFusion] Reduce default batch\_size to 8192
* [ARROW-12139](https://issues.apache.org/jira/browse/ARROW-12139) - [Python][Packaging] Use vcpkg to build macOS wheels
* [ARROW-12141](https://issues.apache.org/jira/browse/ARROW-12141) - [R] Bindings for grepl
* [ARROW-12143](https://issues.apache.org/jira/browse/ARROW-12143) - [CI] R builds should timeout and fail after some threshold and dump the output.
* [ARROW-12146](https://issues.apache.org/jira/browse/ARROW-12146) - [C++][Gandiva] Implement CONVERT\_FROM(expression, ‘UTF8’, replacement char) function
* [ARROW-12151](https://issues.apache.org/jira/browse/ARROW-12151) - [Docs] Add Jira component + summary conventions to the docs
* [ARROW-12153](https://issues.apache.org/jira/browse/ARROW-12153) - [Rust] [Parquet] Return file metadata after writing Parquet file
* [ARROW-12160](https://issues.apache.org/jira/browse/ARROW-12160) - [Rust] Add an \`into\_inner()\` method to ipc::writer::StreamWriter
* [ARROW-12164](https://issues.apache.org/jira/browse/ARROW-12164) - [Java] Make BaseAllocator.Config public
* [ARROW-12165](https://issues.apache.org/jira/browse/ARROW-12165) - [Rust] Inline append functions in builders for performance
* [ARROW-12168](https://issues.apache.org/jira/browse/ARROW-12168) - [Go][IPC] Implement Compression handling for IPC
* [ARROW-12170](https://issues.apache.org/jira/browse/ARROW-12170) - [Rust][DataFusion] Introduce repartition optimization
* [ARROW-12173](https://issues.apache.org/jira/browse/ARROW-12173) - [GLib] Remove \#include <config.h\>
* [ARROW-12176](https://issues.apache.org/jira/browse/ARROW-12176) - parquet/low-level-api/reader-writer.cc has some typos.
* [ARROW-12187](https://issues.apache.org/jira/browse/ARROW-12187) - [C++][FlightRPC] Enable compression in Flight benchmark
* [ARROW-12188](https://issues.apache.org/jira/browse/ARROW-12188) - [Docs] Switch to pydata-sphinx-theme for the main sphinx docs
* [ARROW-12190](https://issues.apache.org/jira/browse/ARROW-12190) - [Rust][DataFusion] Implement partitioned hash join
* [ARROW-12192](https://issues.apache.org/jira/browse/ARROW-12192) - [Website] Use downloadable URL for archive download
* [ARROW-12193](https://issues.apache.org/jira/browse/ARROW-12193) - [Dev][Release] Use downloadable URL for archive download
* [ARROW-12194](https://issues.apache.org/jira/browse/ARROW-12194) - [Rust] [Parquet] Update zstd version
* [ARROW-12197](https://issues.apache.org/jira/browse/ARROW-12197) - [R] dplyr bindings for cast, dictionary\_encode
* [ARROW-12200](https://issues.apache.org/jira/browse/ARROW-12200) - [R] Export and document list\_compute\_functions
* [ARROW-12204](https://issues.apache.org/jira/browse/ARROW-12204) - [Rust][CI] Reduce size of rust build artifacts in integration test
* [ARROW-12206](https://issues.apache.org/jira/browse/ARROW-12206) - [Python] Fix Table docstrings
* [ARROW-12208](https://issues.apache.org/jira/browse/ARROW-12208) - [C++] Add the ability to run async tasks without using the CPU thread pool
* [ARROW-12210](https://issues.apache.org/jira/browse/ARROW-12210) - [Rust][DataFusion] Document SHOW TABLES / SHOW COLUMNS / InformationSchema
* [ARROW-12214](https://issues.apache.org/jira/browse/ARROW-12214) - [Rust][DataFusion] Add some tests for limit
* [ARROW-12215](https://issues.apache.org/jira/browse/ARROW-12215) - [C++] fixed size binary columns cannot be null in CSV reader
* [ARROW-12217](https://issues.apache.org/jira/browse/ARROW-12217) - [C++] Cleanup cpp examples source file names
* [ARROW-12222](https://issues.apache.org/jira/browse/ARROW-12222) - [Dev][Packaging] Include build url in the crossbow console report
* [ARROW-12224](https://issues.apache.org/jira/browse/ARROW-12224) -  [Rust] Use stable rust for no default test, clean up CI tests
* [ARROW-12228](https://issues.apache.org/jira/browse/ARROW-12228) - [CI] Create base image for conda environments
* [ARROW-12236](https://issues.apache.org/jira/browse/ARROW-12236) - [R][CI] Add check that all docs pages are listed in \_pkgdown.yml
* [ARROW-12237](https://issues.apache.org/jira/browse/ARROW-12237) - [Packaging][Debian] Add support for bulleye
* [ARROW-12238](https://issues.apache.org/jira/browse/ARROW-12238) - [JS] Remove trailing spaces
* [ARROW-12239](https://issues.apache.org/jira/browse/ARROW-12239) - [JS] Switch to yarn
* [ARROW-12242](https://issues.apache.org/jira/browse/ARROW-12242) - [Python][Doc] Tweak nightly build instructions
* [ARROW-12246](https://issues.apache.org/jira/browse/ARROW-12246) - [CI] Sync conda recipes with upstream feedstock
* [ARROW-12248](https://issues.apache.org/jira/browse/ARROW-12248) - [C++] Allow static builds to change memory allocators
* [ARROW-12249](https://issues.apache.org/jira/browse/ARROW-12249) - [R] [CI] Fix test-r-install-local nightlies
* [ARROW-12251](https://issues.apache.org/jira/browse/ARROW-12251) - [Rust] [Ballista] Add Ballista tests to CI
* [ARROW-12263](https://issues.apache.org/jira/browse/ARROW-12263) - [Dev][Packaging] Move Crossbow to Archery
* [ARROW-12269](https://issues.apache.org/jira/browse/ARROW-12269) - [JS] Move to eslint
* [ARROW-12274](https://issues.apache.org/jira/browse/ARROW-12274) - [JS] Document how to run tests without building
* [ARROW-12277](https://issues.apache.org/jira/browse/ARROW-12277) - [Rust][DataFusion] Min/Max are not supported for timestamp types
* [ARROW-12278](https://issues.apache.org/jira/browse/ARROW-12278) - [Rust][DataFusion]Use Timestamp(Nanosecond, None) for SQL TIMESTAMP Type
* [ARROW-12280](https://issues.apache.org/jira/browse/ARROW-12280) - [Developer] Remove @-mentions from commit messages in merge tool
* [ARROW-12281](https://issues.apache.org/jira/browse/ARROW-12281) - [JS] Remove shx, trash, and rimraf
* [ARROW-12283](https://issues.apache.org/jira/browse/ARROW-12283) - [R] Bindings for basic type convert functions in dplyr verbs
* [ARROW-12286](https://issues.apache.org/jira/browse/ARROW-12286) - [C++] Create AsyncGenerator from Future<AsyncGenerator<T\>\>
* [ARROW-12287](https://issues.apache.org/jira/browse/ARROW-12287) - [C++] Create enumerating generator
* [ARROW-12288](https://issues.apache.org/jira/browse/ARROW-12288) - [C++] Create Scanner interface
* [ARROW-12289](https://issues.apache.org/jira/browse/ARROW-12289) - [C++] Create basic AsyncScanner implementation
* [ARROW-12303](https://issues.apache.org/jira/browse/ARROW-12303) - [JS] Use iterators instead of generators in critical code paths
* [ARROW-12304](https://issues.apache.org/jira/browse/ARROW-12304) - [R] Update news and polish docs for 4.0
* [ARROW-12305](https://issues.apache.org/jira/browse/ARROW-12305) - [JS] Benchmark test data generate.py assumes python 2
* [ARROW-12309](https://issues.apache.org/jira/browse/ARROW-12309) - [JS] Make es2015 bundles the default
* [ARROW-12316](https://issues.apache.org/jira/browse/ARROW-12316) - [C++] Switch default memory allocator from jemalloc to mimalloc on macOS
* [ARROW-12317](https://issues.apache.org/jira/browse/ARROW-12317) - [Rust] JSON writer does not support time, date or interval types
* [ARROW-12320](https://issues.apache.org/jira/browse/ARROW-12320) - [CI] REPO arg missing from conda-cpp-valgrind
* [ARROW-12323](https://issues.apache.org/jira/browse/ARROW-12323) - [C++][Gandiva] Implement castTIME(timestamp) function
* [ARROW-12325](https://issues.apache.org/jira/browse/ARROW-12325) - [C++] [CI] Nightly gandiva build failing due to failure of compiler to move return value
* [ARROW-12326](https://issues.apache.org/jira/browse/ARROW-12326) - [C++] Avoid needless c-ares detection
* [ARROW-12328](https://issues.apache.org/jira/browse/ARROW-12328) - [Rust] [Ballista] Fix code formatting
* [ARROW-12329](https://issues.apache.org/jira/browse/ARROW-12329) - [Rust] [Ballista] Add README
* [ARROW-12332](https://issues.apache.org/jira/browse/ARROW-12332) - [Rust] [Ballista] Api server for scheduler
* [ARROW-12333](https://issues.apache.org/jira/browse/ARROW-12333) - [JS] Remove jest-environment-node-debug and do not emit from typescript by default
* [ARROW-12335](https://issues.apache.org/jira/browse/ARROW-12335) - [Rust] [Ballista] Bump DataFusion version
* [ARROW-12337](https://issues.apache.org/jira/browse/ARROW-12337) - add DoubleEndedIterator and ExactSizeIterator traits
* [ARROW-12351](https://issues.apache.org/jira/browse/ARROW-12351) - [CI][Ruby] Use ruby/setup-ruby instead of actions/setup-ruby
* [ARROW-12352](https://issues.apache.org/jira/browse/ARROW-12352) - [CI][R][Windows] Remove needless workaround for MSYS2
* [ARROW-12353](https://issues.apache.org/jira/browse/ARROW-12353) - [Packaging][deb] Rename -archive-keyring to -apt-source
* [ARROW-12354](https://issues.apache.org/jira/browse/ARROW-12354) - [Packaging][RPM] Use apache.jfrog.io/artifactory/ instead of apache.bintray.com/
* [ARROW-12356](https://issues.apache.org/jira/browse/ARROW-12356) - [Website] Update install page instructions to point to artifactory
* [ARROW-12361](https://issues.apache.org/jira/browse/ARROW-12361) - [Rust] [DataFusion] Allow users to override physical optimization rules
* [ARROW-12367](https://issues.apache.org/jira/browse/ARROW-12367) - [C++] Stop producing when PushGenerator was destroyed
* [ARROW-12370](https://issues.apache.org/jira/browse/ARROW-12370) - [R] Bindings for power kernel
* [ARROW-12374](https://issues.apache.org/jira/browse/ARROW-12374) - [CI][C++][cron] Use Ubuntu 20.04 instead of 16.04
* [ARROW-12375](https://issues.apache.org/jira/browse/ARROW-12375) - [Release] Remove rebase post-release scripts
* [ARROW-12376](https://issues.apache.org/jira/browse/ARROW-12376) - [Dev] archery trigger-bot should use logger.exception
* [ARROW-12380](https://issues.apache.org/jira/browse/ARROW-12380) - [Rust][Ballista] Add scheduler ui
* [ARROW-12381](https://issues.apache.org/jira/browse/ARROW-12381) - [Packaging][Python] macOS wheels are built with wrong package kind
* [ARROW-12383](https://issues.apache.org/jira/browse/ARROW-12383) - [JS] Update direct deps
* [ARROW-12384](https://issues.apache.org/jira/browse/ARROW-12384) - [JS] Improve code style
* [ARROW-12389](https://issues.apache.org/jira/browse/ARROW-12389) - [R] [Docs] Add note about autocasting
* [ARROW-12395](https://issues.apache.org/jira/browse/ARROW-12395) - [C++]: Create RunInSerialExecutor benchmark
* [ARROW-12396](https://issues.apache.org/jira/browse/ARROW-12396) - [Python][Docs] Clarify serialization docstrings about deprecated status
* [ARROW-12397](https://issues.apache.org/jira/browse/ARROW-12397) - [Rust] [DataFusion] Simplify readme example \#10038
* [ARROW-12398](https://issues.apache.org/jira/browse/ARROW-12398) - [Rust] Remove double bound checks in iterators
* [ARROW-12400](https://issues.apache.org/jira/browse/ARROW-12400) - [Rust] Re-enable transform module tests
* [ARROW-12402](https://issues.apache.org/jira/browse/ARROW-12402) - [Rust] [DataFusion] Implement SQL metrics framework
* [ARROW-12406](https://issues.apache.org/jira/browse/ARROW-12406) - [R] fix checkbashims violation in configure
* [ARROW-12409](https://issues.apache.org/jira/browse/ARROW-12409) - [R] Remove LazyData from DESCRIPTION
* [ARROW-12419](https://issues.apache.org/jira/browse/ARROW-12419) - [Java] flatc is not used in mvn
* [ARROW-12420](https://issues.apache.org/jira/browse/ARROW-12420) - [C++/Dataset] Reading null columns as dictionary not longer possible
* [ARROW-12423](https://issues.apache.org/jira/browse/ARROW-12423) - [Docs] Codecov badge in main Readme only applies to Rust
* [ARROW-12425](https://issues.apache.org/jira/browse/ARROW-12425) - [Rust] new\_null\_array doesn't allocate keys buffer for dictionary arrays
* [ARROW-12432](https://issues.apache.org/jira/browse/ARROW-12432) - [Rust] [DataFusion] Add metrics for SortExec
* [ARROW-12436](https://issues.apache.org/jira/browse/ARROW-12436) - [Rust][Ballista] Add watch capabilities to config backend trait
* [ARROW-12467](https://issues.apache.org/jira/browse/ARROW-12467) - [C++][Gandiva] Add support for LLVM12
* [ARROW-12477](https://issues.apache.org/jira/browse/ARROW-12477) - [Release] Download linux aarch64 miniforge in verify-release-candidate.sh
* [ARROW-12485](https://issues.apache.org/jira/browse/ARROW-12485) - [C++] Use mimalloc as the default memory allocator on macOS
* [ARROW-12488](https://issues.apache.org/jira/browse/ARROW-12488) - [GLib] Use g\_memdup2() with GLib 2.68 or later
* [ARROW-12494](https://issues.apache.org/jira/browse/ARROW-12494) - [C++] ORC adapter fails to compile on GCC 4.8
* [ARROW-12506](https://issues.apache.org/jira/browse/ARROW-12506) - [Python] Improve modularity of pyarrow codebase to speedup compile time
* [ARROW-12652](https://issues.apache.org/jira/browse/ARROW-12652) - disable conda arm64 in nightly
* [PARQUET-1846](https://issues.apache.org/jira/browse/PARQUET-1846) - [C++] Remove deprecated IO classes and related functions
* [PARQUET-1899](https://issues.apache.org/jira/browse/PARQUET-1899) - [C++] Deprecated ReadBatchSpaced in parquet/column\_reader
* [PARQUET-1990](https://issues.apache.org/jira/browse/PARQUET-1990) - [C++] ConvertedType::NA is  written out in some cases
* [PARQUET-1993](https://issues.apache.org/jira/browse/PARQUET-1993) - [C++] Expose when prefetching completes



# Apache Arrow 3.0.0 (2021-01-25)

## New Features and Improvements

* [ARROW-1846](https://issues.apache.org/jira/browse/ARROW-1846) - [C++] Implement "any" reduction kernel for boolean data
* [ARROW-4193](https://issues.apache.org/jira/browse/ARROW-4193) - [Rust] Add support for decimal data type
* [ARROW-4544](https://issues.apache.org/jira/browse/ARROW-4544) - [Rust] Read nested JSON structs into StructArrays
* [ARROW-4804](https://issues.apache.org/jira/browse/ARROW-4804) - [Rust] Read temporal values from CSV - Parse Date32 and Date64 in CSV reader
* [ARROW-4960](https://issues.apache.org/jira/browse/ARROW-4960) - [R] Add crossbow task for r-arrow-feedstock
* [ARROW-4970](https://issues.apache.org/jira/browse/ARROW-4970) - [C++][Parquet] Implement parquet::FileMetaData::Equals
* [ARROW-5336](https://issues.apache.org/jira/browse/ARROW-5336) - [C++] Implement arrow::Concatenate for dictionary-encoded arrays with unequal dictionaries
* [ARROW-5350](https://issues.apache.org/jira/browse/ARROW-5350) - [Rust] Support filtering on primitive/string lists
* [ARROW-5394](https://issues.apache.org/jira/browse/ARROW-5394) - [C++] Benchmarks for IsIn Kernel
* [ARROW-5679](https://issues.apache.org/jira/browse/ARROW-5679) - [Python] Drop Python 3.5 from support matrix
* [ARROW-5950](https://issues.apache.org/jira/browse/ARROW-5950) - [Rust] [DataFusion] Add ability to log via logger dependency
* [ARROW-6071](https://issues.apache.org/jira/browse/ARROW-6071) - [C++] Implement casting Binary <-\> LargeBinary
* [ARROW-6697](https://issues.apache.org/jira/browse/ARROW-6697) - [Rust] [DataFusion] Validate that all parquet partitions have the same schema
* [ARROW-6715](https://issues.apache.org/jira/browse/ARROW-6715) - [Website] Describe "non-free" component is needed for Plasma packages in install page
* [ARROW-6883](https://issues.apache.org/jira/browse/ARROW-6883) - [C++] Support sending delta DictionaryBatch or replacement DictionaryBatch in IPC stream writer class
* [ARROW-6995](https://issues.apache.org/jira/browse/ARROW-6995) - [Packaging][Crossbow] The windows conda artifacts are not uploaded to GitHub releases
* [ARROW-7531](https://issues.apache.org/jira/browse/ARROW-7531) - [C++] Investigate header cost reduction
* [ARROW-7800](https://issues.apache.org/jira/browse/ARROW-7800) - [Python] Expose GetRecordBatchReader API in PyArrow
* [ARROW-7842](https://issues.apache.org/jira/browse/ARROW-7842) - [Rust] [Parquet] Implement array reader for list type
* [ARROW-8113](https://issues.apache.org/jira/browse/ARROW-8113) - [C++] Implement a lighter-weight variant
* [ARROW-8199](https://issues.apache.org/jira/browse/ARROW-8199) - [C++] Add support for multi-column sort on Table
* [ARROW-8289](https://issues.apache.org/jira/browse/ARROW-8289) - [Rust] [Parquet] Implement minimal Arrow Parquet writer as starting point for full writer
* [ARROW-8423](https://issues.apache.org/jira/browse/ARROW-8423) - [Rust] [Parquet] Serialize arrow schema into metadata when writing parquet
* [ARROW-8425](https://issues.apache.org/jira/browse/ARROW-8425) - [Rust] [Parquet] Add support for writing temporal types
* [ARROW-8426](https://issues.apache.org/jira/browse/ARROW-8426) - [Rust] [Parquet] Add support for writing dictionary types
* [ARROW-8426](https://issues.apache.org/jira/browse/ARROW-8426) - [Rust] [Parquet] Add support for writing dictionary types
* [ARROW-8853](https://issues.apache.org/jira/browse/ARROW-8853) - [Rust] [Integration Testing] Enable Flight tests
* [ARROW-8876](https://issues.apache.org/jira/browse/ARROW-8876) - [C++] Implement casts from date types to Timestamp
* [ARROW-8883](https://issues.apache.org/jira/browse/ARROW-8883) - [Rust] [Integration Testing] Enable passing tests and update spec doc
* [ARROW-9001](https://issues.apache.org/jira/browse/ARROW-9001) - [R] Box outputs as correct type in call\_function
* [ARROW-9164](https://issues.apache.org/jira/browse/ARROW-9164) - [C++] Provide APIs for adding "docstrings" to arrow::compute::Function classes that can be accessed by bindings
* [ARROW-9187](https://issues.apache.org/jira/browse/ARROW-9187) - [R] Add bindings for arithmetic kernels
* [ARROW-9296](https://issues.apache.org/jira/browse/ARROW-9296) - [CI][Rust] Enable more clippy lint checks
* [ARROW-9304](https://issues.apache.org/jira/browse/ARROW-9304) - [C++] Add "AppendEmptyValue" builder APIs for use inside StructBuilder::AppendNull
* [ARROW-9361](https://issues.apache.org/jira/browse/ARROW-9361) - [Rust] Move other array types into their own modules
* [ARROW-9367](https://issues.apache.org/jira/browse/ARROW-9367) - [Python] Sorting on pyarrow data structures ?
* [ARROW-9400](https://issues.apache.org/jira/browse/ARROW-9400) - [Python] Do not depend on conda-forge static libraries in Windows wheel builds
* [ARROW-9475](https://issues.apache.org/jira/browse/ARROW-9475) - [Java] Clean up usages of BaseAllocator, use BufferAllocator instead
* [ARROW-9489](https://issues.apache.org/jira/browse/ARROW-9489) - [C++] Add fill\_null kernel implementation for (array[string], scalar[string])
* [ARROW-9555](https://issues.apache.org/jira/browse/ARROW-9555) - [Rust] [DataFusion] Add inner (hash) equijoin physical plan
* [ARROW-9564](https://issues.apache.org/jira/browse/ARROW-9564) - [Packaging] Vendor r-arrow-feedstock conda-forge recipe
* [ARROW-9674](https://issues.apache.org/jira/browse/ARROW-9674) - [Rust] Parquet reader should implement Send + Sync
* [ARROW-9704](https://issues.apache.org/jira/browse/ARROW-9704) - [Java] TestEndianness.testLittleEndian fails on big endian platform
* [ARROW-9707](https://issues.apache.org/jira/browse/ARROW-9707) - [Rust] [DataFusion] Re-implement threading model
* [ARROW-9709](https://issues.apache.org/jira/browse/ARROW-9709) - [Java] Test cases in arrow-vector assume little-endian platform
* [ARROW-9728](https://issues.apache.org/jira/browse/ARROW-9728) - [Rust] [Parquet] Compute nested definition and repetition for structs
* [ARROW-9747](https://issues.apache.org/jira/browse/ARROW-9747) - [C++][Java][Format] Support Decimal256 Type
* [ARROW-9771](https://issues.apache.org/jira/browse/ARROW-9771) - [Rust] [DataFusion] Predicate Pushdown Improvement: treat predicates separated by AND separately
* [ARROW-9803](https://issues.apache.org/jira/browse/ARROW-9803) - [Go] Add initial support for s390x
* [ARROW-9804](https://issues.apache.org/jira/browse/ARROW-9804) - [FlightRPC] Authentication Redesign
* [ARROW-9828](https://issues.apache.org/jira/browse/ARROW-9828) - [Rust] [DataFusion] TableProvider trait should support predicate push-down
* [ARROW-9861](https://issues.apache.org/jira/browse/ARROW-9861) - [Java] Failed Arrow Vector on big-endian platform
* [ARROW-9862](https://issues.apache.org/jira/browse/ARROW-9862) - Throw an exception in UnsafeDirectLittleEndian on Big-Endian platform
* [ARROW-9911](https://issues.apache.org/jira/browse/ARROW-9911) - [Rust][DataFusion] SELECT <expression\> with no FROM clause should produce a single row of output
* [ARROW-9945](https://issues.apache.org/jira/browse/ARROW-9945) - [C++][Dataset] Refactor Expression::Assume to return a Result
* [ARROW-9991](https://issues.apache.org/jira/browse/ARROW-9991) - [C++] split kernels for strings/binary
* [ARROW-10002](https://issues.apache.org/jira/browse/ARROW-10002) - [Rust] Trait-specialization requires nightly
* [ARROW-10021](https://issues.apache.org/jira/browse/ARROW-10021) - [C++][Compute] Support finding nth frequently used value in mode kernel
* [ARROW-10032](https://issues.apache.org/jira/browse/ARROW-10032) - [Documentation] C++ Windows docs are out of date
* [ARROW-10079](https://issues.apache.org/jira/browse/ARROW-10079) - [Rust]: Benchmark and improve count\_set\_bits function
* [ARROW-10095](https://issues.apache.org/jira/browse/ARROW-10095) - [Rust] [Parquet] Update for IPC changes
* [ARROW-10097](https://issues.apache.org/jira/browse/ARROW-10097) - [C++] Persist SetLookupState in between usages of IsIn when filtering dataset batches
* [ARROW-10106](https://issues.apache.org/jira/browse/ARROW-10106) - [FlightRPC][Java] Expose onIsReady() callback on OutboundStreamListener
* [ARROW-10108](https://issues.apache.org/jira/browse/ARROW-10108) - [Rust] [Parquet] Fix compiler warning about unused return value
* [ARROW-10109](https://issues.apache.org/jira/browse/ARROW-10109) - [Rust] Add support to produce a C Data interface
* [ARROW-10110](https://issues.apache.org/jira/browse/ARROW-10110) - [Rust] Add support to consume C Data Interface
* [ARROW-10131](https://issues.apache.org/jira/browse/ARROW-10131) - [C++][Dataset] Lazily parse parquet metadata / statistics in ParquetDatasetFactory and ParquetFileFragment
* [ARROW-10135](https://issues.apache.org/jira/browse/ARROW-10135) - [Rust] [Parquet] Refactor file module to help adding sources
* [ARROW-10143](https://issues.apache.org/jira/browse/ARROW-10143) - [C++] ArrayRangeEquals should accept EqualOptions
* [ARROW-10144](https://issues.apache.org/jira/browse/ARROW-10144) - [Flight] Add support for using the TLS\_SNI extension
* [ARROW-10149](https://issues.apache.org/jira/browse/ARROW-10149) - [Rust] Add support to external release of un-owned buffers
* [ARROW-10163](https://issues.apache.org/jira/browse/ARROW-10163) - [Rust] [DataFusion] Add DictionaryArray coercion support
* [ARROW-10168](https://issues.apache.org/jira/browse/ARROW-10168) - [Rust] [Parquet] Extend arrow schema conversion to projected fields
* [ARROW-10173](https://issues.apache.org/jira/browse/ARROW-10173) - [Rust][DataFusion] Improve performance of equality to a constant predicate support
* [ARROW-10180](https://issues.apache.org/jira/browse/ARROW-10180) - [C++][Doc] Update dependency management docs following aws-sdk-cpp addition
* [ARROW-10182](https://issues.apache.org/jira/browse/ARROW-10182) - [C++] Add basic continuation support to futures
* [ARROW-10191](https://issues.apache.org/jira/browse/ARROW-10191) - [Rust] [Parquet] Add roundtrip tests for single column batches
* [ARROW-10197](https://issues.apache.org/jira/browse/ARROW-10197) - [Gandiva][python] Execute expression on filtered data
* [ARROW-10203](https://issues.apache.org/jira/browse/ARROW-10203) - [Doc] Capture guidance for endianness support in contributors guide.
* [ARROW-10207](https://issues.apache.org/jira/browse/ARROW-10207) - [C++] Unary kernels that results in a list have no preallocated offset buffer
* [ARROW-10208](https://issues.apache.org/jira/browse/ARROW-10208) - [C++] String split kernels do not propagate nulls correctly on sliced input
* [ARROW-10216](https://issues.apache.org/jira/browse/ARROW-10216) - [Rust] Simd implementation of min/max aggregation kernels for primitive types
* [ARROW-10224](https://issues.apache.org/jira/browse/ARROW-10224) - [Python] Add support for Python 3.9 except macOS wheel and Windows wheel
* [ARROW-10225](https://issues.apache.org/jira/browse/ARROW-10225) - [Rust] [Parquet] Fix null bitmap comparisons in roundtrip tests
* [ARROW-10228](https://issues.apache.org/jira/browse/ARROW-10228) - [Julia] Donate Julia Implementation
* [ARROW-10236](https://issues.apache.org/jira/browse/ARROW-10236) - [Rust] [DataFusion] Make DataFusion casting rules consistent with cast kernel
* [ARROW-10241](https://issues.apache.org/jira/browse/ARROW-10241) - [C++][Compute] Add variance kernel benchmark
* [ARROW-10249](https://issues.apache.org/jira/browse/ARROW-10249) - [Rust]: Support Dictionary types for ListArrays in arrow json reader
* [ARROW-10259](https://issues.apache.org/jira/browse/ARROW-10259) - [Rust] Support field metadata
* [ARROW-10261](https://issues.apache.org/jira/browse/ARROW-10261) - [Rust] [BREAKING] Lists should take Field instead of DataType
* [ARROW-10263](https://issues.apache.org/jira/browse/ARROW-10263) - [C++][Compute] Improve numerical stability of variances merging
* [ARROW-10268](https://issues.apache.org/jira/browse/ARROW-10268) - [Rust] Support writing dictionaries to IPC file and stream
* [ARROW-10269](https://issues.apache.org/jira/browse/ARROW-10269) - [Rust] Update nightly: Oct 2020 Edition
* [ARROW-10277](https://issues.apache.org/jira/browse/ARROW-10277) - [C++] Support comparing scalars approximately
* [ARROW-10289](https://issues.apache.org/jira/browse/ARROW-10289) - [Rust] Support reading dictionary streams
* [ARROW-10292](https://issues.apache.org/jira/browse/ARROW-10292) - [Rust] [DataFusion] Simplify merge
* [ARROW-10295](https://issues.apache.org/jira/browse/ARROW-10295) - [Rust] [DataFusion] Simplify accumulators
* [ARROW-10300](https://issues.apache.org/jira/browse/ARROW-10300) - [Rust] Improve benchmark documentation for generating/converting TPC-H data
* [ARROW-10301](https://issues.apache.org/jira/browse/ARROW-10301) - [C++] Add "all" boolean reducing kernel
* [ARROW-10302](https://issues.apache.org/jira/browse/ARROW-10302) - [Python] Don't double-package plasma-store-server
* [ARROW-10304](https://issues.apache.org/jira/browse/ARROW-10304) - [C++][Compute] Optimize variance kernel for integers
* [ARROW-10310](https://issues.apache.org/jira/browse/ARROW-10310) - [C++][Gandiva] Add single argument round() in Gandiva
* [ARROW-10311](https://issues.apache.org/jira/browse/ARROW-10311) - [Release] Update crossbow verification process
* [ARROW-10313](https://issues.apache.org/jira/browse/ARROW-10313) - [C++] Improve UTF8 validation speed and CSV string conversion
* [ARROW-10318](https://issues.apache.org/jira/browse/ARROW-10318) - [C++] Use pimpl idiom in CSV parser
* [ARROW-10319](https://issues.apache.org/jira/browse/ARROW-10319) - [Flight][Go] Add Context to Client Auth Handler functions for Flight
* [ARROW-10320](https://issues.apache.org/jira/browse/ARROW-10320) - [Rust] Convert RecordBatchIterator to a Stream
* [ARROW-10322](https://issues.apache.org/jira/browse/ARROW-10322) - [C++][Dataset] Minimize Expression to a wrapper around compute::Function
* [ARROW-10323](https://issues.apache.org/jira/browse/ARROW-10323) - [Release][wheel] Add missing verification setup step
* [ARROW-10325](https://issues.apache.org/jira/browse/ARROW-10325) - [C++][Compute] Separate aggregate kernel registration
* [ARROW-10328](https://issues.apache.org/jira/browse/ARROW-10328) - [C++] Consider using fast-double-parser
* [ARROW-10330](https://issues.apache.org/jira/browse/ARROW-10330) - [Rust][Datafusion] Implement nullif() function for DataFusion
* [ARROW-10331](https://issues.apache.org/jira/browse/ARROW-10331) - [Rust] [DataFusion] Re-organize errors
* [ARROW-10332](https://issues.apache.org/jira/browse/ARROW-10332) - [Rust] Allow CSV reader to start from a line
* [ARROW-10334](https://issues.apache.org/jira/browse/ARROW-10334) - [Rust] [Parquet] Support reading and writing Arrow NullArray
* [ARROW-10336](https://issues.apache.org/jira/browse/ARROW-10336) - [Rust] Support fromIter and toIter for strings
* [ARROW-10337](https://issues.apache.org/jira/browse/ARROW-10337) - [C++] More liberal parsing of ISO8601 timestamps with fractional seconds
* [ARROW-10338](https://issues.apache.org/jira/browse/ARROW-10338) - [Rust]: Use const fn for applicable methods
* [ARROW-10340](https://issues.apache.org/jira/browse/ARROW-10340) - [Packaging][deb][RPM] Use Python 3.8 for pygit2
* [ARROW-10356](https://issues.apache.org/jira/browse/ARROW-10356) - [Rust] [DataFusion] Add support for is\_in
* [ARROW-10363](https://issues.apache.org/jira/browse/ARROW-10363) - [Python] Remove workaround for CMake bug in manylinux
* [ARROW-10366](https://issues.apache.org/jira/browse/ARROW-10366) - [Rust] [DataFusion] Remove collect from merge
* [ARROW-10375](https://issues.apache.org/jira/browse/ARROW-10375) - [Rust] Remove PrimitiveArrayOps
* [ARROW-10378](https://issues.apache.org/jira/browse/ARROW-10378) - [Rust] Update take() kernel with support for large lists
* [ARROW-10381](https://issues.apache.org/jira/browse/ARROW-10381) - [Rust] Generalize Arrow to support MergeSort
* [ARROW-10382](https://issues.apache.org/jira/browse/ARROW-10382) - [Rust] Fix typos and spelling
* [ARROW-10383](https://issues.apache.org/jira/browse/ARROW-10383) - [Doc] Fix typos and spelling
* [ARROW-10384](https://issues.apache.org/jira/browse/ARROW-10384) - [C++] Fix typos and spelling
* [ARROW-10385](https://issues.apache.org/jira/browse/ARROW-10385) - [C++][Gandiva] Add support for LLVM 11
* [ARROW-10389](https://issues.apache.org/jira/browse/ARROW-10389) - [Rust][DataFusion] Make the custom source implementation API more explicit
* [ARROW-10392](https://issues.apache.org/jira/browse/ARROW-10392) - [C++][Gandiva] Avoid string copy while evaluating IN expression
* [ARROW-10396](https://issues.apache.org/jira/browse/ARROW-10396) - [Rust] [Parquet] Expose SliceableCursor and FileSource
* [ARROW-10398](https://issues.apache.org/jira/browse/ARROW-10398) - [Rust] [Parquet] Re-export parquet::record::api::Field
* [ARROW-10400](https://issues.apache.org/jira/browse/ARROW-10400) - Propagate TLS client peer\_identity when using mutual TLS
* [ARROW-10402](https://issues.apache.org/jira/browse/ARROW-10402) - [Rust] Improve array equality
* [ARROW-10407](https://issues.apache.org/jira/browse/ARROW-10407) - [C++] Division Support in Decimal256
* [ARROW-10408](https://issues.apache.org/jira/browse/ARROW-10408) - [Java] Upgrade Avro dependency to 1.10
* [ARROW-10410](https://issues.apache.org/jira/browse/ARROW-10410) - [Rust] Some refactorings
* [ARROW-10416](https://issues.apache.org/jira/browse/ARROW-10416) - [R] Support Tables in Flight
* [ARROW-10422](https://issues.apache.org/jira/browse/ARROW-10422) - [Rust] Removed unused BinaryArrayBuilder
* [ARROW-10424](https://issues.apache.org/jira/browse/ARROW-10424) - [Rust] Simplify code for impl PrimitiveArray
* [ARROW-10428](https://issues.apache.org/jira/browse/ARROW-10428) - [FlightRPC][Java] Add support for HTTP cookies
* [ARROW-10445](https://issues.apache.org/jira/browse/ARROW-10445) - [Rust] Add DoubleEnded to PrimitiveArrayIter
* [ARROW-10449](https://issues.apache.org/jira/browse/ARROW-10449) - [Rust] Make dictionary keys be a PrimitiveArray
* [ARROW-10454](https://issues.apache.org/jira/browse/ARROW-10454) - [Rust][Datafusion] support creating ParquetExec from externally resolved file list and schema
* [ARROW-10455](https://issues.apache.org/jira/browse/ARROW-10455) - [Rust] Fix CI cache misses on windows
* [ARROW-10458](https://issues.apache.org/jira/browse/ARROW-10458) - [Rust] [Datafusion] context.create\_logical\_plan should not take a mutable self reference
* [ARROW-10464](https://issues.apache.org/jira/browse/ARROW-10464) - [Rust] Implement utility to convert TPC-H tbl files to CSV and Parquet
* [ARROW-10466](https://issues.apache.org/jira/browse/ARROW-10466) - [Rust] [Website] Update implementation status page
* [ARROW-10467](https://issues.apache.org/jira/browse/ARROW-10467) - [FlightRPC][Java] Ability to pass arbitrary client properties to server
* [ARROW-10468](https://issues.apache.org/jira/browse/ARROW-10468) - [C++][Compute] Refactor FunctionExecutor -\> KernelExecutor
* [ARROW-10476](https://issues.apache.org/jira/browse/ARROW-10476) - [Rust] Allow string array to be built from iterator of &str
* [ARROW-10477](https://issues.apache.org/jira/browse/ARROW-10477) - [Rust] Add support for iterators over binary arrays
* [ARROW-10478](https://issues.apache.org/jira/browse/ARROW-10478) - [Dev][Release] Correct Java versions to 3.0.0-SNAPSHOT
* [ARROW-10481](https://issues.apache.org/jira/browse/ARROW-10481) - [R] Bindings to add, remove, replace Table columns
* [ARROW-10483](https://issues.apache.org/jira/browse/ARROW-10483) - [C++] Move Executor into a separate header
* [ARROW-10484](https://issues.apache.org/jira/browse/ARROW-10484) - [C++] Future<{void,Status}\> could be more generic
* [ARROW-10487](https://issues.apache.org/jira/browse/ARROW-10487) - [FlightRPC][C++] Header-based auth in clients
* [ARROW-10490](https://issues.apache.org/jira/browse/ARROW-10490) - [C++][GLib] Fail to build with Xcode 12.0.1
* [ARROW-10492](https://issues.apache.org/jira/browse/ARROW-10492) - [Java][JDBC] Allow users to config the mapping between SQL types and Arrow types
* [ARROW-10504](https://issues.apache.org/jira/browse/ARROW-10504) - [C++] Suppress UBSAN pointer-overflow warning in RapidJSON
* [ARROW-10510](https://issues.apache.org/jira/browse/ARROW-10510) - [Rust] [DataFusion] Add benchmarks for COUNT(DISTINCT)
* [ARROW-10515](https://issues.apache.org/jira/browse/ARROW-10515) - [Julia][Doc] Update lists of supported languages to include Julia
* [ARROW-10522](https://issues.apache.org/jira/browse/ARROW-10522) - [R] Allow rename Table and RecordBatch columns with names()
* [ARROW-10526](https://issues.apache.org/jira/browse/ARROW-10526) - [FlightRPC][C++] HTTP cookie handling in clients
* [ARROW-10530](https://issues.apache.org/jira/browse/ARROW-10530) - [R] Optionally use distro package in linuxlibs.R
* [ARROW-10531](https://issues.apache.org/jira/browse/ARROW-10531) - [Rust] [DataFusion] Better display for logical plans: Graphviz and Schema information
* [ARROW-10539](https://issues.apache.org/jira/browse/ARROW-10539) - [Packaging][Python] Use GitHub Actions to build wheels for Windows
* [ARROW-10540](https://issues.apache.org/jira/browse/ARROW-10540) - [Rust] Allow unary kernels of arbitrary array types
* [ARROW-10541](https://issues.apache.org/jira/browse/ARROW-10541) - [C++] Add re2 library to core arrow / ARROW\_WITH\_RE2
* [ARROW-10542](https://issues.apache.org/jira/browse/ARROW-10542) - [C\#][Flight] Add beginning on flight code for net core
* [ARROW-10543](https://issues.apache.org/jira/browse/ARROW-10543) - [Developer] Update dev instructions to note there may be a timelag
* [ARROW-10552](https://issues.apache.org/jira/browse/ARROW-10552) - [Rust] Remove un-used Result from Buffer
* [ARROW-10559](https://issues.apache.org/jira/browse/ARROW-10559) - [Rust] [DataFusion] Break up logical\_plan/mod.rs into smaller modules
* [ARROW-10561](https://issues.apache.org/jira/browse/ARROW-10561) - [Rust] Simplify \`MutableBuffer::write\` and \`MutableBuffer::write\_bytes\`
* [ARROW-10562](https://issues.apache.org/jira/browse/ARROW-10562) - [Rust] Potential UB on unsafe code
* [ARROW-10566](https://issues.apache.org/jira/browse/ARROW-10566) - [C++] Array validation should work on ArrayData
* [ARROW-10567](https://issues.apache.org/jira/browse/ARROW-10567) - [C++][FlightRPC] Add options to help increase precision of arrow-flight-benchmark
* [ARROW-10572](https://issues.apache.org/jira/browse/ARROW-10572) - [Rust][DataFusion] Use aHash and std::collections hashmap for aggregates / distinct
* [ARROW-10574](https://issues.apache.org/jira/browse/ARROW-10574) - [Python][Parquet] Allow collections for 'in' / 'not in' filter (in addition to sets)
* [ARROW-10575](https://issues.apache.org/jira/browse/ARROW-10575) - [Rust] Rename union.rs to be cosistent with other arrays
* [ARROW-10581](https://issues.apache.org/jira/browse/ARROW-10581) - [Doc] IPC dictionary reference to relevant section
* [ARROW-10582](https://issues.apache.org/jira/browse/ARROW-10582) - [Rust] [DataFusion] Implement "repartition" operator
* [ARROW-10584](https://issues.apache.org/jira/browse/ARROW-10584) - [Rust] [DataFusion] Implement SQL join support using explicit JOIN ON syntax
* [ARROW-10585](https://issues.apache.org/jira/browse/ARROW-10585) - [Rust] [DataFusion] Add join support to DataFrame and LogicalPlan
* [ARROW-10586](https://issues.apache.org/jira/browse/ARROW-10586) - [Rust] [DataFusion] Add join support to query planner
* [ARROW-10589](https://issues.apache.org/jira/browse/ARROW-10589) - [Rust]: Implement AVX-512 bit and operation
* [ARROW-10590](https://issues.apache.org/jira/browse/ARROW-10590) - [Rust] Remove Date32(Millisecond) from test
* [ARROW-10591](https://issues.apache.org/jira/browse/ARROW-10591) - [Rust] Add support to structArrays for MutableArrayData
* [ARROW-10595](https://issues.apache.org/jira/browse/ARROW-10595) - [Rust] Simplify inner loop of min/max kernels for non-null case
* [ARROW-10596](https://issues.apache.org/jira/browse/ARROW-10596) - [Rust] Improve take benchmark
* [ARROW-10598](https://issues.apache.org/jira/browse/ARROW-10598) - [C++] Improve performance of GenerateBitsUnrolled
* [ARROW-10604](https://issues.apache.org/jira/browse/ARROW-10604) - [Ruby] Support Decimal256 type
* [ARROW-10607](https://issues.apache.org/jira/browse/ARROW-10607) - [C++][Parquet] Support Reading/Writing Decimal256 type in Parquet
* [ARROW-10609](https://issues.apache.org/jira/browse/ARROW-10609) - [Rust] Optimize min/max of non null strings
* [ARROW-10628](https://issues.apache.org/jira/browse/ARROW-10628) - [Rust] Make clippy error on clippy warnings
* [ARROW-10633](https://issues.apache.org/jira/browse/ARROW-10633) - [Rust][DataFusion] Dependency version upgrades
* [ARROW-10634](https://issues.apache.org/jira/browse/ARROW-10634) - [C\#][CI] Change the build version from 2.2 to 3.1 in CI
* [ARROW-10636](https://issues.apache.org/jira/browse/ARROW-10636) - [Rust] Remove specialisation from Rust parquet
* [ARROW-10637](https://issues.apache.org/jira/browse/ARROW-10637) - [Rust] Add examples to boolean kernels
* [ARROW-10638](https://issues.apache.org/jira/browse/ARROW-10638) - [Rust] Improve tests of boolean kernels
* [ARROW-10639](https://issues.apache.org/jira/browse/ARROW-10639) - [Rust] Simplify signature of is\_null and add example
* [ARROW-10644](https://issues.apache.org/jira/browse/ARROW-10644) - [Python] Consolidate path/filesystem handling in pyarrow.dataset and pyarrow.fs
* [ARROW-10646](https://issues.apache.org/jira/browse/ARROW-10646) - [C++][FlightRPC] Disable flaky test
* [ARROW-10648](https://issues.apache.org/jira/browse/ARROW-10648) - [Java] Prepare Java codebase for source release without requiring any git tags to be created or pushed
* [ARROW-10651](https://issues.apache.org/jira/browse/ARROW-10651) - [C++] alloc-dealloc-mismatch in s3fs.cc
* [ARROW-10652](https://issues.apache.org/jira/browse/ARROW-10652) - [C++][Gandiva] Make gandiva cache size configurable
* [ARROW-10653](https://issues.apache.org/jira/browse/ARROW-10653) - [Rust]: Update toolchain version to bring new features
* [ARROW-10654](https://issues.apache.org/jira/browse/ARROW-10654) - [Rust] Specialize parsing of floats / bools
* [ARROW-10660](https://issues.apache.org/jira/browse/ARROW-10660) - [Rust] Implement AVX-512 bit or operation
* [ARROW-10665](https://issues.apache.org/jira/browse/ARROW-10665) - [Rust] Add fast paths for common utf8 like patterns
* [ARROW-10666](https://issues.apache.org/jira/browse/ARROW-10666) - [Rust] [DataFusion] Support nested SELECT statements
* [ARROW-10669](https://issues.apache.org/jira/browse/ARROW-10669) - [C++][Compute] Support Scalar inputs to boolean kernels
* [ARROW-10672](https://issues.apache.org/jira/browse/ARROW-10672) - [Rust] [DataFusion] Make limit be computed as a stream
* [ARROW-10673](https://issues.apache.org/jira/browse/ARROW-10673) - [Rust] [DataFusion] Make sort be computed on the stream
* [ARROW-10674](https://issues.apache.org/jira/browse/ARROW-10674) - [Rust] Add integration tests for Decimal type
* [ARROW-10677](https://issues.apache.org/jira/browse/ARROW-10677) - [Rust] Fix Bug and Add tests as documentation showing supported csv parsing
* [ARROW-10679](https://issues.apache.org/jira/browse/ARROW-10679) - [Rust] [DataFusion] Implement SQL CASE WHEN physical expression
* [ARROW-10680](https://issues.apache.org/jira/browse/ARROW-10680) - [Rust] [DataFusion] Implement TPC-H Query 12
* [ARROW-10682](https://issues.apache.org/jira/browse/ARROW-10682) - [Rust] Sort kernel performance tuning
* [ARROW-10685](https://issues.apache.org/jira/browse/ARROW-10685) - [Rust] [DataFusion] Add support for join on filter pushdown optimizer
* [ARROW-10688](https://issues.apache.org/jira/browse/ARROW-10688) - [Rust] [DataFusion] Support CASE WHEN from DataFrame API
* [ARROW-10689](https://issues.apache.org/jira/browse/ARROW-10689) - [Rust] [DataFusion] Support CASE WHEN from SQL
* [ARROW-10693](https://issues.apache.org/jira/browse/ARROW-10693) - [Rust] [DataFusion] Add support for the left join
* [ARROW-10696](https://issues.apache.org/jira/browse/ARROW-10696) - [C++] Investigate a bit run reader that would only return runs of set bits
* [ARROW-10697](https://issues.apache.org/jira/browse/ARROW-10697) - [C++] Consolidate bitmap word readers
* [ARROW-10703](https://issues.apache.org/jira/browse/ARROW-10703) - [Rust] [DataFusion] Make join not collect left on every part
* [ARROW-10704](https://issues.apache.org/jira/browse/ARROW-10704) - [Rust][DataFusion] Remove Nested from expression enum
* [ARROW-10708](https://issues.apache.org/jira/browse/ARROW-10708) - [Packaging][deb] Add support for Ubuntu 20.10
* [ARROW-10709](https://issues.apache.org/jira/browse/ARROW-10709) - [Python] Difficult to make an efficient zero-copy file reader in Python
* [ARROW-10712](https://issues.apache.org/jira/browse/ARROW-10712) - [Rust] [DataFusion] Add tests to TPC-H benchmarks
* [ARROW-10717](https://issues.apache.org/jira/browse/ARROW-10717) - [Rust] [DataFusion] Add support for right join
* [ARROW-10720](https://issues.apache.org/jira/browse/ARROW-10720) - [C++] Add BasicDecimal256 Rescale Support
* [ARROW-10721](https://issues.apache.org/jira/browse/ARROW-10721) - [C\#][CI] Use .NET 3.1 by default
* [ARROW-10722](https://issues.apache.org/jira/browse/ARROW-10722) - [Rust][DataFusion] Reduce overhead in data types in aggregations / joins, improve benchmarks
* [ARROW-10723](https://issues.apache.org/jira/browse/ARROW-10723) - [Packaging][deb][RPM] Enable Parquet encription
* [ARROW-10724](https://issues.apache.org/jira/browse/ARROW-10724) - [Developer Tools] Add labeler to when PRs need rebase
* [ARROW-10725](https://issues.apache.org/jira/browse/ARROW-10725) - [Python][Compute] Exposing bindings for sort options
* [ARROW-10728](https://issues.apache.org/jira/browse/ARROW-10728) - [Rust] [DataFusion] Add SQL support for JOIN with USING clause
* [ARROW-10729](https://issues.apache.org/jira/browse/ARROW-10729) - [Rust] [DataFusion] Add SQL support for JOIN using implicit syntax
* [ARROW-10732](https://issues.apache.org/jira/browse/ARROW-10732) - [Rust] [DataFusion] Add SQL support for table/relation aliases and compound identifiers
* [ARROW-10733](https://issues.apache.org/jira/browse/ARROW-10733) - [R] Improvements to Linux installation troubleshooting
* [ARROW-10740](https://issues.apache.org/jira/browse/ARROW-10740) - [Rust][DataFusion] Remove redundant clones found by clippy
* [ARROW-10741](https://issues.apache.org/jira/browse/ARROW-10741) - Apply clippy lints to source code, remove them from ignore list
* [ARROW-10742](https://issues.apache.org/jira/browse/ARROW-10742) - [Python] Mask not checked when creating array from numpy array
* [ARROW-10745](https://issues.apache.org/jira/browse/ARROW-10745) - [Rust] Allocate padding bytes in filter context
* [ARROW-10747](https://issues.apache.org/jira/browse/ARROW-10747) - [Rust] Optimizations for csv reader
* [ARROW-10750](https://issues.apache.org/jira/browse/ARROW-10750) - [Rust] [DataFusion] Add SQL support for LEFT and RIGHT join
* [ARROW-10752](https://issues.apache.org/jira/browse/ARROW-10752) - [GLib] Add garrow\_schema\_has\_metadata()
* [ARROW-10754](https://issues.apache.org/jira/browse/ARROW-10754) - [GLib] Add support for metadata to GArrowField
* [ARROW-10755](https://issues.apache.org/jira/browse/ARROW-10755) - [Rust] [Parquet] Add support for writing boolean type
* [ARROW-10756](https://issues.apache.org/jira/browse/ARROW-10756) - [Rust] Clippy - fix reduntant clone
* [ARROW-10759](https://issues.apache.org/jira/browse/ARROW-10759) - [Rust][DataFusion] Implement support for casting string to date in sql expressions
* [ARROW-10763](https://issues.apache.org/jira/browse/ARROW-10763) - [Rust] Speed up take kernels
* [ARROW-10765](https://issues.apache.org/jira/browse/ARROW-10765) - [Rust] Optimize take strings for non-null arrays
* [ARROW-10767](https://issues.apache.org/jira/browse/ARROW-10767) - [Rust] Speed up sum kernel with nulls
* [ARROW-10770](https://issues.apache.org/jira/browse/ARROW-10770) - [Rust] Support reading nested JSON lists
* [ARROW-10772](https://issues.apache.org/jira/browse/ARROW-10772) - [Rust] Improve take performance
* [ARROW-10775](https://issues.apache.org/jira/browse/ARROW-10775) - [Rust][DataFusion] Use ahash in hash join
* [ARROW-10776](https://issues.apache.org/jira/browse/ARROW-10776) - [C++] Provide iterator access to primitive elements inside an Array
* [ARROW-10781](https://issues.apache.org/jira/browse/ARROW-10781) - [Rust] [DataFusion] TableProvider should provide row count statistics
* [ARROW-10783](https://issues.apache.org/jira/browse/ARROW-10783) - [Rust] [DataFusion] Implement row count statistics for Parquet TableProvider
* [ARROW-10785](https://issues.apache.org/jira/browse/ARROW-10785) - Further optimize take string
* [ARROW-10786](https://issues.apache.org/jira/browse/ARROW-10786) - [Packaging][RPM] Drop support for CentOS 6
* [ARROW-10788](https://issues.apache.org/jira/browse/ARROW-10788) - [C++] Make S3 recursive walks parallel
* [ARROW-10789](https://issues.apache.org/jira/browse/ARROW-10789) - [Rust][DataFusion] Make TableProvider dynamically typed
* [ARROW-10790](https://issues.apache.org/jira/browse/ARROW-10790) - [C++][Compute] Investigate ChunkedArray sort performance
* [ARROW-10792](https://issues.apache.org/jira/browse/ARROW-10792) - [Rust] [CI] Modulararize CI for faster and smaller builds
* [ARROW-10795](https://issues.apache.org/jira/browse/ARROW-10795) - [Rust] Fix specialization for arrow datatypes
* [ARROW-10796](https://issues.apache.org/jira/browse/ARROW-10796) - [C++] Investigate RecordBatch sort performance
* [ARROW-10800](https://issues.apache.org/jira/browse/ARROW-10800) - [Rust] [Parquet] Provide access to the elements of parquet::record::{List, Map}
* [ARROW-10802](https://issues.apache.org/jira/browse/ARROW-10802) - [C++] Remove Dictionary[NullType] special casing in parquet column writer
* [ARROW-10808](https://issues.apache.org/jira/browse/ARROW-10808) - [Rust] [DataFusion] Support nested expressions in aggregations
* [ARROW-10809](https://issues.apache.org/jira/browse/ARROW-10809) - [C++] Use Datum for SortIndices() input
* [ARROW-10812](https://issues.apache.org/jira/browse/ARROW-10812) - [Rust] Make BooleanArray not a PrimitiveArray
* [ARROW-10813](https://issues.apache.org/jira/browse/ARROW-10813) - [Rust] [DataFusion] Implement DFSchema
* [ARROW-10814](https://issues.apache.org/jira/browse/ARROW-10814) - [Packaging][deb] Drop support for Debian GNU/Linux Stretch
* [ARROW-10817](https://issues.apache.org/jira/browse/ARROW-10817) - [Rust] [DataFusion] Implement TypedString
* [ARROW-10820](https://issues.apache.org/jira/browse/ARROW-10820) - [Rust] [DataFusion] Complete TPC-H Benchmark Queries
* [ARROW-10821](https://issues.apache.org/jira/browse/ARROW-10821) - [Rust] [Datafusion] implement negative expression
* [ARROW-10822](https://issues.apache.org/jira/browse/ARROW-10822) - [Rust] [Datafusion] support compiling datafusion with simd support
* [ARROW-10824](https://issues.apache.org/jira/browse/ARROW-10824) - [Rust] Added PartialEq for NullArray
* [ARROW-10825](https://issues.apache.org/jira/browse/ARROW-10825) - [Rust] Add support to NullArrays for MutableArrayData
* [ARROW-10826](https://issues.apache.org/jira/browse/ARROW-10826) - [Rust] Add support for FixedSizeBinary to MutableArrayData
* [ARROW-10827](https://issues.apache.org/jira/browse/ARROW-10827) - [Rust] Extend concatenate to all types
* [ARROW-10828](https://issues.apache.org/jira/browse/ARROW-10828) - [Rust][DataFusion] Enable more clippy lints
* [ARROW-10829](https://issues.apache.org/jira/browse/ARROW-10829) - [Rust] [DataFusion] Implement Into<Schema\> for DFSchema
* [ARROW-10832](https://issues.apache.org/jira/browse/ARROW-10832) - [Rust] Evaluate latest snapshot flatc
* [ARROW-10836](https://issues.apache.org/jira/browse/ARROW-10836) - [Rust] Extend take kernel to FixedSizeListArray
* [ARROW-10838](https://issues.apache.org/jira/browse/ARROW-10838) - [Rust] [CI] Add CI for wasm32 target
* [ARROW-10839](https://issues.apache.org/jira/browse/ARROW-10839) - [Rust] [DataFusion] Implement BETWEEN Operator
* [ARROW-10843](https://issues.apache.org/jira/browse/ARROW-10843) - [C++] Add support for temporal types in sort family kernels
* [ARROW-10845](https://issues.apache.org/jira/browse/ARROW-10845) - [Python][CI] Add python CI build using numpy nightly
* [ARROW-10849](https://issues.apache.org/jira/browse/ARROW-10849) - [Python] Handle numpy deprecation warnings for builtin type aliases
* [ARROW-10851](https://issues.apache.org/jira/browse/ARROW-10851) - [C++] Reduce code size of vector\_sort.cc
* [ARROW-10857](https://issues.apache.org/jira/browse/ARROW-10857) - [Packaging] Follow PowerTools repository name change on CentOS 8
* [ARROW-10858](https://issues.apache.org/jira/browse/ARROW-10858) - [C++][MSVC] Add missing Boost dependency
* [ARROW-10861](https://issues.apache.org/jira/browse/ARROW-10861) - [Python] Update minimal NumPy version to 1.16.6
* [ARROW-10864](https://issues.apache.org/jira/browse/ARROW-10864) - [Rust] Use standard ordering for floats
* [ARROW-10865](https://issues.apache.org/jira/browse/ARROW-10865) - [Rust][DataFusion] More ergonomic conversion between Schema, SchemaRef, DFSchema, and DFSchemaRef
* [ARROW-10867](https://issues.apache.org/jira/browse/ARROW-10867) - build failure on aarch64 with -DARROW\_PYTHON=ON and gcc
* [ARROW-10869](https://issues.apache.org/jira/browse/ARROW-10869) - [GLib] Add garrow\_\*\_sort\_indices() and related options
* [ARROW-10870](https://issues.apache.org/jira/browse/ARROW-10870) - [Julia] Update website with Julia implementation
* [ARROW-10871](https://issues.apache.org/jira/browse/ARROW-10871) - [Julia] Setup Julia CI via GitHub Actions
* [ARROW-10873](https://issues.apache.org/jira/browse/ARROW-10873) - [C++] Apple Silicon is reported as arm64 in CMake
* [ARROW-10874](https://issues.apache.org/jira/browse/ARROW-10874) - [Rust][DataFusion] Add table statistics for MemTable
* [ARROW-10877](https://issues.apache.org/jira/browse/ARROW-10877) - [Rust] [DataFusion] Add benchmark based on kaggle movies
* [ARROW-10878](https://issues.apache.org/jira/browse/ARROW-10878) - [Rust] Simplify extend\_from\_slice
* [ARROW-10879](https://issues.apache.org/jira/browse/ARROW-10879) - [Packaging][deb] Restore Debian GNU/Linux Buster configuration
* [ARROW-10881](https://issues.apache.org/jira/browse/ARROW-10881) - [C++] EXC\_BAD\_ACCESS in BaseSetBitRunReader<false\>::NextRun
* [ARROW-10885](https://issues.apache.org/jira/browse/ARROW-10885) - [Rust][DataFusion] Optimize join build vs probe based on statistics on row number
* [ARROW-10887](https://issues.apache.org/jira/browse/ARROW-10887) - [C++][Doc] Document IPC API
* [ARROW-10889](https://issues.apache.org/jira/browse/ARROW-10889) - [Rust] Document our approach to unsafe code in README
* [ARROW-10890](https://issues.apache.org/jira/browse/ARROW-10890) - [Rust] [DataFusion] JOIN support
* [ARROW-10891](https://issues.apache.org/jira/browse/ARROW-10891) - [Rust][DataFusion] More clippy lints
* [ARROW-10893](https://issues.apache.org/jira/browse/ARROW-10893) - [Rust] [DataFusion] Easier clippy fixes
* [ARROW-10896](https://issues.apache.org/jira/browse/ARROW-10896) - [C++][CMake] Rename internal RE2 package name to "re2" from "RE2"
* [ARROW-10900](https://issues.apache.org/jira/browse/ARROW-10900) - [Rust][DataFusion] Resolve TableScan provider eagerly
* [ARROW-10904](https://issues.apache.org/jira/browse/ARROW-10904) - [Python] Add support for Python 3.9 macOS wheels
* [ARROW-10905](https://issues.apache.org/jira/browse/ARROW-10905) - [Python] Add support for Python 3.9 windows wheels
* [ARROW-10908](https://issues.apache.org/jira/browse/ARROW-10908) - [Rust] [DataFusion] Update relevant tpch-queries with BETWEEN
* [ARROW-10917](https://issues.apache.org/jira/browse/ARROW-10917) - [Rust][Doc] Update feature matrix
* [ARROW-10918](https://issues.apache.org/jira/browse/ARROW-10918) - [C++][Doc] Document supported Parquet features
* [ARROW-10927](https://issues.apache.org/jira/browse/ARROW-10927) - [Rust] [Parquet] Add Decimal to ArrayBuilderReader for physical type fixed size binary
* [ARROW-10927](https://issues.apache.org/jira/browse/ARROW-10927) - [Rust] [Parquet] Add Decimal to ArrayBuilderReader for physical type fixed size binary
* [ARROW-10927](https://issues.apache.org/jira/browse/ARROW-10927) - [Rust] [Parquet] Add Decimal to ArrayBuilderReader for physical type fixed size binary
* [ARROW-10929](https://issues.apache.org/jira/browse/ARROW-10929) - [Rust] Migrate CI tests to stable rust
* [ARROW-10933](https://issues.apache.org/jira/browse/ARROW-10933) - [Rust] Update docs in regard to stable rust
* [ARROW-10934](https://issues.apache.org/jira/browse/ARROW-10934) - [Python] Tests are failed with fsspec-0.8.5
* [ARROW-10938](https://issues.apache.org/jira/browse/ARROW-10938) - [Rust] upgrade dependency "flatbuffers" to 0.8
* [ARROW-10940](https://issues.apache.org/jira/browse/ARROW-10940) - [Rust] Extend sort kernel to ListArray
* [ARROW-10941](https://issues.apache.org/jira/browse/ARROW-10941) - [Doc][C++] Document supported Parquet encryption features
* [ARROW-10944](https://issues.apache.org/jira/browse/ARROW-10944) - [Rust] Implement min/max kernels for BooleanArray
* [ARROW-10946](https://issues.apache.org/jira/browse/ARROW-10946) - [Rust] Make ChunkIter not depend on a buffer
* [ARROW-10947](https://issues.apache.org/jira/browse/ARROW-10947) - [Rust][DataFusion] Refactor UTF8 to Date32 for Performance
* [ARROW-10948](https://issues.apache.org/jira/browse/ARROW-10948) - [C++] Always use GTestConfig.cmake
* [ARROW-10949](https://issues.apache.org/jira/browse/ARROW-10949) - [Rust] Avoid clones in getting values of boolean arrays
* [ARROW-10951](https://issues.apache.org/jira/browse/ARROW-10951) - [Python][CI] Nightly pandas builds failing because of pytest monkeypatch issue
* [ARROW-10952](https://issues.apache.org/jira/browse/ARROW-10952) - [Rust] Add pre-commit hook
* [ARROW-10966](https://issues.apache.org/jira/browse/ARROW-10966) - [C++] Use FnOnce for ThreadPool's tasks instead of std::function
* [ARROW-10968](https://issues.apache.org/jira/browse/ARROW-10968) - [Rust][DataFusion] Don't build hash table for right side of the join
* [ARROW-10969](https://issues.apache.org/jira/browse/ARROW-10969) - [Rust][DataFusion] Implement ANSI SQL Functions
* [ARROW-10985](https://issues.apache.org/jira/browse/ARROW-10985) - [Rust] Update unsafe guidelines for adding JIRA references
* [ARROW-10986](https://issues.apache.org/jira/browse/ARROW-10986) - [Rust][DataFusion] Add average statistic to TCP-H benchmark too
* [ARROW-10988](https://issues.apache.org/jira/browse/ARROW-10988) - [C++] Require CMake 3.5 or later
* [ARROW-10989](https://issues.apache.org/jira/browse/ARROW-10989) - [Rust] Use slices for iterating primitive arrays
* [ARROW-10993](https://issues.apache.org/jira/browse/ARROW-10993) - [CI][macOS] Fix Python 3.9 installation by Homebrew
* [ARROW-10995](https://issues.apache.org/jira/browse/ARROW-10995) - [Rust] [DataFusion] Improve parallelism when reading Parquet files
* [ARROW-11004](https://issues.apache.org/jira/browse/ARROW-11004) - [FlightRPC][Python] Header-based auth in clients
* [ARROW-11005](https://issues.apache.org/jira/browse/ARROW-11005) - [Rust] Remove indirection from take kernel and simplify interface
* [ARROW-11008](https://issues.apache.org/jira/browse/ARROW-11008) - [Rust][DataFusion] Simplify count accumulator
* [ARROW-11009](https://issues.apache.org/jira/browse/ARROW-11009) - [Python] Add environment variable to elect default usage of system memory allocator instead of jemalloc/mimalloc
* [ARROW-11010](https://issues.apache.org/jira/browse/ARROW-11010) - [Python] \`np.float\` deprecation warning in \`\_pandas\_logical\_type\_map\`
* [ARROW-11012](https://issues.apache.org/jira/browse/ARROW-11012) - [Rust] [DataFusion] Make write\_csv and write\_parquet concurrent
* [ARROW-11015](https://issues.apache.org/jira/browse/ARROW-11015) - [CI][Gandiva] Move gandiva nightly build from travis to github action
* [ARROW-11018](https://issues.apache.org/jira/browse/ARROW-11018) - [Rust][DataFusion] Add null count column statistics
* [ARROW-11026](https://issues.apache.org/jira/browse/ARROW-11026) - [Rust]: Run tests without requiring environment variables
* [ARROW-11028](https://issues.apache.org/jira/browse/ARROW-11028) - [Rust] Somewhat pedantic pattern-matches
* [ARROW-11029](https://issues.apache.org/jira/browse/ARROW-11029) - [Rust] [DataFusion] Document why join order optimization does not work with filter pushdown
* [ARROW-11032](https://issues.apache.org/jira/browse/ARROW-11032) - [C++][FlightRPC] Add benchmark for local RPC through unix socket
* [ARROW-11033](https://issues.apache.org/jira/browse/ARROW-11033) - [Rust] CSV writer performance improvements
* [ARROW-11034](https://issues.apache.org/jira/browse/ARROW-11034) - [Rust] rustfmt cleanup
* [ARROW-11035](https://issues.apache.org/jira/browse/ARROW-11035) - [Rust] Improve performance of cast to utf8 via FromIter
* [ARROW-11037](https://issues.apache.org/jira/browse/ARROW-11037) - [Rust] Improve performance of string fromIter
* [ARROW-11038](https://issues.apache.org/jira/browse/ARROW-11038) - [Rust] Remove \`BufferBuilderTrait\` and associated Result requirement.
* [ARROW-11039](https://issues.apache.org/jira/browse/ARROW-11039) - [Rust] Improve performance for utf8 to float cast
* [ARROW-11040](https://issues.apache.org/jira/browse/ARROW-11040) - [Rust] Simplify builders with generics
* [ARROW-11042](https://issues.apache.org/jira/browse/ARROW-11042) - [Rust][DataFusion] Increase default batch size
* [ARROW-11043](https://issues.apache.org/jira/browse/ARROW-11043) - [C++] Add "is\_nan" kernel
* [ARROW-11046](https://issues.apache.org/jira/browse/ARROW-11046) - [Rust][DataFusion] Add count\_distinct to dataframe API
* [ARROW-11049](https://issues.apache.org/jira/browse/ARROW-11049) - [Python] Expose alternate memory pools
* [ARROW-11052](https://issues.apache.org/jira/browse/ARROW-11052) - [Rust] [DataFusion] Implement metrics in join operator
* [ARROW-11053](https://issues.apache.org/jira/browse/ARROW-11053) - [Rust] [DataFusion] Optimize joins with dynamic capacity for output batches
* [ARROW-11054](https://issues.apache.org/jira/browse/ARROW-11054) - Update SQLParser to 0.70
* [ARROW-11055](https://issues.apache.org/jira/browse/ARROW-11055) - [Rust] [DataFusion] Support date\_trunc function
* [ARROW-11058](https://issues.apache.org/jira/browse/ARROW-11058) - [Rust] [DataFusion] Implement "coalesce batches" operator
* [ARROW-11063](https://issues.apache.org/jira/browse/ARROW-11063) - [Rust] Validate null counts when building arrays
* [ARROW-11064](https://issues.apache.org/jira/browse/ARROW-11064) - [Rust][DataFusion] Speed up hash join on smaller batches
* [ARROW-11072](https://issues.apache.org/jira/browse/ARROW-11072) - [Rust] [Parquet] Support int32 and int64 physical types
* [ARROW-11076](https://issues.apache.org/jira/browse/ARROW-11076) - [Rust][DataFusion] Refactor usage of right indices in hash join
* [ARROW-11079](https://issues.apache.org/jira/browse/ARROW-11079) - [R] Catch up on changelog since 2.0
* [ARROW-11080](https://issues.apache.org/jira/browse/ARROW-11080) - [C++][Dataset] Improvements to implicit casting
* [ARROW-11082](https://issues.apache.org/jira/browse/ARROW-11082) - [Rust] Add FFI for LargeUtf8
* [ARROW-11086](https://issues.apache.org/jira/browse/ARROW-11086) - [Rust] Extend take to support more index types
* [ARROW-11091](https://issues.apache.org/jira/browse/ARROW-11091) - [Rust][DataFusion] Fix clippy warning in rust 1.49
* [ARROW-11095](https://issues.apache.org/jira/browse/ARROW-11095) - [Python] Access pyarrow.RecordBatch column by name
* [ARROW-11096](https://issues.apache.org/jira/browse/ARROW-11096) - [Rust] Add FFI for [Large]Binary
* [ARROW-11097](https://issues.apache.org/jira/browse/ARROW-11097) - [Rust] Simplify tests
* [ARROW-11099](https://issues.apache.org/jira/browse/ARROW-11099) - [Rust]: Remove unsafe value\_slice method from PrimitiveArray and BooleanArray
* [ARROW-11100](https://issues.apache.org/jira/browse/ARROW-11100) - [Rust] Speed up numeric to string cast using lexical\_core
* [ARROW-11101](https://issues.apache.org/jira/browse/ARROW-11101) - [Rust] enable "cargo +nightly fmt" in git pre-commit hook
* [ARROW-11104](https://issues.apache.org/jira/browse/ARROW-11104) - [GLib] Add append\_null/append\_nulls to GArrowArrayBuilder and use them
* [ARROW-11105](https://issues.apache.org/jira/browse/ARROW-11105) - [Rust] Favor From/Into traits in MutableBuffer
* [ARROW-11109](https://issues.apache.org/jira/browse/ARROW-11109) - [GLib] Add garrow\_array\_builder\_append\_empty\_value() and values()
* [ARROW-11110](https://issues.apache.org/jira/browse/ARROW-11110) - [Rust] [Datafusion] context.table should not take a mutable self reference
* [ARROW-11111](https://issues.apache.org/jira/browse/ARROW-11111) - [GLib] Add GArrowFixedSizeBinaryArrayBuilder
* [ARROW-11121](https://issues.apache.org/jira/browse/ARROW-11121) - [Developer] Use pull\_request\_target for PR JIRA integration
* [ARROW-11122](https://issues.apache.org/jira/browse/ARROW-11122) - [Rust] Add FFI for date and time
* [ARROW-11124](https://issues.apache.org/jira/browse/ARROW-11124) - [Doc] Update status matrix for Decimal256
* [ARROW-11125](https://issues.apache.org/jira/browse/ARROW-11125) - [Rust] Implement logical equality for list arrays
* [ARROW-11126](https://issues.apache.org/jira/browse/ARROW-11126) - [Rust] Document and test ARROW-10656
* [ARROW-11127](https://issues.apache.org/jira/browse/ARROW-11127) - [C++] Unused cpu\_info on non-x86 architecture
* [ARROW-11129](https://issues.apache.org/jira/browse/ARROW-11129) - [Rust][DataFusion] Use tokio thread pool for loading parquet
* [ARROW-11130](https://issues.apache.org/jira/browse/ARROW-11130) - [Website][CentOS 8][RHEL 8] Enable all required repositories by default
* [ARROW-11131](https://issues.apache.org/jira/browse/ARROW-11131) - [Rust] Improve performance of bool\_equal
* [ARROW-11136](https://issues.apache.org/jira/browse/ARROW-11136) - [R] Bindings for is.nan
* [ARROW-11137](https://issues.apache.org/jira/browse/ARROW-11137) - [Rust][DataFusion] Fix Clippy needless\_range\_loop, needless\_lifetimes
* [ARROW-11138](https://issues.apache.org/jira/browse/ARROW-11138) - [Rust] [DataFusion] Support ltrim, rtrim
* [ARROW-11139](https://issues.apache.org/jira/browse/ARROW-11139) - [GLib] Add support for extension type
* [ARROW-11155](https://issues.apache.org/jira/browse/ARROW-11155) - [C++][Packaging] Move gandiva crossbow jobs off of Travis-CI
* [ARROW-11158](https://issues.apache.org/jira/browse/ARROW-11158) - [Julia] Implement Decimal256 support
* [ARROW-11159](https://issues.apache.org/jira/browse/ARROW-11159) - [Developer] Consolidate pull request related jobs
* [ARROW-11165](https://issues.apache.org/jira/browse/ARROW-11165) - [Rust] [DataFusion] Document the desired SQL dialect for DataFusion
* [ARROW-11168](https://issues.apache.org/jira/browse/ARROW-11168) - [Rust] Fix cargo doc warnings
* [ARROW-11169](https://issues.apache.org/jira/browse/ARROW-11169) - [Rust] Add a comment explaining where float total\_order algorithm came from
* [ARROW-11175](https://issues.apache.org/jira/browse/ARROW-11175) - [R] Small docs fixes
* [ARROW-11176](https://issues.apache.org/jira/browse/ARROW-11176) - [R] Expose memory pool name and document setting it
* [ARROW-11187](https://issues.apache.org/jira/browse/ARROW-11187) - [Rust] [Parquet] Pin specific parquet-format-rs version
* [ARROW-11188](https://issues.apache.org/jira/browse/ARROW-11188) - [Rust] Implement crypto functions from PostgreSQL dialect
* [ARROW-11193](https://issues.apache.org/jira/browse/ARROW-11193) - [Documentation] Add docs for Java ListVector
* [ARROW-11194](https://issues.apache.org/jira/browse/ARROW-11194) - [Rust] Enable SIMD for aarch64
* [ARROW-11195](https://issues.apache.org/jira/browse/ARROW-11195) - [Rust] [DataFusion] Built-in table providers should expose relevant fields
* [ARROW-11196](https://issues.apache.org/jira/browse/ARROW-11196) - [GLib] Add support for mock, HDFS and S3 file systems with factory function
* [ARROW-11198](https://issues.apache.org/jira/browse/ARROW-11198) - [Packaging][Python] Ensure setuptools version during build supports markdown
* [ARROW-11200](https://issues.apache.org/jira/browse/ARROW-11200) - [Rust] [DateFusion] Physical operators and expressions should have public accessor methods
* [ARROW-11201](https://issues.apache.org/jira/browse/ARROW-11201) - [Rust] create\_batch\_empty - support more types
* [ARROW-11203](https://issues.apache.org/jira/browse/ARROW-11203) - [Developer][Website] Enable JIRA and pull request integration
* [ARROW-11204](https://issues.apache.org/jira/browse/ARROW-11204) - [C++] Fix build failure with bundled gRPC and Protobuf
* [ARROW-11205](https://issues.apache.org/jira/browse/ARROW-11205) - [GLib][Dataset] Add GADFileFormat and its family
* [ARROW-11209](https://issues.apache.org/jira/browse/ARROW-11209) - [Rust] DF - Provide better error message on unsupported GROUP BY
* [ARROW-11210](https://issues.apache.org/jira/browse/ARROW-11210) - [CI] Restore workflows that had been blocked by INFRA
* [ARROW-11212](https://issues.apache.org/jira/browse/ARROW-11212) - [Packaging][Python] Use vcpkg as dependency source for manylinux and windows wheels
* [ARROW-11213](https://issues.apache.org/jira/browse/ARROW-11213) - [Packaging][Python] Dockerize wheel building on windows
* [ARROW-11215](https://issues.apache.org/jira/browse/ARROW-11215) - [CI] Use named volumes by default for caching in docker-compose
* [ARROW-11218](https://issues.apache.org/jira/browse/ARROW-11218) - [R] Make SubTreeFileSystem print method more informative
* [ARROW-11219](https://issues.apache.org/jira/browse/ARROW-11219) - [CI][Ruby][MinGW] Reduce CI time
* [ARROW-11221](https://issues.apache.org/jira/browse/ARROW-11221) - [Rust] DF Implement GROUP BY support for Float32/Float64
* [ARROW-11231](https://issues.apache.org/jira/browse/ARROW-11231) - [Packaging] Add mimalloc to Linux builds
* [ARROW-11234](https://issues.apache.org/jira/browse/ARROW-11234) - [CI][Ruby][macOS] Reduce CI time
* [ARROW-11236](https://issues.apache.org/jira/browse/ARROW-11236) - [Java] Bump Jackson to 2.11.4
* [ARROW-11240](https://issues.apache.org/jira/browse/ARROW-11240) - [Packaging][R] Add mimalloc to R packaging
* [ARROW-11242](https://issues.apache.org/jira/browse/ARROW-11242) - [CI] Remove CMake 3.2 job
* [ARROW-11245](https://issues.apache.org/jira/browse/ARROW-11245) - [C++][Gandiva] Add support for LLVM 11.1
* [ARROW-11247](https://issues.apache.org/jira/browse/ARROW-11247) - [C++] Infer date32 columns in CSV
* [ARROW-11256](https://issues.apache.org/jira/browse/ARROW-11256) - [Packaging][Linux] Don't buffer packaging output
* [ARROW-11272](https://issues.apache.org/jira/browse/ARROW-11272) - [Release][wheel] Remove unsupported Python 3.5 and manylinux1
* [ARROW-11273](https://issues.apache.org/jira/browse/ARROW-11273) - [Release][deb] Remove unsupported Debian GNU/Linux stretch
* [ARROW-11278](https://issues.apache.org/jira/browse/ARROW-11278) - [Release][NodeJS] Don't touch \~/.bash\_profile
* [ARROW-11280](https://issues.apache.org/jira/browse/ARROW-11280) - [Release][APT] Fix minimal build example check
* [ARROW-11281](https://issues.apache.org/jira/browse/ARROW-11281) - [C++] Remove needless runtime RapidJSON dependency
* [ARROW-11282](https://issues.apache.org/jira/browse/ARROW-11282) - [Packaging][deb] Add missing libgflags-dev dependency
* [ARROW-11285](https://issues.apache.org/jira/browse/ARROW-11285) - [Release][APT] Add support for Ubuntu Groovy
* [ARROW-11292](https://issues.apache.org/jira/browse/ARROW-11292) - [Release][JS] Use Node.JS LTS
* [ARROW-11293](https://issues.apache.org/jira/browse/ARROW-11293) - [C++] Don't require Boost and gflags with find\_package(Arrow)
* [ARROW-11307](https://issues.apache.org/jira/browse/ARROW-11307) - [Release][Ubuntu][20.10] Add workaround for dependency issue
* [ARROW-11454](https://issues.apache.org/jira/browse/ARROW-11454) - [Website] [Rust] 3.0.0 Blog Post
* [PARQUET-1566](https://issues.apache.org/jira/browse/PARQUET-1566) - [C++] Indicate if null count, distinct count are present in column statistics


## Bug Fixes

* [ARROW-2616](https://issues.apache.org/jira/browse/ARROW-2616) - [Python] Cross-compiling Pyarrow
* [ARROW-6582](https://issues.apache.org/jira/browse/ARROW-6582) - [R] Arrow to R fails with embedded nuls in strings
* [ARROW-7363](https://issues.apache.org/jira/browse/ARROW-7363) - [Python] Add combine\_chunks method to ChunkedArray
* [ARROW-7909](https://issues.apache.org/jira/browse/ARROW-7909) - [Website] Add how to install on Red Hat Enterprise Linux
* [ARROW-8258](https://issues.apache.org/jira/browse/ARROW-8258) - [Rust] [Parquet] ArrowReader fails on some timestamp types
* [ARROW-9027](https://issues.apache.org/jira/browse/ARROW-9027) - [Python] Split in multiple files + clean-up pyarrow.parquet tests
* [ARROW-9479](https://issues.apache.org/jira/browse/ARROW-9479) - [JS] Table.from fails for zero-item Lists, FixedSizeLists, Maps. ditto Table.empty
* [ARROW-9636](https://issues.apache.org/jira/browse/ARROW-9636) - [Python] Update documentation about 'LZO' compression in parquet.write\_table
* [ARROW-9690](https://issues.apache.org/jira/browse/ARROW-9690) - [Go] tests failing on s390x
* [ARROW-9776](https://issues.apache.org/jira/browse/ARROW-9776) - [R] read\_feather causes segfault in R if file doesn't exist
* [ARROW-9897](https://issues.apache.org/jira/browse/ARROW-9897) - [C++][Gandiva] Add to\_date() function from pattern
* [ARROW-9897](https://issues.apache.org/jira/browse/ARROW-9897) - [C++][Gandiva] Add to\_date() function from pattern
* [ARROW-9898](https://issues.apache.org/jira/browse/ARROW-9898) - [C++][Gandiva] Error handling in castINT fails in some enviroments
* [ARROW-9903](https://issues.apache.org/jira/browse/ARROW-9903) - [R] open\_dataset freezes opening feather files on Windows
* [ARROW-9963](https://issues.apache.org/jira/browse/ARROW-9963) - [Python] Recognize datetime.timezone.utc as UTC on conversion python-\>pyarrow
* [ARROW-10039](https://issues.apache.org/jira/browse/ARROW-10039) - [Rust] Do not require memory alignment of buffers
* [ARROW-10042](https://issues.apache.org/jira/browse/ARROW-10042) - [Rust] Buffer equalities may be incorrect
* [ARROW-10080](https://issues.apache.org/jira/browse/ARROW-10080) - [R] Arrow does not release unused memory
* [ARROW-10122](https://issues.apache.org/jira/browse/ARROW-10122) - [Python] Selecting one column of multi-index results in a duplicated value column.
* [ARROW-10145](https://issues.apache.org/jira/browse/ARROW-10145) - [C++][Dataset] Assert integer overflow in partitioning falls back to string
* [ARROW-10146](https://issues.apache.org/jira/browse/ARROW-10146) - [Python] Parquet metadata to\_dict raises attribute error
* [ARROW-10174](https://issues.apache.org/jira/browse/ARROW-10174) - [Java] Reading of Dictionary encoded struct vector fails
* [ARROW-10177](https://issues.apache.org/jira/browse/ARROW-10177) - [CI][Gandiva] Nightly gandiva-jar-xenial fails
* [ARROW-10186](https://issues.apache.org/jira/browse/ARROW-10186) - [Rust] Tests fail when following instructions in README
* [ARROW-10247](https://issues.apache.org/jira/browse/ARROW-10247) - [C++][Dataset] Cannot write dataset with dictionary column as partition field
* [ARROW-10264](https://issues.apache.org/jira/browse/ARROW-10264) - [C++][Python] Parquet test failing with HadoopFileSystem URI
* [ARROW-10270](https://issues.apache.org/jira/browse/ARROW-10270) - [R] Fix CSV timestamp\_parsers test on R-devel
* [ARROW-10283](https://issues.apache.org/jira/browse/ARROW-10283) - [Python] Python deprecation warning for "PY\_SSIZE\_T\_CLEAN will be required for '\#' formats"
* [ARROW-10293](https://issues.apache.org/jira/browse/ARROW-10293) - [Rust] [DataFusion] Fix benchmarks
* [ARROW-10294](https://issues.apache.org/jira/browse/ARROW-10294) - [Java] Resolve problems of DecimalVector APIs on ArrowBufs
* [ARROW-10298](https://issues.apache.org/jira/browse/ARROW-10298) - [Rust] Incorrect offset handling in iterator over dictionary keys
* [ARROW-10321](https://issues.apache.org/jira/browse/ARROW-10321) - [C++] Building AVX512 code when we should not
* [ARROW-10333](https://issues.apache.org/jira/browse/ARROW-10333) - [Java] Remove split packages in arrow-memory-core and arrow-vectors
* [ARROW-10345](https://issues.apache.org/jira/browse/ARROW-10345) - [C++] NaN breaks sorting
* [ARROW-10346](https://issues.apache.org/jira/browse/ARROW-10346) - [Python] Default S3 region is eu-central-1 even with LANG=C
* [ARROW-10348](https://issues.apache.org/jira/browse/ARROW-10348) - [C++] Fix crash on invalid Parquet file (OSS-Fuzz)
* [ARROW-10350](https://issues.apache.org/jira/browse/ARROW-10350) - [Rust] parquet\_derive crate cannot be published to crates.io
* [ARROW-10353](https://issues.apache.org/jira/browse/ARROW-10353) - [C++] Parquet decompresses DataPageV2 pages even if is\_compressed==0
* [ARROW-10358](https://issues.apache.org/jira/browse/ARROW-10358) - [R] Followups to 2.0.0 release
* [ARROW-10365](https://issues.apache.org/jira/browse/ARROW-10365) - [R] Remove duplicate setting of S3 flag on macOS
* [ARROW-10369](https://issues.apache.org/jira/browse/ARROW-10369) - [Dev] Fix archery release utility test cases
* [ARROW-10371](https://issues.apache.org/jira/browse/ARROW-10371) - [R] Linux system requirements check needs to support older cmake versions
* [ARROW-10386](https://issues.apache.org/jira/browse/ARROW-10386) - [R] List column class attributes not preserved in roundtrip
* [ARROW-10388](https://issues.apache.org/jira/browse/ARROW-10388) - [Java] Fix Spark integration build failure
* [ARROW-10390](https://issues.apache.org/jira/browse/ARROW-10390) - [Rust] [Parquet] Regression Can not implement custom ParquetWriter because \`TryClone\` is not publically exported
* [ARROW-10393](https://issues.apache.org/jira/browse/ARROW-10393) - [Rust]: Fix null value reading in jsonreader for both dictionary and stringbuilders
* [ARROW-10394](https://issues.apache.org/jira/browse/ARROW-10394) - [Rust] [Large]BinaryArray can be created from non-binary datatypes
* [ARROW-10397](https://issues.apache.org/jira/browse/ARROW-10397) - [C++] Outdated and confusing comment on dictionary indices
* [ARROW-10399](https://issues.apache.org/jira/browse/ARROW-10399) - [R] Fix performance regression from cpp11::r\_string
* [ARROW-10411](https://issues.apache.org/jira/browse/ARROW-10411) - [C++] Fix incorrect child array lengths for Concatenate of FixedSizeList
* [ARROW-10412](https://issues.apache.org/jira/browse/ARROW-10412) - [C++] CMake Build Fails with grpc 1.33.1, "GRPC\_CPP\_PLUGIN-NOTFOUND: program not found or is not executable"
* [ARROW-10413](https://issues.apache.org/jira/browse/ARROW-10413) - [Rust] [Parquet] Unignore some roundtrip tests that are passing now
* [ARROW-10414](https://issues.apache.org/jira/browse/ARROW-10414) - [R] open\_dataset doesn't work with absolute/expanded paths on Windows
* [ARROW-10426](https://issues.apache.org/jira/browse/ARROW-10426) - [C++] Arrow type large\_string cannot be written to Parquet type column descriptor
* [ARROW-10433](https://issues.apache.org/jira/browse/ARROW-10433) - [Python] pyarrow doesn't work with s3fs\>=0.5
* [ARROW-10434](https://issues.apache.org/jira/browse/ARROW-10434) - [Rust] Debug formatting arrays with lengths greater than 10 and less than 20 produces incorrect values
* [ARROW-10441](https://issues.apache.org/jira/browse/ARROW-10441) - [FlightRPC][Java] FlightClients from FlightGrpcUtils\#createFlightClient shutdown gRPC channel when closed
* [ARROW-10446](https://issues.apache.org/jira/browse/ARROW-10446) - [C++][Python] Timezone aware pd.Timestamp's are incorrectly converted to Timestamp arrys
* [ARROW-10448](https://issues.apache.org/jira/browse/ARROW-10448) - [Rust] PrimitiveArray::new can create arrays not in spec
* [ARROW-10453](https://issues.apache.org/jira/browse/ARROW-10453) - [Rust] [DataFusion] Performance degredation after removing specialization
* [ARROW-10461](https://issues.apache.org/jira/browse/ARROW-10461) - [Rust] Offset related bug in BitChunks::remainder\_bits
* [ARROW-10462](https://issues.apache.org/jira/browse/ARROW-10462) - [Python] ParquetDatasetPiece's path broken when using fsspec fs on Windows
* [ARROW-10463](https://issues.apache.org/jira/browse/ARROW-10463) - [R] Better messaging for currently unsupported CSV options in open\_dataset
* [ARROW-10470](https://issues.apache.org/jira/browse/ARROW-10470) - [R] Fix missing file error causing NYC taxi example to fail
* [ARROW-10471](https://issues.apache.org/jira/browse/ARROW-10471) - [CI][Python] Ensure we have tests with s3fs and run those on CI
* [ARROW-10472](https://issues.apache.org/jira/browse/ARROW-10472) - [C++][Python] casting a scalar timestamp to date32 results in Aborted (core dump)
* [ARROW-10475](https://issues.apache.org/jira/browse/ARROW-10475) - [С++][FlightRPC] Arrow Flight Server / Client cannot be initialized with Ipv6 host
* [ARROW-10480](https://issues.apache.org/jira/browse/ARROW-10480) - [Python] Parquet write\_table creates gzipped Parquet file, not Parquet with gzip compression
* [ARROW-10482](https://issues.apache.org/jira/browse/ARROW-10482) - [Python] Specifying compression type on a column basis when writing Parquet not working
* [ARROW-10491](https://issues.apache.org/jira/browse/ARROW-10491) - [FlightRPC][Java] Fix NPE when using FlightProducer without interceptors
* [ARROW-10493](https://issues.apache.org/jira/browse/ARROW-10493) - [C++][Parquet] Writing nullable nested strings results in wrong data in file
* [ARROW-10495](https://issues.apache.org/jira/browse/ARROW-10495) - [C++] find\_package(Arrow) is broken on Ubuntu 18
* [ARROW-10496](https://issues.apache.org/jira/browse/ARROW-10496) - [R][CI] Fix conda-r job
* [ARROW-10499](https://issues.apache.org/jira/browse/ARROW-10499) - [C++][Java] Fix ORC Java JNI Crash
* [ARROW-10502](https://issues.apache.org/jira/browse/ARROW-10502) - [C++/Python] CUDA detection messes up nightly conda-win builds
* [ARROW-10503](https://issues.apache.org/jira/browse/ARROW-10503) - [C++] Uriparser will not compile using Intel compiler
* [ARROW-10508](https://issues.apache.org/jira/browse/ARROW-10508) - [Java] Allow FixedSizeListVector to have empty children
* [ARROW-10509](https://issues.apache.org/jira/browse/ARROW-10509) - [C++] Define operator<<(ostream, ParquetException) for clang+Windows
* [ARROW-10511](https://issues.apache.org/jira/browse/ARROW-10511) - [Python] Table.to\_pandas() failing when timezone-awareness mismatch in metadata
* [ARROW-10518](https://issues.apache.org/jira/browse/ARROW-10518) - Fix cast function issues in gandiva
* [ARROW-10519](https://issues.apache.org/jira/browse/ARROW-10519) - [Python] Deadlock when PyArrow imports Pandas from multiple threads
* [ARROW-10525](https://issues.apache.org/jira/browse/ARROW-10525) - [C++] Fix crash on unsupported IPC stream (OSS-Fuzz)
* [ARROW-10532](https://issues.apache.org/jira/browse/ARROW-10532) - [Python] Mangled pandas\_metadata when specified schema has different order as DataFrame columns
* [ARROW-10545](https://issues.apache.org/jira/browse/ARROW-10545) - [C++] Fix crash on invalid Parquet file (OSS-Fuzz)
* [ARROW-10546](https://issues.apache.org/jira/browse/ARROW-10546) - [Python] Deprecate the S3FSWrapper class
* [ARROW-10547](https://issues.apache.org/jira/browse/ARROW-10547) - [Rust][DataFusion] Filter pushdown loses filters if below a user defined node
* [ARROW-10551](https://issues.apache.org/jira/browse/ARROW-10551) - [Rust]: Fix unreproducible benchmarks
* [ARROW-10558](https://issues.apache.org/jira/browse/ARROW-10558) - [Python] Filesystem S3 tests not independent (native s3 influences s3fs)
* [ARROW-10560](https://issues.apache.org/jira/browse/ARROW-10560) - [Python] Crash when creating array with string over 2GB
* [ARROW-10563](https://issues.apache.org/jira/browse/ARROW-10563) - [Packaging][C++] CMake find\_package(Arrow 2.0 CONFIG REQUIRED) broken
* [ARROW-10565](https://issues.apache.org/jira/browse/ARROW-10565) - [Python] Table.from\_batches and Table.from\_pandas have argument Schema\_schema in documentation instead of schema
* [ARROW-10568](https://issues.apache.org/jira/browse/ARROW-10568) - [C++][Parquet] Parquet writer crashes process when Tell() does not succeed
* [ARROW-10569](https://issues.apache.org/jira/browse/ARROW-10569) - [C++][Python] Poor Table filtering performance
* [ARROW-10577](https://issues.apache.org/jira/browse/ARROW-10577) - [Rust][DataFusion] Hash Aggregator stream finishes unexpectedly after going to Pending state
* [ARROW-10578](https://issues.apache.org/jira/browse/ARROW-10578) - [C++] Comparison kernels crashing for string array with null string scalar
* [ARROW-10610](https://issues.apache.org/jira/browse/ARROW-10610) - [C++] arrow-utility-test and arrow-csv-test causes failures on a big-endian platform
* [ARROW-10616](https://issues.apache.org/jira/browse/ARROW-10616) - [Developer] Expand PR labeler to all supported languages
* [ARROW-10617](https://issues.apache.org/jira/browse/ARROW-10617) - [Python] RecordBatchStreamReader's iterator doesn't work with python 3.8
* [ARROW-10619](https://issues.apache.org/jira/browse/ARROW-10619) - [C++] Fix crash on unsupported IPC stream (OSS-Fuzz)
* [ARROW-10620](https://issues.apache.org/jira/browse/ARROW-10620) - [Rust][Parquet] move column chunk range logic to metadata.rs
* [ARROW-10621](https://issues.apache.org/jira/browse/ARROW-10621) - [Java] flight-cpre test causes a failure on s390x
* [ARROW-10622](https://issues.apache.org/jira/browse/ARROW-10622) - [R] Nameof<\>() is incorrect in r-arrow build environment
* [ARROW-10623](https://issues.apache.org/jira/browse/ARROW-10623) - [R] Version 1.0.1 breaks data.frame attributes when reading file written by 2.0.0
* [ARROW-10624](https://issues.apache.org/jira/browse/ARROW-10624) - [R] Proactively remove "problems" attributes
* [ARROW-10627](https://issues.apache.org/jira/browse/ARROW-10627) - [Rust] Github master does not compile for WASM target
* [ARROW-10629](https://issues.apache.org/jira/browse/ARROW-10629) - [CI] MinGW builds broken on Github Actions
* [ARROW-10631](https://issues.apache.org/jira/browse/ARROW-10631) - [Rust] Equality of fixed-sized binary is incorrect.
* [ARROW-10642](https://issues.apache.org/jira/browse/ARROW-10642) - [R] Can't get Table from RecordBatchReader with 0 batches
* [ARROW-10656](https://issues.apache.org/jira/browse/ARROW-10656) - [Rust] New RecordBatch requires exact match of Data Types
* [ARROW-10656](https://issues.apache.org/jira/browse/ARROW-10656) - [Rust] New RecordBatch requires exact match of Data Types
* [ARROW-10661](https://issues.apache.org/jira/browse/ARROW-10661) - [C\#] Fix benchmarking project
* [ARROW-10662](https://issues.apache.org/jira/browse/ARROW-10662) - [Java] Avoid integer overflow for Json file reader
* [ARROW-10663](https://issues.apache.org/jira/browse/ARROW-10663) - [C++/Doc] The IsIn kernel ignores the skip\_nulls option of SetLookupOptions
* [ARROW-10667](https://issues.apache.org/jira/browse/ARROW-10667) - [Rust] [Parquet] Add a convenience type for writing Parquet to memory
* [ARROW-10668](https://issues.apache.org/jira/browse/ARROW-10668) - [R] Filtering does not work with .data pronoun
* [ARROW-10681](https://issues.apache.org/jira/browse/ARROW-10681) - [Rust] [DataFusion] TPC-H Query 12 fails with scheduler error
* [ARROW-10684](https://issues.apache.org/jira/browse/ARROW-10684) - [Rust] Logical equality should consider parent array nullability
* [ARROW-10690](https://issues.apache.org/jira/browse/ARROW-10690) - [Java] ComplexCopier gives incorrect result for list vector if target vector is non-empty
* [ARROW-10692](https://issues.apache.org/jira/browse/ARROW-10692) - [Rust] Segfault while array buffer append
* [ARROW-10694](https://issues.apache.org/jira/browse/ARROW-10694) - [Python] ds.write\_dataset() generates empty files for each final partition
* [ARROW-10699](https://issues.apache.org/jira/browse/ARROW-10699) - [C++] BitmapUInt64Reader doesn't work on big-endian
* [ARROW-10701](https://issues.apache.org/jira/browse/ARROW-10701) - [Rust] [Datafusion] Benchmark sort\_limit\_query\_sql fails because order by clause specifies column index instead of expression
* [ARROW-10705](https://issues.apache.org/jira/browse/ARROW-10705) - [Rust] Lifetime annotations in the IPC writer are too strict, preventing code reuse
* [ARROW-10710](https://issues.apache.org/jira/browse/ARROW-10710) - [Rust] Example flight server is broken after tokio upgrade (among other things)
* [ARROW-10711](https://issues.apache.org/jira/browse/ARROW-10711) - [CI] Remove set-env from auto-tune to work with new GHA settings
* [ARROW-10719](https://issues.apache.org/jira/browse/ARROW-10719) - [C\#] ArrowStreamWriter doesn't write schema metadata
* [ARROW-10746](https://issues.apache.org/jira/browse/ARROW-10746) - [C++] Use GTEST\_SKIP in parquet encoding tests
* [ARROW-10748](https://issues.apache.org/jira/browse/ARROW-10748) - [Java] TimeStampMilliVector cannot be cast to TimeStampMilliTZVector
* [ARROW-10749](https://issues.apache.org/jira/browse/ARROW-10749) - [C++] Incorrect string format for Datum with the collection type
* [ARROW-10751](https://issues.apache.org/jira/browse/ARROW-10751) - [C++] Add RE2 to minimal build example
* [ARROW-10753](https://issues.apache.org/jira/browse/ARROW-10753) - [Rust] [DataFusion] Negative numbers in SQL WHERE clause not parsed correctly
* [ARROW-10757](https://issues.apache.org/jira/browse/ARROW-10757) - [Rust] [CI] Sporadic failures due to disk filling up
* [ARROW-10760](https://issues.apache.org/jira/browse/ARROW-10760) - [Rust] [DataFusion] Predicate push down does not support joins correctly
* [ARROW-10769](https://issues.apache.org/jira/browse/ARROW-10769) - [CI] Integration tests are failing in master
* [ARROW-10774](https://issues.apache.org/jira/browse/ARROW-10774) - [R] Set minimum cpp11 version
* [ARROW-10777](https://issues.apache.org/jira/browse/ARROW-10777) - [Packaging][Python] PyPI pyarrow source dist (sdist) contains architecture dependent binaries
* [ARROW-10778](https://issues.apache.org/jira/browse/ARROW-10778) - [Python] RowGroupInfo.statistics errors for empty row group
* [ARROW-10779](https://issues.apache.org/jira/browse/ARROW-10779) - [Java] writeNull method in UnionListWriter doesn't work correctly if validity at that index is already set
* [ARROW-10780](https://issues.apache.org/jira/browse/ARROW-10780) - [R] Update known R installation issues for CentOS 7
* [ARROW-10791](https://issues.apache.org/jira/browse/ARROW-10791) - [Rust] StreamReader, read\_dictionary duplicating schema info
* [ARROW-10801](https://issues.apache.org/jira/browse/ARROW-10801) - [Rust] [Flight] Support sending FlightData for Dictionaries with that of a RecordBatch
* [ARROW-10803](https://issues.apache.org/jira/browse/ARROW-10803) - [R] Support R \>= 3.3 and add CI
* [ARROW-10804](https://issues.apache.org/jira/browse/ARROW-10804) - [Rust] Remove UB on parquet crate
* [ARROW-10807](https://issues.apache.org/jira/browse/ARROW-10807) - [Rust][DataFusion] Avoid double hashing
* [ARROW-10810](https://issues.apache.org/jira/browse/ARROW-10810) - [Rust] Speed up comparison kernels
* [ARROW-10811](https://issues.apache.org/jira/browse/ARROW-10811) - [R][CI] Remove nightly centos6 build
* [ARROW-10823](https://issues.apache.org/jira/browse/ARROW-10823) - MutableArrayData with use\_null false yields wrong results
* [ARROW-10830](https://issues.apache.org/jira/browse/ARROW-10830) - [Rust] json reader should not hard crash on invalid json
* [ARROW-10833](https://issues.apache.org/jira/browse/ARROW-10833) - [Python] Avoid usage of NumPy's PyArray\_DescrCheck macro
* [ARROW-10834](https://issues.apache.org/jira/browse/ARROW-10834) - [R] Fix print method for SubTreeFileSystem
* [ARROW-10837](https://issues.apache.org/jira/browse/ARROW-10837) - [Rust] Use \`Vec<u8\>\` for hash key instead
* [ARROW-10840](https://issues.apache.org/jira/browse/ARROW-10840) - [C++] Parquet FileMetaData does not have key\_value\_metadata when built from FileMetaDataBuilder
* [ARROW-10842](https://issues.apache.org/jira/browse/ARROW-10842) - [Rust] decouple IO from json schema inference code
* [ARROW-10844](https://issues.apache.org/jira/browse/ARROW-10844) - [Rust] [DataFusion] join of two DataFrames is not possible
* [ARROW-10850](https://issues.apache.org/jira/browse/ARROW-10850) - [R] Unrecognized compression type: LZ4
* [ARROW-10852](https://issues.apache.org/jira/browse/ARROW-10852) - [C++] AssertTablesEqual(verbose=true) segfaults if the left array has more rows
* [ARROW-10854](https://issues.apache.org/jira/browse/ARROW-10854) - [Rust] [DataFusion] Simplified logical scans
* [ARROW-10855](https://issues.apache.org/jira/browse/ARROW-10855) - [Python][Numpy] ArrowTypeError after upgrading NumPy to 1.20.0rc1
* [ARROW-10856](https://issues.apache.org/jira/browse/ARROW-10856) - [R] CentOS 7 not correctly identifying compiler version
* [ARROW-10859](https://issues.apache.org/jira/browse/ARROW-10859) - [Rust] [DataFusion] Make collect not require ExecutionContext
* [ARROW-10860](https://issues.apache.org/jira/browse/ARROW-10860) - [Java] Avoid integer overflow for generated classes in Vector
* [ARROW-10863](https://issues.apache.org/jira/browse/ARROW-10863) - [Python] ExtensionArray.to\_pandas not working
* [ARROW-10863](https://issues.apache.org/jira/browse/ARROW-10863) - [Python] ExtensionArray.to\_pandas not working
* [ARROW-10875](https://issues.apache.org/jira/browse/ARROW-10875) - simplify simd cfg check
* [ARROW-10876](https://issues.apache.org/jira/browse/ARROW-10876) - [Rust] json reader should validate value type
* [ARROW-10897](https://issues.apache.org/jira/browse/ARROW-10897) - [Rust] Replace Arc<String\> by String in DataType::Timestamp
* [ARROW-10907](https://issues.apache.org/jira/browse/ARROW-10907) - [Rust] Cast UTF8 to Date64 Incorrect
* [ARROW-10913](https://issues.apache.org/jira/browse/ARROW-10913) - [Python][Doc] Code block typo in filesystems docs
* [ARROW-10914](https://issues.apache.org/jira/browse/ARROW-10914) - [Rust]: SIMD implementation of arithmetic kernels reads out of bounds
* [ARROW-10915](https://issues.apache.org/jira/browse/ARROW-10915) - [Rust] Make ARROW\_TEST\_DATA and PARQUET\_TEST\_DATA absolute dirs
* [ARROW-10921](https://issues.apache.org/jira/browse/ARROW-10921) - \`TypeError: 'coroutine' object is not iterable\` when reading parquet partitions via s3fs \>= 0.5 with pyarrow
* [ARROW-10930](https://issues.apache.org/jira/browse/ARROW-10930) - [Python] LargeListType doesn't have a value\_field
* [ARROW-10932](https://issues.apache.org/jira/browse/ARROW-10932) - [C++] BinaryMemoTable::CopyOffsets access out-of-bound address when data is empty
* [ARROW-10932](https://issues.apache.org/jira/browse/ARROW-10932) - [C++] BinaryMemoTable::CopyOffsets access out-of-bound address when data is empty
* [ARROW-10942](https://issues.apache.org/jira/browse/ARROW-10942) - [C++] S3FileSystem::Impl::IsEmptyDirectory fails on Amazon S3
* [ARROW-10943](https://issues.apache.org/jira/browse/ARROW-10943) - [Rust] Intermittent build failure in parquet encoding
* [ARROW-10954](https://issues.apache.org/jira/browse/ARROW-10954) - [C++][Doc] PlasmaClient is threadSafe now, doc not update
* [ARROW-10955](https://issues.apache.org/jira/browse/ARROW-10955) - [C++] Reading empty json lists results in invalid non-nullable null type
* [ARROW-10960](https://issues.apache.org/jira/browse/ARROW-10960) - [C++][FlightRPC] Missing protobuf data\_body should result in default value of empty bytes, not null
* [ARROW-10962](https://issues.apache.org/jira/browse/ARROW-10962) - [Java][FlightRPC] FlightData deserializer should accept missing fields
* [ARROW-10967](https://issues.apache.org/jira/browse/ARROW-10967) - [Rust] Make env vars ARROW\_TEST\_DATA and PARQUET\_TEST\_DATA optional
* [ARROW-10990](https://issues.apache.org/jira/browse/ARROW-10990) - [Rust]: SIMD implementation of compare kernels reads out of bounds
* [ARROW-10994](https://issues.apache.org/jira/browse/ARROW-10994) - [Rust] Fix bugs in TPC-H file conversion
* [ARROW-10996](https://issues.apache.org/jira/browse/ARROW-10996) - [Rust] Return error messages via Result for get\_arrow\_schema\_from\_metadata
* [ARROW-10999](https://issues.apache.org/jira/browse/ARROW-10999) - [Rust] TPC-H parquet files cannot be read by Apache Spark
* [ARROW-11014](https://issues.apache.org/jira/browse/ARROW-11014) - [Rust] [DataFusion] ParquetExec reports incorrect statistics
* [ARROW-11023](https://issues.apache.org/jira/browse/ARROW-11023) - [C++][CMake] gRPC doesn't respect CMAKE\_CXX\_COMPILER
* [ARROW-11024](https://issues.apache.org/jira/browse/ARROW-11024) - [C++][Parquet] Writing List<Struct\> to parquet sometimes writes wrong data
* [ARROW-11025](https://issues.apache.org/jira/browse/ARROW-11025) - [Rust] Bench for boolean kernels measure array creation
* [ARROW-11030](https://issues.apache.org/jira/browse/ARROW-11030) - [Rust] [DataFusion] HashJoinExec slow with many batches
* [ARROW-11048](https://issues.apache.org/jira/browse/ARROW-11048) - [Rust] Add bench to MutableBuffer
* [ARROW-11050](https://issues.apache.org/jira/browse/ARROW-11050) - [R] Handle RecordBatch in write\_parquet
* [ARROW-11067](https://issues.apache.org/jira/browse/ARROW-11067) - [C++] CSV reader returns nulls for some strings on macOS
* [ARROW-11069](https://issues.apache.org/jira/browse/ARROW-11069) - [C++] Parquet writer incorrect data being written when data type is struct
* [ARROW-11073](https://issues.apache.org/jira/browse/ARROW-11073) - [Rust] Lint Error on CI Tests in /arrow/rust/arrow/src/ipc/reader.rs
* [ARROW-11083](https://issues.apache.org/jira/browse/ARROW-11083) - [CI] Build "Source Release and Merge Script" is broken
* [ARROW-11084](https://issues.apache.org/jira/browse/ARROW-11084) - [Rust] Clippy failing in master
* [ARROW-11085](https://issues.apache.org/jira/browse/ARROW-11085) - [Rust] Rust CI no longer works b/c it uses action-rs: Migrate CI away from action-rs/\*
* [ARROW-11092](https://issues.apache.org/jira/browse/ARROW-11092) - [CI] (Temporarily) move offending workflows to separate files
* [ARROW-11102](https://issues.apache.org/jira/browse/ARROW-11102) - [Rust][DataFusion] fmt::Debug for ScalarValue(Utf8) is always quoted
* [ARROW-11113](https://issues.apache.org/jira/browse/ARROW-11113) - [Rust] support as\_struct\_array cast
* [ARROW-11114](https://issues.apache.org/jira/browse/ARROW-11114) - [Java] Metadata serialization is broken for Field class
* [ARROW-11132](https://issues.apache.org/jira/browse/ARROW-11132) - [CI] Use pip to install crossbow's dependencies for the comment bot
* [ARROW-11144](https://issues.apache.org/jira/browse/ARROW-11144) - [C++][Python][CI] Fix HDFS nightly build
* [ARROW-11152](https://issues.apache.org/jira/browse/ARROW-11152) - [CI][C++] Fix Homebrew numpy installation on macOS builds
* [ARROW-11162](https://issues.apache.org/jira/browse/ARROW-11162) - [C++] Fix crash on Decimal256 Parquet file (OSS-Fuzz)
* [ARROW-11163](https://issues.apache.org/jira/browse/ARROW-11163) - [C++][Python] Compressed Feather file written with pyarrow 0.17 not readable in pyarrow 2.0.0+
* [ARROW-11166](https://issues.apache.org/jira/browse/ARROW-11166) - [Python][Compute] Add bindings for ProjectOptions
* [ARROW-11171](https://issues.apache.org/jira/browse/ARROW-11171) - [Go] Build fails on s390x with noasm tag
* [ARROW-11189](https://issues.apache.org/jira/browse/ARROW-11189) - [Developer] Achery benchmark diff cannot compare two jsons
* [ARROW-11190](https://issues.apache.org/jira/browse/ARROW-11190) - [C++][Dataset] Clean up compiler warnings
* [ARROW-11202](https://issues.apache.org/jira/browse/ARROW-11202) - [R][CI] Nightly builds not happening (or artifacts not exported)
* [ARROW-11224](https://issues.apache.org/jira/browse/ARROW-11224) - [R] don't test metadata serialization on old R versions
* [ARROW-11226](https://issues.apache.org/jira/browse/ARROW-11226) - [Python][CI] Filesystem tests failing with s3fs 0.5.2
* [ARROW-11227](https://issues.apache.org/jira/browse/ARROW-11227) - [Python][CI]  AMD64 Conda Python 3.7 Pandas 0.24  cron job failing in to\_pandas extension dtype test
* [ARROW-11229](https://issues.apache.org/jira/browse/ARROW-11229) - [C++][Dataset] Static build is failed
* [ARROW-11230](https://issues.apache.org/jira/browse/ARROW-11230) - [R] Fix build failures on Windows when multiple libarrow binaries found
* [ARROW-11232](https://issues.apache.org/jira/browse/ARROW-11232) - [C++] Table::CombineChunks() returns incorrect results if Table has no column
* [ARROW-11233](https://issues.apache.org/jira/browse/ARROW-11233) - [C++][Flight] Fail to link with bundled gRPC and Abseil
* [ARROW-11237](https://issues.apache.org/jira/browse/ARROW-11237) - [C++] Compiler error with GLog and unity build enabled
* [ARROW-11250](https://issues.apache.org/jira/browse/ARROW-11250) - [Python] Inconsistent behavior calling ds.dataset()
* [ARROW-11251](https://issues.apache.org/jira/browse/ARROW-11251) - [CI] Make sure that devtoolset-8 is really installed + being used
* [ARROW-11253](https://issues.apache.org/jira/browse/ARROW-11253) - [R] Make sure that large metadata tests are reproducible
* [ARROW-11255](https://issues.apache.org/jira/browse/ARROW-11255) - [Packaging][Conda][macOS] Fix Python version
* [ARROW-11257](https://issues.apache.org/jira/browse/ARROW-11257) - [C++][Parquet] PyArrow Table contains different data after writing and reloading from Parquet
* [ARROW-11271](https://issues.apache.org/jira/browse/ARROW-11271) - [Rust] [Parquet] List schema to Arrow parser misinterpreting child nullability
* [ARROW-11274](https://issues.apache.org/jira/browse/ARROW-11274) - [Packaging][wheel][Windows] Fix wheels path for Gemfury
* [ARROW-11275](https://issues.apache.org/jira/browse/ARROW-11275) - [Packaging][wheel][Linux] Fix paths for Gemfury
* [ARROW-11283](https://issues.apache.org/jira/browse/ARROW-11283) - [Julia] Fix install link
* [ARROW-11286](https://issues.apache.org/jira/browse/ARROW-11286) - [Release][Yum] Fix minimal build example check
* [ARROW-11287](https://issues.apache.org/jira/browse/ARROW-11287) - [Packaging][RPM] Add missing dependencies
* [ARROW-11301](https://issues.apache.org/jira/browse/ARROW-11301) - [C++] Fix reading LZ4-compressed Parquet files produced by Java Parquet implementation
* [ARROW-11302](https://issues.apache.org/jira/browse/ARROW-11302) - [Release][Python] Remove verification of python 3.5 wheel on macOS
* [ARROW-11306](https://issues.apache.org/jira/browse/ARROW-11306) - [Packaging][Ubuntu][16.04] Add missing libprotobuf-dev dependency
* [ARROW-11363](https://issues.apache.org/jira/browse/ARROW-11363) - C++ Library Build Failure with gRPC 1.34+
* [ARROW-11390](https://issues.apache.org/jira/browse/ARROW-11390) - [Python] pyarrow 3.0 issues with turbodbc
* [ARROW-11445](https://issues.apache.org/jira/browse/ARROW-11445) - Type conversion failure on numpy 0.1.20
* [ARROW-11450](https://issues.apache.org/jira/browse/ARROW-11450) - [Python] pyarrow<3 incompatible with numpy\>=1.20.0
* [ARROW-11487](https://issues.apache.org/jira/browse/ARROW-11487) - [Python] Can't create array from Categorical with numpy 1.20
* [ARROW-11835](https://issues.apache.org/jira/browse/ARROW-11835) - [Python] PyArrow 3.0/Pip installation errors on Big Sur.
* [ARROW-12399](https://issues.apache.org/jira/browse/ARROW-12399) - Unable to load libhdfs
* [PARQUET-1935](https://issues.apache.org/jira/browse/PARQUET-1935) - [C++][Parquet] nullptr access violation when writing arrays of non-nullable values



# Apache Arrow 2.0.0 (2020-10-19)

## Bug Fixes

* [ARROW-2367](https://issues.apache.org/jira/browse/ARROW-2367) - [Python] ListArray has trouble with sizes greater than kMaximumCapacity
* [ARROW-4189](https://issues.apache.org/jira/browse/ARROW-4189) - [CI] [Rust] Fix broken cargo coverage
* [ARROW-4917](https://issues.apache.org/jira/browse/ARROW-4917) - [C++] orc\_ep fails in cpp-alpine docker
* [ARROW-5578](https://issues.apache.org/jira/browse/ARROW-5578) - [C++][Flight] Flight does not build out of the box on Alpine Linux
* [ARROW-7226](https://issues.apache.org/jira/browse/ARROW-7226) - [JSON][Python] Json loader fails on example in documentation.
* [ARROW-7384](https://issues.apache.org/jira/browse/ARROW-7384) - [Website] Fix search indexing warning reported by Google
* [ARROW-7517](https://issues.apache.org/jira/browse/ARROW-7517) - [C++] Builder does not honour dictionary type provided during initialization
* [ARROW-7663](https://issues.apache.org/jira/browse/ARROW-7663) - [Python] from\_pandas gives TypeError instead of ArrowTypeError in some cases
* [ARROW-7903](https://issues.apache.org/jira/browse/ARROW-7903) - [Rust] [DataFusion] Upgrade SQLParser dependency for DataFusion
* [ARROW-7957](https://issues.apache.org/jira/browse/ARROW-7957) - [Python] ParquetDataset cannot take HadoopFileSystem as filesystem
* [ARROW-8265](https://issues.apache.org/jira/browse/ARROW-8265) - [Rust] [DataFusion] Table API collect() should not require context
* [ARROW-8394](https://issues.apache.org/jira/browse/ARROW-8394) - [JS] Typescript compiler errors for arrow d.ts files, when using es2015-esm package
* [ARROW-8735](https://issues.apache.org/jira/browse/ARROW-8735) - [Rust] [Parquet] Parquet crate fails to compile on Arm architecture
* [ARROW-8749](https://issues.apache.org/jira/browse/ARROW-8749) - [C++] IpcFormatWriter writes dictionary batches with wrong ID
* [ARROW-8773](https://issues.apache.org/jira/browse/ARROW-8773) - [Python] pyarrow schema.empty\_table() does not preserve nullability of fields
* [ARROW-9028](https://issues.apache.org/jira/browse/ARROW-9028) - [R] Should be able to convert an empty table
* [ARROW-9096](https://issues.apache.org/jira/browse/ARROW-9096) - [Python] Pandas roundtrip with object-dtype column labels with integer values: data type "integer" not understood
* [ARROW-9177](https://issues.apache.org/jira/browse/ARROW-9177) - [C++][Parquet] Tracking issue for cross-implementation LZ4 Parquet compression compatibility
* [ARROW-9414](https://issues.apache.org/jira/browse/ARROW-9414) - [C++] apt package includes headers for S3 interface, but no support
* [ARROW-9462](https://issues.apache.org/jira/browse/ARROW-9462) - [Go] The Indentation after the first Record arrjson writer is missing
* [ARROW-9463](https://issues.apache.org/jira/browse/ARROW-9463) - [Go] The writer is double closed in TestReadWrite
* [ARROW-9490](https://issues.apache.org/jira/browse/ARROW-9490) - [Python] pyarrow array creation for specific set of numpy scalars fails
* [ARROW-9495](https://issues.apache.org/jira/browse/ARROW-9495) - [C++] Equality assertions don't handle Inf /  -Inf properly
* [ARROW-9520](https://issues.apache.org/jira/browse/ARROW-9520) - [Rust] [DataFusion] Can't alias an aggregate expression
* [ARROW-9528](https://issues.apache.org/jira/browse/ARROW-9528) - [Python] Honor tzinfo information when converting from datetime to pyarrow
* [ARROW-9532](https://issues.apache.org/jira/browse/ARROW-9532) - [Python] Building pyarrow for MacPorts on macOS
* [ARROW-9535](https://issues.apache.org/jira/browse/ARROW-9535) - [Python] Remove symlink fixes from conda recipe
* [ARROW-9536](https://issues.apache.org/jira/browse/ARROW-9536) - Missing parameters in PlasmaOutOfMemoryException.java
* [ARROW-9541](https://issues.apache.org/jira/browse/ARROW-9541) - [C++] CMakeLists requires UTF8PROC\_STATIC when building static library
* [ARROW-9544](https://issues.apache.org/jira/browse/ARROW-9544) - [R] version argument of write\_parquet not working
* [ARROW-9546](https://issues.apache.org/jira/browse/ARROW-9546) - [Python] Clean up Pandas Metadata Conversion test
* [ARROW-9548](https://issues.apache.org/jira/browse/ARROW-9548) - [Go] Test output files in tmp directory are not removed correctly
* [ARROW-9549](https://issues.apache.org/jira/browse/ARROW-9549) - [Rust] Parquet no longer builds
* [ARROW-9554](https://issues.apache.org/jira/browse/ARROW-9554) - [Java] FixedWidthInPlaceVectorSorter sometimes produces wrong result
* [ARROW-9556](https://issues.apache.org/jira/browse/ARROW-9556) - [Python][C++] Segfaults in UnionArray with null values
* [ARROW-9560](https://issues.apache.org/jira/browse/ARROW-9560) - [Packaging] conda recipes failing due to missing conda-forge.yml
* [ARROW-9569](https://issues.apache.org/jira/browse/ARROW-9569) - [CI][R] Fix rtools35 builds for msys2 key change
* [ARROW-9570](https://issues.apache.org/jira/browse/ARROW-9570) - [Doc] Clean up sphinx sidebar
* [ARROW-9573](https://issues.apache.org/jira/browse/ARROW-9573) - [Python] Parquet doesn't load when partitioned column starts with '\_'
* [ARROW-9574](https://issues.apache.org/jira/browse/ARROW-9574) - [R] Cleanups for CRAN 1.0.0 release
* [ARROW-9575](https://issues.apache.org/jira/browse/ARROW-9575) - [R] gcc-UBSAN failure on CRAN
* [ARROW-9577](https://issues.apache.org/jira/browse/ARROW-9577) - [Python][C++] posix\_madvise error on Debian in pyarrow 1.0.0
* [ARROW-9583](https://issues.apache.org/jira/browse/ARROW-9583) - [Rust] Offset is mishandled in arithmetic and boolean compute kernels
* [ARROW-9588](https://issues.apache.org/jira/browse/ARROW-9588) - [C++] clang/win: Copy constructor of ParquetInvalidOrCorruptedFileException not correctly triggered
* [ARROW-9589](https://issues.apache.org/jira/browse/ARROW-9589) - [C++/R] arrow\_exports.h contains structs declared as class
* [ARROW-9592](https://issues.apache.org/jira/browse/ARROW-9592) - [CI] Update homebrew before calling brew bundle
* [ARROW-9596](https://issues.apache.org/jira/browse/ARROW-9596) - [CI][Crossbow] Fix homebrew-cpp again, again
* [ARROW-9597](https://issues.apache.org/jira/browse/ARROW-9597) - [C++] AddAlias in compute::FunctionRegistry should be synchronized
* [ARROW-9598](https://issues.apache.org/jira/browse/ARROW-9598) - [C++][Parquet]  Spaced definition levels is not assigned correctly.
* [ARROW-9599](https://issues.apache.org/jira/browse/ARROW-9599) - [CI] Appveyor toolchain build fails because CMake detects different C and C++ compilers
* [ARROW-9600](https://issues.apache.org/jira/browse/ARROW-9600) - [Rust] When used as a crate dependency, arrow-flight is rebuilt on every invocation of cargo build
* [ARROW-9600](https://issues.apache.org/jira/browse/ARROW-9600) - [Rust] When used as a crate dependency, arrow-flight is rebuilt on every invocation of cargo build
* [ARROW-9602](https://issues.apache.org/jira/browse/ARROW-9602) - [R] Improve cmake detection in Linux build
* [ARROW-9603](https://issues.apache.org/jira/browse/ARROW-9603) - [C++][Parquet] Write Arrow relies on unspecified behavior for nested types
* [ARROW-9606](https://issues.apache.org/jira/browse/ARROW-9606) - [C++][Dataset] in expressions don't work with \>1 partition levels
* [ARROW-9609](https://issues.apache.org/jira/browse/ARROW-9609) - [C++] CSV datasets don't materialize virtual columns
* [ARROW-9621](https://issues.apache.org/jira/browse/ARROW-9621) - [Python] test\_move\_file() is failed with fsspec 0.8.0
* [ARROW-9622](https://issues.apache.org/jira/browse/ARROW-9622) - [Java] ComplexCopier fails if a structvector has a child UnionVector with nulls
* [ARROW-9628](https://issues.apache.org/jira/browse/ARROW-9628) - [Rust] Clippy PR test failing intermittently on Rust / AMD64 MacOS
* [ARROW-9629](https://issues.apache.org/jira/browse/ARROW-9629) - [Python] Kartothek integration tests failing due to missing freezegun module
* [ARROW-9631](https://issues.apache.org/jira/browse/ARROW-9631) - [Rust] Arrow crate should not depend on flight
* [ARROW-9631](https://issues.apache.org/jira/browse/ARROW-9631) - [Rust] Arrow crate should not depend on flight
* [ARROW-9642](https://issues.apache.org/jira/browse/ARROW-9642) - [C++] Let MakeBuilder refer DictionaryType's index\_type for deciding the starting bit width of the indices
* [ARROW-9643](https://issues.apache.org/jira/browse/ARROW-9643) - [C++] Illegal instruction on haswell cpu
* [ARROW-9644](https://issues.apache.org/jira/browse/ARROW-9644) - [C++][Dataset] Do not check for ignore\_prefixes in the base path
* [ARROW-9652](https://issues.apache.org/jira/browse/ARROW-9652) - [Rust][DataFusion] Panic trying to select \* from a CSV (panicked at 'index out of bounds: the len is 0 but the index is 0)
* [ARROW-9653](https://issues.apache.org/jira/browse/ARROW-9653) - [Rust][DataFusion] Multi-column Group by: Invalid Argument Error
* [ARROW-9659](https://issues.apache.org/jira/browse/ARROW-9659) - [C++] RecordBatchStreamReader throws on CUDA device buffers
* [ARROW-9660](https://issues.apache.org/jira/browse/ARROW-9660) - [C++] IPC - dictionaries in maps
* [ARROW-9666](https://issues.apache.org/jira/browse/ARROW-9666) - [Python][wheel][Windows] library missing failure by ARROW-9412
* [ARROW-9670](https://issues.apache.org/jira/browse/ARROW-9670) - [C++][FlightRPC] Close()ing a DoPut with an ongoing read locks up the client
* [ARROW-9676](https://issues.apache.org/jira/browse/ARROW-9676) -  [R] Error converting Table with nested structs
* [ARROW-9684](https://issues.apache.org/jira/browse/ARROW-9684) - [C++] Fix undefined behaviour on invalid IPC / Parquet input (OSS-Fuzz)
* [ARROW-9692](https://issues.apache.org/jira/browse/ARROW-9692) - [Python] distutils import warning
* [ARROW-9693](https://issues.apache.org/jira/browse/ARROW-9693) - [CI][Docs] Nightly docs build fails
* [ARROW-9696](https://issues.apache.org/jira/browse/ARROW-9696) - [Rust] [Datafusion] nested binary expressions broken
* [ARROW-9698](https://issues.apache.org/jira/browse/ARROW-9698) - [C++] Revert "Add -NDEBUG flag to arrow.pc"
* [ARROW-9700](https://issues.apache.org/jira/browse/ARROW-9700) - [Python] create\_library\_symlinks doesn't work in macos
* [ARROW-9712](https://issues.apache.org/jira/browse/ARROW-9712) - [Rust] [DataFusion] ParquetScanExec panics on error
* [ARROW-9714](https://issues.apache.org/jira/browse/ARROW-9714) - [Rust] [DataFusion] TypeCoercionRule not implemented for Limit or Sort
* [ARROW-9716](https://issues.apache.org/jira/browse/ARROW-9716) - [Rust] [DataFusion] MergeExec  should have concurrency limit
* [ARROW-9726](https://issues.apache.org/jira/browse/ARROW-9726) - [Rust] [DataFusion] ParquetScanExec launches threads too early
* [ARROW-9727](https://issues.apache.org/jira/browse/ARROW-9727) - [C++] Fix crash on invalid IPC input (OSS-Fuzz)
* [ARROW-9729](https://issues.apache.org/jira/browse/ARROW-9729) - [Java] Error Prone causes other annotation processors to not work with Eclipse
* [ARROW-9733](https://issues.apache.org/jira/browse/ARROW-9733) - [Rust][DataFusion] Aggregates COUNT/MIN/MAX don't work on VARCHAR columns
* [ARROW-9734](https://issues.apache.org/jira/browse/ARROW-9734) - [Rust] [DataFusion] TableProvider.scan executing partitions prematurely
* [ARROW-9741](https://issues.apache.org/jira/browse/ARROW-9741) - [Rust] [DataFusion] Incorrect count in TPC-H query 1 result set
* [ARROW-9743](https://issues.apache.org/jira/browse/ARROW-9743) - [R] Sanitize paths in open\_dataset
* [ARROW-9744](https://issues.apache.org/jira/browse/ARROW-9744) - [Python] Failed to install on aarch64
* [ARROW-9764](https://issues.apache.org/jira/browse/ARROW-9764) - [CI][Java] Push wrong Docker image
* [ARROW-9768](https://issues.apache.org/jira/browse/ARROW-9768) - [Python] Pyarrow allows for unsafe conversions of datetime objects to timestamp nanoseconds
* [ARROW-9768](https://issues.apache.org/jira/browse/ARROW-9768) - [Python] Pyarrow allows for unsafe conversions of datetime objects to timestamp nanoseconds
* [ARROW-9778](https://issues.apache.org/jira/browse/ARROW-9778) - [Rust] [DataFusion] Logical and physical schemas' nullability does not match in 8 out of 20 end-to-end tests
* [ARROW-9783](https://issues.apache.org/jira/browse/ARROW-9783) - [Rust] [DataFusion] Logical aggregate expressions require explicit data type
* [ARROW-9785](https://issues.apache.org/jira/browse/ARROW-9785) - [Python] pyarrow/tests/test\_fs.py::test\_s3\_options too slow
* [ARROW-9789](https://issues.apache.org/jira/browse/ARROW-9789) - [C++] Don't install jemalloc in parallel
* [ARROW-9790](https://issues.apache.org/jira/browse/ARROW-9790) - [Rust] [Parquet] ParquetFileArrowReader fails to decode all pages if batches fall exactly on row group boundaries
* [ARROW-9790](https://issues.apache.org/jira/browse/ARROW-9790) - [Rust] [Parquet] ParquetFileArrowReader fails to decode all pages if batches fall exactly on row group boundaries
* [ARROW-9793](https://issues.apache.org/jira/browse/ARROW-9793) - [Rust] [DataFusion] Tests failing in master
* [ARROW-9797](https://issues.apache.org/jira/browse/ARROW-9797) - [Rust] AMD64 Conda Integration Tests is failing for the Master branch
* [ARROW-9799](https://issues.apache.org/jira/browse/ARROW-9799) - [Rust] [DataFusion] Implementation of physical binary expression get\_type method is incorrect
* [ARROW-9800](https://issues.apache.org/jira/browse/ARROW-9800) - [Rust] [Parquet] "min" and "max" written to standard out when writing columns
* [ARROW-9801](https://issues.apache.org/jira/browse/ARROW-9801) - DictionaryArray with non-unique values are silently corrupted when written to a Parquet file
* [ARROW-9809](https://issues.apache.org/jira/browse/ARROW-9809) - [Rust] [DataFusion] logical schema = physical schema is not true
* [ARROW-9814](https://issues.apache.org/jira/browse/ARROW-9814) - [Python] Crash in test\_parquet.py::test\_read\_partitioned\_directory\_s3fs
* [ARROW-9815](https://issues.apache.org/jira/browse/ARROW-9815) - [Rust] [DataFusion] Deadlock in creation of physical plan with two udfs
* [ARROW-9815](https://issues.apache.org/jira/browse/ARROW-9815) - [Rust] [DataFusion] Deadlock in creation of physical plan with two udfs
* [ARROW-9815](https://issues.apache.org/jira/browse/ARROW-9815) - [Rust] [DataFusion] Deadlock in creation of physical plan with two udfs
* [ARROW-9816](https://issues.apache.org/jira/browse/ARROW-9816) - [C++] Escape quotes in config.h
* [ARROW-9827](https://issues.apache.org/jira/browse/ARROW-9827) - [Python] pandas.read\_parquet fails for wide parquet files and pyarrow 1.0.X
* [ARROW-9831](https://issues.apache.org/jira/browse/ARROW-9831) - [Rust] [DataFusion] Fix compilation error
* [ARROW-9840](https://issues.apache.org/jira/browse/ARROW-9840) - [Python] Python fs documentation out of date with code
* [ARROW-9846](https://issues.apache.org/jira/browse/ARROW-9846) - [Rust] Master branch broken build
* [ARROW-9851](https://issues.apache.org/jira/browse/ARROW-9851) - [C++] Valgrind errors due to unrecognized instructions
* [ARROW-9852](https://issues.apache.org/jira/browse/ARROW-9852) - [C++] Fix crash on invalid IPC input (OSS-Fuzz)
* [ARROW-9852](https://issues.apache.org/jira/browse/ARROW-9852) - [C++] Fix crash on invalid IPC input (OSS-Fuzz)
* [ARROW-9855](https://issues.apache.org/jira/browse/ARROW-9855) - [R] Fix bad merge/Rcpp conflict
* [ARROW-9859](https://issues.apache.org/jira/browse/ARROW-9859) - [C++] S3 FileSystemFromUri with special char in secret key fails
* [ARROW-9864](https://issues.apache.org/jira/browse/ARROW-9864) - [Python] pathlib.Path not supported in write\_to\_dataset with partition columns
* [ARROW-9874](https://issues.apache.org/jira/browse/ARROW-9874) - [C++] NewStreamWriter / NewFileWriter don't own output stream
* [ARROW-9876](https://issues.apache.org/jira/browse/ARROW-9876) - [CI][C++] Travis ARM jobs timeout
* [ARROW-9877](https://issues.apache.org/jira/browse/ARROW-9877) - [C++][CI] homebrew-cpp fails due to avx512
* [ARROW-9879](https://issues.apache.org/jira/browse/ARROW-9879) - [Python] ChunkedArray.\_\_getitem\_\_ doesn't work with numpy scalars
* [ARROW-9882](https://issues.apache.org/jira/browse/ARROW-9882) - [C++/Python] Update conda-forge-pinning to 3 for OSX conda packages
* [ARROW-9883](https://issues.apache.org/jira/browse/ARROW-9883) - [R] Fix linuxlibs.R install script for R < 3.6
* [ARROW-9888](https://issues.apache.org/jira/browse/ARROW-9888) - [Rust] [DataFusion] ExecutionContext can not be shared between threads
* [ARROW-9889](https://issues.apache.org/jira/browse/ARROW-9889) - [Rust][DataFusion] Datafusion CLI: CREATE EXTERNAL TABLE errors with "Unsupported logical plan variant"
* [ARROW-9906](https://issues.apache.org/jira/browse/ARROW-9906) - [Python] Crash in test\_parquet.py::test\_parquet\_writer\_filesystem\_s3\_uri (closing NativeFile from S3FileSystem)
* [ARROW-9913](https://issues.apache.org/jira/browse/ARROW-9913) - [C++] Outputs of Decimal128::FromString depend on presence of one another
* [ARROW-9920](https://issues.apache.org/jira/browse/ARROW-9920) - [Python] pyarrow.concat\_arrays segfaults when passing it a chunked array
* [ARROW-9922](https://issues.apache.org/jira/browse/ARROW-9922) - [Rust] Add \`try\_from(Vec<Option<(&str, ArrayRef)\>\>)\` to StructArray
* [ARROW-9924](https://issues.apache.org/jira/browse/ARROW-9924) - [Python] Performance regression reading individual Parquet files using Dataset interface
* [ARROW-9931](https://issues.apache.org/jira/browse/ARROW-9931) - [C++] Fix undefined behaviour on invalid IPC (OSS-Fuzz)
* [ARROW-9932](https://issues.apache.org/jira/browse/ARROW-9932) - [R] Arrow 1.0.1 R package fails to install on R3.4 over linux
* [ARROW-9936](https://issues.apache.org/jira/browse/ARROW-9936) - [Python] Fix / test relative file paths in pyarrow.parquet
* [ARROW-9937](https://issues.apache.org/jira/browse/ARROW-9937) - [Rust] [DataFusion] Average is not correct
* [ARROW-9943](https://issues.apache.org/jira/browse/ARROW-9943) - [C++] Arrow metadata not applied recursively when reading Parquet file
* [ARROW-9946](https://issues.apache.org/jira/browse/ARROW-9946) - [R] ParquetFileWriter segfaults when \`sink\` is a string
* [ARROW-9953](https://issues.apache.org/jira/browse/ARROW-9953) - [R] Declare minimum version for bit64
* [ARROW-9962](https://issues.apache.org/jira/browse/ARROW-9962) - [Python] Conversion to pandas with index column using fixed timezone fails
* [ARROW-9968](https://issues.apache.org/jira/browse/ARROW-9968) - [C++] UBSAN link failure with \_\_int8\_t
* [ARROW-9969](https://issues.apache.org/jira/browse/ARROW-9969) - [C++] RecordBatchBuilder yields invalid result with dictionary fields
* [ARROW-9970](https://issues.apache.org/jira/browse/ARROW-9970) - [Go] checkptr failures in sum methods
* [ARROW-9972](https://issues.apache.org/jira/browse/ARROW-9972) - [CI] Work around grpc-re2 clash on Homebrew
* [ARROW-9973](https://issues.apache.org/jira/browse/ARROW-9973) - [Java] JDBC DateConsumer does not allow dates before epoch
* [ARROW-9976](https://issues.apache.org/jira/browse/ARROW-9976) - [Python] ArrowCapacityError when doing Table.from\_pandas with large dataframe
* [ARROW-9990](https://issues.apache.org/jira/browse/ARROW-9990) - [Rust] [DataFusion] NOT is not plannable
* [ARROW-9993](https://issues.apache.org/jira/browse/ARROW-9993) - [Python] Tzinfo - string roundtrip fails on pytz.StaticTzInfo objects
* [ARROW-9994](https://issues.apache.org/jira/browse/ARROW-9994) - [C++][Python] Auto chunking nested array containing binary-like fields result malformed output
* [ARROW-9996](https://issues.apache.org/jira/browse/ARROW-9996) - [C++] Dictionary is unset when calling DictionaryArray.GetScalar for null values
* [ARROW-10003](https://issues.apache.org/jira/browse/ARROW-10003) - [C++] Create directories in CopyFiles when copying within the same filesystem
* [ARROW-10008](https://issues.apache.org/jira/browse/ARROW-10008) - [Python] pyarrow.parquet.read\_table fails with predicate pushdown on categorical data with use\_legacy\_dataset=False
* [ARROW-10011](https://issues.apache.org/jira/browse/ARROW-10011) - [C++] Make FindRE2.cmake re-entrant
* [ARROW-10012](https://issues.apache.org/jira/browse/ARROW-10012) - [C++] Sporadic failures in CopyFiles test
* [ARROW-10013](https://issues.apache.org/jira/browse/ARROW-10013) - [C++][CI] Flight test failure in TestFlightClient.GenericOptions
* [ARROW-10017](https://issues.apache.org/jira/browse/ARROW-10017) - [Java] LargeMemoryUtil.checkedCastToInt has buggy logic
* [ARROW-10022](https://issues.apache.org/jira/browse/ARROW-10022) - [C++] [Compute] core dumped on some scalar-arithmetic-benchmark
* [ARROW-10027](https://issues.apache.org/jira/browse/ARROW-10027) - [Python] Incorrect null column returned when using a dataset filter expression.
* [ARROW-10034](https://issues.apache.org/jira/browse/ARROW-10034) - [Rust] Master build broken
* [ARROW-10041](https://issues.apache.org/jira/browse/ARROW-10041) - [Rust] Possible to create LargeStringArray with DataType::Utf8
* [ARROW-10047](https://issues.apache.org/jira/browse/ARROW-10047) - [CI] Conda integration tests failing with cmake error
* [ARROW-10048](https://issues.apache.org/jira/browse/ARROW-10048) - [Rust] Error in aggregate of min/max for strings
* [ARROW-10049](https://issues.apache.org/jira/browse/ARROW-10049) - [C++/Python] Sync conda recipe with conda-forge
* [ARROW-10060](https://issues.apache.org/jira/browse/ARROW-10060) - [Rust] [DataFusion] MergeExec currently discards partitions with errors
* [ARROW-10062](https://issues.apache.org/jira/browse/ARROW-10062) - [Rust]: Fix for null elems for DoubleEndedIter for DictArray
* [ARROW-10073](https://issues.apache.org/jira/browse/ARROW-10073) - [Python] Test test\_parquet\_nested\_storage relies on dict item ordering
* [ARROW-10081](https://issues.apache.org/jira/browse/ARROW-10081) - [C++/Python] Fix bash syntax in drone.io conda builds
* [ARROW-10085](https://issues.apache.org/jira/browse/ARROW-10085) - [C++] S3 tests fail on AppVeyor
* [ARROW-10087](https://issues.apache.org/jira/browse/ARROW-10087) - [CI] Fix nightly docs job
* [ARROW-10098](https://issues.apache.org/jira/browse/ARROW-10098) - [R][Doc] Fix copy\_files doc mismatch
* [ARROW-10104](https://issues.apache.org/jira/browse/ARROW-10104) - [Python] Separate tests into its own conda package
* [ARROW-10114](https://issues.apache.org/jira/browse/ARROW-10114) - [R] Segfault in to\_dataframe\_parallel with deeply nested structs
* [ARROW-10116](https://issues.apache.org/jira/browse/ARROW-10116) - [Python][Packaging] Fix gRPC linking error in macOS wheels builds
* [ARROW-10119](https://issues.apache.org/jira/browse/ARROW-10119) - [C++] Fix Parquet crashes on invalid input (OSS-Fuzz)
* [ARROW-10121](https://issues.apache.org/jira/browse/ARROW-10121) - [C++][Python] Variable dictionaries do not survive roundtrip to IPC stream
* [ARROW-10124](https://issues.apache.org/jira/browse/ARROW-10124) - [R] Write functions don't follow umask setting
* [ARROW-10125](https://issues.apache.org/jira/browse/ARROW-10125) - [R] Int64 downcast check doesn't consider all chunks
* [ARROW-10130](https://issues.apache.org/jira/browse/ARROW-10130) - [C++][Dataset] ParquetFileFragment::SplitByRowGroup does not preserve "complete\_metadata" status
* [ARROW-10136](https://issues.apache.org/jira/browse/ARROW-10136) - [Rust][Arrow] Nulls are transformed into "" after filtering for StringArray
* [ARROW-10137](https://issues.apache.org/jira/browse/ARROW-10137) - [R] Fix cpp helper that breaks if libarrow is not present
* [ARROW-10147](https://issues.apache.org/jira/browse/ARROW-10147) - [Python] Constructing pandas metadata fails if an Index name is not JSON-serializable by default
* [ARROW-10150](https://issues.apache.org/jira/browse/ARROW-10150) - [C++] Fix crashes on invalid Parquet file (OSS-Fuzz)
* [ARROW-10169](https://issues.apache.org/jira/browse/ARROW-10169) - [Rust] Nulls should be rendered as "" rather than default value when pretty printing arrays
* [ARROW-10175](https://issues.apache.org/jira/browse/ARROW-10175) - [CI] Nightly hdfs integration test job fails
* [ARROW-10176](https://issues.apache.org/jira/browse/ARROW-10176) - [CI] Nightly valgrind job fails
* [ARROW-10178](https://issues.apache.org/jira/browse/ARROW-10178) - [CI] Fix spark master integration test build setup
* [ARROW-10179](https://issues.apache.org/jira/browse/ARROW-10179) - [Rust] Labeler is not labeling
* [ARROW-10181](https://issues.apache.org/jira/browse/ARROW-10181) - [Rust] Arrow tests fail to compile on Raspberry Pi (32 bit)
* [ARROW-10188](https://issues.apache.org/jira/browse/ARROW-10188) - [Rust] [DataFusion] Some examples are broken
* [ARROW-10189](https://issues.apache.org/jira/browse/ARROW-10189) - [Doc] C data interface example for i32 uses \`l\`, not \`i\`, in the format
* [ARROW-10192](https://issues.apache.org/jira/browse/ARROW-10192) - [C++][Python] Segfault when converting nested struct array with dictionary field to pandas series
* [ARROW-10193](https://issues.apache.org/jira/browse/ARROW-10193) - [Python] Segfault when converting to fixed size binary array
* [ARROW-10200](https://issues.apache.org/jira/browse/ARROW-10200) - [Java][CI] Fix failure of Java CI on s390x
* [ARROW-10204](https://issues.apache.org/jira/browse/ARROW-10204) - [RUST] [Datafusion] Test failure in aggregate\_grouped\_empty with simd feature enabled
* [ARROW-10214](https://issues.apache.org/jira/browse/ARROW-10214) - [Python] UnicodeDecodeError when printing schema with binary metadata
* [ARROW-10226](https://issues.apache.org/jira/browse/ARROW-10226) - [Rust] [Parquet] Parquet reader reading wrong columns in some batches within a parquet file
* [ARROW-10230](https://issues.apache.org/jira/browse/ARROW-10230) - [JS][Doc] JavaScript documentation fails to build
* [ARROW-10232](https://issues.apache.org/jira/browse/ARROW-10232) - FixedSizeListArray is incorrectly written/read to/from parquet
* [ARROW-10234](https://issues.apache.org/jira/browse/ARROW-10234) - [C++][Gandiva] Fix logic of round() for floats/decimals in Gandiva
* [ARROW-10237](https://issues.apache.org/jira/browse/ARROW-10237) - [C++] Duplicate values in a dictionary result in corrupted parquet
* [ARROW-10238](https://issues.apache.org/jira/browse/ARROW-10238) - [C\#] List<Struct\> is broken
* [ARROW-10239](https://issues.apache.org/jira/browse/ARROW-10239) - [C++] aws-sdk-cpp apparently requires zlib too
* [ARROW-10244](https://issues.apache.org/jira/browse/ARROW-10244) - [Python][Docs] Add docs on using pyarrow.dataset.parquet\_dataset
* [ARROW-10248](https://issues.apache.org/jira/browse/ARROW-10248) - [C++][Dataset] Dataset writing does not write schema metadata
* [ARROW-10262](https://issues.apache.org/jira/browse/ARROW-10262) - [C++] Some TypeClass in Scalar classes seem incorrect
* [ARROW-10271](https://issues.apache.org/jira/browse/ARROW-10271) - [Rust] packed\_simd is broken and continued under a new project
* [ARROW-10279](https://issues.apache.org/jira/browse/ARROW-10279) - [Release][Python] Fix verification script to align with the new macos wheel platform tags
* [ARROW-10280](https://issues.apache.org/jira/browse/ARROW-10280) - [Packaging][Python] Fix macOS wheel artifact patterns
* [ARROW-10281](https://issues.apache.org/jira/browse/ARROW-10281) - [Python] Fix warnings when running tests
* [ARROW-10284](https://issues.apache.org/jira/browse/ARROW-10284) - [Python] Pyarrow is raising deprecation warning about filesystems on import
* [ARROW-10285](https://issues.apache.org/jira/browse/ARROW-10285) - [Python] pyarrow.orc submodule is using deprecated functionality
* [ARROW-10286](https://issues.apache.org/jira/browse/ARROW-10286) - [C++][Flight] Misleading CMake errors
* [ARROW-10288](https://issues.apache.org/jira/browse/ARROW-10288) - [C++] Compilation fails on i386
* [ARROW-10290](https://issues.apache.org/jira/browse/ARROW-10290) - [C++] List POP\_BACK is not available in older CMake versions
* [ARROW-10296](https://issues.apache.org/jira/browse/ARROW-10296) - [R] Data saved as integer64 loaded as integer
* [ARROW-10517](https://issues.apache.org/jira/browse/ARROW-10517) - [Python] Unable to read/write Parquet datasets with fsspec on Azure Blob
* [ARROW-11062](https://issues.apache.org/jira/browse/ARROW-11062) - [Java] When writing to flight stream, Spark's mapPartitions is not working


## New Features and Improvements

* [ARROW-983](https://issues.apache.org/jira/browse/ARROW-983) - [C++] Implement InputStream and OutputStream classes for interacting with socket connections
* [ARROW-1509](https://issues.apache.org/jira/browse/ARROW-1509) - [Python] Write serialized object as a stream of encapsulated IPC messages
* [ARROW-1644](https://issues.apache.org/jira/browse/ARROW-1644) - [C++][Parquet] Read and write nested Parquet data with a mix of struct and list nesting levels
* [ARROW-1669](https://issues.apache.org/jira/browse/ARROW-1669) - [C++] Consider adding Abseil (Google C++11 standard library extensions) to toolchain
* [ARROW-1797](https://issues.apache.org/jira/browse/ARROW-1797) - [C++] Implement binary arithmetic kernels for numeric arrays
* [ARROW-2164](https://issues.apache.org/jira/browse/ARROW-2164) - [C++] Clean up unnecessary decimal module refs
* [ARROW-3080](https://issues.apache.org/jira/browse/ARROW-3080) - [Python] Unify Arrow to Python object conversion paths
* [ARROW-3757](https://issues.apache.org/jira/browse/ARROW-3757) - [R] R bindings for Flight RPC client
* [ARROW-3850](https://issues.apache.org/jira/browse/ARROW-3850) - [Python] Support MapType and StructType for enhanced PySpark integration
* [ARROW-3872](https://issues.apache.org/jira/browse/ARROW-3872) - [R] Add ad hoc test of feather compatibility
* [ARROW-4046](https://issues.apache.org/jira/browse/ARROW-4046) - [Python/CI] Exercise large memory tests
* [ARROW-4248](https://issues.apache.org/jira/browse/ARROW-4248) - [C++][Plasma] Build on Windows / Visual Studio
* [ARROW-4685](https://issues.apache.org/jira/browse/ARROW-4685) - [C++] Update Boost to 1.69 in manylinux1 docker image
* [ARROW-4927](https://issues.apache.org/jira/browse/ARROW-4927) - [Rust] Update top level README to describe current functionality
* [ARROW-4957](https://issues.apache.org/jira/browse/ARROW-4957) - [Rust] [DataFusion] Implement get\_supertype correctly
* [ARROW-4965](https://issues.apache.org/jira/browse/ARROW-4965) - [Python] Timestamp array type detection should use tzname of datetime.datetime objects
* [ARROW-5034](https://issues.apache.org/jira/browse/ARROW-5034) - [C\#] ArrowStreamWriter should expose synchronous Write methods
* [ARROW-5123](https://issues.apache.org/jira/browse/ARROW-5123) - [Rust] derive RecordWriter from struct definitions
* [ARROW-6075](https://issues.apache.org/jira/browse/ARROW-6075) - [FlightRPC] Handle uncaught exceptions in middleware
* [ARROW-6281](https://issues.apache.org/jira/browse/ARROW-6281) - [Python] Produce chunked arrays for nested types in pyarrow.array
* [ARROW-6282](https://issues.apache.org/jira/browse/ARROW-6282) - [Format] Support lossy compression
* [ARROW-6437](https://issues.apache.org/jira/browse/ARROW-6437) - [R] Add AWS SDK to system dependencies for macOS and Windows
* [ARROW-6535](https://issues.apache.org/jira/browse/ARROW-6535) - [C++] Status::WithMessage should accept variadic parameters
* [ARROW-6537](https://issues.apache.org/jira/browse/ARROW-6537) - [R] Pass column\_types to CSV reader
* [ARROW-6972](https://issues.apache.org/jira/browse/ARROW-6972) - [C\#] Should support StructField arrays
* [ARROW-6982](https://issues.apache.org/jira/browse/ARROW-6982) - [R] Add bindings for compare and boolean kernels
* [ARROW-7136](https://issues.apache.org/jira/browse/ARROW-7136) - [Rust][CI] Pre-install the rust dependencies in the dockerfile
* [ARROW-7218](https://issues.apache.org/jira/browse/ARROW-7218) - [Python] Conversion from boolean numpy scalars not working
* [ARROW-7302](https://issues.apache.org/jira/browse/ARROW-7302) - [C++] CSV: allow converting a column to a specific dictionary type
* [ARROW-7372](https://issues.apache.org/jira/browse/ARROW-7372) - [C++] Allow creating dictionary array from simple JSON
* [ARROW-7871](https://issues.apache.org/jira/browse/ARROW-7871) - [Python] Expose more compute kernels
* [ARROW-7960](https://issues.apache.org/jira/browse/ARROW-7960) - [C++][Parquet] Add support for schema translation from parquet nodes back to arrow for missing types
* [ARROW-8001](https://issues.apache.org/jira/browse/ARROW-8001) - [R][Dataset] Bindings for dataset writing
* [ARROW-8002](https://issues.apache.org/jira/browse/ARROW-8002) - [C++][Dataset] Dataset writing should let you (re)partition the data
* [ARROW-8048](https://issues.apache.org/jira/browse/ARROW-8048) - [Python] Run memory leak tests nightly as follow up to ARROW-4120
* [ARROW-8172](https://issues.apache.org/jira/browse/ARROW-8172) - [C++] ArrayFromJSON for dictionary arrays
* [ARROW-8205](https://issues.apache.org/jira/browse/ARROW-8205) - [Rust] [DataFusion] DataFusion should enforce unique field names in a schema
* [ARROW-8253](https://issues.apache.org/jira/browse/ARROW-8253) - [Rust] [DataFusion] Improve ergonomics of registering UDFs
* [ARROW-8262](https://issues.apache.org/jira/browse/ARROW-8262) - [Rust] [DataFusion] Add example that uses LogicalPlanBuilder
* [ARROW-8296](https://issues.apache.org/jira/browse/ARROW-8296) - [C++][Dataset] IpcFileFormat should support writing files with compressed buffers
* [ARROW-8355](https://issues.apache.org/jira/browse/ARROW-8355) - [Python] Reduce the number of pandas dependent test cases in test\_feather
* [ARROW-8359](https://issues.apache.org/jira/browse/ARROW-8359) - [C++/Python] Enable aarch64/ppc64le build in conda recipes
* [ARROW-8383](https://issues.apache.org/jira/browse/ARROW-8383) - [Rust] Easier random access to DictionaryArray keys and values
* [ARROW-8402](https://issues.apache.org/jira/browse/ARROW-8402) - [Java] Support ValidateFull methods in Java
* [ARROW-8493](https://issues.apache.org/jira/browse/ARROW-8493) - [C++] Create unified schema resolution code for Array reconstruction.
* [ARROW-8494](https://issues.apache.org/jira/browse/ARROW-8494) - [C++] Implement basic array-by-array  reassembly logic
* [ARROW-8581](https://issues.apache.org/jira/browse/ARROW-8581) - [C\#] Date32/64Array.Builder should accept DateTime, not DateTimeOffset
* [ARROW-8601](https://issues.apache.org/jira/browse/ARROW-8601) - [Go][Flight] Implement Flight Writer interface
* [ARROW-8601](https://issues.apache.org/jira/browse/ARROW-8601) - [Go][Flight] Implement Flight Writer interface
* [ARROW-8618](https://issues.apache.org/jira/browse/ARROW-8618) - [C++] ASSIGN\_OR\_RAISE should move its argument
* [ARROW-8678](https://issues.apache.org/jira/browse/ARROW-8678) - [C++][Parquet] Remove legacy arrow to level translation.
* [ARROW-8712](https://issues.apache.org/jira/browse/ARROW-8712) - [R] Expose strptime timestamp parsing in read\_csv conversion options
* [ARROW-8774](https://issues.apache.org/jira/browse/ARROW-8774) - [Rust] [DataFusion] Improve threading model
* [ARROW-8810](https://issues.apache.org/jira/browse/ARROW-8810) - [R] Add documentation about Parquet format, appending to stream format
* [ARROW-8824](https://issues.apache.org/jira/browse/ARROW-8824) - [Rust] [DataFusion] Implement new SQL parser
* [ARROW-8828](https://issues.apache.org/jira/browse/ARROW-8828) - [Rust] Implement SQL tokenizer
* [ARROW-8829](https://issues.apache.org/jira/browse/ARROW-8829) - [Rust] Implement SQL parser
* [ARROW-9010](https://issues.apache.org/jira/browse/ARROW-9010) - [Java] Framework and interface changes for RecordBatch IPC buffer compression
* [ARROW-9065](https://issues.apache.org/jira/browse/ARROW-9065) - [C++] Support parsing date32 in dataset partition folders
* [ARROW-9068](https://issues.apache.org/jira/browse/ARROW-9068) - [C++][Dataset] Simplify Partitioning interface
* [ARROW-9078](https://issues.apache.org/jira/browse/ARROW-9078) - [C++] Parquet writing of extension type with nested storage type fails
* [ARROW-9104](https://issues.apache.org/jira/browse/ARROW-9104) - [C++] Parquet encryption tests should write files to a temporary directory instead of the testing submodule's directory
* [ARROW-9107](https://issues.apache.org/jira/browse/ARROW-9107) - [C++][Dataset] Time-based types support
* [ARROW-9147](https://issues.apache.org/jira/browse/ARROW-9147) - [C++][Dataset] Support null -\> other type promotion in Dataset scanning
* [ARROW-9205](https://issues.apache.org/jira/browse/ARROW-9205) - [Documentation] Fix typos in Columnar.rst
* [ARROW-9266](https://issues.apache.org/jira/browse/ARROW-9266) - [Python][Packaging] Enable S3 support in macOS wheels
* [ARROW-9271](https://issues.apache.org/jira/browse/ARROW-9271) - [R] Preserve data frame metadata in round trip
* [ARROW-9286](https://issues.apache.org/jira/browse/ARROW-9286) - [C++] Add function "aliases" to compute::FunctionRegistry
* [ARROW-9328](https://issues.apache.org/jira/browse/ARROW-9328) - [C++][Gandiva] Add LTRIM, RTRIM, BTRIM functions for string
* [ARROW-9338](https://issues.apache.org/jira/browse/ARROW-9338) - [Rust] Add instructions for running clippy locally
* [ARROW-9344](https://issues.apache.org/jira/browse/ARROW-9344) - [C++][Flight] measure latency quantile in flight benchmark
* [ARROW-9358](https://issues.apache.org/jira/browse/ARROW-9358) - [Integration] Reconsider generated\_large\_batch.json
* [ARROW-9371](https://issues.apache.org/jira/browse/ARROW-9371) - [Java] Run vector tests for both allocators
* [ARROW-9377](https://issues.apache.org/jira/browse/ARROW-9377) - [Java] Support unsigned dictionary indices
* [ARROW-9387](https://issues.apache.org/jira/browse/ARROW-9387) - [R] Use new C++ table select method
* [ARROW-9388](https://issues.apache.org/jira/browse/ARROW-9388) - [C++] Division kernels
* [ARROW-9394](https://issues.apache.org/jira/browse/ARROW-9394) - [Python] Support pickling of Scalars
* [ARROW-9398](https://issues.apache.org/jira/browse/ARROW-9398) - [C++] Register the SIMD sum variants under function instance instead a SIMD function
* [ARROW-9402](https://issues.apache.org/jira/browse/ARROW-9402) - [C++] Add portable wrappers for \_\_builtin\_add\_overflow and friends
* [ARROW-9405](https://issues.apache.org/jira/browse/ARROW-9405) - [R] Switch to cpp11
* [ARROW-9412](https://issues.apache.org/jira/browse/ARROW-9412) - [C++] Add non-BUNDLED dependencies to exported INSTALL\_INTERFACE\_LIBS of arrow\_static and test that it works
* [ARROW-9429](https://issues.apache.org/jira/browse/ARROW-9429) - [Python] ChunkedArray.to\_numpy
* [ARROW-9454](https://issues.apache.org/jira/browse/ARROW-9454) - [GLib] Add binding of some dictionary builders
* [ARROW-9465](https://issues.apache.org/jira/browse/ARROW-9465) - [Python] Improve ergonomics of compute functions
* [ARROW-9469](https://issues.apache.org/jira/browse/ARROW-9469) - [Python] Make more objects weakrefable
* [ARROW-9487](https://issues.apache.org/jira/browse/ARROW-9487) - [Developer] Cover the archery release utilities with unittests
* [ARROW-9488](https://issues.apache.org/jira/browse/ARROW-9488) - [Release] Use the new changelog generation when updating the website
* [ARROW-9507](https://issues.apache.org/jira/browse/ARROW-9507) - [Rust] [DataFusion] PhysicalExpr should implement Display trait
* [ARROW-9508](https://issues.apache.org/jira/browse/ARROW-9508) - [Release][APT][Yum] Enable verification for arm64 binaries
* [ARROW-9516](https://issues.apache.org/jira/browse/ARROW-9516) - [Rust][DataFusion] Refactor physical expressions to not care about their names nor indexes
* [ARROW-9517](https://issues.apache.org/jira/browse/ARROW-9517) - [C++][Python] Allow session\_token argument when initializing S3FileSystem
* [ARROW-9518](https://issues.apache.org/jira/browse/ARROW-9518) - [Python] Deprecate pyarrow serialization
* [ARROW-9521](https://issues.apache.org/jira/browse/ARROW-9521) - [Rust] CsvReadOptions should allow file extension to be specified
* [ARROW-9523](https://issues.apache.org/jira/browse/ARROW-9523) - [Rust] improve performance of filter kernel
* [ARROW-9534](https://issues.apache.org/jira/browse/ARROW-9534) - [Rust] [DataFusion] Implement functions for creating literal expressions for all types
* [ARROW-9550](https://issues.apache.org/jira/browse/ARROW-9550) - [Rust] [DataFusion] Remove Rc<RefCell<\_\>\> from hash aggregate operator
* [ARROW-9553](https://issues.apache.org/jira/browse/ARROW-9553) - [Rust] Release script doesn't bump parquet crate's arrow dependency version
* [ARROW-9557](https://issues.apache.org/jira/browse/ARROW-9557) - [R] Iterating over parquet columns is slow in R
* [ARROW-9559](https://issues.apache.org/jira/browse/ARROW-9559) - [Rust] [DataFusion] Revert privatization of exprlist\_to\_fields
* [ARROW-9563](https://issues.apache.org/jira/browse/ARROW-9563) - [Dev][Release] Use archery's changelog generator when creating release notes for the website
* [ARROW-9568](https://issues.apache.org/jira/browse/ARROW-9568) - [CI] Use official msys action on GHA
* [ARROW-9576](https://issues.apache.org/jira/browse/ARROW-9576) - [Python][Doc] Fix error in code example for extension types
* [ARROW-9580](https://issues.apache.org/jira/browse/ARROW-9580) - [JS] Docs have superfluous ()
* [ARROW-9581](https://issues.apache.org/jira/browse/ARROW-9581) - [Dev][Release] Bump next snapshot versions to 2.0.0
* [ARROW-9582](https://issues.apache.org/jira/browse/ARROW-9582) - [Rust] Implement Array::memory\_size()
* [ARROW-9585](https://issues.apache.org/jira/browse/ARROW-9585) - [Rust] Remove duplicated to-do line in DataFusion readme
* [ARROW-9587](https://issues.apache.org/jira/browse/ARROW-9587) - [FlightRPC][Java] Clean up DoPut/FlightStream memory handling
* [ARROW-9593](https://issues.apache.org/jira/browse/ARROW-9593) - [Python] Add custom pickle reducers for DictionaryScalar
* [ARROW-9604](https://issues.apache.org/jira/browse/ARROW-9604) - [C++] Add benchmark for aggregate min/max compute kernels
* [ARROW-9605](https://issues.apache.org/jira/browse/ARROW-9605) - [C++] Optimize performance for aggregate min/max compute kernels
* [ARROW-9607](https://issues.apache.org/jira/browse/ARROW-9607) - [C++][Gandiva] Add bitwise\_and(), bitwise\_or() and bitwise\_not() functions for integers
* [ARROW-9608](https://issues.apache.org/jira/browse/ARROW-9608) - [Rust] Remove arrow flight from parquet's feature gating
* [ARROW-9615](https://issues.apache.org/jira/browse/ARROW-9615) - [Rust] Add kernel to compute length of string array
* [ARROW-9617](https://issues.apache.org/jira/browse/ARROW-9617) - [Rust] [DataFusion] Add length of string array
* [ARROW-9618](https://issues.apache.org/jira/browse/ARROW-9618) - [Rust] [DataFusion] Make it easier to write optimizers
* [ARROW-9619](https://issues.apache.org/jira/browse/ARROW-9619) - [Rust] [DataFusion] Add predicate push-down
* [ARROW-9632](https://issues.apache.org/jira/browse/ARROW-9632) - [Rust] Add a "new" method for ExecutionContextSchemaProvider
* [ARROW-9638](https://issues.apache.org/jira/browse/ARROW-9638) - [C++][Compute] Implement mode(most frequent number) kernel
* [ARROW-9639](https://issues.apache.org/jira/browse/ARROW-9639) - [Ruby] Add dependency version check
* [ARROW-9640](https://issues.apache.org/jira/browse/ARROW-9640) - [C++][Gandiva] Implement round() for integers and long integers
* [ARROW-9641](https://issues.apache.org/jira/browse/ARROW-9641) - [C++][Gandiva] Implement round() for floating point and double floating point numbers
* [ARROW-9645](https://issues.apache.org/jira/browse/ARROW-9645) - [Python] Deprecate the legacy pyarrow.filesystem interface
* [ARROW-9646](https://issues.apache.org/jira/browse/ARROW-9646) - [C++][Dataset] Add support for writing parquet datasets
* [ARROW-9650](https://issues.apache.org/jira/browse/ARROW-9650) - [Packaging][APT] Drop support for Ubuntu 19.10
* [ARROW-9654](https://issues.apache.org/jira/browse/ARROW-9654) - [Rust][DataFusion] Add an EXPLAIN command to the datafusion CLI
* [ARROW-9656](https://issues.apache.org/jira/browse/ARROW-9656) - [Rust][DataFusion] Slightly confusing error message when unsupported type is provided to CREATE EXTERNAL TABLE
* [ARROW-9658](https://issues.apache.org/jira/browse/ARROW-9658) - [Python][Dataset] Bindings for dataset writing
* [ARROW-9665](https://issues.apache.org/jira/browse/ARROW-9665) - [R] head/tail/take for Datasets
* [ARROW-9667](https://issues.apache.org/jira/browse/ARROW-9667) - [CI][Crossbow] Segfault in 2 nightly R builds
* [ARROW-9671](https://issues.apache.org/jira/browse/ARROW-9671) - [C++] BasicDecimal128 constructor interprets uint64\_t integers with highest bit set as negative
* [ARROW-9673](https://issues.apache.org/jira/browse/ARROW-9673) - [Rust] Add a param "dialect" for DFParser::parse\_sql
* [ARROW-9678](https://issues.apache.org/jira/browse/ARROW-9678) - [Rust] [DataFusion] Improve projection push down to remove unused columns
* [ARROW-9679](https://issues.apache.org/jira/browse/ARROW-9679) - [Rust] [DataFusion] HashAggregate walks map many times building final batch
* [ARROW-9681](https://issues.apache.org/jira/browse/ARROW-9681) - [Java] Failed Arrow Memory - Core on big-endian platform
* [ARROW-9683](https://issues.apache.org/jira/browse/ARROW-9683) - [Rust][DataFusion] Implement Debug for ExecutionPlan trait
* [ARROW-9691](https://issues.apache.org/jira/browse/ARROW-9691) - [Rust] [DataFusion] Make sql\_statement\_to\_plan public
* [ARROW-9695](https://issues.apache.org/jira/browse/ARROW-9695) - [Rust][DataFusion] Improve documentation on LogicalPlan variants
* [ARROW-9699](https://issues.apache.org/jira/browse/ARROW-9699) - [C++][Compute] Improve mode kernel performance for small integer types
* [ARROW-9701](https://issues.apache.org/jira/browse/ARROW-9701) - [Java][CI] Add a test job on s390x
* [ARROW-9702](https://issues.apache.org/jira/browse/ARROW-9702) - [C++] Move bpacking simd to runtime path
* [ARROW-9703](https://issues.apache.org/jira/browse/ARROW-9703) - [Developer][Archery] Restartable cherry-picking process for creating maintenance branches
* [ARROW-9706](https://issues.apache.org/jira/browse/ARROW-9706) - [Java] Tests in TestLargeListVector fails on big endian platform
* [ARROW-9710](https://issues.apache.org/jira/browse/ARROW-9710) - [C++] Generalize Decimal ToString in preparation for Decimal256
* [ARROW-9711](https://issues.apache.org/jira/browse/ARROW-9711) - [Rust] Add benchmark based on TPC-H
* [ARROW-9713](https://issues.apache.org/jira/browse/ARROW-9713) - [Rust][DataFusion] Remove explicit panics
* [ARROW-9715](https://issues.apache.org/jira/browse/ARROW-9715) - [R] changelog/doc updates for 1.0.1
* [ARROW-9718](https://issues.apache.org/jira/browse/ARROW-9718) - [Python] Make pyarrow.parquet work with the new filesystem interfaces
* [ARROW-9721](https://issues.apache.org/jira/browse/ARROW-9721) - [Packaging][Python] Update wheel dependency files
* [ARROW-9722](https://issues.apache.org/jira/browse/ARROW-9722) - [Rust]: Shorten key lifetime for reverse lookup for dictionary arrays
* [ARROW-9723](https://issues.apache.org/jira/browse/ARROW-9723) - [C++] Expected behaviour of "mode" kernel with NaNs ?
* [ARROW-9725](https://issues.apache.org/jira/browse/ARROW-9725) - [Rust] [DataFusion] LimitExec and SortExec should use MergeExec
* [ARROW-9737](https://issues.apache.org/jira/browse/ARROW-9737) - [C++][Gandiva] Add bitwise\_xor() for integers
* [ARROW-9739](https://issues.apache.org/jira/browse/ARROW-9739) - [CI][Ruby] Don't install gem documents
* [ARROW-9742](https://issues.apache.org/jira/browse/ARROW-9742) - [Rust] Create one standard DataFrame API
* [ARROW-9751](https://issues.apache.org/jira/browse/ARROW-9751) - [Rust] [DataFusion] Extend UDFs to accept more than one type per argument
* [ARROW-9752](https://issues.apache.org/jira/browse/ARROW-9752) - [Rust] [DataFusion] Add support for Aggregate UDFs
* [ARROW-9753](https://issues.apache.org/jira/browse/ARROW-9753) - [Rust] [DataFusion] Remove the use of Mutex in ExecutionPlan trait
* [ARROW-9754](https://issues.apache.org/jira/browse/ARROW-9754) - [Rust] [DataFusion] Implement async in DataFusion traits
* [ARROW-9757](https://issues.apache.org/jira/browse/ARROW-9757) - [Rust] [DataFusion] Use "pub use" to expose a clean public API
* [ARROW-9758](https://issues.apache.org/jira/browse/ARROW-9758) - [Rust] [DataFusion] Implement extension API for DataFusion
* [ARROW-9759](https://issues.apache.org/jira/browse/ARROW-9759) - [Rust] [DataFusion] Implement DataFrame::sort
* [ARROW-9760](https://issues.apache.org/jira/browse/ARROW-9760) - [Rust] [DataFusion] Implement DataFrame::explain
* [ARROW-9761](https://issues.apache.org/jira/browse/ARROW-9761) - [C++] Add experimental pull-based iterator structures to C interface implementation
* [ARROW-9762](https://issues.apache.org/jira/browse/ARROW-9762) - [Rust] [DataFusion] ExecutionContext::sql should return DataFrame
* [ARROW-9769](https://issues.apache.org/jira/browse/ARROW-9769) - [Python] Remove skip for in-memory fsspec in test\_move\_file
* [ARROW-9775](https://issues.apache.org/jira/browse/ARROW-9775) - [C++] Automatic S3 region selection
* [ARROW-9781](https://issues.apache.org/jira/browse/ARROW-9781) - [C++] Fix uninitialized value warnings
* [ARROW-9782](https://issues.apache.org/jira/browse/ARROW-9782) - [C++][Dataset] Ability to write ".feather" files with IpcFileFormat
* [ARROW-9784](https://issues.apache.org/jira/browse/ARROW-9784) - [Rust] [DataFusion] Improve instructions for running tpch benchmark
* [ARROW-9786](https://issues.apache.org/jira/browse/ARROW-9786) - [R] Unvendor cpp11 before release
* [ARROW-9788](https://issues.apache.org/jira/browse/ARROW-9788) - Handle naming inconsistencies between SQL, DataFrame API and struct names
* [ARROW-9792](https://issues.apache.org/jira/browse/ARROW-9792) - [Rust] [DataFusion] Logical aggregate functions should not return Result
* [ARROW-9794](https://issues.apache.org/jira/browse/ARROW-9794) - [C++] Add functionality to cpu\_info to discriminate between Intel vs AMD x86
* [ARROW-9795](https://issues.apache.org/jira/browse/ARROW-9795) - [C++][Gandiva] Implement castTIMESTAMP(int64) in Gandiva
* [ARROW-9806](https://issues.apache.org/jira/browse/ARROW-9806) - [R] More compute kernel bindings
* [ARROW-9807](https://issues.apache.org/jira/browse/ARROW-9807) - [R] News update/version bump post-1.0.1
* [ARROW-9808](https://issues.apache.org/jira/browse/ARROW-9808) - [Python] parquet.read\_table docstring wrong use\_legacy\_dataset explanation
* [ARROW-9811](https://issues.apache.org/jira/browse/ARROW-9811) - [C++] Unchecked floating point division by 0 should succeed
* [ARROW-9813](https://issues.apache.org/jira/browse/ARROW-9813) - [C++] Disable semantic interposition
* [ARROW-9819](https://issues.apache.org/jira/browse/ARROW-9819) - [C++] Bump mimalloc to 1.6.4
* [ARROW-9821](https://issues.apache.org/jira/browse/ARROW-9821) - [Rust][DataFusion] User Defined PlanNode / Operator API
* [ARROW-9821](https://issues.apache.org/jira/browse/ARROW-9821) - [Rust][DataFusion] User Defined PlanNode / Operator API
* [ARROW-9823](https://issues.apache.org/jira/browse/ARROW-9823) - [CI][C++][MinGW] Enable S3
* [ARROW-9832](https://issues.apache.org/jira/browse/ARROW-9832) - [Rust] [DataFusion] Refactor PhysicalPlan to remove Partition
* [ARROW-9833](https://issues.apache.org/jira/browse/ARROW-9833) - [Rust] [DataFusion] Refactor TableProvider.scan to return ExecutionPlan
* [ARROW-9834](https://issues.apache.org/jira/browse/ARROW-9834) - [Rust] [DataFusion] Remove Partition trait
* [ARROW-9835](https://issues.apache.org/jira/browse/ARROW-9835) - [Rust] [DataFusion] Remove FunctionMeta
* [ARROW-9836](https://issues.apache.org/jira/browse/ARROW-9836) - [Rust] [DataFusion] Improve API for usage of UDFs
* [ARROW-9837](https://issues.apache.org/jira/browse/ARROW-9837) - [Rust] Add provider for variable
* [ARROW-9838](https://issues.apache.org/jira/browse/ARROW-9838) - [Rust] [DataFusion] DefaultPhysicalPlanner should insert explicit MergeExec nodes
* [ARROW-9839](https://issues.apache.org/jira/browse/ARROW-9839) - [Rust] [DataFusion] Add ability to downcast ExecutionPlan to specific operator
* [ARROW-9841](https://issues.apache.org/jira/browse/ARROW-9841) - [Rust] Update checked-in flatbuffer files
* [ARROW-9844](https://issues.apache.org/jira/browse/ARROW-9844) - [Go][CI] Add Travis CI job for Go on s390x
* [ARROW-9845](https://issues.apache.org/jira/browse/ARROW-9845) - [Rust] [Parquet] serde\_json is only used in tests but isn't in dev-dependencies
* [ARROW-9848](https://issues.apache.org/jira/browse/ARROW-9848) - [Rust] Implement changes to ensure flatbuffer alignment
* [ARROW-9849](https://issues.apache.org/jira/browse/ARROW-9849) - [Rust] [DataFusion] Make UDFs not need a Field
* [ARROW-9850](https://issues.apache.org/jira/browse/ARROW-9850) - [Go] Defer should not be used in the loop
* [ARROW-9853](https://issues.apache.org/jira/browse/ARROW-9853) - [RUST] Implement "take" kernel for dictionary arrays
* [ARROW-9854](https://issues.apache.org/jira/browse/ARROW-9854) - [R] Support reading/writing data to/from S3
* [ARROW-9858](https://issues.apache.org/jira/browse/ARROW-9858) - [C++][Python][Docs] Expand user guide for FileSystem
* [ARROW-9863](https://issues.apache.org/jira/browse/ARROW-9863) - [C++] [PARQUET] Optimize meta data recovery of ApplicationVersion
* [ARROW-9867](https://issues.apache.org/jira/browse/ARROW-9867) - [C++][Dataset] FileSystemDataset should expose its filesystem
* [ARROW-9868](https://issues.apache.org/jira/browse/ARROW-9868) - [C++] Provide utility for copying files between filesystems
* [ARROW-9869](https://issues.apache.org/jira/browse/ARROW-9869) - [R] Implement full S3FileSystem/S3Options constructor
* [ARROW-9870](https://issues.apache.org/jira/browse/ARROW-9870) - [R] Friendly interface for filesystems (S3)
* [ARROW-9871](https://issues.apache.org/jira/browse/ARROW-9871) - [C++] Add uppercase support to ARROW\_USER\_SIMD\_LEVEL.
* [ARROW-9873](https://issues.apache.org/jira/browse/ARROW-9873) - [C++][Compute] Improve mode kernel for intergers within limited value range
* [ARROW-9875](https://issues.apache.org/jira/browse/ARROW-9875) - [Python] Let FileSystem.get\_file\_info accept a single path
* [ARROW-9884](https://issues.apache.org/jira/browse/ARROW-9884) - [R] Bindings for writing datasets to Parquet
* [ARROW-9885](https://issues.apache.org/jira/browse/ARROW-9885) - [Rust] [DataFusion] Simplify code of type coercion for binary types
* [ARROW-9886](https://issues.apache.org/jira/browse/ARROW-9886) - [Rust] [DataFusion] Simplify code to test cast
* [ARROW-9887](https://issues.apache.org/jira/browse/ARROW-9887) - [Rust] [DataFusion] Add support for complex return types of built-in functions
* [ARROW-9890](https://issues.apache.org/jira/browse/ARROW-9890) - [R] Add zstandard compression codec in macOS build
* [ARROW-9891](https://issues.apache.org/jira/browse/ARROW-9891) - [Rust] [DataFusion] Make math functions support f32
* [ARROW-9892](https://issues.apache.org/jira/browse/ARROW-9892) - [Rust] [DataFusion] Add support for concat
* [ARROW-9893](https://issues.apache.org/jira/browse/ARROW-9893) - [Python] Bindings for writing datasets to Parquet
* [ARROW-9895](https://issues.apache.org/jira/browse/ARROW-9895) - [RUST] Improve sort kernels
* [ARROW-9899](https://issues.apache.org/jira/browse/ARROW-9899) - [Rust] [DataFusion] Switch from Box<Schema\> --\> SchemaRef (Arc<Schema\>) to be consistent with the rest of Arrow
* [ARROW-9900](https://issues.apache.org/jira/browse/ARROW-9900) - [Rust][DataFusion] Use Arc<\> instead of Box<\> in LogicalPlan
* [ARROW-9901](https://issues.apache.org/jira/browse/ARROW-9901) - [C++] Add hand-crafted Parquet to Arrow reconstruction test for nested reading
* [ARROW-9902](https://issues.apache.org/jira/browse/ARROW-9902) - [Rust] [DataFusion] Add support for array()
* [ARROW-9904](https://issues.apache.org/jira/browse/ARROW-9904) - [C++] Unroll the loop manually for CountSetBits
* [ARROW-9908](https://issues.apache.org/jira/browse/ARROW-9908) - [Rust] Support temporal data types in JSON reader
* [ARROW-9910](https://issues.apache.org/jira/browse/ARROW-9910) - [Rust] [DataFusion] Type coercion of Variadic is wrong
* [ARROW-9914](https://issues.apache.org/jira/browse/ARROW-9914) - [Rust][DataFusion] Document the SQL -\> Arrow type mapping
* [ARROW-9916](https://issues.apache.org/jira/browse/ARROW-9916) - [RUST] Avoid cloning ArrayData in several places
* [ARROW-9917](https://issues.apache.org/jira/browse/ARROW-9917) - [Python][Compute] Add bindings for mode kernel
* [ARROW-9919](https://issues.apache.org/jira/browse/ARROW-9919) - [Rust] [DataFusion] Math functions
* [ARROW-9921](https://issues.apache.org/jira/browse/ARROW-9921) - [Rust] Add \`from(Vec<Option<&str\>\>)\` to [Large]StringArray
* [ARROW-9925](https://issues.apache.org/jira/browse/ARROW-9925) - [GLib] Add low level value readers for GArrowListArray family
* [ARROW-9926](https://issues.apache.org/jira/browse/ARROW-9926) - [GLib] Use placement new for GArrowRecordBatchFileReader
* [ARROW-9928](https://issues.apache.org/jira/browse/ARROW-9928) - [C++] Speed up integer parsing slightly
* [ARROW-9929](https://issues.apache.org/jira/browse/ARROW-9929) - [Developer] Autotune cmake-format
* [ARROW-9933](https://issues.apache.org/jira/browse/ARROW-9933) - [Developer] Add drone as a CI provider for crossbow
* [ARROW-9934](https://issues.apache.org/jira/browse/ARROW-9934) - [Rust] Shape and stride check in tensor
* [ARROW-9941](https://issues.apache.org/jira/browse/ARROW-9941) - [Python] Better string representation for extension types
* [ARROW-9944](https://issues.apache.org/jira/browse/ARROW-9944) - [Rust] Implement TO\_TIMESTAMP function
* [ARROW-9949](https://issues.apache.org/jira/browse/ARROW-9949) - [C++] Generalize Decimal128::FromString for reuse in Decimal256
* [ARROW-9950](https://issues.apache.org/jira/browse/ARROW-9950) - [Rust] [DataFusion] Allow UDF usage without registry
* [ARROW-9952](https://issues.apache.org/jira/browse/ARROW-9952) - [Python] Use pyarrow.dataset writing for pq.write\_to\_dataset
* [ARROW-9954](https://issues.apache.org/jira/browse/ARROW-9954) - [Rust] [DataFusion] Simplify code of aggregate planning
* [ARROW-9956](https://issues.apache.org/jira/browse/ARROW-9956) - [C++][Gandiva] Implement Binary string function in Gandiva
* [ARROW-9957](https://issues.apache.org/jira/browse/ARROW-9957) - [Rust] Remove unmaintained tempdir dependency
* [ARROW-9961](https://issues.apache.org/jira/browse/ARROW-9961) - [Rust][DataFusion] to\_timestamp function parses timestamp without timezone offset as UTC rather than local
* [ARROW-9964](https://issues.apache.org/jira/browse/ARROW-9964) - [C++] CSV date support
* [ARROW-9965](https://issues.apache.org/jira/browse/ARROW-9965) - [Java] Buffer capacity calculations are slow for fixed-width vectors
* [ARROW-9966](https://issues.apache.org/jira/browse/ARROW-9966) - [Rust] Speedup aggregate kernels
* [ARROW-9967](https://issues.apache.org/jira/browse/ARROW-9967) - [Python] Add compute module docs
* [ARROW-9971](https://issues.apache.org/jira/browse/ARROW-9971) - [Rust] Speedup take
* [ARROW-9977](https://issues.apache.org/jira/browse/ARROW-9977) - [Rust] Add min/max for [Large]String
* [ARROW-9979](https://issues.apache.org/jira/browse/ARROW-9979) - [Rust] Fix arrow crate clippy lints
* [ARROW-9980](https://issues.apache.org/jira/browse/ARROW-9980) - [Rust] Fix parquet crate clippy lints
* [ARROW-9981](https://issues.apache.org/jira/browse/ARROW-9981) - [Rust] Allow configuring flight IPC with IpcWriteOptions
* [ARROW-9983](https://issues.apache.org/jira/browse/ARROW-9983) - [C++][Dataset][Python] Use larger default batch size than 32K for Datasets API
* [ARROW-9984](https://issues.apache.org/jira/browse/ARROW-9984) - [Rust] [DataFusion] DRY of function to string
* [ARROW-9986](https://issues.apache.org/jira/browse/ARROW-9986) - [Rust][DataFusion] TO\_TIMESTAMP function erroneously requires fractional seconds when no timezone is present
* [ARROW-9987](https://issues.apache.org/jira/browse/ARROW-9987) - [Rust] [DataFusion] Improve docs of \`Expr\`.
* [ARROW-9988](https://issues.apache.org/jira/browse/ARROW-9988) - [Rust] [DataFusion] Added std::ops to logical expressions
* [ARROW-9992](https://issues.apache.org/jira/browse/ARROW-9992) - [C++][Python] Refactor python to arrow conversions based on a reusable conversion API
* [ARROW-9998](https://issues.apache.org/jira/browse/ARROW-9998) - [Python] Support pickling DictionaryScalar
* [ARROW-9999](https://issues.apache.org/jira/browse/ARROW-9999) - [Python] Support constructing dictionary array directly through pa.array()
* [ARROW-10000](https://issues.apache.org/jira/browse/ARROW-10000) - [C++][Python] Support constructing StructArray from list of key-value pairs
* [ARROW-10001](https://issues.apache.org/jira/browse/ARROW-10001) - [Rust] [DataFusion] Add developer guide to README
* [ARROW-10010](https://issues.apache.org/jira/browse/ARROW-10010) - [Rust] Speedup arithmetic
* [ARROW-10015](https://issues.apache.org/jira/browse/ARROW-10015) - [Rust] Implement SIMD for aggregate kernel sum
* [ARROW-10016](https://issues.apache.org/jira/browse/ARROW-10016) - [Rust] [DataFusion] Implement IsNull and IsNotNull
* [ARROW-10018](https://issues.apache.org/jira/browse/ARROW-10018) - [CI] Disable Sphinx and API documentation build since it takes 6 hours on master
* [ARROW-10019](https://issues.apache.org/jira/browse/ARROW-10019) - [Rust] Add substring kernel
* [ARROW-10023](https://issues.apache.org/jira/browse/ARROW-10023) - [Gandiva][C++] Implementing Split part function in gandiva
* [ARROW-10024](https://issues.apache.org/jira/browse/ARROW-10024) - [C++][Parquet] Create nested reading benchmarks
* [ARROW-10028](https://issues.apache.org/jira/browse/ARROW-10028) - [Rust] Simplify macro def\_numeric\_from\_vec
* [ARROW-10030](https://issues.apache.org/jira/browse/ARROW-10030) - [Rust] Support fromIter and toIter
* [ARROW-10035](https://issues.apache.org/jira/browse/ARROW-10035) - [C++] Bump versions of vendored code
* [ARROW-10037](https://issues.apache.org/jira/browse/ARROW-10037) - [C++] Workaround to force find AWS SDK to look for shared libraries
* [ARROW-10040](https://issues.apache.org/jira/browse/ARROW-10040) - [Rust] Create a way to slice unalligned offset buffers
* [ARROW-10043](https://issues.apache.org/jira/browse/ARROW-10043) - [Rust] [DataFusion] Introduce support for DISTINCT by partially implementing COUNT(DISTINCT)
* [ARROW-10044](https://issues.apache.org/jira/browse/ARROW-10044) - [Rust] Improve README
* [ARROW-10046](https://issues.apache.org/jira/browse/ARROW-10046) - [Rust] [DataFusion] Made \`\*Iterator\` implement Iterator
* [ARROW-10050](https://issues.apache.org/jira/browse/ARROW-10050) - [C++][Gandiva] Implement concat() in Gandiva for up to 10 arguments
* [ARROW-10051](https://issues.apache.org/jira/browse/ARROW-10051) - [C++][Compute] Make aggregate kernel merge state mutable
* [ARROW-10054](https://issues.apache.org/jira/browse/ARROW-10054) - [Python] Slice methods should return empty arrays instead of crashing
* [ARROW-10055](https://issues.apache.org/jira/browse/ARROW-10055) - [Rust] Implement DoubleEndedIterator for NullableIter
* [ARROW-10057](https://issues.apache.org/jira/browse/ARROW-10057) - [C++] Add Parquet-Arrow roundtrip tests for nested data
* [ARROW-10058](https://issues.apache.org/jira/browse/ARROW-10058) - [C++] Investigate performance of LevelsToBitmap without BMI2
* [ARROW-10059](https://issues.apache.org/jira/browse/ARROW-10059) - [R][Doc] Give more advice on how to set up C++ build
* [ARROW-10063](https://issues.apache.org/jira/browse/ARROW-10063) - [Archery][CI] Fetch main branch in archery build only when it is a pull request
* [ARROW-10064](https://issues.apache.org/jira/browse/ARROW-10064) - [C++] Resolve compile warnings on Apple Clang 12
* [ARROW-10065](https://issues.apache.org/jira/browse/ARROW-10065) - [Rust] DRY downcasted Arrays
* [ARROW-10066](https://issues.apache.org/jira/browse/ARROW-10066) - [C++] Make sure that default AWS region is respected
* [ARROW-10068](https://issues.apache.org/jira/browse/ARROW-10068) - [C++] Add bundled external project for aws-sdk-cpp
* [ARROW-10069](https://issues.apache.org/jira/browse/ARROW-10069) - [Java] Support running Java benchmarks from command line
* [ARROW-10070](https://issues.apache.org/jira/browse/ARROW-10070) - [C++][Compute] Implement stdev aggregate kernel
* [ARROW-10071](https://issues.apache.org/jira/browse/ARROW-10071) - [R] segfault with ArrowObject from previous session, or saved
* [ARROW-10074](https://issues.apache.org/jira/browse/ARROW-10074) - [C++] Don't use string\_view.to\_string()
* [ARROW-10075](https://issues.apache.org/jira/browse/ARROW-10075) - [C++] Don't use nonstd::nullopt this breaks out vendoring abstraction.
* [ARROW-10076](https://issues.apache.org/jira/browse/ARROW-10076) - [C++] Use TemporaryDir for all tests that don't already use it.
* [ARROW-10077](https://issues.apache.org/jira/browse/ARROW-10077) - [C++] Potential overflow in bit\_stream\_utils.h multiplication.
* [ARROW-10083](https://issues.apache.org/jira/browse/ARROW-10083) - [C++] Improve Parquet fuzz seed corpus
* [ARROW-10084](https://issues.apache.org/jira/browse/ARROW-10084) - [Rust] [DataFusion] Add length of large string array
* [ARROW-10086](https://issues.apache.org/jira/browse/ARROW-10086) - [Rust] Migrate min\_large\_string -\> min\_string kernels
* [ARROW-10090](https://issues.apache.org/jira/browse/ARROW-10090) - [C++][Compute] Improve mode kernel
* [ARROW-10092](https://issues.apache.org/jira/browse/ARROW-10092) - [Dev][Go] Add grpc generated go files to rat exclusion list
* [ARROW-10093](https://issues.apache.org/jira/browse/ARROW-10093) - [R] Add ability to opt-out of int64 -\> int demotion
* [ARROW-10096](https://issues.apache.org/jira/browse/ARROW-10096) - [Rust] [DataFusion] Remove unused code
* [ARROW-10099](https://issues.apache.org/jira/browse/ARROW-10099) - [C++][Dataset] Also allow integer partition fields to be dictionary encoded
* [ARROW-10100](https://issues.apache.org/jira/browse/ARROW-10100) - [C++][Dataset] Ability to read/subset a ParquetFileFragment with given set of row group ids
* [ARROW-10102](https://issues.apache.org/jira/browse/ARROW-10102) - [C++] Generalize BasicDecimal128::operator\*= for reuse in Decimal256
* [ARROW-10103](https://issues.apache.org/jira/browse/ARROW-10103) - [Rust] Add a Contains kernel
* [ARROW-10105](https://issues.apache.org/jira/browse/ARROW-10105) - [FlightRPC] Add client option to disable certificate validation with TLS
* [ARROW-10120](https://issues.apache.org/jira/browse/ARROW-10120) - [C++][Parquet] Create reading benchmarks for 2-level nested data
* [ARROW-10127](https://issues.apache.org/jira/browse/ARROW-10127) - [Format] Update specification to support 256-bit Decimal types
* [ARROW-10129](https://issues.apache.org/jira/browse/ARROW-10129) - [Rust] Cargo build is rebuilding dependencies on arrow changes
* [ARROW-10134](https://issues.apache.org/jira/browse/ARROW-10134) - [C++][Dataset] Add ParquetFileFragment::num\_row\_groups property
* [ARROW-10139](https://issues.apache.org/jira/browse/ARROW-10139) - [C++] Add support for building arrow\_testing without building tests
* [ARROW-10148](https://issues.apache.org/jira/browse/ARROW-10148) - [Rust] Add documentation to lib.rs
* [ARROW-10151](https://issues.apache.org/jira/browse/ARROW-10151) - [Python] Add support MapArray to\_pandas conversion
* [ARROW-10155](https://issues.apache.org/jira/browse/ARROW-10155) - [Rust] [DataFusion] Add documentation to lib.rs
* [ARROW-10156](https://issues.apache.org/jira/browse/ARROW-10156) - [Rust] Auto-label PRs
* [ARROW-10157](https://issues.apache.org/jira/browse/ARROW-10157) - [Rust] Add more documentation about take
* [ARROW-10160](https://issues.apache.org/jira/browse/ARROW-10160) - [Rust] Improve documentation of DictionaryType
* [ARROW-10161](https://issues.apache.org/jira/browse/ARROW-10161) - [Rust] [DataFusion] Simplify expression tests
* [ARROW-10162](https://issues.apache.org/jira/browse/ARROW-10162) - [Rust] Support display of DictionaryArrays in pretty printing
* [ARROW-10164](https://issues.apache.org/jira/browse/ARROW-10164) - [Rust] Add support for DictionaryArray types to cast kernels
* [ARROW-10167](https://issues.apache.org/jira/browse/ARROW-10167) - [Rust] Support display of DictionaryArrays in sql.rs
* [ARROW-10171](https://issues.apache.org/jira/browse/ARROW-10171) - [Rust] [DataFusion] Add \`ExecutionContext::from<ExecutionContextState\>\`
* [ARROW-10190](https://issues.apache.org/jira/browse/ARROW-10190) - [Website] Add Jorge to list of committers
* [ARROW-10196](https://issues.apache.org/jira/browse/ARROW-10196) - [C++] Add Future::DeferNotOk()
* [ARROW-10199](https://issues.apache.org/jira/browse/ARROW-10199) - [Rust][Parquet] Release Parquet at crates.io to remove debug prints
* [ARROW-10201](https://issues.apache.org/jira/browse/ARROW-10201) - [C++][CI] Disable S3 in arm64 job on Travis CI
* [ARROW-10202](https://issues.apache.org/jira/browse/ARROW-10202) - [CI][Windows] Use sf.net mirror for MSYS2
* [ARROW-10205](https://issues.apache.org/jira/browse/ARROW-10205) - [Java][FlightRPC] Add client option to disable server verification
* [ARROW-10206](https://issues.apache.org/jira/browse/ARROW-10206) - [Python][C++][FlightRPC] Add client option to disable server validation
* [ARROW-10215](https://issues.apache.org/jira/browse/ARROW-10215) - [Rust] [DataFusion] Rename "Source" typedef
* [ARROW-10217](https://issues.apache.org/jira/browse/ARROW-10217) - [CI] Run fewer GitHub Actions jobs
* [ARROW-10227](https://issues.apache.org/jira/browse/ARROW-10227) - [Ruby] Use a table size as the default for parquet chunk\_size
* [ARROW-10229](https://issues.apache.org/jira/browse/ARROW-10229) - [C++][Parquet] Remove left over ARROW\_LOG statement.
* [ARROW-10231](https://issues.apache.org/jira/browse/ARROW-10231) - [CI] Unable to download minio in arm32v7 docker image
* [ARROW-10233](https://issues.apache.org/jira/browse/ARROW-10233) - [Rust] Make array\_value\_to\_string available in all Arrow builds
* [ARROW-10235](https://issues.apache.org/jira/browse/ARROW-10235) - [Rust][DataFusion] Improve documentation for type coercion
* [ARROW-10240](https://issues.apache.org/jira/browse/ARROW-10240) - [Rust] [Datafusion] Optionally load tpch data into memory before running benchmark query
* [ARROW-10251](https://issues.apache.org/jira/browse/ARROW-10251) - [Rust] [DataFusion] MemTable::load() should load partitions in parallel
* [ARROW-10252](https://issues.apache.org/jira/browse/ARROW-10252) - [Python] Add option to skip inclusion of Arrow headers in Python installation
* [ARROW-10256](https://issues.apache.org/jira/browse/ARROW-10256) - [C++][Flight] Disable -Werror carefully
* [ARROW-10257](https://issues.apache.org/jira/browse/ARROW-10257) - [R] Prepare news/docs for 2.0 release
* [ARROW-10260](https://issues.apache.org/jira/browse/ARROW-10260) - [Python] Missing MapType to Pandas dtype
* [ARROW-10265](https://issues.apache.org/jira/browse/ARROW-10265) - [CI] Use smaler build when cache doesn't exit on Travis CI
* [ARROW-10266](https://issues.apache.org/jira/browse/ARROW-10266) - [CI][macOS] Ensure using Python 3.8 with Homebrew
* [ARROW-10267](https://issues.apache.org/jira/browse/ARROW-10267) - [Python] Skip flight test if disable\_server\_verification feature is not available
* [ARROW-10272](https://issues.apache.org/jira/browse/ARROW-10272) - [Packaging][Python] Pin newer multibuild version to avoid updating homebrew
* [ARROW-10273](https://issues.apache.org/jira/browse/ARROW-10273) - [CI][Homebrew] Fix "brew audit" usage
* [ARROW-10287](https://issues.apache.org/jira/browse/ARROW-10287) - [C++] Avoid std::random\_device whenever possible
* [PARQUET-1845](https://issues.apache.org/jira/browse/PARQUET-1845) - [C++] Int96 memory images in test cases assume only little-endian
* [PARQUET-1878](https://issues.apache.org/jira/browse/PARQUET-1878) - [C++] lz4 codec is not compatible with Hadoop Lz4Codec
* [PARQUET-1904](https://issues.apache.org/jira/browse/PARQUET-1904) - [C++] Export file\_offset in RowGroupMetaData



# Apache Arrow 1.0.1 (2020-08-21)

## Bug Fixes

* [ARROW-9535](https://issues.apache.org/jira/browse/ARROW-9535) - [Python] Remove symlink fixes from conda recipe
* [ARROW-9536](https://issues.apache.org/jira/browse/ARROW-9536) - Missing parameters in PlasmaOutOfMemoryException.java
* [ARROW-9544](https://issues.apache.org/jira/browse/ARROW-9544) - [R] version argument of write\_parquet not working
* [ARROW-9549](https://issues.apache.org/jira/browse/ARROW-9549) - [Rust] Parquet no longer builds
* [ARROW-9556](https://issues.apache.org/jira/browse/ARROW-9556) - [Python][C++] Segfaults in UnionArray with null values
* [ARROW-9560](https://issues.apache.org/jira/browse/ARROW-9560) - [Packaging] conda recipes failing due to missing conda-forge.yml
* [ARROW-9569](https://issues.apache.org/jira/browse/ARROW-9569) - [CI][R] Fix rtools35 builds for msys2 key change
* [ARROW-9570](https://issues.apache.org/jira/browse/ARROW-9570) - [Doc] Clean up sphinx sidebar
* [ARROW-9573](https://issues.apache.org/jira/browse/ARROW-9573) - [Python] Parquet doesn't load when partitioned column starts with '\_'
* [ARROW-9574](https://issues.apache.org/jira/browse/ARROW-9574) - [R] Cleanups for CRAN 1.0.0 release
* [ARROW-9575](https://issues.apache.org/jira/browse/ARROW-9575) - [R] gcc-UBSAN failure on CRAN
* [ARROW-9577](https://issues.apache.org/jira/browse/ARROW-9577) - [Python][C++] posix\_madvise error on Debian in pyarrow 1.0.0
* [ARROW-9589](https://issues.apache.org/jira/browse/ARROW-9589) - [C++/R] arrow\_exports.h contains structs declared as class
* [ARROW-9592](https://issues.apache.org/jira/browse/ARROW-9592) - [CI] Update homebrew before calling brew bundle
* [ARROW-9596](https://issues.apache.org/jira/browse/ARROW-9596) - [CI][Crossbow] Fix homebrew-cpp again, again
* [ARROW-9598](https://issues.apache.org/jira/browse/ARROW-9598) - [C++][Parquet]  Spaced definition levels is not assigned correctly.
* [ARROW-9599](https://issues.apache.org/jira/browse/ARROW-9599) - [CI] Appveyor toolchain build fails because CMake detects different C and C++ compilers
* [ARROW-9600](https://issues.apache.org/jira/browse/ARROW-9600) - [Rust] When used as a crate dependency, arrow-flight is rebuilt on every invocation of cargo build
* [ARROW-9600](https://issues.apache.org/jira/browse/ARROW-9600) - [Rust] When used as a crate dependency, arrow-flight is rebuilt on every invocation of cargo build
* [ARROW-9602](https://issues.apache.org/jira/browse/ARROW-9602) - [R] Improve cmake detection in Linux build
* [ARROW-9606](https://issues.apache.org/jira/browse/ARROW-9606) - [C++][Dataset] in expressions don't work with \>1 partition levels
* [ARROW-9609](https://issues.apache.org/jira/browse/ARROW-9609) - [C++] CSV datasets don't materialize virtual columns
* [ARROW-9621](https://issues.apache.org/jira/browse/ARROW-9621) - [Python] test\_move\_file() is failed with fsspec 0.8.0
* [ARROW-9631](https://issues.apache.org/jira/browse/ARROW-9631) - [Rust] Arrow crate should not depend on flight
* [ARROW-9631](https://issues.apache.org/jira/browse/ARROW-9631) - [Rust] Arrow crate should not depend on flight
* [ARROW-9644](https://issues.apache.org/jira/browse/ARROW-9644) - [C++][Dataset] Do not check for ignore\_prefixes in the base path
* [ARROW-9659](https://issues.apache.org/jira/browse/ARROW-9659) - [C++] RecordBatchStreamReader throws on CUDA device buffers
* [ARROW-9684](https://issues.apache.org/jira/browse/ARROW-9684) - [C++] Fix undefined behaviour on invalid IPC / Parquet input (OSS-Fuzz)
* [ARROW-9700](https://issues.apache.org/jira/browse/ARROW-9700) - [Python] create\_library\_symlinks doesn't work in macos
* [ARROW-9712](https://issues.apache.org/jira/browse/ARROW-9712) - [Rust] [DataFusion] ParquetScanExec panics on error
* [ARROW-9743](https://issues.apache.org/jira/browse/ARROW-9743) - [R] Sanitize paths in open\_dataset
* [ARROW-10126](https://issues.apache.org/jira/browse/ARROW-10126) - [Python] Impossible to import pyarrow module in python. Generates this "ImportError: DLL load failed: The specified procedure could not be found."
* [ARROW-10460](https://issues.apache.org/jira/browse/ARROW-10460) - [FlightRPC][Python] FlightRPC authentication mechanism changed and is undocumented, breaking current working code


## New Features and Improvements

* [ARROW-9402](https://issues.apache.org/jira/browse/ARROW-9402) - [C++] Add portable wrappers for \_\_builtin\_add\_overflow and friends
* [ARROW-9563](https://issues.apache.org/jira/browse/ARROW-9563) - [Dev][Release] Use archery's changelog generator when creating release notes for the website
* [ARROW-9715](https://issues.apache.org/jira/browse/ARROW-9715) - [R] changelog/doc updates for 1.0.1
* [ARROW-9845](https://issues.apache.org/jira/browse/ARROW-9845) - [Rust] [Parquet] serde\_json is only used in tests but isn't in dev-dependencies



# Apache Arrow 1.0.0 (2020-07-24)

## Bug Fixes

* [ARROW-1692](https://issues.apache.org/jira/browse/ARROW-1692) - [Python, Java] UnionArray round trip not working
* [ARROW-3329](https://issues.apache.org/jira/browse/ARROW-3329) - [Python] Error casting decimal(38, 4) to int64
* [ARROW-3861](https://issues.apache.org/jira/browse/ARROW-3861) - [Python] ParquetDataset().read columns argument always returns partition column
* [ARROW-4018](https://issues.apache.org/jira/browse/ARROW-4018) - [C++] RLE decoder may not big-endian compatible
* [ARROW-4309](https://issues.apache.org/jira/browse/ARROW-4309) - [Documentation] Add a docker-compose entry which builds the documentation with CUDA enabled
* [ARROW-4600](https://issues.apache.org/jira/browse/ARROW-4600) - [Ruby] Arrow::DictionaryArray\#[] should returns the item in the indices array
* [ARROW-5158](https://issues.apache.org/jira/browse/ARROW-5158) - [Packaging][Wheel] Symlink libraries in wheels
* [ARROW-5310](https://issues.apache.org/jira/browse/ARROW-5310) - [Python] better error message on creating ParquetDataset from empty directory
* [ARROW-5359](https://issues.apache.org/jira/browse/ARROW-5359) - [Python] timestamp\_as\_object support for pa.Table.to\_pandas in pyarrow
* [ARROW-5572](https://issues.apache.org/jira/browse/ARROW-5572) - [Python] raise error message when passing invalid filter in parquet reading
* [ARROW-5666](https://issues.apache.org/jira/browse/ARROW-5666) - [Python] Underscores in partition (string) values are dropped when reading dataset
* [ARROW-5744](https://issues.apache.org/jira/browse/ARROW-5744) - [C++] Do not error in Table::CombineChunks for BinaryArray types that overflow 2GB limit
* [ARROW-5875](https://issues.apache.org/jira/browse/ARROW-5875) - [FlightRPC] Test RPC features in integration tests
* [ARROW-6235](https://issues.apache.org/jira/browse/ARROW-6235) - [R] Conversion from arrow::BinaryArray to R character vector not implemented
* [ARROW-6523](https://issues.apache.org/jira/browse/ARROW-6523) - [C++][Dataset] arrow\_dataset target does not depend on anything
* [ARROW-6848](https://issues.apache.org/jira/browse/ARROW-6848) - [C++] Specify -std=c++11 instead of -std=gnu++11 when building
* [ARROW-7018](https://issues.apache.org/jira/browse/ARROW-7018) - [R] Non-UTF-8 data in Arrow <--\> R conversion
* [ARROW-7028](https://issues.apache.org/jira/browse/ARROW-7028) - [R] Date roundtrip results in different R storage mode
* [ARROW-7084](https://issues.apache.org/jira/browse/ARROW-7084) - [C++]  ArrayRangeEquals should check for full type equality?
* [ARROW-7173](https://issues.apache.org/jira/browse/ARROW-7173) - [Integration] Add test to verify Map field names can be arbitrary
* [ARROW-7208](https://issues.apache.org/jira/browse/ARROW-7208) - [Python] Passing directory to ParquetFile class gives confusing error message
* [ARROW-7273](https://issues.apache.org/jira/browse/ARROW-7273) - [Python] Non-nullable null field is allowed / crashes when writing to parquet
* [ARROW-7480](https://issues.apache.org/jira/browse/ARROW-7480) - [Rust] [DataFusion] Query fails/incorrect when aggregated + grouped columns don't match the selected columns
* [ARROW-7610](https://issues.apache.org/jira/browse/ARROW-7610) - [Java] Finish support for 64 bit int allocations
* [ARROW-7654](https://issues.apache.org/jira/browse/ARROW-7654) - [Python] Ability to set column\_types to a Schema in csv.ConvertOptions is undocumented
* [ARROW-7681](https://issues.apache.org/jira/browse/ARROW-7681) - [Rust] Explicitly seeking a BufReader will discard the internal buffer
* [ARROW-7702](https://issues.apache.org/jira/browse/ARROW-7702) - [C++][Dataset] Provide (optional) deterministic order of batches
* [ARROW-7782](https://issues.apache.org/jira/browse/ARROW-7782) - [Python] Losing index information when using write\_to\_dataset with partition\_cols
* [ARROW-7840](https://issues.apache.org/jira/browse/ARROW-7840) - [Java] [Integration] Java executables fail
* [ARROW-7843](https://issues.apache.org/jira/browse/ARROW-7843) - [Ruby] MSYS2 packages needed for Gandiva
* [ARROW-7925](https://issues.apache.org/jira/browse/ARROW-7925) - [C++][Documentation] Instructions about running IWYU and other tasks in cpp/development.rst have gone stale
* [ARROW-7939](https://issues.apache.org/jira/browse/ARROW-7939) - [Python] crashes when reading parquet file compressed with snappy
* [ARROW-7967](https://issues.apache.org/jira/browse/ARROW-7967) - [CI][Crossbow] Pin macOS version in autobrew job to match CRAN
* [ARROW-8050](https://issues.apache.org/jira/browse/ARROW-8050) - [Python][Packaging] Do not include generated Cython source files in wheel packages
* [ARROW-8078](https://issues.apache.org/jira/browse/ARROW-8078) - [Python] Missing links in the docs regarding field and schema DataTypes
* [ARROW-8115](https://issues.apache.org/jira/browse/ARROW-8115) - [Python] Conversion when mixing NaT and datetime objects not working
* [ARROW-8251](https://issues.apache.org/jira/browse/ARROW-8251) - [Python] pandas.ExtensionDtype does not survive round trip with write\_to\_dataset
* [ARROW-8344](https://issues.apache.org/jira/browse/ARROW-8344) - [C\#] StringArray.Builder.Clear() corrupts subsequently-built array contents
* [ARROW-8360](https://issues.apache.org/jira/browse/ARROW-8360) - [C++][Gandiva] Fixes date32 support for date/time functions
* [ARROW-8374](https://issues.apache.org/jira/browse/ARROW-8374) - [R] Table to vector of DictonaryType will error when Arrays don't have the same Dictionary per array
* [ARROW-8392](https://issues.apache.org/jira/browse/ARROW-8392) - [Java] Fix overflow related corner cases for vector value comparison
* [ARROW-8448](https://issues.apache.org/jira/browse/ARROW-8448) - [Package] Can't build apt packages with ubuntu-focal
* [ARROW-8455](https://issues.apache.org/jira/browse/ARROW-8455) - [Rust] [Parquet] Arrow column read on partially compatible files
* [ARROW-8455](https://issues.apache.org/jira/browse/ARROW-8455) - [Rust] [Parquet] Arrow column read on partially compatible files
* [ARROW-8471](https://issues.apache.org/jira/browse/ARROW-8471) - [C++][Integration] Regression to /u?int64/ as JSON::number
* [ARROW-8472](https://issues.apache.org/jira/browse/ARROW-8472) - [Go][Integration] Represent 64 bit integers as JSON::string
* [ARROW-8473](https://issues.apache.org/jira/browse/ARROW-8473) - [Rust] "Statistics support" in rust/parquet readme is incorrect
* [ARROW-8480](https://issues.apache.org/jira/browse/ARROW-8480) - [Rust] There is no check for allocation failure
* [ARROW-8503](https://issues.apache.org/jira/browse/ARROW-8503) - [Packaging][deb] Can't build apache-arrow-archive-keyring for RC
* [ARROW-8505](https://issues.apache.org/jira/browse/ARROW-8505) - [Release][C\#] "sourcelink test" is failed by Apache.Arrow.AssemblyInfo.cs
* [ARROW-8508](https://issues.apache.org/jira/browse/ARROW-8508) - [Rust] ListBuilder of FixedSizeListBuilder creates wrong offsets
* [ARROW-8510](https://issues.apache.org/jira/browse/ARROW-8510) - [C++] arrow/dataset/file\_base.cc fails to compile with internal compiler error with "Visual Studio 15 2017 Win64" generator
* [ARROW-8511](https://issues.apache.org/jira/browse/ARROW-8511) - [Developer][Release] Windows release verification script does not halt if C++ compilation fails
* [ARROW-8514](https://issues.apache.org/jira/browse/ARROW-8514) - [Developer] Windows wheel verification script does not check Python 3.5
* [ARROW-8529](https://issues.apache.org/jira/browse/ARROW-8529) - [C++] Fix usage of NextCounts() in GetBatchWithDict[Spaced]
* [ARROW-8535](https://issues.apache.org/jira/browse/ARROW-8535) - [Rust] Arrow crate does not specify arrow-flight version
* [ARROW-8536](https://issues.apache.org/jira/browse/ARROW-8536) - [Rust] Failed to locate format/Flight.proto in any parent directory
* [ARROW-8537](https://issues.apache.org/jira/browse/ARROW-8537) - [C++] Performance regression from ARROW-8523
* [ARROW-8539](https://issues.apache.org/jira/browse/ARROW-8539) - [CI] "AMD64 MacOS 10.15 GLib & Ruby" fails
* [ARROW-8554](https://issues.apache.org/jira/browse/ARROW-8554) - [C++][Benchmark] Fix building error "cannot bind lvalue"
* [ARROW-8556](https://issues.apache.org/jira/browse/ARROW-8556) - [R] zstd symbol not found if there are multiple installations of zstd
* [ARROW-8566](https://issues.apache.org/jira/browse/ARROW-8566) - [R] error when writing POSIXct to spark
* [ARROW-8568](https://issues.apache.org/jira/browse/ARROW-8568) - [C++][Python] Crash on decimal cast in debug mode
* [ARROW-8577](https://issues.apache.org/jira/browse/ARROW-8577) - [Plasma] PlasmaClient::Connect() of CUDA enabled build is always failed on no CUDA device machine
* [ARROW-8583](https://issues.apache.org/jira/browse/ARROW-8583) - [C++][Doc] Undocumented parameter in Dataset namespace
* [ARROW-8584](https://issues.apache.org/jira/browse/ARROW-8584) - [Packaging][C++] Protobuf link error in deb builds
* [ARROW-8585](https://issues.apache.org/jira/browse/ARROW-8585) - [Packaging][Python] Windows wheels fail to build because of link error
* [ARROW-8586](https://issues.apache.org/jira/browse/ARROW-8586) - [R] installation failure on CentOS 7
* [ARROW-8587](https://issues.apache.org/jira/browse/ARROW-8587) - [C++] Compilation error when linking arrow-flight-perf-server
* [ARROW-8592](https://issues.apache.org/jira/browse/ARROW-8592) - [C++] Docs still list LLVM 7 as compiler used
* [ARROW-8593](https://issues.apache.org/jira/browse/ARROW-8593) - [C++] Parquet file\_serialize\_test.cc fails to build with musl libc
* [ARROW-8598](https://issues.apache.org/jira/browse/ARROW-8598) - [Rust] simd\_compare\_op creates buffer of incorrect length when item count is not a multiple of T::lanes()
* [ARROW-8602](https://issues.apache.org/jira/browse/ARROW-8602) - [CMake] Fix ws2\_32 link issue when cross-compiling on Linux
* [ARROW-8603](https://issues.apache.org/jira/browse/ARROW-8603) - [Documentation] Fix Sphinx doxygen comment
* [ARROW-8604](https://issues.apache.org/jira/browse/ARROW-8604) - [R][CI] Update CI to use R 4.0
* [ARROW-8608](https://issues.apache.org/jira/browse/ARROW-8608) - [C++] Update vendored mpark/variant.h to  latest to fix NVCC compilation issues
* [ARROW-8609](https://issues.apache.org/jira/browse/ARROW-8609) - [C++] ORC JNI bridge crashed on null arrow buffer
* [ARROW-8610](https://issues.apache.org/jira/browse/ARROW-8610) - [Rust] DivideByZero when running arrow crate when simd feature is disabled
* [ARROW-8613](https://issues.apache.org/jira/browse/ARROW-8613) - [C++][Dataset] Raise error for unparsable partition value
* [ARROW-8615](https://issues.apache.org/jira/browse/ARROW-8615) - [R] Error better and insist on RandomAccessFile in read\_feather
* [ARROW-8617](https://issues.apache.org/jira/browse/ARROW-8617) - [Rust] simd\_load\_set\_invalid does not exist on aarch64
* [ARROW-8632](https://issues.apache.org/jira/browse/ARROW-8632) - [C++] Fix conversion error warning in array\_union\_test.cc
* [ARROW-8641](https://issues.apache.org/jira/browse/ARROW-8641) - [Python] Regression in feather: no longer supports permutation in column selection
* [ARROW-8643](https://issues.apache.org/jira/browse/ARROW-8643) - [Python] Tests with pandas master failing due to freq assertion
* [ARROW-8644](https://issues.apache.org/jira/browse/ARROW-8644) - [Python] Dask integration tests failing due to change in not including partition columns
* [ARROW-8646](https://issues.apache.org/jira/browse/ARROW-8646) - [Java] Allow UnionListWriter to write null values
* [ARROW-8649](https://issues.apache.org/jira/browse/ARROW-8649) - [Java] [Website] Java documentation on website is hidden
* [ARROW-8657](https://issues.apache.org/jira/browse/ARROW-8657) - [Python][C++][Parquet] Forward compatibility issue from 0.16 to 0.17 when using version='2.0'
* [ARROW-8663](https://issues.apache.org/jira/browse/ARROW-8663) - [Documentation] Small correction to building.rst
* [ARROW-8680](https://issues.apache.org/jira/browse/ARROW-8680) - [Rust] ComplexObjectArrayReader incorrect null value shuffling
* [ARROW-8684](https://issues.apache.org/jira/browse/ARROW-8684) - [Python] "SystemError: Bad call flags in \_PyMethodDef\_RawFastCallDict" in Python 3.7.7 on macOS when using pyarrow wheel
* [ARROW-8689](https://issues.apache.org/jira/browse/ARROW-8689) - [C++] S3 benchmarks fail linking
* [ARROW-8693](https://issues.apache.org/jira/browse/ARROW-8693) - [Python] Dataset.get\_fragments is missing an implicit cast when filtering
* [ARROW-8694](https://issues.apache.org/jira/browse/ARROW-8694) - [Python][Parquet] parquet.read\_schema() fails when loading wide table created from Pandas DataFrame
* [ARROW-8701](https://issues.apache.org/jira/browse/ARROW-8701) - [Rust] Unresolved import \`crate::compute::util::simd\_load\_set\_invalid\` on Raspberry Pi
* [ARROW-8704](https://issues.apache.org/jira/browse/ARROW-8704) - [C++] Fix Parquet crash on invalid input (OSS-Fuzz)
* [ARROW-8705](https://issues.apache.org/jira/browse/ARROW-8705) - [Java] ComplexCopier is skipping null values
* [ARROW-8706](https://issues.apache.org/jira/browse/ARROW-8706) - [C++][Parquet] Tracking JIRA for PARQUET-1857 (unencrypted INT16\_MAX Parquet row group limit)
* [ARROW-8710](https://issues.apache.org/jira/browse/ARROW-8710) - [Rust] Continuation marker not written correctly in IPC writer, and stream not flushed
* [ARROW-8722](https://issues.apache.org/jira/browse/ARROW-8722) - [Dev] "archery docker run -e" doesn't work
* [ARROW-8726](https://issues.apache.org/jira/browse/ARROW-8726) - [C++][Dataset] Mis-specified DirectoryPartitioning incorrectly uses the file name as value
* [ARROW-8728](https://issues.apache.org/jira/browse/ARROW-8728) - [C++]  Bitmap operation may cause buffer overflow
* [ARROW-8729](https://issues.apache.org/jira/browse/ARROW-8729) - [C++][Dataset] Only selecting a partition column results in empty table
* [ARROW-8734](https://issues.apache.org/jira/browse/ARROW-8734) - [R] improve nightly build installation
* [ARROW-8741](https://issues.apache.org/jira/browse/ARROW-8741) - [Python][Packaging] Keep VS2015 with for the windows wheels
* [ARROW-8750](https://issues.apache.org/jira/browse/ARROW-8750) - [Python] pyarrow.feather.write\_feather does not default to lz4 compression if it's available
* [ARROW-8768](https://issues.apache.org/jira/browse/ARROW-8768) - [R][CI] Fix nightly as-cran spurious failure
* [ARROW-8775](https://issues.apache.org/jira/browse/ARROW-8775) - [C++][FlightRPC] Integration client doesn't run integration tests
* [ARROW-8776](https://issues.apache.org/jira/browse/ARROW-8776) - [FlightRPC][C++] Flight/C++ middleware don't receive headers on failed calls to Java servers
* [ARROW-8798](https://issues.apache.org/jira/browse/ARROW-8798) - [C++] Fix Parquet crashes on invalid input (OSS-Fuzz)
* [ARROW-8799](https://issues.apache.org/jira/browse/ARROW-8799) - [C++][Dataset] Reading list column as nested dictionary segfaults
* [ARROW-8801](https://issues.apache.org/jira/browse/ARROW-8801) - [Python] Memory leak on read from parquet file with UTC timestamps using pandas
* [ARROW-8802](https://issues.apache.org/jira/browse/ARROW-8802) - [C++][Dataset] Schema metadata are lost when reading a subset of columns
* [ARROW-8803](https://issues.apache.org/jira/browse/ARROW-8803) - [Java] Row count should be set before loading buffers in VectorLoader
* [ARROW-8808](https://issues.apache.org/jira/browse/ARROW-8808) - [Rust] Divide by zero in arrays/builder.rs
* [ARROW-8809](https://issues.apache.org/jira/browse/ARROW-8809) - [Rust] schema mismatch in integration test
* [ARROW-8811](https://issues.apache.org/jira/browse/ARROW-8811) - [Java] Fix  build on master
* [ARROW-8820](https://issues.apache.org/jira/browse/ARROW-8820) - [C++][Gandiva] fix date\_trunc functions to return date types
* [ARROW-8821](https://issues.apache.org/jira/browse/ARROW-8821) - [Rust] nested binary expression with Like, NotLike and Not operator results in type cast error
* [ARROW-8825](https://issues.apache.org/jira/browse/ARROW-8825) - [C++] Cannot compiled pass with Wunused-parameter flag
* [ARROW-8826](https://issues.apache.org/jira/browse/ARROW-8826) - [Crossbow] remote URL should always have .git
* [ARROW-8832](https://issues.apache.org/jira/browse/ARROW-8832) - [Python] AttributeError: module 'pyarrow.fs' has no attribute 'S3FileSystem'
* [ARROW-8848](https://issues.apache.org/jira/browse/ARROW-8848) - [CI][C/Glib] MinGW build error
* [ARROW-8848](https://issues.apache.org/jira/browse/ARROW-8848) - [CI][C/Glib] MinGW build error
* [ARROW-8858](https://issues.apache.org/jira/browse/ARROW-8858) - [FlightRPC] Ensure headers are uniformly exposed
* [ARROW-8860](https://issues.apache.org/jira/browse/ARROW-8860) - [C++] IPC/Feather decompression broken for nested arrays
* [ARROW-8862](https://issues.apache.org/jira/browse/ARROW-8862) - [C++] NumericBuilder does not use MemoryPool passed to CTOR
* [ARROW-8863](https://issues.apache.org/jira/browse/ARROW-8863) - [C++] Array subclass constructors must set ArrayData::null\_count to 0 when there is no validity bitmap
* [ARROW-8869](https://issues.apache.org/jira/browse/ARROW-8869) - [Rust] [DataFusion] Type Coercion optimizer rule does not support new scan nodes
* [ARROW-8871](https://issues.apache.org/jira/browse/ARROW-8871) - [C++] Gandiva build failure
* [ARROW-8872](https://issues.apache.org/jira/browse/ARROW-8872) - [CI] Travis-CI jobs fail (can't open file 'ci/detect-changes.py')
* [ARROW-8874](https://issues.apache.org/jira/browse/ARROW-8874) - [C++][Dataset] Scanner::ToTable race when ScanTask exit early with an error
* [ARROW-8878](https://issues.apache.org/jira/browse/ARROW-8878) - [R] try\_download is confused when download.file.method isn't default
* [ARROW-8882](https://issues.apache.org/jira/browse/ARROW-8882) - [C\#] Add .editorconfig to C\# code
* [ARROW-8888](https://issues.apache.org/jira/browse/ARROW-8888) - [Python] Heuristic in dataframe\_to\_arrays that decides to multithread convert cause slow conversions
* [ARROW-8889](https://issues.apache.org/jira/browse/ARROW-8889) - [Python] Python 3.7 SIGSEGV when comparing RecordBatch to None
* [ARROW-8892](https://issues.apache.org/jira/browse/ARROW-8892) - [C++][CI] CI builds for MSVC do not build benchmarks
* [ARROW-8909](https://issues.apache.org/jira/browse/ARROW-8909) - [Java] Out of order writes using setSafe
* [ARROW-8911](https://issues.apache.org/jira/browse/ARROW-8911) - [C++] Slicing a ChunkedArray with zero chunks segfaults
* [ARROW-8924](https://issues.apache.org/jira/browse/ARROW-8924) - [C++][Gandiva] castDATE\_date32() may cause overflow
* [ARROW-8925](https://issues.apache.org/jira/browse/ARROW-8925) - [Rust] [DataFusion] CsvExec::schema() returns incorrect results
* [ARROW-8930](https://issues.apache.org/jira/browse/ARROW-8930) - [C++] libz.so linking error with liborc.a
* [ARROW-8932](https://issues.apache.org/jira/browse/ARROW-8932) - [C++] symbol resolution failures with liborc.a
* [ARROW-8946](https://issues.apache.org/jira/browse/ARROW-8946) - [Python] Add tests for parquet.write\_metadata metadata\_collector
* [ARROW-8948](https://issues.apache.org/jira/browse/ARROW-8948) - [Java][Integration] enable duplicate field names integration tests
* [ARROW-8951](https://issues.apache.org/jira/browse/ARROW-8951) - [C++] Fix compiler warning in compute/kernels/scalar\_cast\_temporal.cc
* [ARROW-8954](https://issues.apache.org/jira/browse/ARROW-8954) - [Website] ca-certificates should be listed in installation instructions
* [ARROW-8957](https://issues.apache.org/jira/browse/ARROW-8957) - [FlightRPC][C++] Fail to build due to IpcOptions
* [ARROW-8959](https://issues.apache.org/jira/browse/ARROW-8959) - [Rust] Broken build due to new benchmark crate using old API
* [ARROW-8962](https://issues.apache.org/jira/browse/ARROW-8962) - [C++] Linking failure with clang-4.0
* [ARROW-8968](https://issues.apache.org/jira/browse/ARROW-8968) - [C++][Gandiva] Show link warning message on s390x
* [ARROW-8975](https://issues.apache.org/jira/browse/ARROW-8975) - [FlightRPC][C++] Fix flaky MacOS tests
* [ARROW-8977](https://issues.apache.org/jira/browse/ARROW-8977) - [R] Table$create with schema crashes with some dictionary index types
* [ARROW-8978](https://issues.apache.org/jira/browse/ARROW-8978) - [C++][Compute] "Conditional jump or move depends on uninitialised value(s)" Valgrind warning
* [ARROW-8980](https://issues.apache.org/jira/browse/ARROW-8980) - [Python] Metadata grows exponentially when using schema from disk
* [ARROW-8982](https://issues.apache.org/jira/browse/ARROW-8982) - [CI] Remove allow\_failures for s390x in TravisCI
* [ARROW-8986](https://issues.apache.org/jira/browse/ARROW-8986) - [Archery][ursabot] Fix benchmark diff checkout of origin/master
* [ARROW-9000](https://issues.apache.org/jira/browse/ARROW-9000) - [Java] build crashes with JDK14
* [ARROW-9009](https://issues.apache.org/jira/browse/ARROW-9009) - [C++][Dataset] ARROW:schema should be removed from schema's metadata when reading Parquet files
* [ARROW-9013](https://issues.apache.org/jira/browse/ARROW-9013) - [C++] Validate enum-style CMake options
* [ARROW-9020](https://issues.apache.org/jira/browse/ARROW-9020) - [Python] read\_json won't respect explicit\_schema in parse\_options
* [ARROW-9024](https://issues.apache.org/jira/browse/ARROW-9024) - [C++/Python] Install anaconda-client in conda-clean job
* [ARROW-9026](https://issues.apache.org/jira/browse/ARROW-9026) - [C++/Python] Force package removal from arrow-nightlies conda repository
* [ARROW-9037](https://issues.apache.org/jira/browse/ARROW-9037) - [C++][C] unable to import array with null count == -1 (which could be exported)
* [ARROW-9040](https://issues.apache.org/jira/browse/ARROW-9040) - [Python][Parquet]"\_ParquetDatasetV2" fail to read with columns and use\_pandas\_metadata=True
* [ARROW-9057](https://issues.apache.org/jira/browse/ARROW-9057) - [Rust] Projection should work on InMemoryScan without error
* [ARROW-9059](https://issues.apache.org/jira/browse/ARROW-9059) - [Rust] Documentation for slicing array data has the wrong sign
* [ARROW-9066](https://issues.apache.org/jira/browse/ARROW-9066) - [Python] Raise correct error in isnull()
* [ARROW-9071](https://issues.apache.org/jira/browse/ARROW-9071) - [C++] MakeArrayOfNull makes invalid ListArray
* [ARROW-9077](https://issues.apache.org/jira/browse/ARROW-9077) - [C++] Fix aggregate/scalar-compare benchmark null\_percent calculation
* [ARROW-9080](https://issues.apache.org/jira/browse/ARROW-9080) - [C++] arrow::AllocateBuffer returns a Result<unique\_ptr<Buffer\>\>
* [ARROW-9082](https://issues.apache.org/jira/browse/ARROW-9082) - [Rust] - Stream reader fail when steam not ended with (optional) 0xFFFFFFFF 0x00000000"
* [ARROW-9084](https://issues.apache.org/jira/browse/ARROW-9084) - [C++] CMake is unable to find zstd target when ZSTD\_SOURCE=SYSTEM
* [ARROW-9085](https://issues.apache.org/jira/browse/ARROW-9085) - [C++][CI] Appveyor CI test failures
* [ARROW-9087](https://issues.apache.org/jira/browse/ARROW-9087) - [C++] Missing HDFS options parsing
* [ARROW-9098](https://issues.apache.org/jira/browse/ARROW-9098) - RecordBatch::ToStructArray cannot handle record batches with 0 column
* [ARROW-9105](https://issues.apache.org/jira/browse/ARROW-9105) - [C++] ParquetFileFragment scanning doesn't handle filter on partition field
* [ARROW-9120](https://issues.apache.org/jira/browse/ARROW-9120) - [C++] Lint and Format C++ files with "codegen" in file name
* [ARROW-9121](https://issues.apache.org/jira/browse/ARROW-9121) - [C++] Do not wipe the filesystem when path is empty
* [ARROW-9122](https://issues.apache.org/jira/browse/ARROW-9122) - [C++] Adapt ascii\_lower/ascii\_upper bulk transforms to work on sliced arrays
* [ARROW-9126](https://issues.apache.org/jira/browse/ARROW-9126) - [C++] Trimmed Boost bundle fails to build on Windows
* [ARROW-9127](https://issues.apache.org/jira/browse/ARROW-9127) - [Rust] Update thrift library dependencies
* [ARROW-9134](https://issues.apache.org/jira/browse/ARROW-9134) - [Python] Parquet partitioning degrades Int32 to float64
* [ARROW-9141](https://issues.apache.org/jira/browse/ARROW-9141) - [R] Update cross-package documentation links
* [ARROW-9142](https://issues.apache.org/jira/browse/ARROW-9142) - [C++] random::RandomArrayGenerator::Boolean "probability" misdocumented / incorrect
* [ARROW-9143](https://issues.apache.org/jira/browse/ARROW-9143) - [C++] RecordBatch::Slice erroneously sets non-nullable field's internal null\_count to unknown
* [ARROW-9146](https://issues.apache.org/jira/browse/ARROW-9146) - [C++][Dataset] Scanning a Fragment with a filter + mismatching schema shouldn't abort
* [ARROW-9151](https://issues.apache.org/jira/browse/ARROW-9151) - [R][CI] Fix Rtools 4.0 build: pacman sync
* [ARROW-9160](https://issues.apache.org/jira/browse/ARROW-9160) - [C++] Implement string/binary contains for exact matches
* [ARROW-9174](https://issues.apache.org/jira/browse/ARROW-9174) - [Go] Tests panic with 386 (x86) builds
* [ARROW-9183](https://issues.apache.org/jira/browse/ARROW-9183) - [C++] Failed to build arrow-cpp with gcc 4.9.2
* [ARROW-9184](https://issues.apache.org/jira/browse/ARROW-9184) - [Rust][Datafusion] table scan without projection should return all columns
* [ARROW-9194](https://issues.apache.org/jira/browse/ARROW-9194) - [C++] Array::GetScalar not implemented for decimal type
* [ARROW-9195](https://issues.apache.org/jira/browse/ARROW-9195) - [Java] Wrong usage of Unsafe.get from bytearray in ByteFunctionsHelper class
* [ARROW-9209](https://issues.apache.org/jira/browse/ARROW-9209) - [C++] Benchmarks fail to build ARROW\_IPC=OFF and ARROW\_BUILD\_TESTS=OFF
* [ARROW-9219](https://issues.apache.org/jira/browse/ARROW-9219) - [R] coerce\_timestamps in Parquet write options does not work
* [ARROW-9221](https://issues.apache.org/jira/browse/ARROW-9221) - ArrowBuf\#setBytes(int, ByteBuffer) doesn't check the byte buffer's endianness
* [ARROW-9223](https://issues.apache.org/jira/browse/ARROW-9223) - [Python] Fix to\_pandas() export for timestamps within structs
* [ARROW-9230](https://issues.apache.org/jira/browse/ARROW-9230) - [FlightRPC][Python] flight.connect() doesn't pass through all arguments
* [ARROW-9233](https://issues.apache.org/jira/browse/ARROW-9233) - [C++] is\_null on NullArray should be true for all values
* [ARROW-9236](https://issues.apache.org/jira/browse/ARROW-9236) - [Rust] CSV WriterBuilder never writes header
* [ARROW-9237](https://issues.apache.org/jira/browse/ARROW-9237) - [R] 0.17 install on Arch Linux
* [ARROW-9238](https://issues.apache.org/jira/browse/ARROW-9238) - [C++][CI] A few test coverages of round-robin in ipc and flight
* [ARROW-9252](https://issues.apache.org/jira/browse/ARROW-9252) - [Integration] GitHub Actions integration test job does not test against "gold" 0.14.1 files in apache/arrow-testing
* [ARROW-9260](https://issues.apache.org/jira/browse/ARROW-9260) - [CI] "ARM64v8 Ubuntu 20.04 C++" fails
* [ARROW-9260](https://issues.apache.org/jira/browse/ARROW-9260) - [CI] "ARM64v8 Ubuntu 20.04 C++" fails
* [ARROW-9261](https://issues.apache.org/jira/browse/ARROW-9261) - [Python][Packaging] S3FileSystem curl errors in manylinux wheels
* [ARROW-9274](https://issues.apache.org/jira/browse/ARROW-9274) - [Rust] [Integration Testing] Read i64 from json files as strings
* [ARROW-9282](https://issues.apache.org/jira/browse/ARROW-9282) - [R] Remove usage of \_EXTPTR\_PTR
* [ARROW-9284](https://issues.apache.org/jira/browse/ARROW-9284) - [Java] getMinorTypeForArrowType returns sparse minor type for dense union types
* [ARROW-9288](https://issues.apache.org/jira/browse/ARROW-9288) - [C++][Dataset] Discovery of partition field as dictionary type segfaulting with HivePartitioning
* [ARROW-9297](https://issues.apache.org/jira/browse/ARROW-9297) - [C++][Dataset] Dataset scanner cannot handle large binary column (\> 2 GB)
* [ARROW-9298](https://issues.apache.org/jira/browse/ARROW-9298) - [C++] Fix crashes on invalid input (OSS-Fuzz)
* [ARROW-9303](https://issues.apache.org/jira/browse/ARROW-9303) - [R] Linux static build should always bundle dependencies
* [ARROW-9305](https://issues.apache.org/jira/browse/ARROW-9305) - [Python] Dependency load failure in Windows wheel build
* [ARROW-9315](https://issues.apache.org/jira/browse/ARROW-9315) - [Java] Fix the failure of testAllocationManagerType
* [ARROW-9317](https://issues.apache.org/jira/browse/ARROW-9317) - [Java]  A few testcases for arrow-memory
* [ARROW-9326](https://issues.apache.org/jira/browse/ARROW-9326) - [Python] Setuptools 49.1.0 appears to break our Python 3.6 builds
* [ARROW-9326](https://issues.apache.org/jira/browse/ARROW-9326) - [Python] Setuptools 49.1.0 appears to break our Python 3.6 builds
* [ARROW-9326](https://issues.apache.org/jira/browse/ARROW-9326) - [Python] Setuptools 49.1.0 appears to break our Python 3.6 builds
* [ARROW-9330](https://issues.apache.org/jira/browse/ARROW-9330) - [C++] Fix crashes on corrupt IPC input (OSS-Fuzz)
* [ARROW-9334](https://issues.apache.org/jira/browse/ARROW-9334) - [Dev][Archery] Push ancestor docker images
* [ARROW-9336](https://issues.apache.org/jira/browse/ARROW-9336) - [Ruby] Creating RecordBatch with structs missing keys results in a malformed table
* [ARROW-9343](https://issues.apache.org/jira/browse/ARROW-9343) - [C++][Gandiva] CastINT/Float functions from string should handle leading/trailing white spaces
* [ARROW-9347](https://issues.apache.org/jira/browse/ARROW-9347) - [Python] Tests fail with latest fsspec
* [ARROW-9350](https://issues.apache.org/jira/browse/ARROW-9350) - [C++][CI] Nightly valgrind job failures
* [ARROW-9351](https://issues.apache.org/jira/browse/ARROW-9351) - [C++][CI] Nightly test-ubuntu-18.04-cpp-cmake32 fails
* [ARROW-9353](https://issues.apache.org/jira/browse/ARROW-9353) - [Python][CI] Nightly dask integration jobs fail
* [ARROW-9354](https://issues.apache.org/jira/browse/ARROW-9354) - [C++] Turbodbc latest fails to build in the integration tests
* [ARROW-9355](https://issues.apache.org/jira/browse/ARROW-9355) - [R] Fix -Wimplicit-int-float-conversion
* [ARROW-9360](https://issues.apache.org/jira/browse/ARROW-9360) - [CI][Crossbow] Nightly homebrew-cpp job times out
* [ARROW-9363](https://issues.apache.org/jira/browse/ARROW-9363) - [C++][Dataset] ParquetDatasetFactory schema: pandas metadata is lost
* [ARROW-9368](https://issues.apache.org/jira/browse/ARROW-9368) - [Python] Rename predicate argument to filter in split\_by\_row\_group()
* [ARROW-9373](https://issues.apache.org/jira/browse/ARROW-9373) - [C++] Fix Parquet crash on invalid input (OSS-Fuzz)
* [ARROW-9380](https://issues.apache.org/jira/browse/ARROW-9380) - [C++] Segfaults in compute::CallFunction
* [ARROW-9384](https://issues.apache.org/jira/browse/ARROW-9384) - [C++] Out-of-memory on invalid IPC input (OSS-Fuzz)
* [ARROW-9385](https://issues.apache.org/jira/browse/ARROW-9385) - [Python] [CI] jpype integration failure
* [ARROW-9389](https://issues.apache.org/jira/browse/ARROW-9389) - [C++] Can't call isin/match through CallFunction
* [ARROW-9397](https://issues.apache.org/jira/browse/ARROW-9397) - [R] Pass CC/CXX to cmake when building libarrow in Linux build
* [ARROW-9408](https://issues.apache.org/jira/browse/ARROW-9408) - [Integration] Tests do not run in Windows due to numpy 64-bit errors
* [ARROW-9409](https://issues.apache.org/jira/browse/ARROW-9409) - [CI][Crossbow] Nightly conda-r fails
* [ARROW-9410](https://issues.apache.org/jira/browse/ARROW-9410) - [CI][Crossbow] Fix homebrew-cpp again
* [ARROW-9413](https://issues.apache.org/jira/browse/ARROW-9413) - [Rust] Fix clippy lint on master
* [ARROW-9415](https://issues.apache.org/jira/browse/ARROW-9415) - [C++] Arrow does not compile on Power9
* [ARROW-9416](https://issues.apache.org/jira/browse/ARROW-9416) - [Go] Add test cases for some datatypes
* [ARROW-9417](https://issues.apache.org/jira/browse/ARROW-9417) - [C++][IPC] size in message written in native endian
* [ARROW-9418](https://issues.apache.org/jira/browse/ARROW-9418) - [R] nyc-taxi Parquet files not downloaded in binary mode on Windows
* [ARROW-9419](https://issues.apache.org/jira/browse/ARROW-9419) - [C++] Test that "fill\_null" function works with sliced inputs, expand tests
* [ARROW-9428](https://issues.apache.org/jira/browse/ARROW-9428) - [C++] Update documentation for buffer allocation functions
* [ARROW-9436](https://issues.apache.org/jira/browse/ARROW-9436) - [C++][CI] Valgrind errors in fill\_null kernel tests
* [ARROW-9438](https://issues.apache.org/jira/browse/ARROW-9438) - [CI] Spark integration tests are failing
* [ARROW-9439](https://issues.apache.org/jira/browse/ARROW-9439) - [C++] Fix crash on invalid IPC input (OSS-Fuzz)
* [ARROW-9440](https://issues.apache.org/jira/browse/ARROW-9440) - [Python] Expose Fill Null Compute Kernel in PyArrow
* [ARROW-9443](https://issues.apache.org/jira/browse/ARROW-9443) - [C++] Bundled bz2 build should only build libbz2
* [ARROW-9448](https://issues.apache.org/jira/browse/ARROW-9448) - [Java] Circular initialization between ArrowBuf and BaseAllocator leads to null HistoricalLog for empty buffer
* [ARROW-9449](https://issues.apache.org/jira/browse/ARROW-9449) - [R] Strip arrow.so
* [ARROW-9450](https://issues.apache.org/jira/browse/ARROW-9450) - [Python] "pytest pyarrow" takes over 10 seconds to collect tests and start executing
* [ARROW-9456](https://issues.apache.org/jira/browse/ARROW-9456) - [Python] Dataset segfault when not importing pyarrow.parquet
* [ARROW-9458](https://issues.apache.org/jira/browse/ARROW-9458) - [Python] Dataset Scanner is single-threaded only
* [ARROW-9460](https://issues.apache.org/jira/browse/ARROW-9460) - [C++] BinaryContainsExact doesn't cope with double characters in the pattern
* [ARROW-9461](https://issues.apache.org/jira/browse/ARROW-9461) - [Rust] Reading Date32 and Date64 errors - they are incorrectly converted to RecordBatch
* [ARROW-9476](https://issues.apache.org/jira/browse/ARROW-9476) - [C++][Dataset] HivePartitioning discovery with dictionary types fails for multiple fields
* [ARROW-9486](https://issues.apache.org/jira/browse/ARROW-9486) - [C++][Dataset] Support implicit casting InExpression::set\_ to dict
* [ARROW-9497](https://issues.apache.org/jira/browse/ARROW-9497) - [C++][Parquet] Fix failure caused by malformed repetition/definition levels
* [ARROW-9499](https://issues.apache.org/jira/browse/ARROW-9499) - [C++] AdaptiveIntBuilder::AppendNull does not increment the null count
* [ARROW-9500](https://issues.apache.org/jira/browse/ARROW-9500) - [C++] Fix segfault with std::to\_string in -O3 builds on gcc 7.5.0
* [ARROW-9501](https://issues.apache.org/jira/browse/ARROW-9501) - [C++][Gandiva] Add logic in timestampdiff() when end date is last day of a month
* [ARROW-9503](https://issues.apache.org/jira/browse/ARROW-9503) - [Rust] Comparison sliced arrays is wrong
* [ARROW-9504](https://issues.apache.org/jira/browse/ARROW-9504) - [Python] Segmentation fault on ChunkedArray.take
* [ARROW-9506](https://issues.apache.org/jira/browse/ARROW-9506) - [Packaging][Python] Fix macOS wheel build failures
* [ARROW-9512](https://issues.apache.org/jira/browse/ARROW-9512) - [C++] Variadic template unpack inside lambda doesn't compile with gcc
* [ARROW-9524](https://issues.apache.org/jira/browse/ARROW-9524) - [CI][Gandiva] C++ unit test arrow-ipc-read-write failing in gandiva nightly build
* [ARROW-9527](https://issues.apache.org/jira/browse/ARROW-9527) - [Rust] Remove un-needed dev-dependencies
* [ARROW-10126](https://issues.apache.org/jira/browse/ARROW-10126) - [Python] Impossible to import pyarrow module in python. Generates this "ImportError: DLL load failed: The specified procedure could not be found."
* [PARQUET-1839](https://issues.apache.org/jira/browse/PARQUET-1839) - [C++] values\_read not updated in ReadBatchSpaced
* [PARQUET-1857](https://issues.apache.org/jira/browse/PARQUET-1857) - [C++][Parquet] ParquetFileReader unable to read files with more than 32767 row groups
* [PARQUET-1865](https://issues.apache.org/jira/browse/PARQUET-1865) - [C++] Failure from C++17 feature used in parquet/encoding\_benchmark.cc
* [PARQUET-1877](https://issues.apache.org/jira/browse/PARQUET-1877) - [C++] Reconcile container size with string size for memory issues
* [PARQUET-1882](https://issues.apache.org/jira/browse/PARQUET-1882) - [C++] Writing an all-null column and then reading it with buffered\_stream aborts the process


## New Features and Improvements

* [ARROW-300](https://issues.apache.org/jira/browse/ARROW-300) - [Format] Add body buffer compression option to IPC message protocol using LZ4 or ZSTD
* [ARROW-842](https://issues.apache.org/jira/browse/ARROW-842) - [Python] Handle more kinds of null sentinel objects from pandas 0.x
* [ARROW-971](https://issues.apache.org/jira/browse/ARROW-971) - [C++/Python] Implement Array.isvalid/notnull/isnull as scalar functions
* [ARROW-974](https://issues.apache.org/jira/browse/ARROW-974) - [Website] Add Use Cases section to the website
* [ARROW-1277](https://issues.apache.org/jira/browse/ARROW-1277) - Completing integration tests for major implemented data types
* [ARROW-1567](https://issues.apache.org/jira/browse/ARROW-1567) - [C++] Implement "fill null" kernels that replace null values with some scalar replacement value
* [ARROW-1570](https://issues.apache.org/jira/browse/ARROW-1570) - [C++] Define API for creating a kernel instance from function of scalar input and output with a particular signature
* [ARROW-1682](https://issues.apache.org/jira/browse/ARROW-1682) - [Python] Add documentation / example for reading a directory of Parquet files on S3
* [ARROW-1796](https://issues.apache.org/jira/browse/ARROW-1796) - [Python] RowGroup filtering on file level
* [ARROW-2260](https://issues.apache.org/jira/browse/ARROW-2260) - [C++][Plasma] plasma\_store should show usage
* [ARROW-2444](https://issues.apache.org/jira/browse/ARROW-2444) - [Python][C++] Better handle reading empty parquet files
* [ARROW-2702](https://issues.apache.org/jira/browse/ARROW-2702) - [Python] Examine usages of Invalid and TypeError errors in numpy\_to\_arrow.cc to see if we are using the right error type in each instance
* [ARROW-2714](https://issues.apache.org/jira/browse/ARROW-2714) - [C++/Python] Variable step size slicing for arrays
* [ARROW-2912](https://issues.apache.org/jira/browse/ARROW-2912) - [Website] Build more detailed Community landing page a la Apache Spark
* [ARROW-3089](https://issues.apache.org/jira/browse/ARROW-3089) - [Rust] Add ArrayBuilder for different Arrow arrays
* [ARROW-3134](https://issues.apache.org/jira/browse/ARROW-3134) - [C++] Implement n-ary iterator for a collection of chunked arrays with possibly different chunking layouts
* [ARROW-3154](https://issues.apache.org/jira/browse/ARROW-3154) - [Python][C++] Document how to write \_metadata, \_common\_metadata files with Parquet datasets
* [ARROW-3244](https://issues.apache.org/jira/browse/ARROW-3244) - [Python] Multi-file parquet loading without scan
* [ARROW-3275](https://issues.apache.org/jira/browse/ARROW-3275) - [Python] Add documentation about inspecting Parquet file metadata
* [ARROW-3308](https://issues.apache.org/jira/browse/ARROW-3308) - [R] Convert R character vector with data exceeding 2GB to Large type
* [ARROW-3317](https://issues.apache.org/jira/browse/ARROW-3317) - [R] Test/support conversions from data.frame with a single character column exceeding 2GB capacity of BinaryArray
* [ARROW-3446](https://issues.apache.org/jira/browse/ARROW-3446) - [R] Document mapping of Arrow <-\> R types
* [ARROW-3509](https://issues.apache.org/jira/browse/ARROW-3509) - [C++] Inconsistent child accessor naming
* [ARROW-3520](https://issues.apache.org/jira/browse/ARROW-3520) - [C++] Implement List Flatten kernel
* [ARROW-3688](https://issues.apache.org/jira/browse/ARROW-3688) - [Rust] Implement PrimitiveArrayBuilder<T\>.push\_values
* [ARROW-3764](https://issues.apache.org/jira/browse/ARROW-3764) - [C++] Port Python "ParquetDataset" business logic to C++
* [ARROW-3827](https://issues.apache.org/jira/browse/ARROW-3827) - [Rust] Implement UnionArray
* [ARROW-4022](https://issues.apache.org/jira/browse/ARROW-4022) - [C++] Promote Datum variant out of compute namespace
* [ARROW-4221](https://issues.apache.org/jira/browse/ARROW-4221) - [Format] Add canonical flag in COO sparse index
* [ARROW-4390](https://issues.apache.org/jira/browse/ARROW-4390) - [R] Serialize "labeled" metadata in Feather files, IPC messages
* [ARROW-4412](https://issues.apache.org/jira/browse/ARROW-4412) - [DOCUMENTATION] Add explicit version numbers to the arrow specification documents.
* [ARROW-4427](https://issues.apache.org/jira/browse/ARROW-4427) - [Doc] Move Confluence Wiki pages to the Sphinx docs
* [ARROW-4429](https://issues.apache.org/jira/browse/ARROW-4429) - [Doc] Add git rebase tips to the 'Contributing' page in the developer docs
* [ARROW-4526](https://issues.apache.org/jira/browse/ARROW-4526) - [Java] Remove Netty references from ArrowBuf and move Allocator out of vector package
* [ARROW-5035](https://issues.apache.org/jira/browse/ARROW-5035) - [C\#] ArrowBuffer.Builder<bool\> is broken
* [ARROW-5082](https://issues.apache.org/jira/browse/ARROW-5082) - [Python][Packaging] Reduce size of macOS and manylinux1 wheels
* [ARROW-5143](https://issues.apache.org/jira/browse/ARROW-5143) - [Flight] Enable integration testing of batches with dictionaries
* [ARROW-5279](https://issues.apache.org/jira/browse/ARROW-5279) - [C++] Support reading delta dictionaries in IPC streams
* [ARROW-5377](https://issues.apache.org/jira/browse/ARROW-5377) - [C++] Make IpcPayload public and add GetPayloadSize
* [ARROW-5489](https://issues.apache.org/jira/browse/ARROW-5489) - [C++] Normalize kernels and ChunkedArray behavior
* [ARROW-5548](https://issues.apache.org/jira/browse/ARROW-5548) - [Documentation] http://arrow.apache.org/docs/latest/ is not latest
* [ARROW-5649](https://issues.apache.org/jira/browse/ARROW-5649) - [Integration][C++] Create round trip integration test for extension types
* [ARROW-5708](https://issues.apache.org/jira/browse/ARROW-5708) - [C\#] Null support for BooleanArray
* [ARROW-5760](https://issues.apache.org/jira/browse/ARROW-5760) - [C++] Optimize Take implementation
* [ARROW-5854](https://issues.apache.org/jira/browse/ARROW-5854) - [Python] Expose compare kernels on Array class
* [ARROW-6052](https://issues.apache.org/jira/browse/ARROW-6052) - [C++] Divide up arrow/array.h,cc into files in arrow/array/ similar to builder files
* [ARROW-6110](https://issues.apache.org/jira/browse/ARROW-6110) - [Java] Support LargeList Type and add integration test with C++
* [ARROW-6111](https://issues.apache.org/jira/browse/ARROW-6111) - [Java] Support LargeVarChar and LargeBinary types and add integration test with C++
* [ARROW-6439](https://issues.apache.org/jira/browse/ARROW-6439) - [R] Implement S3 file-system interface in R
* [ARROW-6456](https://issues.apache.org/jira/browse/ARROW-6456) - [C++] Possible to reduce object code generated in compute/kernels/take.cc?
* [ARROW-6501](https://issues.apache.org/jira/browse/ARROW-6501) - [C++] Remove non\_zero\_length field from SparseIndex
* [ARROW-6521](https://issues.apache.org/jira/browse/ARROW-6521) - [C++] Add function to arrow:: namespace that returns the current ABI version
* [ARROW-6543](https://issues.apache.org/jira/browse/ARROW-6543) - [R] Support LargeBinary and LargeString types
* [ARROW-6602](https://issues.apache.org/jira/browse/ARROW-6602) - [Doc] Add feature / implementation matrix
* [ARROW-6603](https://issues.apache.org/jira/browse/ARROW-6603) - [C\#] ArrayBuilder API to support writing nulls
* [ARROW-6645](https://issues.apache.org/jira/browse/ARROW-6645) - [Python] Faster boundschecking of dictionary indices when converting to Categorical
* [ARROW-6689](https://issues.apache.org/jira/browse/ARROW-6689) - [Rust] [DataFusion] Query execution enhancements for 1.0.0 release
* [ARROW-6691](https://issues.apache.org/jira/browse/ARROW-6691) - [Rust] [DataFusion] Use tokio and Futures instead of spawning threads
* [ARROW-6775](https://issues.apache.org/jira/browse/ARROW-6775) - [C++] [Python] Proposal for several Array utility functions
* [ARROW-6776](https://issues.apache.org/jira/browse/ARROW-6776) - [Python] Need a lite version of pyarrow
* [ARROW-6800](https://issues.apache.org/jira/browse/ARROW-6800) - [C++] Add CMake option to build libraries targeting a C++14 or C++17 toolchain environment
* [ARROW-6839](https://issues.apache.org/jira/browse/ARROW-6839) - [Java] Add APIs to read and write "custom\_metadata" field of IPC file footer
* [ARROW-6856](https://issues.apache.org/jira/browse/ARROW-6856) - [C++] Use ArrayData instead of Array for ArrayData::dictionary
* [ARROW-6917](https://issues.apache.org/jira/browse/ARROW-6917) - ARROW-6917: [Archery][Release] Add support for JIRA curation, changelog generation and commit cherry-picking for maintenance releases
* [ARROW-6945](https://issues.apache.org/jira/browse/ARROW-6945) - [Rust] Enable integration tests
* [ARROW-6959](https://issues.apache.org/jira/browse/ARROW-6959) - [C++] Clarify what signatures are preferred for compute kernels
* [ARROW-6978](https://issues.apache.org/jira/browse/ARROW-6978) - [R] Add bindings for sum and mean compute kernels
* [ARROW-6979](https://issues.apache.org/jira/browse/ARROW-6979) - [R] Enable jemalloc in autobrew formula
* [ARROW-7009](https://issues.apache.org/jira/browse/ARROW-7009) - [C++] Refactor filter/take kernels to use Datum instead of overloads
* [ARROW-7010](https://issues.apache.org/jira/browse/ARROW-7010) - [C++] Support lossy casts from decimal128 to float32 and float64/double
* [ARROW-7011](https://issues.apache.org/jira/browse/ARROW-7011) - [C++] Implement casts from float/double to decimal128
* [ARROW-7012](https://issues.apache.org/jira/browse/ARROW-7012) - [C++] Clarify ChunkedArray chunking strategy and policy
* [ARROW-7068](https://issues.apache.org/jira/browse/ARROW-7068) - [C++] Expose the offsets of a ListArray as a Int32Array
* [ARROW-7075](https://issues.apache.org/jira/browse/ARROW-7075) - [C++] Boolean kernels should not allocate in Call()
* [ARROW-7175](https://issues.apache.org/jira/browse/ARROW-7175) - [Website] Add a security page to track when vulnerabilities are patched
* [ARROW-7229](https://issues.apache.org/jira/browse/ARROW-7229) - [C++] Unify ConcatenateTables APIs
* [ARROW-7230](https://issues.apache.org/jira/browse/ARROW-7230) - [C++] Use vendored std::optional instead of boost::optional in Gandiva
* [ARROW-7237](https://issues.apache.org/jira/browse/ARROW-7237) - [C++] Add Result<T\> to APIs to arrow/json
* [ARROW-7243](https://issues.apache.org/jira/browse/ARROW-7243) - [Docs] Add common "implementation status" table to the README of each native language implementation, as well as top level README
* [ARROW-7285](https://issues.apache.org/jira/browse/ARROW-7285) - [C++] ensure C++ implementation meets clarified dictionary spec
* [ARROW-7300](https://issues.apache.org/jira/browse/ARROW-7300) - [C++][Gandiva] Implement functions to cast from strings to integers/floats
* [ARROW-7313](https://issues.apache.org/jira/browse/ARROW-7313) - [C++] Add function for retrieving a scalar from an array slot
* [ARROW-7371](https://issues.apache.org/jira/browse/ARROW-7371) - [GLib] Add Datasets binding
* [ARROW-7375](https://issues.apache.org/jira/browse/ARROW-7375) - [Python] Expose C++ MakeArrayOfNull
* [ARROW-7391](https://issues.apache.org/jira/browse/ARROW-7391) - [Python] Remove unnecessary classes from the binding layer
* [ARROW-7495](https://issues.apache.org/jira/browse/ARROW-7495) - [Java] Remove "empty" concept from ArrowBuf, replace with custom referencemanager
* [ARROW-7605](https://issues.apache.org/jira/browse/ARROW-7605) - [C++] Create and install static library containing all dependencies built by Arrow
* [ARROW-7607](https://issues.apache.org/jira/browse/ARROW-7607) - [C++] Add to cpp/examples minimal examples of using Arrow as a dependency of another CMake project
* [ARROW-7673](https://issues.apache.org/jira/browse/ARROW-7673) - [C++][Dataset] Revisit File discovery failure mode
* [ARROW-7676](https://issues.apache.org/jira/browse/ARROW-7676) - [Packaging][Python] Ensure that the static libraries are not built in the wheel scripts
* [ARROW-7699](https://issues.apache.org/jira/browse/ARROW-7699) - [Java] Support concating dense union vectors in batch
* [ARROW-7705](https://issues.apache.org/jira/browse/ARROW-7705) - [Rust] Initial sort implementation
* [ARROW-7717](https://issues.apache.org/jira/browse/ARROW-7717) - [CI] Have nightly integration test for Spark's latest release
* [ARROW-7759](https://issues.apache.org/jira/browse/ARROW-7759) - [C++][Dataset] Add CsvFileFormat for CSV support
* [ARROW-7778](https://issues.apache.org/jira/browse/ARROW-7778) - [C++] Support nested dictionaries in JSON integration format
* [ARROW-7784](https://issues.apache.org/jira/browse/ARROW-7784) - [C++] diff.cc is extremely slow to compile
* [ARROW-7801](https://issues.apache.org/jira/browse/ARROW-7801) - [Developer] Add issue\_comment workflow to fix lint/style/codegen
* [ARROW-7803](https://issues.apache.org/jira/browse/ARROW-7803) - [R][CI] Autobrew/homebrew tests should not always install from master
* [ARROW-7831](https://issues.apache.org/jira/browse/ARROW-7831) - [Java] unnecessary buffer allocation when calling splitAndTransferTo on variable width vectors
* [ARROW-7831](https://issues.apache.org/jira/browse/ARROW-7831) - [Java] unnecessary buffer allocation when calling splitAndTransferTo on variable width vectors
* [ARROW-7902](https://issues.apache.org/jira/browse/ARROW-7902) - [Integration] Unskip nested dictionary integration tests
* [ARROW-7910](https://issues.apache.org/jira/browse/ARROW-7910) - [C++] Provide function to query page size portably
* [ARROW-7924](https://issues.apache.org/jira/browse/ARROW-7924) - [Rust] Add sort for float types
* [ARROW-7950](https://issues.apache.org/jira/browse/ARROW-7950) - [Python] When initializing pandas API shim, inform user if their installed pandas version is too old
* [ARROW-7955](https://issues.apache.org/jira/browse/ARROW-7955) - [Java] Support large buffer for file/stream IPC
* [ARROW-8020](https://issues.apache.org/jira/browse/ARROW-8020) - [Java] Implement vector validate functionality
* [ARROW-8023](https://issues.apache.org/jira/browse/ARROW-8023) - [Website] Write a blog post about the C data interface
* [ARROW-8025](https://issues.apache.org/jira/browse/ARROW-8025) - [C++] Implement cast to Binary and FixedSizeBinary
* [ARROW-8025](https://issues.apache.org/jira/browse/ARROW-8025) - [C++] Implement cast to Binary and FixedSizeBinary
* [ARROW-8046](https://issues.apache.org/jira/browse/ARROW-8046) - [Developer][Integration] Makefile.docker's target names are broken
* [ARROW-8062](https://issues.apache.org/jira/browse/ARROW-8062) - [C++][Dataset] Parquet Dataset factory from a \_metadata/\_common\_metadata file
* [ARROW-8065](https://issues.apache.org/jira/browse/ARROW-8065) - [C++][Dataset] Untangle Dataset, Fragment and ScanOptions
* [ARROW-8074](https://issues.apache.org/jira/browse/ARROW-8074) - [C++][Dataset] Support for file-like objects (buffers) in FileSystemDataset?
* [ARROW-8108](https://issues.apache.org/jira/browse/ARROW-8108) - [Java] Extract a common interface for dictionary encoders
* [ARROW-8111](https://issues.apache.org/jira/browse/ARROW-8111) - [C++][CSV] Support MM/DD/YYYY date format
* [ARROW-8114](https://issues.apache.org/jira/browse/ARROW-8114) - [Java][Integration] Enable custom\_metadata integration test
* [ARROW-8121](https://issues.apache.org/jira/browse/ARROW-8121) - [Java] Enhance code style checking for Java code (add space after commas, semi-colons and type casts)
* [ARROW-8149](https://issues.apache.org/jira/browse/ARROW-8149) - [C++/Python] Enable CUDA Support in conda recipes
* [ARROW-8157](https://issues.apache.org/jira/browse/ARROW-8157) - [C++][Gandiva] Support building with LLVM 9
* [ARROW-8162](https://issues.apache.org/jira/browse/ARROW-8162) - [Format][Python] Add serialization for CSF sparse tensors
* [ARROW-8169](https://issues.apache.org/jira/browse/ARROW-8169) - [Java] Improve the performance of JDBC adapter by allocating memory proactively
* [ARROW-8171](https://issues.apache.org/jira/browse/ARROW-8171) - Consider pre-allocating memory for fix-width vector in Avro adapter iterator
* [ARROW-8190](https://issues.apache.org/jira/browse/ARROW-8190) - [C++][Flight] Allow setting IpcWriteOptions and IpcReadOptions in Flight IPC message reader and writer classes
* [ARROW-8229](https://issues.apache.org/jira/browse/ARROW-8229) - [Java] Move ArrowBuf into the Arrow package
* [ARROW-8230](https://issues.apache.org/jira/browse/ARROW-8230) - [Java] Move Netty memory manager into a separate module
* [ARROW-8261](https://issues.apache.org/jira/browse/ARROW-8261) - [Rust] [DataFusion] LogicalPlanBuilder.limit() should take a literal argument
* [ARROW-8263](https://issues.apache.org/jira/browse/ARROW-8263) - [Rust] [DataFusion] Add documentation for supported SQL functions
* [ARROW-8281](https://issues.apache.org/jira/browse/ARROW-8281) - [R] Name collision of arrow.dll on Windows conda
* [ARROW-8283](https://issues.apache.org/jira/browse/ARROW-8283) - [Python][Dataset] Non-existent files are silently dropped in pa.dataset.FileSystemDataset
* [ARROW-8287](https://issues.apache.org/jira/browse/ARROW-8287) - [Rust] Arrow examples should use utility to print results
* [ARROW-8293](https://issues.apache.org/jira/browse/ARROW-8293) - [Python] Run flake8 on python/examples also
* [ARROW-8297](https://issues.apache.org/jira/browse/ARROW-8297) - [FlightRPC][C++] Implement Flight DoExchange for C++
* [ARROW-8301](https://issues.apache.org/jira/browse/ARROW-8301) - [R] Handle ChunkedArray and Table in C data interface
* [ARROW-8312](https://issues.apache.org/jira/browse/ARROW-8312) - [Java][Gandiva] improve IN expression support
* [ARROW-8314](https://issues.apache.org/jira/browse/ARROW-8314) - [Python] Provide a method to select a subset of columns of a Table
* [ARROW-8318](https://issues.apache.org/jira/browse/ARROW-8318) - [C++][Dataset] Dataset should instantiate Fragment
* [ARROW-8399](https://issues.apache.org/jira/browse/ARROW-8399) - [Rust] Extend memory alignments to include other architectures
* [ARROW-8413](https://issues.apache.org/jira/browse/ARROW-8413) - [C++] Refactor DefLevelsToBitmap
* [ARROW-8422](https://issues.apache.org/jira/browse/ARROW-8422) - [Rust] [Parquet] Implement function to convert Arrow schema to Parquet schema
* [ARROW-8430](https://issues.apache.org/jira/browse/ARROW-8430) - [CI] Configure self-hosted runners for Github Actions
* [ARROW-8434](https://issues.apache.org/jira/browse/ARROW-8434) - [C++] Ipc RecordBatchFileReader deserializes the Schema multiple times
* [ARROW-8440](https://issues.apache.org/jira/browse/ARROW-8440) - [C++] Refine simd header files
* [ARROW-8443](https://issues.apache.org/jira/browse/ARROW-8443) - [Gandiva][C++] Fix round/truncate to no-op for special cases
* [ARROW-8447](https://issues.apache.org/jira/browse/ARROW-8447) - [C++][Dataset] Ensure Scanner::ToTable preserve ordering of ScanTasks
* [ARROW-8456](https://issues.apache.org/jira/browse/ARROW-8456) - [Release] Add python script to help curating JIRA
* [ARROW-8467](https://issues.apache.org/jira/browse/ARROW-8467) - [C++] Test cases using ArrayFromJSON assume only a little-endian platform
* [ARROW-8474](https://issues.apache.org/jira/browse/ARROW-8474) - [CI][Crossbow] Skip some nightlies we don't need to run
* [ARROW-8477](https://issues.apache.org/jira/browse/ARROW-8477) - [C++] Enable reading and writing of long filenames for Windows
* [ARROW-8481](https://issues.apache.org/jira/browse/ARROW-8481) - [Java] Provide an allocation manager based on Unsafe API
* [ARROW-8483](https://issues.apache.org/jira/browse/ARROW-8483) - [Ruby] Arrow::Table documentation improvement
* [ARROW-8485](https://issues.apache.org/jira/browse/ARROW-8485) - [Integration][Java] Implement extension types integration
* [ARROW-8486](https://issues.apache.org/jira/browse/ARROW-8486) - [C++] arrow-utility-test causes failures on a big-endian platform
* [ARROW-8487](https://issues.apache.org/jira/browse/ARROW-8487) - [FlightRPC][C++] Make it possible to target a specific payload size
* [ARROW-8488](https://issues.apache.org/jira/browse/ARROW-8488) - [R] Replace VALUE\_OR\_STOP with ValueOrStop
* [ARROW-8496](https://issues.apache.org/jira/browse/ARROW-8496) - [C++] Refine ByteStreamSplitDecodeScalar
* [ARROW-8497](https://issues.apache.org/jira/browse/ARROW-8497) - [Archery] Add missing component to builds
* [ARROW-8499](https://issues.apache.org/jira/browse/ARROW-8499) - [C++][Dataset] In ScannerBuilder, batch\_size will not work if projecter is not empty
* [ARROW-8500](https://issues.apache.org/jira/browse/ARROW-8500) - [C++] Use selection vectors in Filter implementation for record batches, tables
* [ARROW-8501](https://issues.apache.org/jira/browse/ARROW-8501) - [Packaging][RPM] Upgrade devtoolset to 8 on CentOS 6
* [ARROW-8502](https://issues.apache.org/jira/browse/ARROW-8502) - [Release][APT][Yum] Ignore all arm64 verifications
* [ARROW-8504](https://issues.apache.org/jira/browse/ARROW-8504) - [C++] Add Run Length Reader
* [ARROW-8506](https://issues.apache.org/jira/browse/ARROW-8506) - [c++] Miss tests to verify expected\_buffer with bit\_width \> 8 in RLE
* [ARROW-8507](https://issues.apache.org/jira/browse/ARROW-8507) - [Release] Detect .git directory automatically in changelog.py
* [ARROW-8509](https://issues.apache.org/jira/browse/ARROW-8509) - [GLib] Add low level record batch read/write functions
* [ARROW-8512](https://issues.apache.org/jira/browse/ARROW-8512) - [C++] Delete unused compute expr prototype code
* [ARROW-8513](https://issues.apache.org/jira/browse/ARROW-8513) - [Python] Expose Take with Table input in Python
* [ARROW-8515](https://issues.apache.org/jira/browse/ARROW-8515) - [C++] Bitmap ToString should have an option of grouping by bytes
* [ARROW-8516](https://issues.apache.org/jira/browse/ARROW-8516) - [Rust] Slow BufferBuilder<BooleanType\> inserts within PrimitiveBuilder::append\_slice
* [ARROW-8517](https://issues.apache.org/jira/browse/ARROW-8517) - [Developer][Release] Update Crossbow RC verification setup for changes since 0.16.0
* [ARROW-8520](https://issues.apache.org/jira/browse/ARROW-8520) - [Developer] Use .asf.yaml to direct GitHub notifications to e-mail lists and JIRA
* [ARROW-8521](https://issues.apache.org/jira/browse/ARROW-8521) - [Developer] Group Sub-task, Task, Test, and Wish issue types as "Improvement" in Changelog
* [ARROW-8522](https://issues.apache.org/jira/browse/ARROW-8522) - [Developer] Add environment variable option to toggle whether ephemeral NodeJS is installed in release verification script
* [ARROW-8524](https://issues.apache.org/jira/browse/ARROW-8524) - [CI] Free up space on github actions
* [ARROW-8526](https://issues.apache.org/jira/browse/ARROW-8526) - [Python] Fix non-deterministic row order failure in dataset tests
* [ARROW-8531](https://issues.apache.org/jira/browse/ARROW-8531) - [C++] Deprecate ARROW\_USE\_SIMD CMake option
* [ARROW-8538](https://issues.apache.org/jira/browse/ARROW-8538) - [Packaging] Remove boost from homebrew formula
* [ARROW-8540](https://issues.apache.org/jira/browse/ARROW-8540) - [C++] Create memory allocation benchmark
* [ARROW-8541](https://issues.apache.org/jira/browse/ARROW-8541) - [Release] Don't remove previous source releases automatically
* [ARROW-8542](https://issues.apache.org/jira/browse/ARROW-8542) - [Release] Fix checksum url in the website post release script
* [ARROW-8543](https://issues.apache.org/jira/browse/ARROW-8543) - [C++] IO: single pass coalescing algorithm
* [ARROW-8544](https://issues.apache.org/jira/browse/ARROW-8544) - [CI][Crossbow] Add a status.json to the gh-pages summary of nightly builds to get around rate limiting
* [ARROW-8548](https://issues.apache.org/jira/browse/ARROW-8548) - [Website] 0.17 release post
* [ARROW-8549](https://issues.apache.org/jira/browse/ARROW-8549) - [R] Assorted post-0.17 release cleanups
* [ARROW-8550](https://issues.apache.org/jira/browse/ARROW-8550) - [CI] Don't run cron GHA jobs on forks
* [ARROW-8551](https://issues.apache.org/jira/browse/ARROW-8551) - [CI][Gandiva] Use LLVM 8 to build gandiva linux jar
* [ARROW-8552](https://issues.apache.org/jira/browse/ARROW-8552) - [Rust] support column iteration for parquet row
* [ARROW-8553](https://issues.apache.org/jira/browse/ARROW-8553) - [C++] Optimize unaligned bitmap operations
* [ARROW-8555](https://issues.apache.org/jira/browse/ARROW-8555) - [FlightRPC][Java] Implement Flight DoExchange for Java
* [ARROW-8558](https://issues.apache.org/jira/browse/ARROW-8558) - [Rust] GitHub Actions missing rustfmt
* [ARROW-8559](https://issues.apache.org/jira/browse/ARROW-8559) - [Rust] Consolidate Record Batch reader traits in main arrow crate
* [ARROW-8560](https://issues.apache.org/jira/browse/ARROW-8560) - [Rust] Docs for MutableBuffer resize are incorrect
* [ARROW-8561](https://issues.apache.org/jira/browse/ARROW-8561) - [C++][Gandiva] Stop using deprecated google::protobuf::MessageLite::ByteSize()
* [ARROW-8562](https://issues.apache.org/jira/browse/ARROW-8562) - [C++] IO: Parameterize I/O coalescing using S3 storage metrics
* [ARROW-8563](https://issues.apache.org/jira/browse/ARROW-8563) - [Go] Minor change to make newBuilder public
* [ARROW-8564](https://issues.apache.org/jira/browse/ARROW-8564) - [Website] Add Ubuntu 20.04 LTS to supported package list
* [ARROW-8569](https://issues.apache.org/jira/browse/ARROW-8569) - [CI] Upgrade xcode version for testing homebrew formulae
* [ARROW-8571](https://issues.apache.org/jira/browse/ARROW-8571) - [C++] Switch AppVeyor image to VS 2017
* [ARROW-8572](https://issues.apache.org/jira/browse/ARROW-8572) - [Python] Expose UnionArray.array and other fields
* [ARROW-8573](https://issues.apache.org/jira/browse/ARROW-8573) - [Rust] Upgrade to Rust 1.44 nightly
* [ARROW-8574](https://issues.apache.org/jira/browse/ARROW-8574) - [Rust] Implement Debug for all plain types
* [ARROW-8575](https://issues.apache.org/jira/browse/ARROW-8575) - [Developer] Add issue\_comment workflow to rebase a PR
* [ARROW-8590](https://issues.apache.org/jira/browse/ARROW-8590) - [Rust] Use Arrow pretty print utility in DataFusion
* [ARROW-8591](https://issues.apache.org/jira/browse/ARROW-8591) - [Rust] Reverse lookup for a key in DictionaryArray
* [ARROW-8597](https://issues.apache.org/jira/browse/ARROW-8597) - [Rust] arrow crate lint and readability improvements
* [ARROW-8606](https://issues.apache.org/jira/browse/ARROW-8606) - [CI] Don't trigger all builds on a change to any file in ci/
* [ARROW-8607](https://issues.apache.org/jira/browse/ARROW-8607) - [R][CI] Unbreak builds following R 4.0 release
* [ARROW-8611](https://issues.apache.org/jira/browse/ARROW-8611) - [R] Can't install arrow 0.17 on Ubuntu 18.04 R 3.6.3
* [ARROW-8612](https://issues.apache.org/jira/browse/ARROW-8612) - [GLib] Add GArrowReadOptions and GArrowWriteOptions
* [ARROW-8616](https://issues.apache.org/jira/browse/ARROW-8616) - [Rust] Turn explicit SIMD off by default
* [ARROW-8619](https://issues.apache.org/jira/browse/ARROW-8619) - [C++] Use distinct Type::type values for interval types
* [ARROW-8622](https://issues.apache.org/jira/browse/ARROW-8622) - [Rust] Parquet crate does not compile on aarch64
* [ARROW-8623](https://issues.apache.org/jira/browse/ARROW-8623) - [C++][Gandiva] Reduce use of Boost, remove Boost headers from header files
* [ARROW-8624](https://issues.apache.org/jira/browse/ARROW-8624) - [Website] Install page should mention arrow-dataset packages
* [ARROW-8628](https://issues.apache.org/jira/browse/ARROW-8628) - [CI][Dev] Wrap docker-compose commands with archery
* [ARROW-8629](https://issues.apache.org/jira/browse/ARROW-8629) - [Rust] Eliminate indirection of ZST allocations
* [ARROW-8633](https://issues.apache.org/jira/browse/ARROW-8633) - [C++] Add ValidateAscii function
* [ARROW-8634](https://issues.apache.org/jira/browse/ARROW-8634) - [Java] Create an example
* [ARROW-8639](https://issues.apache.org/jira/browse/ARROW-8639) - [C++][Plasma] Require gflags
* [ARROW-8645](https://issues.apache.org/jira/browse/ARROW-8645) - [C++] Missing gflags dependency for plasma
* [ARROW-8647](https://issues.apache.org/jira/browse/ARROW-8647) - [C++][Dataset] Optionally encode partition field values as dictionary type
* [ARROW-8648](https://issues.apache.org/jira/browse/ARROW-8648) - [Rust] Optimize Rust CI Build Times
* [ARROW-8650](https://issues.apache.org/jira/browse/ARROW-8650) - [Rust] [Website] Add documentation to Arrow website
* [ARROW-8651](https://issues.apache.org/jira/browse/ARROW-8651) - [Python][Dataset] Support pickling of Dataset objects
* [ARROW-8656](https://issues.apache.org/jira/browse/ARROW-8656) - [Python] Switch to VS2017 in the windows wheel builds
* [ARROW-8659](https://issues.apache.org/jira/browse/ARROW-8659) - [Rust] ListBuilder and FixedSizeListBuilder capacity
* [ARROW-8660](https://issues.apache.org/jira/browse/ARROW-8660) - [C++][Gandiva] Reduce dependence on Boost
* [ARROW-8662](https://issues.apache.org/jira/browse/ARROW-8662) - [CI] Consolidate appveyor scripts
* [ARROW-8664](https://issues.apache.org/jira/browse/ARROW-8664) - [Java] Add skip null check to all Vector types
* [ARROW-8668](https://issues.apache.org/jira/browse/ARROW-8668) - [Packaging][APT][Yum][ARM] Use Travis CI's ARM machine to build packages
* [ARROW-8669](https://issues.apache.org/jira/browse/ARROW-8669) - [C++]  Add IpcWriteOptions argument to GetRecordBatchSize()
* [ARROW-8671](https://issues.apache.org/jira/browse/ARROW-8671) - [C++] Use IPC body compression metadata approved in ARROW-300
* [ARROW-8671](https://issues.apache.org/jira/browse/ARROW-8671) - [C++] Use IPC body compression metadata approved in ARROW-300
* [ARROW-8682](https://issues.apache.org/jira/browse/ARROW-8682) - [Ruby][Parquet] Add support for column level compression
* [ARROW-8687](https://issues.apache.org/jira/browse/ARROW-8687) - [Java] Finish move of io.netty.buffer.ArrowBuf
* [ARROW-8690](https://issues.apache.org/jira/browse/ARROW-8690) - [Python] Clean-up dataset+parquet tests now order is determinstic
* [ARROW-8692](https://issues.apache.org/jira/browse/ARROW-8692) - [C++] Avoid memory copies when downloading from S3
* [ARROW-8695](https://issues.apache.org/jira/browse/ARROW-8695) - [Java] remove references to PlatformDependent in memory module
* [ARROW-8696](https://issues.apache.org/jira/browse/ARROW-8696) - [Java] Convert tests to integration tests
* [ARROW-8699](https://issues.apache.org/jira/browse/ARROW-8699) - [R] Fix automatic r\_to\_py conversion
* [ARROW-8702](https://issues.apache.org/jira/browse/ARROW-8702) - [Packaging][C\#] Build NuGet packages in release process
* [ARROW-8703](https://issues.apache.org/jira/browse/ARROW-8703) - [R] schema$metadata should be properly typed
* [ARROW-8707](https://issues.apache.org/jira/browse/ARROW-8707) - [CI] Docker push fails because of wrong dockerhub credentials
* [ARROW-8708](https://issues.apache.org/jira/browse/ARROW-8708) - [CI] Utilize github actions cache for docker-compose volumes
* [ARROW-8711](https://issues.apache.org/jira/browse/ARROW-8711) - [Python] Expose strptime timestamp parsing in read\_csv conversion options
* [ARROW-8717](https://issues.apache.org/jira/browse/ARROW-8717) - [CI][Packaging] Add build dependency on boost to homebrew
* [ARROW-8720](https://issues.apache.org/jira/browse/ARROW-8720) - [C++] Fix checked\_pointer\_cast
* [ARROW-8721](https://issues.apache.org/jira/browse/ARROW-8721) - [CI] Fix R build matrix
* [ARROW-8723](https://issues.apache.org/jira/browse/ARROW-8723) - [Rust] Remove SIMD specific benchmark code
* [ARROW-8724](https://issues.apache.org/jira/browse/ARROW-8724) - [Packaging][deb][RPM] Use directory in host as build directory
* [ARROW-8725](https://issues.apache.org/jira/browse/ARROW-8725) - [Rust] redundant directory walk in rust parquet datasource code
* [ARROW-8727](https://issues.apache.org/jira/browse/ARROW-8727) - [C++] Do not require struct-initialization of StringConverter<T\> to parse strings to other types
* [ARROW-8730](https://issues.apache.org/jira/browse/ARROW-8730) - [Rust] Use slice instead of &Vec for function arguments
* [ARROW-8733](https://issues.apache.org/jira/browse/ARROW-8733) - [C++][Dataset][Python] ParquetFileFragment should provide access to parquet FileMetadata
* [ARROW-8736](https://issues.apache.org/jira/browse/ARROW-8736) - [Rust] [DataFusion] Table API should provide a schema() method
* [ARROW-8740](https://issues.apache.org/jira/browse/ARROW-8740) - [CI] Fix archery option in pandas master cron test
* [ARROW-8742](https://issues.apache.org/jira/browse/ARROW-8742) - [C++][Python] Add flight client support for Mutual TLS
* [ARROW-8743](https://issues.apache.org/jira/browse/ARROW-8743) - [C++][CI] Add a test job on s390x
* [ARROW-8744](https://issues.apache.org/jira/browse/ARROW-8744) - [Rust] ParquetIterator's next method should be safe to call even after reached end of iteration
* [ARROW-8745](https://issues.apache.org/jira/browse/ARROW-8745) - [C++] Bitmap.ToString causes failures on a big-endian platform
* [ARROW-8747](https://issues.apache.org/jira/browse/ARROW-8747) - [C++] Feather tests with compression cause failure on big-endian platforms
* [ARROW-8751](https://issues.apache.org/jira/browse/ARROW-8751) - [Rust] ParquetFileArrowReader should be able to read empty parquet file without error
* [ARROW-8752](https://issues.apache.org/jira/browse/ARROW-8752) - [Rust] Remove unused hashmap
* [ARROW-8753](https://issues.apache.org/jira/browse/ARROW-8753) - [C++][CI] Add a test job on ARM
* [ARROW-8754](https://issues.apache.org/jira/browse/ARROW-8754) - [C++][CI] enable tests for additional components on big-endian platforms
* [ARROW-8756](https://issues.apache.org/jira/browse/ARROW-8756) - [C++] Bitmap word tests cause failures on a big-endian platform
* [ARROW-8757](https://issues.apache.org/jira/browse/ARROW-8757) - [C++] Plasma header is written in native endian
* [ARROW-8758](https://issues.apache.org/jira/browse/ARROW-8758) - [R] Updates for compatibility with dplyr 1.0
* [ARROW-8759](https://issues.apache.org/jira/browse/ARROW-8759) - [C++] TestPlasmaSerialization.DeleteReply tests failure on big-endian platforms
* [ARROW-8762](https://issues.apache.org/jira/browse/ARROW-8762) - [C++][Gandiva] Replace Gandiva's BitmapAnd with common implementation
* [ARROW-8763](https://issues.apache.org/jira/browse/ARROW-8763) - [C++] Create RandomAccessFile::WillNeed-like API
* [ARROW-8764](https://issues.apache.org/jira/browse/ARROW-8764) - [C++] Make ThreadPool configurable in ReadRangeCache
* [ARROW-8766](https://issues.apache.org/jira/browse/ARROW-8766) - [Python] A FileSystem implementation based on Python callbacks
* [ARROW-8769](https://issues.apache.org/jira/browse/ARROW-8769) - [C++] Add convenience methods to access fields by name in StructScalar
* [ARROW-8770](https://issues.apache.org/jira/browse/ARROW-8770) - [C++][CI] enable arrow-csv-test on s390x
* [ARROW-8772](https://issues.apache.org/jira/browse/ARROW-8772) - [C++] Expand SumKernel benchmark to more types
* [ARROW-8777](https://issues.apache.org/jira/browse/ARROW-8777) - [Rust] Parquet.rs does not support reading fixed-size binary fields.
* [ARROW-8778](https://issues.apache.org/jira/browse/ARROW-8778) - [C++][Gandiva] SelectionVector related test failed on big-endian platforms
* [ARROW-8779](https://issues.apache.org/jira/browse/ARROW-8779) - [R] Implement conversion to List<Struct\>
* [ARROW-8781](https://issues.apache.org/jira/browse/ARROW-8781) - [CI][C++] Enable ccache on GHA MinGW jobs
* [ARROW-8782](https://issues.apache.org/jira/browse/ARROW-8782) - [Rust] [DataFusion] Add benchmarks based on NYC Taxi data set
* [ARROW-8783](https://issues.apache.org/jira/browse/ARROW-8783) - [Rust] [DataFusion] Logical plan should have ParquetScan and CsvScan entries
* [ARROW-8784](https://issues.apache.org/jira/browse/ARROW-8784) - [Rust] [DataFusion] Remove use of Arc from LogicalPlan
* [ARROW-8785](https://issues.apache.org/jira/browse/ARROW-8785) - [Python][Packaging] Build the windows wheels with MIMALLOC enabled
* [ARROW-8786](https://issues.apache.org/jira/browse/ARROW-8786) - [Packaging][rpm] Use bundled zstd in the CentOS 8 build
* [ARROW-8788](https://issues.apache.org/jira/browse/ARROW-8788) - [C\#] Array builders to use bit-packed buffer builder rather than boolean array builder for validity map
* [ARROW-8789](https://issues.apache.org/jira/browse/ARROW-8789) - [Rust] Add separate crate for integration test binaries
* [ARROW-8790](https://issues.apache.org/jira/browse/ARROW-8790) - [C++][CI] Enable arrow-flight-test on s390x
* [ARROW-8791](https://issues.apache.org/jira/browse/ARROW-8791) - [Rust] Creating StringDictionaryBuilder with existing dictionary values
* [ARROW-8792](https://issues.apache.org/jira/browse/ARROW-8792) - [C++] Improved declarative compute function / kernel development framework, normalize calling conventions
* [ARROW-8793](https://issues.apache.org/jira/browse/ARROW-8793) - [C++] BitUtil::SetBitsTo probably doesn't need to be inline
* [ARROW-8794](https://issues.apache.org/jira/browse/ARROW-8794) - [C++] Expand benchmark coverage for arrow from parquet reading
* [ARROW-8795](https://issues.apache.org/jira/browse/ARROW-8795) - [C++] Limited iOS support
* [ARROW-8800](https://issues.apache.org/jira/browse/ARROW-8800) - [C++] Split arrow::ChunkedArray into arrow/chunked\_array.h
* [ARROW-8804](https://issues.apache.org/jira/browse/ARROW-8804) - [R][CI] Followup to Rtools40 upgrade
* [ARROW-8814](https://issues.apache.org/jira/browse/ARROW-8814) - [Dev][Release] Binary upload script keeps raising locale warnings
* [ARROW-8815](https://issues.apache.org/jira/browse/ARROW-8815) - [Dev][Release] Binary upload script should retry on unexpected bintray request error
* [ARROW-8818](https://issues.apache.org/jira/browse/ARROW-8818) - [Rust] Failing to build on master due to Flatbuffers/Union issues
* [ARROW-8822](https://issues.apache.org/jira/browse/ARROW-8822) - [Rust] [DataFusion] Add MemoryScan variant to LogicalPlan
* [ARROW-8827](https://issues.apache.org/jira/browse/ARROW-8827) - [Integration Testing] Initial skeleton for Rust integration tests
* [ARROW-8830](https://issues.apache.org/jira/browse/ARROW-8830) - [GLib] Add support for Tell againt not seekable GIO output stream
* [ARROW-8831](https://issues.apache.org/jira/browse/ARROW-8831) - [Rust] incomplete SIMD implementation in simd\_compare\_op
* [ARROW-8833](https://issues.apache.org/jira/browse/ARROW-8833) - [Rust] Implement VALIDATE mode in integration test binary
* [ARROW-8834](https://issues.apache.org/jira/browse/ARROW-8834) - [Rust] Implement arrow-file-to-stream for integration testing
* [ARROW-8835](https://issues.apache.org/jira/browse/ARROW-8835) - [Rust] Implement arrow-stream-to-file for integration testing
* [ARROW-8836](https://issues.apache.org/jira/browse/ARROW-8836) - [Website] Update copyright end year automatically
* [ARROW-8837](https://issues.apache.org/jira/browse/ARROW-8837) - [Rust] Add Null type
* [ARROW-8838](https://issues.apache.org/jira/browse/ARROW-8838) - [Rust] File reader fails to read header from valid files
* [ARROW-8839](https://issues.apache.org/jira/browse/ARROW-8839) - [Rust] datafusion logical plan should support scaning csv without provided schema
* [ARROW-8840](https://issues.apache.org/jira/browse/ARROW-8840) - [Rust] datafusion ExecutionError should implement std::error:Error trait
* [ARROW-8841](https://issues.apache.org/jira/browse/ARROW-8841) - [C++] Add benchmark and unittest for PLAIN spaced
* [ARROW-8843](https://issues.apache.org/jira/browse/ARROW-8843) - [C++] Optimize BitmapEquals unaligned case
* [ARROW-8844](https://issues.apache.org/jira/browse/ARROW-8844) - [C++] Optimize TransferBitmap unaligned case
* [ARROW-8846](https://issues.apache.org/jira/browse/ARROW-8846) - [Dev][Python] Autoformat Python sources with Archery
* [ARROW-8847](https://issues.apache.org/jira/browse/ARROW-8847) - [C++] Pass task size / metrics in Executor API
* [ARROW-8851](https://issues.apache.org/jira/browse/ARROW-8851) - [Python][Documentation] Fix FutureWarnings in Python Plasma docs
* [ARROW-8852](https://issues.apache.org/jira/browse/ARROW-8852) - [R] Post-0.17.1 adjustments
* [ARROW-8854](https://issues.apache.org/jira/browse/ARROW-8854) - [Rust] [Integration Testing] Show output from arrow-json-integration-test
* [ARROW-8855](https://issues.apache.org/jira/browse/ARROW-8855) - [Rust] [Integration Testing] data type Date32(Day) not supported
* [ARROW-8856](https://issues.apache.org/jira/browse/ARROW-8856) - [Rust] [Integration Testing] Return empty batch if MessageHeader is NONE
* [ARROW-8864](https://issues.apache.org/jira/browse/ARROW-8864) - [R] Add methods to Table/RecordBatch for consistency with data.frame
* [ARROW-8866](https://issues.apache.org/jira/browse/ARROW-8866) - [C++] Split Type::UNION into Type::SPARSE\_UNION and Type::DENSE\_UNION
* [ARROW-8867](https://issues.apache.org/jira/browse/ARROW-8867) - [R] Support converting POSIXlt type
* [ARROW-8875](https://issues.apache.org/jira/browse/ARROW-8875) - [C++] use AWS SDK SetResponseStreamFactory to avoid a copy of bytes
* [ARROW-8877](https://issues.apache.org/jira/browse/ARROW-8877) - [Rust] add CSV read option struct to simplify datafusion interface
* [ARROW-8879](https://issues.apache.org/jira/browse/ARROW-8879) - [FlightRPC][Java] FlightStream should unwrap ExecutionExceptions
* [ARROW-8880](https://issues.apache.org/jira/browse/ARROW-8880) - [R][Linux] Make R Binary Install Friendlier
* [ARROW-8881](https://issues.apache.org/jira/browse/ARROW-8881) - [Rust] Add large list and binary support
* [ARROW-8885](https://issues.apache.org/jira/browse/ARROW-8885) - [R] Don't include everything everywhere
* [ARROW-8886](https://issues.apache.org/jira/browse/ARROW-8886) - [C\#] Decide and implement appropriate behaviour for Array builder resize to negative size
* [ARROW-8887](https://issues.apache.org/jira/browse/ARROW-8887) - [Java] Buffer size for complex vectors increases rapidly in case of clear/write loop
* [ARROW-8890](https://issues.apache.org/jira/browse/ARROW-8890) - [R] Fix C++ lint issue
* [ARROW-8895](https://issues.apache.org/jira/browse/ARROW-8895) - [C++] Add C++ unit tests for filter and take functions on temporal type inputs, including timestamps
* [ARROW-8896](https://issues.apache.org/jira/browse/ARROW-8896) - [C++] Reimplement dictionary unpacking in Cast kernels using Take
* [ARROW-8899](https://issues.apache.org/jira/browse/ARROW-8899) - [R] Add R metadata like pandas metadata for round-trip fidelity
* [ARROW-8901](https://issues.apache.org/jira/browse/ARROW-8901) - [C++] Reduce number of take kernels
* [ARROW-8903](https://issues.apache.org/jira/browse/ARROW-8903) - [C++] Implement optimized "unsafe take" for use with selection vectors for kernel execution
* [ARROW-8904](https://issues.apache.org/jira/browse/ARROW-8904) - [Python] Fix usages of deprecated C++ APIs related to child/field
* [ARROW-8906](https://issues.apache.org/jira/browse/ARROW-8906) - [Rust] Support reading multiple CSV files for schema inference
* [ARROW-8907](https://issues.apache.org/jira/browse/ARROW-8907) - [Rust] implement scalar comparison operations
* [ARROW-8912](https://issues.apache.org/jira/browse/ARROW-8912) - [Ruby] Keep reference of Arrow::Buffer's data for GC
* [ARROW-8913](https://issues.apache.org/jira/browse/ARROW-8913) - [Ruby] Use "field" instead of "child"
* [ARROW-8914](https://issues.apache.org/jira/browse/ARROW-8914) - [C++][Gandiva] Decimal128 related test failed on big-endian platforms
* [ARROW-8915](https://issues.apache.org/jira/browse/ARROW-8915) - [Dev][Archery] Require Click 7
* [ARROW-8917](https://issues.apache.org/jira/browse/ARROW-8917) - [C++][Compute] Formalize "metafunction" concept
* [ARROW-8918](https://issues.apache.org/jira/browse/ARROW-8918) - [C++] Add cast "metafunction" to FunctionRegistry that addresses dispatching to appropriate type-specific CastFunction
* [ARROW-8922](https://issues.apache.org/jira/browse/ARROW-8922) - [C++] Implement example string scalar kernel function to assist with string kernels buildout per ARROW-555
* [ARROW-8923](https://issues.apache.org/jira/browse/ARROW-8923) - [C++] Improve usability of arrow::compute::CallFunction by moving ExecContext\* argument to end and adding default
* [ARROW-8926](https://issues.apache.org/jira/browse/ARROW-8926) - [C++] Improve docstrings in new public APIs in arrow/compute and fix miscellaneous typos
* [ARROW-8927](https://issues.apache.org/jira/browse/ARROW-8927) - [C++] Support dictionary memos when reading/writing record batches using cuda IPC
* [ARROW-8929](https://issues.apache.org/jira/browse/ARROW-8929) - [C++] Change compute::Arity:VarArgs min\_args default to 0
* [ARROW-8931](https://issues.apache.org/jira/browse/ARROW-8931) - [Rust] Support lexical sort in arrow compute kernel
* [ARROW-8933](https://issues.apache.org/jira/browse/ARROW-8933) - [C++] Reduce generated code in vector\_hash.cc
* [ARROW-8934](https://issues.apache.org/jira/browse/ARROW-8934) - [C++] Add timestamp subtract kernel aliased to int64 subtract implementation
* [ARROW-8937](https://issues.apache.org/jira/browse/ARROW-8937) - [C++] Add "parse\_strptime" function for string to timestamp conversions using the kernels framework
* [ARROW-8938](https://issues.apache.org/jira/browse/ARROW-8938) - [R] Provide binding for arrow::compute::CallFunction
* [ARROW-8940](https://issues.apache.org/jira/browse/ARROW-8940) - [Java] Fix the performance degradation of integration tests
* [ARROW-8941](https://issues.apache.org/jira/browse/ARROW-8941) - [C++/Python] arrow-nightlies conda repository is full
* [ARROW-8942](https://issues.apache.org/jira/browse/ARROW-8942) - [R] Detect compression in reading CSV/JSON
* [ARROW-8943](https://issues.apache.org/jira/browse/ARROW-8943) - [C++][Dataset] Add support for Partitioning to ParquetDatasetFactory
* [ARROW-8950](https://issues.apache.org/jira/browse/ARROW-8950) - [C++] Make head optional in s3fs
* [ARROW-8958](https://issues.apache.org/jira/browse/ARROW-8958) - [FlightRPC][Python] Implement Flight DoExchange for Python
* [ARROW-8960](https://issues.apache.org/jira/browse/ARROW-8960) - [MINOR] [FORMAT] Fix typos in comments
* [ARROW-8961](https://issues.apache.org/jira/browse/ARROW-8961) - [C++] Add utf8proc library to toolchain
* [ARROW-8963](https://issues.apache.org/jira/browse/ARROW-8963) - [C++][Parquet] Parquet cpp optimize allocate memory
* [ARROW-8965](https://issues.apache.org/jira/browse/ARROW-8965) - [Python][Documentation] Pyarrow documentation for pip nightlies references 404'd location
* [ARROW-8966](https://issues.apache.org/jira/browse/ARROW-8966) - [C++] Move arrow::ArrayData to a separate header file
* [ARROW-8969](https://issues.apache.org/jira/browse/ARROW-8969) - [C++] Reduce generated code in compute/kernels/scalar\_compare.cc
* [ARROW-8970](https://issues.apache.org/jira/browse/ARROW-8970) - [C++] Reduce shared library / binary code size (umbrella issue)
* [ARROW-8972](https://issues.apache.org/jira/browse/ARROW-8972) - [Java] Support range value comparison for large varchar/varbinary vectors
* [ARROW-8973](https://issues.apache.org/jira/browse/ARROW-8973) - [Java] Support batch value appending for large varchar/varbinary vectors
* [ARROW-8974](https://issues.apache.org/jira/browse/ARROW-8974) - [C++] Refine TransferBitmap template parameters
* [ARROW-8976](https://issues.apache.org/jira/browse/ARROW-8976) - [C++] compute::CallFunction can't Filter/Take with ChunkedArray
* [ARROW-8979](https://issues.apache.org/jira/browse/ARROW-8979) - [C++] Implement bitmap word reader and writer
* [ARROW-8984](https://issues.apache.org/jira/browse/ARROW-8984) - [R] Revise install guides now that Windows conda package exists
* [ARROW-8985](https://issues.apache.org/jira/browse/ARROW-8985) - [Format] Add "byte width" field with default of 16 to Decimal Flatbuffers type for forward compatibility
* [ARROW-8989](https://issues.apache.org/jira/browse/ARROW-8989) - [C++] Document available functions in compute::FunctionRegistry
* [ARROW-8993](https://issues.apache.org/jira/browse/ARROW-8993) - [Rust] Support reading non-seekable sources in text readers
* [ARROW-8994](https://issues.apache.org/jira/browse/ARROW-8994) - [C++] Disable include-what-you-use cpplint lint checks
* [ARROW-8996](https://issues.apache.org/jira/browse/ARROW-8996) - [C++] Runtime SIMD path for Aggregate Sum/Mean kernel
* [ARROW-8997](https://issues.apache.org/jira/browse/ARROW-8997) - [Archery] Benchmark formatter should have friendly units
* [ARROW-9004](https://issues.apache.org/jira/browse/ARROW-9004) - [C++][Gandiva] Support building with LLVM 10
* [ARROW-9005](https://issues.apache.org/jira/browse/ARROW-9005) - [Rust] [DataFusion] Support sort expression
* [ARROW-9007](https://issues.apache.org/jira/browse/ARROW-9007) - [Rust] Support appending arrays by merging array data
* [ARROW-9011](https://issues.apache.org/jira/browse/ARROW-9011) - [Python][Packaging] Move the anaconda cleanup script to crossbow
* [ARROW-9014](https://issues.apache.org/jira/browse/ARROW-9014) - [Packaging] Bump the minor part of the automatically generated version in crossbow
* [ARROW-9015](https://issues.apache.org/jira/browse/ARROW-9015) - [Java] Make BaseAllocator package private
* [ARROW-9016](https://issues.apache.org/jira/browse/ARROW-9016) - [Java] Remove direct references to Netty/Unsafe Allocators
* [ARROW-9017](https://issues.apache.org/jira/browse/ARROW-9017) - [Python] Refactor the Scalar classes
* [ARROW-9018](https://issues.apache.org/jira/browse/ARROW-9018) - [C++] Remove APIs that were deprecated in 0.17.x and prior
* [ARROW-9021](https://issues.apache.org/jira/browse/ARROW-9021) - [Python] The filesystem keyword in parquet.read\_table is not documented
* [ARROW-9022](https://issues.apache.org/jira/browse/ARROW-9022) - [C++] Add/Sub/Mul arithmetic kernels with overflow check
* [ARROW-9029](https://issues.apache.org/jira/browse/ARROW-9029) - [C++] Implement BitBlockCounter interface for blockwise popcounts of validity bitmaps
* [ARROW-9030](https://issues.apache.org/jira/browse/ARROW-9030) - [Python] Clean up some usages of pyarrow.compat, move some common functions/symbols to lib.pyx
* [ARROW-9031](https://issues.apache.org/jira/browse/ARROW-9031) - [R] Implement conversion from Type::UINT64 to R vector
* [ARROW-9032](https://issues.apache.org/jira/browse/ARROW-9032) - [C++] Split arrow/util/bit\_util.h into multiple header files
* [ARROW-9034](https://issues.apache.org/jira/browse/ARROW-9034) - [C++] Implement binary (two bitmap) version of BitBlockCounter
* [ARROW-9042](https://issues.apache.org/jira/browse/ARROW-9042) - [C++] Add Subtract and Multiply arithmetic kernels with wrap-around behavior
* [ARROW-9043](https://issues.apache.org/jira/browse/ARROW-9043) - [Go] Temporarily copy LICENSE.txt to go/
* [ARROW-9043](https://issues.apache.org/jira/browse/ARROW-9043) - [Go] Temporarily copy LICENSE.txt to go/
* [ARROW-9045](https://issues.apache.org/jira/browse/ARROW-9045) - [C++] Improve and expand Take/Filter benchmarks
* [ARROW-9046](https://issues.apache.org/jira/browse/ARROW-9046) - [C++][R] Put more things in type\_fwds
* [ARROW-9047](https://issues.apache.org/jira/browse/ARROW-9047) - [Rust] Setting 0-bits of a 0-length bitset segfaults
* [ARROW-9050](https://issues.apache.org/jira/browse/ARROW-9050) - [Release] Use 1.0.0 as the next version
* [ARROW-9051](https://issues.apache.org/jira/browse/ARROW-9051) - [GLib] Refer Array related objects from Array
* [ARROW-9052](https://issues.apache.org/jira/browse/ARROW-9052) - [CI][MinGW] Enable Gandiva
* [ARROW-9055](https://issues.apache.org/jira/browse/ARROW-9055) - [C++] Add sum/mean kernels for Boolean type
* [ARROW-9058](https://issues.apache.org/jira/browse/ARROW-9058) - [Packaging][wheel] Boost download is failed
* [ARROW-9060](https://issues.apache.org/jira/browse/ARROW-9060) - [GLib] Add support for building Apache Arrow Datasets GLib with non-installed Apache Arrow Datasets
* [ARROW-9061](https://issues.apache.org/jira/browse/ARROW-9061) - [Packaging][APT][Yum][GLib] Add Apache Arrow Datasets GLib
* [ARROW-9062](https://issues.apache.org/jira/browse/ARROW-9062) - [Rust] Support to read JSON into dictionary type
* [ARROW-9067](https://issues.apache.org/jira/browse/ARROW-9067) - [C++] Create reusable branchless / vectorized index boundschecking functions
* [ARROW-9070](https://issues.apache.org/jira/browse/ARROW-9070) - [C++] StructScalar needs field accessor methods
* [ARROW-9073](https://issues.apache.org/jira/browse/ARROW-9073) - [C++] RapidJSON include directory detection doesn't work with RapidJSONConfig.cmake
* [ARROW-9074](https://issues.apache.org/jira/browse/ARROW-9074) - [GLib] Add missing arrow-json check
* [ARROW-9075](https://issues.apache.org/jira/browse/ARROW-9075) - [C++] Optimize Filter implementation
* [ARROW-9079](https://issues.apache.org/jira/browse/ARROW-9079) - [C++] Write benchmark for arithmetic kernels
* [ARROW-9083](https://issues.apache.org/jira/browse/ARROW-9083) - [R] collect int64, uint32, uint64 as R integer type if not out of bounds
* [ARROW-9086](https://issues.apache.org/jira/browse/ARROW-9086) - [CI][Homebrew] Enable Gandiva
* [ARROW-9088](https://issues.apache.org/jira/browse/ARROW-9088) - [Rust] Recent version of arrow crate does not compile into wasm target
* [ARROW-9089](https://issues.apache.org/jira/browse/ARROW-9089) - [Python] A PyFileSystem handler for fsspec-based filesystems
* [ARROW-9090](https://issues.apache.org/jira/browse/ARROW-9090) - [C++] Bump versions of bundled libraries
* [ARROW-9091](https://issues.apache.org/jira/browse/ARROW-9091) - [C++] Utilize function's default options when passing no options to CallFunction for a function that requires them
* [ARROW-9093](https://issues.apache.org/jira/browse/ARROW-9093) - [FlightRPC][C++][Python] Allow setting gRPC client options
* [ARROW-9094](https://issues.apache.org/jira/browse/ARROW-9094) - [Python] Bump versions of compiled dependencies in manylinux wheels
* [ARROW-9095](https://issues.apache.org/jira/browse/ARROW-9095) - [Rust] Fix NullArray to comply with spec
* [ARROW-9099](https://issues.apache.org/jira/browse/ARROW-9099) - [C++][Gandiva] Add TRIM function for string
* [ARROW-9100](https://issues.apache.org/jira/browse/ARROW-9100) - [C++] Add ascii\_lower kernel
* [ARROW-9101](https://issues.apache.org/jira/browse/ARROW-9101) - [Doc][C++][Python] Document encoding expected by CSV and JSON readers
* [ARROW-9102](https://issues.apache.org/jira/browse/ARROW-9102) - [Packaging] Upload built manylinux docker images
* [ARROW-9106](https://issues.apache.org/jira/browse/ARROW-9106) - [C++] Add C++ foundation to ease file transcoding
* [ARROW-9108](https://issues.apache.org/jira/browse/ARROW-9108) - [C++][Dataset] Add Parquet Statistics conversion for timestamp columns
* [ARROW-9109](https://issues.apache.org/jira/browse/ARROW-9109) - [Python][Packaging] Enable S3 support in manylinux wheels
* [ARROW-9110](https://issues.apache.org/jira/browse/ARROW-9110) - [C++] Fix CPU cache size detection on macOS
* [ARROW-9112](https://issues.apache.org/jira/browse/ARROW-9112) - [R] Update autobrew script location
* [ARROW-9115](https://issues.apache.org/jira/browse/ARROW-9115) - [C++] Process data buffers in batch in ascii\_lower / ascii\_upper kernels rather than using string\_view value iteration
* [ARROW-9116](https://issues.apache.org/jira/browse/ARROW-9116) - [C++] Add BinaryArray::total\_values\_length()
* [ARROW-9116](https://issues.apache.org/jira/browse/ARROW-9116) - [C++] Add BinaryArray::total\_values\_length()
* [ARROW-9118](https://issues.apache.org/jira/browse/ARROW-9118) - [C++] Add more general BoundsCheck function that also checks for arbitrary lower limits in integer arrays
* [ARROW-9119](https://issues.apache.org/jira/browse/ARROW-9119) - [C++] Add support for building with system static gRPC
* [ARROW-9123](https://issues.apache.org/jira/browse/ARROW-9123) - [Python][wheel] Use libzstd.a explicitly
* [ARROW-9124](https://issues.apache.org/jira/browse/ARROW-9124) - [Rust][Datafusion] DFParser should consume sql query as &str instead of String
* [ARROW-9125](https://issues.apache.org/jira/browse/ARROW-9125) - [C++] Add missing include for arrow::internal::ZeroMemory() for Valgrind
* [ARROW-9129](https://issues.apache.org/jira/browse/ARROW-9129) - [Python][JPype] Test is failed with JPype 0.7.5
* [ARROW-9130](https://issues.apache.org/jira/browse/ARROW-9130) - [Python] Add deprecated wrappers functions to a pyarrow/compat.py module for 1.0.0 that will be removed later
* [ARROW-9131](https://issues.apache.org/jira/browse/ARROW-9131) - [C++] Faster ascii\_lower and ascii\_upper
* [ARROW-9132](https://issues.apache.org/jira/browse/ARROW-9132) - [C++] Implement hash kernels for dictionary data with constant dictionaries
* [ARROW-9133](https://issues.apache.org/jira/browse/ARROW-9133) - [C++] Add utf8\_upper and utf8\_lower
* [ARROW-9137](https://issues.apache.org/jira/browse/ARROW-9137) - [GLib][Ruby] Allow to read Parquet files in chunks (by RowGroup)
* [ARROW-9138](https://issues.apache.org/jira/browse/ARROW-9138) - [Docs][Format] Make sure format version is hard coded in the docs
* [ARROW-9139](https://issues.apache.org/jira/browse/ARROW-9139) - [Python] parquet read\_table should not use\_legacy\_dataset
* [ARROW-9144](https://issues.apache.org/jira/browse/ARROW-9144) - [CI] OSS-Fuzz build fails because recent changes in the google repository
* [ARROW-9145](https://issues.apache.org/jira/browse/ARROW-9145) - [C++] Add true\_count / false\_count methods to BooleanArray
* [ARROW-9152](https://issues.apache.org/jira/browse/ARROW-9152) - [C++] Create specialized filter implementation for varbinary types
* [ARROW-9153](https://issues.apache.org/jira/browse/ARROW-9153) - [Python] Add bindings for StructScalar
* [ARROW-9154](https://issues.apache.org/jira/browse/ARROW-9154) - [Developer] Use GitHub issue templates better
* [ARROW-9155](https://issues.apache.org/jira/browse/ARROW-9155) - [Archery] Less precise but faster default settings for "archery benchmark diff"
* [ARROW-9156](https://issues.apache.org/jira/browse/ARROW-9156) - [C++] Reducing the code size of the tensor module
* [ARROW-9157](https://issues.apache.org/jira/browse/ARROW-9157) - [Rust][Datafusion] execution context's create\_physical\_plan should take self as immutable reference
* [ARROW-9158](https://issues.apache.org/jira/browse/ARROW-9158) - [Rust][Datafusion] Projection physical plan compilation should preserve nullability
* [ARROW-9159](https://issues.apache.org/jira/browse/ARROW-9159) - [Python] Expose the isnull/isvalid kernels
* [ARROW-9162](https://issues.apache.org/jira/browse/ARROW-9162) - [Python] Expose Add/Subtract/Multiply arithmetic kernels
* [ARROW-9163](https://issues.apache.org/jira/browse/ARROW-9163) - [C++] Add methods to StringArray, LargeStringArray, to validate whether its values are all UTF-8
* [ARROW-9166](https://issues.apache.org/jira/browse/ARROW-9166) - [Website] Add overview page
* [ARROW-9167](https://issues.apache.org/jira/browse/ARROW-9167) - [Doc][Website] /docs/c\_glib/index.html is overwritten
* [ARROW-9168](https://issues.apache.org/jira/browse/ARROW-9168) - [C++][Flight] allow flight benchmark to use separated TCP connections
* [ARROW-9173](https://issues.apache.org/jira/browse/ARROW-9173) - [C++] Document how to use Arrow from a third-party CMake project
* [ARROW-9175](https://issues.apache.org/jira/browse/ARROW-9175) - [FlightRPC][C++][Python] Expose connected peer
* [ARROW-9176](https://issues.apache.org/jira/browse/ARROW-9176) - [Rust] Fix for memory leaks in Arrow allocator
* [ARROW-9178](https://issues.apache.org/jira/browse/ARROW-9178) - [R] Improve documentation about CSV reader
* [ARROW-9179](https://issues.apache.org/jira/browse/ARROW-9179) - [R] Replace usage of iris dataset in tests
* [ARROW-9180](https://issues.apache.org/jira/browse/ARROW-9180) - [Developer] Remove usage of whitelist, blacklist, slave, etc.
* [ARROW-9181](https://issues.apache.org/jira/browse/ARROW-9181) - [C++] Instantiate fewer templates in Cast kernel implementation
* [ARROW-9182](https://issues.apache.org/jira/browse/ARROW-9182) - [C++] Use "applicator" namespace for kernel operator-to-kernel functors, streamline argument unboxing
* [ARROW-9185](https://issues.apache.org/jira/browse/ARROW-9185) - [C++] [Java][Gandiva] Make llvm build optimisation configurable from java
* [ARROW-9188](https://issues.apache.org/jira/browse/ARROW-9188) - [C++] Do not always statically link Brotli libraries
* [ARROW-9189](https://issues.apache.org/jira/browse/ARROW-9189) - [Website] Improve contributor guide
* [ARROW-9190](https://issues.apache.org/jira/browse/ARROW-9190) - [Website][C++] Add blog post on efforts to make building lighter and easier
* [ARROW-9191](https://issues.apache.org/jira/browse/ARROW-9191) - [Rust] Do not panic when int96 milliseconds are negative
* [ARROW-9192](https://issues.apache.org/jira/browse/ARROW-9192) - [CI][Rust] Add support for running clippy
* [ARROW-9193](https://issues.apache.org/jira/browse/ARROW-9193) - [C++] Add method to parse date from null-terminated string
* [ARROW-9197](https://issues.apache.org/jira/browse/ARROW-9197) - [C++] Revamp numeric casts: faster performance and reduced binary size
* [ARROW-9201](https://issues.apache.org/jira/browse/ARROW-9201) - [Archery] Render-human readable table when using "archery benchmark diff"
* [ARROW-9202](https://issues.apache.org/jira/browse/ARROW-9202) - [GLib] Add GArrowDatum
* [ARROW-9203](https://issues.apache.org/jira/browse/ARROW-9203) - [Packaging][deb] Add missing gir1.2-arrow-dataset-1.0.install
* [ARROW-9204](https://issues.apache.org/jira/browse/ARROW-9204) - [C++][Flight] change records\_per\_stream to int64 in flight benchmark
* [ARROW-9206](https://issues.apache.org/jira/browse/ARROW-9206) - [C++][Flight] measure latency in flight benchmark
* [ARROW-9207](https://issues.apache.org/jira/browse/ARROW-9207) - [Python][Dataset] Clean-up internal FileSource class
* [ARROW-9210](https://issues.apache.org/jira/browse/ARROW-9210) - [C++] Use OptionalBitBlockCounter in ArrayDataInlineVisitor
* [ARROW-9214](https://issues.apache.org/jira/browse/ARROW-9214) - [C++] Avoid util::optional in favor of separate inlineable functions in arrow/visitor\_inline.h
* [ARROW-9216](https://issues.apache.org/jira/browse/ARROW-9216) - [C++][Parquet] Use BitBlockCounter for plain spaced encoding/decoding
* [ARROW-9217](https://issues.apache.org/jira/browse/ARROW-9217) - [C++][Parquet] Cover 0.01% null for the plain spaced encoding/decoding benchmark
* [ARROW-9220](https://issues.apache.org/jira/browse/ARROW-9220) - [C++] Disable relevant compute kernels if ARROW\_WITH\_UTF8PROC=OFF
* [ARROW-9222](https://issues.apache.org/jira/browse/ARROW-9222) - [Format][Proposal] Remove validity bitmap from Union types
* [ARROW-9224](https://issues.apache.org/jira/browse/ARROW-9224) - [Dev][Archery] Copy local repo on clone failure
* [ARROW-9225](https://issues.apache.org/jira/browse/ARROW-9225) - [C++][Compute] Improve counting sort
* [ARROW-9231](https://issues.apache.org/jira/browse/ARROW-9231) - [Format] Increment MetadataVersion from V4 to V5
* [ARROW-9234](https://issues.apache.org/jira/browse/ARROW-9234) - [GLib][CUDA] Add support for dictionary memo on reading record batch from buffer
* [ARROW-9241](https://issues.apache.org/jira/browse/ARROW-9241) - [C++] Add forward compatibility checks for Decimal::bitWidth
* [ARROW-9242](https://issues.apache.org/jira/browse/ARROW-9242) - [Java] Add forward compatibility checks for Decimal::bitWidth
* [ARROW-9247](https://issues.apache.org/jira/browse/ARROW-9247) - [Python] Expose BinaryArray::total\_values\_length in bindings
* [ARROW-9248](https://issues.apache.org/jira/browse/ARROW-9248) - [C++] Add "list\_size" function that returns Int32Array/Int64Array giving list cell sizes
* [ARROW-9249](https://issues.apache.org/jira/browse/ARROW-9249) - [C++] Implement "list\_parent\_indices" vector function
* [ARROW-9250](https://issues.apache.org/jira/browse/ARROW-9250) - [C++] Compact generated code in compute/kernels/scalar\_set\_lookup.cc using same method as vector\_hash.cc
* [ARROW-9251](https://issues.apache.org/jira/browse/ARROW-9251) - [C++] Move JSON testing code for integration tests to libarrow\_testing
* [ARROW-9254](https://issues.apache.org/jira/browse/ARROW-9254) - [C++] Factor out some integer casting internals so it can be reused with temporal casts
* [ARROW-9255](https://issues.apache.org/jira/browse/ARROW-9255) - [C++] Use CMake to build bundled Protobuf with CMake \>= 3.7
* [ARROW-9256](https://issues.apache.org/jira/browse/ARROW-9256) - [C++] Incorrect variable name ARROW\_CXX\_FLAGS
* [ARROW-9258](https://issues.apache.org/jira/browse/ARROW-9258) - [Format] Add V5 MetadataVersion
* [ARROW-9259](https://issues.apache.org/jira/browse/ARROW-9259) - [Format] Permit unsigned dictionary indices in Columnar.rst
* [ARROW-9262](https://issues.apache.org/jira/browse/ARROW-9262) - [Packaging][Linux][CI] Use Ubuntu 18.04 to build ARM64 packages on Travis CI
* [ARROW-9263](https://issues.apache.org/jira/browse/ARROW-9263) - [C++] Benchmark: promote RegressionSetArgs size to L2
* [ARROW-9264](https://issues.apache.org/jira/browse/ARROW-9264) - [C++] Cleanup Parquet Arrow Schema code
* [ARROW-9265](https://issues.apache.org/jira/browse/ARROW-9265) - [C++] Add support for writing MetadataVersion::V4-compatible IPC messages for compatibility with library versions <= 0.17.1
* [ARROW-9268](https://issues.apache.org/jira/browse/ARROW-9268) - [C++] Add is{alnum,alpha,...} kernels for strings
* [ARROW-9272](https://issues.apache.org/jira/browse/ARROW-9272) - [C++][Python] Reduce complexity in python to arrow conversion
* [ARROW-9276](https://issues.apache.org/jira/browse/ARROW-9276) - [Dev] Enable ARROW\_CUDA when generating API documentations
* [ARROW-9277](https://issues.apache.org/jira/browse/ARROW-9277) - [C++] Fix documentation of Reading CSV files
* [ARROW-9278](https://issues.apache.org/jira/browse/ARROW-9278) - [C++] Implement Union validity bitmap changes from ARROW-9222
* [ARROW-9280](https://issues.apache.org/jira/browse/ARROW-9280) - [Rust] Write statistics to Parquet files
* [ARROW-9281](https://issues.apache.org/jira/browse/ARROW-9281) - [R] Turn off utf8proc in R builds
* [ARROW-9283](https://issues.apache.org/jira/browse/ARROW-9283) - [Python] Expose C++ build info
* [ARROW-9287](https://issues.apache.org/jira/browse/ARROW-9287) - [C++] Implement support for unsigned dictionary indices
* [ARROW-9289](https://issues.apache.org/jira/browse/ARROW-9289) - [R] Remove deprecated functions
* [ARROW-9290](https://issues.apache.org/jira/browse/ARROW-9290) - [Rust] [Parquet] Add features to allow opting out of dependencies
* [ARROW-9291](https://issues.apache.org/jira/browse/ARROW-9291) - [R] Support fixed size binary/list types
* [ARROW-9292](https://issues.apache.org/jira/browse/ARROW-9292) - [Rust] Update feature matrix with passing tests
* [ARROW-9294](https://issues.apache.org/jira/browse/ARROW-9294) - [GLib] Add GArrowFunction
* [ARROW-9300](https://issues.apache.org/jira/browse/ARROW-9300) - [Java] Separate Netty Memory to its own module
* [ARROW-9306](https://issues.apache.org/jira/browse/ARROW-9306) - [Ruby] Add support for Arrow::RecordBatch.new(raw\_table)
* [ARROW-9307](https://issues.apache.org/jira/browse/ARROW-9307) - [Ruby] Add Arrow::RecordBatchIterator\#to\_a
* [ARROW-9308](https://issues.apache.org/jira/browse/ARROW-9308) - [Format] Add Feature enum to schema.fbs for forward compatibity
* [ARROW-9316](https://issues.apache.org/jira/browse/ARROW-9316) - [C++] Use "Dataset" instead of "Datasets"
* [ARROW-9321](https://issues.apache.org/jira/browse/ARROW-9321) - [C++][Dataset] Allow to "collect" statistics for ParquetFragment row groups if not constructed from \_metadata
* [ARROW-9322](https://issues.apache.org/jira/browse/ARROW-9322) - [R] Dataset documentation polishing
* [ARROW-9323](https://issues.apache.org/jira/browse/ARROW-9323) - [Ruby] Add Red Arrow Dataset
* [ARROW-9327](https://issues.apache.org/jira/browse/ARROW-9327) - Fix all clippy errors for arrow crate
* [ARROW-9329](https://issues.apache.org/jira/browse/ARROW-9329) - [C++][Gandiva] Implement castTimestampToDate function
* [ARROW-9331](https://issues.apache.org/jira/browse/ARROW-9331) - [C++] Improve the performance of Tensor-to-SparseTensor conversion
* [ARROW-9333](https://issues.apache.org/jira/browse/ARROW-9333) - [Python] Expose more IPC write options in Python
* [ARROW-9335](https://issues.apache.org/jira/browse/ARROW-9335) - [Website] Update website for 1.0
* [ARROW-9337](https://issues.apache.org/jira/browse/ARROW-9337) - [R] On C++ library build failure, give an unambiguous message
* [ARROW-9339](https://issues.apache.org/jira/browse/ARROW-9339) - [Rust] Comments on SIMD in Arrow README are incorrect
* [ARROW-9340](https://issues.apache.org/jira/browse/ARROW-9340) - [R] Use CRAN version of decor package
* [ARROW-9341](https://issues.apache.org/jira/browse/ARROW-9341) - [GLib] Use arrow::Datum version Take()
* [ARROW-9345](https://issues.apache.org/jira/browse/ARROW-9345) - [C++][Dataset] Expression with dictionary type should work with operand of value type
* [ARROW-9346](https://issues.apache.org/jira/browse/ARROW-9346) - [C++][Python][Dataset] Add total\_byte\_size metadata to RowGroupInfo
* [ARROW-9362](https://issues.apache.org/jira/browse/ARROW-9362) - [Java] Add support for writing MetadataVersion::V4-compatible IPC messages for compatibility with library versions <= 0.17.1
* [ARROW-9365](https://issues.apache.org/jira/browse/ARROW-9365) - [Go] Implement the rest of the typed array builders in NewBuilder
* [ARROW-9370](https://issues.apache.org/jira/browse/ARROW-9370) - [Java] Bump Netty version
* [ARROW-9374](https://issues.apache.org/jira/browse/ARROW-9374) - [C++][Python] Expose MakeArrayFromScalar
* [ARROW-9379](https://issues.apache.org/jira/browse/ARROW-9379) - [Rust] Support unsigned dictionary indices
* [ARROW-9383](https://issues.apache.org/jira/browse/ARROW-9383) - [Python] Support fsspec filesystems in Dataset API through fs handler
* [ARROW-9386](https://issues.apache.org/jira/browse/ARROW-9386) - [Rust] RecordBatch.schema() should not return &Arc<Schema\>
* [ARROW-9390](https://issues.apache.org/jira/browse/ARROW-9390) - [C++] Review compute function names
* [ARROW-9390](https://issues.apache.org/jira/browse/ARROW-9390) - [C++] Review compute function names
* [ARROW-9390](https://issues.apache.org/jira/browse/ARROW-9390) - [C++] Review compute function names
* [ARROW-9391](https://issues.apache.org/jira/browse/ARROW-9391) - [Rust] Float32 values interpreted as zero when record batch has one row
* [ARROW-9393](https://issues.apache.org/jira/browse/ARROW-9393) - [Doc] update supported types documentation for Java
* [ARROW-9395](https://issues.apache.org/jira/browse/ARROW-9395) - [Python] Provide configurable MetadataVersion in IPC API and environment variable to set default to V4 when needed
* [ARROW-9399](https://issues.apache.org/jira/browse/ARROW-9399) - [C++] Add forward compatibility checks for unrecognized future MetadataVersion
* [ARROW-9403](https://issues.apache.org/jira/browse/ARROW-9403) - [Python] add .tolist as alias of .to\_pylist
* [ARROW-9407](https://issues.apache.org/jira/browse/ARROW-9407) - [Python] Accept pd.NA as missing value in array constructor
* [ARROW-9411](https://issues.apache.org/jira/browse/ARROW-9411) - [Rust] Update dependencies
* [ARROW-9424](https://issues.apache.org/jira/browse/ARROW-9424) - [C++][Parquet] Disable writing files with LZ4 codec
* [ARROW-9425](https://issues.apache.org/jira/browse/ARROW-9425) - [Rust][DataFusion] Make ExecutionContext sharable between threads
* [ARROW-9427](https://issues.apache.org/jira/browse/ARROW-9427) - [Rust][DataFusion] Add pub fn ExecutionContext.tables()
* [ARROW-9437](https://issues.apache.org/jira/browse/ARROW-9437) - [Python][Packaging] Homebrew fails to install build dependencies in the macOS wheel builds
* [ARROW-9442](https://issues.apache.org/jira/browse/ARROW-9442) - [Python] Do not force Validate() to be called in pyarrow\_wrap\_table
* [ARROW-9445](https://issues.apache.org/jira/browse/ARROW-9445) - [Python] Revert Array.equals changes + expose comparison ops in compute
* [ARROW-9446](https://issues.apache.org/jira/browse/ARROW-9446) - [C++] Export compiler information in BuildInfo
* [ARROW-9447](https://issues.apache.org/jira/browse/ARROW-9447) - [Rust][DataFusion] Allow closures as ScalarUDFs
* [ARROW-9452](https://issues.apache.org/jira/browse/ARROW-9452) - [Rust] [DateFusion] Improve performance of parquet scan
* [ARROW-9470](https://issues.apache.org/jira/browse/ARROW-9470) - [CI][Java] Run Maven in parallel
* [ARROW-9472](https://issues.apache.org/jira/browse/ARROW-9472) - [R] Provide configurable MetadataVersion in IPC API and environment variable to set default to V4 when needed
* [ARROW-9473](https://issues.apache.org/jira/browse/ARROW-9473) - [Doc] Polishing for 1.0
* [ARROW-9478](https://issues.apache.org/jira/browse/ARROW-9478) - [C++] Improve error message on unsupported cast types
* [ARROW-9484](https://issues.apache.org/jira/browse/ARROW-9484) - [Docs] Update is\* functions to be is\_\* in the compute docs
* [ARROW-9485](https://issues.apache.org/jira/browse/ARROW-9485) - [R] Better shared library stripping
* [ARROW-9493](https://issues.apache.org/jira/browse/ARROW-9493) - [Python][Dataset] Dictionary encode string partition columns by default
* [ARROW-9509](https://issues.apache.org/jira/browse/ARROW-9509) - [Release] Don't test Gandiva in the windows wheel verification script
* [ARROW-9511](https://issues.apache.org/jira/browse/ARROW-9511) - [Packaging][Release] Set conda packages' build number to 0
* [ARROW-9514](https://issues.apache.org/jira/browse/ARROW-9514) - [Python] The new Dataset API will not work with files on Azure Blob
* [ARROW-9519](https://issues.apache.org/jira/browse/ARROW-9519) - [Rust] Improve error message when getting a field by name from schema
* [ARROW-9529](https://issues.apache.org/jira/browse/ARROW-9529) - [Dev][Release] Improvements to release verification scripts
* [ARROW-9531](https://issues.apache.org/jira/browse/ARROW-9531) - [Packaging][Release] Update conda forge dependency pins
* [PARQUET-1820](https://issues.apache.org/jira/browse/PARQUET-1820) - [C++] Use a column filter hint to inform read prefetching in Arrow reads
* [PARQUET-1843](https://issues.apache.org/jira/browse/PARQUET-1843) - [C++] Unnecessary assignment in DictDecoderImpl::Decode
* [PARQUET-1855](https://issues.apache.org/jira/browse/PARQUET-1855) - [C++] Improve documentation on MetaData ownership
* [PARQUET-1861](https://issues.apache.org/jira/browse/PARQUET-1861) - [Documentation][C++] Explain ReaderProperters.buffer\_stream\*



# Apache Arrow 0.17.1 (2020-05-18)

## Bug Fixes

* [ARROW-8503](https://issues.apache.org/jira/browse/ARROW-8503) - [Packaging][deb] Can't build apache-arrow-archive-keyring for RC
* [ARROW-8505](https://issues.apache.org/jira/browse/ARROW-8505) - [Release][C\#] "sourcelink test" is failed by Apache.Arrow.AssemblyInfo.cs
* [ARROW-8584](https://issues.apache.org/jira/browse/ARROW-8584) - [Packaging][C++] Protobuf link error in deb builds
* [ARROW-8608](https://issues.apache.org/jira/browse/ARROW-8608) - [C++] Update vendored mpark/variant.h to  latest to fix NVCC compilation issues
* [ARROW-8609](https://issues.apache.org/jira/browse/ARROW-8609) - [C++] ORC JNI bridge crashed on null arrow buffer
* [ARROW-8641](https://issues.apache.org/jira/browse/ARROW-8641) - [Python] Regression in feather: no longer supports permutation in column selection
* [ARROW-8657](https://issues.apache.org/jira/browse/ARROW-8657) - [Python][C++][Parquet] Forward compatibility issue from 0.16 to 0.17 when using version='2.0'
* [ARROW-8684](https://issues.apache.org/jira/browse/ARROW-8684) - [Python] "SystemError: Bad call flags in \_PyMethodDef\_RawFastCallDict" in Python 3.7.7 on macOS when using pyarrow wheel
* [ARROW-8694](https://issues.apache.org/jira/browse/ARROW-8694) - [Python][Parquet] parquet.read\_schema() fails when loading wide table created from Pandas DataFrame
* [ARROW-8704](https://issues.apache.org/jira/browse/ARROW-8704) - [C++] Fix Parquet crash on invalid input (OSS-Fuzz)
* [ARROW-8706](https://issues.apache.org/jira/browse/ARROW-8706) - [C++][Parquet] Tracking JIRA for PARQUET-1857 (unencrypted INT16\_MAX Parquet row group limit)
* [ARROW-8728](https://issues.apache.org/jira/browse/ARROW-8728) - [C++]  Bitmap operation may cause buffer overflow
* [ARROW-8741](https://issues.apache.org/jira/browse/ARROW-8741) - [Python][Packaging] Keep VS2015 with for the windows wheels
* [ARROW-8750](https://issues.apache.org/jira/browse/ARROW-8750) - [Python] pyarrow.feather.write\_feather does not default to lz4 compression if it's available
* [PARQUET-1857](https://issues.apache.org/jira/browse/PARQUET-1857) - [C++][Parquet] ParquetFileReader unable to read files with more than 32767 row groups


## New Features and Improvements

* [ARROW-7731](https://issues.apache.org/jira/browse/ARROW-7731) - [C++][Parquet] Support LargeListArray
* [ARROW-8501](https://issues.apache.org/jira/browse/ARROW-8501) - [Packaging][RPM] Upgrade devtoolset to 8 on CentOS 6
* [ARROW-8549](https://issues.apache.org/jira/browse/ARROW-8549) - [R] Assorted post-0.17 release cleanups
* [ARROW-8699](https://issues.apache.org/jira/browse/ARROW-8699) - [R] Fix automatic r\_to\_py conversion
* [ARROW-8758](https://issues.apache.org/jira/browse/ARROW-8758) - [R] Updates for compatibility with dplyr 1.0
* [ARROW-8786](https://issues.apache.org/jira/browse/ARROW-8786) - [Packaging][rpm] Use bundled zstd in the CentOS 8 build



# Apache Arrow 0.17.0 (2020-04-20)

## Bug Fixes

* [ARROW-1907](https://issues.apache.org/jira/browse/ARROW-1907) - [C++/Python] Feather format cannot accommodate string columns containing more than a total of 2GB of data
* [ARROW-2255](https://issues.apache.org/jira/browse/ARROW-2255) - [Developer][Integration] Serialize schema- and field-level custom metadata in integration test JSON format
* [ARROW-2587](https://issues.apache.org/jira/browse/ARROW-2587) - [Python] Unable to write StructArrays with multiple children to parquet
* [ARROW-3004](https://issues.apache.org/jira/browse/ARROW-3004) - [Documentation] Builds docs for master rather than a pinned commit
* [ARROW-3543](https://issues.apache.org/jira/browse/ARROW-3543) - [R] Better support for timestamp format and time zones in R
* [ARROW-5265](https://issues.apache.org/jira/browse/ARROW-5265) - [Python/CI] Add integration test with kartothek
* [ARROW-5473](https://issues.apache.org/jira/browse/ARROW-5473) - [C++] Build failure on googletest\_ep on Windows when using Ninja
* [ARROW-5981](https://issues.apache.org/jira/browse/ARROW-5981) - [C++] DictionaryBuilder<T\> initialization with Array can fail silently
* [ARROW-6528](https://issues.apache.org/jira/browse/ARROW-6528) - [C++] Spurious Flight test failures (port allocation failure)
* [ARROW-6547](https://issues.apache.org/jira/browse/ARROW-6547) - [C++] valgrind errors in diff-test
* [ARROW-6738](https://issues.apache.org/jira/browse/ARROW-6738) - [Java] Fix problems with current union comparison logic
* [ARROW-6757](https://issues.apache.org/jira/browse/ARROW-6757) - [Python] Creating csv.ParseOptions() causes "Windows fatal exception: access violation" with Visual Studio 2017
* [ARROW-6871](https://issues.apache.org/jira/browse/ARROW-6871) - [Java] Enhance TransferPair related parameters check and tests
* [ARROW-6872](https://issues.apache.org/jira/browse/ARROW-6872) - [C++][Python] Empty table with dictionary-columns raises ArrowNotImplementedError
* [ARROW-6890](https://issues.apache.org/jira/browse/ARROW-6890) - [Rust] [Parquet] ArrowReader fails with seg fault
* [ARROW-6895](https://issues.apache.org/jira/browse/ARROW-6895) - [C++][Parquet] parquet::arrow::ColumnReader: ByteArrayDictionaryRecordReader repeats returned values when calling \`NextBatch()\`
* [ARROW-7008](https://issues.apache.org/jira/browse/ARROW-7008) - [Python] pyarrow.chunked\_array([array]) fails on array with all-None buffers
* [ARROW-7049](https://issues.apache.org/jira/browse/ARROW-7049) - [C++] warnings building on mingw-w64
* [ARROW-7301](https://issues.apache.org/jira/browse/ARROW-7301) - [Java] Sql type DATE should correspond to DateDayVector
* [ARROW-7335](https://issues.apache.org/jira/browse/ARROW-7335) - [C++][Gandiva] Add castBIGINT, extractDay interval\_day functions in Gandiva
* [ARROW-7390](https://issues.apache.org/jira/browse/ARROW-7390) - [C++][Dataset] Concurrency race in Projector::Project
* [ARROW-7405](https://issues.apache.org/jira/browse/ARROW-7405) - [Java] ListVector isEmpty API is incorrect
* [ARROW-7466](https://issues.apache.org/jira/browse/ARROW-7466) - [CI][Java] Fix gandiva-jar-osx nightly build failure
* [ARROW-7467](https://issues.apache.org/jira/browse/ARROW-7467) - [Java] ComplexCopier does incorrect copy for Map nullable info
* [ARROW-7507](https://issues.apache.org/jira/browse/ARROW-7507) - [Rust] Bump Thrift version to 0.13 in parquet-format and parquet
* [ARROW-7520](https://issues.apache.org/jira/browse/ARROW-7520) - [R] Writing many batches causes a crash
* [ARROW-7546](https://issues.apache.org/jira/browse/ARROW-7546) - [Java] Use new implementation to concat vectors values in batch
* [ARROW-7624](https://issues.apache.org/jira/browse/ARROW-7624) - [Rust] Soundness issues via \`Buffer\` methods
* [ARROW-7628](https://issues.apache.org/jira/browse/ARROW-7628) - [Python] Better document some read\_csv corner cases
* [ARROW-7631](https://issues.apache.org/jira/browse/ARROW-7631) - [C++][Gandiva] return zero if there is an overflow while converting a decimal to a lower precision/scale
* [ARROW-7672](https://issues.apache.org/jira/browse/ARROW-7672) - [C++] NULL pointer dereference bug
* [ARROW-7680](https://issues.apache.org/jira/browse/ARROW-7680) - [C++][Dataset] Partition discovery is not working with windows path
* [ARROW-7701](https://issues.apache.org/jira/browse/ARROW-7701) - [C++] [CI] Flight test error on macOS
* [ARROW-7713](https://issues.apache.org/jira/browse/ARROW-7713) - [Java] TastLeak was put at the wrong location
* [ARROW-7722](https://issues.apache.org/jira/browse/ARROW-7722) - [Java][FlightRPC] Memory leak
* [ARROW-7734](https://issues.apache.org/jira/browse/ARROW-7734) - [C++] Segfault when comparing status with and without detail
* [ARROW-7740](https://issues.apache.org/jira/browse/ARROW-7740) - [C++] Array internals corruption in StructArray::Flatten
* [ARROW-7755](https://issues.apache.org/jira/browse/ARROW-7755) - [Python] Windows wheel cannot be installed on Python 3.8
* [ARROW-7758](https://issues.apache.org/jira/browse/ARROW-7758) - [Python] Wrong conversion of timestamps that are out of bounds for pandas (eg 0000-01-01)
* [ARROW-7760](https://issues.apache.org/jira/browse/ARROW-7760) - [Release] Fix verify-release-candidate.sh since pip3 seems to no longer be in miniconda
* [ARROW-7762](https://issues.apache.org/jira/browse/ARROW-7762) - [Python] Exceptions in ParquetWriter get ignored
* [ARROW-7766](https://issues.apache.org/jira/browse/ARROW-7766) - [Python][Packaging] Windows py38 wheels are built with wrong ABI tag
* [ARROW-7772](https://issues.apache.org/jira/browse/ARROW-7772) - [R][C++][Dataset] Unable to filter on date32 object with date64 scalar
* [ARROW-7775](https://issues.apache.org/jira/browse/ARROW-7775) - [Rust] Don't let safe code arbitrarily transmute readers and writers
* [ARROW-7777](https://issues.apache.org/jira/browse/ARROW-7777) - [Go] StructBuilder/ListBuilder index out of range panic
* [ARROW-7780](https://issues.apache.org/jira/browse/ARROW-7780) - [Release] Fix Windows wheel RC verification script given lack of "m" ABI tag in Python 3.8
* [ARROW-7781](https://issues.apache.org/jira/browse/ARROW-7781) - [C++][Dataset] Filtering on a non-existent column gives a segfault
* [ARROW-7783](https://issues.apache.org/jira/browse/ARROW-7783) - [C++] ARROW\_DATASET should enable ARROW\_COMPUTE
* [ARROW-7785](https://issues.apache.org/jira/browse/ARROW-7785) - [C++] sparse\_tensor.cc is extremely slow to compile
* [ARROW-7786](https://issues.apache.org/jira/browse/ARROW-7786) - [R] Wire up check\_metadata in Table.Equals method
* [ARROW-7789](https://issues.apache.org/jira/browse/ARROW-7789) - [R] Can't initialize arrow objects when R.oo package is loaded
* [ARROW-7791](https://issues.apache.org/jira/browse/ARROW-7791) - [C++][Parquet] Fix building error "cannot bind lvalue"
* [ARROW-7792](https://issues.apache.org/jira/browse/ARROW-7792) - [R] read\_\* functions should close connection to file
* [ARROW-7793](https://issues.apache.org/jira/browse/ARROW-7793) - [Java] If there is a leak the base allocator should release the excess memory to parent before throwing exception
* [ARROW-7794](https://issues.apache.org/jira/browse/ARROW-7794) - [Rust] cargo publish fails for arrow-flight due to relative path to Flight.proto
* [ARROW-7794](https://issues.apache.org/jira/browse/ARROW-7794) - [Rust] cargo publish fails for arrow-flight due to relative path to Flight.proto
* [ARROW-7797](https://issues.apache.org/jira/browse/ARROW-7797) - [Release][Rust] Fix arrow-flight's version in datafusion crate
* [ARROW-7802](https://issues.apache.org/jira/browse/ARROW-7802) - [C++] Support for LargeBinary and LargeString in the hash kernel
* [ARROW-7806](https://issues.apache.org/jira/browse/ARROW-7806) - [Python] Implement to\_pandas for lists of LargeBinary/String
* [ARROW-7807](https://issues.apache.org/jira/browse/ARROW-7807) - [R] Installation on RHEL 7 Cannot call io\_\_\_MemoryMappedFile\_\_Open()
* [ARROW-7809](https://issues.apache.org/jira/browse/ARROW-7809) - [R] vignette does not run on Win 10 nor ubuntu
* [ARROW-7813](https://issues.apache.org/jira/browse/ARROW-7813) - [Rust] Fix undefined behaviour and and remove unsafe
* [ARROW-7815](https://issues.apache.org/jira/browse/ARROW-7815) - [C++] Fix crashes on corrupt IPC input (OSS-Fuzz)
* [ARROW-7827](https://issues.apache.org/jira/browse/ARROW-7827) - [Python] conda-forge pyarrow package does not have s3 enabled
* [ARROW-7832](https://issues.apache.org/jira/browse/ARROW-7832) - [R] Patches to 0.16.0 release
* [ARROW-7836](https://issues.apache.org/jira/browse/ARROW-7836) - [Rust] "allocate\_aligned"/"reallocate" need to initialize memory to avoid UB
* [ARROW-7837](https://issues.apache.org/jira/browse/ARROW-7837) - [Java] bug in BaseVariableWidthVector.copyFromSafe results with an index out of bounds exception
* [ARROW-7838](https://issues.apache.org/jira/browse/ARROW-7838) - [C++] Installed plasma-store-server fails finding Boost
* [ARROW-7841](https://issues.apache.org/jira/browse/ARROW-7841) - [C++] HADOOP\_HOME doesn't work to find libhdfs.so
* [ARROW-7844](https://issues.apache.org/jira/browse/ARROW-7844) - [R] array\_to\_vector is not thread safe
* [ARROW-7848](https://issues.apache.org/jira/browse/ARROW-7848) - Add doc for MapType
* [ARROW-7852](https://issues.apache.org/jira/browse/ARROW-7852) - [Python] 0.16.0 wheels not compatible with older numpy
* [ARROW-7857](https://issues.apache.org/jira/browse/ARROW-7857) - [Python] Failing test with pandas master for extension type conversion
* [ARROW-7861](https://issues.apache.org/jira/browse/ARROW-7861) - [C++][Parquet] Add fuzz regression corpus for parquet reader
* [ARROW-7884](https://issues.apache.org/jira/browse/ARROW-7884) - [C++][Python] Crash in pq.read\_table()
* [ARROW-7887](https://issues.apache.org/jira/browse/ARROW-7887) - [Rust] Filter kernel does not support temporal types
* [ARROW-7889](https://issues.apache.org/jira/browse/ARROW-7889) - [Rust] Datafusion CLI does not support registering Parquet files
* [ARROW-7899](https://issues.apache.org/jira/browse/ARROW-7899) - [Integration][Java] null type integration test
* [ARROW-7908](https://issues.apache.org/jira/browse/ARROW-7908) - [R] Can't install package without setting LIBARROW\_DOWNLOAD=true
* [ARROW-7922](https://issues.apache.org/jira/browse/ARROW-7922) - [CI][Crossbow] Nightly macOS wheel builds fail (brew bundle edition)
* [ARROW-7923](https://issues.apache.org/jira/browse/ARROW-7923) - [CI][Crossbow] macOS autobrew fails on homebrew-versions
* [ARROW-7926](https://issues.apache.org/jira/browse/ARROW-7926) - [Developer] "archery lint" target is not ergonomic for running a single check like IWYU
* [ARROW-7928](https://issues.apache.org/jira/browse/ARROW-7928) - [Python] Example of flight server and client not working
* [ARROW-7931](https://issues.apache.org/jira/browse/ARROW-7931) - [C++] Fix crash on corrupt Map array input (OSS-Fuzz)
* [ARROW-7936](https://issues.apache.org/jira/browse/ARROW-7936) - [Python] FileSystem.from\_uri test fails on python 3.5
* [ARROW-7940](https://issues.apache.org/jira/browse/ARROW-7940) - [C++] Unable to generate cmake build with settings other than default
* [ARROW-7944](https://issues.apache.org/jira/browse/ARROW-7944) - [Python] Test failures without Pandas
* [ARROW-7956](https://issues.apache.org/jira/browse/ARROW-7956) - [Python] Memory leak in pyarrow functions .ipc.serialize\_pandas/deserialize\_pandas
* [ARROW-7958](https://issues.apache.org/jira/browse/ARROW-7958) - [Java] Update Avro to version 1.9.2
* [ARROW-7962](https://issues.apache.org/jira/browse/ARROW-7962) - [R][Dataset] Followup to "Consolidate Source and Dataset classes"
* [ARROW-7968](https://issues.apache.org/jira/browse/ARROW-7968) - [C++] orc\_ep build fails on 64-bit Raspbian
* [ARROW-7973](https://issues.apache.org/jira/browse/ARROW-7973) - [Developer][C++] ResourceWarnings in run\_cpplint.py
* [ARROW-7974](https://issues.apache.org/jira/browse/ARROW-7974) - [Developer][C++] ResourceWarning in "make check-format"
* [ARROW-7975](https://issues.apache.org/jira/browse/ARROW-7975) - [C++] Do not include padding bytes in "Buffer" IPC metadata accounting
* [ARROW-7978](https://issues.apache.org/jira/browse/ARROW-7978) - [Developer] GitHub Actions "lint" task is running include-what-you-use and failing
* [ARROW-7980](https://issues.apache.org/jira/browse/ARROW-7980) - [Python] Deserialization with pyarrow fails for certain Timestamp-based data frame
* [ARROW-7981](https://issues.apache.org/jira/browse/ARROW-7981) - [C++][Dataset] Fails to compile on gcc 5.4
* [ARROW-7985](https://issues.apache.org/jira/browse/ARROW-7985) - [C++] ListBuilder.Finish fails if underlying value builder is empty and .Reserve'd
* [ARROW-7990](https://issues.apache.org/jira/browse/ARROW-7990) - [C++][Developer] Add "archery lint" option for running "iwyu.sh all"
* [ARROW-7992](https://issues.apache.org/jira/browse/ARROW-7992) - [C++] MSVC warning causing Appveyor failure in sort\_to\_indices.cc
* [ARROW-7996](https://issues.apache.org/jira/browse/ARROW-7996) - [Python] Error serializing empty pandas DataFrame with pyarrow
* [ARROW-7997](https://issues.apache.org/jira/browse/ARROW-7997) - [Python] Schema equals method with inconsistent docs in pyarrow
* [ARROW-7999](https://issues.apache.org/jira/browse/ARROW-7999) - [C++] Fix crash on corrupt Map array input (OSS-Fuzz)
* [ARROW-8000](https://issues.apache.org/jira/browse/ARROW-8000) - [C++] gcc 4.8 build failures
* [ARROW-8003](https://issues.apache.org/jira/browse/ARROW-8003) - [C++] -DBZip2\_SOURCE=BUNDLED fails when building with clang
* [ARROW-8006](https://issues.apache.org/jira/browse/ARROW-8006) - [C++] Unsafe arrow dictionary recovered from parquet
* [ARROW-8007](https://issues.apache.org/jira/browse/ARROW-8007) - [Python] Remove unused and defunct assert\_get\_object\_equal in plasma tests
* [ARROW-8008](https://issues.apache.org/jira/browse/ARROW-8008) - [C++/Python] Framework Python is preferred even though not the activated one
* [ARROW-8009](https://issues.apache.org/jira/browse/ARROW-8009) - [Java] Fix the hash code methods for BitVector
* [ARROW-8011](https://issues.apache.org/jira/browse/ARROW-8011) - [C++] Some buffers not resized when reading from Parquet
* [ARROW-8013](https://issues.apache.org/jira/browse/ARROW-8013) - [Python][Packaging] Fix manylinux wheels
* [ARROW-8021](https://issues.apache.org/jira/browse/ARROW-8021) - [Python] Appveyor does not appear to be including pandas in test runs
* [ARROW-8029](https://issues.apache.org/jira/browse/ARROW-8029) - [R] rstudio/r-base:3.6-centos7 GHA build failing on master
* [ARROW-8036](https://issues.apache.org/jira/browse/ARROW-8036) - [C++] Compilation failure with gtest 1.10.0
* [ARROW-8042](https://issues.apache.org/jira/browse/ARROW-8042) - [Python] pyarrow.ChunkedArray docstring is incorrect regarding zero-length ChunkedArray having no chunks
* [ARROW-8057](https://issues.apache.org/jira/browse/ARROW-8057) - [Python] Don't check Schema metadata in \_\_eq\_\_ and \_\_ne\_\_
* [ARROW-8070](https://issues.apache.org/jira/browse/ARROW-8070) - [C++] Cast segfaults on unsupported cast from list<binary\> to utf8
* [ARROW-8071](https://issues.apache.org/jira/browse/ARROW-8071) - [GLib] Build error with configure
* [ARROW-8075](https://issues.apache.org/jira/browse/ARROW-8075) - [R] Loading R.utils after arrow breaks some arrow functions
* [ARROW-8088](https://issues.apache.org/jira/browse/ARROW-8088) - [C++][Dataset] Partition columns with specified dictionary type result in all nulls
* [ARROW-8091](https://issues.apache.org/jira/browse/ARROW-8091) - [CI][Crossbow] Fix nightly homebrew and R failures
* [ARROW-8092](https://issues.apache.org/jira/browse/ARROW-8092) - [CI][Crossbow] OSX wheels fail on bundled bzip2
* [ARROW-8094](https://issues.apache.org/jira/browse/ARROW-8094) - [CI][Crossbow] Nightly valgrind test fails
* [ARROW-8095](https://issues.apache.org/jira/browse/ARROW-8095) - [CI][Crossbow] Nightly turbodbc job fails
* [ARROW-8098](https://issues.apache.org/jira/browse/ARROW-8098) - [go] Checkptr Failures on Go 1.14
* [ARROW-8099](https://issues.apache.org/jira/browse/ARROW-8099) - [Integration] archery integration --with-LANG flags don't work
* [ARROW-8101](https://issues.apache.org/jira/browse/ARROW-8101) - [FlightRPC][Java] Can't read/write only an empty null array
* [ARROW-8102](https://issues.apache.org/jira/browse/ARROW-8102) - [Dev] Crossbow's version detection doesn't work in the comment bot's scenario
* [ARROW-8105](https://issues.apache.org/jira/browse/ARROW-8105) - [Python] pyarrow.array segfaults when passed masked array with shrunken mask
* [ARROW-8106](https://issues.apache.org/jira/browse/ARROW-8106) - [Python] Builds on master broken by pandas 1.0.2 release
* [ARROW-8110](https://issues.apache.org/jira/browse/ARROW-8110) - [C\#] BuildArrays fails if NestedType is included
* [ARROW-8112](https://issues.apache.org/jira/browse/ARROW-8112) - [FlightRPC][C++] Some status codes don't round-trip through gRPC
* [ARROW-8119](https://issues.apache.org/jira/browse/ARROW-8119) - [Dev] Make Yaml optional dependency for archery
* [ARROW-8122](https://issues.apache.org/jira/browse/ARROW-8122) - [Python] Empty numpy arrays with shape cannot be deserialized
* [ARROW-8125](https://issues.apache.org/jira/browse/ARROW-8125) - [C++] "arrow-tests" target broken with ninja build
* [ARROW-8127](https://issues.apache.org/jira/browse/ARROW-8127) - [C++] [Parquet] Incorrect column chunk metadata for multipage batch writes
* [ARROW-8128](https://issues.apache.org/jira/browse/ARROW-8128) - [C\#] NestedType children serialized on wrong length
* [ARROW-8132](https://issues.apache.org/jira/browse/ARROW-8132) - [C++] arrow-s3fs-test failing on master
* [ARROW-8133](https://issues.apache.org/jira/browse/ARROW-8133) - [CI] Github Actions sometimes fail to checkout Arrow
* [ARROW-8136](https://issues.apache.org/jira/browse/ARROW-8136) - [C++][Python] Creating dataset from relative path no longer working
* [ARROW-8136](https://issues.apache.org/jira/browse/ARROW-8136) - [C++][Python] Creating dataset from relative path no longer working
* [ARROW-8138](https://issues.apache.org/jira/browse/ARROW-8138) - [C++] parquet::arrow::FileReader cannot read multiple RowGroup
* [ARROW-8139](https://issues.apache.org/jira/browse/ARROW-8139) - [C++] FileSystem enum causes attributes warning
* [ARROW-8142](https://issues.apache.org/jira/browse/ARROW-8142) - [C++] Casting a chunked array with 0 chunks critical failure
* [ARROW-8144](https://issues.apache.org/jira/browse/ARROW-8144) - [CI] Cmake 3.2 nightly build fails
* [ARROW-8154](https://issues.apache.org/jira/browse/ARROW-8154) - [Python] HDFS Filesystem does not set environment variables in  pyarrow 0.16.0 release
* [ARROW-8159](https://issues.apache.org/jira/browse/ARROW-8159) - [Python] pyarrow.Schema.from\_pandas doesn't support ExtensionDtype
* [ARROW-8166](https://issues.apache.org/jira/browse/ARROW-8166) - [C++] AVX512 intrinsics fail to compile with clang-8 on Ubuntu 18.04
* [ARROW-8176](https://issues.apache.org/jira/browse/ARROW-8176) - [FlightRPC][Integration] Have Flight services bind to port 0 in integration
* [ARROW-8186](https://issues.apache.org/jira/browse/ARROW-8186) - [Python] Dataset expression != returns bool instead of expression for invalid value
* [ARROW-8188](https://issues.apache.org/jira/browse/ARROW-8188) - [R] Adapt to latest checks in R-devel
* [ARROW-8193](https://issues.apache.org/jira/browse/ARROW-8193) - [C++] arrow-future-test fails to compile on gcc 4.8
* [ARROW-8197](https://issues.apache.org/jira/browse/ARROW-8197) - [Rust] DataFusion "create\_physical\_plan" returns incorrect schema?
* [ARROW-8206](https://issues.apache.org/jira/browse/ARROW-8206) - [R] Minor fix for backwards compatibility on Linux installation
* [ARROW-8209](https://issues.apache.org/jira/browse/ARROW-8209) - [Python] Accessing duplicate column of Table by name gives wrong error
* [ARROW-8213](https://issues.apache.org/jira/browse/ARROW-8213) - [Python][Dataset] Opening a dataset with a local incorrect path gives confusing error message
* [ARROW-8216](https://issues.apache.org/jira/browse/ARROW-8216) - [R][C++][Dataset] Filtering returns all-missing rows where the filtering column is missing
* [ARROW-8217](https://issues.apache.org/jira/browse/ARROW-8217) - [R][C++] Fix crashing test in test-dataset.R on 32-bit Windows from ARROW-7979
* [ARROW-8219](https://issues.apache.org/jira/browse/ARROW-8219) - [Rust] sqlparser crate needs to be bumped to version 0.2.5
* [ARROW-8223](https://issues.apache.org/jira/browse/ARROW-8223) - [Python] Schema.from\_pandas breaks with pandas nullable integer dtype
* [ARROW-8233](https://issues.apache.org/jira/browse/ARROW-8233) - [CI] Build timeouts on "AMD64 Windows MinGW 64 GLib & Ruby "
* [ARROW-8234](https://issues.apache.org/jira/browse/ARROW-8234) - [CI] Build timeouts on "AMD64 Windows RTools 35"
* [ARROW-8236](https://issues.apache.org/jira/browse/ARROW-8236) - [Rust] Linting GitHub Actions task failing
* [ARROW-8237](https://issues.apache.org/jira/browse/ARROW-8237) - [Python] Review Developer build instructions for conda and non-conda users
* [ARROW-8237](https://issues.apache.org/jira/browse/ARROW-8237) - [Python] Review Developer build instructions for conda and non-conda users
* [ARROW-8238](https://issues.apache.org/jira/browse/ARROW-8238) - [C++][Compute] Failed to build compute tests on windows with msvc2015
* [ARROW-8239](https://issues.apache.org/jira/browse/ARROW-8239) - [Java] fix param checks in splitAndTransfer method
* [ARROW-8245](https://issues.apache.org/jira/browse/ARROW-8245) - [Python][Parquet] Skip hidden directories when reading partitioned parquet files
* [ARROW-8254](https://issues.apache.org/jira/browse/ARROW-8254) - [Rust] [DataFusion] CLI is not working as expected
* [ARROW-8255](https://issues.apache.org/jira/browse/ARROW-8255) - [Rust] [DataFusion] COUNT(\*) results in confusing error
* [ARROW-8259](https://issues.apache.org/jira/browse/ARROW-8259) - [Rust] [DataFusion] ProjectionPushDownRule does not rewrite LIMIT
* [ARROW-8268](https://issues.apache.org/jira/browse/ARROW-8268) - [Ruby] Test failure due to lack of built ZSTD support
* [ARROW-8269](https://issues.apache.org/jira/browse/ARROW-8269) - [Python] Failure in "nopandas" build in test\_parquet\_row\_group\_fragments
* [ARROW-8270](https://issues.apache.org/jira/browse/ARROW-8270) - [Python][Flight] Example Flight server with TLS's certificate and key is not working
* [ARROW-8272](https://issues.apache.org/jira/browse/ARROW-8272) - [CI][Python] Test failure on Ubuntu 16.04
* [ARROW-8274](https://issues.apache.org/jira/browse/ARROW-8274) - [C++] Use LZ4 frame format for "LZ4" compression in IPC write
* [ARROW-8276](https://issues.apache.org/jira/browse/ARROW-8276) - [C++][Dataset] Scanning a Fragment does not take into account the partition columns
* [ARROW-8280](https://issues.apache.org/jira/browse/ARROW-8280) - [C++] MinGW builds failing due to CARES-related toolchain issue
* [ARROW-8286](https://issues.apache.org/jira/browse/ARROW-8286) - [Python] Creating dataset from pathlib results in UnionDataset instead of FileSystemDataset
* [ARROW-8298](https://issues.apache.org/jira/browse/ARROW-8298) - [C++][CI] MinGW builds fail building grpc
* [ARROW-8303](https://issues.apache.org/jira/browse/ARROW-8303) - [Python] Fix test failure caused by non-deterministic dict key ordering on Python 3.5
* [ARROW-8304](https://issues.apache.org/jira/browse/ARROW-8304) - [Flight][Python] Flight client with TLS root certificate is reporting error on do\_get()
* [ARROW-8305](https://issues.apache.org/jira/browse/ARROW-8305) - [Java] ExtensionTypeVector should make sure underlyingVector not null
* [ARROW-8310](https://issues.apache.org/jira/browse/ARROW-8310) - [C++] Minio's exceptions not recognized by IsConnectError()
* [ARROW-8315](https://issues.apache.org/jira/browse/ARROW-8315) - [Python][Dataset] Don't rely on ordered dict keys in test\_dataset.py
* [ARROW-8323](https://issues.apache.org/jira/browse/ARROW-8323) - [C++] Pin gRPC at v1.27 to avoid compilation error in its headers
* [ARROW-8326](https://issues.apache.org/jira/browse/ARROW-8326) - [C++] Don't use deprecated TYPED\_TEST\_CASE
* [ARROW-8327](https://issues.apache.org/jira/browse/ARROW-8327) - [FlightRPC][Java] gRPC trailers may be null
* [ARROW-8331](https://issues.apache.org/jira/browse/ARROW-8331) - [C++] arrow-compute-filter-benchmark fails to compile
* [ARROW-8333](https://issues.apache.org/jira/browse/ARROW-8333) - [C++][CI] Always compile benchmarks in some C++ CI entry
* [ARROW-8334](https://issues.apache.org/jira/browse/ARROW-8334) - [C++] [Gandiva] Missing DATE32 in LLVM Types / Simple D32 Compute Functions
* [ARROW-8342](https://issues.apache.org/jira/browse/ARROW-8342) - [Python] dask and kartothek integration tests are failing
* [ARROW-8345](https://issues.apache.org/jira/browse/ARROW-8345) - [Python] feather.read\_table should not require pandas
* [ARROW-8346](https://issues.apache.org/jira/browse/ARROW-8346) - [CI][Ruby] GLib/Ruby macOS build fails on zlib
* [ARROW-8349](https://issues.apache.org/jira/browse/ARROW-8349) - [CI][NIGHTLY:gandiva-jar-osx] Use latest pygit2
* [ARROW-8353](https://issues.apache.org/jira/browse/ARROW-8353) - [C++] is\_nullable maybe not initialized in parquet writer
* [ARROW-8354](https://issues.apache.org/jira/browse/ARROW-8354) - [R] Fix segfault in Table to Array conversion
* [ARROW-8357](https://issues.apache.org/jira/browse/ARROW-8357) - [Rust] [DataFusion] Dockerfile for CLI is missing format dir
* [ARROW-8358](https://issues.apache.org/jira/browse/ARROW-8358) - [C++] Fix -Wrange-loop-construct warnings in clang-11
* [ARROW-8365](https://issues.apache.org/jira/browse/ARROW-8365) - [C++] Error when writing files to S3 larger than 5 GB
* [ARROW-8366](https://issues.apache.org/jira/browse/ARROW-8366) - [Rust] Need to revert recent arrow-flight build change
* [ARROW-8369](https://issues.apache.org/jira/browse/ARROW-8369) - [CI] Fix crossbow wildcard groups
* [ARROW-8373](https://issues.apache.org/jira/browse/ARROW-8373) - [GLib] Problems resolving gobject-introspection, arrow in Meson builds
* [ARROW-8380](https://issues.apache.org/jira/browse/ARROW-8380) - [RUST] StringDictionaryBuilder not publicly exported from arrow::array
* [ARROW-8384](https://issues.apache.org/jira/browse/ARROW-8384) - [C++][Python] arrow/filesystem/hdfs.h and Python wrapper does not have an option for setting a path to a Kerberos ticket
* [ARROW-8386](https://issues.apache.org/jira/browse/ARROW-8386) - [Python] pyarrow.jvm raises error for empty Arrays
* [ARROW-8388](https://issues.apache.org/jira/browse/ARROW-8388) - [C++] GCC 4.8 fails to move on return
* [ARROW-8397](https://issues.apache.org/jira/browse/ARROW-8397) - [C++] Fail to compile aggregate\_test.cc on Ubuntu 16.04
* [ARROW-8406](https://issues.apache.org/jira/browse/ARROW-8406) - [Python] test\_fs fails when run from a different drive on Windows
* [ARROW-8410](https://issues.apache.org/jira/browse/ARROW-8410) - [C++] CMake fails on aarch64 systems that do not support -march=armv8-a+crc+crypto
* [ARROW-8414](https://issues.apache.org/jira/browse/ARROW-8414) - [Python] Non-deterministic row order failure in test\_parquet.py
* [ARROW-8414](https://issues.apache.org/jira/browse/ARROW-8414) - [Python] Non-deterministic row order failure in test\_parquet.py
* [ARROW-8414](https://issues.apache.org/jira/browse/ARROW-8414) - [Python] Non-deterministic row order failure in test\_parquet.py
* [ARROW-8415](https://issues.apache.org/jira/browse/ARROW-8415) - [C++][Packaging] fix gandiva linux job
* [ARROW-8416](https://issues.apache.org/jira/browse/ARROW-8416) - [Python] Provide a "feather" alias in the dataset API
* [ARROW-8420](https://issues.apache.org/jira/browse/ARROW-8420) - [C++] CMake fails to configure on armv7l platform (e.g. Raspberry Pi 3)
* [ARROW-8427](https://issues.apache.org/jira/browse/ARROW-8427) - [C++][Dataset] Do not ignore file paths with underscore/dot when full path was specified
* [ARROW-8428](https://issues.apache.org/jira/browse/ARROW-8428) - [C++][NIGHTLY:gandiva-jar-trusty] GCC 4.8 failures in C++ unit tests
* [ARROW-8429](https://issues.apache.org/jira/browse/ARROW-8429) - [C++] Fix Buffer::CopySlice on 0-sized buffer
* [ARROW-8432](https://issues.apache.org/jira/browse/ARROW-8432) - [Python][CI] Failure to download Hadoop
* [ARROW-8437](https://issues.apache.org/jira/browse/ARROW-8437) - [C++] Remove std::move return value from MakeRandomNullBitmap test utility
* [ARROW-8438](https://issues.apache.org/jira/browse/ARROW-8438) - [C++] arrow-io-memory-benchmark crashes
* [ARROW-8439](https://issues.apache.org/jira/browse/ARROW-8439) - [Python] Filesystem docs are outdated
* [ARROW-8441](https://issues.apache.org/jira/browse/ARROW-8441) - [C++] Fix crashes on invalid input (OSS-Fuzz)
* [ARROW-8442](https://issues.apache.org/jira/browse/ARROW-8442) - [Python] NullType.to\_pandas\_dtype inconsisent with dtype returned in to\_pandas/to\_numpy
* [ARROW-8460](https://issues.apache.org/jira/browse/ARROW-8460) - [Packaging][deb] Ubuntu Focal build is failed
* [ARROW-8465](https://issues.apache.org/jira/browse/ARROW-8465) - [Packaging][Python] Windows py35 wheel build fails because of boost
* [ARROW-8466](https://issues.apache.org/jira/browse/ARROW-8466) - [Packaging] The python unittests are not running in the windows wheel builds
* [ARROW-8468](https://issues.apache.org/jira/browse/ARROW-8468) - [Document] Fix the incorrect null bits description
* [ARROW-8469](https://issues.apache.org/jira/browse/ARROW-8469) - [Dev] Fix nightly docker tests on azure
* [ARROW-8478](https://issues.apache.org/jira/browse/ARROW-8478) - [Java] Rollback contrib package changes.
* [ARROW-8498](https://issues.apache.org/jira/browse/ARROW-8498) - [Python] Schema.from\_pandas fails on extension type, while Table.from\_pandas works
* [PARQUET-1780](https://issues.apache.org/jira/browse/PARQUET-1780) - [C++] Set ColumnMetadata.encoding\_stats field
* [PARQUET-1788](https://issues.apache.org/jira/browse/PARQUET-1788) - [C++] ColumnWriter has undefined behavior when writing arrow chunks
* [PARQUET-1797](https://issues.apache.org/jira/browse/PARQUET-1797) - [C++] Fix fuzzing errors
* [PARQUET-1799](https://issues.apache.org/jira/browse/PARQUET-1799) - [C++] Stream API: Relax schema checking when reading
* [PARQUET-1810](https://issues.apache.org/jira/browse/PARQUET-1810) - [C++] Fix undefined behaviour on invalid enum values (OSS-Fuzz)
* [PARQUET-1813](https://issues.apache.org/jira/browse/PARQUET-1813) - [C++] Remove logging statement in unit test
* [PARQUET-1819](https://issues.apache.org/jira/browse/PARQUET-1819) - [C++] Fix crashes on corrupt IPC input (OSS-Fuzz)
* [PARQUET-1819](https://issues.apache.org/jira/browse/PARQUET-1819) - [C++] Fix crashes on corrupt IPC input (OSS-Fuzz)
* [PARQUET-1823](https://issues.apache.org/jira/browse/PARQUET-1823) - [C++] Invalid RowGroup returned when reading with parquet::arrow::FileReader-\>RowGroup(i)-\>Column(j)
* [PARQUET-1824](https://issues.apache.org/jira/browse/PARQUET-1824) - [C++] Fix crashes on invalid input (OSS-Fuzz)
* [PARQUET-1829](https://issues.apache.org/jira/browse/PARQUET-1829) - [C++] Fix crashes on invalid input (OSS-Fuzz)
* [PARQUET-1831](https://issues.apache.org/jira/browse/PARQUET-1831) - [C++] Fix crashes on invalid input (OSS-Fuzz)
* [PARQUET-1835](https://issues.apache.org/jira/browse/PARQUET-1835) - [C++] Fix crashes on invalid input (OSS-Fuzz)


## New Features and Improvements

* [ARROW-590](https://issues.apache.org/jira/browse/ARROW-590) - [Integration] Add integration tests for Union types
* [ARROW-1470](https://issues.apache.org/jira/browse/ARROW-1470) - [C++] Add BufferAllocator abstract interface
* [ARROW-1560](https://issues.apache.org/jira/browse/ARROW-1560) - [C++] Kernel implementations for "match" function
* [ARROW-1571](https://issues.apache.org/jira/browse/ARROW-1571) - [C++] Implement argsort kernels (sort indices) for integers using O(n) counting sort
* [ARROW-1581](https://issues.apache.org/jira/browse/ARROW-1581) - [Packaging] Tooling to make nightly wheels available for install
* [ARROW-1582](https://issues.apache.org/jira/browse/ARROW-1582) - [Python] Set up + document nightly conda builds for macOS
* [ARROW-1636](https://issues.apache.org/jira/browse/ARROW-1636) - [Format] Integration tests for null type
* [ARROW-2447](https://issues.apache.org/jira/browse/ARROW-2447) - [C++] Create a device abstraction
* [ARROW-2882](https://issues.apache.org/jira/browse/ARROW-2882) - [C++][Python] Support AWS Firehose partition\_scheme implementation for Parquet datasets
* [ARROW-3054](https://issues.apache.org/jira/browse/ARROW-3054) - [Packaging] Tooling to enable nightly conda packages to be updated to some anaconda.org channel
* [ARROW-3410](https://issues.apache.org/jira/browse/ARROW-3410) - [C++][Dataset] Streaming CSV reader interface for memory-constrainted environments
* [ARROW-3750](https://issues.apache.org/jira/browse/ARROW-3750) - [R] Pass various wrapped Arrow objects created in Python into R with zero copy via reticulate
* [ARROW-4120](https://issues.apache.org/jira/browse/ARROW-4120) - [Python] Define process for testing procedures that check for no macro-level memory leaks
* [ARROW-4226](https://issues.apache.org/jira/browse/ARROW-4226) - [Format][C++] Add CSF sparse tensor support
* [ARROW-4286](https://issues.apache.org/jira/browse/ARROW-4286) - [C++/R] Namespace vendored Boost
* [ARROW-4304](https://issues.apache.org/jira/browse/ARROW-4304) - [Rust] Enhance documentation for arrow
* [ARROW-4428](https://issues.apache.org/jira/browse/ARROW-4428) - [R] Feature flags for R build
* [ARROW-4482](https://issues.apache.org/jira/browse/ARROW-4482) - [Website] Add blog archive page
* [ARROW-4815](https://issues.apache.org/jira/browse/ARROW-4815) - [Rust] [DataFusion] Add support for \* in SQL projection
* [ARROW-5357](https://issues.apache.org/jira/browse/ARROW-5357) - [Rust] Add capacity field in Buffer
* [ARROW-5405](https://issues.apache.org/jira/browse/ARROW-5405) - [Documentation] Move integration testing documentation to Sphinx docs, add instructions for JavaScript
* [ARROW-5497](https://issues.apache.org/jira/browse/ARROW-5497) - [Release] Build and publish R/Java/JS docs
* [ARROW-5501](https://issues.apache.org/jira/browse/ARROW-5501) - [R] Reorganize read/write file/stream functions
* [ARROW-5510](https://issues.apache.org/jira/browse/ARROW-5510) - [Format] Feather V2 based on Arrow IPC file format, with compression support
* [ARROW-5563](https://issues.apache.org/jira/browse/ARROW-5563) - [Format] Update integration test JSON format documentation
* [ARROW-5585](https://issues.apache.org/jira/browse/ARROW-5585) - [Go] rename arrow.TypeEquals into arrow.TypeEqual
* [ARROW-5742](https://issues.apache.org/jira/browse/ARROW-5742) - [CI] Add daily / weekly Valgrind build
* [ARROW-5757](https://issues.apache.org/jira/browse/ARROW-5757) - [Python] Stop supporting Python 2.7
* [ARROW-5949](https://issues.apache.org/jira/browse/ARROW-5949) - [Rust] Implement DictionaryArray
* [ARROW-6165](https://issues.apache.org/jira/browse/ARROW-6165) - [Integration] Use multiprocessing to run integration tests on multiple CPU cores
* [ARROW-6176](https://issues.apache.org/jira/browse/ARROW-6176) - [Python] Allow to subclass ExtensionArray to attach to custom extension type
* [ARROW-6275](https://issues.apache.org/jira/browse/ARROW-6275) - [C++] Deprecate RecordBatchReader::ReadNext
* [ARROW-6393](https://issues.apache.org/jira/browse/ARROW-6393) - [C++] Add EqualOptions support in SparseTensor::Equals
* [ARROW-6479](https://issues.apache.org/jira/browse/ARROW-6479) - [C++] inline errors from external projects' build logs
* [ARROW-6510](https://issues.apache.org/jira/browse/ARROW-6510) - [Python][Filesystem] Expose nanosecond resolution mtime
* [ARROW-6666](https://issues.apache.org/jira/browse/ARROW-6666) - [Rust] [DataFusion] Implement string literal expression
* [ARROW-6724](https://issues.apache.org/jira/browse/ARROW-6724) - [C++] Add simpler static ctor for BufferOutputStream than the current Create function
* [ARROW-6821](https://issues.apache.org/jira/browse/ARROW-6821) - [C++][Parquet] Do not require Thrift compiler when building (but still require library)
* [ARROW-6823](https://issues.apache.org/jira/browse/ARROW-6823) - [C++][Python][R] Support metadata in the feather format?
* [ARROW-6829](https://issues.apache.org/jira/browse/ARROW-6829) - [Docs] Migrate integration test docs to Sphinx, fix instructions after ARROW-6466
* [ARROW-6837](https://issues.apache.org/jira/browse/ARROW-6837) - [C++/Python] access File Footer custom\_metadata
* [ARROW-6841](https://issues.apache.org/jira/browse/ARROW-6841) - [C++] Upgrade to LLVM 8
* [ARROW-6875](https://issues.apache.org/jira/browse/ARROW-6875) - [FlightRPC] Implement Criteria for ListFlights RPC / list\_flights method
* [ARROW-6915](https://issues.apache.org/jira/browse/ARROW-6915) - [Developer] Do not overwrite minor release version with merge script, even if not specified by committer
* [ARROW-6947](https://issues.apache.org/jira/browse/ARROW-6947) - [Rust] [DataFusion] Add support for scalar UDFs
* [ARROW-6996](https://issues.apache.org/jira/browse/ARROW-6996) - [Python] Expose boolean filter kernel on Table
* [ARROW-7044](https://issues.apache.org/jira/browse/ARROW-7044) - [Release] Create a post release script for the home-brew formulas
* [ARROW-7048](https://issues.apache.org/jira/browse/ARROW-7048) - [Java] Support for combining multiple vectors under VectorSchemaRoot
* [ARROW-7063](https://issues.apache.org/jira/browse/ARROW-7063) - [C++] Schema print method prints too much metadata
* [ARROW-7073](https://issues.apache.org/jira/browse/ARROW-7073) - [Java] Support concating vectors values in batch
* [ARROW-7080](https://issues.apache.org/jira/browse/ARROW-7080) - [Python][Parquet][C++] Expose parquet field\_id in Schema objects
* [ARROW-7091](https://issues.apache.org/jira/browse/ARROW-7091) - [C++] Move all factories to type\_fwd.h
* [ARROW-7119](https://issues.apache.org/jira/browse/ARROW-7119) - [C++][CI] Use scripts/util\_coredump.sh to show automatic backtraces
* [ARROW-7201](https://issues.apache.org/jira/browse/ARROW-7201) - [GLib][Gandiva] Add support for BooleanNode
* [ARROW-7202](https://issues.apache.org/jira/browse/ARROW-7202) - [R][CI] Improve rwinlib building on CI to stop re-downloading dependencies
* [ARROW-7222](https://issues.apache.org/jira/browse/ARROW-7222) - [Python][Release] Wipe any existing generated Python API documentation when updating website
* [ARROW-7233](https://issues.apache.org/jira/browse/ARROW-7233) - [C++] Add Result<T\> APIs to IPC module
* [ARROW-7256](https://issues.apache.org/jira/browse/ARROW-7256) - [C++] Remove ARROW\_MEMORY\_POOL\_DEFAULT macro
* [ARROW-7330](https://issues.apache.org/jira/browse/ARROW-7330) - [C++] Add Result<T\> to APIs to arrow/gpu
* [ARROW-7332](https://issues.apache.org/jira/browse/ARROW-7332) - [C++][Parquet] Explicitly catch status exceptions in PARQUET\_CATCH\_NOT\_OK
* [ARROW-7336](https://issues.apache.org/jira/browse/ARROW-7336) - [C++] Implement MinMax options to not skip nulls
* [ARROW-7338](https://issues.apache.org/jira/browse/ARROW-7338) - [C++] Improve InMemoryDataSource to support generator instead of static list
* [ARROW-7365](https://issues.apache.org/jira/browse/ARROW-7365) - [Python] Support FixedSizeList type in conversion to numpy/pandas
* [ARROW-7373](https://issues.apache.org/jira/browse/ARROW-7373) - [C++][Dataset] Remove FileSource
* [ARROW-7400](https://issues.apache.org/jira/browse/ARROW-7400) - [Java] Avoids the worst case for quick sort
* [ARROW-7412](https://issues.apache.org/jira/browse/ARROW-7412) - [C++][Dataset] Ensure that dataset code is robust to schemas with duplicate field names
* [ARROW-7419](https://issues.apache.org/jira/browse/ARROW-7419) - [Python] Support SparseCSCMatrix
* [ARROW-7427](https://issues.apache.org/jira/browse/ARROW-7427) - [Python] Support SparseCSFTensor
* [ARROW-7428](https://issues.apache.org/jira/browse/ARROW-7428) - [Format][C++] Add serialization for CSF sparse tensors
* [ARROW-7444](https://issues.apache.org/jira/browse/ARROW-7444) - [GLib] Add LocalFileSystem support
* [ARROW-7462](https://issues.apache.org/jira/browse/ARROW-7462) - [C++] Add CpuInfo detection for Arm64 Architecture
* [ARROW-7491](https://issues.apache.org/jira/browse/ARROW-7491) - [Java] Improve the performance of aligning
* [ARROW-7499](https://issues.apache.org/jira/browse/ARROW-7499) - [C++] CMake should collect libs when making static build
* [ARROW-7501](https://issues.apache.org/jira/browse/ARROW-7501) - [C++] CMake build\_thrift should build flex and bison if necessary
* [ARROW-7515](https://issues.apache.org/jira/browse/ARROW-7515) - [C++] Rename nonexistent and non\_existent to not\_found
* [ARROW-7524](https://issues.apache.org/jira/browse/ARROW-7524) - [C++][CI] Build parquet support in the VS2019 GitHub Actions job
* [ARROW-7530](https://issues.apache.org/jira/browse/ARROW-7530) - [Developer] Do not include list of commits from PR in squashed summary message
* [ARROW-7534](https://issues.apache.org/jira/browse/ARROW-7534) - [Java] Create a new java/contrib module
* [ARROW-7547](https://issues.apache.org/jira/browse/ARROW-7547) - [C++] [Python] [Dataset] Additional reader options in ParquetFileFormat
* [ARROW-7555](https://issues.apache.org/jira/browse/ARROW-7555) - [Python] Drop support for python 2.7
* [ARROW-7587](https://issues.apache.org/jira/browse/ARROW-7587) - [C++][Compute] Add Top-k kernel
* [ARROW-7608](https://issues.apache.org/jira/browse/ARROW-7608) - [C++][Dataset] Expose more informational properties
* [ARROW-7615](https://issues.apache.org/jira/browse/ARROW-7615) - [CI][Gandiva] Ensure that the gandiva\_jni library has only a whitelisted set of shared dependencies as part of Travis CI job
* [ARROW-7616](https://issues.apache.org/jira/browse/ARROW-7616) - [Java] Support comparing value ranges for dense union vector
* [ARROW-7625](https://issues.apache.org/jira/browse/ARROW-7625) - [GLib] Parquet GLib and Red Parquet (Ruby) do not allow specifying compression type
* [ARROW-7641](https://issues.apache.org/jira/browse/ARROW-7641) - [R] Make dataset vignette have executable code
* [ARROW-7662](https://issues.apache.org/jira/browse/ARROW-7662) - [R] Support creating ListArray from R list
* [ARROW-7664](https://issues.apache.org/jira/browse/ARROW-7664) - [C++] Extract localfs default from FileSystemFromUri
* [ARROW-7675](https://issues.apache.org/jira/browse/ARROW-7675) - [R][CI] Move Windows CI from Appveyor to GHA
* [ARROW-7679](https://issues.apache.org/jira/browse/ARROW-7679) - [R] Cleaner interface for creating UnionDataset
* [ARROW-7684](https://issues.apache.org/jira/browse/ARROW-7684) - [Rust] Provide example of Flight server for DataFusion
* [ARROW-7685](https://issues.apache.org/jira/browse/ARROW-7685) - [Developer] Add support for GitHub Actions to Crossbow
* [ARROW-7691](https://issues.apache.org/jira/browse/ARROW-7691) - [C++] Verify missing fields when walking Flatbuffers data
* [ARROW-7708](https://issues.apache.org/jira/browse/ARROW-7708) - [Release] Include PARQUET commits from git changelog in release changelogs
* [ARROW-7712](https://issues.apache.org/jira/browse/ARROW-7712) - [CI][Crossbow] Fix or delete fuzzit jobs
* [ARROW-7720](https://issues.apache.org/jira/browse/ARROW-7720) - [C++][Python] Add check\_metadata argument to Table.equals
* [ARROW-7725](https://issues.apache.org/jira/browse/ARROW-7725) - [C++] Add infrastructure for unity builds and precompiled headers
* [ARROW-7726](https://issues.apache.org/jira/browse/ARROW-7726) - [CI] [C++] Use boost binaries on Windows GHA build
* [ARROW-7729](https://issues.apache.org/jira/browse/ARROW-7729) - [Python][CI] Pin pandas version to 0.25 in the dask integration test
* [ARROW-7733](https://issues.apache.org/jira/browse/ARROW-7733) - [Developer] Install locally a new enough version of Go for release verification script
* [ARROW-7735](https://issues.apache.org/jira/browse/ARROW-7735) - [Release] conda-forge channel is missing for verifying wheels
* [ARROW-7736](https://issues.apache.org/jira/browse/ARROW-7736) - [Release] Binary verification sometimes fails with transient error
* [ARROW-7739](https://issues.apache.org/jira/browse/ARROW-7739) - [GLib] Use placement new to initialize shared\_ptr object in private structs
* [ARROW-7741](https://issues.apache.org/jira/browse/ARROW-7741) - [C++][Parquet] Incorporate new level generation logic in parquet write path with a flag to revert back to old logic
* [ARROW-7742](https://issues.apache.org/jira/browse/ARROW-7742) - [GLib] Add support for MapArray
* [ARROW-7745](https://issues.apache.org/jira/browse/ARROW-7745) - [Doc] [C++] Update Parquet documentation
* [ARROW-7749](https://issues.apache.org/jira/browse/ARROW-7749) - [C++] Link some more tests together
* [ARROW-7750](https://issues.apache.org/jira/browse/ARROW-7750) - [Release] Make the source release verification script restartable
* [ARROW-7751](https://issues.apache.org/jira/browse/ARROW-7751) - [Release] macOS wheel verification also needs arrow-testing
* [ARROW-7752](https://issues.apache.org/jira/browse/ARROW-7752) - [Release] Enable and test dataset in the verification script
* [ARROW-7754](https://issues.apache.org/jira/browse/ARROW-7754) - [C++] Result<T\> is slow
* [ARROW-7761](https://issues.apache.org/jira/browse/ARROW-7761) - [C++] Add S3 support to fs::FileSystemFromUri
* [ARROW-7764](https://issues.apache.org/jira/browse/ARROW-7764) - [C++] Builders allocate a null bitmap buffer even if there is no nulls
* [ARROW-7771](https://issues.apache.org/jira/browse/ARROW-7771) - [Developer] Use ARROW\_TMPDIR environment variable in the verification scripts instead of TMPDIR
* [ARROW-7774](https://issues.apache.org/jira/browse/ARROW-7774) - [Packaging][Python] Update macos and windows wheel filenames
* [ARROW-7787](https://issues.apache.org/jira/browse/ARROW-7787) - [Rust] Add collect to Table API
* [ARROW-7788](https://issues.apache.org/jira/browse/ARROW-7788) - [C++] Add schema conversion support for map type
* [ARROW-7790](https://issues.apache.org/jira/browse/ARROW-7790) - [Website] Update how to install Linux packages
* [ARROW-7795](https://issues.apache.org/jira/browse/ARROW-7795) - [Rust - DataFusion] Support boolean negation (NOT)
* [ARROW-7796](https://issues.apache.org/jira/browse/ARROW-7796) - [R] write\_\* functions should invisibly return their inputs
* [ARROW-7799](https://issues.apache.org/jira/browse/ARROW-7799) - [R][CI] Remove flatbuffers from homebrew formulae
* [ARROW-7804](https://issues.apache.org/jira/browse/ARROW-7804) - [C++][R] Compile error on macOS 10.11
* [ARROW-7812](https://issues.apache.org/jira/browse/ARROW-7812) - [Packaging][Python] Upgrade LLVM in manylinux1 docker image
* [ARROW-7817](https://issues.apache.org/jira/browse/ARROW-7817) - [CI] macOS R autobrew nightly failed on installing dependency from source
* [ARROW-7819](https://issues.apache.org/jira/browse/ARROW-7819) - [C++][Gandiva] Add DumpIR to Filter/Projector classes
* [ARROW-7824](https://issues.apache.org/jira/browse/ARROW-7824) - [C++][Dataset] Provide Dataset writing to IPC format
* [ARROW-7828](https://issues.apache.org/jira/browse/ARROW-7828) - [Release] Remove SSH keys for internal use
* [ARROW-7829](https://issues.apache.org/jira/browse/ARROW-7829) - [R] Test R bindings on clang
* [ARROW-7833](https://issues.apache.org/jira/browse/ARROW-7833) - [R] Make install\_arrow() actually install arrow
* [ARROW-7834](https://issues.apache.org/jira/browse/ARROW-7834) - [Release] Post release task for updating the documentations
* [ARROW-7839](https://issues.apache.org/jira/browse/ARROW-7839) - [Python][Dataset] Add IPC format to python bindings
* [ARROW-7846](https://issues.apache.org/jira/browse/ARROW-7846) - [Python][Dev] Remove last dependencies on six
* [ARROW-7847](https://issues.apache.org/jira/browse/ARROW-7847) - [Website] Write a blog post about fuzzing
* [ARROW-7849](https://issues.apache.org/jira/browse/ARROW-7849) - [Packaging][Python] Remove the remaining py27 crossbow wheel tasks from the nightlies
* [ARROW-7858](https://issues.apache.org/jira/browse/ARROW-7858) - [C++][Python] Support casting an Extension type to its storage type
* [ARROW-7859](https://issues.apache.org/jira/browse/ARROW-7859) - [R] Minor patches for CRAN submission 0.16.0.2
* [ARROW-7860](https://issues.apache.org/jira/browse/ARROW-7860) - [C++] Support cast to/from halffloat
* [ARROW-7862](https://issues.apache.org/jira/browse/ARROW-7862) - [R] Linux installation should run quieter by default
* [ARROW-7863](https://issues.apache.org/jira/browse/ARROW-7863) - [C++][Python][CI] Ensure running HDFS related tests
* [ARROW-7864](https://issues.apache.org/jira/browse/ARROW-7864) - [R] Make sure bundled installation works even if there are system packages
* [ARROW-7865](https://issues.apache.org/jira/browse/ARROW-7865) - [R] Test builds on latest Linux versions
* [ARROW-7868](https://issues.apache.org/jira/browse/ARROW-7868) - [Crossbow] Reduce GitHub API query parallelism
* [ARROW-7869](https://issues.apache.org/jira/browse/ARROW-7869) - [Python] Boost::system and boost::filesystem not necessary anymore in Python wheels
* [ARROW-7872](https://issues.apache.org/jira/browse/ARROW-7872) - [Python] Support conversion of list-of-struct in Array/Table.to\_pandas
* [ARROW-7874](https://issues.apache.org/jira/browse/ARROW-7874) - [Python][Archery] Validate docstrings with numpydoc
* [ARROW-7876](https://issues.apache.org/jira/browse/ARROW-7876) - [R] Installation fails in the documentation generation image
* [ARROW-7877](https://issues.apache.org/jira/browse/ARROW-7877) - [Packaging] Fix crossbow deployment to github artifacts
* [ARROW-7879](https://issues.apache.org/jira/browse/ARROW-7879) - [C++][Doc] Add doc for the Device API
* [ARROW-7880](https://issues.apache.org/jira/browse/ARROW-7880) - [CI][R] R sanitizer job is not really working
* [ARROW-7881](https://issues.apache.org/jira/browse/ARROW-7881) - [C++] Fix pedantic warnings
* [ARROW-7882](https://issues.apache.org/jira/browse/ARROW-7882) - [C++][Gandiva] Optimise like function for substring pattern
* [ARROW-7886](https://issues.apache.org/jira/browse/ARROW-7886) - [C++][Dataset] Consolidate Source and Dataset
* [ARROW-7888](https://issues.apache.org/jira/browse/ARROW-7888) - [Python] Allow using a more modern version of jpype in pyarrow.jvm
* [ARROW-7890](https://issues.apache.org/jira/browse/ARROW-7890) - [C++] Add Promise / Future implementation
* [ARROW-7891](https://issues.apache.org/jira/browse/ARROW-7891) - [C++] RecordBatch-\>Equals should also have a check\_metadata argument
* [ARROW-7892](https://issues.apache.org/jira/browse/ARROW-7892) - [Python] Expose FilesystemSource.format attribute
* [ARROW-7895](https://issues.apache.org/jira/browse/ARROW-7895) - [Python] Remove more python 2.7 cruft
* [ARROW-7896](https://issues.apache.org/jira/browse/ARROW-7896) - [C++] Refactor from \#include guards to \#pragma once
* [ARROW-7897](https://issues.apache.org/jira/browse/ARROW-7897) - [Packaging] Temporarily disable artifact uploading until we fix the deployment issues
* [ARROW-7898](https://issues.apache.org/jira/browse/ARROW-7898) - [Python] Reduce the number docstring violations using numpydoc
* [ARROW-7904](https://issues.apache.org/jira/browse/ARROW-7904) - [C++] Decide about Field/Schema metadata printing parameters and how much to show by default
* [ARROW-7907](https://issues.apache.org/jira/browse/ARROW-7907) - [Python] Conversion to pandas of empty table with timestamp type aborts
* [ARROW-7912](https://issues.apache.org/jira/browse/ARROW-7912) - [Format] C data interface
* [ARROW-7913](https://issues.apache.org/jira/browse/ARROW-7913) - [C++][Python][R] C++ implementation of C data interface
* [ARROW-7915](https://issues.apache.org/jira/browse/ARROW-7915) - [CI] [Python] Run tests with Python development mode enabled
* [ARROW-7916](https://issues.apache.org/jira/browse/ARROW-7916) - [C++][Dataset] Project IPC record batches to materialized fields
* [ARROW-7917](https://issues.apache.org/jira/browse/ARROW-7917) - [CMake] FindPythonInterp should check for python3
* [ARROW-7919](https://issues.apache.org/jira/browse/ARROW-7919) - [R] install\_arrow() should conda install if appropriate
* [ARROW-7920](https://issues.apache.org/jira/browse/ARROW-7920) - [R] Fill in some missing input validation
* [ARROW-7921](https://issues.apache.org/jira/browse/ARROW-7921) - [Go] Add Reset method to various components and clean up comments
* [ARROW-7927](https://issues.apache.org/jira/browse/ARROW-7927) - [C++] Fix 'cpu\_info.cc' compilation warning
* [ARROW-7929](https://issues.apache.org/jira/browse/ARROW-7929) - [C++] CMake target names differ from upstream provided names
* [ARROW-7930](https://issues.apache.org/jira/browse/ARROW-7930) - [Python][CI] Test jpype integration in CI
* [ARROW-7932](https://issues.apache.org/jira/browse/ARROW-7932) - [Rust] [Parquet] Implement array reader for temporal types
* [ARROW-7934](https://issues.apache.org/jira/browse/ARROW-7934) - [C++] Fix UriEscape for empty string
* [ARROW-7935](https://issues.apache.org/jira/browse/ARROW-7935) - [Java] Remove Netty dependency for BufferAllocator and ReferenceManager
* [ARROW-7937](https://issues.apache.org/jira/browse/ARROW-7937) - [Python][Packaging] Remove boost from the macos wheels
* [ARROW-7941](https://issues.apache.org/jira/browse/ARROW-7941) - [Rust] [DataFusion] Logical plan should support unresolved column references
* [ARROW-7943](https://issues.apache.org/jira/browse/ARROW-7943) - [C++][Parquet] Add a new level builder capable of handling nested data
* [ARROW-7947](https://issues.apache.org/jira/browse/ARROW-7947) - [Rust] [Flight] [DataFusion] Implement example for get\_schema
* [ARROW-7949](https://issues.apache.org/jira/browse/ARROW-7949) - [Developer] Update to '.gitignore' to not track user specific  'cpp/Brewfile.lock.json' file
* [ARROW-7951](https://issues.apache.org/jira/browse/ARROW-7951) - [Python][Parquet] Expose BYTE\_STREAM\_SPLIT to pyarrow
* [ARROW-7959](https://issues.apache.org/jira/browse/ARROW-7959) - [Ruby] Add support for Ruby 2.3 again
* [ARROW-7963](https://issues.apache.org/jira/browse/ARROW-7963) - [C++][Python][Dataset] Expose listing fragments
* [ARROW-7965](https://issues.apache.org/jira/browse/ARROW-7965) - [Python] Refine higher level dataset API
* [ARROW-7966](https://issues.apache.org/jira/browse/ARROW-7966) - [Integration][Flight][C++] Client should verify each batch independently
* [ARROW-7969](https://issues.apache.org/jira/browse/ARROW-7969) - [Packaging] Use cURL to upload artifacts
* [ARROW-7970](https://issues.apache.org/jira/browse/ARROW-7970) - [Packaging][Python] Use system boost to build the macos wheels
* [ARROW-7971](https://issues.apache.org/jira/browse/ARROW-7971) - [Rust] Create rowcount utility
* [ARROW-7977](https://issues.apache.org/jira/browse/ARROW-7977) - [C++] Rename fs::FileStats to fs::FileInfo
* [ARROW-7979](https://issues.apache.org/jira/browse/ARROW-7979) - [C++] Implement experimental buffer compression in IPC messages
* [ARROW-7982](https://issues.apache.org/jira/browse/ARROW-7982) - [C++] Let ArrayDataVisitor accept void-returning functions
* [ARROW-7983](https://issues.apache.org/jira/browse/ARROW-7983) - [CI][R] Nightly builds should be more verbose when they fail
* [ARROW-7984](https://issues.apache.org/jira/browse/ARROW-7984) - [R] Check for valid inputs in more places
* [ARROW-7986](https://issues.apache.org/jira/browse/ARROW-7986) - [Python] pa.Array.from\_pandas cannot convert pandas.Series containing pyspark.ml.linalg.SparseVector
* [ARROW-7987](https://issues.apache.org/jira/browse/ARROW-7987) - [CI][R] Fix for verbose nightly builds
* [ARROW-7988](https://issues.apache.org/jira/browse/ARROW-7988) - [R] Fix on.exit calls in reticulate bindings
* [ARROW-7991](https://issues.apache.org/jira/browse/ARROW-7991) - [C++][Plasma] Allow option for evicting if full when creating an object
* [ARROW-7993](https://issues.apache.org/jira/browse/ARROW-7993) - [Java] Support decimal type in ComplexCopier
* [ARROW-7994](https://issues.apache.org/jira/browse/ARROW-7994) - [CI][C++] Move AppVeyor MinGW builds to GitHub Actions
* [ARROW-7995](https://issues.apache.org/jira/browse/ARROW-7995) - [C++] IO: coalescing and caching read ranges
* [ARROW-7998](https://issues.apache.org/jira/browse/ARROW-7998) - [C++][Plasma] Make Seal requests synchronous
* [ARROW-8005](https://issues.apache.org/jira/browse/ARROW-8005) - [Website] Review and adjust any usages of Apache dist system from website / tools
* [ARROW-8014](https://issues.apache.org/jira/browse/ARROW-8014) - [C++] Provide CMake targets to test only within a given label
* [ARROW-8016](https://issues.apache.org/jira/browse/ARROW-8016) - [Developer] Fix deprecation warning in PR merge tool
* [ARROW-8018](https://issues.apache.org/jira/browse/ARROW-8018) - [C++][Parquet]Parquet Modular Encryption
* [ARROW-8024](https://issues.apache.org/jira/browse/ARROW-8024) - [R] Bindings for BinaryType and FixedBinaryType
* [ARROW-8026](https://issues.apache.org/jira/browse/ARROW-8026) - [Python] Support memoryview in addition to string value types for constructing string and binary type arrays
* [ARROW-8027](https://issues.apache.org/jira/browse/ARROW-8027) - [Developer][Integration] Add integration tests for duplicate field names
* [ARROW-8028](https://issues.apache.org/jira/browse/ARROW-8028) - [Go] Allow duplicate field names in schemas and nested types
* [ARROW-8030](https://issues.apache.org/jira/browse/ARROW-8030) - [C++][Plasma] Fix inconsistent comment style
* [ARROW-8035](https://issues.apache.org/jira/browse/ARROW-8035) - [Developer][Integration] Add integration tests for extension types
* [ARROW-8039](https://issues.apache.org/jira/browse/ARROW-8039) - [Python][Dataset] Support using dataset API in pyarrow.parquet with a minimal ParquetDataset shim
* [ARROW-8044](https://issues.apache.org/jira/browse/ARROW-8044) - [CI][NIGHTLY:gandiva-jar-osx] pygit2 needs libgit2 v1.0.x
* [ARROW-8055](https://issues.apache.org/jira/browse/ARROW-8055) - [GLib][Ruby] Add some metadata bindings to GArrowSchema
* [ARROW-8058](https://issues.apache.org/jira/browse/ARROW-8058) - [C++][Python][Dataset] Provide an option to toggle validation and schema inference in FileSystemDatasetFactoryOptions
* [ARROW-8059](https://issues.apache.org/jira/browse/ARROW-8059) - [Python] Make FileSystem objects serializable
* [ARROW-8060](https://issues.apache.org/jira/browse/ARROW-8060) - [Python] Make dataset Expression objects serializable
* [ARROW-8061](https://issues.apache.org/jira/browse/ARROW-8061) - [C++][Dataset] Ability to specify granularity of ParquetFileFragment (support row groups)
* [ARROW-8063](https://issues.apache.org/jira/browse/ARROW-8063) - [Python] Add user guide documentation for Datasets API
* [ARROW-8064](https://issues.apache.org/jira/browse/ARROW-8064) - [Dev] Implement Comment bot via Github actions
* [ARROW-8069](https://issues.apache.org/jira/browse/ARROW-8069) - [C++] Should the default value of "check\_metadata" arguments of Equals methods be "true"?
* [ARROW-8072](https://issues.apache.org/jira/browse/ARROW-8072) - [C++][Plasma] Add const constraint when parsing data
* [ARROW-8077](https://issues.apache.org/jira/browse/ARROW-8077) - [Python] Add wheel build script and Crossbow configuration for Windows on Python 3.5
* [ARROW-8079](https://issues.apache.org/jira/browse/ARROW-8079) - [Python] Implement a wrapper for KeyValueMetadata, duck-typing dict where relevant
* [ARROW-8080](https://issues.apache.org/jira/browse/ARROW-8080) - [C++] Add AVX512 build option
* [ARROW-8082](https://issues.apache.org/jira/browse/ARROW-8082) - [Java][Plasma] Add JNI list() interface
* [ARROW-8083](https://issues.apache.org/jira/browse/ARROW-8083) - [GLib] Add support for Peek() to GIOInputStream
* [ARROW-8086](https://issues.apache.org/jira/browse/ARROW-8086) - [Java] Support writing decimal from big endian byte array in UnionListWriter
* [ARROW-8087](https://issues.apache.org/jira/browse/ARROW-8087) - [C++][Dataset] Order of keys with HivePartitioning is lost in resulting schema
* [ARROW-8096](https://issues.apache.org/jira/browse/ARROW-8096) - [C++][Gandiva] Create null node of Interval type
* [ARROW-8097](https://issues.apache.org/jira/browse/ARROW-8097) - [Dev] Comment bot's crossbow command acts on the master branch
* [ARROW-8103](https://issues.apache.org/jira/browse/ARROW-8103) - [R] Make default Linux build more minimal
* [ARROW-8104](https://issues.apache.org/jira/browse/ARROW-8104) - [C++] Don't install bundled Thrift
* [ARROW-8107](https://issues.apache.org/jira/browse/ARROW-8107) - [Packaging][APT] Use HTTPS for LLVM APT repository for Debian GNU/Linux stretch
* [ARROW-8109](https://issues.apache.org/jira/browse/ARROW-8109) - [Packaging][APT] Drop support for Ubuntu Disco
* [ARROW-8117](https://issues.apache.org/jira/browse/ARROW-8117) - [Rust] [Datafusion] Allow CAST from number to timestamp
* [ARROW-8118](https://issues.apache.org/jira/browse/ARROW-8118) - [R] dim method for FileSystemDataset
* [ARROW-8120](https://issues.apache.org/jira/browse/ARROW-8120) - [Packaging][APT] Add support for Ubuntu Focal
* [ARROW-8123](https://issues.apache.org/jira/browse/ARROW-8123) - [Rust] [DataFusion] Create LogicalPlanBuilder
* [ARROW-8124](https://issues.apache.org/jira/browse/ARROW-8124) - [Rust] Update library dependencies
* [ARROW-8126](https://issues.apache.org/jira/browse/ARROW-8126) - [C++][Compute] Add Top-K kernel benchmark
* [ARROW-8129](https://issues.apache.org/jira/browse/ARROW-8129) - [C++][Compute] Refine compare sorting kernel
* [ARROW-8130](https://issues.apache.org/jira/browse/ARROW-8130) - [C++][Gandiva] Fix Dex visitor in llvm\_generator to handle interval type
* [ARROW-8140](https://issues.apache.org/jira/browse/ARROW-8140) - [Developer] Follow NullType -\> NullField change
* [ARROW-8141](https://issues.apache.org/jira/browse/ARROW-8141) - [C++] Optimize BM\_PlainDecodingBoolean performance using AVX512 Intrinsics API
* [ARROW-8145](https://issues.apache.org/jira/browse/ARROW-8145) - [C++] Rename GetTargetInfos
* [ARROW-8146](https://issues.apache.org/jira/browse/ARROW-8146) - [C++] Add per-filesystem facility to sanitize a path
* [ARROW-8150](https://issues.apache.org/jira/browse/ARROW-8150) - [Rust] Allow writing custom FileMetaData k/v pairs
* [ARROW-8151](https://issues.apache.org/jira/browse/ARROW-8151) - [Benchmarking][Dataset] Benchmark Parquet read performance with S3File
* [ARROW-8153](https://issues.apache.org/jira/browse/ARROW-8153) - [Packaging] Update the conda feedstock files and upload artifacts to Anaconda
* [ARROW-8158](https://issues.apache.org/jira/browse/ARROW-8158) - [Java] Getting length of data buffer and base variable width vector
* [ARROW-8164](https://issues.apache.org/jira/browse/ARROW-8164) - [C++][Dataset] Let datasets be viewable with non-identical schema
* [ARROW-8165](https://issues.apache.org/jira/browse/ARROW-8165) - [Packaging] Make nightly wheels available on a PyPI server
* [ARROW-8167](https://issues.apache.org/jira/browse/ARROW-8167) - [CI] Add support for skipping builds with skip pattern in pull request title
* [ARROW-8168](https://issues.apache.org/jira/browse/ARROW-8168) - [Java][Plasma] Improve Java Plasma client off-heap memory usage
* [ARROW-8177](https://issues.apache.org/jira/browse/ARROW-8177) - [Rust] Make schema\_to\_fb\_offset public
* [ARROW-8178](https://issues.apache.org/jira/browse/ARROW-8178) - [C++] Upgrade to Flatbuffers 1.12
* [ARROW-8179](https://issues.apache.org/jira/browse/ARROW-8179) - [R] Windows build script tweaking for nightly packaging on GHA
* [ARROW-8181](https://issues.apache.org/jira/browse/ARROW-8181) - [Java][FlightRPC] Expose transport error metadata
* [ARROW-8182](https://issues.apache.org/jira/browse/ARROW-8182) - [Packaging] Increment the version number detected from the latest git tag
* [ARROW-8183](https://issues.apache.org/jira/browse/ARROW-8183) - [c++][FlightRPC] Expose transport error metadata
* [ARROW-8184](https://issues.apache.org/jira/browse/ARROW-8184) - [Packaging] Use arrow-nightlies organization name on Anaconda and Gemfury to host the nightlies
* [ARROW-8185](https://issues.apache.org/jira/browse/ARROW-8185) - [Packaging] Document the available nightly wheels and conda packages
* [ARROW-8187](https://issues.apache.org/jira/browse/ARROW-8187) - [R] Make test assertions robust to i18n
* [ARROW-8191](https://issues.apache.org/jira/browse/ARROW-8191) - [Packaging][APT] Fix cmake removal in Debian GNU/Linux Stretch
* [ARROW-8192](https://issues.apache.org/jira/browse/ARROW-8192) - [C++] script for unpack avx512 intrinsics code
* [ARROW-8194](https://issues.apache.org/jira/browse/ARROW-8194) - [CI] Github Actions Windows job should run tests in parallel
* [ARROW-8195](https://issues.apache.org/jira/browse/ARROW-8195) - [CI] Remove Boost download step in Github Actions
* [ARROW-8198](https://issues.apache.org/jira/browse/ARROW-8198) - [C++] Diffing should handle null arrays
* [ARROW-8200](https://issues.apache.org/jira/browse/ARROW-8200) - [GLib] Rename garrow\_file\_system\_target\_info{,s}() to ...\_file\_info{,s}()
* [ARROW-8203](https://issues.apache.org/jira/browse/ARROW-8203) - [C\#] "dotnet pack" is failed
* [ARROW-8204](https://issues.apache.org/jira/browse/ARROW-8204) - [Rust] [DataFusion] Add support for aliased expressions in SQL
* [ARROW-8207](https://issues.apache.org/jira/browse/ARROW-8207) - [Packaging][wheel] Use LLVM 8 in manylinux2010 and manylinux2014
* [ARROW-8215](https://issues.apache.org/jira/browse/ARROW-8215) - [CI][GLib] Meson install fails in the macOS build
* [ARROW-8218](https://issues.apache.org/jira/browse/ARROW-8218) - [C++] Parallelize decompression at field level in experimental IPC compression code
* [ARROW-8220](https://issues.apache.org/jira/browse/ARROW-8220) - [Python] Make dataset FileFormat objects serializable
* [ARROW-8222](https://issues.apache.org/jira/browse/ARROW-8222) - [C++] Use bcp to make a slim boost for bundled build
* [ARROW-8224](https://issues.apache.org/jira/browse/ARROW-8224) - [C++] Remove APIs deprecated prior to 0.16.0
* [ARROW-8225](https://issues.apache.org/jira/browse/ARROW-8225) - [Rust] IPC reader must respect continuation markers
* [ARROW-8225](https://issues.apache.org/jira/browse/ARROW-8225) - [Rust] IPC reader must respect continuation markers
* [ARROW-8227](https://issues.apache.org/jira/browse/ARROW-8227) - [C++] Refine SIMD feature definitions
* [ARROW-8231](https://issues.apache.org/jira/browse/ARROW-8231) - [Rust] Parse key\_value\_metadata from parquet FileMetaData into arrow schema metadata
* [ARROW-8232](https://issues.apache.org/jira/browse/ARROW-8232) - [Python] Deprecate pa.open\_file and pa.open\_stream in favor of pa.ipc.open\_file/open\_stream
* [ARROW-8235](https://issues.apache.org/jira/browse/ARROW-8235) - [C++][Compute] Filter out nulls by default
* [ARROW-8241](https://issues.apache.org/jira/browse/ARROW-8241) - [Rust] Add convenience methods to Schema
* [ARROW-8242](https://issues.apache.org/jira/browse/ARROW-8242) - [C++] Flight fails to compile on GCC 4.8
* [ARROW-8243](https://issues.apache.org/jira/browse/ARROW-8243) - [Rust] [DataFusion] Fix inconsistent API in LogicalPlanBuilder
* [ARROW-8244](https://issues.apache.org/jira/browse/ARROW-8244) - [Python][Parquet] Add \`write\_to\_dataset\` option to populate the "file\_path" metadata fields
* [ARROW-8246](https://issues.apache.org/jira/browse/ARROW-8246) - [C++] Add -Wa,-mbig-obj when compiling with MinGW to avoid linking errors
* [ARROW-8247](https://issues.apache.org/jira/browse/ARROW-8247) - [Python] Expose Parquet writing "engine" setting in pyarrow.parquet.write\_table
* [ARROW-8249](https://issues.apache.org/jira/browse/ARROW-8249) - [Rust] [DataFusion] Make Table and LogicalPlanBuilder APIs more consistent
* [ARROW-8252](https://issues.apache.org/jira/browse/ARROW-8252) - [CI][Ruby] Add Ubuntu 20.04
* [ARROW-8256](https://issues.apache.org/jira/browse/ARROW-8256) - [Rust] [DataFusion] Update CLI documentation for 0.17.0 release
* [ARROW-8264](https://issues.apache.org/jira/browse/ARROW-8264) - [Rust] [DataFusion] Create utility for printing record batches
* [ARROW-8266](https://issues.apache.org/jira/browse/ARROW-8266) - [C++] Add backup mirrors for external project source downloads
* [ARROW-8267](https://issues.apache.org/jira/browse/ARROW-8267) - [CI][GLib] Failed to build on Ubuntu 16.04
* [ARROW-8271](https://issues.apache.org/jira/browse/ARROW-8271) - [Packaging] Allow wheel upload failures to gemfury
* [ARROW-8275](https://issues.apache.org/jira/browse/ARROW-8275) - [Python][Docs] Review Feather + IPC file documentation per "Feather V2" changes
* [ARROW-8277](https://issues.apache.org/jira/browse/ARROW-8277) - [Python] RecordBatch interface improvements
* [ARROW-8279](https://issues.apache.org/jira/browse/ARROW-8279) - [C++] Do not export symbols from Codec implementations, remove need for PIMPL pattern
* [ARROW-8288](https://issues.apache.org/jira/browse/ARROW-8288) - [Python] Expose with\_ modifiers on DataType
* [ARROW-8290](https://issues.apache.org/jira/browse/ARROW-8290) - [Python][Dataset] Improve ergonomy of the FileSystemDataset constructor
* [ARROW-8291](https://issues.apache.org/jira/browse/ARROW-8291) - [Packaging] Conda nightly builds can't locate Numpy
* [ARROW-8292](https://issues.apache.org/jira/browse/ARROW-8292) - [Python][Dataset] Passthrough schema to Factory.finish() in dataset() function
* [ARROW-8294](https://issues.apache.org/jira/browse/ARROW-8294) - [Format][Flight] Add DoExchange RPC to Flight protocol
* [ARROW-8295](https://issues.apache.org/jira/browse/ARROW-8295) - [C++][Dataset] IpcFileFormat should expliclity push down column projection
* [ARROW-8299](https://issues.apache.org/jira/browse/ARROW-8299) - [C++] Reusable "optional ParallelFor" function for optional use of multithreading
* [ARROW-8300](https://issues.apache.org/jira/browse/ARROW-8300) - [R] Documentation and changelog updates for 0.17
* [ARROW-8307](https://issues.apache.org/jira/browse/ARROW-8307) - [Python] Expose use\_memory\_map option in pyarrow.feather APIs
* [ARROW-8308](https://issues.apache.org/jira/browse/ARROW-8308) - [Rust] [Flight] Implement DoExchange on examples
* [ARROW-8309](https://issues.apache.org/jira/browse/ARROW-8309) - [CI] C++/Java/Rust workflows should trigger on changes to Flight.proto
* [ARROW-8311](https://issues.apache.org/jira/browse/ARROW-8311) - [C++] Add push style stream format reader
* [ARROW-8316](https://issues.apache.org/jira/browse/ARROW-8316) - [CI] Set docker-compose to use docker-cli instead of docker-py for building images
* [ARROW-8319](https://issues.apache.org/jira/browse/ARROW-8319) - [CI] Install thrift compiler in the debian build
* [ARROW-8320](https://issues.apache.org/jira/browse/ARROW-8320) - [Documentation][Format] Clarify (lack of) alignment requirements in C data interface
* [ARROW-8321](https://issues.apache.org/jira/browse/ARROW-8321) - [CI] Use bundled thrift in Fedora 30 build
* [ARROW-8322](https://issues.apache.org/jira/browse/ARROW-8322) - [CI] Fix C\# workflow file syntax
* [ARROW-8325](https://issues.apache.org/jira/browse/ARROW-8325) - [R][CI] Stop including boost in R windows bundle
* [ARROW-8329](https://issues.apache.org/jira/browse/ARROW-8329) - [Documentation][C++] Undocumented FilterOptions argument in Filter kernel
* [ARROW-8330](https://issues.apache.org/jira/browse/ARROW-8330) - [Documentation] The post release script generates the documentation with a development version
* [ARROW-8332](https://issues.apache.org/jira/browse/ARROW-8332) - [C++] Require Thrift compiler to use system libthrift for Parquet build
* [ARROW-8335](https://issues.apache.org/jira/browse/ARROW-8335) - [Release] Add crossbow jobs to run release verification
* [ARROW-8336](https://issues.apache.org/jira/browse/ARROW-8336) - [Packaging][deb] Use libthrift-dev on Debian 10 and Ubuntu 19.10 or later
* [ARROW-8341](https://issues.apache.org/jira/browse/ARROW-8341) - [Packaging][deb] Fail to build by no disk space
* [ARROW-8343](https://issues.apache.org/jira/browse/ARROW-8343) - [GLib] Add GArrowRecordBatchIterator
* [ARROW-8347](https://issues.apache.org/jira/browse/ARROW-8347) - [C++] Add Result<T\> APIs to Array methods
* [ARROW-8351](https://issues.apache.org/jira/browse/ARROW-8351) - [R][CI] Store the Rtools-built Arrow C++ library as a build artifact
* [ARROW-8352](https://issues.apache.org/jira/browse/ARROW-8352) - [R] Add install\_pyarrow()
* [ARROW-8356](https://issues.apache.org/jira/browse/ARROW-8356) - [Developer] Support \* wildcards with "crossbow submit" via GitHub actions
* [ARROW-8361](https://issues.apache.org/jira/browse/ARROW-8361) - [C++] Add Result<T\> APIs to Buffer methods and functions
* [ARROW-8362](https://issues.apache.org/jira/browse/ARROW-8362) - [Crossbow] Ensure that the locally generated version is used in the docker tasks
* [ARROW-8367](https://issues.apache.org/jira/browse/ARROW-8367) - [C++] Deprecate Buffer::FromString(..., pool)
* [ARROW-8368](https://issues.apache.org/jira/browse/ARROW-8368) - [Format] In C interface, clarify resource management for consumers needing only a subset of child fields in ArrowArray
* [ARROW-8370](https://issues.apache.org/jira/browse/ARROW-8370) - [C++] Add Result<T\> to type / schema APIs
* [ARROW-8371](https://issues.apache.org/jira/browse/ARROW-8371) - [Crossbow] Implement and exercise sanity checks for tasks.yml
* [ARROW-8372](https://issues.apache.org/jira/browse/ARROW-8372) - [C++] Add Result<T\> to table / record batch APIs
* [ARROW-8375](https://issues.apache.org/jira/browse/ARROW-8375) - [CI][R] Make Windows tests more verbose in case of segfault
* [ARROW-8376](https://issues.apache.org/jira/browse/ARROW-8376) - [R] Add experimental interface to ScanTask/RecordBatch iterators
* [ARROW-8387](https://issues.apache.org/jira/browse/ARROW-8387) - [Rust] Make schema\_to\_fb public
* [ARROW-8389](https://issues.apache.org/jira/browse/ARROW-8389) - [Integration] Run tests in parallel
* [ARROW-8390](https://issues.apache.org/jira/browse/ARROW-8390) - [R] Expose schema unification features
* [ARROW-8393](https://issues.apache.org/jira/browse/ARROW-8393) - [C++][Gandiva] Make gandiva function registry case-insensitive
* [ARROW-8396](https://issues.apache.org/jira/browse/ARROW-8396) - [Rust] Remove libc from dependencies
* [ARROW-8398](https://issues.apache.org/jira/browse/ARROW-8398) - [Python] Remove deprecation warnings originating from python tests
* [ARROW-8401](https://issues.apache.org/jira/browse/ARROW-8401) - [C++] Add AVX2/AVX512 version of ByteStreamSplitDecode/ByteStreamSplitEncode
* [ARROW-8403](https://issues.apache.org/jira/browse/ARROW-8403) - [C++] Add ToString() to ChunkedArray, Table and RecordBatch
* [ARROW-8407](https://issues.apache.org/jira/browse/ARROW-8407) - [Rust] Add rustdoc for Dictionary type
* [ARROW-8408](https://issues.apache.org/jira/browse/ARROW-8408) - [Python] Add memory\_map= toggle to pyarrow.feather.read\_feather
* [ARROW-8409](https://issues.apache.org/jira/browse/ARROW-8409) - [R] Add arrow::cpu\_count, arrow::set\_cpu\_count wrapper functions a la Python
* [ARROW-8412](https://issues.apache.org/jira/browse/ARROW-8412) - [C++][Gandiva] Fix gandiva date\_diff function definitions
* [ARROW-8433](https://issues.apache.org/jira/browse/ARROW-8433) - [R] Add feather alias for ipc format in dataset API
* [ARROW-8444](https://issues.apache.org/jira/browse/ARROW-8444) - [Documentation] Fix spelling errors across the codebase
* [ARROW-8449](https://issues.apache.org/jira/browse/ARROW-8449) - [R] Use CMAKE\_UNITY\_BUILD everywhere
* [ARROW-8450](https://issues.apache.org/jira/browse/ARROW-8450) - [Integration][C++] Implement large list/binary/utf8 integration
* [ARROW-8457](https://issues.apache.org/jira/browse/ARROW-8457) - [C++] bridge test does not take care of endianness
* [ARROW-8458](https://issues.apache.org/jira/browse/ARROW-8458) - [C++] Prefer the original mirrors for the bundled thirdparty dependencies
* [ARROW-8461](https://issues.apache.org/jira/browse/ARROW-8461) - [Packaging][deb] Use zstd package for Ubuntu Xenial
* [ARROW-8463](https://issues.apache.org/jira/browse/ARROW-8463) - [CI] Balance the nightly test builds between CircleCI, Azure and Github
* [ARROW-8679](https://issues.apache.org/jira/browse/ARROW-8679) - [Python] supporting pandas sparse series in pyarrow
* [PARQUET-458](https://issues.apache.org/jira/browse/PARQUET-458) - [C++] Implement support for DataPageV2
* [PARQUET-1663](https://issues.apache.org/jira/browse/PARQUET-1663) - [C++] Provide API to check the presence of complex data types
* [PARQUET-1716](https://issues.apache.org/jira/browse/PARQUET-1716) - [C++] Add support for BYTE\_STREAM\_SPLIT encoding
* [PARQUET-1770](https://issues.apache.org/jira/browse/PARQUET-1770) - [C++][CI] Add fuzz target for reading Parquet files
* [PARQUET-1785](https://issues.apache.org/jira/browse/PARQUET-1785) - [C++] Improve code reusability in encoding-test.cc
* [PARQUET-1786](https://issues.apache.org/jira/browse/PARQUET-1786) - [C++] Use simd to improve BYTE\_STREAM\_SPLIT decoding performance
* [PARQUET-1806](https://issues.apache.org/jira/browse/PARQUET-1806) - [C++] [CI] Improve fuzzing seed corpus
* [PARQUET-1825](https://issues.apache.org/jira/browse/PARQUET-1825) - [C++] Fix compilation error in column\_io\_benchmark.cc
* [PARQUET-1828](https://issues.apache.org/jira/browse/PARQUET-1828) - [C++] Add a SSE2 path for the ByteStreamSplit encoder implementation
* [PARQUET-1840](https://issues.apache.org/jira/browse/PARQUET-1840) - [C++] DecodeSpaced copies more values then necessary



# Apache Arrow 0.16.0 (2020-02-07)

## Bug Fixes

* [ARROW-3783](https://issues.apache.org/jira/browse/ARROW-3783) - [R] Incorrect collection of float type
* [ARROW-3962](https://issues.apache.org/jira/browse/ARROW-3962) - [Go] Support null values while reading a CSV file.
* [ARROW-4470](https://issues.apache.org/jira/browse/ARROW-4470) - [Python] Pyarrow using considerable more memory when reading partitioned Parquet file
* [ARROW-4998](https://issues.apache.org/jira/browse/ARROW-4998) - [R] R package fails to install on OSX
* [ARROW-5575](https://issues.apache.org/jira/browse/ARROW-5575) - [C++] arrowConfig.cmake includes uninstalled targets
* [ARROW-5655](https://issues.apache.org/jira/browse/ARROW-5655) - [Python] Table.from\_pydict/from\_arrays not using types in specified schema correctly
* [ARROW-5680](https://issues.apache.org/jira/browse/ARROW-5680) - [Rust] datafusion group-by tests depends on result set order
* [ARROW-6157](https://issues.apache.org/jira/browse/ARROW-6157) - [Python][C++] UnionArray with invalid data passes validation / leads to segfaults
* [ARROW-6195](https://issues.apache.org/jira/browse/ARROW-6195) - [C++] CMake fails with file not found error while bundling thrift if python is not installed
* [ARROW-6298](https://issues.apache.org/jira/browse/ARROW-6298) - [Rust] [CI] Examples are not being tested in CI
* [ARROW-6320](https://issues.apache.org/jira/browse/ARROW-6320) - [C++] Arrow utilities are linked statically
* [ARROW-6429](https://issues.apache.org/jira/browse/ARROW-6429) - [CI][Crossbow] Nightly spark integration job fails
* [ARROW-6445](https://issues.apache.org/jira/browse/ARROW-6445) - [CI][Crossbow] Nightly Gandiva jar trusty job fails
* [ARROW-6567](https://issues.apache.org/jira/browse/ARROW-6567) - [Rust] [DataFusion] SQL aggregate query execution assume grouping expressions precede aggregate expressions
* [ARROW-6581](https://issues.apache.org/jira/browse/ARROW-6581) - [C++] Fix fuzzit job submission
* [ARROW-6704](https://issues.apache.org/jira/browse/ARROW-6704) - [C++] Cast from timestamp to higher resolution does not check out of bounds timestamps
* [ARROW-6708](https://issues.apache.org/jira/browse/ARROW-6708) - [C++] "cannot find -lboost\_filesystem\_static"
* [ARROW-6728](https://issues.apache.org/jira/browse/ARROW-6728) - [C\#] Support reading and writing Date32 and Date64 arrays
* [ARROW-6736](https://issues.apache.org/jira/browse/ARROW-6736) - [Rust] [DataFusion] Aggregate expressions get evaluated repeatedly
* [ARROW-6740](https://issues.apache.org/jira/browse/ARROW-6740) - [Python] Unable to delete closed MemoryMappedFile on Windows
* [ARROW-6745](https://issues.apache.org/jira/browse/ARROW-6745) - [Rust] Fix a variety of typos
* [ARROW-6749](https://issues.apache.org/jira/browse/ARROW-6749) - [Python] Conversion of non-ns timestamp array to numpy gives wrong values
* [ARROW-6750](https://issues.apache.org/jira/browse/ARROW-6750) - [Python] Silence S3 error logs by default
* [ARROW-6761](https://issues.apache.org/jira/browse/ARROW-6761) - [Rust] Travis CI builds not respecting rust-toolchain
* [ARROW-6762](https://issues.apache.org/jira/browse/ARROW-6762) - [C++] JSON reader segfaults on newline
* [ARROW-6785](https://issues.apache.org/jira/browse/ARROW-6785) - [JS] Remove superfluous child assignment
* [ARROW-6786](https://issues.apache.org/jira/browse/ARROW-6786) - [C++] arrow-dataset-file-parquet-test is slow
* [ARROW-6795](https://issues.apache.org/jira/browse/ARROW-6795) - [C\#] Reading large Arrow files in C\# results in an exception
* [ARROW-6798](https://issues.apache.org/jira/browse/ARROW-6798) - [CI] [Rust] Improve build times by caching dependencies in the Docker image
* [ARROW-6801](https://issues.apache.org/jira/browse/ARROW-6801) - [Rust] Arrow source release tarball is missing benchmarks
* [ARROW-6806](https://issues.apache.org/jira/browse/ARROW-6806) - [C++] Segfault deserializing ListArray containing null/empty list
* [ARROW-6808](https://issues.apache.org/jira/browse/ARROW-6808) - [Ruby] Ensure requiring suitable MSYS2 package
* [ARROW-6809](https://issues.apache.org/jira/browse/ARROW-6809) - [RUBY] Gem does not install on macOS due to glib2 3.3.7 compilation failure
* [ARROW-6812](https://issues.apache.org/jira/browse/ARROW-6812) - [Java] Remove Dremio Corp. from License Header
* [ARROW-6813](https://issues.apache.org/jira/browse/ARROW-6813) - [Ruby] Arrow::Table.load with headers=true leads to exception in Arrow 0.15
* [ARROW-6820](https://issues.apache.org/jira/browse/ARROW-6820) - [C++] [Doc] [Format] Map specification and implementation inconsistent
* [ARROW-6834](https://issues.apache.org/jira/browse/ARROW-6834) - [C++] Pin gtest to 1.8.1 to triage failing Appveyor / MSVC build
* [ARROW-6835](https://issues.apache.org/jira/browse/ARROW-6835) - [Archery][CMake] Restore ARROW\_LINT\_ONLY
* [ARROW-6842](https://issues.apache.org/jira/browse/ARROW-6842) - [Website] Jekyll error building website
* [ARROW-6844](https://issues.apache.org/jira/browse/ARROW-6844) - [C++][Parquet][Python] List<scalar type\> columns read broken with 0.15.0
* [ARROW-6846](https://issues.apache.org/jira/browse/ARROW-6846) - [C++] Build failures with glog enabled
* [ARROW-6857](https://issues.apache.org/jira/browse/ARROW-6857) - [Python][C++] Segfault for dictionary\_encode on empty chunked\_array (edge case)
* [ARROW-6859](https://issues.apache.org/jira/browse/ARROW-6859) - [CI][Nightly] Disable docker layer caching for CircleCI tasks
* [ARROW-6860](https://issues.apache.org/jira/browse/ARROW-6860) - [Python] Only link libarrow\_flight.so to pyarrow.\_flight
* [ARROW-6861](https://issues.apache.org/jira/browse/ARROW-6861) - [Python] arrow-0.15.0 reading arrow-0.14.1-output Parquet dictionary column: Failure reading column: IOError: Arrow error: Invalid: Resize cannot downsize
* [ARROW-6864](https://issues.apache.org/jira/browse/ARROW-6864) - [C++] bz2 / zstd tests not enabled
* [ARROW-6867](https://issues.apache.org/jira/browse/ARROW-6867) - [FlightRPC][Java] Flight server can hang JVM on shutdown
* [ARROW-6868](https://issues.apache.org/jira/browse/ARROW-6868) - [Go] slicing Struct array does not slice child fields
* [ARROW-6869](https://issues.apache.org/jira/browse/ARROW-6869) - [C++] Dictionary "delta" building logic in builder\_dict.h produces invalid arrays
* [ARROW-6873](https://issues.apache.org/jira/browse/ARROW-6873) - [Python] Stale CColumn reference break Cython cimport pyarrow
* [ARROW-6874](https://issues.apache.org/jira/browse/ARROW-6874) - [Python] Memory leak in Table.to\_pandas() when conversion to object dtype
* [ARROW-6876](https://issues.apache.org/jira/browse/ARROW-6876) - [Python] Reading parquet file with many columns becomes slow for 0.15.0
* [ARROW-6877](https://issues.apache.org/jira/browse/ARROW-6877) - [C++] Boost not found from the correct environment
* [ARROW-6878](https://issues.apache.org/jira/browse/ARROW-6878) - [Python] pa.array() does not handle list of dicts with bytes keys correctly under python3
* [ARROW-6882](https://issues.apache.org/jira/browse/ARROW-6882) - [Python] cannot create a chunked\_array from dictionary\_encoding result
* [ARROW-6885](https://issues.apache.org/jira/browse/ARROW-6885) - [Python] Remove superfluous skipped timedelta test
* [ARROW-6886](https://issues.apache.org/jira/browse/ARROW-6886) - [C++] arrow::io header nvcc compiler warnings
* [ARROW-6898](https://issues.apache.org/jira/browse/ARROW-6898) - [Java] Fix potential memory leak in ArrowWriter and several test classes
* [ARROW-6898](https://issues.apache.org/jira/browse/ARROW-6898) - [Java] Fix potential memory leak in ArrowWriter and several test classes
* [ARROW-6899](https://issues.apache.org/jira/browse/ARROW-6899) - [Python] to\_pandas() not implemented on list<dictionary<values=string, indices=int32\>
* [ARROW-6901](https://issues.apache.org/jira/browse/ARROW-6901) - [Rust][Parquet] SerializedFileWriter writes total\_num\_rows as zero
* [ARROW-6903](https://issues.apache.org/jira/browse/ARROW-6903) - [Python] Wheels broken after ARROW-6860 changes
* [ARROW-6905](https://issues.apache.org/jira/browse/ARROW-6905) - [Packaging][OSX] Nightly builds on MacOS are failing because of brew compile timeouts
* [ARROW-6910](https://issues.apache.org/jira/browse/ARROW-6910) - [Python] pyarrow.parquet.read\_table(...) takes up lots of memory which is not released until program exits
* [ARROW-6913](https://issues.apache.org/jira/browse/ARROW-6913) - [R] Potential bug in compute.cc
* [ARROW-6914](https://issues.apache.org/jira/browse/ARROW-6914) - [CI] docker-clang-format nightly failing
* [ARROW-6922](https://issues.apache.org/jira/browse/ARROW-6922) - [Python] Pandas master build is failing (MultiIndex.levels change)
* [ARROW-6925](https://issues.apache.org/jira/browse/ARROW-6925) - [C++] Arrow fails to buld on MacOS 10.13.6 using brew gcc 7 and 8
* [ARROW-6929](https://issues.apache.org/jira/browse/ARROW-6929) - [C++] ValidateArray is out of sync with the ListArray IPC specification
* [ARROW-6937](https://issues.apache.org/jira/browse/ARROW-6937) - [Packaging][Python] Fix conda linux and OSX wheel nightly builds
* [ARROW-6938](https://issues.apache.org/jira/browse/ARROW-6938) - [Python] Windows wheel depends on zstd.dll and libbz2.dll, which are not bundled
* [ARROW-6948](https://issues.apache.org/jira/browse/ARROW-6948) - [Rust] [Parquet] Fix bool array support in arrow reader.
* [ARROW-6950](https://issues.apache.org/jira/browse/ARROW-6950) - [C++][Dataset] Add example/benchmark for reading parquet files with dataset
* [ARROW-6957](https://issues.apache.org/jira/browse/ARROW-6957) - [CI][Crossbow] Nightly R with sanitizers build fails installing dependencies
* [ARROW-6962](https://issues.apache.org/jira/browse/ARROW-6962) - [C++] [CI] Stop compiling with -Weverything
* [ARROW-6966](https://issues.apache.org/jira/browse/ARROW-6966) - [Go] 32bit memset is null
* [ARROW-6977](https://issues.apache.org/jira/browse/ARROW-6977) - [C++] Only enable jemalloc background\_thread if feature is supported
* [ARROW-6983](https://issues.apache.org/jira/browse/ARROW-6983) - [C++] Threaded task group crashes sometimes
* [ARROW-6989](https://issues.apache.org/jira/browse/ARROW-6989) - [Python][C++] Assert is triggered when decimal type inference occurs on a value with out of range precision
* [ARROW-6992](https://issues.apache.org/jira/browse/ARROW-6992) - [C++]: Undefined Behavior sanitizer build option fails with GCC
* [ARROW-6999](https://issues.apache.org/jira/browse/ARROW-6999) - [Python] KeyError: '\_\_index\_level\_0\_\_' passing Table.from\_pandas its own schema
* [ARROW-7013](https://issues.apache.org/jira/browse/ARROW-7013) - [C++] arrow-dataset pkgconfig is incomplete
* [ARROW-7020](https://issues.apache.org/jira/browse/ARROW-7020) - [Java] Fix the bugs when calculating vector hash code
* [ARROW-7021](https://issues.apache.org/jira/browse/ARROW-7021) - [Java] UnionFixedSizeListWriter decimal type should check writer index
* [ARROW-7022](https://issues.apache.org/jira/browse/ARROW-7022) - [Python] \_\_arrow\_array\_\_ does not work for ExtensionTypes in Table.from\_pandas
* [ARROW-7023](https://issues.apache.org/jira/browse/ARROW-7023) - [Python] pa.array does not use "from\_pandas" semantics for pd.Index
* [ARROW-7024](https://issues.apache.org/jira/browse/ARROW-7024) - [CI][R] Update R dependencies for Conda build
* [ARROW-7027](https://issues.apache.org/jira/browse/ARROW-7027) - [Python] pa.table(..) returns instead of raises error if passing invalid object
* [ARROW-7033](https://issues.apache.org/jira/browse/ARROW-7033) - [C++] Error in./configure step for jemalloc when building on OSX 10.14.6
* [ARROW-7045](https://issues.apache.org/jira/browse/ARROW-7045) - [R] Factor type not preserved in Parquet roundtrip
* [ARROW-7050](https://issues.apache.org/jira/browse/ARROW-7050) - [R] Fix compiler warnings in R bindings
* [ARROW-7053](https://issues.apache.org/jira/browse/ARROW-7053) - [Python] setuptools-scm produces incorrect version at apache-arrow-0.15.1 tag
* [ARROW-7056](https://issues.apache.org/jira/browse/ARROW-7056) - [Python] Test errors without S3
* [ARROW-7059](https://issues.apache.org/jira/browse/ARROW-7059) - [Python] Reading parquet file with many columns is much slower in 0.15.x versus 0.14.x
* [ARROW-7074](https://issues.apache.org/jira/browse/ARROW-7074) - [C++] ASSERT\_OK\_AND\_ASSIGN crashes when failing
* [ARROW-7077](https://issues.apache.org/jira/browse/ARROW-7077) - [C++] Unsupported Dict-\>T cast crashes instead of returning error
* [ARROW-7087](https://issues.apache.org/jira/browse/ARROW-7087) - [Python] Table Metadata disappear when we write a partitioned dataset
* [ARROW-7097](https://issues.apache.org/jira/browse/ARROW-7097) - [Rust][CI] Builds failing due to rust nightly formatting
* [ARROW-7100](https://issues.apache.org/jira/browse/ARROW-7100) - [C++] libjvm.so not found on ubuntu 19.04 with openjdk-11
* [ARROW-7105](https://issues.apache.org/jira/browse/ARROW-7105) - [CI][Crossbow] Nightly homebrew-cpp job fails
* [ARROW-7106](https://issues.apache.org/jira/browse/ARROW-7106) - [Java] Fix the problem that flight perf test hangs endlessly
* [ARROW-7117](https://issues.apache.org/jira/browse/ARROW-7117) - [C++][CI] Fix the hanging C++ tests in Windows 2019
* [ARROW-7128](https://issues.apache.org/jira/browse/ARROW-7128) - [CI] Fedora cron jobs are failing because of wrong fedora version
* [ARROW-7133](https://issues.apache.org/jira/browse/ARROW-7133) - [CI] Allow GH Actions to run on all branches
* [ARROW-7142](https://issues.apache.org/jira/browse/ARROW-7142) - [C++] Compile error with GCC 5.4.0
* [ARROW-7152](https://issues.apache.org/jira/browse/ARROW-7152) - [Java] Delete useless class DiffFunction
* [ARROW-7157](https://issues.apache.org/jira/browse/ARROW-7157) - [R] Add validation, helpful error message to Object$new()
* [ARROW-7158](https://issues.apache.org/jira/browse/ARROW-7158) - [C++][Visual Studio]Build config Error on non English Version visual studio.
* [ARROW-7163](https://issues.apache.org/jira/browse/ARROW-7163) - [Doc] Fix double-and typos
* [ARROW-7164](https://issues.apache.org/jira/browse/ARROW-7164) - [CI] Dev cron github action is failing every 15 minutes
* [ARROW-7167](https://issues.apache.org/jira/browse/ARROW-7167) - [CI][Python] Add nightly tests for older pandas versions to Github Actions
* [ARROW-7168](https://issues.apache.org/jira/browse/ARROW-7168) - [Python] pa.array() doesn't respect specified dictionary type
* [ARROW-7170](https://issues.apache.org/jira/browse/ARROW-7170) - [C++] Bundled ORC fails linking
* [ARROW-7180](https://issues.apache.org/jira/browse/ARROW-7180) - [CI] Java builds are not triggered on the master branch
* [ARROW-7181](https://issues.apache.org/jira/browse/ARROW-7181) - [Python][Nightly] Wheel builds could NOT find ArrowPython
* [ARROW-7183](https://issues.apache.org/jira/browse/ARROW-7183) - [CI][Crossbow] Re-skip r-sanitizer nightly tests
* [ARROW-7187](https://issues.apache.org/jira/browse/ARROW-7187) - [C++][Doc] doxygen broken on master because of @
* [ARROW-7188](https://issues.apache.org/jira/browse/ARROW-7188) - [C++][Doc] doxygen broken on master: missing param implicit\_casts
* [ARROW-7189](https://issues.apache.org/jira/browse/ARROW-7189) - [CI][Crossbow] Nightly conda osx builds fail
* [ARROW-7194](https://issues.apache.org/jira/browse/ARROW-7194) - [Rust] CSV Writer causing recursion errors
* [ARROW-7199](https://issues.apache.org/jira/browse/ARROW-7199) - [Java] ConcurrentModificationException in BaseAllocator::getChildAllocators
* [ARROW-7200](https://issues.apache.org/jira/browse/ARROW-7200) - [C++][Flight] Running Arrow Flight benchmark on two hosts doesn't work
* [ARROW-7209](https://issues.apache.org/jira/browse/ARROW-7209) - [Python] tests with pandas master are failing now \_\_from\_arrow\_\_ support landed in pandas
* [ARROW-7212](https://issues.apache.org/jira/browse/ARROW-7212) - "go test -bench=8192 -run=. ./math" fails
* [ARROW-7214](https://issues.apache.org/jira/browse/ARROW-7214) - [Python] unpickling a pyarrow table with dictionary fields crashes
* [ARROW-7217](https://issues.apache.org/jira/browse/ARROW-7217) - ARROW-7217: [CI][Python] Use correct python version in Github Actions
* [ARROW-7225](https://issues.apache.org/jira/browse/ARROW-7225) - [C++] \`\*std::move(Result<T\>)\` calls T copy constructor
* [ARROW-7249](https://issues.apache.org/jira/browse/ARROW-7249) - [CI] Release test fails in master due to new arrow-flight Rust crate
* [ARROW-7250](https://issues.apache.org/jira/browse/ARROW-7250) - [C++] Undefined symbols for StringToFloatConverter::Impl with clang 4.x
* [ARROW-7253](https://issues.apache.org/jira/browse/ARROW-7253) - [CI] Fix master failure with release test
* [ARROW-7254](https://issues.apache.org/jira/browse/ARROW-7254) - BaseVariableWidthVector\#setSafe appears to make value offsets inconsistent
* [ARROW-7264](https://issues.apache.org/jira/browse/ARROW-7264) - [Java] RangeEqualsVisitor type check is not correct
* [ARROW-7266](https://issues.apache.org/jira/browse/ARROW-7266) - [Python] dictionary\_encode() of a slice gives wrong result
* [ARROW-7271](https://issues.apache.org/jira/browse/ARROW-7271) - [C++][Flight] Use the single parameter version of SetTotalBytesLimit
* [ARROW-7281](https://issues.apache.org/jira/browse/ARROW-7281) - [C++] AdaptiveIntBuilder::length() does not consider pending\_pos\_.
* [ARROW-7282](https://issues.apache.org/jira/browse/ARROW-7282) - [Python] IO functions should raise FileNotFoundError when appropriate
* [ARROW-7291](https://issues.apache.org/jira/browse/ARROW-7291) - [Dev] Fix FORMAT\_DIR in update-flatbuffers.sh
* [ARROW-7294](https://issues.apache.org/jira/browse/ARROW-7294) - [Python] converted\_type\_name\_from\_enum(): Incorrect name for INT\_64
* [ARROW-7295](https://issues.apache.org/jira/browse/ARROW-7295) - [R] Fix bad test that causes failure on R < 3.5
* [ARROW-7298](https://issues.apache.org/jira/browse/ARROW-7298) - [C++] cpp/thirdparty/download-dependencies.sh is broken
* [ARROW-7314](https://issues.apache.org/jira/browse/ARROW-7314) - [Python] Compiler warning in pyarrow
* [ARROW-7318](https://issues.apache.org/jira/browse/ARROW-7318) - [C\#] TimestampArray serialization failure
* [ARROW-7320](https://issues.apache.org/jira/browse/ARROW-7320) - [C++] Target arrow-type-benchmark failed to be built on bullx Linux
* [ARROW-7327](https://issues.apache.org/jira/browse/ARROW-7327) - [CI] Failing C GLib and R buildbot builders
* [ARROW-7328](https://issues.apache.org/jira/browse/ARROW-7328) - [CI] GitHub Actions should trigger on changes to GitHub Actions configuration
* [ARROW-7341](https://issues.apache.org/jira/browse/ARROW-7341) - [CI] Unbreak nightly Conda R job
* [ARROW-7343](https://issues.apache.org/jira/browse/ARROW-7343) - [Java] Memory leak in Flight DoGet when client cancels
* [ARROW-7349](https://issues.apache.org/jira/browse/ARROW-7349) - [C++] Fix the bug of parsing string hex values
* [ARROW-7353](https://issues.apache.org/jira/browse/ARROW-7353) - [C++] Disable -Wmissing-braces when building with clang
* [ARROW-7354](https://issues.apache.org/jira/browse/ARROW-7354) - [C++] TestHadoopFileSystem::ThreadSafety fails with sigabort
* [ARROW-7355](https://issues.apache.org/jira/browse/ARROW-7355) - [CI] Environment variables are defined twice for the fuzzit builds
* [ARROW-7358](https://issues.apache.org/jira/browse/ARROW-7358) - [CI] [Dev] [C++] ccache disabled on conda-python-hdfs
* [ARROW-7359](https://issues.apache.org/jira/browse/ARROW-7359) - [C++][Gandiva] Don't throw error for locate function with start position exceeding string length, return 0 instead
* [ARROW-7360](https://issues.apache.org/jira/browse/ARROW-7360) - [R] Can't use dplyr filter() with variables defined in parent scope
* [ARROW-7361](https://issues.apache.org/jira/browse/ARROW-7361) - [Rust] Build directory is not passed to ci/scripts/rust\_test.sh
* [ARROW-7362](https://issues.apache.org/jira/browse/ARROW-7362) - [Python] ListArray.flatten() should take care of slicing offsets
* [ARROW-7374](https://issues.apache.org/jira/browse/ARROW-7374) - [Dev] [C++] cuda-cpp docker image fails compiling Arrow
* [ARROW-7381](https://issues.apache.org/jira/browse/ARROW-7381) - [C++][Packaging] Iterator change broke manylinux1 wheels
* [ARROW-7386](https://issues.apache.org/jira/browse/ARROW-7386) - [C\#] Array offset does not work properly
* [ARROW-7388](https://issues.apache.org/jira/browse/ARROW-7388) - [Python] Skip HDFS tests if libhdfs cannot be located
* [ARROW-7389](https://issues.apache.org/jira/browse/ARROW-7389) - [Python][Packaging] Remove pyarrow.s3fs import check from the recipe
* [ARROW-7393](https://issues.apache.org/jira/browse/ARROW-7393) - [Plasma] Fix plasma executable name in build for Java
* [ARROW-7395](https://issues.apache.org/jira/browse/ARROW-7395) - [C++] Logical "or" with constants is a Clang warning
* [ARROW-7397](https://issues.apache.org/jira/browse/ARROW-7397) - [C++] Json white space length detection error
* [ARROW-7404](https://issues.apache.org/jira/browse/ARROW-7404) - [C++][Gandiva] Fix utf8 char length error on Arm64
* [ARROW-7406](https://issues.apache.org/jira/browse/ARROW-7406) - [Java] NonNullableStructVector\#hashCode should pass hasher to child vectors
* [ARROW-7407](https://issues.apache.org/jira/browse/ARROW-7407) - [Python] Failed to install pyarrow 0.15.1 on Python 3.8
* [ARROW-7408](https://issues.apache.org/jira/browse/ARROW-7408) - [C++] Reference benchmarks fail compiling
* [ARROW-7435](https://issues.apache.org/jira/browse/ARROW-7435) - Security issue: ValidateOffsets() does not prevent buffer over-read
* [ARROW-7436](https://issues.apache.org/jira/browse/ARROW-7436) - [Archery] Fix benchmark default configuration
* [ARROW-7437](https://issues.apache.org/jira/browse/ARROW-7437) - [Java] ReadChannel\#readFully does not set writer index correctly
* [ARROW-7442](https://issues.apache.org/jira/browse/ARROW-7442) - [Ruby] Specifying column type as time causes segmentation fault
* [ARROW-7447](https://issues.apache.org/jira/browse/ARROW-7447) - [Java] ComplexCopier does incorrect copy in some cases
* [ARROW-7450](https://issues.apache.org/jira/browse/ARROW-7450) - [CI][C++] test-ubuntu-18.04-cpp-static failing with linking error in arrow-io-hdfs-test
* [ARROW-7458](https://issues.apache.org/jira/browse/ARROW-7458) - [GLib] incorrect build dependency in Makefile
* [ARROW-7471](https://issues.apache.org/jira/browse/ARROW-7471) - [Python] Cython flake8 failures
* [ARROW-7472](https://issues.apache.org/jira/browse/ARROW-7472) - [Java] Fix some incorrect behavior in UnionListWriter
* [ARROW-7478](https://issues.apache.org/jira/browse/ARROW-7478) - [Rust] [DataFusion] Group by expression ignored unless paired with aggregate expression
* [ARROW-7492](https://issues.apache.org/jira/browse/ARROW-7492) - [CI][Crossbow] Nightly homebrew-cpp job fails on Python installation
* [ARROW-7497](https://issues.apache.org/jira/browse/ARROW-7497) - [Python] Test asserts: pandas.util.testing is deprecated, use pandas.testing instead
* [ARROW-7500](https://issues.apache.org/jira/browse/ARROW-7500) - [C++][Dataset] regex\_error in hive partition on centos7 and opensuse42
* [ARROW-7503](https://issues.apache.org/jira/browse/ARROW-7503) - [Rust] Rust builds are failing on master
* [ARROW-7506](https://issues.apache.org/jira/browse/ARROW-7506) - [Java] JMH benchmarks should be called from main methods
* [ARROW-7508](https://issues.apache.org/jira/browse/ARROW-7508) - [C\#] DateTime32 Reading is Broken
* [ARROW-7510](https://issues.apache.org/jira/browse/ARROW-7510) - [C++] Array::null\_count() is not thread-compatible
* [ARROW-7516](https://issues.apache.org/jira/browse/ARROW-7516) - [C\#] .NET Benchmarks are broken
* [ARROW-7518](https://issues.apache.org/jira/browse/ARROW-7518) - [Python] Use PYARROW\_WITH\_HDFS when building wheels, conda packages
* [ARROW-7527](https://issues.apache.org/jira/browse/ARROW-7527) - [Python] pandas/feather tests failing on pandas master
* [ARROW-7528](https://issues.apache.org/jira/browse/ARROW-7528) - [Python] The pandas.datetime class (import of datetime.datetime) and pandas.np are deprecated
* [ARROW-7535](https://issues.apache.org/jira/browse/ARROW-7535) - [C++] ASAN failure in validation
* [ARROW-7543](https://issues.apache.org/jira/browse/ARROW-7543) - [R] arrow::write\_parquet() code examples do not work
* [ARROW-7545](https://issues.apache.org/jira/browse/ARROW-7545) - [C++] [Dataset] Scanning dataset with dictionary type hangs
* [ARROW-7551](https://issues.apache.org/jira/browse/ARROW-7551) - [FlightRPC][C++] Flight test on macOS fails due to Homebrew gRPC
* [ARROW-7552](https://issues.apache.org/jira/browse/ARROW-7552) - [C++] TestSlowInputStream is flaky
* [ARROW-7554](https://issues.apache.org/jira/browse/ARROW-7554) - [C++] Unknown CMake command "externalproject\_add".
* [ARROW-7559](https://issues.apache.org/jira/browse/ARROW-7559) - [Rust] Possibly incorrect index check assertion in StringArray and BinaryArray
* [ARROW-7561](https://issues.apache.org/jira/browse/ARROW-7561) - [Doc][Python] fix conda environment command
* [ARROW-7563](https://issues.apache.org/jira/browse/ARROW-7563) - [Rust] failed to select a version for \`byteorder\`
* [ARROW-7582](https://issues.apache.org/jira/browse/ARROW-7582) - [Rust][Flight] Unable to compile arrow.flight.protocol.rs
* [ARROW-7583](https://issues.apache.org/jira/browse/ARROW-7583) - [C++][Flight] Auth handler tests fragile on Windows
* [ARROW-7591](https://issues.apache.org/jira/browse/ARROW-7591) - [Python] DictionaryArray.to\_numpy returns dict of parts instead of numpy array
* [ARROW-7592](https://issues.apache.org/jira/browse/ARROW-7592) - [C++] Fix crashes on corrupt IPC input
* [ARROW-7593](https://issues.apache.org/jira/browse/ARROW-7593) - [CI][Python] Python datasets failing on master / not run on CI
* [ARROW-7595](https://issues.apache.org/jira/browse/ARROW-7595) - [R][CI] R appveyor job fails due to pacman compression change
* [ARROW-7596](https://issues.apache.org/jira/browse/ARROW-7596) - [Python] Only apply zero-copy DataFrame block optimizations when split\_blocks=True
* [ARROW-7599](https://issues.apache.org/jira/browse/ARROW-7599) - [Java] Fix build break due to change in RangeEqualsVisitor
* [ARROW-7603](https://issues.apache.org/jira/browse/ARROW-7603) - [CI][Crossbow] Nightly centos 8 job fails
* [ARROW-7611](https://issues.apache.org/jira/browse/ARROW-7611) - [Packaging][Python] Artifacts patterns for wheel are wrong
* [ARROW-7612](https://issues.apache.org/jira/browse/ARROW-7612) - [Packaging][Python] Artifact paths for Conda on WIndows are wrong
* [ARROW-7614](https://issues.apache.org/jira/browse/ARROW-7614) - [Python] Slow performance in test\_parquet.py::test\_set\_data\_page\_size
* [ARROW-7618](https://issues.apache.org/jira/browse/ARROW-7618) - [C++] Fix crashes or undefined behaviour on corrupt IPC input
* [ARROW-7620](https://issues.apache.org/jira/browse/ARROW-7620) - [Rust] Windows builds failing due to flatbuffer compile error
* [ARROW-7621](https://issues.apache.org/jira/browse/ARROW-7621) - [Doc] Doc build fails
* [ARROW-7634](https://issues.apache.org/jira/browse/ARROW-7634) - [Python] Dataset tests failing on Windows to parse file path
* [ARROW-7638](https://issues.apache.org/jira/browse/ARROW-7638) - [Python] Segfault when inspecting dataset.Source with invalid file/partitioning
* [ARROW-7639](https://issues.apache.org/jira/browse/ARROW-7639) - [R] Cannot convert Dictionary Array to R when values aren't strings
* [ARROW-7640](https://issues.apache.org/jira/browse/ARROW-7640) - [C++][Dataset] segfault when reading compressed Parquet files if build didn't include support for codec
* [ARROW-7647](https://issues.apache.org/jira/browse/ARROW-7647) - [C++] JSON reader fails to read arrays with few values
* [ARROW-7650](https://issues.apache.org/jira/browse/ARROW-7650) - [C++] Dataset tests not built on Windows
* [ARROW-7651](https://issues.apache.org/jira/browse/ARROW-7651) - [CI][Crossbow] Nightly macOS wheel builds fail
* [ARROW-7652](https://issues.apache.org/jira/browse/ARROW-7652) - [Python][Dataset] Insert implicit cast in ScannerBuilder.filter
* [ARROW-7661](https://issues.apache.org/jira/browse/ARROW-7661) - [Python] Non-optimal CSV chunking when no newline at end
* [ARROW-7689](https://issues.apache.org/jira/browse/ARROW-7689) - [C++] Sporadic Flight test crash on macOS
* [ARROW-7690](https://issues.apache.org/jira/browse/ARROW-7690) - [R] Cannot write parquet to OutputStream
* [ARROW-7693](https://issues.apache.org/jira/browse/ARROW-7693) - [CI] Fix test-conda-python-3.7-spark-master nightly errors
* [ARROW-7709](https://issues.apache.org/jira/browse/ARROW-7709) - [Python] Conversion from Table Column to Pandas loses name for Timestamps
* [ARROW-7714](https://issues.apache.org/jira/browse/ARROW-7714) - [Release] Variable expansion is missing
* [ARROW-7718](https://issues.apache.org/jira/browse/ARROW-7718) - [Release] Fix auto-retry in the binary release script
* [ARROW-7723](https://issues.apache.org/jira/browse/ARROW-7723) - [Python] StructArray  timestamp type with timezone to\_pandas convert error
* [ARROW-7727](https://issues.apache.org/jira/browse/ARROW-7727) - [Python] Unable to read a ParquetDataset when schema validation is on.
* [ARROW-8135](https://issues.apache.org/jira/browse/ARROW-8135) - [Python] Problem importing PyArrow on a cluster
* [ARROW-8638](https://issues.apache.org/jira/browse/ARROW-8638) - Arrow Cython API Usage Gives an error when calling CTable API Endpoints
* [PARQUET-1692](https://issues.apache.org/jira/browse/PARQUET-1692) - [C++] LogicalType::FromThrift error on Centos 7 RPM
* [PARQUET-1692](https://issues.apache.org/jira/browse/PARQUET-1692) - [C++] LogicalType::FromThrift error on Centos 7 RPM
* [PARQUET-1693](https://issues.apache.org/jira/browse/PARQUET-1693) - [C++] Build examples don't account for CMAKE compression feature flags
* [PARQUET-1702](https://issues.apache.org/jira/browse/PARQUET-1702) - [C++] Make BufferedRowGroupWriter compatible with parquet encryption
* [PARQUET-1706](https://issues.apache.org/jira/browse/PARQUET-1706) - [C++] Wrong dictionary\_page\_offset when writing only data pages via BufferedPageWriter
* [PARQUET-1707](https://issues.apache.org/jira/browse/PARQUET-1707) - [C++] parquet-arrow-test fails with undefined behaviour sanitizer
* [PARQUET-1709](https://issues.apache.org/jira/browse/PARQUET-1709) - [C++] Avoid unnecessary temporary std::shared\_ptr copies
* [PARQUET-1715](https://issues.apache.org/jira/browse/PARQUET-1715) - [C++] Add the Parquet code samples to CI + Refactor Parquet Encryption Samples
* [PARQUET-1720](https://issues.apache.org/jira/browse/PARQUET-1720) - [C++] Parquet JSONPrint not showing version correctly
* [PARQUET-1747](https://issues.apache.org/jira/browse/PARQUET-1747) - [C++] Access to ColumnChunkMetaData fails when encryption is on
* [PARQUET-1766](https://issues.apache.org/jira/browse/PARQUET-1766) - [C++] parquet NaN/null double statistics can result in endless loop
* [PARQUET-1772](https://issues.apache.org/jira/browse/PARQUET-1772) - [C++] ParquetFileWriter: Data overwritten when output stream opened in append mode


## New Features and Improvements

* [ARROW-412](https://issues.apache.org/jira/browse/ARROW-412) - [Format] Handling of buffer padding in the IPC metadata
* [ARROW-501](https://issues.apache.org/jira/browse/ARROW-501) - [C++] Implement concurrent / buffering InputStream for streaming data use cases
* [ARROW-772](https://issues.apache.org/jira/browse/ARROW-772) - [C++] Implement take kernel functions
* [ARROW-843](https://issues.apache.org/jira/browse/ARROW-843) - [C++] Implement Schema unification, merging unequal but equivalent schemas
* [ARROW-976](https://issues.apache.org/jira/browse/ARROW-976) - [C++][Python] Provide API for defining and reading Parquet datasets with more ad hoc partition schemes
* [ARROW-1036](https://issues.apache.org/jira/browse/ARROW-1036) - [C++] Define abstract API for filtering Arrow streams (e.g. predicate evaluation)
* [ARROW-1119](https://issues.apache.org/jira/browse/ARROW-1119) - [Python/C++] Implement NativeFile interfaces for Amazon S3
* [ARROW-1175](https://issues.apache.org/jira/browse/ARROW-1175) - [Java] Implement/test dictionary-encoded subfields
* [ARROW-1456](https://issues.apache.org/jira/browse/ARROW-1456) - [Python] Run s3fs unit tests in Travis CI
* [ARROW-1562](https://issues.apache.org/jira/browse/ARROW-1562) - [C++] Numeric kernel implementations for add (+)
* [ARROW-1638](https://issues.apache.org/jira/browse/ARROW-1638) - [Java] IPC roundtrip for null type
* [ARROW-1900](https://issues.apache.org/jira/browse/ARROW-1900) - [C++] Add kernel functions for determining value range (maximum and minimum) of integer arrays
* [ARROW-2428](https://issues.apache.org/jira/browse/ARROW-2428) - [Python] Add API to map Arrow types (including extension types) to pandas ExtensionArray instances for to\_pandas conversions
* [ARROW-2602](https://issues.apache.org/jira/browse/ARROW-2602) - [Packaging] Automate build of development docker containers
* [ARROW-2863](https://issues.apache.org/jira/browse/ARROW-2863) - [Python] Add context manager APIs to RecordBatch\*Writer/Reader classes
* [ARROW-3085](https://issues.apache.org/jira/browse/ARROW-3085) - [Rust] Add an adapter for parquet.
* [ARROW-3408](https://issues.apache.org/jira/browse/ARROW-3408) - [C++] Add option to CSV reader to dictionary encode individual columns or all string / binary columns
* [ARROW-3444](https://issues.apache.org/jira/browse/ARROW-3444) - [Python] Table.nbytes attribute
* [ARROW-3706](https://issues.apache.org/jira/browse/ARROW-3706) - [Rust] Add record batch reader trait.
* [ARROW-3789](https://issues.apache.org/jira/browse/ARROW-3789) - [Python] Enable calling object in Table.to\_pandas to "self-destruct" for improved memory use
* [ARROW-3808](https://issues.apache.org/jira/browse/ARROW-3808) - [R] Implement [.arrow::Array
* [ARROW-3813](https://issues.apache.org/jira/browse/ARROW-3813) - [R] lower level construction of Dictionary Arrays
* [ARROW-4059](https://issues.apache.org/jira/browse/ARROW-4059) - [Rust] Parquet/Arrow Integration
* [ARROW-4091](https://issues.apache.org/jira/browse/ARROW-4091) - [C++] Curate default list of CSV null spellings
* [ARROW-4208](https://issues.apache.org/jira/browse/ARROW-4208) - [CI/Python] Have automatized tests for S3
* [ARROW-4219](https://issues.apache.org/jira/browse/ARROW-4219) - [Rust] [Parquet] Implement ArrowReader
* [ARROW-4223](https://issues.apache.org/jira/browse/ARROW-4223) - [Python] Support scipy.sparse integration
* [ARROW-4224](https://issues.apache.org/jira/browse/ARROW-4224) - [Python] Support integration with pydata/sparse library
* [ARROW-4225](https://issues.apache.org/jira/browse/ARROW-4225) - [Format][C++] Add CSC sparse matrix support
* [ARROW-4722](https://issues.apache.org/jira/browse/ARROW-4722) - [C++] Implement Bitmap class to modularize handling of bitmaps
* [ARROW-4748](https://issues.apache.org/jira/browse/ARROW-4748) - [Rust] [DataFusion] GROUP BY performance could be optimized
* [ARROW-4930](https://issues.apache.org/jira/browse/ARROW-4930) - [Python] Remove LIBDIR assumptions in Python build
* [ARROW-5180](https://issues.apache.org/jira/browse/ARROW-5180) - [Rust] IPC Support
* [ARROW-5181](https://issues.apache.org/jira/browse/ARROW-5181) - [Rust] Create Arrow File reader
* [ARROW-5182](https://issues.apache.org/jira/browse/ARROW-5182) - [Rust] Create Arrow File writer
* [ARROW-5227](https://issues.apache.org/jira/browse/ARROW-5227) - [Rust] [DataFusion] Re-implement query execution with an extensible physical query plan
* [ARROW-5277](https://issues.apache.org/jira/browse/ARROW-5277) - [C\#] MemoryAllocator.Allocate(length: 0) should not return null
* [ARROW-5333](https://issues.apache.org/jira/browse/ARROW-5333) - [C++] Fit build option summary into narrower console
* [ARROW-5366](https://issues.apache.org/jira/browse/ARROW-5366) - [Rust] Implement Duration and Interval Arrays
* [ARROW-5400](https://issues.apache.org/jira/browse/ARROW-5400) - [Rust] Test/ensure that reader and writer support zero-length record batches
* [ARROW-5445](https://issues.apache.org/jira/browse/ARROW-5445) - [Website] Remove language that encourages pinning a version
* [ARROW-5454](https://issues.apache.org/jira/browse/ARROW-5454) - [C++] Implement Take on ChunkedArray for DataFrame use
* [ARROW-5502](https://issues.apache.org/jira/browse/ARROW-5502) - [R] file readers should mmap
* [ARROW-5508](https://issues.apache.org/jira/browse/ARROW-5508) - [C++] Create reusable Iterator<T\> interface
* [ARROW-5523](https://issues.apache.org/jira/browse/ARROW-5523) - [Python] [Packaging] Use HTTPS consistently for downloading dependencies
* [ARROW-5712](https://issues.apache.org/jira/browse/ARROW-5712) - [C++][Parquet] Arrow time32/time64/timestamp ConvertedType not being restored properly
* [ARROW-5767](https://issues.apache.org/jira/browse/ARROW-5767) - [Format] Permit dictionary replacements in IPC protocol
* [ARROW-5801](https://issues.apache.org/jira/browse/ARROW-5801) - [CI] Dockerize (add to docker-compose) all Travis CI Linux tasks
* [ARROW-5802](https://issues.apache.org/jira/browse/ARROW-5802) - [CI] Dockerize "lint" Travis CI job
* [ARROW-5804](https://issues.apache.org/jira/browse/ARROW-5804) - [C++] Dockerize C++ CI job with conda-forge toolchain, code coverage from Travis CI
* [ARROW-5805](https://issues.apache.org/jira/browse/ARROW-5805) - [Python] Dockerize (add to docker-compose) Python Travis CI job
* [ARROW-5806](https://issues.apache.org/jira/browse/ARROW-5806) - [CI] Dockerize (add to docker-compose) Integration tests Travis CI entry
* [ARROW-5807](https://issues.apache.org/jira/browse/ARROW-5807) - [JS] Dockerize NodeJS Travis CI entry
* [ARROW-5808](https://issues.apache.org/jira/browse/ARROW-5808) - [GLib][Ruby] Dockerize (add to docker-compose) current GLib + Ruby Travis CI entry
* [ARROW-5809](https://issues.apache.org/jira/browse/ARROW-5809) - [Rust] Dockerize (add to docker-compose) Rust Travis CI build
* [ARROW-5810](https://issues.apache.org/jira/browse/ARROW-5810) - [Go] Dockerize Travis CI Go build
* [ARROW-5831](https://issues.apache.org/jira/browse/ARROW-5831) - [Release] Migrate and improve binary release verification script
* [ARROW-5839](https://issues.apache.org/jira/browse/ARROW-5839) - [Python] Test manylinux2010 in CI
* [ARROW-5855](https://issues.apache.org/jira/browse/ARROW-5855) - [Python] Add support for Duration type
* [ARROW-5859](https://issues.apache.org/jira/browse/ARROW-5859) - [Python] Support ExtentionType on conversion to numpy/pandas
* [ARROW-5971](https://issues.apache.org/jira/browse/ARROW-5971) - [Website] Blog post introducing Arrow Flight
* [ARROW-5994](https://issues.apache.org/jira/browse/ARROW-5994) - [CI] [Rust] Create nightly releases of the Rust implementation
* [ARROW-6003](https://issues.apache.org/jira/browse/ARROW-6003) - [C++] Better input validation and error messaging in CSV reader
* [ARROW-6074](https://issues.apache.org/jira/browse/ARROW-6074) - [FlightRPC] Implement middleware
* [ARROW-6091](https://issues.apache.org/jira/browse/ARROW-6091) - [Rust] [DataFusion] Implement parallel execution for limit
* [ARROW-6109](https://issues.apache.org/jira/browse/ARROW-6109) - [Integration] Docker image for integration testing can't be built on windows
* [ARROW-6112](https://issues.apache.org/jira/browse/ARROW-6112) - [Java] Update APIs to support 64-bit address space
* [ARROW-6184](https://issues.apache.org/jira/browse/ARROW-6184) - [Java] Provide hash table based dictionary encoder
* [ARROW-6251](https://issues.apache.org/jira/browse/ARROW-6251) - [Developer] Add PR merge tool to apache/arrow-site
* [ARROW-6257](https://issues.apache.org/jira/browse/ARROW-6257) - [C++] Add fnmatch compatible globbing function
* [ARROW-6274](https://issues.apache.org/jira/browse/ARROW-6274) - [Rust] [DataFusion] Add support for writing results to CSV
* [ARROW-6277](https://issues.apache.org/jira/browse/ARROW-6277) - [C++][Parquet] Support reading/writing other Parquet primitive types to DictionaryArray
* [ARROW-6283](https://issues.apache.org/jira/browse/ARROW-6283) - [Rust] [DataFusion] Implement operator to write query results to partitioned CSV
* [ARROW-6285](https://issues.apache.org/jira/browse/ARROW-6285) - [GLib] Add support for LargeBinary and LargeString types
* [ARROW-6286](https://issues.apache.org/jira/browse/ARROW-6286) - [GLib] Add support for LargeList type
* [ARROW-6299](https://issues.apache.org/jira/browse/ARROW-6299) - [C++] Simplify FileFormat classes to singletons
* [ARROW-6321](https://issues.apache.org/jira/browse/ARROW-6321) - [Python] Ability to create ExtensionBlock on conversion to pandas
* [ARROW-6340](https://issues.apache.org/jira/browse/ARROW-6340) - [R] Implements low-level bindings to Dataset classes
* [ARROW-6341](https://issues.apache.org/jira/browse/ARROW-6341) - [Python] Implement low-level bindings for Dataset
* [ARROW-6352](https://issues.apache.org/jira/browse/ARROW-6352) - [Java] Add implementation of DenseUnionVector.
* [ARROW-6367](https://issues.apache.org/jira/browse/ARROW-6367) - [C++][Gandiva] Implement string reverse
* [ARROW-6378](https://issues.apache.org/jira/browse/ARROW-6378) - [C++][Dataset] Implement TreeDataSource
* [ARROW-6386](https://issues.apache.org/jira/browse/ARROW-6386) - [C++][Documentation] Explicit documentation of null slot interpretation
* [ARROW-6394](https://issues.apache.org/jira/browse/ARROW-6394) - [Java] Support conversions between delta vector and partial sum vector
* [ARROW-6396](https://issues.apache.org/jira/browse/ARROW-6396) - [C++] Add ResolveNullOptions to Logical kernels
* [ARROW-6398](https://issues.apache.org/jira/browse/ARROW-6398) - [C++] Consolidate ScanOptions and ScanContext
* [ARROW-6405](https://issues.apache.org/jira/browse/ARROW-6405) - [Python] Add std::move wrapper for use in Cython
* [ARROW-6452](https://issues.apache.org/jira/browse/ARROW-6452) - [Java] Override ValueVector toString() method
* [ARROW-6463](https://issues.apache.org/jira/browse/ARROW-6463) - [C++][Python] Rename arrow::fs::Selector to FileSelector
* [ARROW-6466](https://issues.apache.org/jira/browse/ARROW-6466) - [Developer] Refactor integration/integration\_test.py into a proper Python package
* [ARROW-6468](https://issues.apache.org/jira/browse/ARROW-6468) - [C++] Remove unused hashing routines
* [ARROW-6473](https://issues.apache.org/jira/browse/ARROW-6473) - [Format] Clarify dictionary encoding edge cases
* [ARROW-6503](https://issues.apache.org/jira/browse/ARROW-6503) - [C++] Add an argument of memory pool object to SparseTensorConverter
* [ARROW-6508](https://issues.apache.org/jira/browse/ARROW-6508) - [C++] Add Tensor and SparseTensor factory function with validations
* [ARROW-6515](https://issues.apache.org/jira/browse/ARROW-6515) - [C++] Clean type\_traits.h definitions
* [ARROW-6578](https://issues.apache.org/jira/browse/ARROW-6578) - [C++] Casting int64 to string columns
* [ARROW-6592](https://issues.apache.org/jira/browse/ARROW-6592) - [Java] Add support for skipping decoding of columns/field in Avro converter
* [ARROW-6594](https://issues.apache.org/jira/browse/ARROW-6594) - [Java] Support logical type encodings from Avro
* [ARROW-6598](https://issues.apache.org/jira/browse/ARROW-6598) - [Java] Sort the code for ApproxEqualsVisitor
* [ARROW-6608](https://issues.apache.org/jira/browse/ARROW-6608) - [C++] Make default for ARROW\_HDFS to be OFF
* [ARROW-6610](https://issues.apache.org/jira/browse/ARROW-6610) - [C++] Add ARROW\_FILESYSTEM=ON/OFF CMake configuration flag
* [ARROW-6611](https://issues.apache.org/jira/browse/ARROW-6611) - [C++] Make ARROW\_JSON=OFF the default
* [ARROW-6612](https://issues.apache.org/jira/browse/ARROW-6612) - [C++] Add ARROW\_CSV CMake build flag
* [ARROW-6619](https://issues.apache.org/jira/browse/ARROW-6619) - [Ruby] Add support for building Gandiva::Expression by Arrow::Schema\#build\_expression
* [ARROW-6624](https://issues.apache.org/jira/browse/ARROW-6624) - [C++] Add SparseTensor.ToTensor() method
* [ARROW-6625](https://issues.apache.org/jira/browse/ARROW-6625) - [Python] Allow concat\_tables to null or default fill missing columns
* [ARROW-6631](https://issues.apache.org/jira/browse/ARROW-6631) - [C++] Do not build with any compression library dependencies by default
* [ARROW-6632](https://issues.apache.org/jira/browse/ARROW-6632) - [C++] Do not build with ARROW\_COMPUTE=on and ARROW\_DATASET=on by default
* [ARROW-6633](https://issues.apache.org/jira/browse/ARROW-6633) - [C++] Do not require double-conversion for default build
* [ARROW-6634](https://issues.apache.org/jira/browse/ARROW-6634) - [C++] Do not require flatbuffers or flatbuffers\_ep to build
* [ARROW-6634](https://issues.apache.org/jira/browse/ARROW-6634) - [C++] Do not require flatbuffers or flatbuffers\_ep to build
* [ARROW-6635](https://issues.apache.org/jira/browse/ARROW-6635) - [C++] Do not require glog for default build
* [ARROW-6636](https://issues.apache.org/jira/browse/ARROW-6636) - [C++] Do not build C++ command line utilities by default
* [ARROW-6637](https://issues.apache.org/jira/browse/ARROW-6637) - [C++] Zero-dependency default core build
* [ARROW-6637](https://issues.apache.org/jira/browse/ARROW-6637) - [C++] Zero-dependency default core build
* [ARROW-6646](https://issues.apache.org/jira/browse/ARROW-6646) - [Go] Amend NullType IPC implementation to append no buffers in RecordBatch message
* [ARROW-6650](https://issues.apache.org/jira/browse/ARROW-6650) - [Rust] [Integration] Create methods to test Arrow files against Integration JSON
* [ARROW-6656](https://issues.apache.org/jira/browse/ARROW-6656) - [Rust] [DataFusion] Implement MIN and MAX aggregate expressions
* [ARROW-6657](https://issues.apache.org/jira/browse/ARROW-6657) - [Rust] [DataFusion] Implement COUNT aggregate expression
* [ARROW-6658](https://issues.apache.org/jira/browse/ARROW-6658) - [Rust] [DataFusion] Implement AVG aggregate expression
* [ARROW-6659](https://issues.apache.org/jira/browse/ARROW-6659) - [Rust] [DataFusion] Refactor of HashAggregateExec to support custom merge
* [ARROW-6662](https://issues.apache.org/jira/browse/ARROW-6662) - [Java] Implement equals/approxEquals API for VectorSchemaRoot
* [ARROW-6671](https://issues.apache.org/jira/browse/ARROW-6671) - [C++] Sparse tensor naming
* [ARROW-6672](https://issues.apache.org/jira/browse/ARROW-6672) - [Java] Extract a common interface for dictionary builders
* [ARROW-6685](https://issues.apache.org/jira/browse/ARROW-6685) - [C++/Python] S3 FileStat object's base\_path and type depends on trailing slash
* [ARROW-6686](https://issues.apache.org/jira/browse/ARROW-6686) - [CI] Pull and push docker images to speed up the nightly builds
* [ARROW-6688](https://issues.apache.org/jira/browse/ARROW-6688) - [Packaging] Include s3 support in the conda packages
* [ARROW-6690](https://issues.apache.org/jira/browse/ARROW-6690) - [Rust] [DataFusion] HashAggregate without GROUP BY should use SIMD
* [ARROW-6692](https://issues.apache.org/jira/browse/ARROW-6692) - [Rust] [DataFusion] Update examples to use physical query plan
* [ARROW-6693](https://issues.apache.org/jira/browse/ARROW-6693) - [Rust] [DataFusion] Update unit tests to use physical query plan
* [ARROW-6694](https://issues.apache.org/jira/browse/ARROW-6694) - [Rust] [DataFusion] Update integration tests to use physical plan
* [ARROW-6695](https://issues.apache.org/jira/browse/ARROW-6695) - [Rust] [DataFusion] Remove execution of logical plan
* [ARROW-6696](https://issues.apache.org/jira/browse/ARROW-6696) - [Rust] [DataFusion] Implement simple math operations in physical query plan
* [ARROW-6700](https://issues.apache.org/jira/browse/ARROW-6700) - [Rust] [DataFusion] Use new parquet arrow reader
* [ARROW-6707](https://issues.apache.org/jira/browse/ARROW-6707) - [Java] Improve the performance of JDBC adapters by using nullable information
* [ARROW-6710](https://issues.apache.org/jira/browse/ARROW-6710) - [Java] Add JDBC adapter test to cover cases which contains some null values
* [ARROW-6711](https://issues.apache.org/jira/browse/ARROW-6711) - [C++] Consolidate Filter and Expression classes
* [ARROW-6721](https://issues.apache.org/jira/browse/ARROW-6721) - [JAVA] Avro adapter benchmark only runs once in JMH
* [ARROW-6722](https://issues.apache.org/jira/browse/ARROW-6722) - [Java] Provide a uniform way to get vector name
* [ARROW-6729](https://issues.apache.org/jira/browse/ARROW-6729) - [C++] StlStringBuffer constructor is not zero-copy
* [ARROW-6730](https://issues.apache.org/jira/browse/ARROW-6730) - [CI] Use GitHub Actions for "C++ with clang 7" docker image
* [ARROW-6731](https://issues.apache.org/jira/browse/ARROW-6731) - [CI] [Rust] Set up Github Action to run Rust tests
* [ARROW-6732](https://issues.apache.org/jira/browse/ARROW-6732) - [Java] Implement quick sort in a non-recursive way to avoid stack overflow
* [ARROW-6741](https://issues.apache.org/jira/browse/ARROW-6741) - [Release] Update changelog.py to use APACHE\_ prefixed JIRA\_USERNAME and JIRA\_PASSWORD environment variables
* [ARROW-6742](https://issues.apache.org/jira/browse/ARROW-6742) - [C++] Remove usage of boost::filesystem::path from arrow/io/hdfs\_internal.cc
* [ARROW-6743](https://issues.apache.org/jira/browse/ARROW-6743) - [C++] Completely remove usage of boost::filesystem (except in hdfs\_internal)
* [ARROW-6744](https://issues.apache.org/jira/browse/ARROW-6744) - [Rust] Export JsonEqual trait in the array module
* [ARROW-6754](https://issues.apache.org/jira/browse/ARROW-6754) - [C++] Merge arrow/allocator.h and arrow/stl.h, or rename allocator.h
* [ARROW-6758](https://issues.apache.org/jira/browse/ARROW-6758) - [Release] Install ephemeral node/npm/npx in release verification script
* [ARROW-6764](https://issues.apache.org/jira/browse/ARROW-6764) - [C++] Add readahead iterator
* [ARROW-6767](https://issues.apache.org/jira/browse/ARROW-6767) - [JS] lazily bind batches in scan/scanReverse
* [ARROW-6768](https://issues.apache.org/jira/browse/ARROW-6768) - [C++][Dataset] Implement dataset::Scan to Table helper function
* [ARROW-6769](https://issues.apache.org/jira/browse/ARROW-6769) - [C++][Dataset] End to End dataset integration test case
* [ARROW-6770](https://issues.apache.org/jira/browse/ARROW-6770) - [CI][Travis] Download Minio quietly
* [ARROW-6777](https://issues.apache.org/jira/browse/ARROW-6777) - [GLib][CI] Unpin gobject-introspection gem
* [ARROW-6778](https://issues.apache.org/jira/browse/ARROW-6778) - [C++] Support DurationType in Cast kernel
* [ARROW-6782](https://issues.apache.org/jira/browse/ARROW-6782) - [C++] Build minimal core Arrow libraries without any Boost headers
* [ARROW-6784](https://issues.apache.org/jira/browse/ARROW-6784) - [C++][R] Move filter and take code from Rcpp to C++ library
* [ARROW-6787](https://issues.apache.org/jira/browse/ARROW-6787) - [CI] Decommission "C++ with clang 7 and system packages" Travis CI job
* [ARROW-6788](https://issues.apache.org/jira/browse/ARROW-6788) - [CI] Migrate Travis CI lint job to GitHub Actions
* [ARROW-6789](https://issues.apache.org/jira/browse/ARROW-6789) - [Python] Automatically box bytes/buffer-like values yielded from \`FlightServerBase.do\_action\` in Result values
* [ARROW-6790](https://issues.apache.org/jira/browse/ARROW-6790) - [Release] Automatically disable integration test cases in release verification
* [ARROW-6793](https://issues.apache.org/jira/browse/ARROW-6793) - [R] Arrow C++ binary packaging for Linux
* [ARROW-6797](https://issues.apache.org/jira/browse/ARROW-6797) - [Release] Use a separately cloned arrow-site repository in the website post release script
* [ARROW-6802](https://issues.apache.org/jira/browse/ARROW-6802) - [Packaging][deb][RPM] Update qemu-user-static package URL
* [ARROW-6803](https://issues.apache.org/jira/browse/ARROW-6803) - [Rust] [DataFusion] Aggregate queries are slower with new physical query plan
* [ARROW-6804](https://issues.apache.org/jira/browse/ARROW-6804) - [CI] [Rust] Migrate Travis Rust job to Github Actions
* [ARROW-6807](https://issues.apache.org/jira/browse/ARROW-6807) - [Java][FlightRPC] Expose gRPC service
* [ARROW-6810](https://issues.apache.org/jira/browse/ARROW-6810) - [Website] Add docs for R package 0.15 release
* [ARROW-6811](https://issues.apache.org/jira/browse/ARROW-6811) - [R] Assorted post-0.15 release cleanups
* [ARROW-6814](https://issues.apache.org/jira/browse/ARROW-6814) - [C++] Resolve compiler warnings occurred on release build
* [ARROW-6822](https://issues.apache.org/jira/browse/ARROW-6822) - [Website] merge\_pr.py is published
* [ARROW-6824](https://issues.apache.org/jira/browse/ARROW-6824) - [Plasma] Support batched create and seal requests for small objects
* [ARROW-6825](https://issues.apache.org/jira/browse/ARROW-6825) - [C++] Rework CSV reader IO around readahead iterator
* [ARROW-6831](https://issues.apache.org/jira/browse/ARROW-6831) - [R] Update R macOS/Windows builds for change in cmake compression defaults
* [ARROW-6832](https://issues.apache.org/jira/browse/ARROW-6832) - [R] Implement Codec::IsAvailable
* [ARROW-6833](https://issues.apache.org/jira/browse/ARROW-6833) - [R][CI] Add crossbow job for full R autobrew macOS build
* [ARROW-6836](https://issues.apache.org/jira/browse/ARROW-6836) - [Format] add a custom\_metadata:[KeyValue] field to the Footer table in File.fbs
* [ARROW-6843](https://issues.apache.org/jira/browse/ARROW-6843) - [Website] Disable deploy on pull request
* [ARROW-6847](https://issues.apache.org/jira/browse/ARROW-6847) - [C++] Add a range\_expression interface to Iterator<\>
* [ARROW-6850](https://issues.apache.org/jira/browse/ARROW-6850) - [Java] Jdbc converter support Null type
* [ARROW-6852](https://issues.apache.org/jira/browse/ARROW-6852) - [C++] memory-benchmark build failed on Arm64
* [ARROW-6853](https://issues.apache.org/jira/browse/ARROW-6853) - [Java] Support vector and dictionary encoder use different hasher for calculating hashCode
* [ARROW-6855](https://issues.apache.org/jira/browse/ARROW-6855) - [C++][Python][Flight] Implement Flight middleware
* [ARROW-6862](https://issues.apache.org/jira/browse/ARROW-6862) - [Developer] Check pull request title
* [ARROW-6863](https://issues.apache.org/jira/browse/ARROW-6863) - [Java] Provide parallel searcher
* [ARROW-6865](https://issues.apache.org/jira/browse/ARROW-6865) - [Java] Improve the performance of comparing an ArrowBuf against a byte array
* [ARROW-6866](https://issues.apache.org/jira/browse/ARROW-6866) - [Java] Improve the performance of calculating hash code for struct vector
* [ARROW-6879](https://issues.apache.org/jira/browse/ARROW-6879) - [Rust] Add explicit SIMD for sum kernel
* [ARROW-6880](https://issues.apache.org/jira/browse/ARROW-6880) - [Rust] Add explicit SIMD for min/max kernel
* [ARROW-6881](https://issues.apache.org/jira/browse/ARROW-6881) - [Rust] Remove "array\_ops" in favor of the "compute" sub-module
* [ARROW-6884](https://issues.apache.org/jira/browse/ARROW-6884) - [Python][Flight] Make server-side RPC exceptions more friendly?
* [ARROW-6887](https://issues.apache.org/jira/browse/ARROW-6887) - [Java] Create prose documentation for using ValueVectors
* [ARROW-6888](https://issues.apache.org/jira/browse/ARROW-6888) - [Java] Support copy operation for vector value comparators
* [ARROW-6889](https://issues.apache.org/jira/browse/ARROW-6889) - [Java] ComplexCopier enable FixedSizeList type & fix RangeEualsVisitor StackOverFlow
* [ARROW-6891](https://issues.apache.org/jira/browse/ARROW-6891) - [Rust] [Parquet] Add Utf8 support to ArrowReader
* [ARROW-6902](https://issues.apache.org/jira/browse/ARROW-6902) - [C++] Add String\*/Binary\* support for Compare kernels
* [ARROW-6904](https://issues.apache.org/jira/browse/ARROW-6904) - [Python] Implement MapArray and MapType
* [ARROW-6907](https://issues.apache.org/jira/browse/ARROW-6907) - [C++][Plasma] Allow Plasma store to batch notifications to clients
* [ARROW-6911](https://issues.apache.org/jira/browse/ARROW-6911) - [Java] Provide composite comparator
* [ARROW-6912](https://issues.apache.org/jira/browse/ARROW-6912) - [Java] Extract a common base class for avro converter consumers
* [ARROW-6916](https://issues.apache.org/jira/browse/ARROW-6916) - [Developer] Alphabetize task names in nightly Crossbow report
* [ARROW-6918](https://issues.apache.org/jira/browse/ARROW-6918) - [R] Make docker-compose setup faster
* [ARROW-6919](https://issues.apache.org/jira/browse/ARROW-6919) - [Python] Expose more builders in Cython
* [ARROW-6920](https://issues.apache.org/jira/browse/ARROW-6920) - [Python] create manylinux wheels for python3.8
* [ARROW-6926](https://issues.apache.org/jira/browse/ARROW-6926) - [Python] Support \_\_sizeof\_\_ protocol for Python objects
* [ARROW-6927](https://issues.apache.org/jira/browse/ARROW-6927) - [C++] Add gRPC version check
* [ARROW-6928](https://issues.apache.org/jira/browse/ARROW-6928) - [Rust] Add FixedSizeList type
* [ARROW-6930](https://issues.apache.org/jira/browse/ARROW-6930) - [Java] Create utility class for populating vector values used for test purpose only
* [ARROW-6932](https://issues.apache.org/jira/browse/ARROW-6932) - [Java] incorrect log on known extension type
* [ARROW-6933](https://issues.apache.org/jira/browse/ARROW-6933) - [Java] Suppor linear dictionary encoder
* [ARROW-6936](https://issues.apache.org/jira/browse/ARROW-6936) - [Python] Improve error message when object of wrong type is given
* [ARROW-6942](https://issues.apache.org/jira/browse/ARROW-6942) - [Developer] Add support for Parquet in pull request check by GitHub Actions
* [ARROW-6943](https://issues.apache.org/jira/browse/ARROW-6943) - [Website] Translate Apache Arrow Flight introduction to Japanese
* [ARROW-6944](https://issues.apache.org/jira/browse/ARROW-6944) - [Rust] Add StringType
* [ARROW-6949](https://issues.apache.org/jira/browse/ARROW-6949) - [Java] Fix promotable write to handle nullvectors
* [ARROW-6951](https://issues.apache.org/jira/browse/ARROW-6951) - [C++][Dataset] Ensure column projection is passed to ParquetDataFragment
* [ARROW-6952](https://issues.apache.org/jira/browse/ARROW-6952) - [C++][Dataset] Ensure expression filter is passed ParquetDataFragment
* [ARROW-6954](https://issues.apache.org/jira/browse/ARROW-6954) - [Python] [CI] Add Python 3.8 to CI matrix
* [ARROW-6960](https://issues.apache.org/jira/browse/ARROW-6960) - [R] Add support for more compression codecs in Windows build
* [ARROW-6961](https://issues.apache.org/jira/browse/ARROW-6961) - [C++][Gandiva] Add lower\_utf8 function in Gandiva
* [ARROW-6963](https://issues.apache.org/jira/browse/ARROW-6963) - [Packaging][Wheel][OSX] Use crossbow's command to deploy artifacts from travis builds
* [ARROW-6964](https://issues.apache.org/jira/browse/ARROW-6964) - [C++][Dataset] Expose a nested parallel option for Scanner::ToTable
* [ARROW-6965](https://issues.apache.org/jira/browse/ARROW-6965) - [C++][Dataset] Optionally expose partition keys as materialized columns
* [ARROW-6967](https://issues.apache.org/jira/browse/ARROW-6967) - [C++] Add filter expressions for IN, IS\_VALID
* [ARROW-6969](https://issues.apache.org/jira/browse/ARROW-6969) - [C++][Dataset] ParquetScanTask eagerly load file
* [ARROW-6970](https://issues.apache.org/jira/browse/ARROW-6970) - [Packaging][RPM] Add support for CentOS 8
* [ARROW-6973](https://issues.apache.org/jira/browse/ARROW-6973) - [C++][ThreadPool] Use perfect forwarding in Submit
* [ARROW-6975](https://issues.apache.org/jira/browse/ARROW-6975) - [C++] Put make\_unique in its own header
* [ARROW-6980](https://issues.apache.org/jira/browse/ARROW-6980) - [R] dplyr backend for RecordBatch/Table
* [ARROW-6984](https://issues.apache.org/jira/browse/ARROW-6984) - [C++] Update LZ4 to 1.9.2 for CVE-2019-17543
* [ARROW-6986](https://issues.apache.org/jira/browse/ARROW-6986) - [R] Add basic Expression class
* [ARROW-6987](https://issues.apache.org/jira/browse/ARROW-6987) - [CI] Travis OSX failing to install sdk headers
* [ARROW-6991](https://issues.apache.org/jira/browse/ARROW-6991) - [Packaging][deb] Add support for Ubuntu 19.10
* [ARROW-6994](https://issues.apache.org/jira/browse/ARROW-6994) - [C++] Research jemalloc memory page reclamation configuration on macOS when background\_thread option is unavailable
* [ARROW-6997](https://issues.apache.org/jira/browse/ARROW-6997) - [Packaging] Add support for RHEL
* [ARROW-7000](https://issues.apache.org/jira/browse/ARROW-7000) - [C++][Gandiva] Handle empty inputs in string lower, upper functions
* [ARROW-7003](https://issues.apache.org/jira/browse/ARROW-7003) - [Format] [Rust] Generate flatbuffers files in build script
* [ARROW-7004](https://issues.apache.org/jira/browse/ARROW-7004) - [Plasma] Make it possible to bump up object in LRU cache
* [ARROW-7006](https://issues.apache.org/jira/browse/ARROW-7006) - [Rust] Bump flatbuffers version to avoid vulnerability
* [ARROW-7007](https://issues.apache.org/jira/browse/ARROW-7007) - [C++] Enable mmap option for LocalFs
* [ARROW-7014](https://issues.apache.org/jira/browse/ARROW-7014) - [Developer] Write script to verify Linux wheels given local environment with conda or virtualenv
* [ARROW-7015](https://issues.apache.org/jira/browse/ARROW-7015) - [Developer] Write script to verify macOS wheels given local environment with conda or virtualenv
* [ARROW-7016](https://issues.apache.org/jira/browse/ARROW-7016) - [Developer][Python] Write script to verify Windows wheels given local environment with conda
* [ARROW-7019](https://issues.apache.org/jira/browse/ARROW-7019) - [Java] Improve the performance of loading validity buffers
* [ARROW-7026](https://issues.apache.org/jira/browse/ARROW-7026) - [Java] Remove assertions in MessageSerializer/vector/writer/reader
* [ARROW-7031](https://issues.apache.org/jira/browse/ARROW-7031) - [Python] Expose the offsets of a ListArray in python
* [ARROW-7031](https://issues.apache.org/jira/browse/ARROW-7031) - [Python] Expose the offsets of a ListArray in python
* [ARROW-7032](https://issues.apache.org/jira/browse/ARROW-7032) - [Release] Run the python unit tests in the release verification script
* [ARROW-7034](https://issues.apache.org/jira/browse/ARROW-7034) - [CI][Crossbow] Skip known nightly failures
* [ARROW-7035](https://issues.apache.org/jira/browse/ARROW-7035) - [R] Default arguments are unclear in write\_parquet docs
* [ARROW-7036](https://issues.apache.org/jira/browse/ARROW-7036) - [C++] Version up ORC to avoid compile errors
* [ARROW-7037](https://issues.apache.org/jira/browse/ARROW-7037) - [C++ ] Compile error on the combination of protobuf \>= 3.9 and clang
* [ARROW-7039](https://issues.apache.org/jira/browse/ARROW-7039) - [Python] Typecheck expects pandas to be installed
* [ARROW-7047](https://issues.apache.org/jira/browse/ARROW-7047) - [C++][Dataset] Filter expressions should not require exact type match
* [ARROW-7052](https://issues.apache.org/jira/browse/ARROW-7052) - [C++] Datasets example fails to build with ARROW\_SHARED=OFF
* [ARROW-7054](https://issues.apache.org/jira/browse/ARROW-7054) - [Docs] Add option to override displayed docs version with an environment variable
* [ARROW-7057](https://issues.apache.org/jira/browse/ARROW-7057) - [C++] Add API to parse URI query strings
* [ARROW-7058](https://issues.apache.org/jira/browse/ARROW-7058) - [C++] FileSystemDataSourceDiscovery should apply partition schemes relative to the base\_dir of its selector
* [ARROW-7060](https://issues.apache.org/jira/browse/ARROW-7060) - [R] Post-0.15.1 cleanup
* [ARROW-7061](https://issues.apache.org/jira/browse/ARROW-7061) - [C++][Dataset] FileSystemDiscovery with ParquetFileFormat should ignore files that aren't Parquet
* [ARROW-7062](https://issues.apache.org/jira/browse/ARROW-7062) - [C++] Parquet file parse error messages should include the file name
* [ARROW-7064](https://issues.apache.org/jira/browse/ARROW-7064) - [R] Implement null type
* [ARROW-7066](https://issues.apache.org/jira/browse/ARROW-7066) - [Python] support returning ChunkedArray from \_\_arrow\_array\_\_ ?
* [ARROW-7067](https://issues.apache.org/jira/browse/ARROW-7067) - [CI] Disable code coverage on Travis-CI
* [ARROW-7069](https://issues.apache.org/jira/browse/ARROW-7069) - [C++][Dataset] Replace ConstantPartitionScheme with PrefixDictionaryPartitionScheme
* [ARROW-7070](https://issues.apache.org/jira/browse/ARROW-7070) - [Packaging][deb] Update package names for 1.0.0
* [ARROW-7072](https://issues.apache.org/jira/browse/ARROW-7072) - [Java] Support concating validity bits efficiently
* [ARROW-7082](https://issues.apache.org/jira/browse/ARROW-7082) - [Packaging][deb] Add apache-arrow-archive-keyring
* [ARROW-7086](https://issues.apache.org/jira/browse/ARROW-7086) - [C++] Provide a wrapper for invoking factories to produce a Result
* [ARROW-7092](https://issues.apache.org/jira/browse/ARROW-7092) - [R] Add vignette for dplyr and datasets
* [ARROW-7093](https://issues.apache.org/jira/browse/ARROW-7093) - [R] Support creating ScalarExpressions for more data types
* [ARROW-7094](https://issues.apache.org/jira/browse/ARROW-7094) - [C++] FileSystemDataSource should use an owning pointer for fs::Filesystem
* [ARROW-7095](https://issues.apache.org/jira/browse/ARROW-7095) - [R] Better handling of unsupported filter and mutate expressions in dplyr methods
* [ARROW-7096](https://issues.apache.org/jira/browse/ARROW-7096) - [C++] Add options structs for concatenation-with-promotion and schema unification
* [ARROW-7098](https://issues.apache.org/jira/browse/ARROW-7098) - [Java] Improve the performance of comparing two memory blocks
* [ARROW-7099](https://issues.apache.org/jira/browse/ARROW-7099) - [C++] Disambiguate function calls in csv parser test
* [ARROW-7101](https://issues.apache.org/jira/browse/ARROW-7101) - [CI] Refactor docker-compose setup and use it with GitHub Actions
* [ARROW-7103](https://issues.apache.org/jira/browse/ARROW-7103) - [R] Various minor cleanups
* [ARROW-7107](https://issues.apache.org/jira/browse/ARROW-7107) - [C++][MinGW] Enable Flight on AppVeyor
* [ARROW-7110](https://issues.apache.org/jira/browse/ARROW-7110) - [GLib] Add filter support for GArrowTable, GArrowChunkedArray, and GArrowRecordBatch
* [ARROW-7111](https://issues.apache.org/jira/browse/ARROW-7111) - [GLib] Add take support for GArrowTable, GArrowChunkedArray, and GArrowRecordBatch
* [ARROW-7113](https://issues.apache.org/jira/browse/ARROW-7113) - [Rust] Buffer should accept memory owned by others
* [ARROW-7116](https://issues.apache.org/jira/browse/ARROW-7116) - [CI] Use the docker repository provided by apache organisation
* [ARROW-7120](https://issues.apache.org/jira/browse/ARROW-7120) - [C++][CI] Add .ccache to the docker-compose volume mounts
* [ARROW-7146](https://issues.apache.org/jira/browse/ARROW-7146) - [R][CI] Various fixes and speedups for the R docker-compose setup
* [ARROW-7147](https://issues.apache.org/jira/browse/ARROW-7147) - [C++][Dataset] Refactor dataset's API to use Result<T\>
* [ARROW-7148](https://issues.apache.org/jira/browse/ARROW-7148) - [C++][Dataset] API cleanup
* [ARROW-7149](https://issues.apache.org/jira/browse/ARROW-7149) - [C++] Remove experimental status on filesystem APIs
* [ARROW-7155](https://issues.apache.org/jira/browse/ARROW-7155) - [Java][CI] add maven wrapper to make setup process simple
* [ARROW-7159](https://issues.apache.org/jira/browse/ARROW-7159) - [CI] Run HDFS tests as cron task
* [ARROW-7160](https://issues.apache.org/jira/browse/ARROW-7160) - [C++] Update string\_view backport
* [ARROW-7161](https://issues.apache.org/jira/browse/ARROW-7161) - [C++] Migrate filesystem layer from Status to Result
* [ARROW-7162](https://issues.apache.org/jira/browse/ARROW-7162) - [C++] Cleanup warnings in cmake\_modules/SetupCxxFlags.cmake
* [ARROW-7166](https://issues.apache.org/jira/browse/ARROW-7166) - [Java] Remove redundant code for Jdbc adapters
* [ARROW-7169](https://issues.apache.org/jira/browse/ARROW-7169) - [C++] Vendor uriparser library
* [ARROW-7171](https://issues.apache.org/jira/browse/ARROW-7171) - [Ruby] Pass Array<Boolean\> for Arrow::Table\#filter
* [ARROW-7172](https://issues.apache.org/jira/browse/ARROW-7172) - [C++][Dataset] Improve format of Expression::ToString
* [ARROW-7176](https://issues.apache.org/jira/browse/ARROW-7176) - [C++] Fix arrow::ipc compiler warning
* [ARROW-7178](https://issues.apache.org/jira/browse/ARROW-7178) - [C++] Vendor forward compatible std::optional
* [ARROW-7185](https://issues.apache.org/jira/browse/ARROW-7185) - [R][Dataset] Add bindings for IN, IS\_VALID expressions
* [ARROW-7186](https://issues.apache.org/jira/browse/ARROW-7186) - [R] Add inline comments to document the dplyr code
* [ARROW-7192](https://issues.apache.org/jira/browse/ARROW-7192) - [Rust] Implement Flight crate
* [ARROW-7193](https://issues.apache.org/jira/browse/ARROW-7193) - [Rust] Create Arrow stream reader
* [ARROW-7195](https://issues.apache.org/jira/browse/ARROW-7195) - [Ruby] Improve \#filter, \#take, and \#is\_in
* [ARROW-7196](https://issues.apache.org/jira/browse/ARROW-7196) - [Ruby] Remove needless BinaryArrayBuilder\#append\_values
* [ARROW-7197](https://issues.apache.org/jira/browse/ARROW-7197) - [Ruby] Suppress keyword argument related warnings with Ruby 2.7
* [ARROW-7204](https://issues.apache.org/jira/browse/ARROW-7204) - [C++][Dataset] In expression should not require exact type match
* [ARROW-7206](https://issues.apache.org/jira/browse/ARROW-7206) - [Java] Avoid string concatenation when calling Preconditions\#checkArgument
* [ARROW-7207](https://issues.apache.org/jira/browse/ARROW-7207) - [Rust] Update Generated Flatbuffer Files
* [ARROW-7210](https://issues.apache.org/jira/browse/ARROW-7210) - [C++] Scalar cast should support time-based types
* [ARROW-7211](https://issues.apache.org/jira/browse/ARROW-7211) - [Rust] [Parquet] Support writing to byte buffers
* [ARROW-7216](https://issues.apache.org/jira/browse/ARROW-7216) - [Java] Improve the performance of setting/clearing individual bits
* [ARROW-7219](https://issues.apache.org/jira/browse/ARROW-7219) - [CI][Python] Install pickle5 in the conda-python docker image for python version 3.6
* [ARROW-7227](https://issues.apache.org/jira/browse/ARROW-7227) - [Python] Provide wrappers for ConcatenateWithPromotion()
* [ARROW-7228](https://issues.apache.org/jira/browse/ARROW-7228) - [Python] Expose RecordBatch.FromStructArray in Python.
* [ARROW-7235](https://issues.apache.org/jira/browse/ARROW-7235) - [C++] Add Result<T\> to APIs to arrow/io
* [ARROW-7236](https://issues.apache.org/jira/browse/ARROW-7236) - [C++] Add Result<T\> to APIs to arrow/csv
* [ARROW-7240](https://issues.apache.org/jira/browse/ARROW-7240) - [C++] Add Result<T\> to APIs to arrow/util
* [ARROW-7246](https://issues.apache.org/jira/browse/ARROW-7246) - [CI][Python] wheel can't be built by SSL\_ST\_INIT error
* [ARROW-7247](https://issues.apache.org/jira/browse/ARROW-7247) - [CI][Python] wheel can't be built by wget and OpenSSL error
* [ARROW-7248](https://issues.apache.org/jira/browse/ARROW-7248) - [Rust] Automatically Regenerate IPC messages from Flatbuffers
* [ARROW-7255](https://issues.apache.org/jira/browse/ARROW-7255) - [CI] Run source release test on pull request
* [ARROW-7257](https://issues.apache.org/jira/browse/ARROW-7257) - [CI] Homebrew formula is failed by openssl formula name update
* [ARROW-7258](https://issues.apache.org/jira/browse/ARROW-7258) - [CI] Fuzzit job is failed by nonexistent directory
* [ARROW-7259](https://issues.apache.org/jira/browse/ARROW-7259) - [Java] Support subfield encoder use different hasher
* [ARROW-7260](https://issues.apache.org/jira/browse/ARROW-7260) - [CI] Ubuntu 14.04 test is failed by user defined literal
* [ARROW-7261](https://issues.apache.org/jira/browse/ARROW-7261) - [Python] Python support for fixed size list type
* [ARROW-7262](https://issues.apache.org/jira/browse/ARROW-7262) - [C++][Gandiva] Implement replace function in Gandiva
* [ARROW-7263](https://issues.apache.org/jira/browse/ARROW-7263) - [C++][Gandiva] Implement locate and position functions
* [ARROW-7268](https://issues.apache.org/jira/browse/ARROW-7268) - [Rust] Propagate \`custom\_metadata\` field from IPC message
* [ARROW-7269](https://issues.apache.org/jira/browse/ARROW-7269) - [C++] Fix arrow::parquet compiler warning
* [ARROW-7270](https://issues.apache.org/jira/browse/ARROW-7270) - [Go] preserve CSV reading behaviour, improve memory usage
* [ARROW-7274](https://issues.apache.org/jira/browse/ARROW-7274) - [C++] Add Result<T\> APIs to Decimal class
* [ARROW-7275](https://issues.apache.org/jira/browse/ARROW-7275) - [Ruby] Add support for Arrow::ListDataType.new(data\_type)
* [ARROW-7276](https://issues.apache.org/jira/browse/ARROW-7276) - [Ruby] Add support for building Arrow::ListArray from [[...]]
* [ARROW-7277](https://issues.apache.org/jira/browse/ARROW-7277) - [Document] Add discussion about vector lifecycle
* [ARROW-7279](https://issues.apache.org/jira/browse/ARROW-7279) - [C++] Rename UnionArray::type\_ids to UnionArray::type\_codes
* [ARROW-7284](https://issues.apache.org/jira/browse/ARROW-7284) - [Java] ensure java implementation meets clarified dictionary spec
* [ARROW-7289](https://issues.apache.org/jira/browse/ARROW-7289) - [C\#] ListType constructor argument is redundant
* [ARROW-7290](https://issues.apache.org/jira/browse/ARROW-7290) - [C\#] Implement ListArray Builder
* [ARROW-7292](https://issues.apache.org/jira/browse/ARROW-7292) - [C++] [CI] [Dev] Add ASAN / UBSAN CI run
* [ARROW-7293](https://issues.apache.org/jira/browse/ARROW-7293) - [Dev] [C++] Persist ccache in docker-compose build volumes
* [ARROW-7296](https://issues.apache.org/jira/browse/ARROW-7296) - [Python] Add ORC api documentation
* [ARROW-7299](https://issues.apache.org/jira/browse/ARROW-7299) - [GLib] Use Result instead of Status
* [ARROW-7303](https://issues.apache.org/jira/browse/ARROW-7303) - [C++] Refactor benchmarks to use new Result APIs
* [ARROW-7306](https://issues.apache.org/jira/browse/ARROW-7306) - [C++] Add Result-returning version of FileSystemFromUri
* [ARROW-7307](https://issues.apache.org/jira/browse/ARROW-7307) - [CI][GLib] Documentation isn't generated
* [ARROW-7309](https://issues.apache.org/jira/browse/ARROW-7309) - [Python] Support HDFS federation viewfs://
* [ARROW-7310](https://issues.apache.org/jira/browse/ARROW-7310) - [Python] Expose HDFS implementation for pyarrow.fs
* [ARROW-7311](https://issues.apache.org/jira/browse/ARROW-7311) - [Python] Return filesystem and path from URI
* [ARROW-7312](https://issues.apache.org/jira/browse/ARROW-7312) - [Rust] ArrowError should implement std::error:Error
* [ARROW-7317](https://issues.apache.org/jira/browse/ARROW-7317) - [C++] Migrate Iterator API to Result<T\>
* [ARROW-7319](https://issues.apache.org/jira/browse/ARROW-7319) - [C++] Refactor Iterator<T\> to yield Result<T\>
* [ARROW-7321](https://issues.apache.org/jira/browse/ARROW-7321) - [CI][GLib] Failed to build with GLib warning
* [ARROW-7322](https://issues.apache.org/jira/browse/ARROW-7322) - [CI][Python] Fall back to arrowdev dockerhub organization for manylinux images
* [ARROW-7323](https://issues.apache.org/jira/browse/ARROW-7323) - [CI][Rust] Nightly CI is failed by different toolchain
* [ARROW-7324](https://issues.apache.org/jira/browse/ARROW-7324) - [Rust] Add Timezone to Timestamp
* [ARROW-7325](https://issues.apache.org/jira/browse/ARROW-7325) - [Rust] [Parquet] Update to parquet-format 2.6 and thrift 0.12
* [ARROW-7329](https://issues.apache.org/jira/browse/ARROW-7329) - [Java] AllocationManager: Allow managing different types of memory other than those are allocated using Netty
* [ARROW-7333](https://issues.apache.org/jira/browse/ARROW-7333) - [CI][Rust] Remove duplicated nightly job
* [ARROW-7334](https://issues.apache.org/jira/browse/ARROW-7334) - [CI][Python] macOS uses Python 2
* [ARROW-7339](https://issues.apache.org/jira/browse/ARROW-7339) - [CMake] Thrift version not respected in CMake configuration version.txt
* [ARROW-7340](https://issues.apache.org/jira/browse/ARROW-7340) - [CI] Prune defunct appveyor build setup
* [ARROW-7344](https://issues.apache.org/jira/browse/ARROW-7344) - [Packaging][Python] Build manylinux2014 wheels
* [ARROW-7346](https://issues.apache.org/jira/browse/ARROW-7346) - [CI] Explicit usage of ccache across the builds
* [ARROW-7347](https://issues.apache.org/jira/browse/ARROW-7347) - [C++] Update bundled Boost to 1.71.0
* [ARROW-7348](https://issues.apache.org/jira/browse/ARROW-7348) - [Rust] Add api to return references of buffer of null bitmap.
* [ARROW-7351](https://issues.apache.org/jira/browse/ARROW-7351) - [Developer] Only suggest cpp-\* fix versions when merging Parquet patches
* [ARROW-7357](https://issues.apache.org/jira/browse/ARROW-7357) - [Go] migrate from pkg/errors to x/xerrors
* [ARROW-7366](https://issues.apache.org/jira/browse/ARROW-7366) - [C++][Dataset] Use PartitionSchemeDiscovery in DataSourceDiscovery
* [ARROW-7367](https://issues.apache.org/jira/browse/ARROW-7367) - [Python] Use np.full instead of np.array.repeat in ParquetDatasetPiece
* [ARROW-7368](https://issues.apache.org/jira/browse/ARROW-7368) - [Ruby] Use :arrow\_file and :arrow\_streaming for format name
* [ARROW-7369](https://issues.apache.org/jira/browse/ARROW-7369) - [GLib] Add garrow\_table\_combine\_chunks
* [ARROW-7370](https://issues.apache.org/jira/browse/ARROW-7370) - [C++] Old Protobuf with AUTO detection is failed
* [ARROW-7377](https://issues.apache.org/jira/browse/ARROW-7377) - [C++][Dataset] Simplify parquet column projection
* [ARROW-7378](https://issues.apache.org/jira/browse/ARROW-7378) - [C++][Gandiva] Loop vectorization broken in IR optimization
* [ARROW-7379](https://issues.apache.org/jira/browse/ARROW-7379) - [C++] Introduce SchemaBuilder companion class and Field::IsCompatibleWith
* [ARROW-7380](https://issues.apache.org/jira/browse/ARROW-7380) - [C++][Dataset] Implement DatasetFactory
* [ARROW-7382](https://issues.apache.org/jira/browse/ARROW-7382) - [C++][Dataset] Refactor FsDsDiscovery constructors
* [ARROW-7387](https://issues.apache.org/jira/browse/ARROW-7387) - [C\#] Support ListType Serialization
* [ARROW-7392](https://issues.apache.org/jira/browse/ARROW-7392) - [Packaging] Add conda packaging tasks for python 3.8
* [ARROW-7398](https://issues.apache.org/jira/browse/ARROW-7398) - [Packaging][Python] Conda builds are failing on macOS
* [ARROW-7399](https://issues.apache.org/jira/browse/ARROW-7399) - [C++][Gandiva] Gandiva does not pick runtime cpu features
* [ARROW-7402](https://issues.apache.org/jira/browse/ARROW-7402) - [C++] Add more information on CUDA error
* [ARROW-7403](https://issues.apache.org/jira/browse/ARROW-7403) - [C++][JSON] Enable Rapidjson on Arm64 Neon
* [ARROW-7410](https://issues.apache.org/jira/browse/ARROW-7410) - [Python] [Doc] Document filesystem APIs
* [ARROW-7411](https://issues.apache.org/jira/browse/ARROW-7411) - [C++][Flight] Incorrect Arrow Flight benchmark output
* [ARROW-7413](https://issues.apache.org/jira/browse/ARROW-7413) - [Python][Dataset] Add tests for PartitionSchemeDiscovery
* [ARROW-7414](https://issues.apache.org/jira/browse/ARROW-7414) - [R][Dataset] Implement PartitionSchemeDiscovery
* [ARROW-7415](https://issues.apache.org/jira/browse/ARROW-7415) - [C++][Dataset] Implement IpcFormat for sources composed of ipc files
* [ARROW-7416](https://issues.apache.org/jira/browse/ARROW-7416) - [R][Nightly] Fix macos-r-autobrew build on R 3.6.2
* [ARROW-7417](https://issues.apache.org/jira/browse/ARROW-7417) - [C++] Add a docker-compose entry for CUDA 10.1
* [ARROW-7418](https://issues.apache.org/jira/browse/ARROW-7418) - [C++] Can't build with g++ 5.4.0 on Ubuntu 16.04
* [ARROW-7420](https://issues.apache.org/jira/browse/ARROW-7420) - [C++] Migrate tensor related APIs to Result-returning version
* [ARROW-7429](https://issues.apache.org/jira/browse/ARROW-7429) - [Java] Enhance code style checking for Java code (remove consecutive spaces)
* [ARROW-7430](https://issues.apache.org/jira/browse/ARROW-7430) - [Python] Add more docstrings to dataset bindings
* [ARROW-7431](https://issues.apache.org/jira/browse/ARROW-7431) - [Python] Add dataset API to reference docs
* [ARROW-7432](https://issues.apache.org/jira/browse/ARROW-7432) - [Python] Add higher-level datasets functions
* [ARROW-7439](https://issues.apache.org/jira/browse/ARROW-7439) - [C++][Dataset] Remove dataset pointer aliases
* [ARROW-7449](https://issues.apache.org/jira/browse/ARROW-7449) - [GLib] Make GObject Introspection optional
* [ARROW-7452](https://issues.apache.org/jira/browse/ARROW-7452) - [GLib] Make GArrowTimeDataType abstract
* [ARROW-7453](https://issues.apache.org/jira/browse/ARROW-7453) - [Ruby] Add support for Arrow::NullArray\#[]
* [ARROW-7454](https://issues.apache.org/jira/browse/ARROW-7454) - [Ruby] Add support for saving/loading TSV
* [ARROW-7455](https://issues.apache.org/jira/browse/ARROW-7455) - [Ruby] Use Arrow::DataType.resolve for all GArrowDataType input
* [ARROW-7456](https://issues.apache.org/jira/browse/ARROW-7456) - [C++] Add support for YYYY-MM-DDThh and YYYY-MM-DDThh:mm timestamp formats
* [ARROW-7457](https://issues.apache.org/jira/browse/ARROW-7457) - [Doc] Fix typos
* [ARROW-7459](https://issues.apache.org/jira/browse/ARROW-7459) - [Python] Documentation lint is failed
* [ARROW-7460](https://issues.apache.org/jira/browse/ARROW-7460) - [Rust] Improve some kernels with autovectorisation
* [ARROW-7461](https://issues.apache.org/jira/browse/ARROW-7461) - [Java] Fix typos and spelling
* [ARROW-7463](https://issues.apache.org/jira/browse/ARROW-7463) - [Doc] Fix a broken link and typos
* [ARROW-7464](https://issues.apache.org/jira/browse/ARROW-7464) - [C++] Refine CpuInfo singleton with std::call\_once
* [ARROW-7465](https://issues.apache.org/jira/browse/ARROW-7465) - [C++] Add Arrow memory benchmark for Arm64
* [ARROW-7468](https://issues.apache.org/jira/browse/ARROW-7468) - [Python] Fix typos
* [ARROW-7469](https://issues.apache.org/jira/browse/ARROW-7469) - [C++] Improve division related bit operations
* [ARROW-7470](https://issues.apache.org/jira/browse/ARROW-7470) - [JS] Fix typos
* [ARROW-7474](https://issues.apache.org/jira/browse/ARROW-7474) - [Ruby] Save CSV files faster
* [ARROW-7475](https://issues.apache.org/jira/browse/ARROW-7475) - [Rust] Create Arrow Stream writer
* [ARROW-7477](https://issues.apache.org/jira/browse/ARROW-7477) - [FlightRPC][Java] Flight gRPC service is missing reflection info
* [ARROW-7479](https://issues.apache.org/jira/browse/ARROW-7479) - [Rust][Ruby][R] Fix typos
* [ARROW-7481](https://issues.apache.org/jira/browse/ARROW-7481) - [C\#] Fix typos
* [ARROW-7482](https://issues.apache.org/jira/browse/ARROW-7482) - [C++] Fix typos
* [ARROW-7484](https://issues.apache.org/jira/browse/ARROW-7484) - [C++][Gandiva] Fix typos
* [ARROW-7485](https://issues.apache.org/jira/browse/ARROW-7485) - [C++][Plasma] Fix typos
* [ARROW-7487](https://issues.apache.org/jira/browse/ARROW-7487) - [Developer] Fix typos
* [ARROW-7488](https://issues.apache.org/jira/browse/ARROW-7488) - [GLib] Fix typos and broken links
* [ARROW-7489](https://issues.apache.org/jira/browse/ARROW-7489) - [CI] Fix typos
* [ARROW-7490](https://issues.apache.org/jira/browse/ARROW-7490) - [Java] Avro converter should convert attributes and props to FieldType metadata
* [ARROW-7493](https://issues.apache.org/jira/browse/ARROW-7493) - [Python] Expose sum kernel in pyarrow.compute and support ChunkedArray inputs
* [ARROW-7498](https://issues.apache.org/jira/browse/ARROW-7498) - [C++][Dataset] Rename DataFragment/DataSource/PartitionScheme
* [ARROW-7502](https://issues.apache.org/jira/browse/ARROW-7502) - [Integration] Remove Spark Integration patch that not needed anymore
* [ARROW-7513](https://issues.apache.org/jira/browse/ARROW-7513) - [JS] Arrow Tutorial: Common data types
* [ARROW-7514](https://issues.apache.org/jira/browse/ARROW-7514) - [C\#] Make GetValueOffset Obsolete
* [ARROW-7519](https://issues.apache.org/jira/browse/ARROW-7519) - [Python] Build wheels, conda packages with dataset support
* [ARROW-7521](https://issues.apache.org/jira/browse/ARROW-7521) - [Rust] Remove tuple on FixedSizeList datatype
* [ARROW-7523](https://issues.apache.org/jira/browse/ARROW-7523) - [Developer] Relax clang-tidy check
* [ARROW-7526](https://issues.apache.org/jira/browse/ARROW-7526) - [C++][Compute]: Optimize small integer sorting
* [ARROW-7532](https://issues.apache.org/jira/browse/ARROW-7532) - [CI] Unskip brew test after Homebrew fixes it upstream
* [ARROW-7537](https://issues.apache.org/jira/browse/ARROW-7537) - [CI][R] Nightly macOS autobrew job should be more verbose if it fails
* [ARROW-7538](https://issues.apache.org/jira/browse/ARROW-7538) - Clarify actual and desired size in AllocationManager
* [ARROW-7540](https://issues.apache.org/jira/browse/ARROW-7540) - [C++] License files aren't installed
* [ARROW-7541](https://issues.apache.org/jira/browse/ARROW-7541) - [GLib] Install license files
* [ARROW-7542](https://issues.apache.org/jira/browse/ARROW-7542) - [CI][C++] nproc isn't available on macOS
* [ARROW-7549](https://issues.apache.org/jira/browse/ARROW-7549) - [Java] Reorganize Flight modules to keep top level clean/organized
* [ARROW-7550](https://issues.apache.org/jira/browse/ARROW-7550) - [R][CI] Run donttest examples in CI
* [ARROW-7557](https://issues.apache.org/jira/browse/ARROW-7557) - [C++][Compute] Validate sorting stability in random test
* [ARROW-7558](https://issues.apache.org/jira/browse/ARROW-7558) - [Packaging][deb][RPM] Use the host owner and group for artifacts
* [ARROW-7560](https://issues.apache.org/jira/browse/ARROW-7560) - [Rust] Reduce Rc/Refcell usage
* [ARROW-7565](https://issues.apache.org/jira/browse/ARROW-7565) - [Website] Add support for download URL redirect
* [ARROW-7566](https://issues.apache.org/jira/browse/ARROW-7566) - [CI] Use more recent Miniconda on AppVeyor
* [ARROW-7567](https://issues.apache.org/jira/browse/ARROW-7567) - [Java] Bump Checkstyle from 6.19 to 8.18
* [ARROW-7567](https://issues.apache.org/jira/browse/ARROW-7567) - [Java] Bump Checkstyle from 6.19 to 8.18
* [ARROW-7568](https://issues.apache.org/jira/browse/ARROW-7568) - [Java] Bump Apache Avro from 1.9.0 to 1.9.1
* [ARROW-7569](https://issues.apache.org/jira/browse/ARROW-7569) - [Python] Add API to map Arrow types to pandas ExtensionDtypes for to\_pandas conversions
* [ARROW-7570](https://issues.apache.org/jira/browse/ARROW-7570) - [Java] Fix high severity issues reported by LGTM
* [ARROW-7571](https://issues.apache.org/jira/browse/ARROW-7571) - [Java] Correct minimal java version on README
* [ARROW-7572](https://issues.apache.org/jira/browse/ARROW-7572) - [Java] Enfore Maven 3.3+ as mentioned in README
* [ARROW-7573](https://issues.apache.org/jira/browse/ARROW-7573) - [Rust] Reduce boxing and cleanup
* [ARROW-7575](https://issues.apache.org/jira/browse/ARROW-7575) - [R] Linux binary packaging followup
* [ARROW-7576](https://issues.apache.org/jira/browse/ARROW-7576) - [C++][Dev] Improve fuzzing setup
* [ARROW-7577](https://issues.apache.org/jira/browse/ARROW-7577) - [C++][CI] Check fuzzer setup in CI
* [ARROW-7578](https://issues.apache.org/jira/browse/ARROW-7578) - [R] Add support for datasets with IPC files and with multiple sources
* [ARROW-7580](https://issues.apache.org/jira/browse/ARROW-7580) - [Website] 0.16 release post
* [ARROW-7581](https://issues.apache.org/jira/browse/ARROW-7581) - [R] Documentation/polishing for 0.16 release
* [ARROW-7590](https://issues.apache.org/jira/browse/ARROW-7590) - [C++] Managed files in thirdparty/ are ignored
* [ARROW-7597](https://issues.apache.org/jira/browse/ARROW-7597) - [C++] Improvements to CMake configuration console summary
* [ARROW-7600](https://issues.apache.org/jira/browse/ARROW-7600) - [C++][Parquet] Add a basic disabled unit test to excercise nesting functionality
* [ARROW-7601](https://issues.apache.org/jira/browse/ARROW-7601) - [Doc] [C++] Update fuzzing documentation
* [ARROW-7602](https://issues.apache.org/jira/browse/ARROW-7602) - [Archery] Add more build options
* [ARROW-7613](https://issues.apache.org/jira/browse/ARROW-7613) - [Rust] Remove redundant \`::\` prefixes
* [ARROW-7622](https://issues.apache.org/jira/browse/ARROW-7622) - [Format] Mark Tensor and SparseTensor fields required
* [ARROW-7623](https://issues.apache.org/jira/browse/ARROW-7623) - [C++] Update generated flatbuffers files
* [ARROW-7626](https://issues.apache.org/jira/browse/ARROW-7626) - [Parquet][GLib] Add support for version macros
* [ARROW-7627](https://issues.apache.org/jira/browse/ARROW-7627) - [C++][Gandiva] Optimize string truncate function
* [ARROW-7629](https://issues.apache.org/jira/browse/ARROW-7629) - [C++][CI] Add fuzz regression files to arrow-testing
* [ARROW-7630](https://issues.apache.org/jira/browse/ARROW-7630) - [C++][CI] Check fuzz crash regressions in CI
* [ARROW-7632](https://issues.apache.org/jira/browse/ARROW-7632) - [C++] [CI] Improve fuzzing seed corpus
* [ARROW-7635](https://issues.apache.org/jira/browse/ARROW-7635) - [C++] Add pkg-config support for each components
* [ARROW-7636](https://issues.apache.org/jira/browse/ARROW-7636) - [Python] Clean-up the pyarrow.dataset.partitioning() API
* [ARROW-7644](https://issues.apache.org/jira/browse/ARROW-7644) - Add vcpkg installation instructions
* [ARROW-7645](https://issues.apache.org/jira/browse/ARROW-7645) - [Packaging][deb][RPM] arm64 build by crossbow is broken
* [ARROW-7648](https://issues.apache.org/jira/browse/ARROW-7648) - [C++] Sanitize local paths on Windows
* [ARROW-7658](https://issues.apache.org/jira/browse/ARROW-7658) - [R] Support dplyr filtering on date/time
* [ARROW-7659](https://issues.apache.org/jira/browse/ARROW-7659) - [Rust] Reduce Rc usage
* [ARROW-7660](https://issues.apache.org/jira/browse/ARROW-7660) - [C++][Gandiva] Optimise castVarchar(string, int) function for single byte characters
* [ARROW-7665](https://issues.apache.org/jira/browse/ARROW-7665) - [R] linuxLibs.R should build in parallel
* [ARROW-7666](https://issues.apache.org/jira/browse/ARROW-7666) - [Packaging][deb] Always use NInja to reduce build time
* [ARROW-7667](https://issues.apache.org/jira/browse/ARROW-7667) - [Packaging][deb] ubuntu-eoan is missing in nightly jobs
* [ARROW-7668](https://issues.apache.org/jira/browse/ARROW-7668) - [Packaging][RPM] Use NInja if possible to reduce build time
* [ARROW-7670](https://issues.apache.org/jira/browse/ARROW-7670) - [Python][Dataset] Better ergonomics for the filter expressions
* [ARROW-7671](https://issues.apache.org/jira/browse/ARROW-7671) - [Python][Dataset] Add bindings for the DatasetFactory
* [ARROW-7674](https://issues.apache.org/jira/browse/ARROW-7674) - Add helpful message for captcha challenge in merge\_arrow\_pr.py
* [ARROW-7682](https://issues.apache.org/jira/browse/ARROW-7682) - [Packaging][APT][Yum] Add support for arm64 APT/Yum repositories
* [ARROW-7683](https://issues.apache.org/jira/browse/ARROW-7683) - [Packaging] Set 0.16.0 as the next version
* [ARROW-7686](https://issues.apache.org/jira/browse/ARROW-7686) - [Packaging][deb][RPM] Include more arrow-\*.pc
* [ARROW-7687](https://issues.apache.org/jira/browse/ARROW-7687) - [C++] C++ developer document links in README are broken
* [ARROW-7692](https://issues.apache.org/jira/browse/ARROW-7692) - [Rust] Several pattern matches are hard to read
* [ARROW-7694](https://issues.apache.org/jira/browse/ARROW-7694) - [Packaging][deb][RPM] Can't build repository packages for RC
* [ARROW-7695](https://issues.apache.org/jira/browse/ARROW-7695) - [Release] Update java versions to 0.16-SNAPSHOT
* [ARROW-7696](https://issues.apache.org/jira/browse/ARROW-7696) - [Release] Unit test on release branch is failed
* [ARROW-7697](https://issues.apache.org/jira/browse/ARROW-7697) - [Release] Add a test for updating Linux packages by 00-prepare.sh
* [ARROW-7710](https://issues.apache.org/jira/browse/ARROW-7710) - [Release][C\#] .NET download URL is redirected
* [ARROW-7711](https://issues.apache.org/jira/browse/ARROW-7711) - [C\#] Date32 test depends on system timezone
* [ARROW-7715](https://issues.apache.org/jira/browse/ARROW-7715) - [Release][APT] Ignore some arm64 verifications
* [ARROW-7716](https://issues.apache.org/jira/browse/ARROW-7716) - [Packaging][APT] Use the "main" component for Ubuntu 19.10
* [ARROW-7719](https://issues.apache.org/jira/browse/ARROW-7719) - [Python][Dataset] Table equality check occasionally fails
* [ARROW-7724](https://issues.apache.org/jira/browse/ARROW-7724) - [Release][Yum] Ignore some arm64 verifications
* [ARROW-7743](https://issues.apache.org/jira/browse/ARROW-7743) - [Rust] [Parquet] Support reading timestamp micros
* [ARROW-7768](https://issues.apache.org/jira/browse/ARROW-7768) - [Rust] Implement Length and TryClone traits for Cursor<Vec<u8\>\> in reader.rs
* [ARROW-8015](https://issues.apache.org/jira/browse/ARROW-8015) - [Python] Build 0.16.0 wheel install for Windows + Python 3.5 and publish to PyPI
* [PARQUET-517](https://issues.apache.org/jira/browse/PARQUET-517) - [C++] Use arrow::MemoryPool for all heap allocations
* [PARQUET-1300](https://issues.apache.org/jira/browse/PARQUET-1300) - [C++] Parquet modular encryption
* [PARQUET-1664](https://issues.apache.org/jira/browse/PARQUET-1664) - [C++] Provide API to return metadata string from FileMetadata.
* [PARQUET-1678](https://issues.apache.org/jira/browse/PARQUET-1678) - [C++] Provide classes for reading/writing using input/output operators
* [PARQUET-1688](https://issues.apache.org/jira/browse/PARQUET-1688) - [C++] StreamWriter/StreamReader can't be built with g++ 4.8.5 on CentOS 7
* [PARQUET-1689](https://issues.apache.org/jira/browse/PARQUET-1689) - [C++] Stream API: Allow for columns/rows to be skipped when reading
* [PARQUET-1701](https://issues.apache.org/jira/browse/PARQUET-1701) - [C++] Stream API: Add support for optional fields
* [PARQUET-1704](https://issues.apache.org/jira/browse/PARQUET-1704) - [C++] Add re-usable encryption buffer to SerializedPageWriter
* [PARQUET-1705](https://issues.apache.org/jira/browse/PARQUET-1705) - [C++] Disable shrink-to-fit on the re-usable decryption buffer
* [PARQUET-1712](https://issues.apache.org/jira/browse/PARQUET-1712) - [C++] Stop using deprecated APIs in examples
* [PARQUET-1721](https://issues.apache.org/jira/browse/PARQUET-1721) - [C++] Arrow dependency is missing in parquet.pc
* [PARQUET-1734](https://issues.apache.org/jira/browse/PARQUET-1734) - [C++] Fix typos
* [PARQUET-1769](https://issues.apache.org/jira/browse/PARQUET-1769) - [C++] Update to parquet-format 2.8.0



# Apache Arrow 0.15.1 (2019-11-01)

## Bug Fixes

* [ARROW-6464](https://issues.apache.org/jira/browse/ARROW-6464) - [Java] Refactor FixedSizeListVector\#splitAndTransfer with slice API
* [ARROW-6728](https://issues.apache.org/jira/browse/ARROW-6728) - [C\#] Support reading and writing Date32 and Date64 arrays
* [ARROW-6740](https://issues.apache.org/jira/browse/ARROW-6740) - [Python] Unable to delete closed MemoryMappedFile on Windows
* [ARROW-6762](https://issues.apache.org/jira/browse/ARROW-6762) - [C++] JSON reader segfaults on newline
* [ARROW-6795](https://issues.apache.org/jira/browse/ARROW-6795) - [C\#] Reading large Arrow files in C\# results in an exception
* [ARROW-6806](https://issues.apache.org/jira/browse/ARROW-6806) - [C++] Segfault deserializing ListArray containing null/empty list
* [ARROW-6809](https://issues.apache.org/jira/browse/ARROW-6809) - [RUBY] Gem does not install on macOS due to glib2 3.3.7 compilation failure
* [ARROW-6813](https://issues.apache.org/jira/browse/ARROW-6813) - [Ruby] Arrow::Table.load with headers=true leads to exception in Arrow 0.15
* [ARROW-6834](https://issues.apache.org/jira/browse/ARROW-6834) - [C++] Pin gtest to 1.8.1 to triage failing Appveyor / MSVC build
* [ARROW-6844](https://issues.apache.org/jira/browse/ARROW-6844) - [C++][Parquet][Python] List<scalar type\> columns read broken with 0.15.0
* [ARROW-6857](https://issues.apache.org/jira/browse/ARROW-6857) - [Python][C++] Segfault for dictionary\_encode on empty chunked\_array (edge case)
* [ARROW-6860](https://issues.apache.org/jira/browse/ARROW-6860) - [Python] Only link libarrow\_flight.so to pyarrow.\_flight
* [ARROW-6861](https://issues.apache.org/jira/browse/ARROW-6861) - [Python] arrow-0.15.0 reading arrow-0.14.1-output Parquet dictionary column: Failure reading column: IOError: Arrow error: Invalid: Resize cannot downsize
* [ARROW-6869](https://issues.apache.org/jira/browse/ARROW-6869) - [C++] Dictionary "delta" building logic in builder\_dict.h produces invalid arrays
* [ARROW-6873](https://issues.apache.org/jira/browse/ARROW-6873) - [Python] Stale CColumn reference break Cython cimport pyarrow
* [ARROW-6874](https://issues.apache.org/jira/browse/ARROW-6874) - [Python] Memory leak in Table.to\_pandas() when conversion to object dtype
* [ARROW-6876](https://issues.apache.org/jira/browse/ARROW-6876) - [Python] Reading parquet file with many columns becomes slow for 0.15.0
* [ARROW-6877](https://issues.apache.org/jira/browse/ARROW-6877) - [C++] Boost not found from the correct environment
* [ARROW-6878](https://issues.apache.org/jira/browse/ARROW-6878) - [Python] pa.array() does not handle list of dicts with bytes keys correctly under python3
* [ARROW-6882](https://issues.apache.org/jira/browse/ARROW-6882) - [Python] cannot create a chunked\_array from dictionary\_encoding result
* [ARROW-6886](https://issues.apache.org/jira/browse/ARROW-6886) - [C++] arrow::io header nvcc compiler warnings
* [ARROW-6898](https://issues.apache.org/jira/browse/ARROW-6898) - [Java] Fix potential memory leak in ArrowWriter and several test classes
* [ARROW-6903](https://issues.apache.org/jira/browse/ARROW-6903) - [Python] Wheels broken after ARROW-6860 changes
* [ARROW-6905](https://issues.apache.org/jira/browse/ARROW-6905) - [Packaging][OSX] Nightly builds on MacOS are failing because of brew compile timeouts
* [ARROW-6910](https://issues.apache.org/jira/browse/ARROW-6910) - [Python] pyarrow.parquet.read\_table(...) takes up lots of memory which is not released until program exits
* [ARROW-6922](https://issues.apache.org/jira/browse/ARROW-6922) - [Python] Pandas master build is failing (MultiIndex.levels change)
* [ARROW-6937](https://issues.apache.org/jira/browse/ARROW-6937) - [Packaging][Python] Fix conda linux and OSX wheel nightly builds
* [ARROW-6938](https://issues.apache.org/jira/browse/ARROW-6938) - [Python] Windows wheel depends on zstd.dll and libbz2.dll, which are not bundled
* [ARROW-6962](https://issues.apache.org/jira/browse/ARROW-6962) - [C++] [CI] Stop compiling with -Weverything
* [ARROW-6977](https://issues.apache.org/jira/browse/ARROW-6977) - [C++] Only enable jemalloc background\_thread if feature is supported
* [ARROW-6983](https://issues.apache.org/jira/browse/ARROW-6983) - [C++] Threaded task group crashes sometimes
* [ARROW-7422](https://issues.apache.org/jira/browse/ARROW-7422) - [Python] Improper CPU flags failing pyarrow install in ARM devices
* [ARROW-7423](https://issues.apache.org/jira/browse/ARROW-7423) - Pyarrow ARM install fails from source with no clear error
* [ARROW-9349](https://issues.apache.org/jira/browse/ARROW-9349) - [Python] parquet.read\_table causes crashes on Windows Server 2016 w/ Xeon Processor


## New Features and Improvements

* [ARROW-6610](https://issues.apache.org/jira/browse/ARROW-6610) - [C++] Add ARROW\_FILESYSTEM=ON/OFF CMake configuration flag
* [ARROW-6661](https://issues.apache.org/jira/browse/ARROW-6661) - [Java] Implement APIs like slice to enhance VectorSchemaRoot
* [ARROW-6777](https://issues.apache.org/jira/browse/ARROW-6777) - [GLib][CI] Unpin gobject-introspection gem
* [ARROW-6852](https://issues.apache.org/jira/browse/ARROW-6852) - [C++] memory-benchmark build failed on Arm64
* [ARROW-6927](https://issues.apache.org/jira/browse/ARROW-6927) - [C++] Add gRPC version check
* [ARROW-6963](https://issues.apache.org/jira/browse/ARROW-6963) - [Packaging][Wheel][OSX] Use crossbow's command to deploy artifacts from travis builds



# Apache Arrow 0.15.0 (2019-10-05)

## New Features and Improvements

* [ARROW-453](https://issues.apache.org/jira/browse/ARROW-453) - [C++] Add filesystem implementation for Amazon S3
* [ARROW-517](https://issues.apache.org/jira/browse/ARROW-517) - [C++] Verbose Array::Equals
* [ARROW-750](https://issues.apache.org/jira/browse/ARROW-750) - [Format] Add LargeBinary and LargeString types
* [ARROW-1324](https://issues.apache.org/jira/browse/ARROW-1324) - [C++] Support ARROW\_BOOST\_VENDORED on Windows / MSVC
* [ARROW-1561](https://issues.apache.org/jira/browse/ARROW-1561) - [C++] Kernel implementations for "isin" (set containment)
* [ARROW-1566](https://issues.apache.org/jira/browse/ARROW-1566) - [C++] Implement non-materializing sort kernels
* [ARROW-1741](https://issues.apache.org/jira/browse/ARROW-1741) - [C++] Comparison function for DictionaryArray to determine if indices are "compatible"
* [ARROW-1786](https://issues.apache.org/jira/browse/ARROW-1786) - [Format] List expected on-wire buffer layouts for each kind of Arrow physical type in specification
* [ARROW-1789](https://issues.apache.org/jira/browse/ARROW-1789) - [Format] Consolidate specification documents and improve clarity for new implementation authors
* [ARROW-1875](https://issues.apache.org/jira/browse/ARROW-1875) - [Java] Write 64-bit ints as strings in integration test JSON files
* [ARROW-2006](https://issues.apache.org/jira/browse/ARROW-2006) - [C++] Add option to trim excess padding when writing IPC messages
* [ARROW-2431](https://issues.apache.org/jira/browse/ARROW-2431) - [Rust] Schema fidelity
* [ARROW-2769](https://issues.apache.org/jira/browse/ARROW-2769) - [C++][Python] Deprecate and rename add\_metadata methods
* [ARROW-2931](https://issues.apache.org/jira/browse/ARROW-2931) - [Crossbow] Windows builds are attempting to run linux and osx packaging tasks
* [ARROW-3032](https://issues.apache.org/jira/browse/ARROW-3032) - [Python] Clean up NumPy-related C++ headers
* [ARROW-3204](https://issues.apache.org/jira/browse/ARROW-3204) - [R] Enable package to be made available on CRAN
* [ARROW-3243](https://issues.apache.org/jira/browse/ARROW-3243) - [C++] Upgrade jemalloc to version 5
* [ARROW-3246](https://issues.apache.org/jira/browse/ARROW-3246) - [Python][Parquet] direct reading/writing of pandas categoricals in parquet
* [ARROW-3325](https://issues.apache.org/jira/browse/ARROW-3325) - [Python] Support reading Parquet binary/string columns directly as DictionaryArray
* [ARROW-3325](https://issues.apache.org/jira/browse/ARROW-3325) - [Python] Support reading Parquet binary/string columns directly as DictionaryArray
* [ARROW-3531](https://issues.apache.org/jira/browse/ARROW-3531) - [Python] Deprecate Schema.field\_by\_name in favor of \_\_getitem\_\_
* [ARROW-3538](https://issues.apache.org/jira/browse/ARROW-3538) - [Python] ability to override the automated assignment of uuid for filenames when writing datasets
* [ARROW-3579](https://issues.apache.org/jira/browse/ARROW-3579) - [Crossbow] Unintuitive error message when remote branch has not been pushed
* [ARROW-3643](https://issues.apache.org/jira/browse/ARROW-3643) - [Rust] Optimize \`push\_slice\` of \`BufferBuilder<bool\>\`
* [ARROW-3710](https://issues.apache.org/jira/browse/ARROW-3710) - [Crossbow][Python] Run nightly tests against pandas master
* [ARROW-3772](https://issues.apache.org/jira/browse/ARROW-3772) - [C++] Read Parquet dictionary encoded ColumnChunks directly into an Arrow DictionaryArray
* [ARROW-3777](https://issues.apache.org/jira/browse/ARROW-3777) - [C++] Implement a mock "high latency" filesystem
* [ARROW-3817](https://issues.apache.org/jira/browse/ARROW-3817) - [R] $ method for RecordBatch
* [ARROW-3829](https://issues.apache.org/jira/browse/ARROW-3829) - [Python] Support protocols to extract Arrow objects from third-party classes
* [ARROW-3943](https://issues.apache.org/jira/browse/ARROW-3943) - [R] Write vignette for R package
* [ARROW-4036](https://issues.apache.org/jira/browse/ARROW-4036) - [C++] Make status codes pluggable
* [ARROW-4095](https://issues.apache.org/jira/browse/ARROW-4095) - [C++] Implement optimizations for dictionary unification where dictionaries are prefixes of the unified dictionary
* [ARROW-4111](https://issues.apache.org/jira/browse/ARROW-4111) - [Python] Create time types from Python sequences of integers
* [ARROW-4218](https://issues.apache.org/jira/browse/ARROW-4218) - [Rust] [Parquet] Implement ColumnReader
* [ARROW-4220](https://issues.apache.org/jira/browse/ARROW-4220) - [Python] Add buffered input and output stream ASV benchmarks with simulated high latency IO
* [ARROW-4365](https://issues.apache.org/jira/browse/ARROW-4365) - [Rust] [Parquet] Implement RecordReader
* [ARROW-4398](https://issues.apache.org/jira/browse/ARROW-4398) - [Python] Add benchmarks for Arrow<\>Parquet BYTE\_ARRAY serialization (read and write)
* [ARROW-4473](https://issues.apache.org/jira/browse/ARROW-4473) - [Website] Add instructions to do a test-deploy of Arrow website and fix bugs
* [ARROW-4507](https://issues.apache.org/jira/browse/ARROW-4507) - [Format] Create outline and introduction for new document.
* [ARROW-4508](https://issues.apache.org/jira/browse/ARROW-4508) - [Format] Copy content from Layout.rst to new document.
* [ARROW-4509](https://issues.apache.org/jira/browse/ARROW-4509) - [Format] Copy content from Metadata.rst to new document.
* [ARROW-4510](https://issues.apache.org/jira/browse/ARROW-4510) - [Format] copy content from IPC.rst to new document.
* [ARROW-4511](https://issues.apache.org/jira/browse/ARROW-4511) - [Format] remove individual documents in favor of new document once all content is moved
* [ARROW-4648](https://issues.apache.org/jira/browse/ARROW-4648) - [C++/Question] Naming/organizational inconsistencies in cpp codebase
* [ARROW-4648](https://issues.apache.org/jira/browse/ARROW-4648) - [C++/Question] Naming/organizational inconsistencies in cpp codebase
* [ARROW-4649](https://issues.apache.org/jira/browse/ARROW-4649) - [C++/CI/R] Add (nightly) job that builds \`brew install apache-arrow --HEAD\`
* [ARROW-4752](https://issues.apache.org/jira/browse/ARROW-4752) - [Rust] Add explicit SIMD vectorization for the divide kernel
* [ARROW-4810](https://issues.apache.org/jira/browse/ARROW-4810) - [Format][C++] Add "LargeList" type with 64-bit offsets
* [ARROW-4841](https://issues.apache.org/jira/browse/ARROW-4841) - [C++] Persist CMake options in generated CMake config
* [ARROW-4860](https://issues.apache.org/jira/browse/ARROW-4860) - [C++] Build AWS C++ SDK for Windows in conda-forge
* [ARROW-5134](https://issues.apache.org/jira/browse/ARROW-5134) - [R][CI] Run nightly tests against multiple R versions
* [ARROW-5211](https://issues.apache.org/jira/browse/ARROW-5211) - [Format] Missing documentation under \`Dictionary encoding\` section on MetaData page
* [ARROW-5216](https://issues.apache.org/jira/browse/ARROW-5216) - [CI] Add Appveyor badge to README
* [ARROW-5307](https://issues.apache.org/jira/browse/ARROW-5307) - [CI][GLib] Enable GTK-Doc
* [ARROW-5337](https://issues.apache.org/jira/browse/ARROW-5337) - [C++] Add RecordBatch::field method, possibly deprecate "column"
* [ARROW-5343](https://issues.apache.org/jira/browse/ARROW-5343) - [C++] Consider using Buffer for transpose maps in DictionaryType::Unify instead of std::vector
* [ARROW-5344](https://issues.apache.org/jira/browse/ARROW-5344) - [C++] Use ArrayDataVisitor in implementation of dictionary unpacking in compute/kernels/cast.cc
* [ARROW-5351](https://issues.apache.org/jira/browse/ARROW-5351) - [Rust] Add support for take kernel functions
* [ARROW-5358](https://issues.apache.org/jira/browse/ARROW-5358) - [Rust] Implement equality check for ArrayData and Array
* [ARROW-5380](https://issues.apache.org/jira/browse/ARROW-5380) - [C++] Fix and enable UBSan for unaligned accesses.
* [ARROW-5439](https://issues.apache.org/jira/browse/ARROW-5439) - [Java] Utilize stream EOS in File format
* [ARROW-5444](https://issues.apache.org/jira/browse/ARROW-5444) - [Release][Website] After 0.14 release, update what is an "official" release
* [ARROW-5458](https://issues.apache.org/jira/browse/ARROW-5458) - [C++] ARMv8 parallel CRC32c computation optimization
* [ARROW-5480](https://issues.apache.org/jira/browse/ARROW-5480) - [Python] Pandas categorical type doesn't survive a round-trip through parquet
* [ARROW-5483](https://issues.apache.org/jira/browse/ARROW-5483) - [Java] add ValueVector constructors that take a Field object
* [ARROW-5494](https://issues.apache.org/jira/browse/ARROW-5494) - [Python] Create FileSystem bindings
* [ARROW-5505](https://issues.apache.org/jira/browse/ARROW-5505) - [R] Stop masking base R functions/rethink namespacing
* [ARROW-5527](https://issues.apache.org/jira/browse/ARROW-5527) - [C++] HashTable/MemoTable should use Buffer(s)/Builder(s) for heap data
* [ARROW-5558](https://issues.apache.org/jira/browse/ARROW-5558) - [C++] Support Array::View on arrays with non-zero offsets
* [ARROW-5559](https://issues.apache.org/jira/browse/ARROW-5559) - [C++] Introduce IpcOptions struct object for better API-stability when adding new options
* [ARROW-5564](https://issues.apache.org/jira/browse/ARROW-5564) - [C++] Add uriparser to conda-forge
* [ARROW-5579](https://issues.apache.org/jira/browse/ARROW-5579) - [Java] shade flatbuffer dependency
* [ARROW-5580](https://issues.apache.org/jira/browse/ARROW-5580) - [C++][Gandiva] Correct definitions of timestamp functions in Gandiva
* [ARROW-5588](https://issues.apache.org/jira/browse/ARROW-5588) - [C++] Better support for building UnionArrays
* [ARROW-5594](https://issues.apache.org/jira/browse/ARROW-5594) - [C++] add support for UnionArrays to Take and Filter
* [ARROW-5610](https://issues.apache.org/jira/browse/ARROW-5610) - [Python] Define extension type API in Python to "receive" or "send" a foreign extension type
* [ARROW-5646](https://issues.apache.org/jira/browse/ARROW-5646) - [Crossbow][Documentation] Move the user guide to the Sphinx documentation
* [ARROW-5681](https://issues.apache.org/jira/browse/ARROW-5681) - [FlightRPC] Wrap gRPC exceptions/statuses
* [ARROW-5686](https://issues.apache.org/jira/browse/ARROW-5686) - [R] Review R Windows CI build
* [ARROW-5716](https://issues.apache.org/jira/browse/ARROW-5716) - [Developer] Improve merge PR script to acknowledge co-authors
* [ARROW-5717](https://issues.apache.org/jira/browse/ARROW-5717) - [Python] Support dictionary unification when converting variable dictionaries to pandas
* [ARROW-5719](https://issues.apache.org/jira/browse/ARROW-5719) - [Java] Support in-place vector sorting
* [ARROW-5722](https://issues.apache.org/jira/browse/ARROW-5722) - [Rust] Implement std::fmt::Debug for ListArray, BinaryArray and StructArray
* [ARROW-5734](https://issues.apache.org/jira/browse/ARROW-5734) - [Python] Dispatch to Table.from\_arrays from pyarrow.table factory function
* [ARROW-5736](https://issues.apache.org/jira/browse/ARROW-5736) - [Format][C++] Support small bit-width indices in sparse tensor
* [ARROW-5741](https://issues.apache.org/jira/browse/ARROW-5741) - [JS] Make numeric vector from functions consistent with TypedArray.from
* [ARROW-5743](https://issues.apache.org/jira/browse/ARROW-5743) - [C++] Add CMake option to enable "large memory" unit tests
* [ARROW-5746](https://issues.apache.org/jira/browse/ARROW-5746) - [Website] Move website source out of apache/arrow
* [ARROW-5747](https://issues.apache.org/jira/browse/ARROW-5747) - [C++] Better column name and header support in CSV reader
* [ARROW-5758](https://issues.apache.org/jira/browse/ARROW-5758) - [C++][Gandiva] Support casting decimals to varchar and vice versa
* [ARROW-5762](https://issues.apache.org/jira/browse/ARROW-5762) - [Integration][JS] Integration Tests for Map Type
* [ARROW-5777](https://issues.apache.org/jira/browse/ARROW-5777) - [C++] BasicDecimal128 is a small object it doesn't always make sense to pass by const ref
* [ARROW-5778](https://issues.apache.org/jira/browse/ARROW-5778) - [Java] Extract the logic for vector data copying to the super classes
* [ARROW-5784](https://issues.apache.org/jira/browse/ARROW-5784) - [Release][GLib] Replace c\_glib/ after running c\_glib/autogen.sh in dev/release/02-source.sh
* [ARROW-5786](https://issues.apache.org/jira/browse/ARROW-5786) - [Release] Use arrow-jni profile in dev/release/01-prepare.sh
* [ARROW-5788](https://issues.apache.org/jira/browse/ARROW-5788) - [Rust] Use { version = "...", path = "../..." } for arrow and parquet dependencies
* [ARROW-5789](https://issues.apache.org/jira/browse/ARROW-5789) - [C++] Small Warning/Linkage cleanups
* [ARROW-5792](https://issues.apache.org/jira/browse/ARROW-5792) - [Rust] [Parquet] A visitor trait for parquet types.
* [ARROW-5798](https://issues.apache.org/jira/browse/ARROW-5798) - [Packaging][deb] Update doc architecture
* [ARROW-5800](https://issues.apache.org/jira/browse/ARROW-5800) - [R] Dockerize R Travis CI tests so they can be run anywhere via docker-compose
* [ARROW-5803](https://issues.apache.org/jira/browse/ARROW-5803) - [C++] Dockerize C++ with clang 7 Travis CI unit test logic
* [ARROW-5812](https://issues.apache.org/jira/browse/ARROW-5812) - [Java] Refactor method name and param type in BaseIntVector
* [ARROW-5813](https://issues.apache.org/jira/browse/ARROW-5813) - [C++] Support checking the equality of the different contiguous tensors
* [ARROW-5814](https://issues.apache.org/jira/browse/ARROW-5814) - [Java] Implement a <Object, int\> HashMap for DictionaryEncoder
* [ARROW-5827](https://issues.apache.org/jira/browse/ARROW-5827) - [C++] Require c-ares CMake config
* [ARROW-5828](https://issues.apache.org/jira/browse/ARROW-5828) - [C++] Add Protocol Buffers version check
* [ARROW-5830](https://issues.apache.org/jira/browse/ARROW-5830) - [C++] Stop using memcmp in TensorEquals
* [ARROW-5832](https://issues.apache.org/jira/browse/ARROW-5832) - [Java] Support search operations for vector data
* [ARROW-5833](https://issues.apache.org/jira/browse/ARROW-5833) - [C++] Factor out status copying code from cast.cc
* [ARROW-5834](https://issues.apache.org/jira/browse/ARROW-5834) - [Java] Apply new hash map in DictionaryEncoder
* [ARROW-5835](https://issues.apache.org/jira/browse/ARROW-5835) - [Java] Support Dictionary Encoding for binary type
* [ARROW-5841](https://issues.apache.org/jira/browse/ARROW-5841) - [Website] Add 0.14.0 release note
* [ARROW-5842](https://issues.apache.org/jira/browse/ARROW-5842) - [Java] Revise the semantic of lastSet in ListVector
* [ARROW-5843](https://issues.apache.org/jira/browse/ARROW-5843) - [Java] Improve the readability and performance of BitVectorHelper\#getNullCount
* [ARROW-5844](https://issues.apache.org/jira/browse/ARROW-5844) - [Java] Support comparison & sort for more numeric types
* [ARROW-5846](https://issues.apache.org/jira/browse/ARROW-5846) - [Java] Create Avro adapter module and add dependencies
* [ARROW-5853](https://issues.apache.org/jira/browse/ARROW-5853) - [Python] Expose boolean filter kernel on Array
* [ARROW-5861](https://issues.apache.org/jira/browse/ARROW-5861) - [Java] Initial implement to convert Avro record with primitive types
* [ARROW-5862](https://issues.apache.org/jira/browse/ARROW-5862) - [Java] Provide dictionary builder
* [ARROW-5864](https://issues.apache.org/jira/browse/ARROW-5864) - [Python] simplify cython wrapping of Result
* [ARROW-5865](https://issues.apache.org/jira/browse/ARROW-5865) - [Release] Helper script for rebasing open pull requests on master
* [ARROW-5866](https://issues.apache.org/jira/browse/ARROW-5866) - [C++] Remove duplicate library in cpp/Brewfile
* [ARROW-5867](https://issues.apache.org/jira/browse/ARROW-5867) - [C++][Gandiva] Add support for cast int to decimal
* [ARROW-5872](https://issues.apache.org/jira/browse/ARROW-5872) - Support mod(double, double) method in Gandiva
* [ARROW-5876](https://issues.apache.org/jira/browse/ARROW-5876) - [FlightRPC] Implement basic auth across all languages
* [ARROW-5877](https://issues.apache.org/jira/browse/ARROW-5877) - [FlightRPC] Fix auth incompatibilities between Python/Java
* [ARROW-5880](https://issues.apache.org/jira/browse/ARROW-5880) - [C++] Update arrow parquet writer to use TypedBufferBuilder
* [ARROW-5881](https://issues.apache.org/jira/browse/ARROW-5881) - [Java] Provide functionalities to efficiently determine if a validity buffer has completely 1 bits/0 bits
* [ARROW-5883](https://issues.apache.org/jira/browse/ARROW-5883) - [Java] Support dictionary encoding for List and Struct type
* [ARROW-5888](https://issues.apache.org/jira/browse/ARROW-5888) - [Python][C++] Add metadata to store Arrow time zones in Parquet file metadata
* [ARROW-5891](https://issues.apache.org/jira/browse/ARROW-5891) - [C++][Gandiva] Remove duplicates in function registries
* [ARROW-5892](https://issues.apache.org/jira/browse/ARROW-5892) - [C++][Gandiva] Support function aliases
* [ARROW-5893](https://issues.apache.org/jira/browse/ARROW-5893) - [C++] Remove arrow::Column class from C++ library
* [ARROW-5897](https://issues.apache.org/jira/browse/ARROW-5897) - [Java] Remove duplicated logic in MapVector
* [ARROW-5898](https://issues.apache.org/jira/browse/ARROW-5898) - [Java] Provide functionality to efficiently compute hash code for arbitrary memory segment
* [ARROW-5900](https://issues.apache.org/jira/browse/ARROW-5900) - [Gandiva] [Java] Decimal precision,scale bounds check
* [ARROW-5901](https://issues.apache.org/jira/browse/ARROW-5901) - [Rust] Implement PartialEq to compare array and json values
* [ARROW-5902](https://issues.apache.org/jira/browse/ARROW-5902) - [Java] Implement hash table and equals & hashCode API for dictionary encoding
* [ARROW-5903](https://issues.apache.org/jira/browse/ARROW-5903) - [Java] Set methods in DecimalVector are slow
* [ARROW-5904](https://issues.apache.org/jira/browse/ARROW-5904) - [Java] [Plasma] Fix compilation of Plasma Java client
* [ARROW-5906](https://issues.apache.org/jira/browse/ARROW-5906) - [CI] Set -DARROW\_VERBOSE\_THIRDPARTY\_BUILD=OFF in builds running in Travis CI, maybe all docker-compose builds by default
* [ARROW-5908](https://issues.apache.org/jira/browse/ARROW-5908) - [C\#] ArrowStreamWriter doesn't align buffers to 8 bytes
* [ARROW-5909](https://issues.apache.org/jira/browse/ARROW-5909) - [Java] Optimize ByteFunctionHelpers equals & compare logic
* [ARROW-5911](https://issues.apache.org/jira/browse/ARROW-5911) - [Java] Make ListVector and MapVector create reader lazily
* [ARROW-5917](https://issues.apache.org/jira/browse/ARROW-5917) - [Java] Redesign the dictionary encoder
* [ARROW-5918](https://issues.apache.org/jira/browse/ARROW-5918) - [Java] Add get to BaseIntVector interface
* [ARROW-5919](https://issues.apache.org/jira/browse/ARROW-5919) - [R] Add nightly tests for building r-arrow with dependencies from conda-forge
* [ARROW-5920](https://issues.apache.org/jira/browse/ARROW-5920) - [Java] Support sort & compare for all variable width vectors
* [ARROW-5924](https://issues.apache.org/jira/browse/ARROW-5924) - [C++][Plasma] It is not convenient to release a GPU object
* [ARROW-5934](https://issues.apache.org/jira/browse/ARROW-5934) - [Python] Bundle arrow's LICENSE with the wheels
* [ARROW-5937](https://issues.apache.org/jira/browse/ARROW-5937) - [Release] Stop parallel binary upload
* [ARROW-5938](https://issues.apache.org/jira/browse/ARROW-5938) - [Release] Create branch for adding release note automatically
* [ARROW-5939](https://issues.apache.org/jira/browse/ARROW-5939) - [Release] Add support for generating vote email template separately
* [ARROW-5940](https://issues.apache.org/jira/browse/ARROW-5940) - [Release] Add support for re-uploading sign/checksum for binary artifacts
* [ARROW-5941](https://issues.apache.org/jira/browse/ARROW-5941) - [Release] Avoid re-uploading already uploaded binary artifacts
* [ARROW-5943](https://issues.apache.org/jira/browse/ARROW-5943) - [GLib][Gandiva] Add support for function aliases
* [ARROW-5944](https://issues.apache.org/jira/browse/ARROW-5944) - [C++][Gandiva] Remove 'div' alias for 'divide'
* [ARROW-5945](https://issues.apache.org/jira/browse/ARROW-5945) - [Rust] [DataFusion] Table trait should support building complete queries
* [ARROW-5947](https://issues.apache.org/jira/browse/ARROW-5947) - [Rust] [DataFusion] Remove serde\_json dependency
* [ARROW-5948](https://issues.apache.org/jira/browse/ARROW-5948) - [Rust] [DataFusion] create\_logical\_plan should not call optimizer
* [ARROW-5955](https://issues.apache.org/jira/browse/ARROW-5955) - [Plasma] Support setting memory quotas per plasma client for better isolation
* [ARROW-5957](https://issues.apache.org/jira/browse/ARROW-5957) - [C++][Gandiva] Implement div function in Gandiva
* [ARROW-5958](https://issues.apache.org/jira/browse/ARROW-5958) - [Python] Link zlib statically in the wheels
* [ARROW-5961](https://issues.apache.org/jira/browse/ARROW-5961) - [R] Be able to run R-only tests even without C++ library
* [ARROW-5962](https://issues.apache.org/jira/browse/ARROW-5962) - [CI][Python] Do not test manylinux1 wheels in Travis CI
* [ARROW-5967](https://issues.apache.org/jira/browse/ARROW-5967) - [Java] DateUtility\#timeZoneList is not correct
* [ARROW-5970](https://issues.apache.org/jira/browse/ARROW-5970) - [Java] Provide pointer to Arrow buffer
* [ARROW-5974](https://issues.apache.org/jira/browse/ARROW-5974) - [Python][C++] Enable CSV reader to read from concatenated gzip stream
* [ARROW-5975](https://issues.apache.org/jira/browse/ARROW-5975) - [C++][Gandiva] Add method to cast Date(in Milliseconds) to timestamp
* [ARROW-5976](https://issues.apache.org/jira/browse/ARROW-5976) - [C++] RETURN\_IF\_ERROR(ctx) should be namespaced
* [ARROW-5977](https://issues.apache.org/jira/browse/ARROW-5977) - [C++] [Python] Method for read\_csv to limit which columns are read?
* [ARROW-5979](https://issues.apache.org/jira/browse/ARROW-5979) - [FlightRPC] Expose (de)serialization of protocol types
* [ARROW-5985](https://issues.apache.org/jira/browse/ARROW-5985) - [Developer] Do not suggest setting Fix Version for point releases in dev/merge\_arrow\_pr.py
* [ARROW-5986](https://issues.apache.org/jira/browse/ARROW-5986) - [Java] Code cleanup for dictionary encoding
* [ARROW-5988](https://issues.apache.org/jira/browse/ARROW-5988) - [Java] Avro adapter implement simple Record type
* [ARROW-5997](https://issues.apache.org/jira/browse/ARROW-5997) - [Java] Support dictionary encoding for Union type
* [ARROW-5998](https://issues.apache.org/jira/browse/ARROW-5998) - [Java] Open a document to track the API changes
* [ARROW-6000](https://issues.apache.org/jira/browse/ARROW-6000) - [Python] Expose LargeBinaryType and LargeStringType
* [ARROW-6008](https://issues.apache.org/jira/browse/ARROW-6008) - [Release] Don't parallelize the bintray upload script
* [ARROW-6009](https://issues.apache.org/jira/browse/ARROW-6009) - [Release][JS] Ignore NPM errors in the javascript release script
* [ARROW-6013](https://issues.apache.org/jira/browse/ARROW-6013) - [Java] Support range searcher
* [ARROW-6017](https://issues.apache.org/jira/browse/ARROW-6017) - [FlightRPC] Allow creating Locations with unknown schemes
* [ARROW-6020](https://issues.apache.org/jira/browse/ARROW-6020) - [Java] Refactor ByteFunctionHelper\#hash with new added ArrowBufHasher
* [ARROW-6021](https://issues.apache.org/jira/browse/ARROW-6021) - [Java] Extract copyFrom and copyFromSafe methods to ValueVector interface
* [ARROW-6022](https://issues.apache.org/jira/browse/ARROW-6022) - [Java] Support equals API in ValueVector to compare two vectors equal
* [ARROW-6023](https://issues.apache.org/jira/browse/ARROW-6023) - [C++][Gandiva] Add functions in Gandiva
* [ARROW-6024](https://issues.apache.org/jira/browse/ARROW-6024) - [Java] Provide more hash algorithms
* [ARROW-6026](https://issues.apache.org/jira/browse/ARROW-6026) - [Doc] Add CONTRIBUTING.md
* [ARROW-6030](https://issues.apache.org/jira/browse/ARROW-6030) - [Java] Efficiently compute hash code for ArrowBufPointer
* [ARROW-6031](https://issues.apache.org/jira/browse/ARROW-6031) - [Java] Support iterating a vector by ArrowBufPointer
* [ARROW-6034](https://issues.apache.org/jira/browse/ARROW-6034) - [C++][Gandiva] Add string functions in Gandiva
* [ARROW-6035](https://issues.apache.org/jira/browse/ARROW-6035) - [Java] Avro adapter support convert nullable value
* [ARROW-6036](https://issues.apache.org/jira/browse/ARROW-6036) - [GLib] Add support for skip rows and column\_names CSV read option
* [ARROW-6037](https://issues.apache.org/jira/browse/ARROW-6037) - [GLib] Add a missing version macro
* [ARROW-6039](https://issues.apache.org/jira/browse/ARROW-6039) - [GLib] Add garrow\_array\_filter()
* [ARROW-6041](https://issues.apache.org/jira/browse/ARROW-6041) - [Website] Blog post announcing R package release
* [ARROW-6042](https://issues.apache.org/jira/browse/ARROW-6042) - [C++] Implement alternative DictionaryBuilder that always yields int32 indices
* [ARROW-6045](https://issues.apache.org/jira/browse/ARROW-6045) - [C++] Benchmark for Parquet float and NaN encoding/decoding
* [ARROW-6048](https://issues.apache.org/jira/browse/ARROW-6048) - [C++] Add ChunkedArray::View which calls to Array::View
* [ARROW-6049](https://issues.apache.org/jira/browse/ARROW-6049) - [C++] Support using Array::View from compatible dictionary type to another
* [ARROW-6053](https://issues.apache.org/jira/browse/ARROW-6053) - [Python] RecordBatchStreamReader::Open2 cdef type signature doesn't match C++
* [ARROW-6063](https://issues.apache.org/jira/browse/ARROW-6063) - [FlightRPC] Implement "half-closed" semantics for DoPut
* [ARROW-6065](https://issues.apache.org/jira/browse/ARROW-6065) - [C++] Reorganize parquet/arrow/reader.cc, remove code duplication, improve readability
* [ARROW-6069](https://issues.apache.org/jira/browse/ARROW-6069) - [Rust] [Parquet] Implement Converter to convert record reader to arrow primitive array.
* [ARROW-6070](https://issues.apache.org/jira/browse/ARROW-6070) - [Java] Avoid creating new schema before IPC sending
* [ARROW-6077](https://issues.apache.org/jira/browse/ARROW-6077) - [C++][Parquet] Build logical schema tree mapping Arrow fields to Parquet schema levels
* [ARROW-6078](https://issues.apache.org/jira/browse/ARROW-6078) - [Java] Implement dictionary-encoded subfields for List type
* [ARROW-6079](https://issues.apache.org/jira/browse/ARROW-6079) - [Java] Implement/test UnionFixedSizeListWriter for FixedSizeListVector
* [ARROW-6080](https://issues.apache.org/jira/browse/ARROW-6080) - [Java] Support compare and search operation for BaseRepeatedValueVector
* [ARROW-6083](https://issues.apache.org/jira/browse/ARROW-6083) - [Java] Refactor Jdbc adapter consume logic
* [ARROW-6084](https://issues.apache.org/jira/browse/ARROW-6084) - [Python] Support LargeList
* [ARROW-6085](https://issues.apache.org/jira/browse/ARROW-6085) - [Rust] [DataFusion] Create traits for phsyical query plan
* [ARROW-6086](https://issues.apache.org/jira/browse/ARROW-6086) - [Rust] [DataFusion] Implement parallel execution for parquet scan
* [ARROW-6087](https://issues.apache.org/jira/browse/ARROW-6087) - [Rust] [DataFusion] Implement parallel execution for CSV scan
* [ARROW-6088](https://issues.apache.org/jira/browse/ARROW-6088) - [Rust] [DataFusion] Implement parallel execution for projection
* [ARROW-6089](https://issues.apache.org/jira/browse/ARROW-6089) - [Rust] [DataFusion] Implement parallel execution for selection
* [ARROW-6090](https://issues.apache.org/jira/browse/ARROW-6090) - [Rust] [DataFusion] Implement parallel execution for hash aggregate
* [ARROW-6093](https://issues.apache.org/jira/browse/ARROW-6093) - [Java] reduce branches in algo for first match in VectorRangeSearcher
* [ARROW-6094](https://issues.apache.org/jira/browse/ARROW-6094) - [Format][Flight] Add GetFlightSchema to Flight RPC
* [ARROW-6096](https://issues.apache.org/jira/browse/ARROW-6096) - [C++] Conditionally depend on boost regex library
* [ARROW-6097](https://issues.apache.org/jira/browse/ARROW-6097) - [Java] Avro adapter implement unions type
* [ARROW-6100](https://issues.apache.org/jira/browse/ARROW-6100) - [Rust] Pin to specific Rust nightly release
* [ARROW-6101](https://issues.apache.org/jira/browse/ARROW-6101) - [Rust] [DataFusion] Create physical plan from logical plan
* [ARROW-6102](https://issues.apache.org/jira/browse/ARROW-6102) - [Testing] Add partitioned CSV file to arrow-testing repo
* [ARROW-6104](https://issues.apache.org/jira/browse/ARROW-6104) - [Rust] [DataFusion] Don't allow bare\_trait\_objects
* [ARROW-6105](https://issues.apache.org/jira/browse/ARROW-6105) - [C++][Parquet][Python] Add test case showing dictionary-encoded subfields in nested type
* [ARROW-6113](https://issues.apache.org/jira/browse/ARROW-6113) - [Java] Support vector deduplicate function
* [ARROW-6115](https://issues.apache.org/jira/browse/ARROW-6115) - [Python] support LargeList, LargeString, LargeBinary in conversion to pandas
* [ARROW-6118](https://issues.apache.org/jira/browse/ARROW-6118) - [Java] Replace google Preconditions with Arrow Preconditions
* [ARROW-6121](https://issues.apache.org/jira/browse/ARROW-6121) - [Tools] Improve merge tool cli ergonomic
* [ARROW-6125](https://issues.apache.org/jira/browse/ARROW-6125) - [Python] Remove any APIs deprecated prior to 0.14.x
* [ARROW-6127](https://issues.apache.org/jira/browse/ARROW-6127) - [Website] Add favicons and meta tags
* [ARROW-6128](https://issues.apache.org/jira/browse/ARROW-6128) - [C++] Can't build with g++ 8.3.0 by class-memaccess warning
* [ARROW-6130](https://issues.apache.org/jira/browse/ARROW-6130) - [Release] Use 0.15.0 as the next release
* [ARROW-6134](https://issues.apache.org/jira/browse/ARROW-6134) - [C++][Gandiva] Add concat function in Gandiva
* [ARROW-6137](https://issues.apache.org/jira/browse/ARROW-6137) - [C++][Gandiva] Change output format of castVARCHAR(timestamp) in Gandiva
* [ARROW-6137](https://issues.apache.org/jira/browse/ARROW-6137) - [C++][Gandiva] Change output format of castVARCHAR(timestamp) in Gandiva
* [ARROW-6138](https://issues.apache.org/jira/browse/ARROW-6138) - [C++] Add a basic (single RecordBatch) implementation of Dataset
* [ARROW-6139](https://issues.apache.org/jira/browse/ARROW-6139) - [Documentation][R] Build R docs (pkgdown) site and add to arrow-site
* [ARROW-6141](https://issues.apache.org/jira/browse/ARROW-6141) - [C++] Enable memory-mapping a file region that is offset from the beginning of the file
* [ARROW-6142](https://issues.apache.org/jira/browse/ARROW-6142) - [R] Install instructions on linux could be clearer
* [ARROW-6143](https://issues.apache.org/jira/browse/ARROW-6143) - [Java] Unify the copyFrom and copyFromSafe methods for all vectors
* [ARROW-6144](https://issues.apache.org/jira/browse/ARROW-6144) - [C++][Gandiva] Implement random function in Gandiva
* [ARROW-6155](https://issues.apache.org/jira/browse/ARROW-6155) - [Java] Extract a super interface for vectors whose elements reside in continuous memory segments
* [ARROW-6156](https://issues.apache.org/jira/browse/ARROW-6156) - [Java] Support compare semantics for ArrowBufPointer
* [ARROW-6161](https://issues.apache.org/jira/browse/ARROW-6161) - [C++] Implements dataset::ParquetFile and associated Scan structures
* [ARROW-6162](https://issues.apache.org/jira/browse/ARROW-6162) - [C++][Gandiva] Do not truncate string in castVARCHAR\_varchar when out\_len parameter is zero
* [ARROW-6164](https://issues.apache.org/jira/browse/ARROW-6164) - [Docs][Format] Document project versioning schema and forward/backward compatibility policies
* [ARROW-6172](https://issues.apache.org/jira/browse/ARROW-6172) - [Java] Provide benchmarks to set IntVector with different methods
* [ARROW-6177](https://issues.apache.org/jira/browse/ARROW-6177) - [C++] Add Array::Validate()
* [ARROW-6180](https://issues.apache.org/jira/browse/ARROW-6180) - [C++] Create InputStream that is an isolated reader of a segment of a RandomAccessFile
* [ARROW-6181](https://issues.apache.org/jira/browse/ARROW-6181) - [R] Only allow R package to install without libarrow on linux
* [ARROW-6183](https://issues.apache.org/jira/browse/ARROW-6183) - [R] Document that you don't have to use tidyselect if you don't want
* [ARROW-6185](https://issues.apache.org/jira/browse/ARROW-6185) - [Java] Provide hash table based dictionary builder
* [ARROW-6187](https://issues.apache.org/jira/browse/ARROW-6187) - [C++] fallback to storage type when writing ExtensionType to Parquet
* [ARROW-6188](https://issues.apache.org/jira/browse/ARROW-6188) - [GLib] Add garrow\_array\_is\_in()
* [ARROW-6192](https://issues.apache.org/jira/browse/ARROW-6192) - [GLib] Use the same SO version as C++
* [ARROW-6194](https://issues.apache.org/jira/browse/ARROW-6194) - [Java] Add non-static approach in DictionaryEncoder making it easy to extend and reuse
* [ARROW-6196](https://issues.apache.org/jira/browse/ARROW-6196) - [Ruby] Add support for building Arrow::TimeNNArray by .new
* [ARROW-6197](https://issues.apache.org/jira/browse/ARROW-6197) - [GLib] Add garrow\_decimal128\_rescale()
* [ARROW-6199](https://issues.apache.org/jira/browse/ARROW-6199) - [Java] Avro adapter avoid potential resource leak.
* [ARROW-6203](https://issues.apache.org/jira/browse/ARROW-6203) - [GLib] Add garrow\_array\_sort\_to\_indices()
* [ARROW-6204](https://issues.apache.org/jira/browse/ARROW-6204) - [GLib] Add garrow\_array\_is\_in\_chunked\_array()
* [ARROW-6206](https://issues.apache.org/jira/browse/ARROW-6206) - [Java][Docs] Document environment variables/java properties
* [ARROW-6209](https://issues.apache.org/jira/browse/ARROW-6209) - [Java] Extract set null method to the base class for fixed width vectors
* [ARROW-6212](https://issues.apache.org/jira/browse/ARROW-6212) - [Java] Support vector rank operation
* [ARROW-6216](https://issues.apache.org/jira/browse/ARROW-6216) - [C++] Allow user to select the compression level
* [ARROW-6217](https://issues.apache.org/jira/browse/ARROW-6217) - [Website] Remove needless \_site/ directory
* [ARROW-6219](https://issues.apache.org/jira/browse/ARROW-6219) - [Java] Add API for JDBC adapter that can convert less then the full result set at a time.
* [ARROW-6220](https://issues.apache.org/jira/browse/ARROW-6220) - [Java] Add API to avro adapter to limit number of rows returned at a time.
* [ARROW-6225](https://issues.apache.org/jira/browse/ARROW-6225) - [Website] Update arrow-site/README and any other places to point website contributors in right direction
* [ARROW-6229](https://issues.apache.org/jira/browse/ARROW-6229) - [C++] Add a DataSource implementation which scans a directory
* [ARROW-6230](https://issues.apache.org/jira/browse/ARROW-6230) - [R] Reading in Parquet files are 20x slower than reading fst files in R
* [ARROW-6231](https://issues.apache.org/jira/browse/ARROW-6231) - [C++][Python] Consider assigning default column names when reading CSV file and header\_rows=0
* [ARROW-6232](https://issues.apache.org/jira/browse/ARROW-6232) - [C++] Rename Argsort kernel to SortToIndices
* [ARROW-6237](https://issues.apache.org/jira/browse/ARROW-6237) - [R] Add option to set CXXFLAGS when compiling R package with $ARROW\_R\_CXXFLAGS
* [ARROW-6238](https://issues.apache.org/jira/browse/ARROW-6238) - [C++] Implement SimpleDataSource/SimpleDataFragment
* [ARROW-6240](https://issues.apache.org/jira/browse/ARROW-6240) - [Ruby] Arrow::Decimal128Array returns BigDecimal
* [ARROW-6242](https://issues.apache.org/jira/browse/ARROW-6242) - [C++] Implements basic Dataset/Scanner/ScannerBuilder
* [ARROW-6243](https://issues.apache.org/jira/browse/ARROW-6243) - [C++] Implement basic Filter expression classes
* [ARROW-6244](https://issues.apache.org/jira/browse/ARROW-6244) - [C++] Implement Partition DataSource
* [ARROW-6246](https://issues.apache.org/jira/browse/ARROW-6246) - [Website] Add link to R documentation site
* [ARROW-6247](https://issues.apache.org/jira/browse/ARROW-6247) - [Java] Provide a common interface for float4 and float8 vectors
* [ARROW-6249](https://issues.apache.org/jira/browse/ARROW-6249) - [Java] Remove useless class ByteArrayWrapper
* [ARROW-6250](https://issues.apache.org/jira/browse/ARROW-6250) - [Java] Implement ApproxEqualsVisitor comparing approx for floating point
* [ARROW-6252](https://issues.apache.org/jira/browse/ARROW-6252) - [Python] Add pyarrow.Array.diff method that exposes arrow::Diff
* [ARROW-6253](https://issues.apache.org/jira/browse/ARROW-6253) - [Python] Expose "enable\_buffered\_stream" option from parquet::ReaderProperties in pyarrow.parquet.read\_table
* [ARROW-6258](https://issues.apache.org/jira/browse/ARROW-6258) - [R] Add macOS build scripts
* [ARROW-6260](https://issues.apache.org/jira/browse/ARROW-6260) - [Website] Use deploy key on Travis to build and push to asf-site
* [ARROW-6262](https://issues.apache.org/jira/browse/ARROW-6262) - [Developer] Show JIRA issue before merging
* [ARROW-6264](https://issues.apache.org/jira/browse/ARROW-6264) - [Java] There is no need to consider byte order in ArrowBufHasher
* [ARROW-6265](https://issues.apache.org/jira/browse/ARROW-6265) - [Java] Avro adapter implement Array/Map/Fixed type
* [ARROW-6267](https://issues.apache.org/jira/browse/ARROW-6267) - [Ruby] Add Arrow::Time for Arrow::Time{32,64}DataType value
* [ARROW-6271](https://issues.apache.org/jira/browse/ARROW-6271) - [Rust] [DataFusion] Add example for running SQL against Parquet
* [ARROW-6272](https://issues.apache.org/jira/browse/ARROW-6272) - [Rust] [DataFusion] Add register\_parquet convenience method to ExecutionContext
* [ARROW-6278](https://issues.apache.org/jira/browse/ARROW-6278) - [R] Read parquet files from raw vector
* [ARROW-6279](https://issues.apache.org/jira/browse/ARROW-6279) - [Python] Add Table.slice method or allow slices in \_\_getitem\_\_
* [ARROW-6284](https://issues.apache.org/jira/browse/ARROW-6284) - [C++] Allow references in std::tuple when converting tuple to arrow array
* [ARROW-6287](https://issues.apache.org/jira/browse/ARROW-6287) - [Rust] [DataFusion] Refactor TableProvider to return thread-safe BatchIterator
* [ARROW-6288](https://issues.apache.org/jira/browse/ARROW-6288) - [Java] Implement TypeEqualsVisitor comparing vector type equals considering names and metadata
* [ARROW-6289](https://issues.apache.org/jira/browse/ARROW-6289) - [Java] Add empty() in UnionVector to create instance
* [ARROW-6292](https://issues.apache.org/jira/browse/ARROW-6292) - [C++] Add an option to build with mimalloc
* [ARROW-6294](https://issues.apache.org/jira/browse/ARROW-6294) - [C++] Use hyphen for plasma-store-server executable
* [ARROW-6295](https://issues.apache.org/jira/browse/ARROW-6295) - [Rust][DataFusion] ExecutionError Cannot compare Float32 with Float64
* [ARROW-6296](https://issues.apache.org/jira/browse/ARROW-6296) - [Java] Cleanup JDBC interfaces and eliminate one memcopy for binary/varchar fields
* [ARROW-6297](https://issues.apache.org/jira/browse/ARROW-6297) - [Java] Compare ArrowBufPointers by unsinged integers
* [ARROW-6300](https://issues.apache.org/jira/browse/ARROW-6300) - [C++] Add io::OutputStream::Abort()
* [ARROW-6303](https://issues.apache.org/jira/browse/ARROW-6303) - [Rust] Add a feature to disable SIMD
* [ARROW-6304](https://issues.apache.org/jira/browse/ARROW-6304) - [Java] Add description to each maven artifact
* [ARROW-6306](https://issues.apache.org/jira/browse/ARROW-6306) - [Java] Support stable sort by stable comparators
* [ARROW-6310](https://issues.apache.org/jira/browse/ARROW-6310) - [C++] Write 64-bit integers as strings in JSON integration test files
* [ARROW-6311](https://issues.apache.org/jira/browse/ARROW-6311) - [Java] Make ApproxEqualsVisitor accept DiffFunction to make it more flexible
* [ARROW-6313](https://issues.apache.org/jira/browse/ARROW-6313) - [Format] Tracking for ensuring flatbuffer serialized values are aligned in stream/files.
* [ARROW-6314](https://issues.apache.org/jira/browse/ARROW-6314) - [C++] Implement changes to ensure flatbuffer alignment.
* [ARROW-6314](https://issues.apache.org/jira/browse/ARROW-6314) - [C++] Implement changes to ensure flatbuffer alignment.
* [ARROW-6315](https://issues.apache.org/jira/browse/ARROW-6315) - [Java] Make change to ensure flatbuffer reads are aligned
* [ARROW-6316](https://issues.apache.org/jira/browse/ARROW-6316) - [Go]  Make change to ensure flatbuffer reads are aligned
* [ARROW-6317](https://issues.apache.org/jira/browse/ARROW-6317) - [JS] Implement changes to ensure flatbuffer alignment
* [ARROW-6318](https://issues.apache.org/jira/browse/ARROW-6318) - [Integration] Update integration test to use generated binaries to ensure backwards compatibility
* [ARROW-6319](https://issues.apache.org/jira/browse/ARROW-6319) - [C++] Extract the core of NumericTensor<T\>::Value as Tensor::Value<T\>
* [ARROW-6326](https://issues.apache.org/jira/browse/ARROW-6326) - [C++] Nullable fields when converting std::tuple to Table
* [ARROW-6328](https://issues.apache.org/jira/browse/ARROW-6328) - Click.option-s should have help text
* [ARROW-6329](https://issues.apache.org/jira/browse/ARROW-6329) - [Format] Add 4-byte "stream continuation" to IPC message format to align Flatbuffers
* [ARROW-6331](https://issues.apache.org/jira/browse/ARROW-6331) - [Java] Incorporate ErrorProne into the java build
* [ARROW-6334](https://issues.apache.org/jira/browse/ARROW-6334) - [Java] Improve the dictionary builder API to return the position of the value in the dictionary
* [ARROW-6335](https://issues.apache.org/jira/browse/ARROW-6335) - [Java] Improve the performance of DictionaryHashTable
* [ARROW-6336](https://issues.apache.org/jira/browse/ARROW-6336) - [Python] Clarify pyarrow.serialize/deserialize docstrings viz-a-viz relationship with Arrow IPC protocol
* [ARROW-6337](https://issues.apache.org/jira/browse/ARROW-6337) - [R] as\_tibble in R API is a misnomer
* [ARROW-6338](https://issues.apache.org/jira/browse/ARROW-6338) - [R] Type function names don't match type names
* [ARROW-6342](https://issues.apache.org/jira/browse/ARROW-6342) - [Python] Add pyarrow.record\_batch factory function with same basic API / semantics as pyarrow.table
* [ARROW-6346](https://issues.apache.org/jira/browse/ARROW-6346) - [GLib] Add garrow\_array\_view()
* [ARROW-6347](https://issues.apache.org/jira/browse/ARROW-6347) - [GLib] Add garrow\_array\_diff\_unified()
* [ARROW-6350](https://issues.apache.org/jira/browse/ARROW-6350) - [Ruby] Remove Arrow::Struct and use Hash instead
* [ARROW-6351](https://issues.apache.org/jira/browse/ARROW-6351) - [Ruby] Improve Arrow\#values performance
* [ARROW-6353](https://issues.apache.org/jira/browse/ARROW-6353) - [Python] Allow user to select compression level in pyarrow.parquet.write\_table
* [ARROW-6355](https://issues.apache.org/jira/browse/ARROW-6355) - [Java] Make range equal visitor reusable
* [ARROW-6356](https://issues.apache.org/jira/browse/ARROW-6356) - [Java] Avro adapter implement Enum type and nested Record type
* [ARROW-6357](https://issues.apache.org/jira/browse/ARROW-6357) - [C++] S3: allow for background writes
* [ARROW-6358](https://issues.apache.org/jira/browse/ARROW-6358) - [C++] FileSystem::DeleteDir should make it optional to delete the directory itself
* [ARROW-6360](https://issues.apache.org/jira/browse/ARROW-6360) - [R] Update support for compression
* [ARROW-6362](https://issues.apache.org/jira/browse/ARROW-6362) - [C++] S3: more flexible credential options
* [ARROW-6365](https://issues.apache.org/jira/browse/ARROW-6365) - [R] Should be able to coerce numeric to integer with schema
* [ARROW-6366](https://issues.apache.org/jira/browse/ARROW-6366) - [Java] Make field vectors final explicitly
* [ARROW-6368](https://issues.apache.org/jira/browse/ARROW-6368) - [C++] Add RecordBatch projection functionality
* [ARROW-6373](https://issues.apache.org/jira/browse/ARROW-6373) - [C++] Make FixedWidthBinaryBuilder consistent with other primitive fixed width builders
* [ARROW-6375](https://issues.apache.org/jira/browse/ARROW-6375) - [C++] Extend ConversionTraits to allow efficiently appending list values in STL API
* [ARROW-6379](https://issues.apache.org/jira/browse/ARROW-6379) - [C++] Do not append any buffers when serializing NullType for IPC
* [ARROW-6381](https://issues.apache.org/jira/browse/ARROW-6381) - [C++] BufferOutputStream::Write is slow for many small writes
* [ARROW-6383](https://issues.apache.org/jira/browse/ARROW-6383) - [Java] report outstanding child allocators on parent allocator close
* [ARROW-6384](https://issues.apache.org/jira/browse/ARROW-6384) - [C++] Bump dependencies
* [ARROW-6385](https://issues.apache.org/jira/browse/ARROW-6385) - [C++] Investigate xxh3
* [ARROW-6391](https://issues.apache.org/jira/browse/ARROW-6391) - [Python][Flight] Add built-in methods on FlightServerBase to start server and wait for it to be available
* [ARROW-6397](https://issues.apache.org/jira/browse/ARROW-6397) - [C++][CI] Fix S3 minio failure
* [ARROW-6401](https://issues.apache.org/jira/browse/ARROW-6401) - [Java] Implement dictionary-encoded subfields for Struct type
* [ARROW-6402](https://issues.apache.org/jira/browse/ARROW-6402) - [C++] Suppress sign-compare warning with g++ 9.2.1
* [ARROW-6403](https://issues.apache.org/jira/browse/ARROW-6403) - [Python] Expose FileReader::ReadRowGroups() to Python
* [ARROW-6408](https://issues.apache.org/jira/browse/ARROW-6408) - [Rust] Use "if cfg!" pattern in SIMD kernel implementations
* [ARROW-6413](https://issues.apache.org/jira/browse/ARROW-6413) - [R] Support autogenerating column names
* [ARROW-6415](https://issues.apache.org/jira/browse/ARROW-6415) - [R] Remove usage of R CMD config CXXCPP
* [ARROW-6416](https://issues.apache.org/jira/browse/ARROW-6416) - [Python] Confusing API & documentation regarding chunksizes
* [ARROW-6417](https://issues.apache.org/jira/browse/ARROW-6417) - [C++][Parquet] Non-dictionary BinaryArray reads from Parquet format have slowed down since 0.11.x
* [ARROW-6419](https://issues.apache.org/jira/browse/ARROW-6419) - [Website] Blog post about Parquet dictionary performance work coming in 0.15.x release
* [ARROW-6422](https://issues.apache.org/jira/browse/ARROW-6422) - [Gandiva] Fix double-conversion linker issue
* [ARROW-6426](https://issues.apache.org/jira/browse/ARROW-6426) - [FlightRPC] Expose gRPC configuration knobs in Flight
* [ARROW-6427](https://issues.apache.org/jira/browse/ARROW-6427) - [GLib] Add support for column names autogeneration CSV read option
* [ARROW-6438](https://issues.apache.org/jira/browse/ARROW-6438) - [R] Add bindings for filesystem API
* [ARROW-6447](https://issues.apache.org/jira/browse/ARROW-6447) - [C++] Builds with ARROW\_JEMALLOC=ON wait until jemalloc\_ep is complete before building any libarrow .cc files
* [ARROW-6450](https://issues.apache.org/jira/browse/ARROW-6450) - [C++] Use 2x reallocation strategy in arrow::BufferBuilder instead of 1.5x
* [ARROW-6451](https://issues.apache.org/jira/browse/ARROW-6451) - [Format] Add clarifications to Columnar.rst about the contents of "null" slots in Varbinary or List arrays
* [ARROW-6453](https://issues.apache.org/jira/browse/ARROW-6453) - [C++] More informative error messages from S3
* [ARROW-6454](https://issues.apache.org/jira/browse/ARROW-6454) - [Developer] Add LLVM license to LICENSE.txt due to binary redistribution in packages
* [ARROW-6458](https://issues.apache.org/jira/browse/ARROW-6458) - [Java] Remove value boxing/unboxing for ApproxEqualsVisitor
* [ARROW-6460](https://issues.apache.org/jira/browse/ARROW-6460) - [Java] Add benchmark and large fake data UT for avro adapter
* [ARROW-6462](https://issues.apache.org/jira/browse/ARROW-6462) - [C++] Can't build with bundled double-conversion on CentOS 6 x86\_64
* [ARROW-6465](https://issues.apache.org/jira/browse/ARROW-6465) - [Python] Improve Windows build instructions
* [ARROW-6474](https://issues.apache.org/jira/browse/ARROW-6474) - [Python] Provide mechanism for python to write out old format
* [ARROW-6475](https://issues.apache.org/jira/browse/ARROW-6475) - [C++] Don't try to dictionary encode dictionary arrays
* [ARROW-6477](https://issues.apache.org/jira/browse/ARROW-6477) - [Packaging][Crossbow] Use Azure Pipelines to build linux packages
* [ARROW-6480](https://issues.apache.org/jira/browse/ARROW-6480) - [Developer] Add command to generate and send e-mail report for a Crossbow run
* [ARROW-6484](https://issues.apache.org/jira/browse/ARROW-6484) - [Java] Enable create indexType for DictionaryEncoding according to dictionary value count
* [ARROW-6487](https://issues.apache.org/jira/browse/ARROW-6487) - [Rust] [DataFusion] Create test utils module
* [ARROW-6489](https://issues.apache.org/jira/browse/ARROW-6489) - [Developer][Documentation] Fix merge script and readme
* [ARROW-6490](https://issues.apache.org/jira/browse/ARROW-6490) - [Java] log error for leak in allocator close
* [ARROW-6491](https://issues.apache.org/jira/browse/ARROW-6491) - [Java] fix master build failure caused by ErrorProne
* [ARROW-6494](https://issues.apache.org/jira/browse/ARROW-6494) - [C++][Dataset] Implement basic PartitionScheme
* [ARROW-6504](https://issues.apache.org/jira/browse/ARROW-6504) - [Python][Packaging] Add mimalloc to conda packages for better performance
* [ARROW-6505](https://issues.apache.org/jira/browse/ARROW-6505) - [Website] Add new committers
* [ARROW-6518](https://issues.apache.org/jira/browse/ARROW-6518) - [Packaging][Python] Flight failing in OSX Python wheel builds
* [ARROW-6519](https://issues.apache.org/jira/browse/ARROW-6519) - [Java] Use IPC continuation token to mark EOS
* [ARROW-6524](https://issues.apache.org/jira/browse/ARROW-6524) - [Developer][Packaging] Nightly build report's subject should contain Arrow
* [ARROW-6525](https://issues.apache.org/jira/browse/ARROW-6525) - [C++] CloseFromDestructor() should perhaps not crash
* [ARROW-6526](https://issues.apache.org/jira/browse/ARROW-6526) - [C++] Poison data in PoolBuffer destructor
* [ARROW-6527](https://issues.apache.org/jira/browse/ARROW-6527) - [C++] Add OutputStream::Write() variant taking an owned buffer
* [ARROW-6531](https://issues.apache.org/jira/browse/ARROW-6531) - [Python] Add detach() method to buffered streams
* [ARROW-6532](https://issues.apache.org/jira/browse/ARROW-6532) - [R] Write parquet files with compression
* [ARROW-6533](https://issues.apache.org/jira/browse/ARROW-6533) - [R] Compression codec should take a "level"
* [ARROW-6534](https://issues.apache.org/jira/browse/ARROW-6534) - [Java] Fix typos and spelling
* [ARROW-6539](https://issues.apache.org/jira/browse/ARROW-6539) - [R] Provide mechanism to write out old format
* [ARROW-6540](https://issues.apache.org/jira/browse/ARROW-6540) - [R] Add Validate() methods
* [ARROW-6541](https://issues.apache.org/jira/browse/ARROW-6541) - [Format][C++] Use two-part EOS and amend Format documentation
* [ARROW-6542](https://issues.apache.org/jira/browse/ARROW-6542) - [R] Add View() method to array types
* [ARROW-6544](https://issues.apache.org/jira/browse/ARROW-6544) - [R] Documentation/polishing for 0.15 release
* [ARROW-6545](https://issues.apache.org/jira/browse/ARROW-6545) - [Go] Update Go IPC writer to use two-part EOS per mailing list discussion
* [ARROW-6546](https://issues.apache.org/jira/browse/ARROW-6546) - [C++] Add missing FlatBuffers source dependency
* [ARROW-6549](https://issues.apache.org/jira/browse/ARROW-6549) - [C++] Switch back to latest jemalloc 5.x
* [ARROW-6556](https://issues.apache.org/jira/browse/ARROW-6556) - [Python] Prepare for pandas release without SparseDataFrame
* [ARROW-6556](https://issues.apache.org/jira/browse/ARROW-6556) - [Python] Prepare for pandas release without SparseDataFrame
* [ARROW-6557](https://issues.apache.org/jira/browse/ARROW-6557) - [Python] Always return pandas.Series from Array/ChunkedArray.to\_pandas, propagate field names to Series from RecordBatch, Table
* [ARROW-6558](https://issues.apache.org/jira/browse/ARROW-6558) - [C++] Refactor Iterator to a type erased handle
* [ARROW-6559](https://issues.apache.org/jira/browse/ARROW-6559) - [Developer][C++] Add "archery" option to specify system toolchain for C++ builds
* [ARROW-6563](https://issues.apache.org/jira/browse/ARROW-6563) - [Rust] [DataFusion] Create "merge" execution plan
* [ARROW-6569](https://issues.apache.org/jira/browse/ARROW-6569) - [Website] Add support for auto deployment by GitHub Actions
* [ARROW-6570](https://issues.apache.org/jira/browse/ARROW-6570) - [Python] Use MemoryPool to allocate memory for NumPy arrays in to\_pandas calls
* [ARROW-6580](https://issues.apache.org/jira/browse/ARROW-6580) - [Java] Support comparison for unsigned integers
* [ARROW-6584](https://issues.apache.org/jira/browse/ARROW-6584) - [Python][Wheel] Bundle zlib again with the windows wheels
* [ARROW-6588](https://issues.apache.org/jira/browse/ARROW-6588) - [C++] Suppress class-memaccess warning with g++ 9.2.1
* [ARROW-6589](https://issues.apache.org/jira/browse/ARROW-6589) - [C++] Support BinaryType in MakeArrayOfNull
* [ARROW-6590](https://issues.apache.org/jira/browse/ARROW-6590) - [C++] Do not require ARROW\_JSON=ON when ARROW\_IPC=ON
* [ARROW-6591](https://issues.apache.org/jira/browse/ARROW-6591) - [R] Ignore .Rhistory files in source control
* [ARROW-6599](https://issues.apache.org/jira/browse/ARROW-6599) - [Rust] [DataFusion] Implement SUM aggregate expression
* [ARROW-6601](https://issues.apache.org/jira/browse/ARROW-6601) - [Java] Improve JDBC adapter performance & add benchmark
* [ARROW-6605](https://issues.apache.org/jira/browse/ARROW-6605) - [C++] Add recursion depth control to fs::Selector
* [ARROW-6606](https://issues.apache.org/jira/browse/ARROW-6606) - [C++] Construct tree structure from std::vector<fs::FileStats\>
* [ARROW-6609](https://issues.apache.org/jira/browse/ARROW-6609) - [C++] Add minimal build Dockerfile example
* [ARROW-6613](https://issues.apache.org/jira/browse/ARROW-6613) - [C++] Remove dependency on boost::filesystem
* [ARROW-6614](https://issues.apache.org/jira/browse/ARROW-6614) - [C++][Dataset] Implement FileSystemDataSourceDiscovery
* [ARROW-6616](https://issues.apache.org/jira/browse/ARROW-6616) - [Website] Release announcement blog post for 0.15
* [ARROW-6621](https://issues.apache.org/jira/browse/ARROW-6621) - [Rust][DataFusion] Examples for DataFusion are not executed in CI
* [ARROW-6629](https://issues.apache.org/jira/browse/ARROW-6629) - [Doc][C++] Document the FileSystem API
* [ARROW-6630](https://issues.apache.org/jira/browse/ARROW-6630) - [Doc][C++] Document the file readers (CSV, JSON, Parquet, etc.)
* [ARROW-6644](https://issues.apache.org/jira/browse/ARROW-6644) - [JS] Amend NullType IPC protocol to append no buffers
* [ARROW-6647](https://issues.apache.org/jira/browse/ARROW-6647) - [C++] Can't build with g++ 4.8.5 on CentOS 7 by member initializer for shared\_ptr
* [ARROW-6648](https://issues.apache.org/jira/browse/ARROW-6648) - [Go] Expose the bitutil package
* [ARROW-6649](https://issues.apache.org/jira/browse/ARROW-6649) - [R] print() methods for Table, RecordBatch, etc.
* [ARROW-6653](https://issues.apache.org/jira/browse/ARROW-6653) - [Developer] Add support for auto JIRA link on pull request
* [ARROW-6655](https://issues.apache.org/jira/browse/ARROW-6655) - [Python] Filesystem bindings for S3
* [ARROW-6664](https://issues.apache.org/jira/browse/ARROW-6664) - [C++] Add option to build without SSE4.2
* [ARROW-6665](https://issues.apache.org/jira/browse/ARROW-6665) - [Rust] [DataFusion] Implement numeric literal expressions
* [ARROW-6667](https://issues.apache.org/jira/browse/ARROW-6667) - [Python] Avoid Reference Cycles in pyarrow.parquet
* [ARROW-6668](https://issues.apache.org/jira/browse/ARROW-6668) - [Rust] [DataFusion] Implement CAST expression
* [ARROW-6669](https://issues.apache.org/jira/browse/ARROW-6669) - [Rust] [DataFusion] Implement physical expression for binary expressions
* [ARROW-6675](https://issues.apache.org/jira/browse/ARROW-6675) - [JS] Add scanReverse function to dataFrame and filteredDataframe
* [ARROW-6683](https://issues.apache.org/jira/browse/ARROW-6683) - [Python] Add unit tests that validate cross-compatibility with pyarrow.parquet when fastparquet is installed
* [ARROW-6725](https://issues.apache.org/jira/browse/ARROW-6725) - [CI] Disable 3rdparty fuzzit nightly builds
* [ARROW-6735](https://issues.apache.org/jira/browse/ARROW-6735) - [C++] Suppress sign-compare warning with g++ 9.2.1
* [ARROW-6752](https://issues.apache.org/jira/browse/ARROW-6752) - [Go] implement Stringer for Null array
* [ARROW-6755](https://issues.apache.org/jira/browse/ARROW-6755) - [Release] Improvements to Windows release verification script
* [ARROW-6771](https://issues.apache.org/jira/browse/ARROW-6771) - [Packaging][Python] Missing pytest dependency from conda and wheel builds
* [PARQUET-1468](https://issues.apache.org/jira/browse/PARQUET-1468) - [C++] Consolidate RecordReader, ColumnReader code paths


## Bug Fixes

* [ARROW-1184](https://issues.apache.org/jira/browse/ARROW-1184) - [Java] Dictionary.equals is not working correctly
* [ARROW-2041](https://issues.apache.org/jira/browse/ARROW-2041) - [Python] pyarrow.serialize has high overhead for list of NumPy arrays
* [ARROW-2248](https://issues.apache.org/jira/browse/ARROW-2248) - [Python] Nightly or on-demand HDFS test builds
* [ARROW-2317](https://issues.apache.org/jira/browse/ARROW-2317) - [Python] fix C linkage warning
* [ARROW-2490](https://issues.apache.org/jira/browse/ARROW-2490) - [C++] input stream locking inconsistent
* [ARROW-3176](https://issues.apache.org/jira/browse/ARROW-3176) - [Python] Overflow in Date32 column conversion to pandas
* [ARROW-3203](https://issues.apache.org/jira/browse/ARROW-3203) - [C++] Build error on Debian Buster
* [ARROW-3651](https://issues.apache.org/jira/browse/ARROW-3651) - [Python] Datetimes from non-DateTimeIndex cannot be deserialized
* [ARROW-3652](https://issues.apache.org/jira/browse/ARROW-3652) - [Python] CategoricalIndex is lost after reading back
* [ARROW-3762](https://issues.apache.org/jira/browse/ARROW-3762) - [C++] Parquet arrow::Table reads error when overflowing capacity of BinaryArray
* [ARROW-3933](https://issues.apache.org/jira/browse/ARROW-3933) - [Python] Segfault reading Parquet files from GNOMAD
* [ARROW-4187](https://issues.apache.org/jira/browse/ARROW-4187) - [C++] file-benchmark uses <poll.h\>
* [ARROW-4746](https://issues.apache.org/jira/browse/ARROW-4746) - [C++/Python] PyDataTime\_Date wrongly casted to PyDataTime\_DateTime
* [ARROW-4836](https://issues.apache.org/jira/browse/ARROW-4836) - [Python] "Cannot tell() a compressed stream" when using RecordBatchStreamWriter
* [ARROW-4848](https://issues.apache.org/jira/browse/ARROW-4848) - [C++] Static libparquet not compiled with -DARROW\_STATIC on Windows
* [ARROW-4880](https://issues.apache.org/jira/browse/ARROW-4880) - [Python] python/asv-build.sh is probably broken after CMake refactor
* [ARROW-4883](https://issues.apache.org/jira/browse/ARROW-4883) - [Python] read\_csv() returns garbage if given file object in text mode
* [ARROW-5028](https://issues.apache.org/jira/browse/ARROW-5028) - [Python][C++] Creating list<string\> with pyarrow.array can overflow child builder
* [ARROW-5072](https://issues.apache.org/jira/browse/ARROW-5072) - [Python] write\_table fails silently on S3 errors
* [ARROW-5085](https://issues.apache.org/jira/browse/ARROW-5085) - [Python/C++] Conversion of dict encoded null column fails in parquet writing when using RowGroups
* [ARROW-5086](https://issues.apache.org/jira/browse/ARROW-5086) - [Python] Space leak in  ParquetFile.read\_row\_group()
* [ARROW-5089](https://issues.apache.org/jira/browse/ARROW-5089) - [C++/Python] Writing dictionary encoded columns to parquet is extremely slow when using chunk size
* [ARROW-5103](https://issues.apache.org/jira/browse/ARROW-5103) - [Python] Segfault when using chunked\_array.to\_pandas on array different types (edge case)
* [ARROW-5125](https://issues.apache.org/jira/browse/ARROW-5125) - [Python] Cannot roundtrip extreme dates through pyarrow
* [ARROW-5161](https://issues.apache.org/jira/browse/ARROW-5161) - [Python] Cannot convert struct type from Pandas object column
* [ARROW-5220](https://issues.apache.org/jira/browse/ARROW-5220) - [Python] index / unknown columns in specified schema in Table.from\_pandas
* [ARROW-5220](https://issues.apache.org/jira/browse/ARROW-5220) - [Python] index / unknown columns in specified schema in Table.from\_pandas
* [ARROW-5292](https://issues.apache.org/jira/browse/ARROW-5292) - [C++] Static libraries are built on AppVeyor
* [ARROW-5300](https://issues.apache.org/jira/browse/ARROW-5300) - [C++] 0.13 FAILED to build with option -DARROW\_NO\_DEFAULT\_MEMORY\_POOL
* [ARROW-5374](https://issues.apache.org/jira/browse/ARROW-5374) - [Python] Misleading error message when calling pyarrow.read\_record\_batch on a complete IPC stream
* [ARROW-5414](https://issues.apache.org/jira/browse/ARROW-5414) - [C++] Using "Ninja" build system generator overrides default Release build type on Windows
* [ARROW-5450](https://issues.apache.org/jira/browse/ARROW-5450) - [Python] TimestampArray.to\_pylist() fails with OverflowError: Python int too large to convert to C long
* [ARROW-5471](https://issues.apache.org/jira/browse/ARROW-5471) - [C++][Gandiva]Array offset is ignored in Gandiva projector
* [ARROW-5522](https://issues.apache.org/jira/browse/ARROW-5522) - [Packaging][Documentation] Comments out of date in python/manylinux1/build\_arrow.sh
* [ARROW-5525](https://issues.apache.org/jira/browse/ARROW-5525) - [C++][CI] Enable continuous fuzzing
* [ARROW-5560](https://issues.apache.org/jira/browse/ARROW-5560) - [C++][Plasma] Cannot create Plasma object after OutOfMemory error
* [ARROW-5562](https://issues.apache.org/jira/browse/ARROW-5562) - [C++][Parquet] parquet writer does not handle negative zero correctly
* [ARROW-5630](https://issues.apache.org/jira/browse/ARROW-5630) - [Python][Parquet] Table of nested arrays doesn't round trip
* [ARROW-5638](https://issues.apache.org/jira/browse/ARROW-5638) - [C++] cmake fails to generate Xcode project when Gandiva JNI bindings are enabled
* [ARROW-5651](https://issues.apache.org/jira/browse/ARROW-5651) - [Python] Incorrect conversion from strided Numpy array when other type is specified
* [ARROW-5682](https://issues.apache.org/jira/browse/ARROW-5682) - [Python] from\_pandas conversion casts values to string inconsistently
* [ARROW-5731](https://issues.apache.org/jira/browse/ARROW-5731) - [CI] Turbodbc integration tests are failing
* [ARROW-5753](https://issues.apache.org/jira/browse/ARROW-5753) - [Rust] Fix test failure in CI code coverage
* [ARROW-5772](https://issues.apache.org/jira/browse/ARROW-5772) - [GLib][Plasma][CUDA] Plasma::Client\#refer\_object test is failed
* [ARROW-5775](https://issues.apache.org/jira/browse/ARROW-5775) - [C++] StructArray : cached boxed fields not thread-safe
* [ARROW-5776](https://issues.apache.org/jira/browse/ARROW-5776) - [Gandiva][Crossbow] Revert template to have commit ids.
* [ARROW-5790](https://issues.apache.org/jira/browse/ARROW-5790) - [Python] Passing zero-dim numpy array to pa.array causes segfault
* [ARROW-5817](https://issues.apache.org/jira/browse/ARROW-5817) - [Python] Use pytest marks for Flight test to avoid silently skipping unit tests due to import failures
* [ARROW-5823](https://issues.apache.org/jira/browse/ARROW-5823) - [Rust] CI scripts miss --all-targets cargo argument
* [ARROW-5824](https://issues.apache.org/jira/browse/ARROW-5824) - [Gandiva] [C++] Fix decimal null
* [ARROW-5836](https://issues.apache.org/jira/browse/ARROW-5836) - [Java][OSX] Flight tests are failing: address already in use
* [ARROW-5838](https://issues.apache.org/jira/browse/ARROW-5838) - [C++][Flight][OSX] Building 3rdparty grpc cannot find OpenSSL
* [ARROW-5848](https://issues.apache.org/jira/browse/ARROW-5848) - [C++] SO versioning schema after release 1.0.0
* [ARROW-5849](https://issues.apache.org/jira/browse/ARROW-5849) - [C++] Compiler warnings on mingw-w64
* [ARROW-5850](https://issues.apache.org/jira/browse/ARROW-5850) - [CI][R] R appveyor job is broken after release
* [ARROW-5851](https://issues.apache.org/jira/browse/ARROW-5851) - [C++] Compilation of reference benchmarks fails
* [ARROW-5856](https://issues.apache.org/jira/browse/ARROW-5856) - [Python] linking 3rd party cython modules against pyarrow fails since 0.14.0
* [ARROW-5860](https://issues.apache.org/jira/browse/ARROW-5860) - [Java] [Vector] Fix decimal byte setter
* [ARROW-5863](https://issues.apache.org/jira/browse/ARROW-5863) - [Python] Segmentation Fault via pytest-runner
* [ARROW-5868](https://issues.apache.org/jira/browse/ARROW-5868) - [Python] manylinux2010 wheels have shared library dependency on liblz4
* [ARROW-5870](https://issues.apache.org/jira/browse/ARROW-5870) - [C++] Development compile instructions need to include "make"
* [ARROW-5873](https://issues.apache.org/jira/browse/ARROW-5873) - [Python] Segmentation fault when comparing schema with None
* [ARROW-5874](https://issues.apache.org/jira/browse/ARROW-5874) - [Python] pyarrow 0.14.0 macOS wheels depend on shared libs under /usr/local/opt
* [ARROW-5878](https://issues.apache.org/jira/browse/ARROW-5878) - [Python][C++] Parquet reader not forward compatible for timestamps without timezone
* [ARROW-5884](https://issues.apache.org/jira/browse/ARROW-5884) - [Java] Fix the get method of StructVector
* [ARROW-5886](https://issues.apache.org/jira/browse/ARROW-5886) - [Python][Packaging] Manylinux1/2010 compliance issue with libz
* [ARROW-5887](https://issues.apache.org/jira/browse/ARROW-5887) - [C\#] ArrowStreamWriter writes FieldNodes in wrong order
* [ARROW-5889](https://issues.apache.org/jira/browse/ARROW-5889) - [Python][C++] Parquet backwards compat for timestamps without timezone broken
* [ARROW-5894](https://issues.apache.org/jira/browse/ARROW-5894) - [C++] libgandiva.so.14 is exporting libstdc++ symbols
* [ARROW-5899](https://issues.apache.org/jira/browse/ARROW-5899) - [Python][Packaging] Bundle uriparser.dll in windows wheels
* [ARROW-5910](https://issues.apache.org/jira/browse/ARROW-5910) - [Python] read\_tensor() fails on non-seekable streams
* [ARROW-5921](https://issues.apache.org/jira/browse/ARROW-5921) - [C++][Fuzzing] Missing nullptr checks in IPC
* [ARROW-5923](https://issues.apache.org/jira/browse/ARROW-5923) - [C++] Fix int96 comment
* [ARROW-5925](https://issues.apache.org/jira/browse/ARROW-5925) - [Gandiva][C++] cast decimal to int should round up
* [ARROW-5930](https://issues.apache.org/jira/browse/ARROW-5930) - [FlightRPC] [Python] Flight CI tests are failing
* [ARROW-5930](https://issues.apache.org/jira/browse/ARROW-5930) - [FlightRPC] [Python] Flight CI tests are failing
* [ARROW-5935](https://issues.apache.org/jira/browse/ARROW-5935) - [C++] ArrayBuilders with mutable type are not robustly supported
* [ARROW-5946](https://issues.apache.org/jira/browse/ARROW-5946) - [Rust] [DataFusion] Projection push down with aggregate producing incorrect results
* [ARROW-5952](https://issues.apache.org/jira/browse/ARROW-5952) - [Python] Segfault when reading empty table with category as pandas dataframe
* [ARROW-5959](https://issues.apache.org/jira/browse/ARROW-5959) - [C++][CI] Fuzzit does not know about branch + commit hash
* [ARROW-5960](https://issues.apache.org/jira/browse/ARROW-5960) - [C++] Boost dependencies are specified in wrong order
* [ARROW-5963](https://issues.apache.org/jira/browse/ARROW-5963) - [R] R Appveyor job does not test changes in the C++ library
* [ARROW-5964](https://issues.apache.org/jira/browse/ARROW-5964) - [C++][Gandiva] Cast double to decimal with rounding returns 0
* [ARROW-5965](https://issues.apache.org/jira/browse/ARROW-5965) - [Python] Regression: segfault when reading hive table with v0.14
* [ARROW-5966](https://issues.apache.org/jira/browse/ARROW-5966) - [Python] Capacity error when converting large UTF32 numpy array to arrow array
* [ARROW-5968](https://issues.apache.org/jira/browse/ARROW-5968) - [Java] Remove duplicate Preconditions check in JDBC adapter
* [ARROW-5969](https://issues.apache.org/jira/browse/ARROW-5969) - [CI] [R] Lint failures
* [ARROW-5973](https://issues.apache.org/jira/browse/ARROW-5973) - [Java] Variable width vectors' get methods should return null when the underlying data is null
* [ARROW-5978](https://issues.apache.org/jira/browse/ARROW-5978) - [FlightRPC] [Java] Integration test client doesn't close buffers
* [ARROW-5989](https://issues.apache.org/jira/browse/ARROW-5989) - [C++][Python] pyarrow.lib.ArrowIOError: Unable to load libjvm when using openjdk-8
* [ARROW-5990](https://issues.apache.org/jira/browse/ARROW-5990) - [Python] RowGroupMetaData.column misses bounds check
* [ARROW-5992](https://issues.apache.org/jira/browse/ARROW-5992) - [C++] Array::View fails for string/utf8 as binary
* [ARROW-5993](https://issues.apache.org/jira/browse/ARROW-5993) - [Python] Reading a dictionary column from Parquet results in disproportionate memory usage
* [ARROW-5996](https://issues.apache.org/jira/browse/ARROW-5996) - [Java] Avoid resource leak in flight service
* [ARROW-5999](https://issues.apache.org/jira/browse/ARROW-5999) - [C++] Required header files missing when built with -DARROW\_DATASET=OFF
* [ARROW-6002](https://issues.apache.org/jira/browse/ARROW-6002) - [C++][Gandiva] TestCastFunctions does not test int64 casting\`
* [ARROW-6004](https://issues.apache.org/jira/browse/ARROW-6004) - [C++] CSV reader ignore\_empty\_lines option doesn't handle empty lines
* [ARROW-6005](https://issues.apache.org/jira/browse/ARROW-6005) - [C++] parquet::arrow::FileReader::GetRecordBatchReader() does not behave as documented since ARROW-1012
* [ARROW-6006](https://issues.apache.org/jira/browse/ARROW-6006) - [C++] Empty IPC streams containing a dictionary are corrupt
* [ARROW-6012](https://issues.apache.org/jira/browse/ARROW-6012) - [C++] Fall back on known Apache mirror for Thrift downloads
* [ARROW-6015](https://issues.apache.org/jira/browse/ARROW-6015) - [Python] pyarrow wheel:  \`DLL load failed\` when importing on windows
* [ARROW-6016](https://issues.apache.org/jira/browse/ARROW-6016) - [Python] pyarrow get\_library\_dirs assertion error
* [ARROW-6029](https://issues.apache.org/jira/browse/ARROW-6029) - [R] Improve R docs on how to fix library version mismatch
* [ARROW-6032](https://issues.apache.org/jira/browse/ARROW-6032) - [C++] CountSetBits doesn't ensure 64-bit aligned accesses
* [ARROW-6038](https://issues.apache.org/jira/browse/ARROW-6038) - [Python] pyarrow.Table.from\_batches produces corrupted table if any of the batches were empty
* [ARROW-6040](https://issues.apache.org/jira/browse/ARROW-6040) - [Java] Dictionary entries are required in IPC streams even when empty
* [ARROW-6046](https://issues.apache.org/jira/browse/ARROW-6046) - [C++] Slice RecordBatch of String array with offset 0 returns whole batch
* [ARROW-6047](https://issues.apache.org/jira/browse/ARROW-6047) - [Rust] Rust nightly 1.38.0 builds failing
* [ARROW-6050](https://issues.apache.org/jira/browse/ARROW-6050) - [Java] Update out-of-date java/flight/README.md
* [ARROW-6054](https://issues.apache.org/jira/browse/ARROW-6054) - pyarrow.serialize should respect the value of structured dtype of numpy
* [ARROW-6058](https://issues.apache.org/jira/browse/ARROW-6058) - [Python][Parquet] Failure when reading Parquet file from S3 with s3fs
* [ARROW-6059](https://issues.apache.org/jira/browse/ARROW-6059) - [Python] Regression memory issue when calling pandas.read\_parquet
* [ARROW-6060](https://issues.apache.org/jira/browse/ARROW-6060) - [Python] too large memory cost using pyarrow.parquet.read\_table with use\_threads=True
* [ARROW-6061](https://issues.apache.org/jira/browse/ARROW-6061) - [C++] Cannot build libarrow without rapidjson
* [ARROW-6066](https://issues.apache.org/jira/browse/ARROW-6066) - [Website] Fix blog post author header
* [ARROW-6067](https://issues.apache.org/jira/browse/ARROW-6067) - [Python] Large memory test failures
* [ARROW-6068](https://issues.apache.org/jira/browse/ARROW-6068) - [Python] Hypothesis test failure, Add StructType::Make that accepts vector of fields
* [ARROW-6073](https://issues.apache.org/jira/browse/ARROW-6073) - [C++] Decimal128Builder is not reset in Finish()
* [ARROW-6082](https://issues.apache.org/jira/browse/ARROW-6082) - [Python] create pa.dictionary() type with non-integer indices type crashes
* [ARROW-6092](https://issues.apache.org/jira/browse/ARROW-6092) - [C++] Python 2.7: arrow\_python\_test failure
* [ARROW-6095](https://issues.apache.org/jira/browse/ARROW-6095) - [C++] Python subproject ignores ARROW\_TEST\_LINKAGE
* [ARROW-6108](https://issues.apache.org/jira/browse/ARROW-6108) - [C++] Appveyor Build\_Debug configuration is hanging in C++ unit tests
* [ARROW-6116](https://issues.apache.org/jira/browse/ARROW-6116) - [C++][Gandiva] Fix bug in TimedTestFilterAdd2
* [ARROW-6117](https://issues.apache.org/jira/browse/ARROW-6117) - [Java] Fix the set method of FixedSizeBinaryVector
* [ARROW-6119](https://issues.apache.org/jira/browse/ARROW-6119) - [Python] PyArrow wheel import fails on Windows Python 3.7
* [ARROW-6120](https://issues.apache.org/jira/browse/ARROW-6120) - [C++][Gandiva] including some headers causes decimal\_test to fail
* [ARROW-6126](https://issues.apache.org/jira/browse/ARROW-6126) - [C++] IPC stream reader handling of empty streams potentially not robust
* [ARROW-6132](https://issues.apache.org/jira/browse/ARROW-6132) - [Python] ListArray.from\_arrays does not check validity of input arrays
* [ARROW-6135](https://issues.apache.org/jira/browse/ARROW-6135) - [C++] KeyValueMetadata::Equals should not be order-sensitive
* [ARROW-6136](https://issues.apache.org/jira/browse/ARROW-6136) - [FlightRPC][Java] Don't double-close response stream
* [ARROW-6145](https://issues.apache.org/jira/browse/ARROW-6145) - [Java] UnionVector created by MinorType\#getNewVector could not keep field type info properly
* [ARROW-6148](https://issues.apache.org/jira/browse/ARROW-6148) - [C++][Packaging]  Improve aarch64 support
* [ARROW-6152](https://issues.apache.org/jira/browse/ARROW-6152) - [C++][Parquet] Write arrow::Array directly into parquet::TypedColumnWriter<T\>
* [ARROW-6153](https://issues.apache.org/jira/browse/ARROW-6153) - [R] Address parquet deprecation warning
* [ARROW-6158](https://issues.apache.org/jira/browse/ARROW-6158) - [Python] possible to create StructArray with type that conflicts with child array's types
* [ARROW-6159](https://issues.apache.org/jira/browse/ARROW-6159) - [C++] PrettyPrint of arrow::Schema missing identation for first line
* [ARROW-6160](https://issues.apache.org/jira/browse/ARROW-6160) - [Java] AbstractStructVector\#getPrimitiveVectors fails to work with complex child vectors
* [ARROW-6166](https://issues.apache.org/jira/browse/ARROW-6166) - [Go] Slice of slice causes index out of range panic
* [ARROW-6167](https://issues.apache.org/jira/browse/ARROW-6167) - [R] macOS binary R packages on CRAN don't have arrow\_available
* [ARROW-6168](https://issues.apache.org/jira/browse/ARROW-6168) - [C++] IWYU docker-compose job is broken
* [ARROW-6170](https://issues.apache.org/jira/browse/ARROW-6170) - [R] "docker-compose build r" is slow
* [ARROW-6171](https://issues.apache.org/jira/browse/ARROW-6171) - [R] "docker-compose run r" fails
* [ARROW-6174](https://issues.apache.org/jira/browse/ARROW-6174) - [C++] Validate chunks in ChunkedArray::Validate
* [ARROW-6175](https://issues.apache.org/jira/browse/ARROW-6175) - [Java] Fix MapVector\#getMinorType and extend AbstractContainerVector addOrGet complex vector API
* [ARROW-6178](https://issues.apache.org/jira/browse/ARROW-6178) - [Developer] Don't fail in merge script on bad primary author input in multi-author PRs
* [ARROW-6182](https://issues.apache.org/jira/browse/ARROW-6182) - [R] Add note to README about r-arrow conda installation
* [ARROW-6186](https://issues.apache.org/jira/browse/ARROW-6186) - [Packaging][C++] Plasma headers not included for ubuntu-xenial libplasma-dev debian package
* [ARROW-6190](https://issues.apache.org/jira/browse/ARROW-6190) - [C++] Define and declare functions regardless of NDEBUG
* [ARROW-6193](https://issues.apache.org/jira/browse/ARROW-6193) - [GLib] Add missing require in test
* [ARROW-6200](https://issues.apache.org/jira/browse/ARROW-6200) - [Java] Method getBufferSizeFor in BaseRepeatedValueVector/ListVector not correct
* [ARROW-6202](https://issues.apache.org/jira/browse/ARROW-6202) - [Java] Exception in thread "main" org.apache.arrow.memory.OutOfMemoryException: Unable to allocate buffer of size 4 due to memory limit. Current allocation: 2147483646
* [ARROW-6205](https://issues.apache.org/jira/browse/ARROW-6205) - [C++] ARROW\_DEPRECATED warning when including io/interfaces.h from CUDA (.cu) source
* [ARROW-6208](https://issues.apache.org/jira/browse/ARROW-6208) - [Java] Correct byte order before comparing in ByteFunctionHelpers
* [ARROW-6210](https://issues.apache.org/jira/browse/ARROW-6210) - [Java] remove equals API from ValueVector
* [ARROW-6211](https://issues.apache.org/jira/browse/ARROW-6211) - [Java] Remove dependency on RangeEqualsVisitor from ValueVector interface
* [ARROW-6214](https://issues.apache.org/jira/browse/ARROW-6214) - [R] Sanitizer errors triggered via R bindings
* [ARROW-6215](https://issues.apache.org/jira/browse/ARROW-6215) - [Java] RangeEqualVisitor does not properly compare ZeroVector
* [ARROW-6218](https://issues.apache.org/jira/browse/ARROW-6218) - [Java] Add UINT type test in integration to avoid potential overflow
* [ARROW-6223](https://issues.apache.org/jira/browse/ARROW-6223) - [C++] Configuration error with Anaconda Python 3.7.4
* [ARROW-6224](https://issues.apache.org/jira/browse/ARROW-6224) - [Python] remaining usages of the 'data' attribute (from previous Column) cause warnings
* [ARROW-6227](https://issues.apache.org/jira/browse/ARROW-6227) - [Python] pyarrow.array() shouldn't coerce np.nan to string
* [ARROW-6234](https://issues.apache.org/jira/browse/ARROW-6234) - [Java] ListVector hashCode() is not correct
* [ARROW-6241](https://issues.apache.org/jira/browse/ARROW-6241) - [Java] Failures on master
* [ARROW-6255](https://issues.apache.org/jira/browse/ARROW-6255) - [Rust] [Parquet] Cannot use any published parquet crate due to parquet-format breaking change
* [ARROW-6259](https://issues.apache.org/jira/browse/ARROW-6259) - [C++][CI] Flatbuffers-related failures in CI on macOS
* [ARROW-6263](https://issues.apache.org/jira/browse/ARROW-6263) - [Python] RecordBatch.from\_arrays does not check array types against a passed schema
* [ARROW-6266](https://issues.apache.org/jira/browse/ARROW-6266) - [Java] Resolve the ambiguous method overload in RangeEqualsVisitor
* [ARROW-6268](https://issues.apache.org/jira/browse/ARROW-6268) - Empty buffer should have a valid address
* [ARROW-6269](https://issues.apache.org/jira/browse/ARROW-6269) - [C++][Fuzzing] IPC reads do not check decimal precision
* [ARROW-6270](https://issues.apache.org/jira/browse/ARROW-6270) - [C++][Fuzzing] IPC reads do not check buffer indices
* [ARROW-6290](https://issues.apache.org/jira/browse/ARROW-6290) - [Rust] [DataFusion] sql\_csv example errors when running
* [ARROW-6291](https://issues.apache.org/jira/browse/ARROW-6291) - [C++] CMake ignores ARROW\_PARQUET
* [ARROW-6293](https://issues.apache.org/jira/browse/ARROW-6293) - [Rust] datafusion 0.15.0-SNAPSHOT error
* [ARROW-6301](https://issues.apache.org/jira/browse/ARROW-6301) - [Python] atexit: pyarrow.lib.ArrowKeyError: 'No type extension with name arrow.py\_extension\_type found'
* [ARROW-6302](https://issues.apache.org/jira/browse/ARROW-6302) - [Python][Parquet] Reading dictionary type with serialized Arrow schema does not restore "ordered" type property
* [ARROW-6309](https://issues.apache.org/jira/browse/ARROW-6309) - [C++] Parquet tests and executables are linked statically
* [ARROW-6323](https://issues.apache.org/jira/browse/ARROW-6323) - [R] Expand file paths when passing to readers
* [ARROW-6325](https://issues.apache.org/jira/browse/ARROW-6325) - [Python] wrong conversion of DataFrame with boolean values
* [ARROW-6330](https://issues.apache.org/jira/browse/ARROW-6330) - [C++] Include missing headers in api.h
* [ARROW-6332](https://issues.apache.org/jira/browse/ARROW-6332) - [Java][C++][Gandiva] Handle size of varchar vectors correctly
* [ARROW-6339](https://issues.apache.org/jira/browse/ARROW-6339) - [Python][C++] Rowgroup statistics for pd.NaT array ill defined
* [ARROW-6343](https://issues.apache.org/jira/browse/ARROW-6343) - [Java] [Vector] Fix allocation helper
* [ARROW-6344](https://issues.apache.org/jira/browse/ARROW-6344) - [C++][Gandiva] substring does not handle multibyte characters
* [ARROW-6345](https://issues.apache.org/jira/browse/ARROW-6345) - [C++][Python] "ordered" flag seemingly not taken into account when comparing DictionaryType values for equality
* [ARROW-6348](https://issues.apache.org/jira/browse/ARROW-6348) - [R] arrow::read\_csv\_arrow namespace error when package not loaded
* [ARROW-6354](https://issues.apache.org/jira/browse/ARROW-6354) - [C++] Building without Parquet fails
* [ARROW-6363](https://issues.apache.org/jira/browse/ARROW-6363) - [R] segfault in Table\_\_from\_dots with unexpected schema
* [ARROW-6364](https://issues.apache.org/jira/browse/ARROW-6364) - [R] Handling unexpected input to time64() et al
* [ARROW-6369](https://issues.apache.org/jira/browse/ARROW-6369) - [Python] Support list-of-boolean in Array.to\_pandas conversion
* [ARROW-6371](https://issues.apache.org/jira/browse/ARROW-6371) - [Doc] Row to columnar conversion example mentions arrow::Column in comments
* [ARROW-6372](https://issues.apache.org/jira/browse/ARROW-6372) - [Rust][Datafusion] Casting from Un-signed to Signed Integers not supported
* [ARROW-6376](https://issues.apache.org/jira/browse/ARROW-6376) - [Developer] PR merge script has "master" target ref hard-coded
* [ARROW-6387](https://issues.apache.org/jira/browse/ARROW-6387) - [Archery] Errors with make
* [ARROW-6392](https://issues.apache.org/jira/browse/ARROW-6392) - [Python][Flight] list\_actions Server RPC is not tested in test\_flight.py, nor is return value validated
* [ARROW-6395](https://issues.apache.org/jira/browse/ARROW-6395) - [Python] Bug when using bool arrays with stride greater than 1
* [ARROW-6406](https://issues.apache.org/jira/browse/ARROW-6406) - [C++] jemalloc\_ep fails for offline build
* [ARROW-6411](https://issues.apache.org/jira/browse/ARROW-6411) - [C++][Parquet] DictEncoderImpl<T\>::PutIndicesTyped has bad performance on some systems
* [ARROW-6412](https://issues.apache.org/jira/browse/ARROW-6412) - [C++] arrow-flight-test can crash because of port allocation
* [ARROW-6418](https://issues.apache.org/jira/browse/ARROW-6418) - [C++] Plasma cmake targets are not exported
* [ARROW-6423](https://issues.apache.org/jira/browse/ARROW-6423) - [Python] pyarrow.CompressedOutputStream() never completes with compression='snappy'
* [ARROW-6424](https://issues.apache.org/jira/browse/ARROW-6424) - [C++][Fuzzing] Fuzzit nightly is broken
* [ARROW-6425](https://issues.apache.org/jira/browse/ARROW-6425) - [C++] ValidateArray fail for slice of list array
* [ARROW-6428](https://issues.apache.org/jira/browse/ARROW-6428) - [CI][Crossbow] Nightly turbodbc job fails
* [ARROW-6430](https://issues.apache.org/jira/browse/ARROW-6430) - [CI][Crossbow] Nightly R docker job fails
* [ARROW-6431](https://issues.apache.org/jira/browse/ARROW-6431) - [Python] Test suite fails without pandas installed
* [ARROW-6432](https://issues.apache.org/jira/browse/ARROW-6432) - [CI][Crossbow] Remove alpine crossbow jobs
* [ARROW-6433](https://issues.apache.org/jira/browse/ARROW-6433) - [CI][Crossbow] Nightly java docker job fails
* [ARROW-6434](https://issues.apache.org/jira/browse/ARROW-6434) - [CI][Crossbow] Nightly HDFS integration job fails
* [ARROW-6435](https://issues.apache.org/jira/browse/ARROW-6435) - [CI][Crossbow] Nightly dask integration job fails
* [ARROW-6440](https://issues.apache.org/jira/browse/ARROW-6440) - [CI][Crossbow] Nightly ubuntu, debian, and centos package builds fail
* [ARROW-6441](https://issues.apache.org/jira/browse/ARROW-6441) - [CI][Crossbow] Nightly Centos 6 job fails
* [ARROW-6442](https://issues.apache.org/jira/browse/ARROW-6442) - [CI][Crossbow] Nightly gandiva jar osx build fails
* [ARROW-6443](https://issues.apache.org/jira/browse/ARROW-6443) - [CI][Crossbow] Nightly conda osx builds fail
* [ARROW-6444](https://issues.apache.org/jira/browse/ARROW-6444) - [CI][Crossbow] Nightly conda Windows builds fail (time out)
* [ARROW-6446](https://issues.apache.org/jira/browse/ARROW-6446) - [OSX][Python][Wheel] Turn off ORC feature in the wheel building scripts
* [ARROW-6449](https://issues.apache.org/jira/browse/ARROW-6449) - [R] io "tell()" methods are inconsistently named and untested
* [ARROW-6457](https://issues.apache.org/jira/browse/ARROW-6457) - [C++] CMake build locally fails with MSVC 2015 build generator
* [ARROW-6461](https://issues.apache.org/jira/browse/ARROW-6461) - [Java] EchoServer can close socket before client has finished reading
* [ARROW-6472](https://issues.apache.org/jira/browse/ARROW-6472) - [Java] ValueVector\#accept may has potential cast exception
* [ARROW-6476](https://issues.apache.org/jira/browse/ARROW-6476) - [Java][CI] Travis java all-jdks job is broken
* [ARROW-6478](https://issues.apache.org/jira/browse/ARROW-6478) - [C++] Roll back to jemalloc stable-4 branch until performance issues in 5.2.x addressed
* [ARROW-6481](https://issues.apache.org/jira/browse/ARROW-6481) - [Python][C++] Bad performance of read\_csv() with column\_types
* [ARROW-6488](https://issues.apache.org/jira/browse/ARROW-6488) - [Python] pyarrow.NULL equals to itself
* [ARROW-6492](https://issues.apache.org/jira/browse/ARROW-6492) - [Python] file written with latest fastparquet cannot be read with latest pyarrow
* [ARROW-6502](https://issues.apache.org/jira/browse/ARROW-6502) - [GLib][CI] MinGW failure in CI
* [ARROW-6506](https://issues.apache.org/jira/browse/ARROW-6506) - [C++] Validation of ExtensionType with nested type fails
* [ARROW-6509](https://issues.apache.org/jira/browse/ARROW-6509) - [C++][Gandiva] Re-enable Gandiva JNI tests and fix Travis CI failure
* [ARROW-6509](https://issues.apache.org/jira/browse/ARROW-6509) - [C++][Gandiva] Re-enable Gandiva JNI tests and fix Travis CI failure
* [ARROW-6520](https://issues.apache.org/jira/browse/ARROW-6520) - [Python] Segmentation fault on writing tables with fixed size binary fields
* [ARROW-6522](https://issues.apache.org/jira/browse/ARROW-6522) - [Python] Test suite fails with pandas 0.23.4, pytest 3.8.1
* [ARROW-6530](https://issues.apache.org/jira/browse/ARROW-6530) - [CI][Crossbow][R] Nightly R job doesn't install all dependencies
* [ARROW-6550](https://issues.apache.org/jira/browse/ARROW-6550) - [C++] Filter expressions PR failing manylinux package builds
* [ARROW-6551](https://issues.apache.org/jira/browse/ARROW-6551) - [Python] Dask Parquet integration test failure
* [ARROW-6552](https://issues.apache.org/jira/browse/ARROW-6552) - [C++] boost::optional in STL test fails compiling in gcc 4.8.2
* [ARROW-6560](https://issues.apache.org/jira/browse/ARROW-6560) - [Python] Failures in \*-nopandas integration tests
* [ARROW-6561](https://issues.apache.org/jira/browse/ARROW-6561) - [Python] pandas-master integration test failure
* [ARROW-6562](https://issues.apache.org/jira/browse/ARROW-6562) - [GLib] Fix wrong sliced data of GArrowBuffer
* [ARROW-6564](https://issues.apache.org/jira/browse/ARROW-6564) - [Python] Do not require pandas for invoking Array.\_\_array\_\_
* [ARROW-6565](https://issues.apache.org/jira/browse/ARROW-6565) - [Rust] [DataFusion] Intermittent test failure due to temp dir already existing
* [ARROW-6568](https://issues.apache.org/jira/browse/ARROW-6568) - [C++][Python][Parquet] pyarrow.parquet crash writing zero-chunk dictionary-type column
* [ARROW-6572](https://issues.apache.org/jira/browse/ARROW-6572) - [C++] Reading some Parquet data can return uninitialized memory
* [ARROW-6573](https://issues.apache.org/jira/browse/ARROW-6573) - [Python] Segfault when writing to parquet
* [ARROW-6576](https://issues.apache.org/jira/browse/ARROW-6576) - [R] Fix sparklyr integration tests
* [ARROW-6586](https://issues.apache.org/jira/browse/ARROW-6586) - [Python][Packaging] Windows wheel builds failing with "DLL load failure"
* [ARROW-6597](https://issues.apache.org/jira/browse/ARROW-6597) - [Python] Segfault in test\_pandas with Python 2.7
* [ARROW-6618](https://issues.apache.org/jira/browse/ARROW-6618) - [Python] Reading a zero-size buffer can segfault
* [ARROW-6620](https://issues.apache.org/jira/browse/ARROW-6620) - [Python][CI] pandas-master build failing due to removal of "to\_sparse" method
* [ARROW-6622](https://issues.apache.org/jira/browse/ARROW-6622) - [C++][R] SubTreeFileSystem path error on Windows
* [ARROW-6623](https://issues.apache.org/jira/browse/ARROW-6623) - [CI][Python] Dask docker integration test broken perhaps by statistics-related change
* [ARROW-6639](https://issues.apache.org/jira/browse/ARROW-6639) - [Packaging][RPM] Add support for CentOS 7 on aarch64
* [ARROW-6640](https://issues.apache.org/jira/browse/ARROW-6640) - [C++] Error when BufferedInputStream Peek more than bytes buffered
* [ARROW-6641](https://issues.apache.org/jira/browse/ARROW-6641) - [C++] Remove Deprecated WriteableFile warning
* [ARROW-6642](https://issues.apache.org/jira/browse/ARROW-6642) - [Python] chained access of ParquetDataset's metadata segfaults
* [ARROW-6651](https://issues.apache.org/jira/browse/ARROW-6651) - [R] Fix R conda job
* [ARROW-6652](https://issues.apache.org/jira/browse/ARROW-6652) - [Python] to\_pandas conversion removes timezone from type
* [ARROW-6652](https://issues.apache.org/jira/browse/ARROW-6652) - [Python] to\_pandas conversion removes timezone from type
* [ARROW-6660](https://issues.apache.org/jira/browse/ARROW-6660) - [Rust] [DataFusion] Minor docs update for 0.15.0 release
* [ARROW-6670](https://issues.apache.org/jira/browse/ARROW-6670) - [CI][R] Fix fix for R nightly jobs
* [ARROW-6674](https://issues.apache.org/jira/browse/ARROW-6674) - [Python] Fix or ignore the test warnings
* [ARROW-6677](https://issues.apache.org/jira/browse/ARROW-6677) - [FlightRPC][C++] Document using Flight in C++
* [ARROW-6678](https://issues.apache.org/jira/browse/ARROW-6678) - [C++] Regression in Parquet file compatibility introduced by ARROW-3246
* [ARROW-6679](https://issues.apache.org/jira/browse/ARROW-6679) - [RELEASE] autobrew license in LICENSE.txt is not acceptable
* [ARROW-6682](https://issues.apache.org/jira/browse/ARROW-6682) - [C\#] Arrow R/C++ hangs reading binary file generated by C\#
* [ARROW-6687](https://issues.apache.org/jira/browse/ARROW-6687) - [Rust] [DataFusion] Query returns incorrect row count
* [ARROW-6687](https://issues.apache.org/jira/browse/ARROW-6687) - [Rust] [DataFusion] Query returns incorrect row count
* [ARROW-6701](https://issues.apache.org/jira/browse/ARROW-6701) - [C++][R] Lint failing on R cpp code
* [ARROW-6703](https://issues.apache.org/jira/browse/ARROW-6703) - [Packaging][Linux] Restore ARROW\_VERSION environment variable
* [ARROW-6705](https://issues.apache.org/jira/browse/ARROW-6705) - [Rust] [DataFusion] README has invalid github URL
* [ARROW-6709](https://issues.apache.org/jira/browse/ARROW-6709) - [JAVA] Jdbc adapter currentIndex should increment when value is null
* [ARROW-6714](https://issues.apache.org/jira/browse/ARROW-6714) - [R] Fix untested RecordBatchWriter case
* [ARROW-6716](https://issues.apache.org/jira/browse/ARROW-6716) - [CI] [Rust] New 1.40.0 nightly causing builds to fail
* [ARROW-6748](https://issues.apache.org/jira/browse/ARROW-6748) - [RUBY] gem compilation error
* [ARROW-6751](https://issues.apache.org/jira/browse/ARROW-6751) - [CI] ccache doesn't cache on Travis-CI
* [ARROW-6760](https://issues.apache.org/jira/browse/ARROW-6760) - [C++] JSON: improve error message when column changed type
* [ARROW-6773](https://issues.apache.org/jira/browse/ARROW-6773) - [C++] Filter kernel returns invalid data when filtering with an Array slice
* [ARROW-6796](https://issues.apache.org/jira/browse/ARROW-6796) - Certain moderately-sized (\~100MB) default-Snappy-compressed Parquet files take enormous memory and long time to load by pyarrow.parquet.read\_table
* [ARROW-7112](https://issues.apache.org/jira/browse/ARROW-7112) - Wrong contents when initializinga pyarrow.Table from boolean DataFrame
* [PARQUET-1623](https://issues.apache.org/jira/browse/PARQUET-1623) - [C++] Invalid memory access with a magic number of records
* [PARQUET-1631](https://issues.apache.org/jira/browse/PARQUET-1631) - [C++] ParquetInputWrapper::GetSize always returns 0
* [PARQUET-1640](https://issues.apache.org/jira/browse/PARQUET-1640) - [C++] parquet-encoding-benchmark crashes



# Apache Arrow 0.14.1 (2019-07-22)

## Bug Fixes

* [ARROW-5775](https://issues.apache.org/jira/browse/ARROW-5775) - [C++] StructArray : cached boxed fields not thread-safe
* [ARROW-5790](https://issues.apache.org/jira/browse/ARROW-5790) - [Python] Passing zero-dim numpy array to pa.array causes segfault
* [ARROW-5791](https://issues.apache.org/jira/browse/ARROW-5791) - [Python] pyarrow.csv.read\_csv hangs + eats all RAM
* [ARROW-5816](https://issues.apache.org/jira/browse/ARROW-5816) - [Release] Parallel curl does not work reliably in verify-release-candidate-sh
* [ARROW-5836](https://issues.apache.org/jira/browse/ARROW-5836) - [Java][OSX] Flight tests are failing: address already in use
* [ARROW-5838](https://issues.apache.org/jira/browse/ARROW-5838) - [C++][Flight][OSX] Building 3rdparty grpc cannot find OpenSSL
* [ARROW-5849](https://issues.apache.org/jira/browse/ARROW-5849) - [C++] Compiler warnings on mingw-w64
* [ARROW-5850](https://issues.apache.org/jira/browse/ARROW-5850) - [CI][R] R appveyor job is broken after release
* [ARROW-5851](https://issues.apache.org/jira/browse/ARROW-5851) - [C++] Compilation of reference benchmarks fails
* [ARROW-5856](https://issues.apache.org/jira/browse/ARROW-5856) - [Python] linking 3rd party cython modules against pyarrow fails since 0.14.0
* [ARROW-5863](https://issues.apache.org/jira/browse/ARROW-5863) - [Python] Segmentation Fault via pytest-runner
* [ARROW-5868](https://issues.apache.org/jira/browse/ARROW-5868) - [Python] manylinux2010 wheels have shared library dependency on liblz4
* [ARROW-5873](https://issues.apache.org/jira/browse/ARROW-5873) - [Python] Segmentation fault when comparing schema with None
* [ARROW-5874](https://issues.apache.org/jira/browse/ARROW-5874) - [Python] pyarrow 0.14.0 macOS wheels depend on shared libs under /usr/local/opt
* [ARROW-5878](https://issues.apache.org/jira/browse/ARROW-5878) - [Python][C++] Parquet reader not forward compatible for timestamps without timezone
* [ARROW-5886](https://issues.apache.org/jira/browse/ARROW-5886) - [Python][Packaging] Manylinux1/2010 compliance issue with libz
* [ARROW-5887](https://issues.apache.org/jira/browse/ARROW-5887) - [C\#] ArrowStreamWriter writes FieldNodes in wrong order
* [ARROW-5889](https://issues.apache.org/jira/browse/ARROW-5889) - [Python][C++] Parquet backwards compat for timestamps without timezone broken
* [ARROW-5899](https://issues.apache.org/jira/browse/ARROW-5899) - [Python][Packaging] Bundle uriparser.dll in windows wheels
* [ARROW-5921](https://issues.apache.org/jira/browse/ARROW-5921) - [C++][Fuzzing] Missing nullptr checks in IPC
* [PARQUET-1623](https://issues.apache.org/jira/browse/PARQUET-1623) - [C++] Invalid memory access with a magic number of records


## New Features and Improvements

* [ARROW-5101](https://issues.apache.org/jira/browse/ARROW-5101) - [Packaging] Avoid bundling static libraries in Windows conda packages
* [ARROW-5380](https://issues.apache.org/jira/browse/ARROW-5380) - [C++] Fix and enable UBSan for unaligned accesses.
* [ARROW-5564](https://issues.apache.org/jira/browse/ARROW-5564) - [C++] Add uriparser to conda-forge
* [ARROW-5609](https://issues.apache.org/jira/browse/ARROW-5609) - [C++] Set CMP0068 CMake policy to avoid macOS warnings
* [ARROW-5784](https://issues.apache.org/jira/browse/ARROW-5784) - [Release][GLib] Replace c\_glib/ after running c\_glib/autogen.sh in dev/release/02-source.sh
* [ARROW-5785](https://issues.apache.org/jira/browse/ARROW-5785) - [Rust] Rust datafusion implementation should not depend on rustyline
* [ARROW-5787](https://issues.apache.org/jira/browse/ARROW-5787) - [Release][Rust] Use local modules to verify RC
* [ARROW-5793](https://issues.apache.org/jira/browse/ARROW-5793) - [Release] Avoid duplicate known host SSH error in dev/release/03-binary.sh
* [ARROW-5794](https://issues.apache.org/jira/browse/ARROW-5794) - [Release] Skip uploading already uploaded binaries
* [ARROW-5795](https://issues.apache.org/jira/browse/ARROW-5795) - [Release] Add missing waits on uploading binaries
* [ARROW-5796](https://issues.apache.org/jira/browse/ARROW-5796) - [Release][APT] Update expected package list
* [ARROW-5797](https://issues.apache.org/jira/browse/ARROW-5797) - [Release][APT] Update supported distributions
* [ARROW-5820](https://issues.apache.org/jira/browse/ARROW-5820) - [Release] Remove undefined variable check from verify script
* [ARROW-5827](https://issues.apache.org/jira/browse/ARROW-5827) - [C++] Require c-ares CMake config
* [ARROW-5828](https://issues.apache.org/jira/browse/ARROW-5828) - [C++] Add Protocol Buffers version check
* [ARROW-5866](https://issues.apache.org/jira/browse/ARROW-5866) - [C++] Remove duplicate library in cpp/Brewfile
* [ARROW-5877](https://issues.apache.org/jira/browse/ARROW-5877) - [FlightRPC] Fix auth incompatibilities between Python/Java
* [ARROW-5904](https://issues.apache.org/jira/browse/ARROW-5904) - [Java] [Plasma] Fix compilation of Plasma Java client
* [ARROW-5908](https://issues.apache.org/jira/browse/ARROW-5908) - [C\#] ArrowStreamWriter doesn't align buffers to 8 bytes
* [ARROW-5934](https://issues.apache.org/jira/browse/ARROW-5934) - [Python] Bundle arrow's LICENSE with the wheels
* [ARROW-5937](https://issues.apache.org/jira/browse/ARROW-5937) - [Release] Stop parallel binary upload
* [ARROW-5938](https://issues.apache.org/jira/browse/ARROW-5938) - [Release] Create branch for adding release note automatically
* [ARROW-5939](https://issues.apache.org/jira/browse/ARROW-5939) - [Release] Add support for generating vote email template separately
* [ARROW-5940](https://issues.apache.org/jira/browse/ARROW-5940) - [Release] Add support for re-uploading sign/checksum for binary artifacts
* [ARROW-5941](https://issues.apache.org/jira/browse/ARROW-5941) - [Release] Avoid re-uploading already uploaded binary artifacts
* [ARROW-5958](https://issues.apache.org/jira/browse/ARROW-5958) - [Python] Link zlib statically in the wheels



# Apache Arrow 0.14.0 (2019-07-04)

## New Features and Improvements

* [ARROW-258](https://issues.apache.org/jira/browse/ARROW-258) - [Format] clarify definition of Buffer in context of RPC, IPC, File
* [ARROW-653](https://issues.apache.org/jira/browse/ARROW-653) - [Python / C++] Add debugging function to print an array's buffer contents in hexadecimal
* [ARROW-767](https://issues.apache.org/jira/browse/ARROW-767) - [C++] Adopt FileSystem abstraction
* [ARROW-835](https://issues.apache.org/jira/browse/ARROW-835) - [Format] Add Timedelta type to describe time intervals
* [ARROW-840](https://issues.apache.org/jira/browse/ARROW-840) - [Python] Provide Python API for creating user-defined data types that can survive Arrow IPC
* [ARROW-973](https://issues.apache.org/jira/browse/ARROW-973) - [Website] Add FAQ page about project
* [ARROW-1012](https://issues.apache.org/jira/browse/ARROW-1012) - [C++] Create a configurable implementation of RecordBatchReader that reads from Apache Parquet files
* [ARROW-1207](https://issues.apache.org/jira/browse/ARROW-1207) - [C++] Implement Map logical type
* [ARROW-1261](https://issues.apache.org/jira/browse/ARROW-1261) - [Java] Add container type for Map logical type
* [ARROW-1278](https://issues.apache.org/jira/browse/ARROW-1278) - Integration tests for Fixed Size List type
* [ARROW-1279](https://issues.apache.org/jira/browse/ARROW-1279) - [Integration][Java] Integration tests for Map type
* [ARROW-1280](https://issues.apache.org/jira/browse/ARROW-1280) - [C++] Implement Fixed Size List type
* [ARROW-1349](https://issues.apache.org/jira/browse/ARROW-1349) - [Packaging] Provide APT and Yum repositories
* [ARROW-1496](https://issues.apache.org/jira/browse/ARROW-1496) - [JS] Upload coverage data to codecov.io
* [ARROW-1558](https://issues.apache.org/jira/browse/ARROW-1558) - [C++] Implement boolean selection kernels
* [ARROW-1587](https://issues.apache.org/jira/browse/ARROW-1587) - [Format] Add metadata for user-defined logical types
* [ARROW-1774](https://issues.apache.org/jira/browse/ARROW-1774) - [C++] Add "view" function to create zero-copy views for compatible types, if supported
* [ARROW-1833](https://issues.apache.org/jira/browse/ARROW-1833) - [Java] Add accessor methods for data buffers that skip null checking
* [ARROW-1957](https://issues.apache.org/jira/browse/ARROW-1957) - [Python] Write nanosecond timestamps using new NANO LogicalType Parquet unit
* [ARROW-1983](https://issues.apache.org/jira/browse/ARROW-1983) - [Python] Add ability to write parquet \`\_metadata\` file
* [ARROW-2057](https://issues.apache.org/jira/browse/ARROW-2057) - [Python] Configure size of data pages in pyarrow.parquet.write\_table
* [ARROW-2102](https://issues.apache.org/jira/browse/ARROW-2102) - [C++] Implement take kernel functions - primitive value type
* [ARROW-2103](https://issues.apache.org/jira/browse/ARROW-2103) - [C++] Implement take kernel functions - string/binary value type
* [ARROW-2104](https://issues.apache.org/jira/browse/ARROW-2104) - [C++] Implement take kernel functions - nested array value type
* [ARROW-2105](https://issues.apache.org/jira/browse/ARROW-2105) - [C++] Implement take kernel functions - properly handle special indices
* [ARROW-2186](https://issues.apache.org/jira/browse/ARROW-2186) - [C++] Clean up architecture specific compiler flags
* [ARROW-2217](https://issues.apache.org/jira/browse/ARROW-2217) - [C++] Add option to use dynamic linking for compression library dependencies
* [ARROW-2298](https://issues.apache.org/jira/browse/ARROW-2298) - [Python] Add option to not consider NaN to be null when converting to an integer Arrow type
* [ARROW-2412](https://issues.apache.org/jira/browse/ARROW-2412) - [Integration] Add nested dictionary integration test
* [ARROW-2467](https://issues.apache.org/jira/browse/ARROW-2467) - [Rust] Generate code using Flatbuffers
* [ARROW-2517](https://issues.apache.org/jira/browse/ARROW-2517) - [Java] Add list<decimal\> writer
* [ARROW-2618](https://issues.apache.org/jira/browse/ARROW-2618) - [Rust] Bitmap constructor should accept for flag for default state (0 or 1)
* [ARROW-2667](https://issues.apache.org/jira/browse/ARROW-2667) - [C++/Python] Add pandas-like take method to Array
* [ARROW-2707](https://issues.apache.org/jira/browse/ARROW-2707) - [C++] Implement Table::Slice methods using Column::Slice
* [ARROW-2709](https://issues.apache.org/jira/browse/ARROW-2709) - [Python] write\_to\_dataset poor performance when splitting
* [ARROW-2730](https://issues.apache.org/jira/browse/ARROW-2730) - [C++] Set up CMAKE\_C\_FLAGS more thoughtfully instead of using CMAKE\_CXX\_FLAGS
* [ARROW-2796](https://issues.apache.org/jira/browse/ARROW-2796) - [C++] Simplify symbols.map file, use when building libarrow\_python
* [ARROW-2818](https://issues.apache.org/jira/browse/ARROW-2818) - [Python] Better error message when passing SparseDataFrame into Table.from\_pandas
* [ARROW-2835](https://issues.apache.org/jira/browse/ARROW-2835) - [C++] ReadAt/WriteAt are inconsistent with moving the files position
* [ARROW-2969](https://issues.apache.org/jira/browse/ARROW-2969) - [R] Convert between StructArray and "nested" data.frame column containing data frame in each cell
* [ARROW-2981](https://issues.apache.org/jira/browse/ARROW-2981) - [C++] Support scripts / documentation for running clang-tidy on codebase
* [ARROW-2984](https://issues.apache.org/jira/browse/ARROW-2984) - [JS] Refactor release verification script to share code with main source release verification script
* [ARROW-3040](https://issues.apache.org/jira/browse/ARROW-3040) - [Go] add support for comparing Arrays
* [ARROW-3041](https://issues.apache.org/jira/browse/ARROW-3041) - [Go] add support for TimeArray
* [ARROW-3052](https://issues.apache.org/jira/browse/ARROW-3052) - [C++] Detect ORC system packages
* [ARROW-3087](https://issues.apache.org/jira/browse/ARROW-3087) - [C++] Add kernels for comparison operations to scalars
* [ARROW-3144](https://issues.apache.org/jira/browse/ARROW-3144) - [C++] Move "dictionary" member from DictionaryType to ArrayData to allow for changing dictionaries between Array chunks
* [ARROW-3150](https://issues.apache.org/jira/browse/ARROW-3150) - [Python] Ship Flight-enabled Python wheels on Linux and Windows
* [ARROW-3166](https://issues.apache.org/jira/browse/ARROW-3166) - [C++] Consolidate IO interfaces used in arrow/io and parquet-cpp
* [ARROW-3191](https://issues.apache.org/jira/browse/ARROW-3191) - [Java] Add support for ArrowBuf to point to arbitrary memory.
* [ARROW-3200](https://issues.apache.org/jira/browse/ARROW-3200) - [C++] Add support for reading Flight streams with dictionaries
* [ARROW-3290](https://issues.apache.org/jira/browse/ARROW-3290) - [C++] Toolchain support for secure gRPC
* [ARROW-3294](https://issues.apache.org/jira/browse/ARROW-3294) - [C++] Test Flight RPC on Windows / Appveyor
* [ARROW-3314](https://issues.apache.org/jira/browse/ARROW-3314) - [R] Set -rpath using pkg-config when building
* [ARROW-3330](https://issues.apache.org/jira/browse/ARROW-3330) - [C++] Spawn multiple Flight performance servers in flight-benchmark to test parallel get performance
* [ARROW-3419](https://issues.apache.org/jira/browse/ARROW-3419) - [C++] Run include-what-you-use checks as nightly build
* [ARROW-3459](https://issues.apache.org/jira/browse/ARROW-3459) - [C++][Gandiva] Add support for variable length output vectors
* [ARROW-3475](https://issues.apache.org/jira/browse/ARROW-3475) - [C++] Int64Builder.Finish(NumericArray<Int64Type\>)
* [ARROW-3570](https://issues.apache.org/jira/browse/ARROW-3570) - [Packaging] Don't bundle test data files with python wheels
* [ARROW-3572](https://issues.apache.org/jira/browse/ARROW-3572) - [Packaging] Correctly handle ssh origin urls for crossbow
* [ARROW-3671](https://issues.apache.org/jira/browse/ARROW-3671) - [Go] implement Interval array
* [ARROW-3676](https://issues.apache.org/jira/browse/ARROW-3676) - [Go] implement Decimal128 array
* [ARROW-3679](https://issues.apache.org/jira/browse/ARROW-3679) - [Go] implement IPC protocol
* [ARROW-3680](https://issues.apache.org/jira/browse/ARROW-3680) - [Go] implement Float16 array
* [ARROW-3686](https://issues.apache.org/jira/browse/ARROW-3686) - [Python] Support for masked arrays in to/from numpy
* [ARROW-3702](https://issues.apache.org/jira/browse/ARROW-3702) - [R] POSIXct mapped to DateType not TimestampType?
* [ARROW-3714](https://issues.apache.org/jira/browse/ARROW-3714) - [CI] Run RAT checks in pre-commit hooks
* [ARROW-3729](https://issues.apache.org/jira/browse/ARROW-3729) - [C++] Support for writing TIMESTAMP\_NANOS Parquet metadata
* [ARROW-3732](https://issues.apache.org/jira/browse/ARROW-3732) - [R] Add functions to write RecordBatch or Schema to Message value, then read back
* [ARROW-3758](https://issues.apache.org/jira/browse/ARROW-3758) - [R] Build R library on Windows, document build instructions for Windows developers
* [ARROW-3759](https://issues.apache.org/jira/browse/ARROW-3759) - [R][CI] Build and test on Windows in Appveyor
* [ARROW-3767](https://issues.apache.org/jira/browse/ARROW-3767) - [C++] Add cast for Null to any type
* [ARROW-3780](https://issues.apache.org/jira/browse/ARROW-3780) - [R] Failed to fetch data: invalid data when collecting int16
* [ARROW-3791](https://issues.apache.org/jira/browse/ARROW-3791) - [C++] Add type inference for boolean values in CSV files
* [ARROW-3794](https://issues.apache.org/jira/browse/ARROW-3794) - [R] Consider mapping INT8 to integer() not raw()
* [ARROW-3804](https://issues.apache.org/jira/browse/ARROW-3804) - [R] Consider lowering required R runtime
* [ARROW-3810](https://issues.apache.org/jira/browse/ARROW-3810) - [R] type= argument for Array and ChunkedArray
* [ARROW-3811](https://issues.apache.org/jira/browse/ARROW-3811) - [R] struct arrays inference
* [ARROW-3814](https://issues.apache.org/jira/browse/ARROW-3814) - [R] RecordBatch$from\_arrays()
* [ARROW-3815](https://issues.apache.org/jira/browse/ARROW-3815) - [R] refine record batch factory
* [ARROW-3848](https://issues.apache.org/jira/browse/ARROW-3848) - [R] allow nbytes to be missing in RandomAccessFile$Read()
* [ARROW-3897](https://issues.apache.org/jira/browse/ARROW-3897) - [MATLAB] Add MATLAB support for writing numeric datatypes to a Feather file
* [ARROW-3904](https://issues.apache.org/jira/browse/ARROW-3904) - [C++/Python] Validate scale and precision of decimal128 type
* [ARROW-4013](https://issues.apache.org/jira/browse/ARROW-4013) - [Documentation][C++] Document how to build Apache Arrow on MSYS2
* [ARROW-4020](https://issues.apache.org/jira/browse/ARROW-4020) - [Release] Remove source artifacts from dev dist system after release vote passes
* [ARROW-4047](https://issues.apache.org/jira/browse/ARROW-4047) - [Python] Document use of int96 timestamps and options in Parquet docs
* [ARROW-4086](https://issues.apache.org/jira/browse/ARROW-4086) - [Java] Add apis to debug alloc failures
* [ARROW-4121](https://issues.apache.org/jira/browse/ARROW-4121) - [C++] Refactor memory allocation from InvertKernel
* [ARROW-4159](https://issues.apache.org/jira/browse/ARROW-4159) - [C++] Check for -Wdocumentation issues
* [ARROW-4194](https://issues.apache.org/jira/browse/ARROW-4194) - [Format] Metadata.rst does not specify timezone for Timestamp type
* [ARROW-4302](https://issues.apache.org/jira/browse/ARROW-4302) - [C++] Add OpenSSL to C++ build toolchain
* [ARROW-4337](https://issues.apache.org/jira/browse/ARROW-4337) - [C\#] Array / RecordBatch Builder Fluent API
* [ARROW-4343](https://issues.apache.org/jira/browse/ARROW-4343) - [C++] Add as complete as possible Ubuntu Trusty / 14.04 build to docker-compose setup
* [ARROW-4356](https://issues.apache.org/jira/browse/ARROW-4356) - [CI] Add integration (docker) test for turbodbc
* [ARROW-4369](https://issues.apache.org/jira/browse/ARROW-4369) - [Packaging] Release verification script should test linux packages via docker
* [ARROW-4452](https://issues.apache.org/jira/browse/ARROW-4452) - [Python] Serializing sparse torch tensors
* [ARROW-4453](https://issues.apache.org/jira/browse/ARROW-4453) - [Python] Create Cython wrappers for SparseTensor
* [ARROW-4467](https://issues.apache.org/jira/browse/ARROW-4467) -  [Rust] [DataFusion] Create a REPL & Dockerfile for DataFusion
* [ARROW-4503](https://issues.apache.org/jira/browse/ARROW-4503) - [C\#] ArrowStreamReader allocates and copies data excessively
* [ARROW-4504](https://issues.apache.org/jira/browse/ARROW-4504) - [C++] Reduce the number of unit test executables
* [ARROW-4505](https://issues.apache.org/jira/browse/ARROW-4505) - [C++] Nicer PrettyPrint for date32
* [ARROW-4566](https://issues.apache.org/jira/browse/ARROW-4566) - [C++][Flight] Add option to run arrow-flight-benchmark against a perf server running on a different host
* [ARROW-4596](https://issues.apache.org/jira/browse/ARROW-4596) - [Rust] [DataFusion] Implement COUNT aggregate function
* [ARROW-4622](https://issues.apache.org/jira/browse/ARROW-4622) - [C++] [Python] MakeDense and MakeSparse in UnionArray should accept a vector of Field
* [ARROW-4625](https://issues.apache.org/jira/browse/ARROW-4625) - [Flight] Wrap server busy-wait methods
* [ARROW-4626](https://issues.apache.org/jira/browse/ARROW-4626) - [Flight] Add application metadata field to DoGet
* [ARROW-4627](https://issues.apache.org/jira/browse/ARROW-4627) - [Flight] Add application metadata field to DoPut
* [ARROW-4701](https://issues.apache.org/jira/browse/ARROW-4701) - [C++] Add JSON chunker benchmarks
* [ARROW-4702](https://issues.apache.org/jira/browse/ARROW-4702) - [C++] Upgrade dependency versions
* [ARROW-4708](https://issues.apache.org/jira/browse/ARROW-4708) - [C++] Add multithreaded JSON reader
* [ARROW-4708](https://issues.apache.org/jira/browse/ARROW-4708) - [C++] Add multithreaded JSON reader
* [ARROW-4714](https://issues.apache.org/jira/browse/ARROW-4714) - [C++][Java] Providing JNI interface to Read ORC file via Arrow C++
* [ARROW-4717](https://issues.apache.org/jira/browse/ARROW-4717) - [C\#] Consider exposing ValueTask instead of Task
* [ARROW-4719](https://issues.apache.org/jira/browse/ARROW-4719) - [C\#] Implement ChunkedArray, Column and Table in C\#
* [ARROW-4741](https://issues.apache.org/jira/browse/ARROW-4741) - [Java] Add documentation to all classes and enable checkstyle for class javadocs
* [ARROW-4787](https://issues.apache.org/jira/browse/ARROW-4787) - [C++] Include "null" values (perhaps with an option to toggle on/off) in hash kernel actions
* [ARROW-4788](https://issues.apache.org/jira/browse/ARROW-4788) - [C++] Develop less verbose API for constructing StructArray
* [ARROW-4800](https://issues.apache.org/jira/browse/ARROW-4800) - [C++] Create/port a StatusOr implementation to be able to return a status or a type
* [ARROW-4805](https://issues.apache.org/jira/browse/ARROW-4805) - [Rust] Write temporal arrays to CSV
* [ARROW-4806](https://issues.apache.org/jira/browse/ARROW-4806) - [Rust] Support casting temporal arrays in cast kernels
* [ARROW-4824](https://issues.apache.org/jira/browse/ARROW-4824) - [Python] read\_csv should accept io.StringIO objects
* [ARROW-4827](https://issues.apache.org/jira/browse/ARROW-4827) - [C++] Implement benchmark comparison between two git revisions
* [ARROW-4847](https://issues.apache.org/jira/browse/ARROW-4847) - [Python] Add pyarrow.table factory function that dispatches to various ctors based on type of input
* [ARROW-4904](https://issues.apache.org/jira/browse/ARROW-4904) - [C++] Move implementations in arrow/ipc/test-common.h into libarrow\_testing
* [ARROW-4911](https://issues.apache.org/jira/browse/ARROW-4911) - [R] Support for building package for Windows
* [ARROW-4912](https://issues.apache.org/jira/browse/ARROW-4912) - [C++, Python] Allow specifying column names to CSV reader
* [ARROW-4913](https://issues.apache.org/jira/browse/ARROW-4913) - [Java][Memory] Limit number of ledgers and arrowbufs
* [ARROW-4945](https://issues.apache.org/jira/browse/ARROW-4945) - [Flight] Enable Flight integration tests in Travis
* [ARROW-4956](https://issues.apache.org/jira/browse/ARROW-4956) - [C\#] Allow ArrowBuffers to wrap external Memory in C\#
* [ARROW-4959](https://issues.apache.org/jira/browse/ARROW-4959) - [Gandiva][Crossbow] Builds broken
* [ARROW-4968](https://issues.apache.org/jira/browse/ARROW-4968) - [Rust] StructArray builder and From<\> methods should check that field types match schema
* [ARROW-4971](https://issues.apache.org/jira/browse/ARROW-4971) - [Go] DataType equality
* [ARROW-4972](https://issues.apache.org/jira/browse/ARROW-4972) - [Go] Array equality
* [ARROW-4973](https://issues.apache.org/jira/browse/ARROW-4973) - [Go] Slice Array equality
* [ARROW-4974](https://issues.apache.org/jira/browse/ARROW-4974) - [Go] Array approx equality
* [ARROW-4990](https://issues.apache.org/jira/browse/ARROW-4990) - [C++] Kernel to compare array with array
* [ARROW-4993](https://issues.apache.org/jira/browse/ARROW-4993) - [C++] Display summary at the end of CMake configuration
* [ARROW-5000](https://issues.apache.org/jira/browse/ARROW-5000) - [Python] Fix deprecation warning from setup.py
* [ARROW-5007](https://issues.apache.org/jira/browse/ARROW-5007) - [C++] Move DCHECK out of sse-utils
* [ARROW-5020](https://issues.apache.org/jira/browse/ARROW-5020) - [C++][Gandiva] Split Gandiva-related conda packages for builds into separate .yml conda env file
* [ARROW-5027](https://issues.apache.org/jira/browse/ARROW-5027) - [Python] Add JSON Reader
* [ARROW-5037](https://issues.apache.org/jira/browse/ARROW-5037) - [Rust] [DataFusion] Refactor aggregate module
* [ARROW-5038](https://issues.apache.org/jira/browse/ARROW-5038) - [Rust] [DataFusion] Implement AVG aggregate function
* [ARROW-5039](https://issues.apache.org/jira/browse/ARROW-5039) - [Rust] [DataFusion] Fix bugs in CAST support
* [ARROW-5040](https://issues.apache.org/jira/browse/ARROW-5040) - [C++] ArrayFromJSON can't parse Timestamp from strings
* [ARROW-5045](https://issues.apache.org/jira/browse/ARROW-5045) - [Rust] Code coverage silently failing in CI
* [ARROW-5053](https://issues.apache.org/jira/browse/ARROW-5053) - [Rust] [DataFusion] Use env var for location of arrow test data
* [ARROW-5054](https://issues.apache.org/jira/browse/ARROW-5054) - [C++][Release] Test Flight in verify-release-candidate.sh
* [ARROW-5056](https://issues.apache.org/jira/browse/ARROW-5056) - [Packaging] Adjust conda recipes to use ORC conda-forge package on unix systems
* [ARROW-5061](https://issues.apache.org/jira/browse/ARROW-5061) - [Release] Improve 03-binary performance
* [ARROW-5062](https://issues.apache.org/jira/browse/ARROW-5062) - [Java] Shade Java Guava dependency for Flight
* [ARROW-5063](https://issues.apache.org/jira/browse/ARROW-5063) - [Java] FlightClient should not create a child allocator
* [ARROW-5064](https://issues.apache.org/jira/browse/ARROW-5064) - [Release] Pass PKG\_CONFIG\_PATH to glib in the verification script
* [ARROW-5066](https://issues.apache.org/jira/browse/ARROW-5066) - [Integration] Add flags to enable/disable implementations in integration/integration\_test.py
* [ARROW-5071](https://issues.apache.org/jira/browse/ARROW-5071) - [Benchmarking] Performs a benchmark run with archery
* [ARROW-5076](https://issues.apache.org/jira/browse/ARROW-5076) - [Packaging] Improve post binary upload performance
* [ARROW-5077](https://issues.apache.org/jira/browse/ARROW-5077) - [Rust] Release process should change Cargo.toml to use release versions
* [ARROW-5078](https://issues.apache.org/jira/browse/ARROW-5078) - [Documentation] Sphinx is failed by RemovedInSphinx30Warning
* [ARROW-5079](https://issues.apache.org/jira/browse/ARROW-5079) - [Release] Add a script to release C\# package
* [ARROW-5080](https://issues.apache.org/jira/browse/ARROW-5080) - [Release] Add a script to release Rust packages
* [ARROW-5081](https://issues.apache.org/jira/browse/ARROW-5081) - [C++] Consistently use PATH\_SUFFIXES in CMake config
* [ARROW-5083](https://issues.apache.org/jira/browse/ARROW-5083) - [Developer] In merge\_arrow\_pr.py script, allow user to set a released Fix Version
* [ARROW-5088](https://issues.apache.org/jira/browse/ARROW-5088) - [C++] Do not set -Werror when using BUILD\_WARNING\_LEVEL=CHECKIN in release mode
* [ARROW-5091](https://issues.apache.org/jira/browse/ARROW-5091) - [Flight] Rename FlightGetInfo message to FlightInfo
* [ARROW-5093](https://issues.apache.org/jira/browse/ARROW-5093) - [Packaging] Add support for selective binary upload
* [ARROW-5094](https://issues.apache.org/jira/browse/ARROW-5094) - [Packaging] Add APT/Yum verification scripts
* [ARROW-5102](https://issues.apache.org/jira/browse/ARROW-5102) - [C++] Reduce header dependencies
* [ARROW-5108](https://issues.apache.org/jira/browse/ARROW-5108) - [Go] implement reading primitive arrays from Arrow file
* [ARROW-5109](https://issues.apache.org/jira/browse/ARROW-5109) - [Go] implement reading binary/string arrays from Arrow file
* [ARROW-5110](https://issues.apache.org/jira/browse/ARROW-5110) - [Go] implement reading struct arrays from Arrow file
* [ARROW-5111](https://issues.apache.org/jira/browse/ARROW-5111) - [Go] implement reading list arrays from Arrow file
* [ARROW-5112](https://issues.apache.org/jira/browse/ARROW-5112) - [Go] implement writing arrays to Arrow file
* [ARROW-5113](https://issues.apache.org/jira/browse/ARROW-5113) - [C++][Flight] Unit tests in C++ for DoPut
* [ARROW-5115](https://issues.apache.org/jira/browse/ARROW-5115) - [JS] Implement the Vector Builders
* [ARROW-5116](https://issues.apache.org/jira/browse/ARROW-5116) - [Rust] move kernel related files under compute/kernels
* [ARROW-5124](https://issues.apache.org/jira/browse/ARROW-5124) - [C++] Add support for Parquet in MinGW build
* [ARROW-5126](https://issues.apache.org/jira/browse/ARROW-5126) - [Rust] [Parquet] Convert parquet column desc to arrow data type
* [ARROW-5127](https://issues.apache.org/jira/browse/ARROW-5127) - [Rust] [Parquet] Add page iterator
* [ARROW-5136](https://issues.apache.org/jira/browse/ARROW-5136) - [Flight] Implement call options (timeouts)
* [ARROW-5137](https://issues.apache.org/jira/browse/ARROW-5137) - [Flight] Implement authentication APIs
* [ARROW-5145](https://issues.apache.org/jira/browse/ARROW-5145) - [C++] Release mode lacks convenience input validation
* [ARROW-5150](https://issues.apache.org/jira/browse/ARROW-5150) - [Ruby] Add Arrow::Table\#raw\_records
* [ARROW-5155](https://issues.apache.org/jira/browse/ARROW-5155) - [GLib][Ruby] Add support for building union arrays from data type
* [ARROW-5157](https://issues.apache.org/jira/browse/ARROW-5157) - [Website] Add MATLAB to powered by Apache Arrow page
* [ARROW-5162](https://issues.apache.org/jira/browse/ARROW-5162) - [Rust] [Parquet] Rename mod reader to arrow.
* [ARROW-5163](https://issues.apache.org/jira/browse/ARROW-5163) - [Gandiva] Cast timestamp/date are incorrectly evaluating year 0097 to 1997
* [ARROW-5164](https://issues.apache.org/jira/browse/ARROW-5164) - [Gandiva] [C++] Introduce 32bit hash functions
* [ARROW-5165](https://issues.apache.org/jira/browse/ARROW-5165) - [Python][Documentation] Build docs don't suggest assigning $ARROW\_BUILD\_TYPE
* [ARROW-5168](https://issues.apache.org/jira/browse/ARROW-5168) - [GLib] Add garrow\_array\_take()
* [ARROW-5171](https://issues.apache.org/jira/browse/ARROW-5171) - [C++] Use LESS instead of LOWER in compare enum option.
* [ARROW-5172](https://issues.apache.org/jira/browse/ARROW-5172) - [Go] implement reading fixed-size binary arrays from Arrow file
* [ARROW-5178](https://issues.apache.org/jira/browse/ARROW-5178) - [Python] Allow creating Table from Python dict
* [ARROW-5179](https://issues.apache.org/jira/browse/ARROW-5179) - [Python] Return plain dicts, not OrderedDict, on Python 3.7+
* [ARROW-5185](https://issues.apache.org/jira/browse/ARROW-5185) - [C++] Add support for Boost with CMake configuration file
* [ARROW-5187](https://issues.apache.org/jira/browse/ARROW-5187) - [Rust] Ability to flatten StructArray into a RecordBatch
* [ARROW-5188](https://issues.apache.org/jira/browse/ARROW-5188) - [Rust] Add temporal builders for StructArray
* [ARROW-5189](https://issues.apache.org/jira/browse/ARROW-5189) - [Rust] [Parquet] Format individual fields within a parquet row
* [ARROW-5190](https://issues.apache.org/jira/browse/ARROW-5190) - [R] Discussion: tibble dependency in R package
* [ARROW-5191](https://issues.apache.org/jira/browse/ARROW-5191) - [Rust] Expose CSV and JSON reader schemas
* [ARROW-5203](https://issues.apache.org/jira/browse/ARROW-5203) - [GLib] Add support for Compare filter
* [ARROW-5204](https://issues.apache.org/jira/browse/ARROW-5204) - [C++] Improve BufferBuilder performance
* [ARROW-5212](https://issues.apache.org/jira/browse/ARROW-5212) - [Go] Array BinaryBuilder in Go library has no access to resize the values buffer
* [ARROW-5218](https://issues.apache.org/jira/browse/ARROW-5218) - [C++] Improve build when third-party library locations are specified
* [ARROW-5219](https://issues.apache.org/jira/browse/ARROW-5219) - [C++] Build protobuf\_ep in parallel when using Ninja
* [ARROW-5222](https://issues.apache.org/jira/browse/ARROW-5222) - [Python] Issues with installing pyarrow for development on MacOS
* [ARROW-5225](https://issues.apache.org/jira/browse/ARROW-5225) - [Java] Improve performance of BaseValueVector\#getValidityBufferSizeFromCount
* [ARROW-5226](https://issues.apache.org/jira/browse/ARROW-5226) - [Gandiva] support compare operators for decimal
* [ARROW-5238](https://issues.apache.org/jira/browse/ARROW-5238) - [Python] Improve usability of pyarrow.dictionary function
* [ARROW-5241](https://issues.apache.org/jira/browse/ARROW-5241) - [Python] Add option to disable writing statistics to parquet file
* [ARROW-5250](https://issues.apache.org/jira/browse/ARROW-5250) - [Java] remove javadoc suppression on methods.
* [ARROW-5252](https://issues.apache.org/jira/browse/ARROW-5252) - [C++] Change variant implementation
* [ARROW-5256](https://issues.apache.org/jira/browse/ARROW-5256) - [Packaging][deb] Failed to build with LLVM 7.1.0
* [ARROW-5257](https://issues.apache.org/jira/browse/ARROW-5257) - [Website] Update site to use "official" Apache Arrow logo, add clearly marked links to logo
* [ARROW-5258](https://issues.apache.org/jira/browse/ARROW-5258) - [C++/Python] Expose file metadata of dataset pieces to caller
* [ARROW-5261](https://issues.apache.org/jira/browse/ARROW-5261) - [C++] Finish implementation of scalar types for Duration and Interval
* [ARROW-5262](https://issues.apache.org/jira/browse/ARROW-5262) - [Python] Fix typo
* [ARROW-5264](https://issues.apache.org/jira/browse/ARROW-5264) - [Java] Allow enabling/disabling boundary checking by environmental variable
* [ARROW-5266](https://issues.apache.org/jira/browse/ARROW-5266) - [Go] implement read/write IPC for Float16
* [ARROW-5268](https://issues.apache.org/jira/browse/ARROW-5268) - [GLib] Add GArrowJSONReader
* [ARROW-5269](https://issues.apache.org/jira/browse/ARROW-5269) - [C++] Whitelist benchmarks candidates for regression checks
* [ARROW-5275](https://issues.apache.org/jira/browse/ARROW-5275) - [C++] Write generic filesystem tests
* [ARROW-5281](https://issues.apache.org/jira/browse/ARROW-5281) - [Rust] [Parquet] Move DataPageBuilder to test\_common
* [ARROW-5284](https://issues.apache.org/jira/browse/ARROW-5284) - [Rust] Replace libc with std::alloc for memory allocation
* [ARROW-5286](https://issues.apache.org/jira/browse/ARROW-5286) - [Python] support Structs in Table.from\_pandas given a known schema
* [ARROW-5288](https://issues.apache.org/jira/browse/ARROW-5288) - [Documentation] Enrich the contribution guidelines
* [ARROW-5289](https://issues.apache.org/jira/browse/ARROW-5289) - [C++] Move arrow/util/concatenate.h to arrow/array/
* [ARROW-5290](https://issues.apache.org/jira/browse/ARROW-5290) - [Java] Provide a flag to enable/disable null-checking in vectors' get methods
* [ARROW-5291](https://issues.apache.org/jira/browse/ARROW-5291) - [Python] Add wrapper for "take" kernel on Array
* [ARROW-5298](https://issues.apache.org/jira/browse/ARROW-5298) - [Rust] Add debug implementation for Buffer
* [ARROW-5299](https://issues.apache.org/jira/browse/ARROW-5299) - [C++] ListArray comparison is incorrect
* [ARROW-5309](https://issues.apache.org/jira/browse/ARROW-5309) - [Python] Add clarifications to Python "append" methods that return new objects
* [ARROW-5311](https://issues.apache.org/jira/browse/ARROW-5311) - [C++] Return more specific invalid Status in Take kernel
* [ARROW-5313](https://issues.apache.org/jira/browse/ARROW-5313) - [Format] Comments on Field table are a bit confusing
* [ARROW-5317](https://issues.apache.org/jira/browse/ARROW-5317) - [Rust] [Parquet] impl IntoIterator for SerializedFileReader
* [ARROW-5319](https://issues.apache.org/jira/browse/ARROW-5319) - [CI] Enable ccache with MinGW builds
* [ARROW-5321](https://issues.apache.org/jira/browse/ARROW-5321) - [Gandiva][C++] add isnull and isnotnull for utf8 and binary types
* [ARROW-5323](https://issues.apache.org/jira/browse/ARROW-5323) - [CI] Use compression with clcache
* [ARROW-5328](https://issues.apache.org/jira/browse/ARROW-5328) - [R] Add shell scripts to do a full package rebuild and test locally
* [ARROW-5329](https://issues.apache.org/jira/browse/ARROW-5329) - Add support for building MATLAB interface to Feather directly within MATLAB
* [ARROW-5334](https://issues.apache.org/jira/browse/ARROW-5334) - [C++] Add "Type" to names of arrow::Integer, arrow::FloatingPoint classes for consistency
* [ARROW-5335](https://issues.apache.org/jira/browse/ARROW-5335) - [Python] Raise on variable dictionaries when converting to pandas
* [ARROW-5339](https://issues.apache.org/jira/browse/ARROW-5339) - [C++] Add jemalloc to thirdparty dependency download script
* [ARROW-5341](https://issues.apache.org/jira/browse/ARROW-5341) - [C++] Add instructions about fixing and testing for -Wdocumentation clang warnings locally
* [ARROW-5342](https://issues.apache.org/jira/browse/ARROW-5342) - [Format] Formalize extension type metadata in IPC protocol
* [ARROW-5346](https://issues.apache.org/jira/browse/ARROW-5346) - [C++] Revert changes to qualify duration in vendored date code
* [ARROW-5349](https://issues.apache.org/jira/browse/ARROW-5349) - [Python/C++] Provide a way to specify the file path in parquet ColumnChunkMetaData
* [ARROW-5361](https://issues.apache.org/jira/browse/ARROW-5361) - [R] Follow DictionaryType/DictionaryArray changes from ARROW-3144
* [ARROW-5363](https://issues.apache.org/jira/browse/ARROW-5363) - [GLib] Fix coding styles
* [ARROW-5364](https://issues.apache.org/jira/browse/ARROW-5364) - [C++] Use ASCII rather than UTF-8 in BuildUtils.cmake comment
* [ARROW-5365](https://issues.apache.org/jira/browse/ARROW-5365) - [C++][CI] Add UBSan and ASAN into CI
* [ARROW-5368](https://issues.apache.org/jira/browse/ARROW-5368) - [C++] Disable jemalloc by default with MinGW
* [ARROW-5369](https://issues.apache.org/jira/browse/ARROW-5369) - [C++] Add support for glog on Windows
* [ARROW-5370](https://issues.apache.org/jira/browse/ARROW-5370) - [C++] Detect system uriparser by default
* [ARROW-5372](https://issues.apache.org/jira/browse/ARROW-5372) - [GLib] Add support for null/boolean values CSV read option
* [ARROW-5378](https://issues.apache.org/jira/browse/ARROW-5378) - [C++] Add local FileSystem implementation
* [ARROW-5384](https://issues.apache.org/jira/browse/ARROW-5384) - [Go] add FixedSizeList array
* [ARROW-5389](https://issues.apache.org/jira/browse/ARROW-5389) - [C++] Add an internal temporary directory API
* [ARROW-5392](https://issues.apache.org/jira/browse/ARROW-5392) - [C++][CI][MinGW] Disable static library build on AppVeyor
* [ARROW-5393](https://issues.apache.org/jira/browse/ARROW-5393) - [R] Add tests and example for read\_parquet()
* [ARROW-5395](https://issues.apache.org/jira/browse/ARROW-5395) - [C++] Utilize stream EOS in File format
* [ARROW-5396](https://issues.apache.org/jira/browse/ARROW-5396) - [JS] Ensure reader and writer support files and streams with no RecordBatches
* [ARROW-5401](https://issues.apache.org/jira/browse/ARROW-5401) - [CI] [C++] Print ccache statistics on Travis-CI
* [ARROW-5404](https://issues.apache.org/jira/browse/ARROW-5404) - [C++] nonstd::string\_view conflicts with std::string\_view in c++17
* [ARROW-5407](https://issues.apache.org/jira/browse/ARROW-5407) - [C++] Integration test Travis CI entry builds many unnecessary targets
* [ARROW-5413](https://issues.apache.org/jira/browse/ARROW-5413) - [C++] CSV reader doesn't remove BOM
* [ARROW-5415](https://issues.apache.org/jira/browse/ARROW-5415) - [Release] Release script should update R version everywhere
* [ARROW-5416](https://issues.apache.org/jira/browse/ARROW-5416) - [Website] Add Homebrew to project installation page
* [ARROW-5418](https://issues.apache.org/jira/browse/ARROW-5418) - [CI][R] Run code coverage and report to codecov.io
* [ARROW-5420](https://issues.apache.org/jira/browse/ARROW-5420) - [Java] Implement or remove getCurrentSizeInBytes in VariableWidthVector
* [ARROW-5427](https://issues.apache.org/jira/browse/ARROW-5427) - [Python] RangeIndex serialization change implications
* [ARROW-5428](https://issues.apache.org/jira/browse/ARROW-5428) - [C++] Add option to set "read extent" in arrow::io::BufferedInputStream
* [ARROW-5429](https://issues.apache.org/jira/browse/ARROW-5429) - [Java] Provide alternative buffer allocation policy
* [ARROW-5432](https://issues.apache.org/jira/browse/ARROW-5432) - [Python] Add 'read\_at' method to pyarrow.NativeFile
* [ARROW-5433](https://issues.apache.org/jira/browse/ARROW-5433) - [C++][Parquet] improve parquet-reader columns information
* [ARROW-5434](https://issues.apache.org/jira/browse/ARROW-5434) - [Java] Introduce wrappers for backward compatibility for ArrowBuf changes in ARROW-3191
* [ARROW-5436](https://issues.apache.org/jira/browse/ARROW-5436) - [Python] expose filters argument in parquet.read\_table
* [ARROW-5438](https://issues.apache.org/jira/browse/ARROW-5438) - [JS] Utilize stream EOS in File format
* [ARROW-5441](https://issues.apache.org/jira/browse/ARROW-5441) - [C++] Implement FindArrowFlight.cmake
* [ARROW-5442](https://issues.apache.org/jira/browse/ARROW-5442) - [Website] Clarify what makes a release artifact "official"
* [ARROW-5443](https://issues.apache.org/jira/browse/ARROW-5443) - [Gandiva][Crossbow] Turn parquet encryption off
* [ARROW-5447](https://issues.apache.org/jira/browse/ARROW-5447) - [CI] [Ruby] CI is failed on AppVeyor
* [ARROW-5449](https://issues.apache.org/jira/browse/ARROW-5449) - [C++] Local filesystem implementation: investigate Windows UNC paths
* [ARROW-5451](https://issues.apache.org/jira/browse/ARROW-5451) - [C++][Gandiva] Add round functions for decimals
* [ARROW-5452](https://issues.apache.org/jira/browse/ARROW-5452) - [R] Add documentation website (pkgdown)
* [ARROW-5461](https://issues.apache.org/jira/browse/ARROW-5461) - [Java] Add micro-benchmarks for Float8Vector and allocators
* [ARROW-5463](https://issues.apache.org/jira/browse/ARROW-5463) - [Rust] Implement AsRef for Buffer
* [ARROW-5464](https://issues.apache.org/jira/browse/ARROW-5464) - [Archery] Bad --benchmark-filter default
* [ARROW-5465](https://issues.apache.org/jira/browse/ARROW-5465) - [Crossbow] Support writing submitted job definition yaml to a file
* [ARROW-5466](https://issues.apache.org/jira/browse/ARROW-5466) - [Java] Dockerize Java builds in Travis CI, run multiple JDKs in single entry
* [ARROW-5467](https://issues.apache.org/jira/browse/ARROW-5467) - [Go] implement read/write IPC for Time32/Time64 arrays
* [ARROW-5468](https://issues.apache.org/jira/browse/ARROW-5468) - [Go] implement read/write IPC for Timestamp arrays
* [ARROW-5469](https://issues.apache.org/jira/browse/ARROW-5469) - [Go] implement read/write IPC for Date32/Date64 arrays
* [ARROW-5470](https://issues.apache.org/jira/browse/ARROW-5470) - [CI] C++ local filesystem patch breaks Travis R job
* [ARROW-5472](https://issues.apache.org/jira/browse/ARROW-5472) - [Development] Add warning to PR merge tool if no JIRA component is set
* [ARROW-5474](https://issues.apache.org/jira/browse/ARROW-5474) - [C++] Document required Boost version
* [ARROW-5475](https://issues.apache.org/jira/browse/ARROW-5475) - [Python] Add Python binding for arrow::Concatenate
* [ARROW-5476](https://issues.apache.org/jira/browse/ARROW-5476) - [Java][Memory] Fix Netty ArrowBuf Slice
* [ARROW-5477](https://issues.apache.org/jira/browse/ARROW-5477) - [C++] Check required RapidJSON version
* [ARROW-5478](https://issues.apache.org/jira/browse/ARROW-5478) - [Packaging] Drop Ubuntu 14.04 support
* [ARROW-5481](https://issues.apache.org/jira/browse/ARROW-5481) - [GLib] garrow\_seekable\_input\_stream\_peek() misses "error" parameter document
* [ARROW-5485](https://issues.apache.org/jira/browse/ARROW-5485) - [Gandiva][Crossbow] OSx builds failing
* [ARROW-5485](https://issues.apache.org/jira/browse/ARROW-5485) - [Gandiva][Crossbow] OSx builds failing
* [ARROW-5486](https://issues.apache.org/jira/browse/ARROW-5486) - [GLib] Add binding of gandiva::FunctionRegistry and related things
* [ARROW-5488](https://issues.apache.org/jira/browse/ARROW-5488) - [R] Workaround when C++ lib not available
* [ARROW-5490](https://issues.apache.org/jira/browse/ARROW-5490) - [C++] Remove ARROW\_BOOST\_HEADER\_ONLY
* [ARROW-5491](https://issues.apache.org/jira/browse/ARROW-5491) - [C++] Remove unecessary semicolons following MACRO definitions
* [ARROW-5492](https://issues.apache.org/jira/browse/ARROW-5492) - [R] Add "col\_select" argument to read\_\* functions to read subset of columns
* [ARROW-5495](https://issues.apache.org/jira/browse/ARROW-5495) - [C++] Use HTTPS consistently for downloading dependencies
* [ARROW-5496](https://issues.apache.org/jira/browse/ARROW-5496) - [R][CI] Fix relative paths in R codecov.io reporting
* [ARROW-5498](https://issues.apache.org/jira/browse/ARROW-5498) - [C++] Build failure with Flatbuffers 1.11.0 and MinGW
* [ARROW-5499](https://issues.apache.org/jira/browse/ARROW-5499) - [R] Alternate bindings for when libarrow is not found
* [ARROW-5500](https://issues.apache.org/jira/browse/ARROW-5500) - [R] read\_csv\_arrow() signature should match readr::read\_csv()
* [ARROW-5503](https://issues.apache.org/jira/browse/ARROW-5503) - [R] add read\_json()
* [ARROW-5504](https://issues.apache.org/jira/browse/ARROW-5504) - [R] move use\_threads argument to global option
* [ARROW-5509](https://issues.apache.org/jira/browse/ARROW-5509) - [R] write\_parquet()
* [ARROW-5511](https://issues.apache.org/jira/browse/ARROW-5511) - [Packaging] Enable Flight in Conda packages
* [ARROW-5512](https://issues.apache.org/jira/browse/ARROW-5512) - [C++] Draft initial public APIs for Datasets project
* [ARROW-5513](https://issues.apache.org/jira/browse/ARROW-5513) - [Java] Refactor method name for getstartOffset to use camel case
* [ARROW-5516](https://issues.apache.org/jira/browse/ARROW-5516) - [Python] Development page for pyarrow has a missing dependency in using pip
* [ARROW-5518](https://issues.apache.org/jira/browse/ARROW-5518) - [Java] Set VectorSchemaRoot rowCount to 0 on allocateNew and clear
* [ARROW-5524](https://issues.apache.org/jira/browse/ARROW-5524) - [C++] Turn off PARQUET\_BUILD\_ENCRYPTION in CMake if OpenSSL not found
* [ARROW-5526](https://issues.apache.org/jira/browse/ARROW-5526) - [Developer] Add more prominent notice to GitHub issue template to direct bug reports to JIRA
* [ARROW-5529](https://issues.apache.org/jira/browse/ARROW-5529) - [Flight] Allow serving with multiple TLS certificates
* [ARROW-5531](https://issues.apache.org/jira/browse/ARROW-5531) - [Python] Support binary, utf8, and nested types in Array.from\_buffers
* [ARROW-5533](https://issues.apache.org/jira/browse/ARROW-5533) - [Plasma] Plasma client should be thread-safe
* [ARROW-5534](https://issues.apache.org/jira/browse/ARROW-5534) - [GLib] Add garrow\_table\_concatenate()
* [ARROW-5535](https://issues.apache.org/jira/browse/ARROW-5535) - [GLib] Add garrow\_table\_slice()
* [ARROW-5537](https://issues.apache.org/jira/browse/ARROW-5537) - [JS] Support delta dictionaries in RecordBatchWriter and DictionaryBuilder
* [ARROW-5538](https://issues.apache.org/jira/browse/ARROW-5538) - [C++] Restrict minimum OpenSSL version to 1.0.2
* [ARROW-5541](https://issues.apache.org/jira/browse/ARROW-5541) - [R] cast from negative int32 to uint32 and uint64 are now safe
* [ARROW-5544](https://issues.apache.org/jira/browse/ARROW-5544) - [Archery] should not return non-zero in \`benchmark diff\` sub command on regression
* [ARROW-5545](https://issues.apache.org/jira/browse/ARROW-5545) - [C++][Docs] Clarify expectation of UTC values for timestamps with time zones in C++ API docs
* [ARROW-5547](https://issues.apache.org/jira/browse/ARROW-5547) - [C++][FlightRPC] arrow-flight.pc isn't provided
* [ARROW-5552](https://issues.apache.org/jira/browse/ARROW-5552) - [Go] make Schema and Field implement Stringer
* [ARROW-5554](https://issues.apache.org/jira/browse/ARROW-5554) - Add a python wrapper for arrow::Concatenate
* [ARROW-5555](https://issues.apache.org/jira/browse/ARROW-5555) - [R] Add install\_arrow() function to assist the user in obtaining C++ runtime libraries
* [ARROW-5556](https://issues.apache.org/jira/browse/ARROW-5556) - [Doc] Document JSON reader
* [ARROW-5557](https://issues.apache.org/jira/browse/ARROW-5557) - [C++] Investigate performance of VisitBitsUnrolled on different platforms
* [ARROW-5565](https://issues.apache.org/jira/browse/ARROW-5565) - [Python] Document how to use gdb when working on pyarrow
* [ARROW-5567](https://issues.apache.org/jira/browse/ARROW-5567) - [C++]  Fix build error of memory-benchmark
* [ARROW-5571](https://issues.apache.org/jira/browse/ARROW-5571) - [R] Rework handing of ARROW\_R\_WITH\_PARQUET
* [ARROW-5574](https://issues.apache.org/jira/browse/ARROW-5574) - [R] documentation error for read\_arrow()
* [ARROW-5581](https://issues.apache.org/jira/browse/ARROW-5581) - [Java] Provide interfaces and initial implementations for vector sorting
* [ARROW-5582](https://issues.apache.org/jira/browse/ARROW-5582) - [Go] add support for comparing Records
* [ARROW-5586](https://issues.apache.org/jira/browse/ARROW-5586) - [R] convert Array of LIST type to R lists
* [ARROW-5587](https://issues.apache.org/jira/browse/ARROW-5587) - [Java] Add more maven style check for Java code
* [ARROW-5590](https://issues.apache.org/jira/browse/ARROW-5590) - [R] Run "no libarrow" R build in the same CI entry if possible
* [ARROW-5591](https://issues.apache.org/jira/browse/ARROW-5591) - [Go] implement read/write IPC for Duration & Intervals
* [ARROW-5597](https://issues.apache.org/jira/browse/ARROW-5597) - [Packaging][deb] Add Flight packages
* [ARROW-5600](https://issues.apache.org/jira/browse/ARROW-5600) - [R] R package namespace cleanup
* [ARROW-5602](https://issues.apache.org/jira/browse/ARROW-5602) - [Java][Gandiva] Add test for decimal round functions
* [ARROW-5604](https://issues.apache.org/jira/browse/ARROW-5604) - [Go] improve test coverage of type-traits
* [ARROW-5609](https://issues.apache.org/jira/browse/ARROW-5609) - [C++] Set CMP0068 CMake policy to avoid macOS warnings
* [ARROW-5612](https://issues.apache.org/jira/browse/ARROW-5612) - [Python][Documentation] Clarify date\_as\_object option behavior
* [ARROW-5621](https://issues.apache.org/jira/browse/ARROW-5621) - [Go] implement read/write IPC for Decimal128 arrays
* [ARROW-5622](https://issues.apache.org/jira/browse/ARROW-5622) - [C++][Dataset] arrow-dataset.pc isn't provided
* [ARROW-5625](https://issues.apache.org/jira/browse/ARROW-5625) - [R] convert Array of struct type to data frame columns
* [ARROW-5632](https://issues.apache.org/jira/browse/ARROW-5632) - [Doc] Add some documentation describing compile/debug workflow on macOS with Xcode IDE
* [ARROW-5633](https://issues.apache.org/jira/browse/ARROW-5633) - [Python] Enable bz2 in Linux wheels
* [ARROW-5635](https://issues.apache.org/jira/browse/ARROW-5635) - [C++] Support "compacting" a table
* [ARROW-5637](https://issues.apache.org/jira/browse/ARROW-5637) - [Gandiva] [Java]Complete IN Expression
* [ARROW-5639](https://issues.apache.org/jira/browse/ARROW-5639) - [Java] Remove floating point computation from getOffsetBufferValueCapacity
* [ARROW-5641](https://issues.apache.org/jira/browse/ARROW-5641) - [GLib] Remove enums files generated by GNU Autotools from Git targets
* [ARROW-5643](https://issues.apache.org/jira/browse/ARROW-5643) - [Flight] Add ability to override hostname checking
* [ARROW-5650](https://issues.apache.org/jira/browse/ARROW-5650) - [Python] Update manylinux dependency versions
* [ARROW-5652](https://issues.apache.org/jira/browse/ARROW-5652) - [CI] Fix iwyu docker image
* [ARROW-5653](https://issues.apache.org/jira/browse/ARROW-5653) - [CI] Fix cpp docker image
* [ARROW-5656](https://issues.apache.org/jira/browse/ARROW-5656) - [Python] Enable Flight wheels on macOS
* [ARROW-5659](https://issues.apache.org/jira/browse/ARROW-5659) - [C++] Add support for finding OpenSSL installed by Homebrew
* [ARROW-5660](https://issues.apache.org/jira/browse/ARROW-5660) - [GLib][CI] Use the latest macOS image and all Homebrew based libraries
* [ARROW-5661](https://issues.apache.org/jira/browse/ARROW-5661) - Support hash functions for decimal in Gandiva
* [ARROW-5662](https://issues.apache.org/jira/browse/ARROW-5662) - [C++] Add support for BOOST\_SOURCE=AUTO|BUNDLED|SYSTEM
* [ARROW-5663](https://issues.apache.org/jira/browse/ARROW-5663) - [Packaging][RPM] Update CentOS packages for 0.14.0
* [ARROW-5664](https://issues.apache.org/jira/browse/ARROW-5664) - [Crossbow] Execute nightly crossbow tests on CircleCI instead of Travis
* [ARROW-5668](https://issues.apache.org/jira/browse/ARROW-5668) - [Python] Display "not null" in Schema.\_\_repr\_\_ for non-nullable fields
* [ARROW-5669](https://issues.apache.org/jira/browse/ARROW-5669) - [Crossbow] manylinux1 wheel building failing
* [ARROW-5670](https://issues.apache.org/jira/browse/ARROW-5670) - [Crossbow] get\_apache\_mirror.py fails with TLS error on macOS with Python 3.5
* [ARROW-5671](https://issues.apache.org/jira/browse/ARROW-5671) - [crossbow] mac os python wheels failing
* [ARROW-5672](https://issues.apache.org/jira/browse/ARROW-5672) - [Java] Refactor redundant method modifier
* [ARROW-5683](https://issues.apache.org/jira/browse/ARROW-5683) - [R] Add snappy to Rtools Windows builds
* [ARROW-5684](https://issues.apache.org/jira/browse/ARROW-5684) - [Packaging][deb] Add support for Ubuntu 19.04
* [ARROW-5685](https://issues.apache.org/jira/browse/ARROW-5685) - [Packaging][deb] Add support for Apache Arrow Datasets
* [ARROW-5687](https://issues.apache.org/jira/browse/ARROW-5687) - [C++] Remove remaining uses of ARROW\_BOOST\_VENDORED
* [ARROW-5690](https://issues.apache.org/jira/browse/ARROW-5690) - [Packaging][Python] macOS wheels broken: libprotobuf.18.dylib missing
* [ARROW-5694](https://issues.apache.org/jira/browse/ARROW-5694) - [Python] List of decimals are not supported when converting to pandas
* [ARROW-5695](https://issues.apache.org/jira/browse/ARROW-5695) - [C\#][Release] Run sourcelink test in verify-release-candidate.sh
* [ARROW-5696](https://issues.apache.org/jira/browse/ARROW-5696) - [Gandiva] [C++] Introduce castVarcharVarchar
* [ARROW-5699](https://issues.apache.org/jira/browse/ARROW-5699) - [C++] Optimize parsing of Decimal128 in CSV
* [ARROW-5701](https://issues.apache.org/jira/browse/ARROW-5701) - [C++][Gandiva] Build expressions only for the required selection vector types
* [ARROW-5702](https://issues.apache.org/jira/browse/ARROW-5702) - [C++] parquet::arrow::FileReader::GetSchema()
* [ARROW-5704](https://issues.apache.org/jira/browse/ARROW-5704) - [C++] Stop using ARROW\_TEMPLATE\_EXPORT for SparseTensorImpl class
* [ARROW-5705](https://issues.apache.org/jira/browse/ARROW-5705) - [Java] Optimize BaseValueVector\#computeCombinedBufferSize logic
* [ARROW-5706](https://issues.apache.org/jira/browse/ARROW-5706) - [Java] Remove type conversion in getValidityBufferValueCapacity
* [ARROW-5707](https://issues.apache.org/jira/browse/ARROW-5707) - [Java] Improve the performance and code structure for ArrowRecordBatch
* [ARROW-5710](https://issues.apache.org/jira/browse/ARROW-5710) - [C++] Allow compiling Gandiva with Ninja on Windows
* [ARROW-5715](https://issues.apache.org/jira/browse/ARROW-5715) - [Release] Verify Ubuntu 19.04 APT repository
* [ARROW-5718](https://issues.apache.org/jira/browse/ARROW-5718) - [R] auto splice data frames in record\_batch() and table()
* [ARROW-5720](https://issues.apache.org/jira/browse/ARROW-5720) - [C++] Create benchmarks for decimal related classes.
* [ARROW-5721](https://issues.apache.org/jira/browse/ARROW-5721) - [Rust] Move array related code into a separate module
* [ARROW-5724](https://issues.apache.org/jira/browse/ARROW-5724) - [R] [CI] AppVeyor build should use ccache
* [ARROW-5725](https://issues.apache.org/jira/browse/ARROW-5725) - [Crossbow] Port conda recipes to azure pipelines
* [ARROW-5726](https://issues.apache.org/jira/browse/ARROW-5726) - [Java] Implement a common interface for int vectors
* [ARROW-5727](https://issues.apache.org/jira/browse/ARROW-5727) - [Python] [CI] Install pytest-faulthandler before running tests
* [ARROW-5748](https://issues.apache.org/jira/browse/ARROW-5748) - [Packaging][deb] Add support for Debian GNU/Linux buster
* [ARROW-5749](https://issues.apache.org/jira/browse/ARROW-5749) - [Python] Add Python binding for Table::CombineChunks()
* [ARROW-5751](https://issues.apache.org/jira/browse/ARROW-5751) - [Packaging][Python] Python macOS wheels have dynamic dependency on libcares
* [ARROW-5752](https://issues.apache.org/jira/browse/ARROW-5752) - [Java] Improve the performance of ArrowBuf\#setZero
* [ARROW-5755](https://issues.apache.org/jira/browse/ARROW-5755) - [Rust] [Parquet] Add derived clone for Type
* [ARROW-5768](https://issues.apache.org/jira/browse/ARROW-5768) - [Release] There are needless newlines at the end of CHANGELOG.md
* [ARROW-5773](https://issues.apache.org/jira/browse/ARROW-5773) - [R] Clean up documentation before release
* [ARROW-5780](https://issues.apache.org/jira/browse/ARROW-5780) - [C++] Add benchmark for Decimal128 operations
* [ARROW-5782](https://issues.apache.org/jira/browse/ARROW-5782) - [Release] Setup test data for Flight in dev/release/01-perform.sh
* [ARROW-5783](https://issues.apache.org/jira/browse/ARROW-5783) - [Release][C\#] Exclude dummy.git from RAT check
* [ARROW-5785](https://issues.apache.org/jira/browse/ARROW-5785) - [Rust] Rust datafusion implementation should not depend on rustyline
* [ARROW-5787](https://issues.apache.org/jira/browse/ARROW-5787) - [Release][Rust] Use local modules to verify RC
* [ARROW-5793](https://issues.apache.org/jira/browse/ARROW-5793) - [Release] Avoid duplicate known host SSH error in dev/release/03-binary.sh
* [ARROW-5794](https://issues.apache.org/jira/browse/ARROW-5794) - [Release] Skip uploading already uploaded binaries
* [ARROW-5795](https://issues.apache.org/jira/browse/ARROW-5795) - [Release] Add missing waits on uploading binaries
* [ARROW-5796](https://issues.apache.org/jira/browse/ARROW-5796) - [Release][APT] Update expected package list
* [ARROW-5797](https://issues.apache.org/jira/browse/ARROW-5797) - [Release][APT] Update supported distributions
* [ARROW-5818](https://issues.apache.org/jira/browse/ARROW-5818) - [Java][Gandiva] support varlen output vectors
* [ARROW-5820](https://issues.apache.org/jira/browse/ARROW-5820) - [Release] Remove undefined variable check from verify script
* [ARROW-5826](https://issues.apache.org/jira/browse/ARROW-5826) - [Website] Blog post for 0.14.0 release announcement
* [PARQUET-1243](https://issues.apache.org/jira/browse/PARQUET-1243) - [C++] Improve quality of error message for zero-length files, otherwise corrupted files
* [PARQUET-1411](https://issues.apache.org/jira/browse/PARQUET-1411) - [C++] Upgrade to use LogicalType annotations instead of ConvertedType
* [PARQUET-1422](https://issues.apache.org/jira/browse/PARQUET-1422) - [C++] Use Arrow IO interfaces natively rather than current parquet:: wrappers
* [PARQUET-1517](https://issues.apache.org/jira/browse/PARQUET-1517) - [C++] Update cpp crypto package to match signed-off specification
* [PARQUET-1523](https://issues.apache.org/jira/browse/PARQUET-1523) - [C++] Vectorize comparator interface
* [PARQUET-1569](https://issues.apache.org/jira/browse/PARQUET-1569) - [C++] Consolidate testing header files
* [PARQUET-1582](https://issues.apache.org/jira/browse/PARQUET-1582) - [C++] Add ToString method ColumnDescriptor
* [PARQUET-1583](https://issues.apache.org/jira/browse/PARQUET-1583) - [C++] Remove parquet::Vector class
* [PARQUET-1586](https://issues.apache.org/jira/browse/PARQUET-1586) - [C++] Add --dump options to parquet-reader tool to dump def/rep levels
* [PARQUET-1603](https://issues.apache.org/jira/browse/PARQUET-1603) - [C++] rename parquet::LogicalType to parquet::ConvertedType


## Bug Fixes

* [ARROW-61](https://issues.apache.org/jira/browse/ARROW-61) - [Java] Method can return the value bigger than long MAX\_VALUE
* [ARROW-352](https://issues.apache.org/jira/browse/ARROW-352) - [Format] Interval(DAY\_TIME) has no unit
* [ARROW-1837](https://issues.apache.org/jira/browse/ARROW-1837) - [Java] Unable to read unsigned integers outside signed range for bit width in integration tests
* [ARROW-2119](https://issues.apache.org/jira/browse/ARROW-2119) - [C++][Java] Handle Arrow stream with zero record batch
* [ARROW-2136](https://issues.apache.org/jira/browse/ARROW-2136) - [Python] Non-nullable schema fields not checked in conversions from pandas
* [ARROW-2256](https://issues.apache.org/jira/browse/ARROW-2256) - [C++] Fuzzer builds fail out of the box on Ubuntu 16.04 using LLVM apt repos
* [ARROW-2461](https://issues.apache.org/jira/browse/ARROW-2461) - [Python] Build wheels for manylinux2010 tag
* [ARROW-2590](https://issues.apache.org/jira/browse/ARROW-2590) - [Python] Pyspark python\_udf serialization error on grouped map (Amazon EMR)
* [ARROW-3344](https://issues.apache.org/jira/browse/ARROW-3344) - [Python] test\_plasma.py fails (in test\_plasma\_list)
* [ARROW-3399](https://issues.apache.org/jira/browse/ARROW-3399) - [Python] Cannot serialize numpy matrix object
* [ARROW-3650](https://issues.apache.org/jira/browse/ARROW-3650) - [Python] Mixed column indexes are read back as strings
* [ARROW-3801](https://issues.apache.org/jira/browse/ARROW-3801) - [Python] Pandas-Arrow roundtrip makes pd categorical index not writeable
* [ARROW-4021](https://issues.apache.org/jira/browse/ARROW-4021) - [Ruby] Error building red-arrow on msys2
* [ARROW-4076](https://issues.apache.org/jira/browse/ARROW-4076) - [Python] schema validation and filters
* [ARROW-4139](https://issues.apache.org/jira/browse/ARROW-4139) - [Python] Cast Parquet column statistics to unicode if UTF8 ConvertedType is set
* [ARROW-4301](https://issues.apache.org/jira/browse/ARROW-4301) - [Java][Gandiva] Maven snapshot version update does not seem to update Gandiva submodule
* [ARROW-4301](https://issues.apache.org/jira/browse/ARROW-4301) - [Java][Gandiva] Maven snapshot version update does not seem to update Gandiva submodule
* [ARROW-4324](https://issues.apache.org/jira/browse/ARROW-4324) - [Python] Array dtype inference incorrect when created from list of mixed numpy scalars
* [ARROW-4350](https://issues.apache.org/jira/browse/ARROW-4350) - [Python] dtype=object arrays cannot be converted to a list-of-list ListArray
* [ARROW-4433](https://issues.apache.org/jira/browse/ARROW-4433) - [R] Segmentation fault when instantiating arrow::table from data frame
* [ARROW-4447](https://issues.apache.org/jira/browse/ARROW-4447) - [C++] Investigate dynamic linking for libthift
* [ARROW-4516](https://issues.apache.org/jira/browse/ARROW-4516) - [Python] Error while creating a ParquetDataset on a path without \`\_common\_dataset\` but with an empty \`\_tempfile\`
* [ARROW-4523](https://issues.apache.org/jira/browse/ARROW-4523) - [JS] Add row proxy generation benchmark
* [ARROW-4651](https://issues.apache.org/jira/browse/ARROW-4651) - [Format] Flight Location should be more flexible than a (host, port) pair
* [ARROW-4665](https://issues.apache.org/jira/browse/ARROW-4665) - [C++] With glog activated, DCHECK macros are redefined
* [ARROW-4675](https://issues.apache.org/jira/browse/ARROW-4675) - [Python] Error serializing bool ndarray in py2 and deserializing in py3
* [ARROW-4694](https://issues.apache.org/jira/browse/ARROW-4694) - [CI] detect-changes.py is inconsistent
* [ARROW-4723](https://issues.apache.org/jira/browse/ARROW-4723) - [Python] Skip \_files when reading a directory containing parquet files
* [ARROW-4725](https://issues.apache.org/jira/browse/ARROW-4725) - [C++] Dictionary tests disabled under MinGW builds
* [ARROW-4823](https://issues.apache.org/jira/browse/ARROW-4823) - [Python] read\_csv shouldn't close file handles it doesn't own
* [ARROW-4832](https://issues.apache.org/jira/browse/ARROW-4832) - [Python] pandas Index metadata for RangeIndex is incorrect
* [ARROW-4845](https://issues.apache.org/jira/browse/ARROW-4845) - [R] Compiler warnings on Windows MingW64
* [ARROW-4851](https://issues.apache.org/jira/browse/ARROW-4851) - [Java] BoundsChecking.java defaulting behavior for old drill parameter seems off
* [ARROW-4877](https://issues.apache.org/jira/browse/ARROW-4877) - [Plasma] CI failure in test\_plasma\_list
* [ARROW-4884](https://issues.apache.org/jira/browse/ARROW-4884) - [C++] conda-forge thrift-cpp package not available via pkg-config or cmake
* [ARROW-4885](https://issues.apache.org/jira/browse/ARROW-4885) - [Python] read\_csv() can't handle decimal128 columns
* [ARROW-4886](https://issues.apache.org/jira/browse/ARROW-4886) - [Rust] Inconsistent behaviour with casting sliced primitive array to list array
* [ARROW-4923](https://issues.apache.org/jira/browse/ARROW-4923) - Expose setters for Decimal vector that take long and double inputs
* [ARROW-4934](https://issues.apache.org/jira/browse/ARROW-4934) - [Python] Address deprecation notice that will be a bug in Python 3.8
* [ARROW-5019](https://issues.apache.org/jira/browse/ARROW-5019) - [C\#] ArrowStreamWriter doesn't work on a non-seekable stream
* [ARROW-5049](https://issues.apache.org/jira/browse/ARROW-5049) - [Python] org/apache/hadoop/fs/FileSystem class not found when pyarrow FileSystem used in spark
* [ARROW-5051](https://issues.apache.org/jira/browse/ARROW-5051) - [GLib][Gandiva] Test failure in release verification script
* [ARROW-5055](https://issues.apache.org/jira/browse/ARROW-5055) - [Ruby][MSYS2] libparquet needs to be installed in MSYS2 for ruby
* [ARROW-5058](https://issues.apache.org/jira/browse/ARROW-5058) - [Release] 02-source.sh generates e-mail template with wrong links
* [ARROW-5059](https://issues.apache.org/jira/browse/ARROW-5059) - [C++][Gandiva] cbrt\_\* floating point tests can fail due to exact comparisons
* [ARROW-5065](https://issues.apache.org/jira/browse/ARROW-5065) - [Rust] cast kernel does not support casting from Int64
* [ARROW-5068](https://issues.apache.org/jira/browse/ARROW-5068) - [Gandiva][Packaging] Fix gandiva nightly builds after the CMake refactor
* [ARROW-5090](https://issues.apache.org/jira/browse/ARROW-5090) - Parquet linking fails on MacOS due to @rpath in dylib
* [ARROW-5092](https://issues.apache.org/jira/browse/ARROW-5092) - [C\#] Source Link doesn't work with the C\# release script
* [ARROW-5095](https://issues.apache.org/jira/browse/ARROW-5095) - [Flight][C++] Flight DoGet doesn't expose server error message
* [ARROW-5096](https://issues.apache.org/jira/browse/ARROW-5096) - [Packaging][deb] plasma-store-server packages are missing
* [ARROW-5097](https://issues.apache.org/jira/browse/ARROW-5097) - [Packaging][CentOS6] arrow-lib has unresolvable dependencies
* [ARROW-5098](https://issues.apache.org/jira/browse/ARROW-5098) - [Website] Update APT install document for 0.13.0
* [ARROW-5100](https://issues.apache.org/jira/browse/ARROW-5100) - [JS] Writer swaps byte order if buffers share the same underlying ArrayBuffer
* [ARROW-5117](https://issues.apache.org/jira/browse/ARROW-5117) - [Go] Panic when appending zero slices after initializing a builder
* [ARROW-5119](https://issues.apache.org/jira/browse/ARROW-5119) - [Go] invalid Stringer implementation for array.Boolean
* [ARROW-5122](https://issues.apache.org/jira/browse/ARROW-5122) - [Python] pyarrow.parquet.read\_table raises non-file path error when given a windows path to a directory
* [ARROW-5128](https://issues.apache.org/jira/browse/ARROW-5128) - [Packaging][CentOS][Conda] Numpy not found in nightly builds
* [ARROW-5129](https://issues.apache.org/jira/browse/ARROW-5129) - [Rust][Parquet] Column writer bug: check dictionary encoder when adding a new data page
* [ARROW-5130](https://issues.apache.org/jira/browse/ARROW-5130) - [Python] Segfault when importing TensorFlow after Pyarrow
* [ARROW-5132](https://issues.apache.org/jira/browse/ARROW-5132) - [Java] Errors on building gandiva\_jni.dll on Windows with Visual Studio 2017
* [ARROW-5138](https://issues.apache.org/jira/browse/ARROW-5138) - [Python/C++] Row group retrieval doesn't restore index properly
* [ARROW-5140](https://issues.apache.org/jira/browse/ARROW-5140) - [Bug?][Parquet] Can write a jagged array column of strings to disk, but hit \`ArrowNotImplementedError\` on read
* [ARROW-5142](https://issues.apache.org/jira/browse/ARROW-5142) - [CI] Fix conda calls in AppVeyor scripts
* [ARROW-5144](https://issues.apache.org/jira/browse/ARROW-5144) - [Python] ParquetDataset and ParquetPiece not serializable
* [ARROW-5146](https://issues.apache.org/jira/browse/ARROW-5146) - [Dev] Merge script imposes directory name
* [ARROW-5147](https://issues.apache.org/jira/browse/ARROW-5147) - [C++] get an error in building: Could NOT find DoubleConversion
* [ARROW-5148](https://issues.apache.org/jira/browse/ARROW-5148) - [CI] [C++] LLVM-related compile errors
* [ARROW-5149](https://issues.apache.org/jira/browse/ARROW-5149) - [Packaging][Wheel] Pin LLVM to version 7 in windows builds
* [ARROW-5152](https://issues.apache.org/jira/browse/ARROW-5152) - [Python] CMake warnings when building
* [ARROW-5159](https://issues.apache.org/jira/browse/ARROW-5159) - Unable to build benches in arrow crate.
* [ARROW-5160](https://issues.apache.org/jira/browse/ARROW-5160) - [C++] ABORT\_NOT\_OK evalutes expression twice
* [ARROW-5166](https://issues.apache.org/jira/browse/ARROW-5166) - [Python][Parquet] Statistics for uint64 columns may overflow
* [ARROW-5167](https://issues.apache.org/jira/browse/ARROW-5167) - [C++] Upgrade string-view-light to latest
* [ARROW-5169](https://issues.apache.org/jira/browse/ARROW-5169) - [Python] non-nullable fields are converted to nullable in {{Table.from\_pandas}}
* [ARROW-5173](https://issues.apache.org/jira/browse/ARROW-5173) - [Go] handle multiple concatenated streams back-to-back
* [ARROW-5174](https://issues.apache.org/jira/browse/ARROW-5174) - [Go] implement Stringer for DataTypes
* [ARROW-5177](https://issues.apache.org/jira/browse/ARROW-5177) - [Python] ParquetReader.read\_column() doesn't check bounds
* [ARROW-5183](https://issues.apache.org/jira/browse/ARROW-5183) - [CI] MinGW build failures on AppVeyor
* [ARROW-5184](https://issues.apache.org/jira/browse/ARROW-5184) - [Rust] Broken links and other documentation warnings
* [ARROW-5186](https://issues.apache.org/jira/browse/ARROW-5186) - [Plasma] Crash on deleting CUDA memory
* [ARROW-5194](https://issues.apache.org/jira/browse/ARROW-5194) - [C++][Plasma] TEST(PlasmaSerialization, GetReply) is failing
* [ARROW-5195](https://issues.apache.org/jira/browse/ARROW-5195) - [Python] read\_csv ignores null\_values on string types
* [ARROW-5201](https://issues.apache.org/jira/browse/ARROW-5201) - [Python] Import ABCs from collections is deprecated in Python 3.7
* [ARROW-5208](https://issues.apache.org/jira/browse/ARROW-5208) - [Python] Inconsistent resulting type during casting in pa.array() when mask is present
* [ARROW-5214](https://issues.apache.org/jira/browse/ARROW-5214) - [C++] Offline dependency downloader misses some libraries
* [ARROW-5217](https://issues.apache.org/jira/browse/ARROW-5217) - [Rust] [CI] DataFusion test failure
* [ARROW-5232](https://issues.apache.org/jira/browse/ARROW-5232) - [Java] value vector size increases rapidly in case of clear/setSafe loop
* [ARROW-5233](https://issues.apache.org/jira/browse/ARROW-5233) - [Go] migrate to new flatbuffers-v1.11.0
* [ARROW-5237](https://issues.apache.org/jira/browse/ARROW-5237) - [Python] pandas\_version key in pandas metadata no longer populated
* [ARROW-5240](https://issues.apache.org/jira/browse/ARROW-5240) - [C++][CI] cmake\_format 0.5.0 appears to fail the build
* [ARROW-5242](https://issues.apache.org/jira/browse/ARROW-5242) - [C++] Arrow doesn't compile cleanly with Visual Studio 2017 Update 9 or later due to narrowing
* [ARROW-5243](https://issues.apache.org/jira/browse/ARROW-5243) - [Java][Gandiva] Add test for decimal compare functions
* [ARROW-5245](https://issues.apache.org/jira/browse/ARROW-5245) - [C++][CI] Unpin cmake\_format
* [ARROW-5246](https://issues.apache.org/jira/browse/ARROW-5246) - [Go] use Go-1.12 in CI
* [ARROW-5249](https://issues.apache.org/jira/browse/ARROW-5249) - [Java] Flight client doesn't handle auth correctly in some cases
* [ARROW-5253](https://issues.apache.org/jira/browse/ARROW-5253) - [C++] external Snappy fails on Alpine
* [ARROW-5254](https://issues.apache.org/jira/browse/ARROW-5254) - [Flight][Java] DoAction does not support result streams
* [ARROW-5255](https://issues.apache.org/jira/browse/ARROW-5255) - [Java] Implement user-defined data types API
* [ARROW-5260](https://issues.apache.org/jira/browse/ARROW-5260) - [Python][C++] Crash when deserializing from components in a fresh new process
* [ARROW-5274](https://issues.apache.org/jira/browse/ARROW-5274) - [JavaScript] Wrong array type for countBy
* [ARROW-5283](https://issues.apache.org/jira/browse/ARROW-5283) - [C++][Plasma] Server crash when creating an aborted object 3 times
* [ARROW-5285](https://issues.apache.org/jira/browse/ARROW-5285) - [C++][Plasma] GpuProcessHandle is not released when GPU object deleted
* [ARROW-5293](https://issues.apache.org/jira/browse/ARROW-5293) - [C++] Take kernel on DictionaryArray does not preserve ordered flag
* [ARROW-5294](https://issues.apache.org/jira/browse/ARROW-5294) - [CI] setuptools\_scm failures
* [ARROW-5296](https://issues.apache.org/jira/browse/ARROW-5296) - [Java] Sporadic Flight test failures
* [ARROW-5301](https://issues.apache.org/jira/browse/ARROW-5301) - [Python] parquet documentation outdated on nthreads argument
* [ARROW-5304](https://issues.apache.org/jira/browse/ARROW-5304) - [C++] CudaDeviceManager::GetInstance is not thread-safe
* [ARROW-5306](https://issues.apache.org/jira/browse/ARROW-5306) - [CI] [GLib] Disable GTK-Doc
* [ARROW-5308](https://issues.apache.org/jira/browse/ARROW-5308) - [Go] remove deprecated Feather format
* [ARROW-5314](https://issues.apache.org/jira/browse/ARROW-5314) - [Go] Incorrect Printing for String Arrays with Offsets
* [ARROW-5314](https://issues.apache.org/jira/browse/ARROW-5314) - [Go] Incorrect Printing for String Arrays with Offsets
* [ARROW-5318](https://issues.apache.org/jira/browse/ARROW-5318) - [Python] pyarrow hdfs reader overrequests
* [ARROW-5325](https://issues.apache.org/jira/browse/ARROW-5325) - [Archery][Benchmark] Output properly formatted jsonlines from benchmark diff cli command
* [ARROW-5330](https://issues.apache.org/jira/browse/ARROW-5330) - [Python] [CI] Run Python Flight tests on Travis-CI
* [ARROW-5332](https://issues.apache.org/jira/browse/ARROW-5332) - [R] R package fails to build/install: error in dyn.load()
* [ARROW-5348](https://issues.apache.org/jira/browse/ARROW-5348) - [CI] [Java] Gandiva checkstyle failure
* [ARROW-5360](https://issues.apache.org/jira/browse/ARROW-5360) - [Rust] Builds are broken by rustyline on nightly 2019-05-16+
* [ARROW-5362](https://issues.apache.org/jira/browse/ARROW-5362) - [C++] Compression round trip test can cause some sanitizers to to fail
* [ARROW-5371](https://issues.apache.org/jira/browse/ARROW-5371) - [Release] Add tests for dev/release/00-prepare.sh
* [ARROW-5373](https://issues.apache.org/jira/browse/ARROW-5373) - [Java] Add missing details for Gandiva Java Build
* [ARROW-5376](https://issues.apache.org/jira/browse/ARROW-5376) - [C++] Compile failure on gcc 5.4.0
* [ARROW-5383](https://issues.apache.org/jira/browse/ARROW-5383) - [Go] update IPC flatbuf (new Duration type)
* [ARROW-5387](https://issues.apache.org/jira/browse/ARROW-5387) - [Go] properly handle sub-slice of List
* [ARROW-5388](https://issues.apache.org/jira/browse/ARROW-5388) - [Go] use arrow.TypeEqual in array.NewChunked
* [ARROW-5390](https://issues.apache.org/jira/browse/ARROW-5390) - [CI] Job time limit exceeded on Travis
* [ARROW-5397](https://issues.apache.org/jira/browse/ARROW-5397) - Test Flight TLS support
* [ARROW-5398](https://issues.apache.org/jira/browse/ARROW-5398) - [Python] Flight tests broken by URI changes
* [ARROW-5403](https://issues.apache.org/jira/browse/ARROW-5403) - [C++] Test failures not propagated in Windows shared builds
* [ARROW-5411](https://issues.apache.org/jira/browse/ARROW-5411) - [C++][Python] Build error building on Mac OS Mojave
* [ARROW-5412](https://issues.apache.org/jira/browse/ARROW-5412) - [Java] Integration test fails with UnsupportedOperationException
* [ARROW-5419](https://issues.apache.org/jira/browse/ARROW-5419) - [C++] CSV strings\_can\_be\_null option doesn't respect all null\_values
* [ARROW-5421](https://issues.apache.org/jira/browse/ARROW-5421) - [Packaging][Crossbow] Duplicated key in nightly test configuration
* [ARROW-5422](https://issues.apache.org/jira/browse/ARROW-5422) - [CI] [C++] Build failure with Google Benchmark
* [ARROW-5430](https://issues.apache.org/jira/browse/ARROW-5430) - [Python] Can read but not write parquet partitioned on large ints
* [ARROW-5435](https://issues.apache.org/jira/browse/ARROW-5435) - [Java] add test for IntervalYearVector\#getAsStringBuilder
* [ARROW-5437](https://issues.apache.org/jira/browse/ARROW-5437) - [Python] Missing pandas pytest marker from parquet tests
* [ARROW-5446](https://issues.apache.org/jira/browse/ARROW-5446) - [C++] Use cmake header install directory instead of include
* [ARROW-5448](https://issues.apache.org/jira/browse/ARROW-5448) - [CI] MinGW build failures on AppVeyor
* [ARROW-5453](https://issues.apache.org/jira/browse/ARROW-5453) - [C++] Just-released cmake-format 0.5.2 breaks the build
* [ARROW-5455](https://issues.apache.org/jira/browse/ARROW-5455) - [Rust] Build broken by 2019-05-30 Rust nightly
* [ARROW-5456](https://issues.apache.org/jira/browse/ARROW-5456) - [GLib][Plasma] Installed plasma-glib may be used on building document
* [ARROW-5457](https://issues.apache.org/jira/browse/ARROW-5457) - [GLib][Plasma] Environment variable name for test is wrong
* [ARROW-5459](https://issues.apache.org/jira/browse/ARROW-5459) - [Go] implement Stringer for Float16 DataType
* [ARROW-5462](https://issues.apache.org/jira/browse/ARROW-5462) - [Go] support writing zero-length List
* [ARROW-5479](https://issues.apache.org/jira/browse/ARROW-5479) - [Rust] [DataFusion] Use ARROW\_TEST\_DATA instead of relative path for testing
* [ARROW-5487](https://issues.apache.org/jira/browse/ARROW-5487) - [CI] [Python] Failure in docs build
* [ARROW-5493](https://issues.apache.org/jira/browse/ARROW-5493) - [Integration/Go] add Go support for IPC integration tests
* [ARROW-5507](https://issues.apache.org/jira/browse/ARROW-5507) - [Plasma] [CUDA] Compile error
* [ARROW-5514](https://issues.apache.org/jira/browse/ARROW-5514) - [C++] Printer for uint64 shows wrong values
* [ARROW-5517](https://issues.apache.org/jira/browse/ARROW-5517) - [C++] Header collection CMake logic should only consider filename without directory included
* [ARROW-5520](https://issues.apache.org/jira/browse/ARROW-5520) - [C++][Packaging] No NVidia CUDA toolkit on AArch64C
* [ARROW-5521](https://issues.apache.org/jira/browse/ARROW-5521) - [Packaging] License check fails with Apache RAT 0.13
* [ARROW-5528](https://issues.apache.org/jira/browse/ARROW-5528) - Concatenate() crashes when concatenating empty binary arrays.
* [ARROW-5532](https://issues.apache.org/jira/browse/ARROW-5532) - [JS] Field Metadata Not Read
* [ARROW-5551](https://issues.apache.org/jira/browse/ARROW-5551) - [Go] invalid FixedSizeArray representation
* [ARROW-5553](https://issues.apache.org/jira/browse/ARROW-5553) - [Ruby] red-arrow gem does not compile on ruby:2.5 docker image
* [ARROW-5576](https://issues.apache.org/jira/browse/ARROW-5576) - [C++] Flaky thrift\_ep tarball downloads
* [ARROW-5577](https://issues.apache.org/jira/browse/ARROW-5577) - [C++] Link failure due to googletest shared library on Alpine Linux
* [ARROW-5583](https://issues.apache.org/jira/browse/ARROW-5583) - [Java] When the isSet of a NullableValueHolder is 0, the buffer field should not be used
* [ARROW-5584](https://issues.apache.org/jira/browse/ARROW-5584) - [Java] Add import for link reference in FieldReader javadoc
* [ARROW-5589](https://issues.apache.org/jira/browse/ARROW-5589) - [C++][Fuzzing] arrow-ipc-fuzzing-test crash 2354085db0125113f04f7bd23f54b85cca104713
* [ARROW-5592](https://issues.apache.org/jira/browse/ARROW-5592) - [Go] implement Duration array
* [ARROW-5596](https://issues.apache.org/jira/browse/ARROW-5596) - [Python] Flight tests failing on Python 2.7
* [ARROW-5601](https://issues.apache.org/jira/browse/ARROW-5601) - [gandiva] Error when projector with a string field
* [ARROW-5603](https://issues.apache.org/jira/browse/ARROW-5603) - [Python] register pytest markers to avoid warnings
* [ARROW-5605](https://issues.apache.org/jira/browse/ARROW-5605) - [C++][Fuzzing] arrow-ipc-fuzzing-test crash 74aec871d14bb6b07c72ea8f0e8c9f72cbe6b73c
* [ARROW-5606](https://issues.apache.org/jira/browse/ARROW-5606) - [Python] pandas.RangeIndex.\_start/\_stop/\_step are deprecated
* [ARROW-5608](https://issues.apache.org/jira/browse/ARROW-5608) - [C++][parquet] Invalid memory access when using parquet::arrow::ColumnReader
* [ARROW-5615](https://issues.apache.org/jira/browse/ARROW-5615) - [C++] Compilation error due to C++11 string literals on gcc 5.4.0 Ubuntu 16.04
* [ARROW-5616](https://issues.apache.org/jira/browse/ARROW-5616) - [Python] C++ build failure against Python 2.7 headers
* [ARROW-5617](https://issues.apache.org/jira/browse/ARROW-5617) - [C++] thrift\_ep 0.12.0 fails to build when using ARROW\_BOOST\_VENDORED=ON
* [ARROW-5619](https://issues.apache.org/jira/browse/ARROW-5619) - [C++] get\_apache\_mirror.py doesn't work with Python 3.5
* [ARROW-5623](https://issues.apache.org/jira/browse/ARROW-5623) - [CI][GLib] Failed on macOS
* [ARROW-5624](https://issues.apache.org/jira/browse/ARROW-5624) - [C++] -Duriparser\_SOURCE=BUNDLED is broken
* [ARROW-5626](https://issues.apache.org/jira/browse/ARROW-5626) - [C++][Gandiva] Expression cache should consider precision and scale too
* [ARROW-5629](https://issues.apache.org/jira/browse/ARROW-5629) - [C++] Fix Coverity issues
* [ARROW-5631](https://issues.apache.org/jira/browse/ARROW-5631) - [C++] CMake 3.2 build is broken
* [ARROW-5644](https://issues.apache.org/jira/browse/ARROW-5644) - [Python] test\_flight.py::test\_tls\_do\_get appears to hang
* [ARROW-5647](https://issues.apache.org/jira/browse/ARROW-5647) - [Python] Accessing a file from Databricks using pandas read\_parquet using the pyarrow engine fails with : Passed non-file path: /mnt/aa/example.parquet
* [ARROW-5648](https://issues.apache.org/jira/browse/ARROW-5648) - [C++] Build fails on mingw without codecvt
* [ARROW-5654](https://issues.apache.org/jira/browse/ARROW-5654) - [C++] ChunkedArray should validate the types of the arrays
* [ARROW-5657](https://issues.apache.org/jira/browse/ARROW-5657) - [C++] "docker-compose run cpp" broken in master
* [ARROW-5674](https://issues.apache.org/jira/browse/ARROW-5674) - [Python] Missing pandas pytest markers from test\_parquet.py
* [ARROW-5675](https://issues.apache.org/jira/browse/ARROW-5675) - [Doc] Fix typo in documentation describing compile/debug workflow on macOS with Xcode IDE
* [ARROW-5678](https://issues.apache.org/jira/browse/ARROW-5678) - [R][Lint] Fix hadolint docker linting error
* [ARROW-5693](https://issues.apache.org/jira/browse/ARROW-5693) - [Go] skip IPC integration test for Decimal128
* [ARROW-5697](https://issues.apache.org/jira/browse/ARROW-5697) - [GLib] c\_glib/Dockerfile is broken
* [ARROW-5698](https://issues.apache.org/jira/browse/ARROW-5698) - [R] r/Dockerfile docker-compose build is broken
* [ARROW-5709](https://issues.apache.org/jira/browse/ARROW-5709) - [C++] gandiva-date\_time\_test failure on Windows
* [ARROW-5714](https://issues.apache.org/jira/browse/ARROW-5714) - [JS] Inconsistent behavior in Int64Builder with/without BigNum
* [ARROW-5723](https://issues.apache.org/jira/browse/ARROW-5723) - [Gandiva][Crossbow] Builds failing
* [ARROW-5728](https://issues.apache.org/jira/browse/ARROW-5728) - [Python] [CI] Travis-CI failures in test\_jvm.py
* [ARROW-5729](https://issues.apache.org/jira/browse/ARROW-5729) - [Python][Java] ArrowType.Int object has no attribute 'isSigned'
* [ARROW-5730](https://issues.apache.org/jira/browse/ARROW-5730) - [Python][CI] Selectively skip test cases in the dask integration test
* [ARROW-5732](https://issues.apache.org/jira/browse/ARROW-5732) - [C++] macOS builds failing idiosyncratically on master with warnings from pmmintrin.h
* [ARROW-5735](https://issues.apache.org/jira/browse/ARROW-5735) - [C++] Appveyor builds failing persistently in thrift\_ep build
* [ARROW-5737](https://issues.apache.org/jira/browse/ARROW-5737) - [C++][Gandiva] Gandiva not building in manylinux
* [ARROW-5738](https://issues.apache.org/jira/browse/ARROW-5738) - [Crossbow][Conda] OSX package builds are failing with missing intrinsics
* [ARROW-5739](https://issues.apache.org/jira/browse/ARROW-5739) - [CI] Fix docker python build
* [ARROW-5750](https://issues.apache.org/jira/browse/ARROW-5750) - [Java] Java compilation failures on master
* [ARROW-5754](https://issues.apache.org/jira/browse/ARROW-5754) - [C++]Missing override for \~GrpcStreamWriter?
* [ARROW-5765](https://issues.apache.org/jira/browse/ARROW-5765) - [C++] TestDictionary.Validate test is crashed with release build
* [ARROW-5769](https://issues.apache.org/jira/browse/ARROW-5769) - [Java] org.apache.arrow.flight.TestTls is failed via dev/release/00-prepare.sh
* [ARROW-5770](https://issues.apache.org/jira/browse/ARROW-5770) - [C++] Fix -Wpessimizing-move in result.h
* [ARROW-5771](https://issues.apache.org/jira/browse/ARROW-5771) - [Python] Docker python-nopandas job fails
* [ARROW-5774](https://issues.apache.org/jira/browse/ARROW-5774) - [Java][Documentation] Document the need to checkout git submodules for flight
* [ARROW-5781](https://issues.apache.org/jira/browse/ARROW-5781) - [Archery] Ensure benchmark clone accepts remotes in revision
* [ARROW-5791](https://issues.apache.org/jira/browse/ARROW-5791) - [Python] pyarrow.csv.read\_csv hangs + eats all RAM
* [ARROW-5816](https://issues.apache.org/jira/browse/ARROW-5816) - [Release] Parallel curl does not work reliably in verify-release-candidate-sh
* [ARROW-5922](https://issues.apache.org/jira/browse/ARROW-5922) - [Python] Unable to connect to HDFS from a worker/data node on a Kerberized cluster using pyarrow' hdfs API
* [PARQUET-1402](https://issues.apache.org/jira/browse/PARQUET-1402) - [C++] incorrect calculation column start offset for files created by parquet-mr 1.8.1
* [PARQUET-1405](https://issues.apache.org/jira/browse/PARQUET-1405) - [C++] 'Couldn't deserialize thrift' error when reading large binary column
* [PARQUET-1405](https://issues.apache.org/jira/browse/PARQUET-1405) - [C++] 'Couldn't deserialize thrift' error when reading large binary column
* [PARQUET-1565](https://issues.apache.org/jira/browse/PARQUET-1565) - [C++] SEGV in FromParquetSchema with corrupt file from PARQUET-1481
* [PARQUET-1571](https://issues.apache.org/jira/browse/PARQUET-1571) - [C++] Can't read data from parquet file in C++ library
* [PARQUET-1574](https://issues.apache.org/jira/browse/PARQUET-1574) - [C++] parquet-encoding-test failed with msvc
* [PARQUET-1581](https://issues.apache.org/jira/browse/PARQUET-1581) - [C++] Fix undefined behavior in encoding.cc when num\_dictionary\_values is 0.



# Apache Arrow 0.13.0 (2019-04-01)

## Bug Fixes

* [ARROW-295](https://issues.apache.org/jira/browse/ARROW-295) - Create DOAP File
* [ARROW-1171](https://issues.apache.org/jira/browse/ARROW-1171) - [C++] Segmentation faults on Fedora 24 with pyarrow-manylinux1 and self-compiled turbodbc
* [ARROW-2392](https://issues.apache.org/jira/browse/ARROW-2392) - [Python] pyarrow RecordBatchStreamWriter allows writing batches with different schemas
* [ARROW-2399](https://issues.apache.org/jira/browse/ARROW-2399) - [Rust] Builder<T\> should not provide a set() method
* [ARROW-2598](https://issues.apache.org/jira/browse/ARROW-2598) - [Python]  table.to\_pandas segfault
* [ARROW-3086](https://issues.apache.org/jira/browse/ARROW-3086) - [GLib] GISCAN fails due to conda-shipped openblas
* [ARROW-3096](https://issues.apache.org/jira/browse/ARROW-3096) - [Python] Update Python source build instructions given Anaconda/conda-forge toolchain migration
* [ARROW-3133](https://issues.apache.org/jira/browse/ARROW-3133) - [C++] Logical boolean kernels in kernels/boolean.cc cannot write into preallocated memory
* [ARROW-3133](https://issues.apache.org/jira/browse/ARROW-3133) - [C++] Logical boolean kernels in kernels/boolean.cc cannot write into preallocated memory
* [ARROW-3208](https://issues.apache.org/jira/browse/ARROW-3208) - [C++] Segmentation fault when casting dictionary to numeric with nullptr valid\_bitmap
* [ARROW-3426](https://issues.apache.org/jira/browse/ARROW-3426) - [CI] Java integration test very verbose
* [ARROW-3564](https://issues.apache.org/jira/browse/ARROW-3564) - [Python] writing version 2.0 parquet format with dictionary encoding enabled
* [ARROW-3578](https://issues.apache.org/jira/browse/ARROW-3578) - [Release] Address spurious Apache RAT failures in source release script
* [ARROW-3593](https://issues.apache.org/jira/browse/ARROW-3593) - [R] CI builds failing due to GitHub API rate limits
* [ARROW-3606](https://issues.apache.org/jira/browse/ARROW-3606) - [Python] flake8 fails on Crossbow
* [ARROW-3669](https://issues.apache.org/jira/browse/ARROW-3669) - [Python] Convert big-endian numbers or raise error in pyarrow.array
* [ARROW-3843](https://issues.apache.org/jira/browse/ARROW-3843) - [Python] Writing Parquet file from empty table created with Table.from\_pandas(..., preserve\_index=False) fails
* [ARROW-3923](https://issues.apache.org/jira/browse/ARROW-3923) - [Java] JDBC-to-Arrow Conversion: Unnecessary Calendar Requirement
* [ARROW-4007](https://issues.apache.org/jira/browse/ARROW-4007) - [Java][Plasma] Plasma JNI tests failing
* [ARROW-4050](https://issues.apache.org/jira/browse/ARROW-4050) - [Python][Parquet] core dump on reading parquet file
* [ARROW-4081](https://issues.apache.org/jira/browse/ARROW-4081) - [Go] Sum methods on Mac OS X panic when the array is empty
* [ARROW-4104](https://issues.apache.org/jira/browse/ARROW-4104) - [Java] race in AllocationManager during release
* [ARROW-4108](https://issues.apache.org/jira/browse/ARROW-4108) - [Python/Java] Spark integration tests do not work
* [ARROW-4117](https://issues.apache.org/jira/browse/ARROW-4117) - [Python] "asv dev" command fails with latest revision
* [ARROW-4140](https://issues.apache.org/jira/browse/ARROW-4140) - [C++][Gandiva] Compiled LLVM bitcode file path may result in libraries being non-relocatable
* [ARROW-4145](https://issues.apache.org/jira/browse/ARROW-4145) - [C++] Find Windows-compatible strptime implementation
* [ARROW-4181](https://issues.apache.org/jira/browse/ARROW-4181) - [Python] TestConvertStructTypes.test\_from\_numpy\_large failing
* [ARROW-4192](https://issues.apache.org/jira/browse/ARROW-4192) - "./dev/run\_docker\_compose.sh" is out of date
* [ARROW-4213](https://issues.apache.org/jira/browse/ARROW-4213) - [Flight] C++ and Java implementations are incompatible
* [ARROW-4244](https://issues.apache.org/jira/browse/ARROW-4244) - Clarify language around padding/alignment
* [ARROW-4250](https://issues.apache.org/jira/browse/ARROW-4250) - [C++][Gandiva] Use approximate comparisons for floating point numbers in gandiva-projector-test
* [ARROW-4252](https://issues.apache.org/jira/browse/ARROW-4252) - [C++] Status error context strings missing lines of code
* [ARROW-4253](https://issues.apache.org/jira/browse/ARROW-4253) - [GLib] Cannot use non-system Boost specified with $BOOST\_ROOT
* [ARROW-4254](https://issues.apache.org/jira/browse/ARROW-4254) - [C++] Gandiva tests fail to compile with Boost in Ubuntu 14.04 apt
* [ARROW-4255](https://issues.apache.org/jira/browse/ARROW-4255) - [C++] Schema::GetFieldIndex is not thread-safe
* [ARROW-4261](https://issues.apache.org/jira/browse/ARROW-4261) - [C++] CMake paths for IPC, Flight, Thrift, and Plasma don't support using Arrow as a subproject
* [ARROW-4264](https://issues.apache.org/jira/browse/ARROW-4264) - [C++] Document why DCHECKs are used in kernels
* [ARROW-4267](https://issues.apache.org/jira/browse/ARROW-4267) - [Python/C++][Parquet] Segfault when reading rowgroups with duplicated columns
* [ARROW-4274](https://issues.apache.org/jira/browse/ARROW-4274) - [Gandiva] static jni library broken after decimal changes
* [ARROW-4275](https://issues.apache.org/jira/browse/ARROW-4275) - [C++] gandiva-decimal\_single\_test extremely slow
* [ARROW-4280](https://issues.apache.org/jira/browse/ARROW-4280) - [C++][Documentation] It looks like flex and bison are required for parquet
* [ARROW-4282](https://issues.apache.org/jira/browse/ARROW-4282) - [Rust] builder benchmark is broken
* [ARROW-4284](https://issues.apache.org/jira/browse/ARROW-4284) - [C\#] File / Stream serialization fails due to type mismatch / missing footer
* [ARROW-4295](https://issues.apache.org/jira/browse/ARROW-4295) - [Plasma] Incorrect log message when evicting objects
* [ARROW-4296](https://issues.apache.org/jira/browse/ARROW-4296) - [Plasma] Starting Plasma store with use\_one\_memory\_mapped\_file enabled crashes due to improper memory alignment
* [ARROW-4308](https://issues.apache.org/jira/browse/ARROW-4308) - [Python] pyarrow has a hard dependency on pandas
* [ARROW-4311](https://issues.apache.org/jira/browse/ARROW-4311) - [Python] Regression on pq.ParquetWriter incorrectly handling source string
* [ARROW-4312](https://issues.apache.org/jira/browse/ARROW-4312) - [C++] Lint doesn't work anymore ("[Errno 24] Too many open files")
* [ARROW-4319](https://issues.apache.org/jira/browse/ARROW-4319) - plasma/store.h pulls ins flatbuffer dependency
* [ARROW-4320](https://issues.apache.org/jira/browse/ARROW-4320) - [C++] Add tests for non-contiguous tensors
* [ARROW-4322](https://issues.apache.org/jira/browse/ARROW-4322) - [CI] docker nightlies fails after conda-forge compiler migration
* [ARROW-4323](https://issues.apache.org/jira/browse/ARROW-4323) - [Packaging] Fix failing OSX clang conda forge builds
* [ARROW-4326](https://issues.apache.org/jira/browse/ARROW-4326) - [C++] Development instructions in python/development.rst will not work for many Linux distros with new conda-forge toolchain
* [ARROW-4327](https://issues.apache.org/jira/browse/ARROW-4327) - [Python] Add requirements-build.txt file to simplify setting up Python build environment
* [ARROW-4328](https://issues.apache.org/jira/browse/ARROW-4328) - Make R build compatible with DARROW\_TENSORFLOW=ON
* [ARROW-4329](https://issues.apache.org/jira/browse/ARROW-4329) - Python should include the parquet headers
* [ARROW-4342](https://issues.apache.org/jira/browse/ARROW-4342) - [Gandiva][Java] spurious failures in projector cache test
* [ARROW-4347](https://issues.apache.org/jira/browse/ARROW-4347) - [Python] Run Python Travis CI unit tests on Linux when Java codebase changed
* [ARROW-4349](https://issues.apache.org/jira/browse/ARROW-4349) - [C++] Build all benchmarks on Windows without failing
* [ARROW-4351](https://issues.apache.org/jira/browse/ARROW-4351) - [C++] Fail to build with static parquet
* [ARROW-4355](https://issues.apache.org/jira/browse/ARROW-4355) - [C++] test-util functions are no longer part of libarrow
* [ARROW-4360](https://issues.apache.org/jira/browse/ARROW-4360) - [C++] Query homebrew for Thrift
* [ARROW-4364](https://issues.apache.org/jira/browse/ARROW-4364) - [C++] Fix -weverything -wextra compilation errors
* [ARROW-4366](https://issues.apache.org/jira/browse/ARROW-4366) - [Docs] Change extension from format/README.md to format/README.rst
* [ARROW-4367](https://issues.apache.org/jira/browse/ARROW-4367) - [C++] StringDictionaryBuilder segfaults on Finish with only null entries
* [ARROW-4368](https://issues.apache.org/jira/browse/ARROW-4368) - Bintray repository signature verification fails
* [ARROW-4370](https://issues.apache.org/jira/browse/ARROW-4370) - [Python] Table to pandas conversion fails for list of bool
* [ARROW-4374](https://issues.apache.org/jira/browse/ARROW-4374) - [C++] DictionaryBuilder does not correctly report length and null\_count
* [ARROW-4381](https://issues.apache.org/jira/browse/ARROW-4381) - [Docker] docker-compose build lint fails
* [ARROW-4382](https://issues.apache.org/jira/browse/ARROW-4382) - [C++] Improve new cpplint output readability
* [ARROW-4384](https://issues.apache.org/jira/browse/ARROW-4384) - [C++] Running "format" target on new Windows 10 install opens "how do you want to open this file" dialog
* [ARROW-4385](https://issues.apache.org/jira/browse/ARROW-4385) - [Python] default\_version of a release should not include SNAPSHOT
* [ARROW-4389](https://issues.apache.org/jira/browse/ARROW-4389) - [R] Installing clang-tools in CI is failing on trusty
* [ARROW-4395](https://issues.apache.org/jira/browse/ARROW-4395) - ts-node throws type error running \`bin/arrow2csv.js\`
* [ARROW-4400](https://issues.apache.org/jira/browse/ARROW-4400) - [CI] install of clang tools failing
* [ARROW-4403](https://issues.apache.org/jira/browse/ARROW-4403) - [Rust] CI fails due to formatting errors
* [ARROW-4404](https://issues.apache.org/jira/browse/ARROW-4404) - [CI] AppVeyor toolchain build does not build anything
* [ARROW-4407](https://issues.apache.org/jira/browse/ARROW-4407) - [C++] ExternalProject\_Add does not capture CC/CXX correctly
* [ARROW-4410](https://issues.apache.org/jira/browse/ARROW-4410) - [C++] Fix InvertKernel edge cases
* [ARROW-4413](https://issues.apache.org/jira/browse/ARROW-4413) - [Python] pyarrow.hdfs.connect() failing
* [ARROW-4414](https://issues.apache.org/jira/browse/ARROW-4414) - [C++] Stop using cmake COMMAND\_EXPAND\_LISTS because it breaks package builds for older distros
* [ARROW-4417](https://issues.apache.org/jira/browse/ARROW-4417) - [C++] Doc build broken
* [ARROW-4420](https://issues.apache.org/jira/browse/ARROW-4420) - [INTEGRATION] Make spark integration test pass and test against spark's master branch
* [ARROW-4421](https://issues.apache.org/jira/browse/ARROW-4421) - [Flight][C++] Handle large Flight data messages
* [ARROW-4434](https://issues.apache.org/jira/browse/ARROW-4434) - [Python] Cannot create empty StructArray via pa.StructArray.from\_arrays
* [ARROW-4440](https://issues.apache.org/jira/browse/ARROW-4440) - [C++] Fix flatbuffers build using msvc
* [ARROW-4457](https://issues.apache.org/jira/browse/ARROW-4457) - [Python] Cannot create Decimal128 array using integers
* [ARROW-4469](https://issues.apache.org/jira/browse/ARROW-4469) - [Python][C++] CI Failing for Python 2.7 and 3.6 with valgrind
* [ARROW-4471](https://issues.apache.org/jira/browse/ARROW-4471) - [C++] Pass AR and RANLIB to all external projects
* [ARROW-4474](https://issues.apache.org/jira/browse/ARROW-4474) - [Flight] FlightInfo should use signed integer types for payload size
* [ARROW-4480](https://issues.apache.org/jira/browse/ARROW-4480) - [Python] Drive letter removed when writing parquet file
* [ARROW-4487](https://issues.apache.org/jira/browse/ARROW-4487) - [C++] Appveyor toolchain build does not actually build the project
* [ARROW-4494](https://issues.apache.org/jira/browse/ARROW-4494) - [Java] arrow-jdbc JAR is not uploaded on release
* [ARROW-4496](https://issues.apache.org/jira/browse/ARROW-4496) - [CI] CI failing for python Xcode 7.3
* [ARROW-4498](https://issues.apache.org/jira/browse/ARROW-4498) - [Plasma] Plasma fails building with CUDA enabled
* [ARROW-4500](https://issues.apache.org/jira/browse/ARROW-4500) - [C++] librt and pthread hacks can cause linking problems
* [ARROW-4501](https://issues.apache.org/jira/browse/ARROW-4501) - [C++] Unique returns non-unique strings
* [ARROW-4525](https://issues.apache.org/jira/browse/ARROW-4525) - [Rust] [Parquet] Convert ArrowError to ParquetError
* [ARROW-4527](https://issues.apache.org/jira/browse/ARROW-4527) - [Packaging] Update linux packaging tasks to align with the LLVM 7 migration
* [ARROW-4532](https://issues.apache.org/jira/browse/ARROW-4532) - [Java] varchar value buffer much larger than expected
* [ARROW-4533](https://issues.apache.org/jira/browse/ARROW-4533) - [Python] Document how to run hypothesis tests
* [ARROW-4535](https://issues.apache.org/jira/browse/ARROW-4535) - [C++] Fix MakeBuilder to preserve ListType's field name
* [ARROW-4536](https://issues.apache.org/jira/browse/ARROW-4536) - Add data\_type argument in garrow\_list\_array\_new
* [ARROW-4538](https://issues.apache.org/jira/browse/ARROW-4538) - [PYTHON] Remove index column from subschema in write\_to\_dataframe
* [ARROW-4549](https://issues.apache.org/jira/browse/ARROW-4549) - [C++] Can't build benchmark code on CUDA enabled build
* [ARROW-4550](https://issues.apache.org/jira/browse/ARROW-4550) - [JS] Fix AMD pattern
* [ARROW-4559](https://issues.apache.org/jira/browse/ARROW-4559) - [Python] pyarrow can't read/write filenames with special characters
* [ARROW-4563](https://issues.apache.org/jira/browse/ARROW-4563) - [Python] pa.decimal128 should validate inputs
* [ARROW-4571](https://issues.apache.org/jira/browse/ARROW-4571) - [Format] Tensor.fbs file has multiple root\_type declarations
* [ARROW-4573](https://issues.apache.org/jira/browse/ARROW-4573) - [Python] Add Flight unit tests
* [ARROW-4576](https://issues.apache.org/jira/browse/ARROW-4576) - [Python] Benchmark failures
* [ARROW-4577](https://issues.apache.org/jira/browse/ARROW-4577) - [C++] Interface link libraries declared on arrow\_shared target that are actually non-interface
* [ARROW-4581](https://issues.apache.org/jira/browse/ARROW-4581) - [C++] gbenchmark\_ep is a dependency of unit tests when ARROW\_BUILD\_BENCHMARKS=ON
* [ARROW-4582](https://issues.apache.org/jira/browse/ARROW-4582) - [C++/Python] Memory corruption on Pandas-\>Arrow conversion
* [ARROW-4584](https://issues.apache.org/jira/browse/ARROW-4584) - [Python] Add built wheel to manylinux1 dockerignore.
* [ARROW-4585](https://issues.apache.org/jira/browse/ARROW-4585) - [C++] Dependency of Flight C++ sources on generated protobuf is not respected
* [ARROW-4587](https://issues.apache.org/jira/browse/ARROW-4587) - Flight C++ DoPut segfaults
* [ARROW-4597](https://issues.apache.org/jira/browse/ARROW-4597) - [C++] Targets for system Google Mock shared library are missing
* [ARROW-4601](https://issues.apache.org/jira/browse/ARROW-4601) - [Python] Master build is broken due to missing licence for .dockerignore
* [ARROW-4606](https://issues.apache.org/jira/browse/ARROW-4606) - [Rust] [DataFusion] FilterRelation created RecordBatch with empty schema
* [ARROW-4608](https://issues.apache.org/jira/browse/ARROW-4608) - [C++] cmake script assumes that double-conversion installs static libs
* [ARROW-4617](https://issues.apache.org/jira/browse/ARROW-4617) - [C++] Support double-conversion<3.1
* [ARROW-4624](https://issues.apache.org/jira/browse/ARROW-4624) - [C++] Linker errors when building benchmarks
* [ARROW-4629](https://issues.apache.org/jira/browse/ARROW-4629) - [Python] Pandas to arrow conversion slowed down by local imports
* [ARROW-4635](https://issues.apache.org/jira/browse/ARROW-4635) - [Java] StructVector growing validity buffer unnecessarily
* [ARROW-4639](https://issues.apache.org/jira/browse/ARROW-4639) - [CI] Crossbow build failing for Gandiva jars
* [ARROW-4641](https://issues.apache.org/jira/browse/ARROW-4641) - [C++] Flight builds complain of -Wstrict-aliasing
* [ARROW-4642](https://issues.apache.org/jira/browse/ARROW-4642) - [R] Change \`f\` to \`file\` in \`read\_parquet\_file()\`
* [ARROW-4653](https://issues.apache.org/jira/browse/ARROW-4653) - [C++] decimal multiply broken when both args are negative
* [ARROW-4654](https://issues.apache.org/jira/browse/ARROW-4654) - [C++] Implicit Flight target dependencies cause compilation failure
* [ARROW-4657](https://issues.apache.org/jira/browse/ARROW-4657) - [Release] gbenchmark should not be needed for verification
* [ARROW-4658](https://issues.apache.org/jira/browse/ARROW-4658) - [C++] Shared gflags is also a run-time conda requirement
* [ARROW-4659](https://issues.apache.org/jira/browse/ARROW-4659) - [CI] ubuntu/debian nightlies fail because of missing gandiva files
* [ARROW-4660](https://issues.apache.org/jira/browse/ARROW-4660) - [C++] gflags fails to build due to CMake error
* [ARROW-4664](https://issues.apache.org/jira/browse/ARROW-4664) - [C++] DCHECK macro conditions are evaluated in release builds
* [ARROW-4669](https://issues.apache.org/jira/browse/ARROW-4669) - [Java] No Bounds checking on ArrowBuf.slice
* [ARROW-4672](https://issues.apache.org/jira/browse/ARROW-4672) - [C++] clang-7 matrix entry is build using gcc
* [ARROW-4680](https://issues.apache.org/jira/browse/ARROW-4680) - [CI] [Rust] Travis CI builds fail with latest Rust 1.34.0-nightly (2019-02-25)
* [ARROW-4684](https://issues.apache.org/jira/browse/ARROW-4684) - [Python] CI failures in test\_cython.py
* [ARROW-4687](https://issues.apache.org/jira/browse/ARROW-4687) - [Python] FlightServerBase.run should exit on Ctrl-C
* [ARROW-4688](https://issues.apache.org/jira/browse/ARROW-4688) - [C++][Parquet] 16MB limit on (nested) column chunk prevents tuning row\_group\_size
* [ARROW-4696](https://issues.apache.org/jira/browse/ARROW-4696) - Verify release script is over optimist with CUDA detection
* [ARROW-4699](https://issues.apache.org/jira/browse/ARROW-4699) - [C++] json parser should not rely on null terminated buffers
* [ARROW-4704](https://issues.apache.org/jira/browse/ARROW-4704) - [CI][GLib] Plasma test is flaky
* [ARROW-4710](https://issues.apache.org/jira/browse/ARROW-4710) - [C++][R] New linting script skip files with "cpp" extension
* [ARROW-4712](https://issues.apache.org/jira/browse/ARROW-4712) - [C++][CI] Clang7 Valgrind complains when not move shared\_ptr
* [ARROW-4721](https://issues.apache.org/jira/browse/ARROW-4721) - [Rust] [DataFusion] Propagate schema in filter
* [ARROW-4724](https://issues.apache.org/jira/browse/ARROW-4724) - [C++] Python not being built nor test under MinGW builds
* [ARROW-4728](https://issues.apache.org/jira/browse/ARROW-4728) - [JS] Failing test Table\#assign with a zero-length Null column round-trips through serialization
* [ARROW-4737](https://issues.apache.org/jira/browse/ARROW-4737) - [C\#] tests are not running in CI
* [ARROW-4744](https://issues.apache.org/jira/browse/ARROW-4744) - [CI][C++] Mingw32 builds failing
* [ARROW-4750](https://issues.apache.org/jira/browse/ARROW-4750) - [C++] RapidJSON triggers Wclass-memaccess on GCC 8+
* [ARROW-4760](https://issues.apache.org/jira/browse/ARROW-4760) - [C++] protobuf 3.7 defines EXPECT\_OK that clashes with Arrow's macro
* [ARROW-4766](https://issues.apache.org/jira/browse/ARROW-4766) - [C++] Casting empty boolean array causes segfault
* [ARROW-4767](https://issues.apache.org/jira/browse/ARROW-4767) - [C\#] ArrowStreamReader crashes while reading the end of a stream
* [ARROW-4768](https://issues.apache.org/jira/browse/ARROW-4768) - [C++][CI] arrow-test-array sometimes gets stuck in MinGW build
* [ARROW-4774](https://issues.apache.org/jira/browse/ARROW-4774) - [C++][Parquet] Call Table::Validate when writing a table
* [ARROW-4775](https://issues.apache.org/jira/browse/ARROW-4775) - [Website] Site navbar cannot be expanded
* [ARROW-4783](https://issues.apache.org/jira/browse/ARROW-4783) - [C++][CI] Mingw32 builds sometimes timeout
* [ARROW-4793](https://issues.apache.org/jira/browse/ARROW-4793) - [Ruby] Suppress unused variable warning
* [ARROW-4796](https://issues.apache.org/jira/browse/ARROW-4796) - [Flight][Python] segfault in simple server implementation
* [ARROW-4802](https://issues.apache.org/jira/browse/ARROW-4802) - [Python] Hadoop classpath discovery broken HADOOP\_HOME is a symlink
* [ARROW-4807](https://issues.apache.org/jira/browse/ARROW-4807) - [Rust] Fix csv\_writer benchmark
* [ARROW-4811](https://issues.apache.org/jira/browse/ARROW-4811) - [C++] An incorrect dependency leads "ninja" to re-evaluate steps unnecessarily on subsequent calls
* [ARROW-4813](https://issues.apache.org/jira/browse/ARROW-4813) - [Ruby] Add tests for \#== and \#!=
* [ARROW-4820](https://issues.apache.org/jira/browse/ARROW-4820) - [Python] hadoop class path derived not correct
* [ARROW-4822](https://issues.apache.org/jira/browse/ARROW-4822) - [C++/Python] pyarrow.Table.equals segmentation fault on None
* [ARROW-4828](https://issues.apache.org/jira/browse/ARROW-4828) - [Python] manylinux1 docker-compose context should be python/manylinux1
* [ARROW-4850](https://issues.apache.org/jira/browse/ARROW-4850) - [CI] Integration test failures do not fail the Travis CI build
* [ARROW-4853](https://issues.apache.org/jira/browse/ARROW-4853) - [Rust] Array slice doesn't work on ListArray and StructArray
* [ARROW-4857](https://issues.apache.org/jira/browse/ARROW-4857) - [C++/Python/CI] docker-compose in manylinux1 crossbow jobs too old
* [ARROW-4866](https://issues.apache.org/jira/browse/ARROW-4866) - [C++] zstd ExternalProject failing on Windows
* [ARROW-4867](https://issues.apache.org/jira/browse/ARROW-4867) - [Python] Table.from\_pandas() column order not respected
* [ARROW-4869](https://issues.apache.org/jira/browse/ARROW-4869) - [C++] Use of gmock fails in compute/kernels/util-internal-test.cc
* [ARROW-4870](https://issues.apache.org/jira/browse/ARROW-4870) - [Ruby] gemspec has wrong msys2 dependency listed
* [ARROW-4871](https://issues.apache.org/jira/browse/ARROW-4871) - [Flight][Java] Handle large Flight messages
* [ARROW-4872](https://issues.apache.org/jira/browse/ARROW-4872) - [Python] Keep backward compatibility for ParquetDatasetPiece
* [ARROW-4879](https://issues.apache.org/jira/browse/ARROW-4879) - [C++] cmake can't use conda's flatbuffers
* [ARROW-4881](https://issues.apache.org/jira/browse/ARROW-4881) - [Python] bundle\_zlib CMake function still uses ARROW\_BUILD\_TOOLCHAIN
* [ARROW-4900](https://issues.apache.org/jira/browse/ARROW-4900) - mingw-w64 < 5 does not have \_\_cpuidex
* [ARROW-4903](https://issues.apache.org/jira/browse/ARROW-4903) - [C++] Building tests using only static libs not possible
* [ARROW-4906](https://issues.apache.org/jira/browse/ARROW-4906) - [Format] Fix document to describe that SparseMatrixIndexCSR assumes indptr is sorted for each row
* [ARROW-4918](https://issues.apache.org/jira/browse/ARROW-4918) - [C++] Add cmake-format to pre-commit
* [ARROW-4928](https://issues.apache.org/jira/browse/ARROW-4928) - [Python] Hypothesis test failures
* [ARROW-4931](https://issues.apache.org/jira/browse/ARROW-4931) - [C++] CMake fails on gRPC ExternalProject
* [ARROW-4938](https://issues.apache.org/jira/browse/ARROW-4938) - [Glib] Undefined symbols error occurred when GIR file is being generated.
* [ARROW-4942](https://issues.apache.org/jira/browse/ARROW-4942) - [Ruby] Remove needless omits
* [ARROW-4948](https://issues.apache.org/jira/browse/ARROW-4948) - [JS] Nightly test failing with "Cannot assign to read only property"
* [ARROW-4950](https://issues.apache.org/jira/browse/ARROW-4950) - [C++] Thirdparty CMake error get\_target\_property() called with non-existent target LZ4::lz4
* [ARROW-4952](https://issues.apache.org/jira/browse/ARROW-4952) - [C++] Equals / ApproxEquals behaviour undefined on FP NaNs
* [ARROW-4953](https://issues.apache.org/jira/browse/ARROW-4953) - [Ruby] Not loading libarrow-glib
* [ARROW-4954](https://issues.apache.org/jira/browse/ARROW-4954) - [Python] test failure with Flight enabled
* [ARROW-4958](https://issues.apache.org/jira/browse/ARROW-4958) - [C++] Purely static linking broken
* [ARROW-4961](https://issues.apache.org/jira/browse/ARROW-4961) - [C++][Python] Add GTest\_SOURCE=BUNDLED to relevant build docs that use conda-forge toolchain
* [ARROW-4962](https://issues.apache.org/jira/browse/ARROW-4962) - [C++] Warning level to CHECKIN can't compile on modern GCC
* [ARROW-4976](https://issues.apache.org/jira/browse/ARROW-4976) - [JS] RecordBatchReader should reset its Node/DOM streams
* [ARROW-4982](https://issues.apache.org/jira/browse/ARROW-4982) - [GLib][CI] Run tests on AppVeyor
* [ARROW-4984](https://issues.apache.org/jira/browse/ARROW-4984) - [Flight][C++] Flight server segfaults when port is in use
* [ARROW-4986](https://issues.apache.org/jira/browse/ARROW-4986) - [CI] Travis fails to install llvm@7
* [ARROW-4989](https://issues.apache.org/jira/browse/ARROW-4989) - [C++] Builds fails to find Ubuntu-packaged re2 library
* [ARROW-4991](https://issues.apache.org/jira/browse/ARROW-4991) - [CI] Bump travis node version to 11.12
* [ARROW-4997](https://issues.apache.org/jira/browse/ARROW-4997) - [C\#] ArrowStreamReader doesn't consume whole stream and doesn't implement sync read
* [ARROW-5009](https://issues.apache.org/jira/browse/ARROW-5009) - [C++] Cleanup using to std::\* in files
* [ARROW-5010](https://issues.apache.org/jira/browse/ARROW-5010) - [Release] Fix release script with llvm-7
* [ARROW-5012](https://issues.apache.org/jira/browse/ARROW-5012) - [C++] "testing" headers not installed
* [ARROW-5023](https://issues.apache.org/jira/browse/ARROW-5023) - [Release] Default value syntax in shell is wrong
* [ARROW-5024](https://issues.apache.org/jira/browse/ARROW-5024) - [Release] crossbow.py --arrow-version causes missing variable error
* [ARROW-5025](https://issues.apache.org/jira/browse/ARROW-5025) - [Python][Packaging] wheel for Windows are broken
* [ARROW-5026](https://issues.apache.org/jira/browse/ARROW-5026) - [Python][Packaging] conda package on non Windows is broken
* [ARROW-5029](https://issues.apache.org/jira/browse/ARROW-5029) - [C++] Compilation warnings in release mode
* [ARROW-5031](https://issues.apache.org/jira/browse/ARROW-5031) - [Dev] Release verification script does not run CUDA tests in Python
* [ARROW-5042](https://issues.apache.org/jira/browse/ARROW-5042) - [Release] Wrong ARROW\_DEPENDENCY\_SOURCE in verification script
* [ARROW-5043](https://issues.apache.org/jira/browse/ARROW-5043) - [Release][Ruby] red-arrow dependency can't be resolve in verification script
* [ARROW-5044](https://issues.apache.org/jira/browse/ARROW-5044) - [Release][Rust] Format error in verification script
* [ARROW-5046](https://issues.apache.org/jira/browse/ARROW-5046) - [Release][C++] Plasma test is fragile in verification script
* [ARROW-5047](https://issues.apache.org/jira/browse/ARROW-5047) - [Release] Always set up parquet-testing in verification script
* [ARROW-5048](https://issues.apache.org/jira/browse/ARROW-5048) - [Release][Rust] arrow-testing is missing in verification script
* [ARROW-5050](https://issues.apache.org/jira/browse/ARROW-5050) - [C++] cares\_ep should build before grpc\_ep
* [ARROW-5087](https://issues.apache.org/jira/browse/ARROW-5087) - [Debian] APT repository no longer contains libarrow-dev
* [ARROW-5658](https://issues.apache.org/jira/browse/ARROW-5658) - [JAVA] Provide ability to resync VectorSchemaRoot if types change
* [PARQUET-1482](https://issues.apache.org/jira/browse/PARQUET-1482) - [C++] Unable to read data from parquet file generated with parquetjs
* [PARQUET-1494](https://issues.apache.org/jira/browse/PARQUET-1494) - [C++] Can't access parquet statistics on binary columns
* [PARQUET-1532](https://issues.apache.org/jira/browse/PARQUET-1532) - [C++] Can't build column reader test with MinGW


## New Features and Improvements

* [ARROW-47](https://issues.apache.org/jira/browse/ARROW-47) - [C++] Consider adding a scalar type object model
* [ARROW-331](https://issues.apache.org/jira/browse/ARROW-331) - [Python] Timeline for dropping Python 2.7 support
* [ARROW-549](https://issues.apache.org/jira/browse/ARROW-549) - [C++] Add function to concatenate like-typed arrays
* [ARROW-572](https://issues.apache.org/jira/browse/ARROW-572) - [C++] Apply visitor pattern in IPC metadata
* [ARROW-585](https://issues.apache.org/jira/browse/ARROW-585) - [C++] Define public API for user-defined data types
* [ARROW-694](https://issues.apache.org/jira/browse/ARROW-694) - [C++] Build JSON "scanner" for reading record batches from line-delimited JSON files
* [ARROW-1425](https://issues.apache.org/jira/browse/ARROW-1425) - [Python] Document semantic differences between Spark timestamps and Arrow timestamps
* [ARROW-1572](https://issues.apache.org/jira/browse/ARROW-1572) - [C++] Implement "value counts" kernels for tabulating value frequencies
* [ARROW-1639](https://issues.apache.org/jira/browse/ARROW-1639) - [Python] More efficient serialization for RangeIndex in serialize\_pandas
* [ARROW-1642](https://issues.apache.org/jira/browse/ARROW-1642) - [GLib] Build GLib using Meson in Appveyor
* [ARROW-1807](https://issues.apache.org/jira/browse/ARROW-1807) - [JAVA] Reduce Heap Usage (Phase 3): consolidate buffers
* [ARROW-1896](https://issues.apache.org/jira/browse/ARROW-1896) - [C++] Do not allocate memory for primitive outputs in CastKernel::Call implementation
* [ARROW-2015](https://issues.apache.org/jira/browse/ARROW-2015) - [Java] Use Java Time and Date APIs instead of JodaTime
* [ARROW-2022](https://issues.apache.org/jira/browse/ARROW-2022) - [Format] Add custom metadata field specific to a RecordBatch message
* [ARROW-2112](https://issues.apache.org/jira/browse/ARROW-2112) - [C++] Enable cpplint to be run on Windows
* [ARROW-2243](https://issues.apache.org/jira/browse/ARROW-2243) - [C++] Enable IPO/LTO
* [ARROW-2409](https://issues.apache.org/jira/browse/ARROW-2409) - [Rust] Test for build warnings, remove current warnings
* [ARROW-2460](https://issues.apache.org/jira/browse/ARROW-2460) - [Rust] Schema and DataType::Struct should use Vec<Rc<Field\>\>
* [ARROW-2487](https://issues.apache.org/jira/browse/ARROW-2487) - [C++] Provide a variant of AppendValues that takes bytemaps for the nullability
* [ARROW-2523](https://issues.apache.org/jira/browse/ARROW-2523) - [Rust] Implement CAST operations for arrays
* [ARROW-2620](https://issues.apache.org/jira/browse/ARROW-2620) - [Rust] Integrate memory pool abstraction with rest of codebase
* [ARROW-2627](https://issues.apache.org/jira/browse/ARROW-2627) - [Python] Add option (or some equivalent) to toggle memory mapping functionality when using parquet.ParquetFile or other read entry points
* [ARROW-2904](https://issues.apache.org/jira/browse/ARROW-2904) - [C++] Use FirstTimeBitmapWriter instead of SetBit functions in builder.h/cc
* [ARROW-3066](https://issues.apache.org/jira/browse/ARROW-3066) - [Wiki] Add "How to contribute" to developer wiki
* [ARROW-3084](https://issues.apache.org/jira/browse/ARROW-3084) - [Python] Do we need to build both unicode variants of pyarrow wheels?
* [ARROW-3107](https://issues.apache.org/jira/browse/ARROW-3107) - [C++] arrow::PrettyPrint for Column instances
* [ARROW-3121](https://issues.apache.org/jira/browse/ARROW-3121) - [C++]  Mean kernel aggregate
* [ARROW-3123](https://issues.apache.org/jira/browse/ARROW-3123) - [C++] Incremental Count, Count Not Null aggregator
* [ARROW-3135](https://issues.apache.org/jira/browse/ARROW-3135) - [C++] Add helper functions for validity bitmap propagation in kernel context
* [ARROW-3149](https://issues.apache.org/jira/browse/ARROW-3149) - [C++] Use gRPC (when it exists) from conda-forge for CI builds
* [ARROW-3162](https://issues.apache.org/jira/browse/ARROW-3162) - [Python] Enable Flight servers to be implemented in pure Python
* [ARROW-3162](https://issues.apache.org/jira/browse/ARROW-3162) - [Python] Enable Flight servers to be implemented in pure Python
* [ARROW-3239](https://issues.apache.org/jira/browse/ARROW-3239) - [C++] Improve random data generation functions
* [ARROW-3255](https://issues.apache.org/jira/browse/ARROW-3255) - [C++/Python] Migrate Travis CI jobs off Xcode 6.4
* [ARROW-3289](https://issues.apache.org/jira/browse/ARROW-3289) - [C++] Implement DoPut command for Flight on client and server side
* [ARROW-3292](https://issues.apache.org/jira/browse/ARROW-3292) - [C++] Test Flight RPC in Travis CI
* [ARROW-3295](https://issues.apache.org/jira/browse/ARROW-3295) - [Packaging] Package gRPC libraries in conda-forge for use in builds, packaging
* [ARROW-3297](https://issues.apache.org/jira/browse/ARROW-3297) - [Python] Python bindings for Flight C++ client
* [ARROW-3311](https://issues.apache.org/jira/browse/ARROW-3311) - [R] Functions for deserializing IPC components from arrow::Buffer or from IO interface
* [ARROW-3328](https://issues.apache.org/jira/browse/ARROW-3328) - [Flight] Allow for optional unique flight identifier to be sent with FlightGetInfo
* [ARROW-3361](https://issues.apache.org/jira/browse/ARROW-3361) - [R] Run cpp/build-support/cpplint.py on C++ source files
* [ARROW-3364](https://issues.apache.org/jira/browse/ARROW-3364) - [Doc] Document docker compose setup
* [ARROW-3367](https://issues.apache.org/jira/browse/ARROW-3367) - [INTEGRATION] Port Spark integration test to the docker-compose setup
* [ARROW-3422](https://issues.apache.org/jira/browse/ARROW-3422) - [C++] Add "toolchain" target to ensure that all required toolchain libraries are built
* [ARROW-3434](https://issues.apache.org/jira/browse/ARROW-3434) - [Packaging] Add Apache ORC C++ library to conda-forge
* [ARROW-3435](https://issues.apache.org/jira/browse/ARROW-3435) - [C++] Add option to use dynamic linking with re2
* [ARROW-3511](https://issues.apache.org/jira/browse/ARROW-3511) - [Gandiva] support input selection vectors for both projector and filter
* [ARROW-3532](https://issues.apache.org/jira/browse/ARROW-3532) - [Python] Schema, StructType, StructArray field retrieval by name should raise warning or exception for multiple matches
* [ARROW-3550](https://issues.apache.org/jira/browse/ARROW-3550) - [C++] Use kUnknownNullCount in NumericArray constructor
* [ARROW-3554](https://issues.apache.org/jira/browse/ARROW-3554) - [C++] Reverse traits for C++
* [ARROW-3594](https://issues.apache.org/jira/browse/ARROW-3594) - [Packaging] Build "cares" library in conda-forge
* [ARROW-3595](https://issues.apache.org/jira/browse/ARROW-3595) - [Packaging] Build boringssl in conda-forge
* [ARROW-3596](https://issues.apache.org/jira/browse/ARROW-3596) - [Packaging] Build gRPC in conda-forge
* [ARROW-3619](https://issues.apache.org/jira/browse/ARROW-3619) - [R] Expose global thread pool optins
* [ARROW-3631](https://issues.apache.org/jira/browse/ARROW-3631) - [C\#] Add Appveyor build for C\#
* [ARROW-3653](https://issues.apache.org/jira/browse/ARROW-3653) - [Python/C++] Support data copying between different GPU devices
* [ARROW-3735](https://issues.apache.org/jira/browse/ARROW-3735) - [Python] Proper error handling in \_ensure\_type
* [ARROW-3761](https://issues.apache.org/jira/browse/ARROW-3761) - [R] Bindings for CompressedInputStream, CompressedOutputStream
* [ARROW-3763](https://issues.apache.org/jira/browse/ARROW-3763) - [C++] Write Parquet ByteArray / FixedLenByteArray reader batches directly into arrow::BinaryBuilder
* [ARROW-3769](https://issues.apache.org/jira/browse/ARROW-3769) - [C++] Support reading non-dictionary encoded binary Parquet columns directly as DictionaryArray
* [ARROW-3770](https://issues.apache.org/jira/browse/ARROW-3770) - [C++] Validate or add option to validate arrow::Table schema in parquet::arrow::FileWriter::WriteTable
* [ARROW-3816](https://issues.apache.org/jira/browse/ARROW-3816) - [R] nrow.RecordBatch method
* [ARROW-3824](https://issues.apache.org/jira/browse/ARROW-3824) - [R] Document developer workflow for building project, running unit tests in r/README.md
* [ARROW-3838](https://issues.apache.org/jira/browse/ARROW-3838) - [Rust] Implement CSV Writer
* [ARROW-3846](https://issues.apache.org/jira/browse/ARROW-3846) - [Gandiva] Build on Windows
* [ARROW-3882](https://issues.apache.org/jira/browse/ARROW-3882) - [Rust] PrimitiveArray<T\> should support cast operations
* [ARROW-3903](https://issues.apache.org/jira/browse/ARROW-3903) - [Python] Random array generator for Arrow conversion and Parquet testing
* [ARROW-3926](https://issues.apache.org/jira/browse/ARROW-3926) - [Python] Add Gandiva bindings to Python wheels
* [ARROW-3951](https://issues.apache.org/jira/browse/ARROW-3951) - [Go] implement a CSV writer
* [ARROW-3954](https://issues.apache.org/jira/browse/ARROW-3954) - [Rust] Add Slice to Array and ArrayData
* [ARROW-3965](https://issues.apache.org/jira/browse/ARROW-3965) - [Java] JDBC-to-Arrow Conversion: Configuration Object
* [ARROW-3966](https://issues.apache.org/jira/browse/ARROW-3966) - [Java] JDBC-to-Arrow Conversion: JDBC Metadata in Schema Fields
* [ARROW-3972](https://issues.apache.org/jira/browse/ARROW-3972) - [C++] Update to LLVM and Clang bits to 7.0
* [ARROW-3981](https://issues.apache.org/jira/browse/ARROW-3981) - [C++] Rename json.h
* [ARROW-3985](https://issues.apache.org/jira/browse/ARROW-3985) - [C++] Pass -C option when compiling with ccache to avoid some warnings
* [ARROW-4012](https://issues.apache.org/jira/browse/ARROW-4012) - [Documentation][C++] Document how to install Apache Arrow on MSYS2
* [ARROW-4014](https://issues.apache.org/jira/browse/ARROW-4014) - [C++] Fix "LIBCMT" warnings on MSVC
* [ARROW-4023](https://issues.apache.org/jira/browse/ARROW-4023) - [Gandiva] Address long CI times in macOS builds
* [ARROW-4024](https://issues.apache.org/jira/browse/ARROW-4024) - [Python] Cython compilation error on cython==0.27.3
* [ARROW-4031](https://issues.apache.org/jira/browse/ARROW-4031) - [C++] Refactor ArrayBuilder bitmap logic into TypedBufferBuilder<bool\>
* [ARROW-4040](https://issues.apache.org/jira/browse/ARROW-4040) - [Rust] Add array\_ops method for filtering an array
* [ARROW-4056](https://issues.apache.org/jira/browse/ARROW-4056) - [C++] Upgrade to boost-cpp 1.69.0 again
* [ARROW-4061](https://issues.apache.org/jira/browse/ARROW-4061) - [Rust] [Parquet] Implement "spaced" version for non-dictionary encoding/decoding
* [ARROW-4068](https://issues.apache.org/jira/browse/ARROW-4068) - [Gandiva] Support building with Xcode 6.4
* [ARROW-4071](https://issues.apache.org/jira/browse/ARROW-4071) - [Rust] Add rustfmt as a pre-commit hook
* [ARROW-4072](https://issues.apache.org/jira/browse/ARROW-4072) - [Rust] Set default value for PARQUET\_TEST\_DATA
* [ARROW-4092](https://issues.apache.org/jira/browse/ARROW-4092) - [Rust] Implement common Reader / DataSource trait for CSV and Parquet
* [ARROW-4094](https://issues.apache.org/jira/browse/ARROW-4094) - [Python] Store RangeIndex in Parquet files as metadata rather than a physical data column
* [ARROW-4110](https://issues.apache.org/jira/browse/ARROW-4110) - [C++] Do not generate distinct cast kernels when input and output type are the same
* [ARROW-4123](https://issues.apache.org/jira/browse/ARROW-4123) - [C++] Improve linting workflow and documentation for Windows-based developers
* [ARROW-4124](https://issues.apache.org/jira/browse/ARROW-4124) - [C++] Abstract aggregation kernel API
* [ARROW-4142](https://issues.apache.org/jira/browse/ARROW-4142) - [Java] JDBC-to-Arrow: JDBC Arrays
* [ARROW-4165](https://issues.apache.org/jira/browse/ARROW-4165) - [C++] Port cpp/apidoc/Windows.md and other files to Sphinx / rst
* [ARROW-4180](https://issues.apache.org/jira/browse/ARROW-4180) - [Java] Reduce verbose logging of ArrowBuf creation events?
* [ARROW-4196](https://issues.apache.org/jira/browse/ARROW-4196) - [Rust] Add explicit SIMD vectorization for arithmetic ops in "array\_ops"
* [ARROW-4198](https://issues.apache.org/jira/browse/ARROW-4198) - [Gandiva] Add support to cast timestamp
* [ARROW-4204](https://issues.apache.org/jira/browse/ARROW-4204) - [Gandiva] implement decimal subtract
* [ARROW-4205](https://issues.apache.org/jira/browse/ARROW-4205) - [Gandiva] Implement decimal multiply
* [ARROW-4206](https://issues.apache.org/jira/browse/ARROW-4206) - [Gandiva] Implement decimal divide
* [ARROW-4212](https://issues.apache.org/jira/browse/ARROW-4212) - [Python] [CUDA] Creating a CUDA buffer from Numba device array should be easier
* [ARROW-4230](https://issues.apache.org/jira/browse/ARROW-4230) - [C++] Enable building flight against system gRPC
* [ARROW-4232](https://issues.apache.org/jira/browse/ARROW-4232) - [C++] Follow conda-forge compiler ABI migration
* [ARROW-4234](https://issues.apache.org/jira/browse/ARROW-4234) - [C++] Add memory bandwidth benchmarks to arrow/util/machine-benchmark.cc
* [ARROW-4235](https://issues.apache.org/jira/browse/ARROW-4235) - [GLib] Use "column\_builder" in GArrowRecordBatchBuilder
* [ARROW-4236](https://issues.apache.org/jira/browse/ARROW-4236) - [JAVA] Distinct plasma client create exceptions
* [ARROW-4245](https://issues.apache.org/jira/browse/ARROW-4245) - [Rust] Add Rustdoc header to each source file
* [ARROW-4247](https://issues.apache.org/jira/browse/ARROW-4247) - [Packaging] Update verify script for 0.12.0
* [ARROW-4251](https://issues.apache.org/jira/browse/ARROW-4251) - [C++] Add option to use vendored Boost in verify-release-candidate.sh
* [ARROW-4262](https://issues.apache.org/jira/browse/ARROW-4262) - [Website] Blog post to give preview into using R and Arrow with Apache Spark
* [ARROW-4263](https://issues.apache.org/jira/browse/ARROW-4263) - [Rust] Donate DataFusion
* [ARROW-4265](https://issues.apache.org/jira/browse/ARROW-4265) - [C++] Automatic conversion between Table and std::vector<std::tuple<..\>\>
* [ARROW-4268](https://issues.apache.org/jira/browse/ARROW-4268) - [C++] Add C primitive to Arrow:Type compile time in TypeTraits
* [ARROW-4271](https://issues.apache.org/jira/browse/ARROW-4271) - [Rust] Move Parquet specific info to Parquet Readme
* [ARROW-4273](https://issues.apache.org/jira/browse/ARROW-4273) - [Release] Fix verification script to use cf201901 conda-forge label
* [ARROW-4277](https://issues.apache.org/jira/browse/ARROW-4277) - [C++] Add gmock to toolchain
* [ARROW-4281](https://issues.apache.org/jira/browse/ARROW-4281) - [CI] Use Ubuntu Xenial (16.04) VMs on Travis-CI
* [ARROW-4285](https://issues.apache.org/jira/browse/ARROW-4285) - [Python] Use proper builder interface for serialization
* [ARROW-4287](https://issues.apache.org/jira/browse/ARROW-4287) - [C++] Ensure minimal bison version on OSX for Thrift
* [ARROW-4289](https://issues.apache.org/jira/browse/ARROW-4289) - [C++] Forward AR and RANLIB to thirdparty builds
* [ARROW-4290](https://issues.apache.org/jira/browse/ARROW-4290) - [C++/Gandiva] Support detecting correct LLVM version in Homebrew
* [ARROW-4291](https://issues.apache.org/jira/browse/ARROW-4291) - [Dev] Support selecting features in release scripts
* [ARROW-4294](https://issues.apache.org/jira/browse/ARROW-4294) - [Plasma] Add support for evicting objects to external store
* [ARROW-4297](https://issues.apache.org/jira/browse/ARROW-4297) - [C++] Fix build for 32-bit MSYS2
* [ARROW-4298](https://issues.apache.org/jira/browse/ARROW-4298) - [Java] Building Flight fails with OpenJDK 11
* [ARROW-4299](https://issues.apache.org/jira/browse/ARROW-4299) - [Ruby] Depend on the same version as Red Arrow
* [ARROW-4300](https://issues.apache.org/jira/browse/ARROW-4300) - [C++] Restore apache-arrow Homebrew recipe and define process for maintaining and updating for releases
* [ARROW-4303](https://issues.apache.org/jira/browse/ARROW-4303) - [Gandiva/Python] Build LLVM with RTTI in manylinux1 container
* [ARROW-4305](https://issues.apache.org/jira/browse/ARROW-4305) - [Rust] Fix parquet version number in README
* [ARROW-4307](https://issues.apache.org/jira/browse/ARROW-4307) - [C++] FIx doxygen warnings, include doxygen warning checks in CI linting
* [ARROW-4310](https://issues.apache.org/jira/browse/ARROW-4310) - [Website] Update install document for 0.12.0
* [ARROW-4313](https://issues.apache.org/jira/browse/ARROW-4313) - Define general benchmark database schema
* [ARROW-4315](https://issues.apache.org/jira/browse/ARROW-4315) - [Website] Home page of https://arrow.apache.org/ does not mention Go or Rust
* [ARROW-4318](https://issues.apache.org/jira/browse/ARROW-4318) - [C++] Add Tensor::CountNonZero
* [ARROW-4321](https://issues.apache.org/jira/browse/ARROW-4321) - [CI] Setup conda-forge channel globally in docker containers
* [ARROW-4330](https://issues.apache.org/jira/browse/ARROW-4330) - [C++] Use FindThreads.cmake to handle -pthread compiler/link options
* [ARROW-4331](https://issues.apache.org/jira/browse/ARROW-4331) - [C++] Extend Scalar Datum to support more types
* [ARROW-4332](https://issues.apache.org/jira/browse/ARROW-4332) - [Website] Instructions and scripts for publishing web site appear to be incorrect
* [ARROW-4334](https://issues.apache.org/jira/browse/ARROW-4334) - [CI] Setup conda-forge channel globally in travis builds
* [ARROW-4335](https://issues.apache.org/jira/browse/ARROW-4335) - [C++] Better document sparse tensor support
* [ARROW-4336](https://issues.apache.org/jira/browse/ARROW-4336) - [C++] Default BUILD\_WARNING\_LEVEL to CHECKIN
* [ARROW-4339](https://issues.apache.org/jira/browse/ARROW-4339) - [C++] rewrite cpp/README shorter, with a separate contribution guide
* [ARROW-4340](https://issues.apache.org/jira/browse/ARROW-4340) - [C++] Update IWYU version in the \`lint\` dockerfile
* [ARROW-4341](https://issues.apache.org/jira/browse/ARROW-4341) - [C++] Use TypedBufferBuilder<bool\> in BooleanBuilder
* [ARROW-4344](https://issues.apache.org/jira/browse/ARROW-4344) - [Java] Further cleanup maven output
* [ARROW-4345](https://issues.apache.org/jira/browse/ARROW-4345) - [C++] Add Apache 2.0 license file to the Parquet-testing repository
* [ARROW-4346](https://issues.apache.org/jira/browse/ARROW-4346) - [C++] Fix compiler warnings with gcc 8.2.0
* [ARROW-4352](https://issues.apache.org/jira/browse/ARROW-4352) - [C++] Add support for system Google Test
* [ARROW-4353](https://issues.apache.org/jira/browse/ARROW-4353) - [CI] Add jobs for 32-bit and 64-bit MinGW
* [ARROW-4358](https://issues.apache.org/jira/browse/ARROW-4358) - [Gandiva][Crossbow] Trusty build broken
* [ARROW-4361](https://issues.apache.org/jira/browse/ARROW-4361) - [Website] Update commiters list
* [ARROW-4362](https://issues.apache.org/jira/browse/ARROW-4362) - [Java] Test OpenJDK 11 in CI
* [ARROW-4363](https://issues.apache.org/jira/browse/ARROW-4363) - [C++] Add CMake format checks
* [ARROW-4372](https://issues.apache.org/jira/browse/ARROW-4372) - [C++] Embed precompiled bitcode in the gandiva library
* [ARROW-4373](https://issues.apache.org/jira/browse/ARROW-4373) - [Packaging] Travis fails to deploy conda packages on OSX
* [ARROW-4375](https://issues.apache.org/jira/browse/ARROW-4375) - [CI] Sphinx dependencies were removed from docs conda environment
* [ARROW-4376](https://issues.apache.org/jira/browse/ARROW-4376) - [Rust] Implement from\_buf\_reader for csv::Reader
* [ARROW-4377](https://issues.apache.org/jira/browse/ARROW-4377) - [Rust] Implement std::fmt::Debug for all PrimitiveArrays
* [ARROW-4379](https://issues.apache.org/jira/browse/ARROW-4379) - Register pyarrow serializers for collections.Counter and collections.deque.
* [ARROW-4383](https://issues.apache.org/jira/browse/ARROW-4383) - [C++] Use the CMake's standard find features
* [ARROW-4386](https://issues.apache.org/jira/browse/ARROW-4386) - [Rust] Implement Date and Time Arrays
* [ARROW-4388](https://issues.apache.org/jira/browse/ARROW-4388) - [Go] add DimNames() method to tensor Interface?
* [ARROW-4393](https://issues.apache.org/jira/browse/ARROW-4393) - [Rust] coding style: apply 90 characters per line limit
* [ARROW-4396](https://issues.apache.org/jira/browse/ARROW-4396) - Update Typedoc to support TypeScript 3.2
* [ARROW-4397](https://issues.apache.org/jira/browse/ARROW-4397) - [C++] dim\_names in Tensor and SparseTensor
* [ARROW-4399](https://issues.apache.org/jira/browse/ARROW-4399) - [C++] Remove usage of "extern template class" from NumericArray<T\>
* [ARROW-4401](https://issues.apache.org/jira/browse/ARROW-4401) - [Python] Alpine dockerfile fails to build because pandas requires numpy as build dependency
* [ARROW-4406](https://issues.apache.org/jira/browse/ARROW-4406) - Ignore "\*\_$folder$" files on S3
* [ARROW-4408](https://issues.apache.org/jira/browse/ARROW-4408) - [CPP/Doc] Remove outdated Parquet documentation
* [ARROW-4422](https://issues.apache.org/jira/browse/ARROW-4422) - [Plasma] Enforce memory limit in plasma, rather than relying on dlmalloc\_set\_footprint\_limit
* [ARROW-4423](https://issues.apache.org/jira/browse/ARROW-4423) - [C++] Update version of vendored gtest to 1.8.1
* [ARROW-4424](https://issues.apache.org/jira/browse/ARROW-4424) - [Python] Manylinux CI builds failing
* [ARROW-4425](https://issues.apache.org/jira/browse/ARROW-4425) - Add link to 'Contributing' page in the top-level Arrow README
* [ARROW-4430](https://issues.apache.org/jira/browse/ARROW-4430) - [C++] add unit test for currently unused append method
* [ARROW-4431](https://issues.apache.org/jira/browse/ARROW-4431) - [C++] Build gRPC as ExternalProject without allowing it to build its vendored dependencies
* [ARROW-4435](https://issues.apache.org/jira/browse/ARROW-4435) - [C\#] Add .sln file and minor .csproj fix ups
* [ARROW-4436](https://issues.apache.org/jira/browse/ARROW-4436) - [Documentation] Clarify instructions for building documentation
* [ARROW-4442](https://issues.apache.org/jira/browse/ARROW-4442) - [JS] Overly broad type annotation for Chunked typeId leading to type mismatches in generated typing
* [ARROW-4444](https://issues.apache.org/jira/browse/ARROW-4444) - [Testing] Add DataFusion test files to arrow-testing repo
* [ARROW-4445](https://issues.apache.org/jira/browse/ARROW-4445) - [C++][Gandiva] Run Gandiva-LLVM tests in Appveyor
* [ARROW-4446](https://issues.apache.org/jira/browse/ARROW-4446) - [Python] Run Gandiva tests on Windows and Appveyor
* [ARROW-4448](https://issues.apache.org/jira/browse/ARROW-4448) - [JAVA][Flight] Flaky Flight java test
* [ARROW-4449](https://issues.apache.org/jira/browse/ARROW-4449) - [Rust] Convert File to T: Read + Seek for schema inference
* [ARROW-4454](https://issues.apache.org/jira/browse/ARROW-4454) - [C++] fix unused parameter warnings
* [ARROW-4455](https://issues.apache.org/jira/browse/ARROW-4455) - [Plasma] g++ 8 reports class-memaccess warnings
* [ARROW-4459](https://issues.apache.org/jira/browse/ARROW-4459) - [Testing] Add git submodule for arrow-testing data files
* [ARROW-4460](https://issues.apache.org/jira/browse/ARROW-4460) - [Website] Write blog post to announce DataFusion donation
* [ARROW-4461](https://issues.apache.org/jira/browse/ARROW-4461) - [C++] Expose bit-util methods for binary boolean operations that don't allocate
* [ARROW-4462](https://issues.apache.org/jira/browse/ARROW-4462) - [C++] Upgrade LZ4 v1.7.5 to v1.8.3 to compile with VS2017
* [ARROW-4464](https://issues.apache.org/jira/browse/ARROW-4464) - [Rust] [DataFusion] Add support for LIMIT
* [ARROW-4466](https://issues.apache.org/jira/browse/ARROW-4466) - [Rust] [DataFusion] Add support for Parquet data sources
* [ARROW-4468](https://issues.apache.org/jira/browse/ARROW-4468) - [Rust] Implement BitAnd/BitOr for &Buffer (with SIMD)
* [ARROW-4472](https://issues.apache.org/jira/browse/ARROW-4472) - [Website][Python] Blog post about Python string memory use improvements in 0.12
* [ARROW-4475](https://issues.apache.org/jira/browse/ARROW-4475) - [Python] Serializing objects that contain themselves
* [ARROW-4476](https://issues.apache.org/jira/browse/ARROW-4476) - [Rust] [DataFusion] Post donation clean up tasks
* [ARROW-4481](https://issues.apache.org/jira/browse/ARROW-4481) - [Website] Instructions for publishing web site are missing a step
* [ARROW-4483](https://issues.apache.org/jira/browse/ARROW-4483) - [Website] Fix broken link (author) in DataFusion blog post
* [ARROW-4485](https://issues.apache.org/jira/browse/ARROW-4485) - [CI] Determine maintenance approach to pinned conda-forge binutils package
* [ARROW-4486](https://issues.apache.org/jira/browse/ARROW-4486) - [Python][CUDA] pyarrow.cuda.Context.foreign\_buffer should have a \`base=None\` argument
* [ARROW-4488](https://issues.apache.org/jira/browse/ARROW-4488) - [Rust] From AsRef<[u8]\> for Buffer does not ensure correct padding
* [ARROW-4489](https://issues.apache.org/jira/browse/ARROW-4489) - [Rust] PrimitiveArray.value\_slice performs bounds checking when it should not
* [ARROW-4490](https://issues.apache.org/jira/browse/ARROW-4490) - [Rust] Add explicit SIMD vectorization for boolean ops in "array\_ops"
* [ARROW-4491](https://issues.apache.org/jira/browse/ARROW-4491) - [Python] Remove usage of std::to\_string and std::stoi
* [ARROW-4499](https://issues.apache.org/jira/browse/ARROW-4499) - [Python][CI] Upgrade to latest flake8 3.7.5 in travis\_lint.sh
* [ARROW-4502](https://issues.apache.org/jira/browse/ARROW-4502) - [C\#] Add support for zero-copy reads
* [ARROW-4506](https://issues.apache.org/jira/browse/ARROW-4506) - [Ruby] Add Arrow::RecordBatch\#raw\_records
* [ARROW-4513](https://issues.apache.org/jira/browse/ARROW-4513) - [Rust] Implement BitAnd/BitOr for &Bitmap
* [ARROW-4517](https://issues.apache.org/jira/browse/ARROW-4517) - [JS] remove version number as it is not used
* [ARROW-4518](https://issues.apache.org/jira/browse/ARROW-4518) - [JS] add jsdelivr to package.json
* [ARROW-4528](https://issues.apache.org/jira/browse/ARROW-4528) - [C++] Update lint docker container to LLVM-7
* [ARROW-4529](https://issues.apache.org/jira/browse/ARROW-4529) - [C++] Add test coverage for BitUtils::RoundDown
* [ARROW-4531](https://issues.apache.org/jira/browse/ARROW-4531) - [C++] Handling of non-aligned slices in Sum kernel
* [ARROW-4537](https://issues.apache.org/jira/browse/ARROW-4537) - [CI] Suppress shell warning on travis-ci
* [ARROW-4539](https://issues.apache.org/jira/browse/ARROW-4539) - [Java]List vector child value count not set correctly
* [ARROW-4540](https://issues.apache.org/jira/browse/ARROW-4540) - [Rust] Add basic JSON reader
* [ARROW-4543](https://issues.apache.org/jira/browse/ARROW-4543) - [C\#] Update Flat Buffers code to latest version
* [ARROW-4546](https://issues.apache.org/jira/browse/ARROW-4546) - [C++] LICENSE.txt should be updated.
* [ARROW-4547](https://issues.apache.org/jira/browse/ARROW-4547) - [Python][Documentation] Update python/development.rst with instructions for CUDA-enabled builds
* [ARROW-4556](https://issues.apache.org/jira/browse/ARROW-4556) - [Rust] Preserve order of JSON inferred schema
* [ARROW-4558](https://issues.apache.org/jira/browse/ARROW-4558) - [C++][Flight] Avoid undefined behavior with gRPC memory optimizations
* [ARROW-4560](https://issues.apache.org/jira/browse/ARROW-4560) - [R] array() needs to take single input, not ...
* [ARROW-4562](https://issues.apache.org/jira/browse/ARROW-4562) - [C++][Flight] Create outgoing composite grpc::ByteBuffer instead of allocating contiguous slice and copying IpcPayload into it
* [ARROW-4564](https://issues.apache.org/jira/browse/ARROW-4564) - [C++] IWYU docker image silently fails
* [ARROW-4565](https://issues.apache.org/jira/browse/ARROW-4565) - [R] Reading records with all non-null decimals SEGFAULTs
* [ARROW-4568](https://issues.apache.org/jira/browse/ARROW-4568) - [C++] Add version macros to headers
* [ARROW-4572](https://issues.apache.org/jira/browse/ARROW-4572) - [C++] Remove memory zeroing from PrimitiveAllocatingUnaryKernel
* [ARROW-4583](https://issues.apache.org/jira/browse/ARROW-4583) - [Plasma] There are bugs reported by code scan tool
* [ARROW-4586](https://issues.apache.org/jira/browse/ARROW-4586) - [Rust] Remove arrow/mod.rs as it is not needed
* [ARROW-4589](https://issues.apache.org/jira/browse/ARROW-4589) - [Rust] [DataFusion] Implement projection push down query optimizer rule
* [ARROW-4590](https://issues.apache.org/jira/browse/ARROW-4590) - [Rust] Add explicit SIMD vectorization for comparison ops in "array\_ops"
* [ARROW-4592](https://issues.apache.org/jira/browse/ARROW-4592) - [GLib] Stop configure immediately when GLib isn't available
* [ARROW-4593](https://issues.apache.org/jira/browse/ARROW-4593) - [Ruby] Arrow::Array\#[out\_of\_range] returns nil
* [ARROW-4594](https://issues.apache.org/jira/browse/ARROW-4594) - [Ruby] Arrow::StructArray\#[] returns Arrow::Struct instead of Arrow::Array
* [ARROW-4595](https://issues.apache.org/jira/browse/ARROW-4595) - [Rust] [DataFusion] Implement DataFrame style API
* [ARROW-4598](https://issues.apache.org/jira/browse/ARROW-4598) - [CI] Remove needless LLVM\_DIR for macOS
* [ARROW-4599](https://issues.apache.org/jira/browse/ARROW-4599) - [C++] Add support for system GFlags
* [ARROW-4602](https://issues.apache.org/jira/browse/ARROW-4602) - [Rust][ [DataFusion] Integrate query optimizer with ExecutionContext
* [ARROW-4603](https://issues.apache.org/jira/browse/ARROW-4603) - [Rust] [DataFusion] Execution context should allow in-memory data sources to be registered
* [ARROW-4604](https://issues.apache.org/jira/browse/ARROW-4604) - [Rust] [DataFusion] Add benchmarks for SQL query execution
* [ARROW-4605](https://issues.apache.org/jira/browse/ARROW-4605) - [Rust] Move filter and limit code from DataFusion into compute module
* [ARROW-4609](https://issues.apache.org/jira/browse/ARROW-4609) - [C++] Use google benchmark from toolchain
* [ARROW-4610](https://issues.apache.org/jira/browse/ARROW-4610) - [Plasma] Avoid JNI from crashing
* [ARROW-4611](https://issues.apache.org/jira/browse/ARROW-4611) - [C++] Rework CMake third-party logic
* [ARROW-4612](https://issues.apache.org/jira/browse/ARROW-4612) - [Python] Use cython from PyPI for windows wheels build
* [ARROW-4613](https://issues.apache.org/jira/browse/ARROW-4613) - [C++] Alpine build failing as libgtestd.so is not found
* [ARROW-4614](https://issues.apache.org/jira/browse/ARROW-4614) - [C++/CI] Activate flight build in ci/docker\_build\_cpp.sh
* [ARROW-4615](https://issues.apache.org/jira/browse/ARROW-4615) - [C++] Add checked\_pointer\_cast
* [ARROW-4616](https://issues.apache.org/jira/browse/ARROW-4616) - [C++] Log message in BuildUtils as STATUS
* [ARROW-4618](https://issues.apache.org/jira/browse/ARROW-4618) - [Docker] Makefile to build dependent docker images
* [ARROW-4619](https://issues.apache.org/jira/browse/ARROW-4619) - [R]: Fix the autobrew script
* [ARROW-4620](https://issues.apache.org/jira/browse/ARROW-4620) - [C\#] Add unit tests for "Types" in arrow/csharp
* [ARROW-4623](https://issues.apache.org/jira/browse/ARROW-4623) - [R] update Rcpp dependency
* [ARROW-4628](https://issues.apache.org/jira/browse/ARROW-4628) - [Rust] [DataFusion] Implement type coercion query optimizer rule
* [ARROW-4632](https://issues.apache.org/jira/browse/ARROW-4632) - [Ruby] Add BigDecimal\#to\_arrow
* [ARROW-4634](https://issues.apache.org/jira/browse/ARROW-4634) - [Rust] [Parquet] Reorganize test\_common mod to allow more test util codes.
* [ARROW-4637](https://issues.apache.org/jira/browse/ARROW-4637) - [Python] Avoid importing Pandas unless necessary
* [ARROW-4638](https://issues.apache.org/jira/browse/ARROW-4638) - [R] install instructions using brew
* [ARROW-4640](https://issues.apache.org/jira/browse/ARROW-4640) - [Python] Add docker-compose configuration to build and test the project without pandas installed
* [ARROW-4643](https://issues.apache.org/jira/browse/ARROW-4643) - [C++] Add compiler diagnostic color when using Ninja
* [ARROW-4644](https://issues.apache.org/jira/browse/ARROW-4644) - [C++/Docker] Build Gandiva in the docker containers
* [ARROW-4645](https://issues.apache.org/jira/browse/ARROW-4645) - [C++/Packaging] Ship Gandiva with OSX and Windows wheels
* [ARROW-4646](https://issues.apache.org/jira/browse/ARROW-4646) - [C++/Packaging] Ship gandiva with the conda-forge packages
* [ARROW-4655](https://issues.apache.org/jira/browse/ARROW-4655) - [Packaging] Parallelize binary upload
* [ARROW-4662](https://issues.apache.org/jira/browse/ARROW-4662) - [Python] Add type\_codes property in UnionType
* [ARROW-4667](https://issues.apache.org/jira/browse/ARROW-4667) - [C++] Suppress unused function warnings with MinGW
* [ARROW-4670](https://issues.apache.org/jira/browse/ARROW-4670) - [Rust] compute::sum performance issue
* [ARROW-4671](https://issues.apache.org/jira/browse/ARROW-4671) - [C++] MakeBuilder doesn't support Type::DICTIONARY
* [ARROW-4673](https://issues.apache.org/jira/browse/ARROW-4673) - [C++] Implement AssertDatumEquals
* [ARROW-4676](https://issues.apache.org/jira/browse/ARROW-4676) - [C++] Add support for debug build with MinGW
* [ARROW-4678](https://issues.apache.org/jira/browse/ARROW-4678) - [Rust] Minimize unstable feature usage
* [ARROW-4679](https://issues.apache.org/jira/browse/ARROW-4679) - [Rust] [DataFusion] Implement in-memory DataSource
* [ARROW-4681](https://issues.apache.org/jira/browse/ARROW-4681) - [Rust] [DataFusion] Implement parallel query execution using threads
* [ARROW-4686](https://issues.apache.org/jira/browse/ARROW-4686) - Only accept 'y' or 'n' in merge\_arrow\_pr.py prompts
* [ARROW-4689](https://issues.apache.org/jira/browse/ARROW-4689) - [Go] add support for WASM
* [ARROW-4690](https://issues.apache.org/jira/browse/ARROW-4690) - [Python] Building TensorFlow compatible wheels for Arrow
* [ARROW-4692](https://issues.apache.org/jira/browse/ARROW-4692) - [Format][Documentation] Add more details about "sidecar" to flight proto
* [ARROW-4693](https://issues.apache.org/jira/browse/ARROW-4693) - [CI] Build boost library with multi precision
* [ARROW-4697](https://issues.apache.org/jira/browse/ARROW-4697) - [C++] Add URI parsing facility
* [ARROW-4703](https://issues.apache.org/jira/browse/ARROW-4703) - [C++] Upgrade dependency versions
* [ARROW-4705](https://issues.apache.org/jira/browse/ARROW-4705) - [Rust] CSV reader should show line number and error message when failing to parse a line
* [ARROW-4707](https://issues.apache.org/jira/browse/ARROW-4707) - [C++] move BitsetStack to bit-util.h
* [ARROW-4718](https://issues.apache.org/jira/browse/ARROW-4718) - Add ArrowStreamWriter/Reader ctors that leave open the underlying Stream
* [ARROW-4727](https://issues.apache.org/jira/browse/ARROW-4727) - [Rust] Implement ability to check if two schemas are the same
* [ARROW-4730](https://issues.apache.org/jira/browse/ARROW-4730) - [C++] Add docker-compose entry for testing Fedora build with system packages
* [ARROW-4731](https://issues.apache.org/jira/browse/ARROW-4731) - [C++] Add docker-compose entry for testing Ubuntu Xenial build with system packages
* [ARROW-4732](https://issues.apache.org/jira/browse/ARROW-4732) - [C++] Add docker-compose entry for testing Debian Testing build with system packages
* [ARROW-4733](https://issues.apache.org/jira/browse/ARROW-4733) - [C++] Add CI entry that builds without the conda-forge toolchain but with system packages
* [ARROW-4734](https://issues.apache.org/jira/browse/ARROW-4734) - [Go] Add option to write a header for CSV writer
* [ARROW-4735](https://issues.apache.org/jira/browse/ARROW-4735) - [Go] Benchmark strconv.Format vs. fmt.Sprintf for CSV writer
* [ARROW-4739](https://issues.apache.org/jira/browse/ARROW-4739) - [Rust] [DataFusion] It should be possible to share a logical plan between threads
* [ARROW-4740](https://issues.apache.org/jira/browse/ARROW-4740) - [Java] Upgrade to JUnit 5
* [ARROW-4743](https://issues.apache.org/jira/browse/ARROW-4743) - [Java] Fix documentation in arrow memory module
* [ARROW-4745](https://issues.apache.org/jira/browse/ARROW-4745) - [C++][Documentation] Document process for replicating static\_crt builds on windows
* [ARROW-4749](https://issues.apache.org/jira/browse/ARROW-4749) - [Rust] RecordBatch::new() should return result instead of panicking
* [ARROW-4751](https://issues.apache.org/jira/browse/ARROW-4751) - [C++] Add pkg-config to conda\_env\_cpp.yml
* [ARROW-4754](https://issues.apache.org/jira/browse/ARROW-4754) - [CI][Java] Flaky TestAuth Flight test
* [ARROW-4756](https://issues.apache.org/jira/browse/ARROW-4756) - [CI] document the procedure to update docker image for manylinux1 builds
* [ARROW-4758](https://issues.apache.org/jira/browse/ARROW-4758) - [Flight] Build fails on Mac due to missing Schema\_generated.h
* [ARROW-4769](https://issues.apache.org/jira/browse/ARROW-4769) - [Rust] Improve array limit function where max records \> len
* [ARROW-4772](https://issues.apache.org/jira/browse/ARROW-4772) - Provide new ORC adapter interface that allow user to specify row number
* [ARROW-4776](https://issues.apache.org/jira/browse/ARROW-4776) - [C++] DictionaryBuilder should support bootstrapping from an existing dict type
* [ARROW-4777](https://issues.apache.org/jira/browse/ARROW-4777) - [C++/Python] manylinux1: Update lz4 to 1.8.3
* [ARROW-4778](https://issues.apache.org/jira/browse/ARROW-4778) - [C++/Python] manylinux1: Update Thrift to 0.12.0
* [ARROW-4782](https://issues.apache.org/jira/browse/ARROW-4782) - [C++] Prototype scalar and array expression types for developing deferred operator algebra
* [ARROW-4786](https://issues.apache.org/jira/browse/ARROW-4786) - [C++/Python] Support better parallelisation in manylinux1 base build
* [ARROW-4789](https://issues.apache.org/jira/browse/ARROW-4789) - [C++] Deprecate and and later remove arrow::io::ReadableFileInterface
* [ARROW-4790](https://issues.apache.org/jira/browse/ARROW-4790) - [Python/Packaging] Update manylinux docker image in crossbow task
* [ARROW-4791](https://issues.apache.org/jira/browse/ARROW-4791) - Unused dependencies in arrow and datafusion
* [ARROW-4794](https://issues.apache.org/jira/browse/ARROW-4794) - [Python] Make pandas an optional test dependency
* [ARROW-4797](https://issues.apache.org/jira/browse/ARROW-4797) - [Plasma] Avoid store crash if not enough memory is available
* [ARROW-4801](https://issues.apache.org/jira/browse/ARROW-4801) - [GLib] Suppress pkgconfig.generate() warnings
* [ARROW-4808](https://issues.apache.org/jira/browse/ARROW-4808) - [Java][Vector] Convenience methods for setting decimal vector
* [ARROW-4812](https://issues.apache.org/jira/browse/ARROW-4812) - [Rust] [DataFusion] Table.scan() should return one iterator per partition
* [ARROW-4817](https://issues.apache.org/jira/browse/ARROW-4817) - [Rust] [DataFusion] Small re-org of modules
* [ARROW-4818](https://issues.apache.org/jira/browse/ARROW-4818) - [Rust] [DataFusion] Parquet data source does not support null values
* [ARROW-4826](https://issues.apache.org/jira/browse/ARROW-4826) - [Go] export Flush method for CSV writer
* [ARROW-4831](https://issues.apache.org/jira/browse/ARROW-4831) - [C++] CMAKE\_AR is not passed to ZSTD thirdparty dependency
* [ARROW-4833](https://issues.apache.org/jira/browse/ARROW-4833) - [Release] Document how to update the brew formula in the release management guide
* [ARROW-4834](https://issues.apache.org/jira/browse/ARROW-4834) - [R] Feature flag to disable parquet
* [ARROW-4835](https://issues.apache.org/jira/browse/ARROW-4835) - [GLib] Add boolean operations
* [ARROW-4837](https://issues.apache.org/jira/browse/ARROW-4837) - [C++] Support c++filt on a custom path in the run-test.sh script
* [ARROW-4839](https://issues.apache.org/jira/browse/ARROW-4839) - [C\#] Add NuGet support
* [ARROW-4843](https://issues.apache.org/jira/browse/ARROW-4843) - [Rust] [DataFusion] Parquet data source should support DATE
* [ARROW-4846](https://issues.apache.org/jira/browse/ARROW-4846) - [Java] Update Jackson to 2.9.8
* [ARROW-4849](https://issues.apache.org/jira/browse/ARROW-4849) - [C++] Add docker-compose entry for testing Ubuntu Bionic build with system packages
* [ARROW-4854](https://issues.apache.org/jira/browse/ARROW-4854) - [Rust] Use Array Slice for limit kernel
* [ARROW-4855](https://issues.apache.org/jira/browse/ARROW-4855) - [Packaging] Generate default package version based on cpp tags in crossbow.py
* [ARROW-4858](https://issues.apache.org/jira/browse/ARROW-4858) - [Flight][Python] Enable custom FlightDataStream in Python
* [ARROW-4859](https://issues.apache.org/jira/browse/ARROW-4859) - [GLib] Add garrow\_numeric\_array\_mean()
* [ARROW-4862](https://issues.apache.org/jira/browse/ARROW-4862) - [GLib] Add GArrowCastOptions::allow-invalid-utf8 property
* [ARROW-4862](https://issues.apache.org/jira/browse/ARROW-4862) - [GLib] Add GArrowCastOptions::allow-invalid-utf8 property
* [ARROW-4865](https://issues.apache.org/jira/browse/ARROW-4865) - [Rust] Support casting lists and primitives to lists
* [ARROW-4873](https://issues.apache.org/jira/browse/ARROW-4873) - [C++] Clarify documentation about how to use external ARROW\_PACKAGE\_PREFIX while also using CONDA dependency resolution
* [ARROW-4878](https://issues.apache.org/jira/browse/ARROW-4878) - [C++] ARROW\_DEPENDENCY\_SOURCE=CONDA does not work properly with MSVC
* [ARROW-4882](https://issues.apache.org/jira/browse/ARROW-4882) - [GLib] Add "Sum" functions
* [ARROW-4887](https://issues.apache.org/jira/browse/ARROW-4887) - [GLib] Add garrow\_array\_count()
* [ARROW-4889](https://issues.apache.org/jira/browse/ARROW-4889) - [C++] Add STATUS messages for Protobuf in CMake
* [ARROW-4891](https://issues.apache.org/jira/browse/ARROW-4891) - [C++] ZLIB include directories not added
* [ARROW-4892](https://issues.apache.org/jira/browse/ARROW-4892) - [Rust] [DataFusion] Move SQL parser and planner into sql package
* [ARROW-4893](https://issues.apache.org/jira/browse/ARROW-4893) - [C++] conda packages should use $PREFIX inside of conda-build
* [ARROW-4894](https://issues.apache.org/jira/browse/ARROW-4894) - [Rust] [DataFusion] Remove all uses of panic! from aggregate.rs
* [ARROW-4895](https://issues.apache.org/jira/browse/ARROW-4895) - [Rust] [DataFusion] Move error.rs to top level package
* [ARROW-4896](https://issues.apache.org/jira/browse/ARROW-4896) - [Rust] [DataFusion] Remove all uses of panic! from tests
* [ARROW-4897](https://issues.apache.org/jira/browse/ARROW-4897) - [Rust] [DataFusion] Improve Rustdoc
* [ARROW-4898](https://issues.apache.org/jira/browse/ARROW-4898) - [C++] Old versions of FindProtobuf.cmake use ALL-CAPS for variables
* [ARROW-4899](https://issues.apache.org/jira/browse/ARROW-4899) - [Rust] [DataFusion] Remove all uses of panic! from expression.rs
* [ARROW-4901](https://issues.apache.org/jira/browse/ARROW-4901) - [Go] Run tests in Appveyor
* [ARROW-4905](https://issues.apache.org/jira/browse/ARROW-4905) - [C++][Plasma] Remove dlmalloc from client library
* [ARROW-4907](https://issues.apache.org/jira/browse/ARROW-4907) - [CI] Add docker container to inspect docker context
* [ARROW-4908](https://issues.apache.org/jira/browse/ARROW-4908) - [Rust] [DataFusion] Add support for parquet date/time in int32/64 encoding
* [ARROW-4909](https://issues.apache.org/jira/browse/ARROW-4909) - [CI] Use hadolint to lint Dockerfiles
* [ARROW-4910](https://issues.apache.org/jira/browse/ARROW-4910) - [Rust] [DataFusion] Remove all uses of unimplemented!
* [ARROW-4915](https://issues.apache.org/jira/browse/ARROW-4915) - [GLib] Add support for arrow::NullBuilder
* [ARROW-4922](https://issues.apache.org/jira/browse/ARROW-4922) - [Packaging] Use system libraris for .deb and .rpm
* [ARROW-4924](https://issues.apache.org/jira/browse/ARROW-4924) - [Ruby] Add Decimal128\#to\_s(scale=nil)
* [ARROW-4925](https://issues.apache.org/jira/browse/ARROW-4925) - [Rust] [DataFusion] Remove duplicate implementations of collect\_expr
* [ARROW-4926](https://issues.apache.org/jira/browse/ARROW-4926) - [Rust] [DataFusion] Update README for 0.13.0 release
* [ARROW-4929](https://issues.apache.org/jira/browse/ARROW-4929) - [GLib] Add garrow\_array\_count\_values()
* [ARROW-4932](https://issues.apache.org/jira/browse/ARROW-4932) - [GLib] Use G\_DECLARE\_DERIVABLE\_TYPE macro
* [ARROW-4933](https://issues.apache.org/jira/browse/ARROW-4933) - [R] Autodetect Parquet support using pkg-config
* [ARROW-4937](https://issues.apache.org/jira/browse/ARROW-4937) - [R] Clean pkg-config related logic
* [ARROW-4939](https://issues.apache.org/jira/browse/ARROW-4939) - [Python] Add wrapper for "sum" kernel
* [ARROW-4940](https://issues.apache.org/jira/browse/ARROW-4940) - [Rust] Enhance documentation for datafusion
* [ARROW-4944](https://issues.apache.org/jira/browse/ARROW-4944) - [C++] Raise minimal required thrift-cpp to 0.11 in conda environment
* [ARROW-4946](https://issues.apache.org/jira/browse/ARROW-4946) - [C++] Support detection of flatbuffers without FlatbuffersConfig.cmake
* [ARROW-4947](https://issues.apache.org/jira/browse/ARROW-4947) - [Flight][C++/Python] Remove redundant schema parameter in DoGet
* [ARROW-4951](https://issues.apache.org/jira/browse/ARROW-4951) - [C++] Turn off cpp benchmarks in cpp docker images
* [ARROW-4955](https://issues.apache.org/jira/browse/ARROW-4955) - [GLib] Add garrow\_file\_is\_closed()
* [ARROW-4964](https://issues.apache.org/jira/browse/ARROW-4964) - [Ruby] Add closed check if available on auto close
* [ARROW-4969](https://issues.apache.org/jira/browse/ARROW-4969) - [C++] Set RPATH in correct order for test executables on OSX
* [ARROW-4977](https://issues.apache.org/jira/browse/ARROW-4977) - [Ruby] Add support for building on Windows
* [ARROW-4978](https://issues.apache.org/jira/browse/ARROW-4978) - [Ruby] Fix wrong internal variable name for table data
* [ARROW-4979](https://issues.apache.org/jira/browse/ARROW-4979) - [GLib] Add missing lock to garrow::GIOInputStream
* [ARROW-4980](https://issues.apache.org/jira/browse/ARROW-4980) - [GLib] Use GInputStream as the parent of GArrowInputStream
* [ARROW-4981](https://issues.apache.org/jira/browse/ARROW-4981) - [Ruby] Add support for CSV data encoding conversion
* [ARROW-4983](https://issues.apache.org/jira/browse/ARROW-4983) - [Plasma] Unmap memory when the client is destroyed
* [ARROW-4994](https://issues.apache.org/jira/browse/ARROW-4994) - [website] Update Details for ptgoetz
* [ARROW-4995](https://issues.apache.org/jira/browse/ARROW-4995) - [R] Make sure winbuilder tests pass for package
* [ARROW-4996](https://issues.apache.org/jira/browse/ARROW-4996) - [Plasma] There are many log files in /tmp
* [ARROW-5003](https://issues.apache.org/jira/browse/ARROW-5003) - [R] remove dependency on withr
* [ARROW-5006](https://issues.apache.org/jira/browse/ARROW-5006) - [R] parquet.cpp does not include enough Rcpp
* [ARROW-5011](https://issues.apache.org/jira/browse/ARROW-5011) - [Release] Add support in the source release script for custom hash
* [ARROW-5013](https://issues.apache.org/jira/browse/ARROW-5013) - [Rust] [DataFusion] Refactor runtime expression support
* [ARROW-5014](https://issues.apache.org/jira/browse/ARROW-5014) - [Java] Fix typos in Flight module
* [ARROW-5018](https://issues.apache.org/jira/browse/ARROW-5018) - [Release] Include JavaScript implementation
* [ARROW-5032](https://issues.apache.org/jira/browse/ARROW-5032) - [C++] Headers in vendored/datetime directory aren't installed
* [ARROW-5041](https://issues.apache.org/jira/browse/ARROW-5041) - [Release][C++] use bundled gtest and gmock in verify-release-candidate.bat
* [ARROW-5075](https://issues.apache.org/jira/browse/ARROW-5075) - [Release] Add 0.13.0 release note
* [ARROW-5084](https://issues.apache.org/jira/browse/ARROW-5084) - [Website] Blog post / release announcement for 0.13.0
* [PARQUET-1477](https://issues.apache.org/jira/browse/PARQUET-1477) - Thrift crypto updates
* [PARQUET-1508](https://issues.apache.org/jira/browse/PARQUET-1508) - [C++] Enable reading from ByteArray and FixedLenByteArray decoders directly into arrow::BinaryBuilder or arrow::BinaryDictionaryBuilder
* [PARQUET-1519](https://issues.apache.org/jira/browse/PARQUET-1519) - [C++] Remove use of "extern template class" from parquet/column\_reader.h
* [PARQUET-1521](https://issues.apache.org/jira/browse/PARQUET-1521) - [C++] Do not use "extern template class" with parquet::ColumnWriter
* [PARQUET-1525](https://issues.apache.org/jira/browse/PARQUET-1525) - [C++] remove dependency on getopt in parquet tools



# Apache Arrow 0.12.1 (2019-02-25)

## Bug Fixes

* [ARROW-3564](https://issues.apache.org/jira/browse/ARROW-3564) - [Python] writing version 2.0 parquet format with dictionary encoding enabled
* [ARROW-4255](https://issues.apache.org/jira/browse/ARROW-4255) - [C++] Schema::GetFieldIndex is not thread-safe
* [ARROW-4267](https://issues.apache.org/jira/browse/ARROW-4267) - [Python/C++][Parquet] Segfault when reading rowgroups with duplicated columns
* [ARROW-4323](https://issues.apache.org/jira/browse/ARROW-4323) - [Packaging] Fix failing OSX clang conda forge builds
* [ARROW-4367](https://issues.apache.org/jira/browse/ARROW-4367) - [C++] StringDictionaryBuilder segfaults on Finish with only null entries
* [ARROW-4374](https://issues.apache.org/jira/browse/ARROW-4374) - [C++] DictionaryBuilder does not correctly report length and null\_count
* [ARROW-4492](https://issues.apache.org/jira/browse/ARROW-4492) - [Python] Failure reading Parquet column as pandas Categorical in 0.12
* [ARROW-4501](https://issues.apache.org/jira/browse/ARROW-4501) - [C++] Unique returns non-unique strings
* [ARROW-4582](https://issues.apache.org/jira/browse/ARROW-4582) - [C++/Python] Memory corruption on Pandas-\>Arrow conversion
* [ARROW-4629](https://issues.apache.org/jira/browse/ARROW-4629) - [Python] Pandas to arrow conversion slowed down by local imports
* [ARROW-4636](https://issues.apache.org/jira/browse/ARROW-4636) - [Python/Packaging] Crossbow builds for conda-osx fail on upload with Ruby linkage errors
* [ARROW-4647](https://issues.apache.org/jira/browse/ARROW-4647) - [Packaging] dev/release/00-prepare.sh fails for minor version changes


## New Features and Improvements

* [ARROW-4291](https://issues.apache.org/jira/browse/ARROW-4291) - [Dev] Support selecting features in release scripts
* [ARROW-4298](https://issues.apache.org/jira/browse/ARROW-4298) - [Java] Building Flight fails with OpenJDK 11
* [ARROW-4373](https://issues.apache.org/jira/browse/ARROW-4373) - [Packaging] Travis fails to deploy conda packages on OSX



# Apache Arrow 0.12.0 (2019-01-20)

## New Features and Improvements

* [ARROW-45](https://issues.apache.org/jira/browse/ARROW-45) - [Python] Add unnest/flatten function for List types
* [ARROW-536](https://issues.apache.org/jira/browse/ARROW-536) - [C++] Provide non-SSE4 versions of functions that use CPU intrinsics for older processors
* [ARROW-554](https://issues.apache.org/jira/browse/ARROW-554) - [C++] Implement functions to conform unequal dictionaries amongst multiple Arrow arrays
* [ARROW-766](https://issues.apache.org/jira/browse/ARROW-766) - [C++] Introduce zero-copy "StringPiece" type
* [ARROW-854](https://issues.apache.org/jira/browse/ARROW-854) - [Format] Support sparse tensor
* [ARROW-912](https://issues.apache.org/jira/browse/ARROW-912) - [Python] Account for multiarch systems in development.rst
* [ARROW-1019](https://issues.apache.org/jira/browse/ARROW-1019) - [C++] Implement input stream and output stream with Gzip codec
* [ARROW-1055](https://issues.apache.org/jira/browse/ARROW-1055) - [C++] GPU support library development
* [ARROW-1262](https://issues.apache.org/jira/browse/ARROW-1262) - [Packaging] Packaging automation in arrow-dist
* [ARROW-1423](https://issues.apache.org/jira/browse/ARROW-1423) - [C++] Create non-owned CudaContext from context handle provided by thirdparty user
* [ARROW-1492](https://issues.apache.org/jira/browse/ARROW-1492) - [C++] Type casting function kernel suite
* [ARROW-1688](https://issues.apache.org/jira/browse/ARROW-1688) - [Java] Fail build on checkstyle warnings
* [ARROW-1696](https://issues.apache.org/jira/browse/ARROW-1696) - [C++] Add codec benchmarks
* [ARROW-1822](https://issues.apache.org/jira/browse/ARROW-1822) - [C++] Add SSE4.2-accelerated hash kernels and use if host CPU supports
* [ARROW-1993](https://issues.apache.org/jira/browse/ARROW-1993) - [Python] Add function for determining implied Arrow schema from pandas.DataFrame
* [ARROW-1994](https://issues.apache.org/jira/browse/ARROW-1994) - [Python] Test against Pandas master
* [ARROW-2183](https://issues.apache.org/jira/browse/ARROW-2183) - [C++] Add helper CMake function for globbing the right header files
* [ARROW-2211](https://issues.apache.org/jira/browse/ARROW-2211) - [C++] Use simpler hash functions for integers
* [ARROW-2216](https://issues.apache.org/jira/browse/ARROW-2216) - [CI] CI descriptions and envars are misleading
* [ARROW-2337](https://issues.apache.org/jira/browse/ARROW-2337) - [Scripts] Windows release verification script should use boost DSOs instead of static linkage
* [ARROW-2374](https://issues.apache.org/jira/browse/ARROW-2374) - [Rust] Add support for array of List<T\>
* [ARROW-2475](https://issues.apache.org/jira/browse/ARROW-2475) - [Format] Confusing array length description
* [ARROW-2476](https://issues.apache.org/jira/browse/ARROW-2476) - [Python/Question] Maximum length of an Array created from ndarray
* [ARROW-2483](https://issues.apache.org/jira/browse/ARROW-2483) - [Rust] use bit-packing for boolean vectors
* [ARROW-2504](https://issues.apache.org/jira/browse/ARROW-2504) - [Website] Add ApacheCon NA link
* [ARROW-2535](https://issues.apache.org/jira/browse/ARROW-2535) - [Python] Provide pre-commit hooks that check flake8
* [ARROW-2560](https://issues.apache.org/jira/browse/ARROW-2560) - [Rust] The Rust README should include Rust-specific information on contributing
* [ARROW-2624](https://issues.apache.org/jira/browse/ARROW-2624) - [Python] Random schema and data generator for Arrow conversion and Parquet testing
* [ARROW-2637](https://issues.apache.org/jira/browse/ARROW-2637) - [C++/Python] Build support and instructions for development on Alpine Linux
* [ARROW-2648](https://issues.apache.org/jira/browse/ARROW-2648) - [Packaging] Follow up packaging tasks
* [ARROW-2653](https://issues.apache.org/jira/browse/ARROW-2653) - [C++] Refactor hash table support
* [ARROW-2670](https://issues.apache.org/jira/browse/ARROW-2670) - [C++/Python] Add Ubuntu 18.04 / gcc7 as a nightly build
* [ARROW-2673](https://issues.apache.org/jira/browse/ARROW-2673) - [Python] Add documentation + docstring for ARROW-2661
* [ARROW-2684](https://issues.apache.org/jira/browse/ARROW-2684) - [Python] Various documentation improvements
* [ARROW-2712](https://issues.apache.org/jira/browse/ARROW-2712) - [C\#] Initial C\# .NET library
* [ARROW-2720](https://issues.apache.org/jira/browse/ARROW-2720) - [C++] Clean up cmake CXX\_STANDARD and PIC flag setting
* [ARROW-2759](https://issues.apache.org/jira/browse/ARROW-2759) - Export notification socket of Plasma
* [ARROW-2803](https://issues.apache.org/jira/browse/ARROW-2803) - [C++] Put hashing function into src/arrow/util
* [ARROW-2807](https://issues.apache.org/jira/browse/ARROW-2807) - [Python] Enable memory-mapping to be toggled in get\_reader when reading Parquet files
* [ARROW-2808](https://issues.apache.org/jira/browse/ARROW-2808) - [Python] Add unit tests for ProxyMemoryPool, enable new default MemoryPool to be constructed
* [ARROW-2919](https://issues.apache.org/jira/browse/ARROW-2919) - [C++] Improve error message when listing empty HDFS file
* [ARROW-2968](https://issues.apache.org/jira/browse/ARROW-2968) - [R] Multi-threaded conversion from Arrow table to R data.frame
* [ARROW-2995](https://issues.apache.org/jira/browse/ARROW-2995) - [CI] Build Python libraries in same run when running C++ unit tests so project does not need to be rebuilt again right away
* [ARROW-3020](https://issues.apache.org/jira/browse/ARROW-3020) - [Python] Addition of option to allow empty Parquet row groups
* [ARROW-3038](https://issues.apache.org/jira/browse/ARROW-3038) - [Go] add support for StringArray
* [ARROW-3063](https://issues.apache.org/jira/browse/ARROW-3063) - [Go] move list of supported/TODO features to confluence
* [ARROW-3070](https://issues.apache.org/jira/browse/ARROW-3070) - [Release] Host binary artifacts for RCs and releases on ASF Bintray account instead of dist/mirror system
* [ARROW-3108](https://issues.apache.org/jira/browse/ARROW-3108) - [C++] arrow::PrettyPrint for Table instances
* [ARROW-3126](https://issues.apache.org/jira/browse/ARROW-3126) - [Python] Make Buffered\* IO classes available to Python, incorporate into input\_stream, output\_stream factory functions
* [ARROW-3131](https://issues.apache.org/jira/browse/ARROW-3131) - [Go] add test for Go-1.11
* [ARROW-3161](https://issues.apache.org/jira/browse/ARROW-3161) - [Packaging] Ensure to run pyarrow unit tests in conda and wheel builds
* [ARROW-3169](https://issues.apache.org/jira/browse/ARROW-3169) - [C++] Break array-test.cc and array.cc into multiple compilation units
* [ARROW-3184](https://issues.apache.org/jira/browse/ARROW-3184) - [C++] Add modular build targets, "all" target, and require explicit target when invoking make or ninja
* [ARROW-3194](https://issues.apache.org/jira/browse/ARROW-3194) - [Java] Fix setValueCount in spitAndTransfer for variable width vectors
* [ARROW-3199](https://issues.apache.org/jira/browse/ARROW-3199) - [Plasma] Check for EAGAIN in recvmsg and sendmsg
* [ARROW-3209](https://issues.apache.org/jira/browse/ARROW-3209) - [C++] Rename libarrow\_gpu to libarrow\_cuda
* [ARROW-3230](https://issues.apache.org/jira/browse/ARROW-3230) - [Python] Missing comparisons on ChunkedArray, Table
* [ARROW-3233](https://issues.apache.org/jira/browse/ARROW-3233) - [Python] Sphinx documentation for pyarrow.cuda GPU support
* [ARROW-3248](https://issues.apache.org/jira/browse/ARROW-3248) - [C++] Arrow tests should have label "arrow"
* [ARROW-3254](https://issues.apache.org/jira/browse/ARROW-3254) - [C++] Add option to ADD\_ARROW\_TEST to compose a test executable from multiple .cc files containing unit tests
* [ARROW-3260](https://issues.apache.org/jira/browse/ARROW-3260) - [CI] Make linting a separate job
* [ARROW-3272](https://issues.apache.org/jira/browse/ARROW-3272) - [Java] Document checkstyle deviations from Google style guide
* [ARROW-3273](https://issues.apache.org/jira/browse/ARROW-3273) - [Java] checkstyle - fix javadoc style
* [ARROW-3278](https://issues.apache.org/jira/browse/ARROW-3278) - [Python] Retrieve StructType's and StructArray's field by name
* [ARROW-3291](https://issues.apache.org/jira/browse/ARROW-3291) - [C++] Convenience API for constructing arrow::io::BufferReader from std::string
* [ARROW-3293](https://issues.apache.org/jira/browse/ARROW-3293) - [C++] Test Flight RPC in Travis CI
* [ARROW-3296](https://issues.apache.org/jira/browse/ARROW-3296) - [Python] Add Flight support to manylinux1 wheels
* [ARROW-3303](https://issues.apache.org/jira/browse/ARROW-3303) - [C++] Enable example arrays to be written with a simplified JSON representation
* [ARROW-3306](https://issues.apache.org/jira/browse/ARROW-3306) - [R] Objects and support functions different kinds of arrow::Buffer
* [ARROW-3307](https://issues.apache.org/jira/browse/ARROW-3307) - [R] Convert chunked arrow::Column to R vector
* [ARROW-3310](https://issues.apache.org/jira/browse/ARROW-3310) - [R] Create wrapper classes for various Arrow IO interfaces
* [ARROW-3312](https://issues.apache.org/jira/browse/ARROW-3312) - [R] Use same .clang-format file for both R binding C++ code and main C++ codebase
* [ARROW-3315](https://issues.apache.org/jira/browse/ARROW-3315) - [R] Support for multi-threaded conversions from RecordBatch, Table to R data.frame
* [ARROW-3318](https://issues.apache.org/jira/browse/ARROW-3318) - [C++] Convenience method for reading all batches from an IPC stream or file as arrow::Table
* [ARROW-3323](https://issues.apache.org/jira/browse/ARROW-3323) - [Java] checkstyle - fix naming
* [ARROW-3331](https://issues.apache.org/jira/browse/ARROW-3331) - [C++] Add re2 to ThirdpartyToolchain
* [ARROW-3340](https://issues.apache.org/jira/browse/ARROW-3340) - [R] support for dates and time classes
* [ARROW-3347](https://issues.apache.org/jira/browse/ARROW-3347) - [Rust] Implement PrimitiveArrayBuilder
* [ARROW-3353](https://issues.apache.org/jira/browse/ARROW-3353) - [Packaging] Build python 3.7 wheels
* [ARROW-3355](https://issues.apache.org/jira/browse/ARROW-3355) - [R] Support for factors
* [ARROW-3358](https://issues.apache.org/jira/browse/ARROW-3358) - [Gandiva][C++] Replace usages of gandiva/status.h with arrow/status.h
* [ARROW-3362](https://issues.apache.org/jira/browse/ARROW-3362) - [R] Guard against null buffers
* [ARROW-3366](https://issues.apache.org/jira/browse/ARROW-3366) - [R] Dockerfile for docker-compose setup
* [ARROW-3368](https://issues.apache.org/jira/browse/ARROW-3368) - [Integration/CI/Python] Add dask integration test to docker-compose setup
* [ARROW-3380](https://issues.apache.org/jira/browse/ARROW-3380) - [Python] Support reading CSV files and more from a gzipped file
* [ARROW-3381](https://issues.apache.org/jira/browse/ARROW-3381) - [C++] Implement InputStream for bz2 files
* [ARROW-3383](https://issues.apache.org/jira/browse/ARROW-3383) - [Java] Run Gandiva tests in Travis CI
* [ARROW-3384](https://issues.apache.org/jira/browse/ARROW-3384) - [Gandiva] Sync remaining commits from gandiva repo
* [ARROW-3385](https://issues.apache.org/jira/browse/ARROW-3385) - [Java] [Gandiva] Deploy gandiva snapshot jars automatically
* [ARROW-3387](https://issues.apache.org/jira/browse/ARROW-3387) - [C++] Function to cast binary to string/utf8 with UTF8 validation
* [ARROW-3398](https://issues.apache.org/jira/browse/ARROW-3398) - [Rust] Update existing Builder to use MutableBuffer internally
* [ARROW-3402](https://issues.apache.org/jira/browse/ARROW-3402) - [Gandiva][C++] Utilize common bitmap operation implementations in precompiled IR routines
* [ARROW-3407](https://issues.apache.org/jira/browse/ARROW-3407) - [C++] Add UTF8 conversion modes in CSV reader conversion options
* [ARROW-3409](https://issues.apache.org/jira/browse/ARROW-3409) - [C++] Add streaming compression interfaces
* [ARROW-3421](https://issues.apache.org/jira/browse/ARROW-3421) - [C++] Add include-what-you-use setup to primary docker-compose.yml
* [ARROW-3427](https://issues.apache.org/jira/browse/ARROW-3427) - [C++] Add Windows support, Unix static libs for double-conversion package in conda-forge
* [ARROW-3429](https://issues.apache.org/jira/browse/ARROW-3429) - [Packaging] Add a script to release binaries that use source archive at dist.apache.orgtable bit
* [ARROW-3430](https://issues.apache.org/jira/browse/ARROW-3430) - [Packaging] Add workaround to verify 0.11.0
* [ARROW-3431](https://issues.apache.org/jira/browse/ARROW-3431) - [GLib] Include Gemfile to archive
* [ARROW-3432](https://issues.apache.org/jira/browse/ARROW-3432) - [Packaging] Variables aren't expanded Subversion commit message
* [ARROW-3433](https://issues.apache.org/jira/browse/ARROW-3433) - [C++] Validate re2 with Windows toolchain, EP
* [ARROW-3439](https://issues.apache.org/jira/browse/ARROW-3439) - [R] R language bindings for Feather format
* [ARROW-3440](https://issues.apache.org/jira/browse/ARROW-3440) - [Gandiva][C++] Remove outdated cpp/src/gandiva/README.md, add build documentation to cpp/README.md
* [ARROW-3441](https://issues.apache.org/jira/browse/ARROW-3441) - [Gandiva][C++] Produce fewer test executables
* [ARROW-3442](https://issues.apache.org/jira/browse/ARROW-3442) - [C++] Use dynamic linking for unit tests, ensure coverage working properly with clang
* [ARROW-3450](https://issues.apache.org/jira/browse/ARROW-3450) - [R] Wrap MemoryMappedFile class
* [ARROW-3451](https://issues.apache.org/jira/browse/ARROW-3451) - [Python] Allocate CUDA memory from a CUcontext created by numba.cuda
* [ARROW-3455](https://issues.apache.org/jira/browse/ARROW-3455) - [Gandiva][C++] Support pkg-config for Gandiva
* [ARROW-3456](https://issues.apache.org/jira/browse/ARROW-3456) - [CI] Reuse docker images and optimize docker-compose containers
* [ARROW-3460](https://issues.apache.org/jira/browse/ARROW-3460) - [Packaging] Add a script to rebase master on local release branch
* [ARROW-3461](https://issues.apache.org/jira/browse/ARROW-3461) - [Packaging] Add a script to upload RC artifacts as the official release
* [ARROW-3462](https://issues.apache.org/jira/browse/ARROW-3462) - [Packaging] Update CHANGELOG for 0.11.0
* [ARROW-3463](https://issues.apache.org/jira/browse/ARROW-3463) - [Website] Update for 0.11.0
* [ARROW-3464](https://issues.apache.org/jira/browse/ARROW-3464) - [Packaging] Build shared libraries for gandiva fat JAR via crossbow
* [ARROW-3465](https://issues.apache.org/jira/browse/ARROW-3465) - [Documentation] Fix gen\_apidocs' docker image
* [ARROW-3469](https://issues.apache.org/jira/browse/ARROW-3469) - [Gandiva] add travis entry for gandiva on OSX
* [ARROW-3472](https://issues.apache.org/jira/browse/ARROW-3472) - [Gandiva] remove gandiva helpers library
* [ARROW-3473](https://issues.apache.org/jira/browse/ARROW-3473) - [Format] Update Layout.md document to clarify use of 64-bit array lengths
* [ARROW-3474](https://issues.apache.org/jira/browse/ARROW-3474) - [GLib] Extend gparquet API with get\_schema and read\_column
* [ARROW-3479](https://issues.apache.org/jira/browse/ARROW-3479) - [R] Support to write record\_batch as stream
* [ARROW-3482](https://issues.apache.org/jira/browse/ARROW-3482) - [C++] Build with JEMALLOC by default
* [ARROW-3487](https://issues.apache.org/jira/browse/ARROW-3487) - [Gandiva] simplify NULL\_IF\_NULL functions that can return errors
* [ARROW-3488](https://issues.apache.org/jira/browse/ARROW-3488) - [Packaging] Separate crossbow task definition files for packaging and tests
* [ARROW-3489](https://issues.apache.org/jira/browse/ARROW-3489) - [Gandiva] Support for in expressions
* [ARROW-3490](https://issues.apache.org/jira/browse/ARROW-3490) - [R] streaming arrow objects to output streams
* [ARROW-3492](https://issues.apache.org/jira/browse/ARROW-3492) - [C++] Build jemalloc in parallel
* [ARROW-3493](https://issues.apache.org/jira/browse/ARROW-3493) - [Java] Document BOUNDS\_CHECKING\_ENABLED
* [ARROW-3499](https://issues.apache.org/jira/browse/ARROW-3499) - [R] Expose arrow::ipc::Message type
* [ARROW-3501](https://issues.apache.org/jira/browse/ARROW-3501) - [Gandiva] Enable building with gcc 4.8.x on Ubuntu Trusty, similar distros
* [ARROW-3504](https://issues.apache.org/jira/browse/ARROW-3504) - [Plasma] Add support for Plasma Client to put/get raw bytes without pyarrow serialization.
* [ARROW-3505](https://issues.apache.org/jira/browse/ARROW-3505) - [R] Read record batch and table
* [ARROW-3506](https://issues.apache.org/jira/browse/ARROW-3506) - [Packaging] Nightly tests for docker-compose images
* [ARROW-3508](https://issues.apache.org/jira/browse/ARROW-3508) - [C++] Build against double-conversion from conda-forge
* [ARROW-3515](https://issues.apache.org/jira/browse/ARROW-3515) - Introduce NumericTensor class
* [ARROW-3518](https://issues.apache.org/jira/browse/ARROW-3518) - [C++] Detect HOMEBREW\_PREFIX automatically
* [ARROW-3519](https://issues.apache.org/jira/browse/ARROW-3519) - [Gandiva] Add support for functions that can return variable len output
* [ARROW-3521](https://issues.apache.org/jira/browse/ARROW-3521) - [GLib] Run Python using find\_program in meson.build
* [ARROW-3529](https://issues.apache.org/jira/browse/ARROW-3529) - [Ruby] Import Red Parquet
* [ARROW-3530](https://issues.apache.org/jira/browse/ARROW-3530) - [Java/Python] Add conversion for pyarrow.Schema from org.apache…pojo.Schema
* [ARROW-3533](https://issues.apache.org/jira/browse/ARROW-3533) - [Python/Documentation] Use sphinx\_rtd\_theme instead of Bootstrap
* [ARROW-3536](https://issues.apache.org/jira/browse/ARROW-3536) - [C++] Fast UTF8 validation functions
* [ARROW-3537](https://issues.apache.org/jira/browse/ARROW-3537) - [Rust] Implement Tensor Type
* [ARROW-3539](https://issues.apache.org/jira/browse/ARROW-3539) - [CI/Packaging] Update scripts to build against vendored jemalloc
* [ARROW-3540](https://issues.apache.org/jira/browse/ARROW-3540) - [Rust] Incorporate BooleanArray into PrimitiveArray
* [ARROW-3542](https://issues.apache.org/jira/browse/ARROW-3542) - [C++] Use unsafe appends when building array from CSV
* [ARROW-3545](https://issues.apache.org/jira/browse/ARROW-3545) - [C++/Python] Normalize child/field terminology with StructType
* [ARROW-3547](https://issues.apache.org/jira/browse/ARROW-3547) - [R] Protect against Null crash when reading from RecordBatch
* [ARROW-3548](https://issues.apache.org/jira/browse/ARROW-3548) - Speed up storing small objects in the object store.
* [ARROW-3551](https://issues.apache.org/jira/browse/ARROW-3551) - Change MapD to OmniSci on Powered By page
* [ARROW-3553](https://issues.apache.org/jira/browse/ARROW-3553) - [R] Error when losing data on int64, uint64 conversions to double
* [ARROW-3555](https://issues.apache.org/jira/browse/ARROW-3555) - [Plasma] Unify plasma client get function using metadata.
* [ARROW-3556](https://issues.apache.org/jira/browse/ARROW-3556) - [CI] Disable optimizations on Windows
* [ARROW-3557](https://issues.apache.org/jira/browse/ARROW-3557) - [Python] Set language\_level in Cython sources
* [ARROW-3558](https://issues.apache.org/jira/browse/ARROW-3558) - [Plasma] Remove fatal error when plasma client calls get on an unsealed object that it created.
* [ARROW-3559](https://issues.apache.org/jira/browse/ARROW-3559) - Statically link libraries for plasma\_store\_server executable.
* [ARROW-3562](https://issues.apache.org/jira/browse/ARROW-3562) - [R] Disallow creation of objects with null shared\_ptr<T\>
* [ARROW-3563](https://issues.apache.org/jira/browse/ARROW-3563) - [C++] Declare public link dependencies so arrow\_static, plasma\_static automatically pull in transitive dependencies
* [ARROW-3566](https://issues.apache.org/jira/browse/ARROW-3566) - Clarify that the type of dictionary encoded field should be the encoded(index) type
* [ARROW-3567](https://issues.apache.org/jira/browse/ARROW-3567) - [Gandiva] [GLib] Add GLib bindings of Gandiva
* [ARROW-3568](https://issues.apache.org/jira/browse/ARROW-3568) - [Packaging] Run pyarrow unittests for windows wheels
* [ARROW-3569](https://issues.apache.org/jira/browse/ARROW-3569) - [Packaging] Run pyarrow unittests when building conda package
* [ARROW-3574](https://issues.apache.org/jira/browse/ARROW-3574) - Fix remaining bug with plasma static versus shared libraries.
* [ARROW-3575](https://issues.apache.org/jira/browse/ARROW-3575) - [Python] New documentation page for CSV reader
* [ARROW-3576](https://issues.apache.org/jira/browse/ARROW-3576) - [Python] Expose compressed file readers as NativeFile
* [ARROW-3577](https://issues.apache.org/jira/browse/ARROW-3577) - [Go] add support for ChunkedArray
* [ARROW-3581](https://issues.apache.org/jira/browse/ARROW-3581) - [Gandiva][C++] ARROW\_PROTOBUF\_USE\_SHARED isn't used
* [ARROW-3582](https://issues.apache.org/jira/browse/ARROW-3582) - [CI] Gandiva C++ build is always triggered
* [ARROW-3583](https://issues.apache.org/jira/browse/ARROW-3583) - [Python/Java] Create RecordBatch from VectorSchemaRoot
* [ARROW-3584](https://issues.apache.org/jira/browse/ARROW-3584) - [Go] add support for Table
* [ARROW-3587](https://issues.apache.org/jira/browse/ARROW-3587) - [Python] Efficient serialization for Arrow Objects (array, table, tensor, etc)
* [ARROW-3588](https://issues.apache.org/jira/browse/ARROW-3588) - [Java] checkstyle - fix license
* [ARROW-3589](https://issues.apache.org/jira/browse/ARROW-3589) - [Gandiva] Make it possible to compile gandiva without JNI
* [ARROW-3591](https://issues.apache.org/jira/browse/ARROW-3591) - [R] Support to collect decimal type
* [ARROW-3592](https://issues.apache.org/jira/browse/ARROW-3592) - [Python] Get BinaryArray value as zero copy memory view
* [ARROW-3597](https://issues.apache.org/jira/browse/ARROW-3597) - [Gandiva] gandiva should integrate with ADD\_ARROW\_TEST for tests
* [ARROW-3600](https://issues.apache.org/jira/browse/ARROW-3600) - [Packaging] Support Ubuntu 18.10
* [ARROW-3601](https://issues.apache.org/jira/browse/ARROW-3601) - [Rust] Release 0.11.0
* [ARROW-3602](https://issues.apache.org/jira/browse/ARROW-3602) - [Gandiva] [Python] Add preliminary Cython bindings for Gandiva
* [ARROW-3603](https://issues.apache.org/jira/browse/ARROW-3603) - [Gandiva][C++] Can't build with vendored Boost
* [ARROW-3605](https://issues.apache.org/jira/browse/ARROW-3605) - Remove AE library from plasma header files.
* [ARROW-3607](https://issues.apache.org/jira/browse/ARROW-3607) - [Java] delete() method via JNI for plasma
* [ARROW-3608](https://issues.apache.org/jira/browse/ARROW-3608) - [R] Support for time32 and time64 array types
* [ARROW-3609](https://issues.apache.org/jira/browse/ARROW-3609) - [Gandiva] Move benchmark tests out of unit test
* [ARROW-3610](https://issues.apache.org/jira/browse/ARROW-3610) - [C++] Add interface to turn stl\_allocator into arrow::MemoryPool
* [ARROW-3611](https://issues.apache.org/jira/browse/ARROW-3611) - Give error more quickly when pyarrow serialization context is used incorrectly.
* [ARROW-3612](https://issues.apache.org/jira/browse/ARROW-3612) - [Go] implement RecordBatch and RecordBatchReader
* [ARROW-3615](https://issues.apache.org/jira/browse/ARROW-3615) - [R] Support for NaN
* [ARROW-3616](https://issues.apache.org/jira/browse/ARROW-3616) - [Java] checkstyle - fix remaining coding checks
* [ARROW-3618](https://issues.apache.org/jira/browse/ARROW-3618) - [Packaging/Documentation] Add \`-c conda-forge\` option to avoid PackagesNotFoundError
* [ARROW-3620](https://issues.apache.org/jira/browse/ARROW-3620) - [Python] Document multithreading options in Sphinx and add to api.rst
* [ARROW-3621](https://issues.apache.org/jira/browse/ARROW-3621) - [Go] implement TableBatchReader
* [ARROW-3622](https://issues.apache.org/jira/browse/ARROW-3622) - [Go] implement Schema.Equal
* [ARROW-3623](https://issues.apache.org/jira/browse/ARROW-3623) - [Go] implement Field.Equal
* [ARROW-3624](https://issues.apache.org/jira/browse/ARROW-3624) - [Python/C++] Support for zero-sized device buffers
* [ARROW-3625](https://issues.apache.org/jira/browse/ARROW-3625) - [Go] add examples for Table, Record and {Table,Record}Reader
* [ARROW-3626](https://issues.apache.org/jira/browse/ARROW-3626) - [Go] add a CSV TableReader
* [ARROW-3627](https://issues.apache.org/jira/browse/ARROW-3627) - [Go] add RecordBatchBuilder
* [ARROW-3629](https://issues.apache.org/jira/browse/ARROW-3629) - [Python] Add write\_to\_dataset to Python Sphinx API listing
* [ARROW-3630](https://issues.apache.org/jira/browse/ARROW-3630) - [Plasma] [GLib] Add GLib bindings of Plasma
* [ARROW-3632](https://issues.apache.org/jira/browse/ARROW-3632) - [Packaging] Update deb names in dev/tasks/tasks.yml in dev/release/00-prepare.sh
* [ARROW-3633](https://issues.apache.org/jira/browse/ARROW-3633) - [Packaging] Update deb names in dev/tasks/tasks.yml for 0.12.0
* [ARROW-3636](https://issues.apache.org/jira/browse/ARROW-3636) - [C++/Python] Update arrow/python/pyarrow\_api.h
* [ARROW-3638](https://issues.apache.org/jira/browse/ARROW-3638) - [C++][Python] Move reading from Feather as Table feature to C++ from Python
* [ARROW-3639](https://issues.apache.org/jira/browse/ARROW-3639) - [Packaging] Run gandiva nightly packaging tasks
* [ARROW-3640](https://issues.apache.org/jira/browse/ARROW-3640) - [Go] add support for Tensors
* [ARROW-3641](https://issues.apache.org/jira/browse/ARROW-3641) - [C++/Python] remove public keyword from Cython api functions
* [ARROW-3642](https://issues.apache.org/jira/browse/ARROW-3642) - [C++] Add arrowConfig.cmake generation
* [ARROW-3644](https://issues.apache.org/jira/browse/ARROW-3644) - [Rust] Implement ListArrayBuilder
* [ARROW-3645](https://issues.apache.org/jira/browse/ARROW-3645) - [Python] Document compression support in Sphinx
* [ARROW-3646](https://issues.apache.org/jira/browse/ARROW-3646) - [Python] Add convenience factories to create IO streams
* [ARROW-3647](https://issues.apache.org/jira/browse/ARROW-3647) - [R] Crash after unloading bit64 package
* [ARROW-3648](https://issues.apache.org/jira/browse/ARROW-3648) - [Plasma] Add API to get metadata and data at the same time
* [ARROW-3649](https://issues.apache.org/jira/browse/ARROW-3649) - [Rust] Refactor MutableBuffer's resize
* [ARROW-3656](https://issues.apache.org/jira/browse/ARROW-3656) - [C++] Allow whitespace in numeric CSV fields
* [ARROW-3657](https://issues.apache.org/jira/browse/ARROW-3657) - [R] Require bit64 package
* [ARROW-3659](https://issues.apache.org/jira/browse/ARROW-3659) - [C++] Clang Travis build (matrix entry 2) might not actually be using clang
* [ARROW-3660](https://issues.apache.org/jira/browse/ARROW-3660) - [C++] Don't unnecessarily lock MemoryMappedFile for resizing in readonly files
* [ARROW-3661](https://issues.apache.org/jira/browse/ARROW-3661) - [Gandiva][GLib] Improve constant name
* [ARROW-3662](https://issues.apache.org/jira/browse/ARROW-3662) - [C++] Add a const overload to MemoryMappedFile::GetSize
* [ARROW-3664](https://issues.apache.org/jira/browse/ARROW-3664) - [Rust] Add benchmark for PrimitiveArrayBuilder
* [ARROW-3665](https://issues.apache.org/jira/browse/ARROW-3665) - [Rust] Implement StructArrayBuilder
* [ARROW-3666](https://issues.apache.org/jira/browse/ARROW-3666) - [C++] Improve CSV parser performance
* [ARROW-3672](https://issues.apache.org/jira/browse/ARROW-3672) - [Go] implement Time32 array
* [ARROW-3673](https://issues.apache.org/jira/browse/ARROW-3673) - [Go] implement Time64 array
* [ARROW-3674](https://issues.apache.org/jira/browse/ARROW-3674) - [Go] implement Date32 array
* [ARROW-3675](https://issues.apache.org/jira/browse/ARROW-3675) - [Go] implement Date64 array
* [ARROW-3677](https://issues.apache.org/jira/browse/ARROW-3677) - [Go] implement FixedSizedBinary array
* [ARROW-3681](https://issues.apache.org/jira/browse/ARROW-3681) - [Go] add benchmarks for CSV reader
* [ARROW-3682](https://issues.apache.org/jira/browse/ARROW-3682) - [Go] unexport encoding/csv.Reader from CSV reader
* [ARROW-3683](https://issues.apache.org/jira/browse/ARROW-3683) - [Go] add functional-option style to CSV reader
* [ARROW-3684](https://issues.apache.org/jira/browse/ARROW-3684) - [Go] add chunk size option to CSV reader
* [ARROW-3692](https://issues.apache.org/jira/browse/ARROW-3692) - [Gandiva] [Ruby] Add Ruby bindings of Gandiva
* [ARROW-3693](https://issues.apache.org/jira/browse/ARROW-3693) - [R] Invalid buffer for empty characters with null data
* [ARROW-3694](https://issues.apache.org/jira/browse/ARROW-3694) - [Java] Avoid superfluous string creation when logging level is disabled
* [ARROW-3695](https://issues.apache.org/jira/browse/ARROW-3695) - [Gandiva] Use add\_arrow\_lib()
* [ARROW-3696](https://issues.apache.org/jira/browse/ARROW-3696) - [C++] Add feather::TableWriter::Write(table)
* [ARROW-3697](https://issues.apache.org/jira/browse/ARROW-3697) - [Ruby] Add schema\#[]
* [ARROW-3701](https://issues.apache.org/jira/browse/ARROW-3701) - [Gandiva] Add support for decimal operations
* [ARROW-3708](https://issues.apache.org/jira/browse/ARROW-3708) - [Packaging] Nightly CentOS builds are failing
* [ARROW-3713](https://issues.apache.org/jira/browse/ARROW-3713) - [Rust] Implement BinaryArrayBuilder
* [ARROW-3718](https://issues.apache.org/jira/browse/ARROW-3718) - [Gandiva] Remove spurious gtest include
* [ARROW-3719](https://issues.apache.org/jira/browse/ARROW-3719) - [GLib] Support read/write table to/from Feather
* [ARROW-3720](https://issues.apache.org/jira/browse/ARROW-3720) - [GLib] Use "indices" instead of "indexes"
* [ARROW-3721](https://issues.apache.org/jira/browse/ARROW-3721) - [Gandiva] [Python] Support all Gandiva literals
* [ARROW-3722](https://issues.apache.org/jira/browse/ARROW-3722) - [C++] Allow specifying column types to CSV reader
* [ARROW-3723](https://issues.apache.org/jira/browse/ARROW-3723) - [Plasma] [Ruby] Add Ruby bindings of Plasma
* [ARROW-3724](https://issues.apache.org/jira/browse/ARROW-3724) - [GLib] Update gitignore
* [ARROW-3725](https://issues.apache.org/jira/browse/ARROW-3725) - [GLib] Add field readers to GArrowStructDataType
* [ARROW-3726](https://issues.apache.org/jira/browse/ARROW-3726) - [Rust] CSV Reader & Writer
* [ARROW-3727](https://issues.apache.org/jira/browse/ARROW-3727) - [Python] Document use of pyarrow.foreign\_buffer, cuda.foreign\_buffer in Sphinx
* [ARROW-3731](https://issues.apache.org/jira/browse/ARROW-3731) - [R] R API for reading and writing Parquet files
* [ARROW-3733](https://issues.apache.org/jira/browse/ARROW-3733) - [GLib] Add to\_string() to GArrowTable and GArrowColumn
* [ARROW-3736](https://issues.apache.org/jira/browse/ARROW-3736) - [CI/Docker] Ninja test in docker-compose run cpp hangs
* [ARROW-3738](https://issues.apache.org/jira/browse/ARROW-3738) - [C++] Add CSV conversion option to parse ISO8601-like timestamp strings
* [ARROW-3741](https://issues.apache.org/jira/browse/ARROW-3741) - [R] Add support for arrow::compute::Cast to convert Arrow arrays from one type to another
* [ARROW-3743](https://issues.apache.org/jira/browse/ARROW-3743) - [Ruby] Add support for saving/loading Feather
* [ARROW-3744](https://issues.apache.org/jira/browse/ARROW-3744) - [Ruby] Use garrow\_table\_to\_string() in Arrow::Table\#to\_s
* [ARROW-3746](https://issues.apache.org/jira/browse/ARROW-3746) - [Gandiva] [Python] Make it possible to list all functions registered with Gandiva
* [ARROW-3747](https://issues.apache.org/jira/browse/ARROW-3747) - [C++] Flip order of data members in arrow::Decimal128
* [ARROW-3748](https://issues.apache.org/jira/browse/ARROW-3748) - [GLib] Add GArrowCSVReader
* [ARROW-3749](https://issues.apache.org/jira/browse/ARROW-3749) - [GLib] Typos in documentation and test case name
* [ARROW-3751](https://issues.apache.org/jira/browse/ARROW-3751) - [Python] Add more cython bindings for gandiva
* [ARROW-3752](https://issues.apache.org/jira/browse/ARROW-3752) - [C++] Remove unused status::ArrowError
* [ARROW-3753](https://issues.apache.org/jira/browse/ARROW-3753) - [Gandiva] Remove debug print
* [ARROW-3755](https://issues.apache.org/jira/browse/ARROW-3755) - [GLib] Support for CompressedInputStream, CompressedOutputStream
* [ARROW-3760](https://issues.apache.org/jira/browse/ARROW-3760) - [R] Support Arrow CSV reader
* [ARROW-3773](https://issues.apache.org/jira/browse/ARROW-3773) - [C++] Remove duplicated AssertArraysEqual code in parquet/arrow/arrow-reader-writer-test.cc
* [ARROW-3778](https://issues.apache.org/jira/browse/ARROW-3778) - [C++] Don't put implementations in test-util.h
* [ARROW-3781](https://issues.apache.org/jira/browse/ARROW-3781) - [C++] Configure buffer size in arrow::io::BufferedOutputStream
* [ARROW-3782](https://issues.apache.org/jira/browse/ARROW-3782) - [C++] Implement BufferedReader for C++
* [ARROW-3784](https://issues.apache.org/jira/browse/ARROW-3784) - [R] Array with type fails with x is not a vector
* [ARROW-3785](https://issues.apache.org/jira/browse/ARROW-3785) - [C++] Use double-conversion conda package in CI toolchain
* [ARROW-3787](https://issues.apache.org/jira/browse/ARROW-3787) - Implement From<ListArray\> for BinaryArray
* [ARROW-3788](https://issues.apache.org/jira/browse/ARROW-3788) - [Ruby] Add support for CSV parser writtin in C++
* [ARROW-3795](https://issues.apache.org/jira/browse/ARROW-3795) - [R] Support for retrieving NAs from INT64 arrays
* [ARROW-3796](https://issues.apache.org/jira/browse/ARROW-3796) - [Rust] Add Example for PrimitiveArrayBuilder
* [ARROW-3798](https://issues.apache.org/jira/browse/ARROW-3798) - [GLib] Add support for column type CSV read options
* [ARROW-3800](https://issues.apache.org/jira/browse/ARROW-3800) - [C++] Vendor a string\_view backport
* [ARROW-3803](https://issues.apache.org/jira/browse/ARROW-3803) - [C++/Python] Split C++ and Python unit test Travis CI jobs, run all C++ tests (including Gandiva) together
* [ARROW-3807](https://issues.apache.org/jira/browse/ARROW-3807) - [R] Missing Field API
* [ARROW-3819](https://issues.apache.org/jira/browse/ARROW-3819) - [Packaging] Update conda variant files to conform with feedstock after compiler migration
* [ARROW-3821](https://issues.apache.org/jira/browse/ARROW-3821) - [Format/Documentation]: Fix typos and grammar issues in Flight.proto comments
* [ARROW-3823](https://issues.apache.org/jira/browse/ARROW-3823) - [R] + buffer.complex
* [ARROW-3825](https://issues.apache.org/jira/browse/ARROW-3825) - [Python] The Python README.md does not show how to run the unit test suite
* [ARROW-3826](https://issues.apache.org/jira/browse/ARROW-3826) - [C++] Determine if using ccache caching in Travis CI actually improves build times
* [ARROW-3830](https://issues.apache.org/jira/browse/ARROW-3830) - [GLib] Add GArrowCodec
* [ARROW-3834](https://issues.apache.org/jira/browse/ARROW-3834) - [Doc] Merge Python & C++ and move to top-level
* [ARROW-3836](https://issues.apache.org/jira/browse/ARROW-3836) - [C++] Add PREFIX option to ADD\_ARROW\_BENCHMARK
* [ARROW-3839](https://issues.apache.org/jira/browse/ARROW-3839) - [Rust] Add ability to infer schema in CSV reader
* [ARROW-3841](https://issues.apache.org/jira/browse/ARROW-3841) - [C++] warning: catching polymorphic type by value
* [ARROW-3842](https://issues.apache.org/jira/browse/ARROW-3842) - [R] RecordBatchStreamWriter api
* [ARROW-3844](https://issues.apache.org/jira/browse/ARROW-3844) - [C++] Remove ARROW\_USE\_SSE and ARROW\_SSE3
* [ARROW-3845](https://issues.apache.org/jira/browse/ARROW-3845) - [Gandiva] [GLib] Add GGandivaNode
* [ARROW-3847](https://issues.apache.org/jira/browse/ARROW-3847) - [GLib] Remove unnecessary “\”.
* [ARROW-3849](https://issues.apache.org/jira/browse/ARROW-3849) - Leverage Armv8 crc32 extension instructions to accelerate the hash computation for Arm64.
* [ARROW-3851](https://issues.apache.org/jira/browse/ARROW-3851) - [C++] "make check-format" is slow
* [ARROW-3852](https://issues.apache.org/jira/browse/ARROW-3852) - [C++] used uninitialized warning
* [ARROW-3853](https://issues.apache.org/jira/browse/ARROW-3853) - [C++] Implement string to timestamp cast
* [ARROW-3854](https://issues.apache.org/jira/browse/ARROW-3854) - [GLib] Deprecate garrow\_gio\_{input,output}\_stream\_get\_raw()
* [ARROW-3855](https://issues.apache.org/jira/browse/ARROW-3855) - [Rust] Schema/Field/Datatype should implement serde traits
* [ARROW-3856](https://issues.apache.org/jira/browse/ARROW-3856) - [Ruby] Support compressed CSV save/load
* [ARROW-3858](https://issues.apache.org/jira/browse/ARROW-3858) - [GLib] Use {class\_name}\_get\_instance\_private
* [ARROW-3859](https://issues.apache.org/jira/browse/ARROW-3859) - [Java] Fix ComplexWriter backward incompatible change
* [ARROW-3860](https://issues.apache.org/jira/browse/ARROW-3860) - [Gandiva] [C++] Add option to use -static-libstdc++ when building libgandiva\_jni.so
* [ARROW-3862](https://issues.apache.org/jira/browse/ARROW-3862) - [C++] Improve dependencies download script
* [ARROW-3863](https://issues.apache.org/jira/browse/ARROW-3863) - [GLib] Use travis\_retry with brew bundle command
* [ARROW-3864](https://issues.apache.org/jira/browse/ARROW-3864) - [GLib] Add support for allow-float-truncate cast option
* [ARROW-3865](https://issues.apache.org/jira/browse/ARROW-3865) - [Packaging] Add double-conversion dependency to conda forge recipes and the windows wheel build
* [ARROW-3867](https://issues.apache.org/jira/browse/ARROW-3867) - [Documentation] Uploading binary realase artifacts to Bintray
* [ARROW-3868](https://issues.apache.org/jira/browse/ARROW-3868) - [Rust] Build against nightly Rust in CI
* [ARROW-3870](https://issues.apache.org/jira/browse/ARROW-3870) - [C++] Add Peek to InputStream API
* [ARROW-3871](https://issues.apache.org/jira/browse/ARROW-3871) - [R] Replace usages of C++ GetValuesSafely with new methods on ArrayData
* [ARROW-3878](https://issues.apache.org/jira/browse/ARROW-3878) - [Rust] Improve primitive types
* [ARROW-3880](https://issues.apache.org/jira/browse/ARROW-3880) - [Rust] PrimitiveArray<T\> should support simple math operations
* [ARROW-3881](https://issues.apache.org/jira/browse/ARROW-3881) - [Rust] PrimitiveArray<T\> should support comparison operators
* [ARROW-3883](https://issues.apache.org/jira/browse/ARROW-3883) - [Rust] Update Rust README to reflect new functionality
* [ARROW-3884](https://issues.apache.org/jira/browse/ARROW-3884) - [Python] Add LLVM6 to manylinux1 base image
* [ARROW-3885](https://issues.apache.org/jira/browse/ARROW-3885) - [Rust] Update version to 0.12.0 and update release instructions on wiki
* [ARROW-3886](https://issues.apache.org/jira/browse/ARROW-3886) - [C++] Additional test cases for ARROW-3831
* [ARROW-3891](https://issues.apache.org/jira/browse/ARROW-3891) - [Java] Remove Long.bitCount with simple bitmap operations
* [ARROW-3893](https://issues.apache.org/jira/browse/ARROW-3893) - [C++] Improve adaptive int builder performance
* [ARROW-3895](https://issues.apache.org/jira/browse/ARROW-3895) - [Rust] CSV reader should return Result<Option<\>\> not Option<Result<\>\>
* [ARROW-3899](https://issues.apache.org/jira/browse/ARROW-3899) - [Python] Table.to\_pandas converts Arrow date32[day] to pandas datetime64[ns]
* [ARROW-3900](https://issues.apache.org/jira/browse/ARROW-3900) - [GLib] Add garrow\_mutable\_buffer\_set\_data()
* [ARROW-3905](https://issues.apache.org/jira/browse/ARROW-3905) - [Ruby] Add StructDataType\#[]
* [ARROW-3906](https://issues.apache.org/jira/browse/ARROW-3906) - [C++] Break builder.cc into multiple compilation units
* [ARROW-3908](https://issues.apache.org/jira/browse/ARROW-3908) - [Rust] Update rust dockerfile to use nightly toolchain
* [ARROW-3910](https://issues.apache.org/jira/browse/ARROW-3910) - [Python] Set date\_as\_object to True in \*.to\_pandas as default after deduplicating logic implemented
* [ARROW-3911](https://issues.apache.org/jira/browse/ARROW-3911) - [Python] Deduplicate datetime.date objects in Table.to\_pandas internals
* [ARROW-3912](https://issues.apache.org/jira/browse/ARROW-3912) - [Plasma][GLib] Add support for creating and referring objects
* [ARROW-3913](https://issues.apache.org/jira/browse/ARROW-3913) - [Gandiva] [GLib] Add GGandivaLiteralNode
* [ARROW-3914](https://issues.apache.org/jira/browse/ARROW-3914) - [C++/Python/Packaging] Docker-compose setup for Alpine linux
* [ARROW-3916](https://issues.apache.org/jira/browse/ARROW-3916) - [Python] Support caller-provided filesystem in \`ParquetWriter\` constructor
* [ARROW-3921](https://issues.apache.org/jira/browse/ARROW-3921) - [CI][GLib] Log Homebrew output
* [ARROW-3922](https://issues.apache.org/jira/browse/ARROW-3922) - [C++] improve the performance of bitmap operations
* [ARROW-3924](https://issues.apache.org/jira/browse/ARROW-3924) - [Packaging][Plasma] Add support for Plasma deb/rpm packages
* [ARROW-3925](https://issues.apache.org/jira/browse/ARROW-3925) - [Python] Include autoconf in Linux/macOS dependencies in conda environment
* [ARROW-3928](https://issues.apache.org/jira/browse/ARROW-3928) - [Python] Add option to deduplicate PyBytes / PyString / PyUnicode objects in Table.to\_pandas conversion path
* [ARROW-3929](https://issues.apache.org/jira/browse/ARROW-3929) - [Go] improve memory usage of CSV reader to improve runtime performances
* [ARROW-3930](https://issues.apache.org/jira/browse/ARROW-3930) - [C++] Random test data generation is slow
* [ARROW-3932](https://issues.apache.org/jira/browse/ARROW-3932) - [Python/Documentation] Include Benchmarks.md in Sphinx docs
* [ARROW-3934](https://issues.apache.org/jira/browse/ARROW-3934) - [Gandiva] Don't compile precompiled tests if ARROW\_GANDIVA\_BUILD\_TESTS=off
* [ARROW-3938](https://issues.apache.org/jira/browse/ARROW-3938) - [Packaging] Stop to refer java/pom.xml to get version information
* [ARROW-3939](https://issues.apache.org/jira/browse/ARROW-3939) - [Rust] Remove macro definition for ListArrayBuilder
* [ARROW-3945](https://issues.apache.org/jira/browse/ARROW-3945) - [Website] Blog post about Gandiva code donation
* [ARROW-3946](https://issues.apache.org/jira/browse/ARROW-3946) - [GLib] Add support for union
* [ARROW-3948](https://issues.apache.org/jira/browse/ARROW-3948) - [CI][GLib] Set timeout to Homebrew
* [ARROW-3950](https://issues.apache.org/jira/browse/ARROW-3950) - [Plasma] Don't force loading the TensorFlow op on import
* [ARROW-3952](https://issues.apache.org/jira/browse/ARROW-3952) - [Rust] Specify edition="2018" in Cargo.toml
* [ARROW-3958](https://issues.apache.org/jira/browse/ARROW-3958) - [Plasma] Reduce number of IPCs
* [ARROW-3959](https://issues.apache.org/jira/browse/ARROW-3959) - [Rust] Time and Timestamp Support
* [ARROW-3960](https://issues.apache.org/jira/browse/ARROW-3960) - [Rust] remove extern crate for Rust 2018
* [ARROW-3963](https://issues.apache.org/jira/browse/ARROW-3963) - [Packaging/Docker] Nightly test for building sphinx documentations
* [ARROW-3964](https://issues.apache.org/jira/browse/ARROW-3964) - [Go] More readable example for csv.Reader
* [ARROW-3967](https://issues.apache.org/jira/browse/ARROW-3967) - [Gandiva] [C++] Make gandiva/node.h public
* [ARROW-3970](https://issues.apache.org/jira/browse/ARROW-3970) - [Gandiva][C++] Remove unnecessary boost dependencies
* [ARROW-3971](https://issues.apache.org/jira/browse/ARROW-3971) - [Python] Remove APIs deprecated in 0.11 and prior
* [ARROW-3974](https://issues.apache.org/jira/browse/ARROW-3974) - [C++] Combine field\_builders\_ and children\_ members in array/builder.h
* [ARROW-3982](https://issues.apache.org/jira/browse/ARROW-3982) - [C++] Allow "binary" input in simple JSON format
* [ARROW-3983](https://issues.apache.org/jira/browse/ARROW-3983) - [Gandiva][Crossbow] Use static boost while packaging
* [ARROW-3984](https://issues.apache.org/jira/browse/ARROW-3984) - [C++] Exit with error if user hits zstd ExternalProject path
* [ARROW-3986](https://issues.apache.org/jira/browse/ARROW-3986) - [C++] Write prose documentation
* [ARROW-3986](https://issues.apache.org/jira/browse/ARROW-3986) - [C++] Write prose documentation
* [ARROW-3987](https://issues.apache.org/jira/browse/ARROW-3987) - [Java] Benchmark results for ARROW-1807
* [ARROW-3988](https://issues.apache.org/jira/browse/ARROW-3988) - [C++] Do not build unit tests by default in build system
* [ARROW-3993](https://issues.apache.org/jira/browse/ARROW-3993) - [JS] CI Jobs Failing
* [ARROW-3994](https://issues.apache.org/jira/browse/ARROW-3994) - [C++] Remove ARROW\_GANDIVA\_BUILD\_TESTS option
* [ARROW-3995](https://issues.apache.org/jira/browse/ARROW-3995) - [CI] Use understandable names in Travis Matrix
* [ARROW-3997](https://issues.apache.org/jira/browse/ARROW-3997) - [C++] [Doc] Clarify dictionary encoding integer signedness (and width?)
* [ARROW-4002](https://issues.apache.org/jira/browse/ARROW-4002) - [C++][Gandiva] Remove CMake version check
* [ARROW-4004](https://issues.apache.org/jira/browse/ARROW-4004) - [GLib] Replace GPU with CUDA
* [ARROW-4005](https://issues.apache.org/jira/browse/ARROW-4005) - [Plasma] [GLib] Add gplasma\_client\_disconnect()
* [ARROW-4006](https://issues.apache.org/jira/browse/ARROW-4006) - Add CODE\_OF\_CONDUCT.md
* [ARROW-4009](https://issues.apache.org/jira/browse/ARROW-4009) - [CI] Run Valgrind and C++ code coverage in different bulds
* [ARROW-4010](https://issues.apache.org/jira/browse/ARROW-4010) - [C++] Enable Travis CI scripts to only build and install only certain targets
* [ARROW-4015](https://issues.apache.org/jira/browse/ARROW-4015) - [Plasma] remove legacy interfaces for plasma manager
* [ARROW-4017](https://issues.apache.org/jira/browse/ARROW-4017) - [C++] Check and update vendored libraries
* [ARROW-4026](https://issues.apache.org/jira/browse/ARROW-4026) - [C++] Use separate modular $COMPONENT-test targets for unit tests
* [ARROW-4028](https://issues.apache.org/jira/browse/ARROW-4028) - [Rust] Merge parquet-rs codebase
* [ARROW-4029](https://issues.apache.org/jira/browse/ARROW-4029) - [C++] Define and document naming convention for internal / private header files not to be installed
* [ARROW-4030](https://issues.apache.org/jira/browse/ARROW-4030) - [CI] Use travis\_terminate to halt builds when a step fails
* [ARROW-4035](https://issues.apache.org/jira/browse/ARROW-4035) - [Ruby] Support msys2 mingw dependencies
* [ARROW-4037](https://issues.apache.org/jira/browse/ARROW-4037) - [Packaging] Remove workaround to verify 0.11.0
* [ARROW-4038](https://issues.apache.org/jira/browse/ARROW-4038) - [Rust] Add array\_ops methods for boolean AND, OR, NOT
* [ARROW-4039](https://issues.apache.org/jira/browse/ARROW-4039) - [Python] Update link to 'development.rst' page from Python README.md
* [ARROW-4042](https://issues.apache.org/jira/browse/ARROW-4042) - [Rust] Inconsistent method naming between BinaryArray and PrimitiveArray
* [ARROW-4043](https://issues.apache.org/jira/browse/ARROW-4043) - [Packaging/Docker] Python tests on alpine miss pytest dependency
* [ARROW-4044](https://issues.apache.org/jira/browse/ARROW-4044) - [Packaging/Python] Add hypothesis test dependency to pyarrow conda recipe
* [ARROW-4045](https://issues.apache.org/jira/browse/ARROW-4045) - [Packaging/Python] Add hypothesis test dependency to wheel crossbow tests
* [ARROW-4048](https://issues.apache.org/jira/browse/ARROW-4048) - [GLib] Return ChunkedArray instead of Array in gparquet\_arrow\_file\_reader\_read\_column
* [ARROW-4051](https://issues.apache.org/jira/browse/ARROW-4051) - [Gandiva] [GLib] Add support for null literal
* [ARROW-4054](https://issues.apache.org/jira/browse/ARROW-4054) - [Python] Update gtest, flatbuffers and OpenSSL in manylinux1 base image
* [ARROW-4060](https://issues.apache.org/jira/browse/ARROW-4060) - [Rust] Add Parquet/Arrow schema converter
* [ARROW-4069](https://issues.apache.org/jira/browse/ARROW-4069) - [Python] Add tests for casting from binary to utf8
* [ARROW-4075](https://issues.apache.org/jira/browse/ARROW-4075) - [Rust] Reuse array builder after calling finish()
* [ARROW-4079](https://issues.apache.org/jira/browse/ARROW-4079) - [C++] Add machine benchmarks
* [ARROW-4080](https://issues.apache.org/jira/browse/ARROW-4080) - [Rust] Improving lengthy build times in Appveyor
* [ARROW-4082](https://issues.apache.org/jira/browse/ARROW-4082) - [C++] CMake tweaks: allow RelWithDebInfo, improve FindClangTools
* [ARROW-4084](https://issues.apache.org/jira/browse/ARROW-4084) - [C++] Simplify Status and stringstream boilerplate
* [ARROW-4085](https://issues.apache.org/jira/browse/ARROW-4085) - [GLib] Use "field" for struct data type
* [ARROW-4087](https://issues.apache.org/jira/browse/ARROW-4087) - [C++] Make CSV nulls configurable
* [ARROW-4093](https://issues.apache.org/jira/browse/ARROW-4093) - [C++] Deprecated method suggests wrong method
* [ARROW-4098](https://issues.apache.org/jira/browse/ARROW-4098) - [Python] Deprecate pyarrow.open\_stream,open\_file in favor of pa.ipc.open\_stream/open\_file
* [ARROW-4100](https://issues.apache.org/jira/browse/ARROW-4100) - [Gandiva][C++] Fix regex to ignore "." character
* [ARROW-4102](https://issues.apache.org/jira/browse/ARROW-4102) - [C++] FixedSizeBinary identity cast not implemented
* [ARROW-4103](https://issues.apache.org/jira/browse/ARROW-4103) - [Documentation] Add README to docs/ root
* [ARROW-4105](https://issues.apache.org/jira/browse/ARROW-4105) - Add rust-toolchain to enforce user to use nightly toolchain for building
* [ARROW-4107](https://issues.apache.org/jira/browse/ARROW-4107) - [Python] Use ninja in pyarrow manylinux1 build
* [ARROW-4112](https://issues.apache.org/jira/browse/ARROW-4112) - [Packaging][Gandiva] Add support for deb packages
* [ARROW-4116](https://issues.apache.org/jira/browse/ARROW-4116) - [Python] Clarify in development.rst that virtualenv cannot be used with miniconda/Anaconda
* [ARROW-4122](https://issues.apache.org/jira/browse/ARROW-4122) - [C++] Initialize some uninitialized class members
* [ARROW-4127](https://issues.apache.org/jira/browse/ARROW-4127) - [Documentation] Add Docker build instructions
* [ARROW-4129](https://issues.apache.org/jira/browse/ARROW-4129) - [Python] Fix syntax problem in benchmark docs
* [ARROW-4132](https://issues.apache.org/jira/browse/ARROW-4132) - [GLib] Add more GArrowTable constructors
* [ARROW-4141](https://issues.apache.org/jira/browse/ARROW-4141) - [Ruby] Add support for creating schema from raw Ruby objects
* [ARROW-4148](https://issues.apache.org/jira/browse/ARROW-4148) - [CI/Python] Disable ORC on nightly Alpine builds
* [ARROW-4150](https://issues.apache.org/jira/browse/ARROW-4150) - [C++] Do not return buffers containing nullptr from internal allocations
* [ARROW-4151](https://issues.apache.org/jira/browse/ARROW-4151) - [Rust] Restructure project directories
* [ARROW-4152](https://issues.apache.org/jira/browse/ARROW-4152) - [GLib] Remove an example to show Torch integration
* [ARROW-4153](https://issues.apache.org/jira/browse/ARROW-4153) - [GLib] Add builder\_append\_value() for consistency
* [ARROW-4154](https://issues.apache.org/jira/browse/ARROW-4154) - [GLib] Add GArrowDecimal128DataType
* [ARROW-4155](https://issues.apache.org/jira/browse/ARROW-4155) - [Rust] Implement array\_ops::sum() for PrimitiveArray<T\>
* [ARROW-4156](https://issues.apache.org/jira/browse/ARROW-4156) - [C++] xcodebuild failure for cmake generated project
* [ARROW-4158](https://issues.apache.org/jira/browse/ARROW-4158) - [Dev] Allow maintainers to use a GitHub API token when merging pull requests
* [ARROW-4160](https://issues.apache.org/jira/browse/ARROW-4160) - [Rust] Add README and executable files to parquet
* [ARROW-4161](https://issues.apache.org/jira/browse/ARROW-4161) - [GLib] Add GPlasmaClientOptions
* [ARROW-4162](https://issues.apache.org/jira/browse/ARROW-4162) - [Ruby] Add support for creating data types from description
* [ARROW-4166](https://issues.apache.org/jira/browse/ARROW-4166) - [Ruby] Add support for saving to and loading from buffer
* [ARROW-4167](https://issues.apache.org/jira/browse/ARROW-4167) - [Gandiva] switch to arrow/util/variant
* [ARROW-4168](https://issues.apache.org/jira/browse/ARROW-4168) - [GLib] Use property to keep GArrowDataType passed in garrow\_field\_new()
* [ARROW-4172](https://issues.apache.org/jira/browse/ARROW-4172) - [Rust] more consistent naming in array builders
* [ARROW-4174](https://issues.apache.org/jira/browse/ARROW-4174) - [Ruby] Add support for building composite array from raw Ruby objects
* [ARROW-4175](https://issues.apache.org/jira/browse/ARROW-4175) - [GLib] Add support for decimal compare operators
* [ARROW-4177](https://issues.apache.org/jira/browse/ARROW-4177) - [C++] Add ThreadPool and TaskGroup microbenchmarks
* [ARROW-4183](https://issues.apache.org/jira/browse/ARROW-4183) - [Ruby] Add Arrow::Struct as an element of Arrow::StructArray
* [ARROW-4184](https://issues.apache.org/jira/browse/ARROW-4184) - [Ruby] Add Arrow::RecordBatch\#to\_table
* [ARROW-4191](https://issues.apache.org/jira/browse/ARROW-4191) - [C++] Use same CC and AR for jemalloc as for the main sources
* [ARROW-4199](https://issues.apache.org/jira/browse/ARROW-4199) - [GLib] Add garrow\_seekable\_input\_stream\_peek()
* [ARROW-4207](https://issues.apache.org/jira/browse/ARROW-4207) - [Gandiva] [GLib] Add support for IfNode
* [ARROW-4210](https://issues.apache.org/jira/browse/ARROW-4210) - [Python] Mention boost-cpp directly in the conda meta.yaml for pyarrow
* [ARROW-4211](https://issues.apache.org/jira/browse/ARROW-4211) - [GLib] Add GArrowFixedSizeBinaryDataType
* [ARROW-4214](https://issues.apache.org/jira/browse/ARROW-4214) - [Ruby] Add support for building RecordBatch from raw Ruby objects
* [ARROW-4216](https://issues.apache.org/jira/browse/ARROW-4216) - [Python] Add CUDA API docs
* [ARROW-4228](https://issues.apache.org/jira/browse/ARROW-4228) - [GLib] Add garrow\_list\_data\_type\_get\_field()
* [ARROW-4229](https://issues.apache.org/jira/browse/ARROW-4229) - [Packaging] Set crossbow target explicitly to enable building arbitrary arrow repo
* [ARROW-4233](https://issues.apache.org/jira/browse/ARROW-4233) - [Packaging] Create a Dockerfile to build source archive
* [ARROW-4239](https://issues.apache.org/jira/browse/ARROW-4239) - [Release] Updating .deb package names in the prepare script failed to run on OSX
* [ARROW-4240](https://issues.apache.org/jira/browse/ARROW-4240) - [Packaging] Documents for Plasma GLib and Gandiva GLib are missing in source archive
* [ARROW-4241](https://issues.apache.org/jira/browse/ARROW-4241) - [Packaging] Disable crossbow conda OSX clang builds
* [ARROW-4243](https://issues.apache.org/jira/browse/ARROW-4243) - [Python] Test failure with pandas 0.24.0rc1
* [ARROW-4249](https://issues.apache.org/jira/browse/ARROW-4249) - [Plasma] Remove reference to logging.h from plasma/common.h
* [ARROW-4257](https://issues.apache.org/jira/browse/ARROW-4257) - [Release] Update release verification script to check binaries on Bintray
* [ARROW-4266](https://issues.apache.org/jira/browse/ARROW-4266) - [Python][CI] Disable ORC tests in dask integration test
* [ARROW-4269](https://issues.apache.org/jira/browse/ARROW-4269) - [Python] AttributeError: module 'pandas.core' has no attribute 'arrays'
* [ARROW-4270](https://issues.apache.org/jira/browse/ARROW-4270) - [Packaging][Conda] Update xcode version and remove toolchain builds
* [ARROW-4276](https://issues.apache.org/jira/browse/ARROW-4276) - [Release] Remove needless Bintray authentication from binaries verify script
* [ARROW-4306](https://issues.apache.org/jira/browse/ARROW-4306) - [Release] Update website and add blog post announcing 0.12.0 release
* [PARQUET-690](https://issues.apache.org/jira/browse/PARQUET-690) - [C++] Investigate / improve performance of Thrift utilities
* [PARQUET-1271](https://issues.apache.org/jira/browse/PARQUET-1271) - [C++] "parquet\_reader" should be "parquet-reader"
* [PARQUET-1439](https://issues.apache.org/jira/browse/PARQUET-1439) - [C++] Parquet build fails when PARQUET\_ARROW\_LINKAGE is static
* [PARQUET-1449](https://issues.apache.org/jira/browse/PARQUET-1449) - [C++] Can't build with ARROW\_BOOST\_VENDORED=ON
* [PARQUET-1463](https://issues.apache.org/jira/browse/PARQUET-1463) - [C++] Utilize revamped common hashing machinery for dictionary encoding
* [PARQUET-1467](https://issues.apache.org/jira/browse/PARQUET-1467) - [C++] Remove ChunkedAllocator code, now unused
* [PARQUET-1473](https://issues.apache.org/jira/browse/PARQUET-1473) - [C++] Add helper function that converts ParquetVersion to human-friendly string
* [PARQUET-1484](https://issues.apache.org/jira/browse/PARQUET-1484) - [C++] Improve memory usage of FileMetaDataBuilder


## Bug Fixes

* [ARROW-1847](https://issues.apache.org/jira/browse/ARROW-1847) - [Doc] Document the difference between RecordBatch and Table in an FAQ fashion
* [ARROW-2026](https://issues.apache.org/jira/browse/ARROW-2026) - [Python] Cast all timestamp resolutions to INT96 use\_deprecated\_int96\_timestamps=True
* [ARROW-2038](https://issues.apache.org/jira/browse/ARROW-2038) - [Python] Follow-up bug fixes for s3fs Parquet support
* [ARROW-2113](https://issues.apache.org/jira/browse/ARROW-2113) - [Python] Incomplete CLASSPATH with "hadoop" contained in it can fool the classpath setting HDFS logic
* [ARROW-2591](https://issues.apache.org/jira/browse/ARROW-2591) - [Python] Segmentation fault when writing empty ListType column to Parquet
* [ARROW-2592](https://issues.apache.org/jira/browse/ARROW-2592) - [Python] Error reading old Parquet file due to metadata backwards compatibility issue
* [ARROW-2654](https://issues.apache.org/jira/browse/ARROW-2654) - [Python] Error with errno 22 when loading 3.6 GB Parquet file
* [ARROW-2708](https://issues.apache.org/jira/browse/ARROW-2708) - [C++] Internal GetValues function in arrow::compute should check for nullptr
* [ARROW-2831](https://issues.apache.org/jira/browse/ARROW-2831) - [Plasma] MemoryError in teardown
* [ARROW-2970](https://issues.apache.org/jira/browse/ARROW-2970) - [Python] NumPyConverter::Visit for Binary/String/FixedSizeBinary can overflow
* [ARROW-2987](https://issues.apache.org/jira/browse/ARROW-2987) - [Python] test\_cython\_api can fail if run in an environment where vsvarsall.bat has been run more than once
* [ARROW-3048](https://issues.apache.org/jira/browse/ARROW-3048) - [Python] Import pyarrow fails if scikit-learn is installed from conda (boost-cpp / libboost issue)
* [ARROW-3058](https://issues.apache.org/jira/browse/ARROW-3058) - [Python] Feather reads fail with unintuitive error when conversion from pandas yields ChunkedArray
* [ARROW-3186](https://issues.apache.org/jira/browse/ARROW-3186) - [GLib] mesonbuild failures in Travis CI
* [ARROW-3202](https://issues.apache.org/jira/browse/ARROW-3202) - [C++] Build does not succeed on Alpine Linux
* [ARROW-3225](https://issues.apache.org/jira/browse/ARROW-3225) - [C++/Python] Pandas object conversion of ListType<DateType\> and ListType<TimeType\>
* [ARROW-3324](https://issues.apache.org/jira/browse/ARROW-3324) - [Parquet] Free more internal resources when writing multiple row groups
* [ARROW-3343](https://issues.apache.org/jira/browse/ARROW-3343) - [Java] Java tests fail non-deterministically with memory leak from Flight tests
* [ARROW-3405](https://issues.apache.org/jira/browse/ARROW-3405) - [Python] Document CSV reader
* [ARROW-3428](https://issues.apache.org/jira/browse/ARROW-3428) - [Python] from\_pandas gives incorrect results when converting floating point to bool
* [ARROW-3436](https://issues.apache.org/jira/browse/ARROW-3436) - [C++] Boost version required by Gandiva is too new for Ubuntu 14.04
* [ARROW-3437](https://issues.apache.org/jira/browse/ARROW-3437) - [Gandiva][C++] Configure static linking of libgcc, libstdc++ with LDFLAGS
* [ARROW-3438](https://issues.apache.org/jira/browse/ARROW-3438) - [Packaging] Escaped bulletpoints in changelog
* [ARROW-3445](https://issues.apache.org/jira/browse/ARROW-3445) - [GLib] Parquet GLib doesn't link Arrow GLib
* [ARROW-3449](https://issues.apache.org/jira/browse/ARROW-3449) - [C++] Support CMake 3.2 for "out of the box" builds
* [ARROW-3466](https://issues.apache.org/jira/browse/ARROW-3466) - [Python] Crash when importing tensorflow and pyarrow
* [ARROW-3467](https://issues.apache.org/jira/browse/ARROW-3467) - Building against external double conversion is broken
* [ARROW-3470](https://issues.apache.org/jira/browse/ARROW-3470) - [C++] Row-wise conversion tutorial has fallen out of date
* [ARROW-3477](https://issues.apache.org/jira/browse/ARROW-3477) - [C++] Testsuite fails on 32 bit arch
* [ARROW-3480](https://issues.apache.org/jira/browse/ARROW-3480) - [Website] Install document for Ubuntu is broken
* [ARROW-3483](https://issues.apache.org/jira/browse/ARROW-3483) - [CI] Python 3.6 build failure on Travis-CI
* [ARROW-3485](https://issues.apache.org/jira/browse/ARROW-3485) - [C++] Examples fail with Protobuf error
* [ARROW-3494](https://issues.apache.org/jira/browse/ARROW-3494) - [C++] re2 conda-forge package not working in toolchain
* [ARROW-3498](https://issues.apache.org/jira/browse/ARROW-3498) - [R] Make IPC APIs consistent
* [ARROW-3516](https://issues.apache.org/jira/browse/ARROW-3516) - [C++] Use unsigned type for difference of pointers in parallel\_memcpy
* [ARROW-3517](https://issues.apache.org/jira/browse/ARROW-3517) - [C++] MinGW 32bit build causes g++ segv
* [ARROW-3524](https://issues.apache.org/jira/browse/ARROW-3524) - [C++] Fix compiler warnings from ARROW-3409 on clang-6
* [ARROW-3527](https://issues.apache.org/jira/browse/ARROW-3527) - [R] Unused variables in R-package C++ code
* [ARROW-3528](https://issues.apache.org/jira/browse/ARROW-3528) - [R] Typo in R documentation
* [ARROW-3535](https://issues.apache.org/jira/browse/ARROW-3535) - [Python] pip install tensorflow install too new numpy in manylinux1 build
* [ARROW-3541](https://issues.apache.org/jira/browse/ARROW-3541) - [Rust] Update BufferBuilder to allow for new bit-packed BooleanArray
* [ARROW-3544](https://issues.apache.org/jira/browse/ARROW-3544) - [Gandiva] Populate function registry in multiple compilation units to mitigate long compile times in release mode
* [ARROW-3549](https://issues.apache.org/jira/browse/ARROW-3549) - [Rust] Replace i64 with usize for some bit utility functions
* [ARROW-3573](https://issues.apache.org/jira/browse/ARROW-3573) - [Rust] with\_bitset does not set valid bits correctly
* [ARROW-3580](https://issues.apache.org/jira/browse/ARROW-3580) - [Gandiva][C++] Build error with g++ 8.2.0
* [ARROW-3586](https://issues.apache.org/jira/browse/ARROW-3586) - [Python] Segmentation fault when converting empty table to pandas with categoricals
* [ARROW-3598](https://issues.apache.org/jira/browse/ARROW-3598) - [Plasma] plasma\_store\_server fails linking with GPU enabled
* [ARROW-3613](https://issues.apache.org/jira/browse/ARROW-3613) - [Go] Resize does not correctly update the length
* [ARROW-3613](https://issues.apache.org/jira/browse/ARROW-3613) - [Go] Resize does not correctly update the length
* [ARROW-3614](https://issues.apache.org/jira/browse/ARROW-3614) - [R] Handle Type::TIMESTAMP from Arrow to R
* [ARROW-3634](https://issues.apache.org/jira/browse/ARROW-3634) - [GLib] cuda.cpp compile error
* [ARROW-3637](https://issues.apache.org/jira/browse/ARROW-3637) - [Go] Implement Stringer for arrays
* [ARROW-3658](https://issues.apache.org/jira/browse/ARROW-3658) - [Rust] validation of offsets buffer is incorrect for \`List<T\>\`
* [ARROW-3670](https://issues.apache.org/jira/browse/ARROW-3670) - [C++] Use FindBacktrace to find execinfo.h support
* [ARROW-3687](https://issues.apache.org/jira/browse/ARROW-3687) - [Rust] Anything measuring array slots should be \`usize\`
* [ARROW-3698](https://issues.apache.org/jira/browse/ARROW-3698) - [C++] Segmentation fault when using a large table in Gandiva
* [ARROW-3700](https://issues.apache.org/jira/browse/ARROW-3700) - [C++] CSV parser should allow ignoring empty lines
* [ARROW-3703](https://issues.apache.org/jira/browse/ARROW-3703) - [Python] DataFrame.to\_parquet crashes if datetime column has time zones
* [ARROW-3704](https://issues.apache.org/jira/browse/ARROW-3704) - [Gandiva] Can't build with g++ 8.2.0
* [ARROW-3707](https://issues.apache.org/jira/browse/ARROW-3707) - [C++] test failure with zstd 1.3.7
* [ARROW-3711](https://issues.apache.org/jira/browse/ARROW-3711) - [C++] Don't pass CXX\_FLAGS to C\_FLAGS
* [ARROW-3712](https://issues.apache.org/jira/browse/ARROW-3712) - [CI] License check regression (RAT failure)
* [ARROW-3715](https://issues.apache.org/jira/browse/ARROW-3715) - [C++] gflags\_ep fails to build with CMake 3.13
* [ARROW-3716](https://issues.apache.org/jira/browse/ARROW-3716) - [R] Missing cases for ChunkedArray conversion
* [ARROW-3728](https://issues.apache.org/jira/browse/ARROW-3728) - [Python] Merging Parquet Files - Pandas Meta in Schema Mismatch
* [ARROW-3734](https://issues.apache.org/jira/browse/ARROW-3734) - [C++] Linking static zstd library fails on Arch x86-64
* [ARROW-3740](https://issues.apache.org/jira/browse/ARROW-3740) - [C++] Calling ArrayBuilder::Resize with length smaller than current appended length results in invalid state
* [ARROW-3742](https://issues.apache.org/jira/browse/ARROW-3742) - Fix pyarrow.types & gandiva cython bindings
* [ARROW-3745](https://issues.apache.org/jira/browse/ARROW-3745) - [C++] CMake passes static libraries multiple times to linker
* [ARROW-3754](https://issues.apache.org/jira/browse/ARROW-3754) - [Packaging] Zstd configure error on linux package builds
* [ARROW-3756](https://issues.apache.org/jira/browse/ARROW-3756) - [CI/Docker/Java] Java tests are failing in docker-compose setup
* [ARROW-3765](https://issues.apache.org/jira/browse/ARROW-3765) - [Gandiva] Segfault when the validity bitmap has not been allocated
* [ARROW-3766](https://issues.apache.org/jira/browse/ARROW-3766) - [Python] pa.Table.from\_pandas doesn't use schema ordering
* [ARROW-3768](https://issues.apache.org/jira/browse/ARROW-3768) - [Python] set classpath to hdfs not hadoop executable
* [ARROW-3775](https://issues.apache.org/jira/browse/ARROW-3775) - [C++] Handling Parquet Arrow reads that overflow a BinaryArray capacity
* [ARROW-3790](https://issues.apache.org/jira/browse/ARROW-3790) - [C++] Signed to unsigned integer cast yields incorrect results when type sizes are the same
* [ARROW-3792](https://issues.apache.org/jira/browse/ARROW-3792) - [Python] Segmentation fault when writing empty RecordBatches to Parquet
* [ARROW-3793](https://issues.apache.org/jira/browse/ARROW-3793) - [C++] TestScalarAppendUnsafe is not testing unsafe appends
* [ARROW-3797](https://issues.apache.org/jira/browse/ARROW-3797) - [Rust] BinaryArray::value\_offset incorrect in offset case
* [ARROW-3805](https://issues.apache.org/jira/browse/ARROW-3805) - [Gandiva] handle null validity bitmap in if-else expressions
* [ARROW-3831](https://issues.apache.org/jira/browse/ARROW-3831) - [C++] arrow::util::Codec::Decompress() doesn't return decompressed data size
* [ARROW-3835](https://issues.apache.org/jira/browse/ARROW-3835) - [C++] arrow::io::CompressedOutputStream::raw() impementation is missing
* [ARROW-3837](https://issues.apache.org/jira/browse/ARROW-3837) - [C++] gflags link errors on Windows
* [ARROW-3866](https://issues.apache.org/jira/browse/ARROW-3866) - [Python] Column metadata is not transferred to tables in pyarrow
* [ARROW-3869](https://issues.apache.org/jira/browse/ARROW-3869) - [Rust] "invalid fastbin errors" since Rust nightly-2018-11-03
* [ARROW-3874](https://issues.apache.org/jira/browse/ARROW-3874) - [Gandiva] Cannot build: LLVM not detected correctly
* [ARROW-3879](https://issues.apache.org/jira/browse/ARROW-3879) - [C++] cuda-test failure
* [ARROW-3888](https://issues.apache.org/jira/browse/ARROW-3888) - [C++] Compilation warnings with gcc 7.3.0
* [ARROW-3889](https://issues.apache.org/jira/browse/ARROW-3889) - [Python] creating schema with invalid paramaters causes segmanetation fault
* [ARROW-3890](https://issues.apache.org/jira/browse/ARROW-3890) - [Python] Creating Array with explicit string type fails on Python 2.7
* [ARROW-3894](https://issues.apache.org/jira/browse/ARROW-3894) - [Python] Error reading IPC file with no record batches
* [ARROW-3898](https://issues.apache.org/jira/browse/ARROW-3898) - parquet-arrow example has compilation errors
* [ARROW-3909](https://issues.apache.org/jira/browse/ARROW-3909) - [Python] Table.from\_pandas call that seemingly should zero copy does not
* [ARROW-3918](https://issues.apache.org/jira/browse/ARROW-3918) - [Python] ParquetWriter.write\_table doesn't support coerce\_timestamps or allow\_truncated\_timestamps
* [ARROW-3920](https://issues.apache.org/jira/browse/ARROW-3920) - Plasma reference counting not properly done in TensorFlow custom operator.
* [ARROW-3931](https://issues.apache.org/jira/browse/ARROW-3931) - [C++] Make possible to build regardless of LANG
* [ARROW-3936](https://issues.apache.org/jira/browse/ARROW-3936) - Add \_O\_NOINHERIT to the file open flags on Windows
* [ARROW-3937](https://issues.apache.org/jira/browse/ARROW-3937) - [Rust] Rust nightly build is failing
* [ARROW-3940](https://issues.apache.org/jira/browse/ARROW-3940) - [Python/Documentation] Add required packages to the development instruction
* [ARROW-3941](https://issues.apache.org/jira/browse/ARROW-3941) - [R] RecordBatchStreamReader$schema
* [ARROW-3942](https://issues.apache.org/jira/browse/ARROW-3942) - [R] Feather api fixes
* [ARROW-3953](https://issues.apache.org/jira/browse/ARROW-3953) - Compat with pandas 0.24 rename of MultiIndex labels -\> codes
* [ARROW-3955](https://issues.apache.org/jira/browse/ARROW-3955) - [GLib] Add (transfer full) to free when no longer needed
* [ARROW-3957](https://issues.apache.org/jira/browse/ARROW-3957) - [Python] Better error message when user connects to HDFS cluster with wrong port
* [ARROW-3961](https://issues.apache.org/jira/browse/ARROW-3961) - [Python/Documentation] Fix wrong path in the pyarrow README
* [ARROW-3969](https://issues.apache.org/jira/browse/ARROW-3969) - [Rust] CI build broken because rustfmt not available on nightly toolchain
* [ARROW-3976](https://issues.apache.org/jira/browse/ARROW-3976) - [Ruby] Homebrew donation solicitation on CLI breaking CI builds
* [ARROW-3977](https://issues.apache.org/jira/browse/ARROW-3977) - [Gandiva] gandiva cpp tests not running in CI
* [ARROW-3979](https://issues.apache.org/jira/browse/ARROW-3979) - [Gandiva] fix all valgrind reported errors
* [ARROW-3980](https://issues.apache.org/jira/browse/ARROW-3980) - [C++] Fix CRTP use in json-simple.cc
* [ARROW-3989](https://issues.apache.org/jira/browse/ARROW-3989) - [Rust] CSV reader should handle case sensitivity for boolean values
* [ARROW-3996](https://issues.apache.org/jira/browse/ARROW-3996) - [C++] Insufficient description on build
* [ARROW-4008](https://issues.apache.org/jira/browse/ARROW-4008) - [C++] Integration test executable failure
* [ARROW-4011](https://issues.apache.org/jira/browse/ARROW-4011) - [Gandiva] Refer irhelpers.bc in build directory
* [ARROW-4019](https://issues.apache.org/jira/browse/ARROW-4019) - [C++] Fix coverity issues
* [ARROW-4033](https://issues.apache.org/jira/browse/ARROW-4033) - [C++] thirdparty/download\_dependencies.sh uses tools or options not available in older Linuxes
* [ARROW-4034](https://issues.apache.org/jira/browse/ARROW-4034) - [Ruby] Interface for FileOutputStream doesn't respect append=True
* [ARROW-4041](https://issues.apache.org/jira/browse/ARROW-4041) - [CI] Python 2.7 run uses Python 3.6
* [ARROW-4049](https://issues.apache.org/jira/browse/ARROW-4049) - [C++] Arrow never use glog even though glog is linked.
* [ARROW-4052](https://issues.apache.org/jira/browse/ARROW-4052) - [C++] Linker errors with glog and gflags
* [ARROW-4053](https://issues.apache.org/jira/browse/ARROW-4053) - [Python/Integration] HDFS Tests failing with I/O operation on closed file
* [ARROW-4055](https://issues.apache.org/jira/browse/ARROW-4055) - [Python] Fails to convert pytz.utc with versions 2018.3 and earlier
* [ARROW-4058](https://issues.apache.org/jira/browse/ARROW-4058) - [C++] arrow-io-hdfs-test fails when run against HDFS cluster from docker-compose
* [ARROW-4065](https://issues.apache.org/jira/browse/ARROW-4065) - [C++] arrowTargets.cmake is broken
* [ARROW-4066](https://issues.apache.org/jira/browse/ARROW-4066) - Instructions to create Sphinx documentation
* [ARROW-4070](https://issues.apache.org/jira/browse/ARROW-4070) - [C++] ARROW\_BOOST\_VENDORED doesn't work properly with ninja build
* [ARROW-4073](https://issues.apache.org/jira/browse/ARROW-4073) - [Python] Parquet test failures on AppVeyor
* [ARROW-4074](https://issues.apache.org/jira/browse/ARROW-4074) - [Python] test\_get\_library\_dirs\_win32 fails if libraries installed someplace different from conda or wheel packages
* [ARROW-4078](https://issues.apache.org/jira/browse/ARROW-4078) - [CI] Run Travis job where documentation is built when docs/ is changed
* [ARROW-4088](https://issues.apache.org/jira/browse/ARROW-4088) - [Python] Table.from\_batches() fails when passed a schema with metadata
* [ARROW-4089](https://issues.apache.org/jira/browse/ARROW-4089) - [Plasma] The tutorial is wrong regarding the parameter type of PlasmaClient.Create
* [ARROW-4101](https://issues.apache.org/jira/browse/ARROW-4101) - [C++] Binary identity cast not implemented
* [ARROW-4106](https://issues.apache.org/jira/browse/ARROW-4106) - [Python] Tests fail to run because hypothesis update broke its API
* [ARROW-4109](https://issues.apache.org/jira/browse/ARROW-4109) - [Packaging] Missing glog dependency from arrow-cpp conda recipe
* [ARROW-4113](https://issues.apache.org/jira/browse/ARROW-4113) - [R] Version number patch broke build
* [ARROW-4114](https://issues.apache.org/jira/browse/ARROW-4114) - [C++][DOCUMENTATION] Add "python" to Linux build instructions
* [ARROW-4115](https://issues.apache.org/jira/browse/ARROW-4115) - [Gandiva] valgrind complains that boolean output data buffer has uninited data
* [ARROW-4118](https://issues.apache.org/jira/browse/ARROW-4118) - [Python] Error with "asv run"
* [ARROW-4125](https://issues.apache.org/jira/browse/ARROW-4125) - [Python] ASV benchmarks fail to run if Plasma extension is not built (e.g. on Windows)
* [ARROW-4126](https://issues.apache.org/jira/browse/ARROW-4126) - [Go] offset not used when accessing boolean array
* [ARROW-4128](https://issues.apache.org/jira/browse/ARROW-4128) - [C++][DOCUMENTATION] Update style guide to reflect some more exceptions
* [ARROW-4130](https://issues.apache.org/jira/browse/ARROW-4130) - [Go] offset not used when accessing binary array
* [ARROW-4134](https://issues.apache.org/jira/browse/ARROW-4134) - [Packaging] Properly setup timezone in docker tests to prevent ORC adapter's abort
* [ARROW-4135](https://issues.apache.org/jira/browse/ARROW-4135) - [Python] Can't reload a pandas dataframe containing a list of datetime.time
* [ARROW-4137](https://issues.apache.org/jira/browse/ARROW-4137) - [Rust] Move parquet code into a separate crate
* [ARROW-4138](https://issues.apache.org/jira/browse/ARROW-4138) - [Python] setuptools\_scm customization does not work for versions above 0.9.0 on Windows
* [ARROW-4147](https://issues.apache.org/jira/browse/ARROW-4147) - [JAVA] Reduce heap usage for variable width vectors
* [ARROW-4149](https://issues.apache.org/jira/browse/ARROW-4149) - [CI/C++] Parquet test misses ZSTD compression codec in CMake 3.2 nightly builds
* [ARROW-4157](https://issues.apache.org/jira/browse/ARROW-4157) - [C++] -Wdocumentation failures with clang 6.0 on Ubuntu 18.04
* [ARROW-4171](https://issues.apache.org/jira/browse/ARROW-4171) - [Rust] fix parquet crate release version
* [ARROW-4173](https://issues.apache.org/jira/browse/ARROW-4173) - JIRA library name is wrong in error message of dev/merge\_arrow\_pr.py
* [ARROW-4178](https://issues.apache.org/jira/browse/ARROW-4178) - [C++] Fix TSan and UBSan errors
* [ARROW-4179](https://issues.apache.org/jira/browse/ARROW-4179) - [Python] Tests crashing on all platforms in CI
* [ARROW-4182](https://issues.apache.org/jira/browse/ARROW-4182) - [Python][CI] SEGV frequency
* [ARROW-4185](https://issues.apache.org/jira/browse/ARROW-4185) - [Rust] Appveyor builds are broken
* [ARROW-4186](https://issues.apache.org/jira/browse/ARROW-4186) - [C++] BitmapWriters clobber the first byte when length=0
* [ARROW-4188](https://issues.apache.org/jira/browse/ARROW-4188) - [Rust] There should be a README in the top level rust directory
* [ARROW-4197](https://issues.apache.org/jira/browse/ARROW-4197) - [C++] Emscripten compiler fails building Arrow
* [ARROW-4200](https://issues.apache.org/jira/browse/ARROW-4200) - [C++] conda\_env\_\* files cannot be used to create a fresh conda environment on Windows
* [ARROW-4209](https://issues.apache.org/jira/browse/ARROW-4209) - [Gandiva] returning IR structs causes issues with windows
* [ARROW-4215](https://issues.apache.org/jira/browse/ARROW-4215) - [GLib] Fix typos in documentation
* [ARROW-4227](https://issues.apache.org/jira/browse/ARROW-4227) - [GLib] Field in composite data type returns wrong data type
* [ARROW-4237](https://issues.apache.org/jira/browse/ARROW-4237) - [Packaging] Fix CMAKE\_INSTALL\_LIBDIR in release verification script
* [ARROW-4238](https://issues.apache.org/jira/browse/ARROW-4238) - [Packaging] Fix RC version conflict between crossbow and rake
* [ARROW-4246](https://issues.apache.org/jira/browse/ARROW-4246) - [Plasma][Python] PlasmaClient.list doesn't work with CUDA enabled Plasma
* [ARROW-4246](https://issues.apache.org/jira/browse/ARROW-4246) - [Plasma][Python] PlasmaClient.list doesn't work with CUDA enabled Plasma
* [ARROW-4256](https://issues.apache.org/jira/browse/ARROW-4256) - [Release] Update Windows verification script for 0.12 release
* [ARROW-4258](https://issues.apache.org/jira/browse/ARROW-4258) - [Python] Safe cast fails from numpy float64 array with nans to integer
* [ARROW-4260](https://issues.apache.org/jira/browse/ARROW-4260) - [Python] test\_serialize\_deserialize\_pandas is failing in multiple build entries
* [PARQUET-1426](https://issues.apache.org/jira/browse/PARQUET-1426) - [C++] parquet-dump-schema has poor usability
* [PARQUET-1458](https://issues.apache.org/jira/browse/PARQUET-1458) - [C++] parquet::CompressionToString not recognizing brotli compression
* [PARQUET-1469](https://issues.apache.org/jira/browse/PARQUET-1469) - [C++] DefinitionLevelsToBitmap can overwrite prior decoded data
* [PARQUET-1471](https://issues.apache.org/jira/browse/PARQUET-1471) - [C++] Out of bounds access in statistics UpdateSpaced when writing optional list with null list slots
* [PARQUET-1481](https://issues.apache.org/jira/browse/PARQUET-1481) - [C++] SEGV when reading corrupt parquet file



# Apache Arrow 0.11.1 (2018-10-23)

## New Features and Improvements

* [ARROW-3353](https://issues.apache.org/jira/browse/ARROW-3353) - [Packaging] Build python 3.7 wheels
* [ARROW-3534](https://issues.apache.org/jira/browse/ARROW-3534) - [Python] Update zlib library in manylinux1 image
* [ARROW-3546](https://issues.apache.org/jira/browse/ARROW-3546) - [Python] Provide testing setup to verify wheel binaries work in one or more common Linux distributions
* [ARROW-3565](https://issues.apache.org/jira/browse/ARROW-3565) - [Python] Pin tensorflow to 1.11.0 in manylinux1 container


## Bug Fixes

* [ARROW-3514](https://issues.apache.org/jira/browse/ARROW-3514) - [Python] zlib deflate exception when writing Parquet file
* [ARROW-3907](https://issues.apache.org/jira/browse/ARROW-3907) - [Python] from\_pandas errors when schemas are used with lower resolution timestamps



# Apache Arrow 0.11.0 (2018-10-08)

## New Features and Improvements

* [ARROW-25](https://issues.apache.org/jira/browse/ARROW-25) - [C++] Implement delimited file scanner / CSV reader
* [ARROW-249](https://issues.apache.org/jira/browse/ARROW-249) - [Flight] Define GRPC IDL / wire protocol for messaging with Arrow data
* [ARROW-614](https://issues.apache.org/jira/browse/ARROW-614) - [C++] Use glog (or some other tool) to print stack traces in debug builds on errors
* [ARROW-1325](https://issues.apache.org/jira/browse/ARROW-1325) - [R] Bootstrap R bindings subproject
* [ARROW-1424](https://issues.apache.org/jira/browse/ARROW-1424) - [Python] Initial bindings for libarrow\_gpu
* [ARROW-1491](https://issues.apache.org/jira/browse/ARROW-1491) - [C++] Add casting implementations from strings to numbers or boolean
* [ARROW-1521](https://issues.apache.org/jira/browse/ARROW-1521) - [C++] Add Reset method to BufferOutputStream to enable object reuse
* [ARROW-1563](https://issues.apache.org/jira/browse/ARROW-1563) - [C++] Implement logical unary and binary kernels for boolean arrays
* [ARROW-1563](https://issues.apache.org/jira/browse/ARROW-1563) - [C++] Implement logical unary and binary kernels for boolean arrays
* [ARROW-1860](https://issues.apache.org/jira/browse/ARROW-1860) - [C++] Add data structure to "stage" a sequence of IPC messages from in-memory data
* [ARROW-1949](https://issues.apache.org/jira/browse/ARROW-1949) - [Python/C++] Add option to Array.from\_pandas and pyarrow.array to perform unsafe casts
* [ARROW-1963](https://issues.apache.org/jira/browse/ARROW-1963) - [C++/Python] Create Array from sequence of numpy.datetime64
* [ARROW-1968](https://issues.apache.org/jira/browse/ARROW-1968) - [Python] Unit testing setup for ORC files
* [ARROW-2165](https://issues.apache.org/jira/browse/ARROW-2165) - enhance AllocatorListener to listen for child allocator addition and removal
* [ARROW-2338](https://issues.apache.org/jira/browse/ARROW-2338) - [Scripts] Windows release verification script should create a conda environment
* [ARROW-2352](https://issues.apache.org/jira/browse/ARROW-2352) - [C++/Python] Test OSX packaging in Travis matrix
* [ARROW-2519](https://issues.apache.org/jira/browse/ARROW-2519) - [Rust] Implement min/max for primitive arrays
* [ARROW-2520](https://issues.apache.org/jira/browse/ARROW-2520) - [Rust] CI should also build against nightly Rust
* [ARROW-2555](https://issues.apache.org/jira/browse/ARROW-2555) - [Python] Provide an option to convert on coerce\_timestamps instead of error
* [ARROW-2583](https://issues.apache.org/jira/browse/ARROW-2583) - [Rust] Buffer should be typeless
* [ARROW-2617](https://issues.apache.org/jira/browse/ARROW-2617) - [Rust] Schema should contain fields not columns
* [ARROW-2687](https://issues.apache.org/jira/browse/ARROW-2687) - [JS] Example usage in README is outdated
* [ARROW-2734](https://issues.apache.org/jira/browse/ARROW-2734) - [Python] Cython api example doesn't work by default on macOS
* [ARROW-2750](https://issues.apache.org/jira/browse/ARROW-2750) - [MATLAB] Add MATLAB support for reading numeric types from Feather files
* [ARROW-2799](https://issues.apache.org/jira/browse/ARROW-2799) - [Python] Add safe option to Table.from\_pandas to avoid unsafe casts
* [ARROW-2813](https://issues.apache.org/jira/browse/ARROW-2813) - [C++] Strip uninformative lcov output from Travis CI logs
* [ARROW-2813](https://issues.apache.org/jira/browse/ARROW-2813) - [C++] Strip uninformative lcov output from Travis CI logs
* [ARROW-2817](https://issues.apache.org/jira/browse/ARROW-2817) - [C++] Enable libraries to be installed in msys2 on Windows
* [ARROW-2840](https://issues.apache.org/jira/browse/ARROW-2840) - [C++] See if stream alignment logic can be simplified
* [ARROW-2865](https://issues.apache.org/jira/browse/ARROW-2865) - [C++/Python] Reduce some duplicated code in python/builtin\_convert.cc
* [ARROW-2889](https://issues.apache.org/jira/browse/ARROW-2889) - [C++] Add optional argument to ADD\_ARROW\_TEST CMake function to add unit test prefix
* [ARROW-2900](https://issues.apache.org/jira/browse/ARROW-2900) - [Python] Improve performance of appending nested NumPy arrays in builtin\_convert.cc
* [ARROW-2936](https://issues.apache.org/jira/browse/ARROW-2936) - [Python] Implement Table.cast for casting from one schema to another (if possible)
* [ARROW-2948](https://issues.apache.org/jira/browse/ARROW-2948) - [Packaging] Generate changelog with crossbow
* [ARROW-2950](https://issues.apache.org/jira/browse/ARROW-2950) - [C++] Clean up util/bit-util.h
* [ARROW-2952](https://issues.apache.org/jira/browse/ARROW-2952) - [C++] Dockerfile for running include-what-you-use checks
* [ARROW-2958](https://issues.apache.org/jira/browse/ARROW-2958) - [C++] Flatbuffers EP fails to compile with GCC 8.1
* [ARROW-2960](https://issues.apache.org/jira/browse/ARROW-2960) - [Packaging] Fix verify-release-candidate for binary packages and fix release cutting script for lib64 cmake issue
* [ARROW-2964](https://issues.apache.org/jira/browse/ARROW-2964) - [Go] wire all currently implemented array types in array.MakeFromData
* [ARROW-2971](https://issues.apache.org/jira/browse/ARROW-2971) - [Python] Give more descriptive names to python\_to\_arrow.cc/arrow\_to\_python.cc
* [ARROW-2972](https://issues.apache.org/jira/browse/ARROW-2972) - [Python] Implement inference logic for uint64 conversions in builtin\_convert.cc
* [ARROW-2975](https://issues.apache.org/jira/browse/ARROW-2975) - [Plasma] TensorFlow op: Compilation only working if arrow found by pkg-config
* [ARROW-2976](https://issues.apache.org/jira/browse/ARROW-2976) - [Python] Directory in pyarrow.get\_library\_dirs() on Travis doesn't contain libarrow.so
* [ARROW-2979](https://issues.apache.org/jira/browse/ARROW-2979) - [GLib] Add operator functions in GArrowDecimal128
* [ARROW-2983](https://issues.apache.org/jira/browse/ARROW-2983) - [Packaging] Verify source release and binary artifacts in different scripts
* [ARROW-2989](https://issues.apache.org/jira/browse/ARROW-2989) - [C++] Remove deprecated APIs in 0.10.0 and below
* [ARROW-2991](https://issues.apache.org/jira/browse/ARROW-2991) - [CI] Cut down number of AppVeyor jobs
* [ARROW-2994](https://issues.apache.org/jira/browse/ARROW-2994) - [C++] Only include Python C header directories for Python-related compilation units
* [ARROW-2996](https://issues.apache.org/jira/browse/ARROW-2996) - [C++] Fix typo in cpp/.clang-tidy
* [ARROW-2998](https://issues.apache.org/jira/browse/ARROW-2998) - [C++] Add variants of AllocateBuffer, AllocateResizeableBuffer that return unique\_ptr<Buffer\>
* [ARROW-2999](https://issues.apache.org/jira/browse/ARROW-2999) - [Python] Do not run ASV benchmarks in every Travis CI build to improve runtimes
* [ARROW-3000](https://issues.apache.org/jira/browse/ARROW-3000) - [Python] Do not build unit tests other than python-test in travis\_script\_python.sh
* [ARROW-3001](https://issues.apache.org/jira/browse/ARROW-3001) - [Packaging] Don't modify PATH during rust release verification
* [ARROW-3002](https://issues.apache.org/jira/browse/ARROW-3002) - [Python] Implement better DataType hash function
* [ARROW-3003](https://issues.apache.org/jira/browse/ARROW-3003) - [Doc] Enable Java doc in dev/gen\_apidocs/create\_documents.sh
* [ARROW-3005](https://issues.apache.org/jira/browse/ARROW-3005) - [Website] Update website and write blog post for 0.10.0 release announcement
* [ARROW-3008](https://issues.apache.org/jira/browse/ARROW-3008) - [Packaging] Verify GPU related modules if available
* [ARROW-3009](https://issues.apache.org/jira/browse/ARROW-3009) - [Python] pyarrow.orc uses APIs now prohibited in 0.10.0
* [ARROW-3010](https://issues.apache.org/jira/browse/ARROW-3010) - [GLib] Update README to use Bundler
* [ARROW-3017](https://issues.apache.org/jira/browse/ARROW-3017) - [C++] Don't throw exception in arrow/util/thread-pool.h
* [ARROW-3018](https://issues.apache.org/jira/browse/ARROW-3018) - [Plasma] Improve random ObjectID generation
* [ARROW-3018](https://issues.apache.org/jira/browse/ARROW-3018) - [Plasma] Improve random ObjectID generation
* [ARROW-3019](https://issues.apache.org/jira/browse/ARROW-3019) - [Packaging] Use Bundler to verify Arrow GLib
* [ARROW-3021](https://issues.apache.org/jira/browse/ARROW-3021) - [Go] support for List
* [ARROW-3022](https://issues.apache.org/jira/browse/ARROW-3022) - [Go] support for Struct
* [ARROW-3023](https://issues.apache.org/jira/browse/ARROW-3023) - [C++] Use gold linker in builds if it is available
* [ARROW-3024](https://issues.apache.org/jira/browse/ARROW-3024) - [C++] Replace usages of std::mutex with atomics in memory\_pool.cc
* [ARROW-3025](https://issues.apache.org/jira/browse/ARROW-3025) - [C++] Add option to switch between dynamic and static linking in unit test executables
* [ARROW-3026](https://issues.apache.org/jira/browse/ARROW-3026) - [Plasma] Only run Plasma Python unit tests under valgrind once instead of twice in CI
* [ARROW-3027](https://issues.apache.org/jira/browse/ARROW-3027) - [Ruby] Stop "git tag" by "rake release"
* [ARROW-3028](https://issues.apache.org/jira/browse/ARROW-3028) - [Python] Trim unneeded work from documentation build in Travis CI
* [ARROW-3029](https://issues.apache.org/jira/browse/ARROW-3029) - [Python] pkg\_resources is slow
* [ARROW-3031](https://issues.apache.org/jira/browse/ARROW-3031) - [Go] Streamline release of Arrays and Builders
* [ARROW-3033](https://issues.apache.org/jira/browse/ARROW-3033) - [Dev] docker-compose test tooling does not seem to cache built Docker images
* [ARROW-3034](https://issues.apache.org/jira/browse/ARROW-3034) - [Packaging] Source archive can't be extracted by bsdtar on MSYS2
* [ARROW-3035](https://issues.apache.org/jira/browse/ARROW-3035) - [Rust] Examples in README.md do not run
* [ARROW-3036](https://issues.apache.org/jira/browse/ARROW-3036) - [Go] add support for slicing Arrays
* [ARROW-3037](https://issues.apache.org/jira/browse/ARROW-3037) - [Go] add support NullArray
* [ARROW-3042](https://issues.apache.org/jira/browse/ARROW-3042) - [Go] add badge to GoDoc in the Go-Arrow README
* [ARROW-3043](https://issues.apache.org/jira/browse/ARROW-3043) - [C++] pthread doesn't exist on MinGW
* [ARROW-3044](https://issues.apache.org/jira/browse/ARROW-3044) - [Python] Remove all occurrences of cython's legacy property definition syntax
* [ARROW-3045](https://issues.apache.org/jira/browse/ARROW-3045) - [Python] Remove nullcheck from ipc Message and MessageReader
* [ARROW-3046](https://issues.apache.org/jira/browse/ARROW-3046) - [GLib] Use rubyish method in test-orc-file-reader.rb
* [ARROW-3050](https://issues.apache.org/jira/browse/ARROW-3050) - [C++] Adopt HiveServer2 client C++ codebase
* [ARROW-3051](https://issues.apache.org/jira/browse/ARROW-3051) - [C++] Status performance optimization from Impala/Kudu
* [ARROW-3057](https://issues.apache.org/jira/browse/ARROW-3057) - [INTEGRATION] Fix spark and hdfs dockerfiles
* [ARROW-3059](https://issues.apache.org/jira/browse/ARROW-3059) - [C++] Streamline namespace array::test
* [ARROW-3060](https://issues.apache.org/jira/browse/ARROW-3060) - [C++] Factor out parsing routines
* [ARROW-3062](https://issues.apache.org/jira/browse/ARROW-3062) - [Python] Extend fast libtensorflow\_framework.so compatibility workaround to Python 2.7
* [ARROW-3064](https://issues.apache.org/jira/browse/ARROW-3064) - [C++] Add option to ADD\_ARROW\_TEST to indicate additional dependencies for particular unit test executables
* [ARROW-3067](https://issues.apache.org/jira/browse/ARROW-3067) - [Packaging] Support dev/rc/release .deb/.rpm builds
* [ARROW-3068](https://issues.apache.org/jira/browse/ARROW-3068) - [Packaging] Bump version to 0.11.0-SNAPSHOT
* [ARROW-3069](https://issues.apache.org/jira/browse/ARROW-3069) - [Release] Stop using SHA1 checksums per ASF policy
* [ARROW-3072](https://issues.apache.org/jira/browse/ARROW-3072) - [C++] Use ARROW\_RETURN\_NOT\_OK instead of RETURN\_NOT\_OK in header files
* [ARROW-3075](https://issues.apache.org/jira/browse/ARROW-3075) - [C++] Incorporate apache/parquet-cpp codebase into Arrow C++ codebase and build system
* [ARROW-3076](https://issues.apache.org/jira/browse/ARROW-3076) - [Website] Add Google Analytics tags to C++, Python API docs
* [ARROW-3088](https://issues.apache.org/jira/browse/ARROW-3088) - [Rust] Use internal \`Result<T\>\` type instead of \`Result<T, ArrowError\>\`
* [ARROW-3090](https://issues.apache.org/jira/browse/ARROW-3090) - [Rust] Accompany error messages with assertions
* [ARROW-3094](https://issues.apache.org/jira/browse/ARROW-3094) - [Python] Allow lighter construction of pa.Schema / pa.StructType
* [ARROW-3099](https://issues.apache.org/jira/browse/ARROW-3099) - [C++] Add benchmark for number parsing
* [ARROW-3105](https://issues.apache.org/jira/browse/ARROW-3105) - [Plasma] Improve flushing error message
* [ARROW-3106](https://issues.apache.org/jira/browse/ARROW-3106) - [Website] Update committers and PMC roster on website
* [ARROW-3109](https://issues.apache.org/jira/browse/ARROW-3109) - [Python] Add Python 3.7 virtualenvs to manylinux1 container
* [ARROW-3110](https://issues.apache.org/jira/browse/ARROW-3110) - [C++] Compilation warnings with gcc 7.3.0
* [ARROW-3111](https://issues.apache.org/jira/browse/ARROW-3111) - [Java] Enable changing default logging level when running tests
* [ARROW-3114](https://issues.apache.org/jira/browse/ARROW-3114) - [Website] Add information about user@ mailing list to website / Community page
* [ARROW-3115](https://issues.apache.org/jira/browse/ARROW-3115) - [Java] Style Checks - Fix import ordering
* [ARROW-3116](https://issues.apache.org/jira/browse/ARROW-3116) - [Plasma] Add "ls" to object store
* [ARROW-3117](https://issues.apache.org/jira/browse/ARROW-3117) - [GLib] Add garrow\_chunked\_array\_to\_string()
* [ARROW-3119](https://issues.apache.org/jira/browse/ARROW-3119) - [Packaging] Nightly packaging script fails
* [ARROW-3127](https://issues.apache.org/jira/browse/ARROW-3127) - [C++] Add Tutorial about Sending Tensor from C++ to Python
* [ARROW-3128](https://issues.apache.org/jira/browse/ARROW-3128) - [C++] Support system shared zlib
* [ARROW-3129](https://issues.apache.org/jira/browse/ARROW-3129) - [Packaging] Stop to use deprecated BuildRoot and Group in .rpm
* [ARROW-3130](https://issues.apache.org/jira/browse/ARROW-3130) - [Go] add initial support for Go modules
* [ARROW-3136](https://issues.apache.org/jira/browse/ARROW-3136) - [C++] Clean up arrow:: public API
* [ARROW-3142](https://issues.apache.org/jira/browse/ARROW-3142) - [C++] Fetch all libs from toolchain environment
* [ARROW-3143](https://issues.apache.org/jira/browse/ARROW-3143) - [C++] CopyBitmap into existing memory
* [ARROW-3146](https://issues.apache.org/jira/browse/ARROW-3146) - [C++] Barebones Flight RPC server and client implementations
* [ARROW-3147](https://issues.apache.org/jira/browse/ARROW-3147) - [C++] MSVC version isn't detected in code page 932
* [ARROW-3148](https://issues.apache.org/jira/browse/ARROW-3148) - [C++]  MSVC shows C4819 warning on code page 932
* [ARROW-3152](https://issues.apache.org/jira/browse/ARROW-3152) - [C++][Packaging] Use dynamic linking for zlib in conda recipes
* [ARROW-3153](https://issues.apache.org/jira/browse/ARROW-3153) - [Packaging] Fix broken nightly package builds introduced with recent cmake changes and orc tests
* [ARROW-3157](https://issues.apache.org/jira/browse/ARROW-3157) - [C++] Improve buffer creation for typed data
* [ARROW-3158](https://issues.apache.org/jira/browse/ARROW-3158) - [C++] Handle float truncation during casting
* [ARROW-3160](https://issues.apache.org/jira/browse/ARROW-3160) - [Python] Improve pathlib.Path support in parquet and filesystem modules
* [ARROW-3163](https://issues.apache.org/jira/browse/ARROW-3163) - [Python] Cython dependency is missing in non wheel package
* [ARROW-3167](https://issues.apache.org/jira/browse/ARROW-3167) - [CI] Limit clcache cache size
* [ARROW-3168](https://issues.apache.org/jira/browse/ARROW-3168) - [C++] Restore pkgconfig for Parquet C++ libraries
* [ARROW-3170](https://issues.apache.org/jira/browse/ARROW-3170) - [C++] Implement "readahead spooler" class for background input buffering
* [ARROW-3171](https://issues.apache.org/jira/browse/ARROW-3171) - [Java] checkstyle - fix line length and indentation
* [ARROW-3172](https://issues.apache.org/jira/browse/ARROW-3172) - [Rust] Update documentation for datatypes.rs
* [ARROW-3174](https://issues.apache.org/jira/browse/ARROW-3174) - [Rust] run examples as part of CI
* [ARROW-3177](https://issues.apache.org/jira/browse/ARROW-3177) - [Rust] Update expected error messages for tests that 'should panic'
* [ARROW-3180](https://issues.apache.org/jira/browse/ARROW-3180) - [C++] Add docker-compose setup to simulate Travis CI run locally
* [ARROW-3181](https://issues.apache.org/jira/browse/ARROW-3181) - [Packaging] Adjust conda package scripts to account for Parquet codebase migration
* [ARROW-3182](https://issues.apache.org/jira/browse/ARROW-3182) - [C++] Merge Gandiva codebase
* [ARROW-3187](https://issues.apache.org/jira/browse/ARROW-3187) - [Plasma] Make Plasma Log pluggable with glog
* [ARROW-3195](https://issues.apache.org/jira/browse/ARROW-3195) - [C++] NumPy initialization error check is missing in test
* [ARROW-3196](https://issues.apache.org/jira/browse/ARROW-3196) - Enable merge\_arrow\_py.py script to merge Parquet patches and set fix versions
* [ARROW-3197](https://issues.apache.org/jira/browse/ARROW-3197) - [C++] Add instructions to cpp/README.md about Parquet-only development and Arrow+Parquet
* [ARROW-3198](https://issues.apache.org/jira/browse/ARROW-3198) - [Website] Blog post for 0.11 release
* [ARROW-3211](https://issues.apache.org/jira/browse/ARROW-3211) - [C++] gold linker doesn't work with MinGW-w64
* [ARROW-3212](https://issues.apache.org/jira/browse/ARROW-3212) - [C++] Create deterministic IPC metadata
* [ARROW-3213](https://issues.apache.org/jira/browse/ARROW-3213) - [C++] Use CMake to build vendored Snappy on Windows
* [ARROW-3214](https://issues.apache.org/jira/browse/ARROW-3214) - [C++] Disable insecure warnings with MinGW build
* [ARROW-3215](https://issues.apache.org/jira/browse/ARROW-3215) - [C++] Add support for finding libpython on MSYS2
* [ARROW-3216](https://issues.apache.org/jira/browse/ARROW-3216) - [C++] libpython isn't linked to libarrow\_python in MinGW build
* [ARROW-3217](https://issues.apache.org/jira/browse/ARROW-3217) - [C++] ARROW\_STATIC definition is missing in MinGW build
* [ARROW-3218](https://issues.apache.org/jira/browse/ARROW-3218) - [C++] Utilities has needless pthread link in MinGW build
* [ARROW-3219](https://issues.apache.org/jira/browse/ARROW-3219) - [C++] Use Win32 API in MinGW
* [ARROW-3223](https://issues.apache.org/jira/browse/ARROW-3223) - [GLib] Use the same shared object versioning rule in C++
* [ARROW-3229](https://issues.apache.org/jira/browse/ARROW-3229) - [Packaging]: Adjust wheel package scripts to account for Parquet codebase migration
* [ARROW-3234](https://issues.apache.org/jira/browse/ARROW-3234) - [C++] Link order is wrong when ARROW\_ORC=on and ARROW\_PROTOBUF\_USE\_SHARED=ON
* [ARROW-3235](https://issues.apache.org/jira/browse/ARROW-3235) - [Packaging] Update deb names
* [ARROW-3236](https://issues.apache.org/jira/browse/ARROW-3236) - [C++] OutputStream bookkeeping logic when writing IPC file format is incorrect
* [ARROW-3240](https://issues.apache.org/jira/browse/ARROW-3240) - [GLib] Add build instructions using Meson
* [ARROW-3242](https://issues.apache.org/jira/browse/ARROW-3242) - [C++] Use coarser-grained dispatch to SIMD hash functions
* [ARROW-3249](https://issues.apache.org/jira/browse/ARROW-3249) - [Python] Run flake8 on integration\_test.py and crossbow.py
* [ARROW-3250](https://issues.apache.org/jira/browse/ARROW-3250) - [C++] Create Buffer implementation that takes ownership for the memory from a std::string via std::move
* [ARROW-3252](https://issues.apache.org/jira/browse/ARROW-3252) - [C++] Do not hard code the "v" part of versions in thirdparty toolchain
* [ARROW-3257](https://issues.apache.org/jira/browse/ARROW-3257) - [C++] Stop to use IMPORTED\_LINK\_INTERFACE\_LIBRARIES
* [ARROW-3258](https://issues.apache.org/jira/browse/ARROW-3258) - [GLib] CI is failued on macOS
* [ARROW-3259](https://issues.apache.org/jira/browse/ARROW-3259) - [GLib] Rename "writeable" to "writable"
* [ARROW-3261](https://issues.apache.org/jira/browse/ARROW-3261) - [Python] Add "field" method to select fields from StructArray
* [ARROW-3262](https://issues.apache.org/jira/browse/ARROW-3262) - [Python] Implement \_\_getitem\_\_ with integers on pyarrow.Column
* [ARROW-3264](https://issues.apache.org/jira/browse/ARROW-3264) - [Java] checkstyle - fix whitespace
* [ARROW-3267](https://issues.apache.org/jira/browse/ARROW-3267) - [Python] Create empty table from schema
* [ARROW-3268](https://issues.apache.org/jira/browse/ARROW-3268) - [CI] Reduce conda times on AppVeyor
* [ARROW-3269](https://issues.apache.org/jira/browse/ARROW-3269) - [Python] Fix warnings in unit test suite
* [ARROW-3270](https://issues.apache.org/jira/browse/ARROW-3270) - [Release] Adjust release verification scripts to recent parquet migration
* [ARROW-3274](https://issues.apache.org/jira/browse/ARROW-3274) - [Packaging] Missing glog dependency from conda-forge recipes
* [ARROW-3276](https://issues.apache.org/jira/browse/ARROW-3276) - [Packaging] Add support Parquet related Linux packages
* [ARROW-3281](https://issues.apache.org/jira/browse/ARROW-3281) - [Java] Make sure that WritableByteChannel in WriteChannel writes out complete bytes
* [ARROW-3282](https://issues.apache.org/jira/browse/ARROW-3282) - [R] initial R functionality
* [ARROW-3284](https://issues.apache.org/jira/browse/ARROW-3284) - [R] Adding R Error in Status
* [ARROW-3285](https://issues.apache.org/jira/browse/ARROW-3285) - [GLib] Add arrow\_cpp\_build\_type and arrow\_cpp\_build\_dir Meson options
* [ARROW-3286](https://issues.apache.org/jira/browse/ARROW-3286) - [C++] ARROW\_EXPORT for RecordBatchBuilder is missing
* [ARROW-3287](https://issues.apache.org/jira/browse/ARROW-3287) - [C++] "redeclared without dllimport attribute after being referenced with dll linkage" with MinGW
* [ARROW-3288](https://issues.apache.org/jira/browse/ARROW-3288) - [GLib] Add new API index for 0.11.0
* [ARROW-3300](https://issues.apache.org/jira/browse/ARROW-3300) - [Release] Update .deb package names in preparation
* [ARROW-3301](https://issues.apache.org/jira/browse/ARROW-3301) - [Website] Update Jekyll and Bootstrap 4
* [ARROW-3305](https://issues.apache.org/jira/browse/ARROW-3305) - [JS] Incorrect development documentation link in javascript readme
* [ARROW-3309](https://issues.apache.org/jira/browse/ARROW-3309) - [JS] Missing links from DEVELOP.md
* [ARROW-3313](https://issues.apache.org/jira/browse/ARROW-3313) - [R] Run clang-format, cpplint checks on R C++ code
* [ARROW-3313](https://issues.apache.org/jira/browse/ARROW-3313) - [R] Run clang-format, cpplint checks on R C++ code
* [ARROW-3319](https://issues.apache.org/jira/browse/ARROW-3319) - [GLib] Expose AlignStream methods in InputStream, OutputStream classes
* [ARROW-3320](https://issues.apache.org/jira/browse/ARROW-3320) - [C++] Improve float parsing performance
* [ARROW-3321](https://issues.apache.org/jira/browse/ARROW-3321) - [C++] Improve integer parsing performance
* [ARROW-3334](https://issues.apache.org/jira/browse/ARROW-3334) - [Python] Update conda packages to new numpy requirement
* [ARROW-3335](https://issues.apache.org/jira/browse/ARROW-3335) - [Python] Add ccache to manylinux1 container
* [ARROW-3339](https://issues.apache.org/jira/browse/ARROW-3339) - [R] Support for character vectors
* [ARROW-3341](https://issues.apache.org/jira/browse/ARROW-3341) - [R] Support for logical vector
* [ARROW-3349](https://issues.apache.org/jira/browse/ARROW-3349) - [C++] Use aligned API in MinGW
* [ARROW-3350](https://issues.apache.org/jira/browse/ARROW-3350) - [Website] Fix powered by links
* [ARROW-3352](https://issues.apache.org/jira/browse/ARROW-3352) - [Packaging] Fix recently failing wheel builds
* [ARROW-3356](https://issues.apache.org/jira/browse/ARROW-3356) - [Python] Document parameters of Table.to\_pandas method
* [ARROW-3357](https://issues.apache.org/jira/browse/ARROW-3357) - [Rust] Add a mutable buffer implementation
* [ARROW-3360](https://issues.apache.org/jira/browse/ARROW-3360) - [GLib] Import Parquet bindings
* [ARROW-3363](https://issues.apache.org/jira/browse/ARROW-3363) - [C++/Python] Add helper functions to detect scalar Python types
* [ARROW-3371](https://issues.apache.org/jira/browse/ARROW-3371) - [Python] Remove check\_metadata argument for Field.equals docstring
* [ARROW-3375](https://issues.apache.org/jira/browse/ARROW-3375) - [Rust] Remove memory\_pool.rs
* [ARROW-3376](https://issues.apache.org/jira/browse/ARROW-3376) - [C++] Add double-conversion to cpp/thirdparty/download\_dependencies.sh
* [ARROW-3377](https://issues.apache.org/jira/browse/ARROW-3377) - [Gandiva][C++] Remove If statement from bit map set function
* [ARROW-3382](https://issues.apache.org/jira/browse/ARROW-3382) - [C++] Run Gandiva tests in Travis CI
* [ARROW-3392](https://issues.apache.org/jira/browse/ARROW-3392) - [Python] Support filters in disjunctive normal form in ParquetDataset
* [ARROW-3395](https://issues.apache.org/jira/browse/ARROW-3395) - [C++/Python] Add docker container for linting
* [ARROW-3397](https://issues.apache.org/jira/browse/ARROW-3397) - [C++] Use relative CMake path for modules
* [ARROW-3400](https://issues.apache.org/jira/browse/ARROW-3400) - [Packaging] Add support Parquet GLib related Linux packages
* [ARROW-3404](https://issues.apache.org/jira/browse/ARROW-3404) - [C++] Make CSV chunker faster
* [ARROW-3411](https://issues.apache.org/jira/browse/ARROW-3411) - [Packaging] dev/release/01-perform.sh doesn't have executable bit
* [ARROW-3412](https://issues.apache.org/jira/browse/ARROW-3412) - [Packaging] rat failure in dev/release/02-source.sh
* [ARROW-3413](https://issues.apache.org/jira/browse/ARROW-3413) - [Packaging] dev/release/02-source.sh doesn't generate Parquet GLib document
* [ARROW-3415](https://issues.apache.org/jira/browse/ARROW-3415) - [Packaging] dev/release/verify-release-cndidate.sh fails in "conda activate arrow-test"
* [ARROW-3416](https://issues.apache.org/jira/browse/ARROW-3416) - [Packaging] dev/release/02-source.sh must use SHA512 instead of SHA1
* [ARROW-3417](https://issues.apache.org/jira/browse/ARROW-3417) - [Packaging] dev/release/verify-release-cndidate.sh fails Parquet C++ test
* [ARROW-3418](https://issues.apache.org/jira/browse/ARROW-3418) - [C++] Update Parquet snapshot version for release
* [ARROW-3423](https://issues.apache.org/jira/browse/ARROW-3423) - [Packaging] Remove RC information from deb/rpm
* [ARROW-3443](https://issues.apache.org/jira/browse/ARROW-3443) - [Java] Flight reports memory leaks in TestBasicOperation
* [PARQUET-169](https://issues.apache.org/jira/browse/PARQUET-169) - Parquet-cpp: Implement support for bulk reading and writing repetition/definition levels.
* [PARQUET-267](https://issues.apache.org/jira/browse/PARQUET-267) - Detach thirdparty code from build configuration.
* [PARQUET-416](https://issues.apache.org/jira/browse/PARQUET-416) - C++11, cpplint cleanup, package target and header installation
* [PARQUET-418](https://issues.apache.org/jira/browse/PARQUET-418) - Add a utility to print contents of a Parquet file to stdout
* [PARQUET-428](https://issues.apache.org/jira/browse/PARQUET-428) - Support INT96 and FIXED\_LEN\_BYTE\_ARRAY types
* [PARQUET-434](https://issues.apache.org/jira/browse/PARQUET-434) - Add a ParquetFileReader class to encapsulate some low-level details of interacting with Parquet files
* [PARQUET-435](https://issues.apache.org/jira/browse/PARQUET-435) - Provide vectorized ColumnReader interface
* [PARQUET-436](https://issues.apache.org/jira/browse/PARQUET-436) - Implement ParquetFileWriter class entry point for generating new Parquet files
* [PARQUET-437](https://issues.apache.org/jira/browse/PARQUET-437) - Incorporate googletest thirdparty dependency and add cmake tools (ADD\_PARQUET\_TEST) to simplify adding new unit tests
* [PARQUET-438](https://issues.apache.org/jira/browse/PARQUET-438) - Update RLE encoder/decoder modules from Impala upstream changes and adapt unit tests
* [PARQUET-439](https://issues.apache.org/jira/browse/PARQUET-439) - Conform all copyright headers to ASF requirements
* [PARQUET-442](https://issues.apache.org/jira/browse/PARQUET-442) - Convert flat SchemaElement vector to implied nested schema data structure
* [PARQUET-448](https://issues.apache.org/jira/browse/PARQUET-448) - Add cmake option to skip building the unit tests
* [PARQUET-449](https://issues.apache.org/jira/browse/PARQUET-449) - Update to latest parquet.thrift
* [PARQUET-451](https://issues.apache.org/jira/browse/PARQUET-451) - Add a RowGroup reader interface class
* [PARQUET-456](https://issues.apache.org/jira/browse/PARQUET-456) - Add zlib codec support
* [PARQUET-463](https://issues.apache.org/jira/browse/PARQUET-463) - Add DCHECK\* macros for assertions in debug builds
* [PARQUET-468](https://issues.apache.org/jira/browse/PARQUET-468) - Add a cmake option to generate the Parquet thrift headers with the thriftc in the environment
* [PARQUET-477](https://issues.apache.org/jira/browse/PARQUET-477) - Enable clang-format check during the Travis CI build
* [PARQUET-482](https://issues.apache.org/jira/browse/PARQUET-482) - Organize src code file structure to have a very clear folder with public headers.
* [PARQUET-485](https://issues.apache.org/jira/browse/PARQUET-485) - Decouple data page delimiting from column reader / scanner classes, create test fixtures
* [PARQUET-488](https://issues.apache.org/jira/browse/PARQUET-488) - Add SSE-related cmake options to manage compiler flags
* [PARQUET-489](https://issues.apache.org/jira/browse/PARQUET-489) - Add visibility macros to be used for public and internal APIs of libparquet
* [PARQUET-494](https://issues.apache.org/jira/browse/PARQUET-494) - Implement PLAIN\_DICTIONARY encoding and decoding
* [PARQUET-496](https://issues.apache.org/jira/browse/PARQUET-496) - Fix cpplint configuration to be more restrictive
* [PARQUET-497](https://issues.apache.org/jira/browse/PARQUET-497) - Decouple Parquet physical file structure from FileReader class
* [PARQUET-499](https://issues.apache.org/jira/browse/PARQUET-499) - Complete PlainEncoder implementation for all primitive types and test end to end
* [PARQUET-501](https://issues.apache.org/jira/browse/PARQUET-501) - Add an OutputStream abstraction (capable of memory allocation) for Encoder public API
* [PARQUET-503](https://issues.apache.org/jira/browse/PARQUET-503) - Re-enable parquet 2.0 encodings
* [PARQUET-508](https://issues.apache.org/jira/browse/PARQUET-508) - Add ParquetFilePrinter
* [PARQUET-508](https://issues.apache.org/jira/browse/PARQUET-508) - Add ParquetFilePrinter
* [PARQUET-512](https://issues.apache.org/jira/browse/PARQUET-512) - Add optional google/benchmark 3rd-party dependency for performance testing
* [PARQUET-515](https://issues.apache.org/jira/browse/PARQUET-515) - Add "Reset" to LevelEncoder and LevelDecoder
* [PARQUET-518](https://issues.apache.org/jira/browse/PARQUET-518) - Review usages of size\_t and unsigned integers generally per Google style guide
* [PARQUET-519](https://issues.apache.org/jira/browse/PARQUET-519) - Disable compiler warning supressions and fix all DEBUG build warnings
* [PARQUET-520](https://issues.apache.org/jira/browse/PARQUET-520) - Add version of LocalFileSource that uses memory-mapping for zero-copy reads
* [PARQUET-533](https://issues.apache.org/jira/browse/PARQUET-533) - Simplify RandomAccessSource API to combine Seek/Read
* [PARQUET-538](https://issues.apache.org/jira/browse/PARQUET-538) - Improve ColumnReader Tests
* [PARQUET-542](https://issues.apache.org/jira/browse/PARQUET-542) - Support memory allocation from external memory
* [PARQUET-545](https://issues.apache.org/jira/browse/PARQUET-545) - Improve API to support Decimal type
* [PARQUET-547](https://issues.apache.org/jira/browse/PARQUET-547) - Refactor most templates to use DataType structs rather than the Type::type enum
* [PARQUET-551](https://issues.apache.org/jira/browse/PARQUET-551) - Handle compiler warnings due to disabled DCHECKs in release builds
* [PARQUET-556](https://issues.apache.org/jira/browse/PARQUET-556) - Extend RowGroupStatistics to include "min" "max" statistics
* [PARQUET-559](https://issues.apache.org/jira/browse/PARQUET-559) - Enable InputStream as a source to the ParquetFileReader
* [PARQUET-564](https://issues.apache.org/jira/browse/PARQUET-564) - Add option to run unit tests with valgrind --tool=memcheck
* [PARQUET-566](https://issues.apache.org/jira/browse/PARQUET-566) - Add method to retrieve the full column path
* [PARQUET-568](https://issues.apache.org/jira/browse/PARQUET-568) - Read only specified top-level columns in DebugPrint
* [PARQUET-572](https://issues.apache.org/jira/browse/PARQUET-572) - Rename parquet\_cpp namespace to parquet
* [PARQUET-573](https://issues.apache.org/jira/browse/PARQUET-573) - C++: Create a public API for reading and writing file metadata
* [PARQUET-582](https://issues.apache.org/jira/browse/PARQUET-582) - Conversion functions for Parquet enums to Thrift enums
* [PARQUET-583](https://issues.apache.org/jira/browse/PARQUET-583) - Implement Parquet to Thrift schema conversion
* [PARQUET-587](https://issues.apache.org/jira/browse/PARQUET-587) - Implement BufferReader::Read(int64\_t,uint8\_t\*)
* [PARQUET-589](https://issues.apache.org/jira/browse/PARQUET-589) - Implement Chunked InMemoryInputStream for better memory usage
* [PARQUET-592](https://issues.apache.org/jira/browse/PARQUET-592) - Support compressed writes
* [PARQUET-593](https://issues.apache.org/jira/browse/PARQUET-593) - Add API for writing Page statistics
* [PARQUET-595](https://issues.apache.org/jira/browse/PARQUET-595) - Add API for key-value metadata
* [PARQUET-595](https://issues.apache.org/jira/browse/PARQUET-595) - Add API for key-value metadata
* [PARQUET-597](https://issues.apache.org/jira/browse/PARQUET-597) - Add data rates to benchmark output
* [PARQUET-598](https://issues.apache.org/jira/browse/PARQUET-598) - [C++] Test writing all primitive data types
* [PARQUET-600](https://issues.apache.org/jira/browse/PARQUET-600) - Add benchmarks for RLE-Level encoding
* [PARQUET-603](https://issues.apache.org/jira/browse/PARQUET-603) - Implement missing information in schema descriptor
* [PARQUET-605](https://issues.apache.org/jira/browse/PARQUET-605) - Expose schema node in ColumnDescriptor
* [PARQUET-607](https://issues.apache.org/jira/browse/PARQUET-607) - Public Writer header
* [PARQUET-610](https://issues.apache.org/jira/browse/PARQUET-610) - Print ColumnMetaData for each RowGroup
* [PARQUET-616](https://issues.apache.org/jira/browse/PARQUET-616) - C++: WriteBatch should accept const arrays
* [PARQUET-619](https://issues.apache.org/jira/browse/PARQUET-619) - C++: Add OutputStream for local files
* [PARQUET-625](https://issues.apache.org/jira/browse/PARQUET-625) - Improve RLE read performance
* [PARQUET-633](https://issues.apache.org/jira/browse/PARQUET-633) - Add version to WriterProperties
* [PARQUET-634](https://issues.apache.org/jira/browse/PARQUET-634) - Consistent private linking of dependencies
* [PARQUET-636](https://issues.apache.org/jira/browse/PARQUET-636) - Expose selection for different encodings
* [PARQUET-641](https://issues.apache.org/jira/browse/PARQUET-641) - Instantiate stringstream only if needed in SerializedPageReader::NextPage
* [PARQUET-646](https://issues.apache.org/jira/browse/PARQUET-646) - [C++] Enable easier 3rd-party toolchain clang builds on Linux
* [PARQUET-666](https://issues.apache.org/jira/browse/PARQUET-666) - PLAIN\_DICTIONARY write support
* [PARQUET-671](https://issues.apache.org/jira/browse/PARQUET-671) - Improve performance of RLE/bit-packed decoding in parquet-cpp
* [PARQUET-679](https://issues.apache.org/jira/browse/PARQUET-679) - [C++] Build and unit tests support for MSVC on Windows
* [PARQUET-679](https://issues.apache.org/jira/browse/PARQUET-679) - [C++] Build and unit tests support for MSVC on Windows
* [PARQUET-679](https://issues.apache.org/jira/browse/PARQUET-679) - [C++] Build and unit tests support for MSVC on Windows
* [PARQUET-679](https://issues.apache.org/jira/browse/PARQUET-679) - [C++] Build and unit tests support for MSVC on Windows
* [PARQUET-681](https://issues.apache.org/jira/browse/PARQUET-681) - Add tool to scan a parquet file
* [PARQUET-681](https://issues.apache.org/jira/browse/PARQUET-681) - Add tool to scan a parquet file
* [PARQUET-687](https://issues.apache.org/jira/browse/PARQUET-687) - C++: Switch to PLAIN encoding if dictionary grows too large
* [PARQUET-689](https://issues.apache.org/jira/browse/PARQUET-689) - C++: Compress DataPages eagerly
* [PARQUET-699](https://issues.apache.org/jira/browse/PARQUET-699) - Update parquet.thrift from https://github.com/apache/parquet-format
* [PARQUET-712](https://issues.apache.org/jira/browse/PARQUET-712) - C++: Read into Arrow memory
* [PARQUET-721](https://issues.apache.org/jira/browse/PARQUET-721) - Performance benchmarks for reading into Arrow structures
* [PARQUET-724](https://issues.apache.org/jira/browse/PARQUET-724) - Test more advanced properties setting
* [PARQUET-728](https://issues.apache.org/jira/browse/PARQUET-728) - [C++] Bring parquet::arrow up to date with API changes in arrow::io
* [PARQUET-728](https://issues.apache.org/jira/browse/PARQUET-728) - [C++] Bring parquet::arrow up to date with API changes in arrow::io
* [PARQUET-731](https://issues.apache.org/jira/browse/PARQUET-731) - [CPP] Add API to return metadata size and Skip reading values
* [PARQUET-737](https://issues.apache.org/jira/browse/PARQUET-737) - Use absolute namespace in macros
* [PARQUET-752](https://issues.apache.org/jira/browse/PARQUET-752) - [C++] Conform parquet\_arrow to upstream API changes
* [PARQUET-762](https://issues.apache.org/jira/browse/PARQUET-762) - C++: Use optimistic allocation instead of Arrow Builders
* [PARQUET-763](https://issues.apache.org/jira/browse/PARQUET-763) - C++: Expose ParquetFileReader through Arrow reader
* [PARQUET-769](https://issues.apache.org/jira/browse/PARQUET-769) - C++: Add support for Brotli Compression
* [PARQUET-778](https://issues.apache.org/jira/browse/PARQUET-778) - Standardize the schema output to match the parquet-mr format
* [PARQUET-782](https://issues.apache.org/jira/browse/PARQUET-782) - C++: Support writing to Arrow sinks
* [PARQUET-785](https://issues.apache.org/jira/browse/PARQUET-785) - C++: List conversion for Arrow Schemas
* [PARQUET-805](https://issues.apache.org/jira/browse/PARQUET-805) - C++: Read Int96 into Arrow Timestamp(ns)
* [PARQUET-807](https://issues.apache.org/jira/browse/PARQUET-807) - [C++] Add API to read file metadata only from a file handle
* [PARQUET-807](https://issues.apache.org/jira/browse/PARQUET-807) - [C++] Add API to read file metadata only from a file handle
* [PARQUET-809](https://issues.apache.org/jira/browse/PARQUET-809) - [C++] Add API to determine if two files' schemas are compatible
* [PARQUET-813](https://issues.apache.org/jira/browse/PARQUET-813) - C++: Build dependencies using CMake External project
* [PARQUET-820](https://issues.apache.org/jira/browse/PARQUET-820) - C++: Decoders should directly emit arrays with spacing for null entries
* [PARQUET-829](https://issues.apache.org/jira/browse/PARQUET-829) - C++: Make use of ARROW-469
* [PARQUET-830](https://issues.apache.org/jira/browse/PARQUET-830) - [C++] Add additional configuration options to parquet::arrow::OpenFIle
* [PARQUET-833](https://issues.apache.org/jira/browse/PARQUET-833) - C++: Provide API to write spaced arrays (e.g. Arrow)
* [PARQUET-834](https://issues.apache.org/jira/browse/PARQUET-834) - C++: Support r/w of arrow::ListArray
* [PARQUET-835](https://issues.apache.org/jira/browse/PARQUET-835) - [C++] Add option to parquet::arrow to read columns in parallel using a thread pool
* [PARQUET-836](https://issues.apache.org/jira/browse/PARQUET-836) - [C++] Add column selection to parquet::arrow::FileReader
* [PARQUET-844](https://issues.apache.org/jira/browse/PARQUET-844) - [C++] Consolidate encodings, schema, and compression subdirectories into fewer files
* [PARQUET-848](https://issues.apache.org/jira/browse/PARQUET-848) - [C++] Consolidate libparquet\_thrift subcomponent
* [PARQUET-857](https://issues.apache.org/jira/browse/PARQUET-857) - [C++] Flatten parquet/encodings directory
* [PARQUET-858](https://issues.apache.org/jira/browse/PARQUET-858) - [C++] Flatten parquet/column directory, consolidate related code
* [PARQUET-859](https://issues.apache.org/jira/browse/PARQUET-859) - [C++] Flatten parquet/file directory
* [PARQUET-862](https://issues.apache.org/jira/browse/PARQUET-862) - Provide defaut cache size values if CPU info probing is not available
* [PARQUET-866](https://issues.apache.org/jira/browse/PARQUET-866) - [C++] Account for API changes in ARROW-33
* [PARQUET-867](https://issues.apache.org/jira/browse/PARQUET-867) - [C++] Support writing sliced Arrow arrays
* [PARQUET-874](https://issues.apache.org/jira/browse/PARQUET-874) - [C++] Use default memory allocator from Arrow
* [PARQUET-877](https://issues.apache.org/jira/browse/PARQUET-877) - C++: Update Arrow Hash, update Version in metadata.
* [PARQUET-882](https://issues.apache.org/jira/browse/PARQUET-882) - [CPP] Improve Application Version parsing
* [PARQUET-890](https://issues.apache.org/jira/browse/PARQUET-890) - C++: Support I/O of DATE columns in parquet\_arrow
* [PARQUET-894](https://issues.apache.org/jira/browse/PARQUET-894) - Fix compilation warning
* [PARQUET-894](https://issues.apache.org/jira/browse/PARQUET-894) - Fix compilation warning
* [PARQUET-897](https://issues.apache.org/jira/browse/PARQUET-897) - [C++] Only use designated public headers from libarrow
* [PARQUET-903](https://issues.apache.org/jira/browse/PARQUET-903) - C++: Add option to set RPATH to ORIGIN
* [PARQUET-909](https://issues.apache.org/jira/browse/PARQUET-909) - [CPP]: Reduce buffer allocations (mallocs) on critical path
* [PARQUET-909](https://issues.apache.org/jira/browse/PARQUET-909) - [CPP]: Reduce buffer allocations (mallocs) on critical path
* [PARQUET-911](https://issues.apache.org/jira/browse/PARQUET-911) - C++: Support nested structs in parquet\_arrow
* [PARQUET-928](https://issues.apache.org/jira/browse/PARQUET-928) - [C++] Support pkg-config
* [PARQUET-929](https://issues.apache.org/jira/browse/PARQUET-929) - [C++] Handle arrow::DictionaryArray when writing Arrow data
* [PARQUET-930](https://issues.apache.org/jira/browse/PARQUET-930) - [C++] Account for all Arrow date/time types
* [PARQUET-934](https://issues.apache.org/jira/browse/PARQUET-934) - [C++] Support multiarch on Debian
* [PARQUET-935](https://issues.apache.org/jira/browse/PARQUET-935) - [C++] Set shared library version for .deb packages
* [PARQUET-946](https://issues.apache.org/jira/browse/PARQUET-946) - [C++] Refactoring in parquet::arrow::FileReader to be able to read a single row group
* [PARQUET-953](https://issues.apache.org/jira/browse/PARQUET-953) - [C++] Change arrow::FileWriter API to be initialized from a Schema, and provide for writing multiple tables
* [PARQUET-967](https://issues.apache.org/jira/browse/PARQUET-967) - [C++] Combine libparquet/libparquet\_arrow libraries
* [PARQUET-970](https://issues.apache.org/jira/browse/PARQUET-970) - Add Add Lz4 and Zstd compression codecs
* [PARQUET-978](https://issues.apache.org/jira/browse/PARQUET-978) - [C++] Minimizing footer reads for small(ish) metadata
* [PARQUET-984](https://issues.apache.org/jira/browse/PARQUET-984) - C++: Add abi and so version to pkg-config
* [PARQUET-991](https://issues.apache.org/jira/browse/PARQUET-991) - [C++] Fix compiler warnings on MSVC and build with /WX in Appveyor
* [PARQUET-991](https://issues.apache.org/jira/browse/PARQUET-991) - [C++] Fix compiler warnings on MSVC and build with /WX in Appveyor
* [PARQUET-991](https://issues.apache.org/jira/browse/PARQUET-991) - [C++] Fix compiler warnings on MSVC and build with /WX in Appveyor
* [PARQUET-999](https://issues.apache.org/jira/browse/PARQUET-999) - Improve MSVC build - Enable PARQUET\_BUILD\_BENCHMARKS
* [PARQUET-1008](https://issues.apache.org/jira/browse/PARQUET-1008) - Update TypedColumnReader::ReadBatch method to accept batch\_size as int64\_t
* [PARQUET-1035](https://issues.apache.org/jira/browse/PARQUET-1035) - Write Int96 from Arrow Timestamp(ns)
* [PARQUET-1037](https://issues.apache.org/jira/browse/PARQUET-1037) - Allow final RowGroup to be unfilled
* [PARQUET-1041](https://issues.apache.org/jira/browse/PARQUET-1041) - C++: Support Arrow's NullArray
* [PARQUET-1043](https://issues.apache.org/jira/browse/PARQUET-1043) - [C++] Raise minimum supported CMake version to 3.2
* [PARQUET-1044](https://issues.apache.org/jira/browse/PARQUET-1044) - [C++] Use compression libraries from Apache Arrow
* [PARQUET-1045](https://issues.apache.org/jira/browse/PARQUET-1045) - [C++] Refactor to account for computational utility code migration in ARROW-1154
* [PARQUET-1053](https://issues.apache.org/jira/browse/PARQUET-1053) - Fix unused result warnings due to unchecked Statuses
* [PARQUET-1053](https://issues.apache.org/jira/browse/PARQUET-1053) - Fix unused result warnings due to unchecked Statuses
* [PARQUET-1068](https://issues.apache.org/jira/browse/PARQUET-1068) - [C++] Use more vanilla Google C++ code formatting
* [PARQUET-1068](https://issues.apache.org/jira/browse/PARQUET-1068) - [C++] Use more vanilla Google C++ code formatting
* [PARQUET-1072](https://issues.apache.org/jira/browse/PARQUET-1072) - [C++] Add ARROW\_NO\_DEPRECATED\_API to CI to check for deprecated API use
* [PARQUET-1078](https://issues.apache.org/jira/browse/PARQUET-1078) - [C++] Add Arrow writer option to coerce timestamps to milliseconds or microseconds
* [PARQUET-1079](https://issues.apache.org/jira/browse/PARQUET-1079) - [C++] Account for Arrow API change in ARROW-1335
* [PARQUET-1083](https://issues.apache.org/jira/browse/PARQUET-1083) - [C++] Refactor core logic in parquet-scan.cc so that it can be used as a library function for benchmarking
* [PARQUET-1083](https://issues.apache.org/jira/browse/PARQUET-1083) - [C++] Refactor core logic in parquet-scan.cc so that it can be used as a library function for benchmarking
* [PARQUET-1086](https://issues.apache.org/jira/browse/PARQUET-1086) - [C++] Remove usage of arrow/util/compiler-util.h after 1.3.0 release
* [PARQUET-1087](https://issues.apache.org/jira/browse/PARQUET-1087) - [C++] Add wrapper for ScanFileContents in parquet::arrow that catches exceptions
* [PARQUET-1092](https://issues.apache.org/jira/browse/PARQUET-1092) - [C++] Write Arrow tables with chunked columns
* [PARQUET-1093](https://issues.apache.org/jira/browse/PARQUET-1093) - C++: Improve Arrow level generation error message
* [PARQUET-1094](https://issues.apache.org/jira/browse/PARQUET-1094) - C++: Add benchmark for boolean Arrow column I/O
* [PARQUET-1095](https://issues.apache.org/jira/browse/PARQUET-1095) - [C++] Read and write Arrow decimal values
* [PARQUET-1104](https://issues.apache.org/jira/browse/PARQUET-1104) - [C++] Upgrade to Apache Arrow 0.7.0 RC0
* [PARQUET-1150](https://issues.apache.org/jira/browse/PARQUET-1150) - C++: Hide statically linked boost symbols
* [PARQUET-1160](https://issues.apache.org/jira/browse/PARQUET-1160) - [C++] Implement BYTE\_ARRAY-backed Decimal reads
* [PARQUET-1164](https://issues.apache.org/jira/browse/PARQUET-1164) - [C++] Follow API changes in ARROW-1808
* [PARQUET-1165](https://issues.apache.org/jira/browse/PARQUET-1165) - [C++] Pin clang-format version to 4.0
* [PARQUET-1166](https://issues.apache.org/jira/browse/PARQUET-1166) - [API Proposal] Add GetRecordBatchReader in parquet/arrow/reader.h
* [PARQUET-1177](https://issues.apache.org/jira/browse/PARQUET-1177) - [C++] Add more extensive compiler warnings when using Clang
* [PARQUET-1177](https://issues.apache.org/jira/browse/PARQUET-1177) - [C++] Add more extensive compiler warnings when using Clang
* [PARQUET-1196](https://issues.apache.org/jira/browse/PARQUET-1196) - [C++] Provide a parquet\_arrow example project incl. CMake setup
* [PARQUET-1200](https://issues.apache.org/jira/browse/PARQUET-1200) - [C++] Support reading a single Arrow column from a Parquet file
* [PARQUET-1218](https://issues.apache.org/jira/browse/PARQUET-1218) - [C++] More informative error message on too short pages
* [PARQUET-1225](https://issues.apache.org/jira/browse/PARQUET-1225) - NaN values may lead to incorrect filtering under certain circumstances
* [PARQUET-1227](https://issues.apache.org/jira/browse/PARQUET-1227) - Thrift crypto metadata structures
* [PARQUET-1256](https://issues.apache.org/jira/browse/PARQUET-1256) - [C++] Add --print-key-value-metadata option to parquet\_reader tool
* [PARQUET-1256](https://issues.apache.org/jira/browse/PARQUET-1256) - [C++] Add --print-key-value-metadata option to parquet\_reader tool
* [PARQUET-1267](https://issues.apache.org/jira/browse/PARQUET-1267) - replace "unsafe" std::equal by std::memcmp
* [PARQUET-1276](https://issues.apache.org/jira/browse/PARQUET-1276) - [C++] Reduce the amount of memory used for writing null decimal values
* [PARQUET-1279](https://issues.apache.org/jira/browse/PARQUET-1279) - Use ASSERT\_NO\_FATAIL\_FAILURE in C++ unit tests
* [PARQUET-1301](https://issues.apache.org/jira/browse/PARQUET-1301) - [C++] Crypto package in parquet-cpp
* [PARQUET-1308](https://issues.apache.org/jira/browse/PARQUET-1308) - [C++] parquet::arrow should use thread pool, not ParallelFor
* [PARQUET-1323](https://issues.apache.org/jira/browse/PARQUET-1323) - [C++] Fix compiler warnings with clang-6.0
* [PARQUET-1332](https://issues.apache.org/jira/browse/PARQUET-1332) - [C++] Add bloom filter utility class
* [PARQUET-1340](https://issues.apache.org/jira/browse/PARQUET-1340) - [C++] Fix Travis Ci valgrind errors related to std::random\_device
* [PARQUET-1346](https://issues.apache.org/jira/browse/PARQUET-1346) - [C++] Protect against null values data in empty Arrow array
* [PARQUET-1348](https://issues.apache.org/jira/browse/PARQUET-1348) - [C++] Allow Arrow FileWriter To Write FileMetaData
* [PARQUET-1350](https://issues.apache.org/jira/browse/PARQUET-1350) - [C++] Use abstract ResizableBuffer instead of concrete PoolBuffer
* [PARQUET-1360](https://issues.apache.org/jira/browse/PARQUET-1360) - [C++] Minor API + style changes follow up to PARQUET-1348
* [PARQUET-1366](https://issues.apache.org/jira/browse/PARQUET-1366) - [C++] Streamline use of Arrow bit-util.h
* [PARQUET-1372](https://issues.apache.org/jira/browse/PARQUET-1372) - [C++] Add an API to allow writing RowGroups based on their size rather than num\_rows
* [PARQUET-1372](https://issues.apache.org/jira/browse/PARQUET-1372) - [C++] Add an API to allow writing RowGroups based on their size rather than num\_rows
* [PARQUET-1378](https://issues.apache.org/jira/browse/PARQUET-1378) - [c++] Allow RowGroups with zero rows to be written
* [PARQUET-1382](https://issues.apache.org/jira/browse/PARQUET-1382) - [C++] Prepare for arrow::test namespace removal
* [PARQUET-1392](https://issues.apache.org/jira/browse/PARQUET-1392) - [C++] Supply row group indices to parquet::arrow::FileReader::ReadTable
* [PARQUET-1398](https://issues.apache.org/jira/browse/PARQUET-1398) - Separate iv\_prefix for GCM and CTR modes
* [PARQUET-1401](https://issues.apache.org/jira/browse/PARQUET-1401) - RowGroup offset and total compressed size fields
* [PARQUET-1427](https://issues.apache.org/jira/browse/PARQUET-1427) - [C++] Move example executables and CLI tools to Apache Arrow repo
* [PARQUET-1431](https://issues.apache.org/jira/browse/PARQUET-1431) - [C++] Automaticaly set thrift to use boost for thrift versions before 0.11


## Bug Fixes

* [ARROW-1380](https://issues.apache.org/jira/browse/ARROW-1380) - [C++] Fix "still reachable" valgrind warnings when PLASMA\_VALGRIND=1
* [ARROW-1661](https://issues.apache.org/jira/browse/ARROW-1661) - [Python] Python 3.7 support
* [ARROW-1799](https://issues.apache.org/jira/browse/ARROW-1799) - [Plasma C++] Make unittest does not create plasma store executable
* [ARROW-1996](https://issues.apache.org/jira/browse/ARROW-1996) - [Python] pyarrow.read\_serialized cannot read concatenated records
* [ARROW-2027](https://issues.apache.org/jira/browse/ARROW-2027) - [C++] ipc::Message::SerializeTo does not pad the message body
* [ARROW-2220](https://issues.apache.org/jira/browse/ARROW-2220) - Change default fix version in merge tool to be the next mainline release version
* [ARROW-2310](https://issues.apache.org/jira/browse/ARROW-2310) - Source release scripts fail with Java8
* [ARROW-2646](https://issues.apache.org/jira/browse/ARROW-2646) - [C++/Python] Pandas roundtrip for date objects
* [ARROW-2775](https://issues.apache.org/jira/browse/ARROW-2775) - [Python] ccache error when building manylinux1 wheels
* [ARROW-2776](https://issues.apache.org/jira/browse/ARROW-2776) - [C++] Do not pass -Wno-noexcept-type for compilers that do not support it
* [ARROW-2782](https://issues.apache.org/jira/browse/ARROW-2782) - [Python] Ongoing Travis CI failures in Plasma unit tests
* [ARROW-2785](https://issues.apache.org/jira/browse/ARROW-2785) - [C++] Crash in json-integration-test
* [ARROW-2814](https://issues.apache.org/jira/browse/ARROW-2814) - [Python] Unify PyObject\* sequence conversion paths for built-in sequences, NumPy arrays
* [ARROW-2854](https://issues.apache.org/jira/browse/ARROW-2854) - [C++/Python] Casting float NaN to int should raise an error on safe cast
* [ARROW-2925](https://issues.apache.org/jira/browse/ARROW-2925) - [JS] Documentation failing in docker container
* [ARROW-2965](https://issues.apache.org/jira/browse/ARROW-2965) - [Python] Possible uint64 overflow issues in python\_to\_arrow.cc
* [ARROW-2966](https://issues.apache.org/jira/browse/ARROW-2966) - [Python] Data type conversion error
* [ARROW-2973](https://issues.apache.org/jira/browse/ARROW-2973) - [Python] pitrou/asv.git@customize\_commands does not work with the "new" way of activating conda
* [ARROW-2974](https://issues.apache.org/jira/browse/ARROW-2974) - [Python] Replace usages of "source activate" with "conda activate" in CI scripts
* [ARROW-2986](https://issues.apache.org/jira/browse/ARROW-2986) - [C++] /EHsc possibly needed for Visual Studio 2015 builds
* [ARROW-2992](https://issues.apache.org/jira/browse/ARROW-2992) - [Python] Parquet benchmark failure
* [ARROW-2992](https://issues.apache.org/jira/browse/ARROW-2992) - [Python] Parquet benchmark failure
* [ARROW-3006](https://issues.apache.org/jira/browse/ARROW-3006) - [GLib] .gir/.typelib for GPU aren't installed
* [ARROW-3007](https://issues.apache.org/jira/browse/ARROW-3007) - [Packaging] libarrow-gpu10 deb for Ubuntu 18.04 has broken dependencies
* [ARROW-3011](https://issues.apache.org/jira/browse/ARROW-3011) - [CI] Remove Slack notification
* [ARROW-3012](https://issues.apache.org/jira/browse/ARROW-3012) - [Python] Installation crashes with setuptools\_scm error
* [ARROW-3013](https://issues.apache.org/jira/browse/ARROW-3013) - [Website] Fix download links on website for tarballs, checksums
* [ARROW-3015](https://issues.apache.org/jira/browse/ARROW-3015) - [Python] Fix documentation typo for pa.uint8
* [ARROW-3047](https://issues.apache.org/jira/browse/ARROW-3047) - [C++] cmake downloads and builds ORC even though it's installed
* [ARROW-3049](https://issues.apache.org/jira/browse/ARROW-3049) - [C++/Python] ORC reader fails on empty file
* [ARROW-3053](https://issues.apache.org/jira/browse/ARROW-3053) - [Python] Pandas decimal conversion segfault
* [ARROW-3056](https://issues.apache.org/jira/browse/ARROW-3056) - [Python] Indicate in NativeFile docstrings methods that are part of the RawIOBase API but not implemented
* [ARROW-3061](https://issues.apache.org/jira/browse/ARROW-3061) - [Java] headroom does not take into account reservation
* [ARROW-3065](https://issues.apache.org/jira/browse/ARROW-3065) - [Python] concat\_tables() failing from bad Pandas Metadata
* [ARROW-3083](https://issues.apache.org/jira/browse/ARROW-3083) - [Python] Version in manylinux1 wheel builds is wrong
* [ARROW-3093](https://issues.apache.org/jira/browse/ARROW-3093) - [C++] Linking errors with ORC enabled
* [ARROW-3095](https://issues.apache.org/jira/browse/ARROW-3095) - [Python] test\_plasma.py fails
* [ARROW-3098](https://issues.apache.org/jira/browse/ARROW-3098) - [Python] BufferReader doesn't adhere to the seek protocol
* [ARROW-3100](https://issues.apache.org/jira/browse/ARROW-3100) - [CI] C/glib build broken on OS X
* [ARROW-3125](https://issues.apache.org/jira/browse/ARROW-3125) - [Python] Update ASV instructions
* [ARROW-3125](https://issues.apache.org/jira/browse/ARROW-3125) - [Python] Update ASV instructions
* [ARROW-3132](https://issues.apache.org/jira/browse/ARROW-3132) - Regenerate 0.10.0 changelog
* [ARROW-3137](https://issues.apache.org/jira/browse/ARROW-3137) - [Python] pyarrow 0.10 requires newer version of numpy than specified in requirements
* [ARROW-3140](https://issues.apache.org/jira/browse/ARROW-3140) - [Plasma] Plasma fails building with GPU enabled
* [ARROW-3141](https://issues.apache.org/jira/browse/ARROW-3141) - [Python] Tensorflow support in pyarrow wheels pins numpy\>=1.14
* [ARROW-3145](https://issues.apache.org/jira/browse/ARROW-3145) - [C++] Thrift compiler reruns in arrow/dbi/hiveserver2/thrift when using Ninja build
* [ARROW-3173](https://issues.apache.org/jira/browse/ARROW-3173) - [Rust] dynamic\_types example does not run
* [ARROW-3175](https://issues.apache.org/jira/browse/ARROW-3175) - [Java] Upgrade to official FlatBuffers release (Flatbuffers incompatibility)
* [ARROW-3183](https://issues.apache.org/jira/browse/ARROW-3183) - [Python] get\_library\_dirs on Windows can give the wrong directory
* [ARROW-3188](https://issues.apache.org/jira/browse/ARROW-3188) - [Python] Table.from\_arrays segfaults if lists and schema are passed
* [ARROW-3190](https://issues.apache.org/jira/browse/ARROW-3190) - [C++] "WriteableFile" is misspelled, should be renamed "WritableFile" with deprecation for old name
* [ARROW-3206](https://issues.apache.org/jira/browse/ARROW-3206) - [C++] Building with ARROW\_HIVESERVER2=ON with unit tests disabled causes error
* [ARROW-3227](https://issues.apache.org/jira/browse/ARROW-3227) - [Python] NativeFile.write shouldn't accept unicode strings
* [ARROW-3228](https://issues.apache.org/jira/browse/ARROW-3228) - [Python] Immutability of bytes is ignored
* [ARROW-3231](https://issues.apache.org/jira/browse/ARROW-3231) - [Python] Sphinx's autodoc\_default\_flags is now deprecated
* [ARROW-3237](https://issues.apache.org/jira/browse/ARROW-3237) - [CI] Update linux packaging filenames in rat exclusion list
* [ARROW-3241](https://issues.apache.org/jira/browse/ARROW-3241) - [Plasma] test\_plasma\_list test failure on Ubuntu 14.04
* [ARROW-3251](https://issues.apache.org/jira/browse/ARROW-3251) - [C++] Conversion warnings in cast.cc
* [ARROW-3256](https://issues.apache.org/jira/browse/ARROW-3256) - [JS] File footer and message metadata is inconsistent
* [ARROW-3271](https://issues.apache.org/jira/browse/ARROW-3271) - [Python] Manylinux1 builds timing out in Travis CI
* [ARROW-3279](https://issues.apache.org/jira/browse/ARROW-3279) - [C++] Allow linking Arrow tests dynamically on Windows
* [ARROW-3299](https://issues.apache.org/jira/browse/ARROW-3299) - [C++] Appveyor builds failing
* [ARROW-3322](https://issues.apache.org/jira/browse/ARROW-3322) - [CI] Rust job always runs on AppVeyor
* [ARROW-3327](https://issues.apache.org/jira/browse/ARROW-3327) - [Python] manylinux container confusing
* [ARROW-3338](https://issues.apache.org/jira/browse/ARROW-3338) - [Python] Crash when schema and columns do not match
* [ARROW-3342](https://issues.apache.org/jira/browse/ARROW-3342) - Appveyor builds have stopped triggering on GitHub
* [ARROW-3348](https://issues.apache.org/jira/browse/ARROW-3348) - Plasma store dies when an object that a dead client is waiting for gets created.
* [ARROW-3354](https://issues.apache.org/jira/browse/ARROW-3354) - [Python] read\_record\_batch interfaces differ in pyarrow and pyarrow.cuda
* [ARROW-3369](https://issues.apache.org/jira/browse/ARROW-3369) - [Packaging] Wheel builds are failing due to wheel 0.32 release
* [ARROW-3370](https://issues.apache.org/jira/browse/ARROW-3370) - [Packaging] Centos 6 build is failing
* [ARROW-3373](https://issues.apache.org/jira/browse/ARROW-3373) - Fix bug in which plasma store can die when client gets multiple objects and object becomes available.
* [ARROW-3374](https://issues.apache.org/jira/browse/ARROW-3374) - [Python] Dictionary has out-of-bound index when creating DictionaryArray from Pandas with NaN
* [ARROW-3390](https://issues.apache.org/jira/browse/ARROW-3390) - [C++] cmake file under windows msys2 system doesn't work
* [ARROW-3393](https://issues.apache.org/jira/browse/ARROW-3393) - [C++] Fix compiler warning in util/task-group-cc on clang 6
* [ARROW-3394](https://issues.apache.org/jira/browse/ARROW-3394) - [Java] Remove duplicate dependency entry in Flight
* [ARROW-3403](https://issues.apache.org/jira/browse/ARROW-3403) - [Website] Source tarball link missing from install page
* [ARROW-3420](https://issues.apache.org/jira/browse/ARROW-3420) - [C++] Fix outstanding include-what-you-use issues in src/arrow, src/parquet codebases
* [PARQUET-232](https://issues.apache.org/jira/browse/PARQUET-232) - minor compilation issue
* [PARQUET-446](https://issues.apache.org/jira/browse/PARQUET-446) - Hide thrift dependency in parquet-cpp
* [PARQUET-454](https://issues.apache.org/jira/browse/PARQUET-454) - Address inconsistencies in boolean decoding
* [PARQUET-455](https://issues.apache.org/jira/browse/PARQUET-455) - Fix compiler warnings on OS X / Clang
* [PARQUET-457](https://issues.apache.org/jira/browse/PARQUET-457) - Add compressed data page unit tests
* [PARQUET-469](https://issues.apache.org/jira/browse/PARQUET-469) - Roll back Thrift bindings to 0.9.0
* [PARQUET-472](https://issues.apache.org/jira/browse/PARQUET-472) - Clean up InputStream ownership semantics in ColumnReader
* [PARQUET-505](https://issues.apache.org/jira/browse/PARQUET-505) - Column reader: automatically handle large data pages
* [PARQUET-507](https://issues.apache.org/jira/browse/PARQUET-507) - Improve runtime of rle-test.cc
* [PARQUET-513](https://issues.apache.org/jira/browse/PARQUET-513) - Valgrind errors are not failing the Travis CI build
* [PARQUET-525](https://issues.apache.org/jira/browse/PARQUET-525) - Test coverage for malformed file failure modes on the read path
* [PARQUET-537](https://issues.apache.org/jira/browse/PARQUET-537) - LocalFileSource leaks resources
* [PARQUET-549](https://issues.apache.org/jira/browse/PARQUET-549) - Add scanner and column reader tests for dictionary data pages
* [PARQUET-555](https://issues.apache.org/jira/browse/PARQUET-555) - Dictionary page metadata handling inconsistencies
* [PARQUET-561](https://issues.apache.org/jira/browse/PARQUET-561) - ParquetFileReader::Contents PIMPL missing a virtual destructor
* [PARQUET-599](https://issues.apache.org/jira/browse/PARQUET-599) - ColumnWriter::RleEncodeLevels' size estimation might be wrong
* [PARQUET-604](https://issues.apache.org/jira/browse/PARQUET-604) - Install writer.h headers
* [PARQUET-614](https://issues.apache.org/jira/browse/PARQUET-614) - C++: Remove unneeded LZ4-related code
* [PARQUET-620](https://issues.apache.org/jira/browse/PARQUET-620) - C++: Duplicate calls to ParquetFileWriter::Close cause duplicate metdata writes
* [PARQUET-621](https://issues.apache.org/jira/browse/PARQUET-621) - C++: Uninitialised DecimalMetadata is read
* [PARQUET-629](https://issues.apache.org/jira/browse/PARQUET-629) - RowGroupSerializer should only close itself once
* [PARQUET-639](https://issues.apache.org/jira/browse/PARQUET-639) - Do not export DCHECK in public headers
* [PARQUET-643](https://issues.apache.org/jira/browse/PARQUET-643) - Add const modifier to schema pointer reference in ParquetFileWriter
* [PARQUET-657](https://issues.apache.org/jira/browse/PARQUET-657) - [C++] Don't define DISALLOW\_COPY\_AND\_ASSIGN if already defined
* [PARQUET-658](https://issues.apache.org/jira/browse/PARQUET-658) - ColumnReader has no virtual destructor
* [PARQUET-659](https://issues.apache.org/jira/browse/PARQUET-659) - [C++] Instantiated template visibility is broken on clang / OS X
* [PARQUET-662](https://issues.apache.org/jira/browse/PARQUET-662) - [C++] ParquetException must be explicitly exported in dynamic libraries
* [PARQUET-676](https://issues.apache.org/jira/browse/PARQUET-676) - MAX\_VALUES\_PER\_LITERAL\_RUN causes RLE encoding failure
* [PARQUET-691](https://issues.apache.org/jira/browse/PARQUET-691) - [C++] Write ColumnChunk metadata after each column chunk in the file
* [PARQUET-694](https://issues.apache.org/jira/browse/PARQUET-694) - C++: Revert default data page size back to 1M
* [PARQUET-700](https://issues.apache.org/jira/browse/PARQUET-700) - C++: Disable dictionary encoding for boolean columns
* [PARQUET-701](https://issues.apache.org/jira/browse/PARQUET-701) - C++: Dictionary is written multiple times if close is called multiple times.
* [PARQUET-702](https://issues.apache.org/jira/browse/PARQUET-702) - Add a writer + reader example with detailed comments
* [PARQUET-702](https://issues.apache.org/jira/browse/PARQUET-702) - Add a writer + reader example with detailed comments
* [PARQUET-703](https://issues.apache.org/jira/browse/PARQUET-703) - [C++] Validate num\_values metadata for columns with nulls
* [PARQUET-704](https://issues.apache.org/jira/browse/PARQUET-704) - [C++] scan-all.h is not being installed
* [PARQUET-708](https://issues.apache.org/jira/browse/PARQUET-708) - [C++] RleEncoder does not account for "worst case scenario" in MaxBufferSize for bit\_width \> 1
* [PARQUET-710](https://issues.apache.org/jira/browse/PARQUET-710) - Remove unneeded private member variables from RowGroupReader ABI
* [PARQUET-711](https://issues.apache.org/jira/browse/PARQUET-711) - Use metadata builders in parquet writer
* [PARQUET-711](https://issues.apache.org/jira/browse/PARQUET-711) - Use metadata builders in parquet writer
* [PARQUET-718](https://issues.apache.org/jira/browse/PARQUET-718) - Reading boolean pages written by parquet-cpp fails
* [PARQUET-719](https://issues.apache.org/jira/browse/PARQUET-719) - Fix WriterBatch API to handle NULL values
* [PARQUET-720](https://issues.apache.org/jira/browse/PARQUET-720) - Parquet-cpp fails to link when included in multiple TUs
* [PARQUET-739](https://issues.apache.org/jira/browse/PARQUET-739) - Rle-decoding uses static buffer that is shared accross threads
* [PARQUET-739](https://issues.apache.org/jira/browse/PARQUET-739) - Rle-decoding uses static buffer that is shared accross threads
* [PARQUET-741](https://issues.apache.org/jira/browse/PARQUET-741) - compression\_buffer\_ is reused although it shouldn't
* [PARQUET-742](https://issues.apache.org/jira/browse/PARQUET-742) - Add missing license headers
* [PARQUET-745](https://issues.apache.org/jira/browse/PARQUET-745) - TypedRowGroupStatistics fails to PlainDecode min and max in ByteArrayType
* [PARQUET-747](https://issues.apache.org/jira/browse/PARQUET-747) - [C++] TypedRowGroupStatistics are not being exported in libparquet.so
* [PARQUET-759](https://issues.apache.org/jira/browse/PARQUET-759) - Cannot store columns consisting of empty strings
* [PARQUET-760](https://issues.apache.org/jira/browse/PARQUET-760) - On switching from dictionary to the fallback encoding, an incorrect encoding is set
* [PARQUET-764](https://issues.apache.org/jira/browse/PARQUET-764) - [CPP] Parquet Writer does not write Boolean values correctly
* [PARQUET-766](https://issues.apache.org/jira/browse/PARQUET-766) - C++: Expose ParquetFileReader through Arrow reader as const
* [PARQUET-775](https://issues.apache.org/jira/browse/PARQUET-775) - C++: TrackingAllocator is not thread-safe
* [PARQUET-779](https://issues.apache.org/jira/browse/PARQUET-779) - Export TypedRowGroupStatistics in libparquet
* [PARQUET-780](https://issues.apache.org/jira/browse/PARQUET-780) - WriterBatch API does not properly handle NULL values for byte array types
* [PARQUET-789](https://issues.apache.org/jira/browse/PARQUET-789) - [C++] Catch and translate ParquetException in parquet::arrow::FileReader::{ReadFlatColumn, ReadFlatTable}}
* [PARQUET-793](https://issues.apache.org/jira/browse/PARQUET-793) - [CPP] Do not return incorrect statistics
* [PARQUET-797](https://issues.apache.org/jira/browse/PARQUET-797) - [C++] Update for API changes in ARROW-418
* [PARQUET-799](https://issues.apache.org/jira/browse/PARQUET-799) - concurrent usage of the file reader API
* [PARQUET-812](https://issues.apache.org/jira/browse/PARQUET-812) - [C++] Failure reading BYTE\_ARRAY data from file in parquet-compatibility project
* [PARQUET-816](https://issues.apache.org/jira/browse/PARQUET-816) - [C++] Failure decoding sample dict-encoded file from parquet-compatibility project
* [PARQUET-818](https://issues.apache.org/jira/browse/PARQUET-818) - [C++] Refactor library to share IO, Buffer, and memory management abstractions with Apache Arrow
* [PARQUET-818](https://issues.apache.org/jira/browse/PARQUET-818) - [C++] Refactor library to share IO, Buffer, and memory management abstractions with Apache Arrow
* [PARQUET-819](https://issues.apache.org/jira/browse/PARQUET-819) - C++: Trying to install non-existing parquet/arrow/utils.h
* [PARQUET-827](https://issues.apache.org/jira/browse/PARQUET-827) - [C++] Incorporate addition of arrow::MemoryPool::Reallocate
* [PARQUET-828](https://issues.apache.org/jira/browse/PARQUET-828) - [C++] "version" field set improperly in file metadata
* [PARQUET-837](https://issues.apache.org/jira/browse/PARQUET-837) - [C++] SerializedFile::ParseMetaData uses Seek, followed by Read, and could have race conditions
* [PARQUET-841](https://issues.apache.org/jira/browse/PARQUET-841) - [C++] Writing wrong format version when using ParquetVersion::PARQUET\_1\_0
* [PARQUET-842](https://issues.apache.org/jira/browse/PARQUET-842) - [C++] Impala rejects DOUBLE columns if decimal metadata is set
* [PARQUET-843](https://issues.apache.org/jira/browse/PARQUET-843) - [C++] Impala unable to read files created by parquet-cpp
* [PARQUET-846](https://issues.apache.org/jira/browse/PARQUET-846) - [CPP] CpuInfo::Init() is not thread safe
* [PARQUET-880](https://issues.apache.org/jira/browse/PARQUET-880) - [CPP] Prevent destructors from throwing
* [PARQUET-888](https://issues.apache.org/jira/browse/PARQUET-888) - C++ Memory leak in RowGroupSerializer
* [PARQUET-889](https://issues.apache.org/jira/browse/PARQUET-889) - Fix compilation when PARQUET\_USE\_SSE is on
* [PARQUET-892](https://issues.apache.org/jira/browse/PARQUET-892) - [C++] Clean up link library targets in CMake files
* [PARQUET-895](https://issues.apache.org/jira/browse/PARQUET-895) - Reading of nested columns is broken
* [PARQUET-898](https://issues.apache.org/jira/browse/PARQUET-898) - [C++] Change Travis CI OS X image to Xcode 6.4 and fix our thirdparty build
* [PARQUET-908](https://issues.apache.org/jira/browse/PARQUET-908) - Fix for PARQUET-890 introduces undefined symbol in libparquet\_arrow.so
* [PARQUET-914](https://issues.apache.org/jira/browse/PARQUET-914) - [C++] Throw more informative exception when user writes too many values to a column in a row group
* [PARQUET-915](https://issues.apache.org/jira/browse/PARQUET-915) - Support Arrow Time Types in Schema
* [PARQUET-918](https://issues.apache.org/jira/browse/PARQUET-918) - FromParquetSchema API crashes on nested schemas
* [PARQUET-918](https://issues.apache.org/jira/browse/PARQUET-918) - FromParquetSchema API crashes on nested schemas
* [PARQUET-919](https://issues.apache.org/jira/browse/PARQUET-919) - [C++] Account for API changes in ARROW-683
* [PARQUET-923](https://issues.apache.org/jira/browse/PARQUET-923) - [C++] Account for Time metadata changes in ARROW-686
* [PARQUET-933](https://issues.apache.org/jira/browse/PARQUET-933) - [C++] Account for Arrow Table API changes coming in ARROW-728
* [PARQUET-936](https://issues.apache.org/jira/browse/PARQUET-936) - [C++] parquet::arrow::WriteTable can enter infinite loop if chunk\_size is 0
* [PARQUET-943](https://issues.apache.org/jira/browse/PARQUET-943) - [C++] Overflow build error on x86
* [PARQUET-947](https://issues.apache.org/jira/browse/PARQUET-947) - [C++] Refactor to account for ARROW-795 Arrow core library consolidation
* [PARQUET-958](https://issues.apache.org/jira/browse/PARQUET-958) - [C++] Print Parquet metadata in JSON format
* [PARQUET-958](https://issues.apache.org/jira/browse/PARQUET-958) - [C++] Print Parquet metadata in JSON format
* [PARQUET-963](https://issues.apache.org/jira/browse/PARQUET-963) - [C++] Disallow reading struct types in Arrow reader for now
* [PARQUET-965](https://issues.apache.org/jira/browse/PARQUET-965) - [C++] FIXED\_LEN\_BYTE\_ARRAY types are unhandled in the Arrow reader
* [PARQUET-979](https://issues.apache.org/jira/browse/PARQUET-979) - [C++] Limit size of min, max or disable stats for long binary types
* [PARQUET-992](https://issues.apache.org/jira/browse/PARQUET-992) - [C++] parquet/compression.h leaks zlib.h
* [PARQUET-995](https://issues.apache.org/jira/browse/PARQUET-995) - [C++] Int96 reader in parquet\_arrow uses size of Int96Type instead of Int96
* [PARQUET-997](https://issues.apache.org/jira/browse/PARQUET-997) - Fix override compiler warnings
* [PARQUET-1002](https://issues.apache.org/jira/browse/PARQUET-1002) - [C++] Compute statistics based on Logical Types
* [PARQUET-1003](https://issues.apache.org/jira/browse/PARQUET-1003) - [C++] Modify DEFAULT\_CREATED\_BY value for every new release version
* [PARQUET-1007](https://issues.apache.org/jira/browse/PARQUET-1007) - [C++ ] Update parquet.thrift from https://github.com/apache/parquet-format
* [PARQUET-1029](https://issues.apache.org/jira/browse/PARQUET-1029) - [C++] TypedColumnReader/TypeColumnWriter symbols are no longer being exported
* [PARQUET-1029](https://issues.apache.org/jira/browse/PARQUET-1029) - [C++] TypedColumnReader/TypeColumnWriter symbols are no longer being exported
* [PARQUET-1033](https://issues.apache.org/jira/browse/PARQUET-1033) - Mismatched Read and Write
* [PARQUET-1038](https://issues.apache.org/jira/browse/PARQUET-1038) - Key value metadata should be nullptr if not set
* [PARQUET-1040](https://issues.apache.org/jira/browse/PARQUET-1040) - Missing writer method implementations
* [PARQUET-1042](https://issues.apache.org/jira/browse/PARQUET-1042) - C++: Compilation breaks on GCC 4.8
* [PARQUET-1048](https://issues.apache.org/jira/browse/PARQUET-1048) - [C++] Static linking of libarrow is no longer supported
* [PARQUET-1048](https://issues.apache.org/jira/browse/PARQUET-1048) - [C++] Static linking of libarrow is no longer supported
* [PARQUET-1054](https://issues.apache.org/jira/browse/PARQUET-1054) - [C++] Account for Arrow API changes in ARROW-1199
* [PARQUET-1071](https://issues.apache.org/jira/browse/PARQUET-1071) - [C++] parquet::arrow::FileWriter::Close is not idempotent
* [PARQUET-1085](https://issues.apache.org/jira/browse/PARQUET-1085) - [C++] Backwards compatibility from macro cleanup in transitive dependencies in ARROW-1452
* [PARQUET-1088](https://issues.apache.org/jira/browse/PARQUET-1088) - [CPP] remove parquet\_version.h from version control since it gets auto generated
* [PARQUET-1090](https://issues.apache.org/jira/browse/PARQUET-1090) - [C++] Fix int32 overflow in Arrow table writer, add max row group size property
* [PARQUET-1098](https://issues.apache.org/jira/browse/PARQUET-1098) - [C++] Install new header in parquet/util
* [PARQUET-1100](https://issues.apache.org/jira/browse/PARQUET-1100) - [C++] Reading repeated types should decode number of records rather than number of values
* [PARQUET-1108](https://issues.apache.org/jira/browse/PARQUET-1108) - [C++] Fix Int96 comparators
* [PARQUET-1114](https://issues.apache.org/jira/browse/PARQUET-1114) - Apply fix for ARROW-1601 and ARROW-1611 to parquet-cpp
* [PARQUET-1121](https://issues.apache.org/jira/browse/PARQUET-1121) - C++: DictionaryArrays of NullType cannot be written
* [PARQUET-1123](https://issues.apache.org/jira/browse/PARQUET-1123) - [C++] Update parquet-cpp to use Arrow's AssertArraysEqual
* [PARQUET-1138](https://issues.apache.org/jira/browse/PARQUET-1138) - [C++] Fix compilation with Arrow 0.7.1
* [PARQUET-1167](https://issues.apache.org/jira/browse/PARQUET-1167) - [C++] FieldToNode function should return a status when throwing an exception
* [PARQUET-1175](https://issues.apache.org/jira/browse/PARQUET-1175) - [C++] Fix usage of deprecated Arrow API
* [PARQUET-1179](https://issues.apache.org/jira/browse/PARQUET-1179) - [C++] Support Apache Thrift 0.11
* [PARQUET-1180](https://issues.apache.org/jira/browse/PARQUET-1180) - C++: Fix behaviour of num\_children element of primitive nodes
* [PARQUET-1193](https://issues.apache.org/jira/browse/PARQUET-1193) - [CPP] Implement ColumnOrder to support min\_value and max\_value
* [PARQUET-1226](https://issues.apache.org/jira/browse/PARQUET-1226) - [C++] Fix new build warnings with clang 5.0
* [PARQUET-1233](https://issues.apache.org/jira/browse/PARQUET-1233) - [CPP ]Enable option to switch between stl classes and boost classes for thrift header
* [PARQUET-1245](https://issues.apache.org/jira/browse/PARQUET-1245) - [C++] Segfault when writing Arrow table with duplicate columns
* [PARQUET-1255](https://issues.apache.org/jira/browse/PARQUET-1255) - [C++] Exceptions thrown in some tests
* [PARQUET-1265](https://issues.apache.org/jira/browse/PARQUET-1265) - Segfault on static ApplicationVersion initialization
* [PARQUET-1268](https://issues.apache.org/jira/browse/PARQUET-1268) - [C++] Conversion of Arrow null list columns fails
* [PARQUET-1270](https://issues.apache.org/jira/browse/PARQUET-1270) - [C++] Executable tools do not get installed
* [PARQUET-1272](https://issues.apache.org/jira/browse/PARQUET-1272) - [C++] ScanFileContents reports wrong row count for nested columns
* [PARQUET-1273](https://issues.apache.org/jira/browse/PARQUET-1273) - [Python] Error writing to partitioned Parquet dataset
* [PARQUET-1274](https://issues.apache.org/jira/browse/PARQUET-1274) - [Python] SegFault in pyarrow.parquet.write\_table with specific options
* [PARQUET-1283](https://issues.apache.org/jira/browse/PARQUET-1283) - [C++] FormatStatValue appends trailing space to string and int96
* [PARQUET-1307](https://issues.apache.org/jira/browse/PARQUET-1307) - [C++] memory-test fails with latest Arrow
* [PARQUET-1315](https://issues.apache.org/jira/browse/PARQUET-1315) - [C++] ColumnChunkMetaData.has\_dictionary\_page() should return bool, not int64\_t
* [PARQUET-1333](https://issues.apache.org/jira/browse/PARQUET-1333) - [C++] Reading of files with dictionary size 0 fails on Windows with bad\_alloc
* [PARQUET-1334](https://issues.apache.org/jira/browse/PARQUET-1334) - [C++] memory\_map parameter seems missleading in parquet file opener
* [PARQUET-1357](https://issues.apache.org/jira/browse/PARQUET-1357) - [C++] FormatStatValue truncates binary statistics on zero character
* [PARQUET-1358](https://issues.apache.org/jira/browse/PARQUET-1358) - [C++] index\_page\_offset should be unset as it is not supported.
* [PARQUET-1369](https://issues.apache.org/jira/browse/PARQUET-1369) - [Python] Unavailable Parquet column statistics from Spark-generated file
* [PARQUET-1384](https://issues.apache.org/jira/browse/PARQUET-1384) - [C++] Clang compiler warnings in bloom\_filter-test.cc



# Apache Arrow 0.10.0 (2018-08-06)

## Bug Fixes

* [ARROW-198](https://issues.apache.org/jira/browse/ARROW-198) - [Java] OutOfMemoryError for vector test case
* [ARROW-640](https://issues.apache.org/jira/browse/ARROW-640) - [Python] Arrow scalar values should have a sensible \_\_hash\_\_ and comparison
* [ARROW-2020](https://issues.apache.org/jira/browse/ARROW-2020) - [Python] Parquet segfaults if coercing ns timestamps and writing 96-bit timestamps
* [ARROW-2059](https://issues.apache.org/jira/browse/ARROW-2059) - [Python] Possible performance regression in Feather read/write path
* [ARROW-2101](https://issues.apache.org/jira/browse/ARROW-2101) - [Python] from\_pandas reads 'str' type as binary Arrow data with Python 2
* [ARROW-2122](https://issues.apache.org/jira/browse/ARROW-2122) - [Python] Pyarrow fails to serialize dataframe with timestamp.
* [ARROW-2182](https://issues.apache.org/jira/browse/ARROW-2182) - [Python] ASV benchmark setup does not account for C++ library changing
* [ARROW-2189](https://issues.apache.org/jira/browse/ARROW-2189) - [C++] Seg. fault on make\_shared<PoolBuffer\>
* [ARROW-2193](https://issues.apache.org/jira/browse/ARROW-2193) - [Plasma] plasma\_store has runtime dependency on Boost shared libraries when ARROW\_BOOST\_USE\_SHARED=on
* [ARROW-2195](https://issues.apache.org/jira/browse/ARROW-2195) - [Plasma] Segfault when retrieving RecordBatch from plasma store
* [ARROW-2247](https://issues.apache.org/jira/browse/ARROW-2247) - [Python] Statically-linking boost\_regex in both libarrow and libparquet results in segfault
* [ARROW-2273](https://issues.apache.org/jira/browse/ARROW-2273) - Cannot deserialize pandas SparseDataFrame
* [ARROW-2300](https://issues.apache.org/jira/browse/ARROW-2300) - [Python] python/testing/test\_hdfs.sh no longer works
* [ARROW-2305](https://issues.apache.org/jira/browse/ARROW-2305) - [Python] Cython 0.25.2 compilation failure
* [ARROW-2314](https://issues.apache.org/jira/browse/ARROW-2314) - [Python] Union array slicing is defective
* [ARROW-2326](https://issues.apache.org/jira/browse/ARROW-2326) - [Python] cannot import pip installed pyarrow on OS X (10.9)
* [ARROW-2328](https://issues.apache.org/jira/browse/ARROW-2328) - [C++] Writing a slice with feather ignores the offset
* [ARROW-2331](https://issues.apache.org/jira/browse/ARROW-2331) - [Python] Fix indexing implementations
* [ARROW-2333](https://issues.apache.org/jira/browse/ARROW-2333) - [Python] boost bundling fails in setup.py
* [ARROW-2342](https://issues.apache.org/jira/browse/ARROW-2342) - [Python] Aware timestamp type fails pickling
* [ARROW-2346](https://issues.apache.org/jira/browse/ARROW-2346) - [Python] PYARROW\_CXXFLAGS doesn't accept multiple options
* [ARROW-2349](https://issues.apache.org/jira/browse/ARROW-2349) - [Python] Boost shared library bundling is broken for MSVC
* [ARROW-2351](https://issues.apache.org/jira/browse/ARROW-2351) - [C++] StringBuilder::append(vector<string\>...) not implemented
* [ARROW-2354](https://issues.apache.org/jira/browse/ARROW-2354) - [C++] PyDecimal\_Check() is much too slow
* [ARROW-2355](https://issues.apache.org/jira/browse/ARROW-2355) - [Python] Unable to import pyarrow [0.9.0] OSX
* [ARROW-2357](https://issues.apache.org/jira/browse/ARROW-2357) - Benchmark PandasObjectIsNull
* [ARROW-2368](https://issues.apache.org/jira/browse/ARROW-2368) - DecimalVector\#setBigEndian is not padding correctly for negative values
* [ARROW-2369](https://issues.apache.org/jira/browse/ARROW-2369) - Large (\>\~20 GB) files written to Parquet via PyArrow are corrupted
* [ARROW-2370](https://issues.apache.org/jira/browse/ARROW-2370) - [GLib] include path is wrong on Meson build
* [ARROW-2371](https://issues.apache.org/jira/browse/ARROW-2371) - [GLib] gio-2.0 isn't required on GNU Autotools build
* [ARROW-2372](https://issues.apache.org/jira/browse/ARROW-2372) - [Python] ArrowIOError: Invalid argument when reading Parquet file
* [ARROW-2375](https://issues.apache.org/jira/browse/ARROW-2375) - [Rust] Buffer should release memory when dropped
* [ARROW-2377](https://issues.apache.org/jira/browse/ARROW-2377) - [GLib] Travis-CI failures
* [ARROW-2380](https://issues.apache.org/jira/browse/ARROW-2380) - [Python] Correct issues in numpy\_to\_arrow conversion routines
* [ARROW-2382](https://issues.apache.org/jira/browse/ARROW-2382) - [Rust] List<T\> was not using memory safely
* [ARROW-2383](https://issues.apache.org/jira/browse/ARROW-2383) - [C++] Debian packages need to depend on libprotobuf
* [ARROW-2387](https://issues.apache.org/jira/browse/ARROW-2387) - [Python] negative decimal values get spurious rescaling error
* [ARROW-2391](https://issues.apache.org/jira/browse/ARROW-2391) - [Python] Segmentation fault from PyArrow when mapping Pandas datetime column to pyarrow.date64
* [ARROW-2393](https://issues.apache.org/jira/browse/ARROW-2393) - [C++] arrow/status.h does not define ARROW\_CHECK needed for ARROW\_CHECK\_OK
* [ARROW-2403](https://issues.apache.org/jira/browse/ARROW-2403) - [C++] arrow::CpuInfo::model\_name\_ destructed twice on exit
* [ARROW-2405](https://issues.apache.org/jira/browse/ARROW-2405) - [C++] <functional\> is missing in plasma/client.h
* [ARROW-2418](https://issues.apache.org/jira/browse/ARROW-2418) - [Rust] List builder fails due to memory not being reserved correctly
* [ARROW-2419](https://issues.apache.org/jira/browse/ARROW-2419) - [Site] Website generation depends on local timezone
* [ARROW-2420](https://issues.apache.org/jira/browse/ARROW-2420) - [Rust] Memory is never released
* [ARROW-2421](https://issues.apache.org/jira/browse/ARROW-2421) - [C++] Update LLVM version in cpp README
* [ARROW-2423](https://issues.apache.org/jira/browse/ARROW-2423) - [Python] PyArrow datatypes raise ValueError on equality checks against non-PyArrow objects
* [ARROW-2424](https://issues.apache.org/jira/browse/ARROW-2424) - [Rust] Missing import causing broken build
* [ARROW-2425](https://issues.apache.org/jira/browse/ARROW-2425) - [Rust] Array::from missing mapping for u8 type
* [ARROW-2426](https://issues.apache.org/jira/browse/ARROW-2426) - [CI] glib build failure
* [ARROW-2432](https://issues.apache.org/jira/browse/ARROW-2432) - [Python] from\_pandas fails when converting decimals if have None values
* [ARROW-2437](https://issues.apache.org/jira/browse/ARROW-2437) - [C++] Change of arrow::ipc::ReadMessage signature breaks ABI compability
* [ARROW-2438](https://issues.apache.org/jira/browse/ARROW-2438) - [Rust] memory\_pool.rs misses license header
* [ARROW-2441](https://issues.apache.org/jira/browse/ARROW-2441) - [Rust] Builder<T\>::slice\_mut assertions are too strict
* [ARROW-2443](https://issues.apache.org/jira/browse/ARROW-2443) - [Python] Conversion from pandas of empty categorical fails with ArrowInvalid
* [ARROW-2450](https://issues.apache.org/jira/browse/ARROW-2450) - [Python] Saving to parquet fails for empty lists
* [ARROW-2452](https://issues.apache.org/jira/browse/ARROW-2452) - [TEST] Spark integration test fails with permission error
* [ARROW-2454](https://issues.apache.org/jira/browse/ARROW-2454) - [Python] Empty chunked array slice crashes
* [ARROW-2455](https://issues.apache.org/jira/browse/ARROW-2455) - [C++] The bytes\_allocated\_ in CudaContextImpl isn't initialized
* [ARROW-2457](https://issues.apache.org/jira/browse/ARROW-2457) - garrow\_array\_builder\_append\_values() won't work for large arrays
* [ARROW-2459](https://issues.apache.org/jira/browse/ARROW-2459) - pyarrow: Segfault with pyarrow.deserialize\_pandas
* [ARROW-2462](https://issues.apache.org/jira/browse/ARROW-2462) - [C++] Segfault when writing a parquet table containing a dictionary column from Record Batch Stream
* [ARROW-2465](https://issues.apache.org/jira/browse/ARROW-2465) - [Plasma] plasma\_store fails to find libarrow\_gpu.so
* [ARROW-2466](https://issues.apache.org/jira/browse/ARROW-2466) - [C++] misleading "append" flag to FileOutputStream
* [ARROW-2468](https://issues.apache.org/jira/browse/ARROW-2468) - [Rust] Builder::slice\_mut should take mut self
* [ARROW-2471](https://issues.apache.org/jira/browse/ARROW-2471) - [Rust] Assertion when pushing value to Builder/ListBuilder with zero capacity
* [ARROW-2473](https://issues.apache.org/jira/browse/ARROW-2473) - [Rust] List assertion error with list of zero length
* [ARROW-2474](https://issues.apache.org/jira/browse/ARROW-2474) - [Rust] Add windows support for memory pool abstraction
* [ARROW-2489](https://issues.apache.org/jira/browse/ARROW-2489) - [Plasma] test\_plasma.py crashes
* [ARROW-2491](https://issues.apache.org/jira/browse/ARROW-2491) - [Python] Array.from\_buffers does not work for ListArray
* [ARROW-2492](https://issues.apache.org/jira/browse/ARROW-2492) - [Python] Prevent segfault on accidental call of pyarrow.Array
* [ARROW-2500](https://issues.apache.org/jira/browse/ARROW-2500) - [Java] IPC Writers/readers are not always setting validity bits correctly
* [ARROW-2502](https://issues.apache.org/jira/browse/ARROW-2502) - [Rust] Restore Windows Compatibility
* [ARROW-2503](https://issues.apache.org/jira/browse/ARROW-2503) - [Python] Trailing space character in RowGroup statistics of pyarrow.parquet.ParquetFile
* [ARROW-2509](https://issues.apache.org/jira/browse/ARROW-2509) - [CI] Intermittent npm failures
* [ARROW-2510](https://issues.apache.org/jira/browse/ARROW-2510) - [Python] Segmentation fault when converting empty column as categorical
* [ARROW-2511](https://issues.apache.org/jira/browse/ARROW-2511) - BaseVariableWidthVector.allocateNew is not throwing OOM when it can't allocate memory
* [ARROW-2514](https://issues.apache.org/jira/browse/ARROW-2514) - [Python] Inferring / converting nested Numpy array is very slow
* [ARROW-2515](https://issues.apache.org/jira/browse/ARROW-2515) - Errors with DictionaryArray inside of ListArray or other DictionaryArray
* [ARROW-2518](https://issues.apache.org/jira/browse/ARROW-2518) - [Java] Restore Java unit tests and javadoc test to CI matrix
* [ARROW-2530](https://issues.apache.org/jira/browse/ARROW-2530) - [GLib] Out-of-source build is failed
* [ARROW-2534](https://issues.apache.org/jira/browse/ARROW-2534) - [C++] libarrow.so leaks zlib symbols
* [ARROW-2545](https://issues.apache.org/jira/browse/ARROW-2545) - [Python] Arrow fails linking against statically-compiled Python
* [ARROW-2554](https://issues.apache.org/jira/browse/ARROW-2554) - pa.array type inference bug when using NS-timestamp
* [ARROW-2557](https://issues.apache.org/jira/browse/ARROW-2557) - [Rust] Add badge for code coverage in README
* [ARROW-2561](https://issues.apache.org/jira/browse/ARROW-2561) - [C++] Crash in cuda-test shutdown with coverage enabled
* [ARROW-2564](https://issues.apache.org/jira/browse/ARROW-2564) - [C++] Rowwise Tutorial is out of date
* [ARROW-2565](https://issues.apache.org/jira/browse/ARROW-2565) - [Plasma] new subscriber cannot receive notifications about existing objects
* [ARROW-2570](https://issues.apache.org/jira/browse/ARROW-2570) - [Python] Add support for writing parquet files with LZ4 compression
* [ARROW-2571](https://issues.apache.org/jira/browse/ARROW-2571) - [C++] Lz4Codec doesn't properly handle empty data
* [ARROW-2575](https://issues.apache.org/jira/browse/ARROW-2575) - [Python] Exclude hidden files when reading Parquet dataset
* [ARROW-2578](https://issues.apache.org/jira/browse/ARROW-2578) - [Plasma] Valgrind errors related to std::random\_device
* [ARROW-2589](https://issues.apache.org/jira/browse/ARROW-2589) - [Python] test\_parquet.py regression with Pandas 0.23.0
* [ARROW-2593](https://issues.apache.org/jira/browse/ARROW-2593) - [Python] TypeError: data type "mixed-integer" not understood
* [ARROW-2594](https://issues.apache.org/jira/browse/ARROW-2594) - [Java] Vector reallocation does not properly clear reused buffers
* [ARROW-2599](https://issues.apache.org/jira/browse/ARROW-2599) - [Python] pip install is not working without Arrow C++ being installed
* [ARROW-2601](https://issues.apache.org/jira/browse/ARROW-2601) - [Python] MemoryPool bytes\_allocated causes seg
* [ARROW-2603](https://issues.apache.org/jira/browse/ARROW-2603) - [Python] from pandas raises ArrowInvalid for date(time) subclasses
* [ARROW-2615](https://issues.apache.org/jira/browse/ARROW-2615) - [Rust] Refactor introduced a bug around Arrays of String
* [ARROW-2622](https://issues.apache.org/jira/browse/ARROW-2622) - [C++] Array methods IsNull and IsValid are not complementary
* [ARROW-2629](https://issues.apache.org/jira/browse/ARROW-2629) - [Plasma] Iterator invalidation for pending\_notifications\_
* [ARROW-2630](https://issues.apache.org/jira/browse/ARROW-2630) - [Java] Typo in the document
* [ARROW-2632](https://issues.apache.org/jira/browse/ARROW-2632) - [Java] ArrowStreamWriter accumulates ArrowBlock but does not use them
* [ARROW-2640](https://issues.apache.org/jira/browse/ARROW-2640) - JS Writer should serialize schema metadata
* [ARROW-2642](https://issues.apache.org/jira/browse/ARROW-2642) - [Python] Fail building parquet binding on Windows
* [ARROW-2643](https://issues.apache.org/jira/browse/ARROW-2643) - [C++] Travis-CI build failure with cpp toolchain enabled
* [ARROW-2644](https://issues.apache.org/jira/browse/ARROW-2644) - [Python] parquet binding fails building on AppVeyor
* [ARROW-2655](https://issues.apache.org/jira/browse/ARROW-2655) - [C++] Failure with -Werror=conversion on gcc 7.3.0
* [ARROW-2657](https://issues.apache.org/jira/browse/ARROW-2657) - Segfault when importing TensorFlow after Pyarrow
* [ARROW-2668](https://issues.apache.org/jira/browse/ARROW-2668) - [C++] -Wnull-pointer-arithmetic warning with dlmalloc.c on clang 6.0, Ubuntu 14.04
* [ARROW-2669](https://issues.apache.org/jira/browse/ARROW-2669) - [C++] EP\_CXX\_FLAGS not passed on when building gbenchmark
* [ARROW-2675](https://issues.apache.org/jira/browse/ARROW-2675) - Arrow build error with clang-10 (Apple Clang / LLVM)
* [ARROW-2683](https://issues.apache.org/jira/browse/ARROW-2683) - [Python] Resource Warning (Unclosed File) when using pyarrow.parquet.read\_table()
* [ARROW-2690](https://issues.apache.org/jira/browse/ARROW-2690) - [C++] Plasma does not follow style conventions for variable and function names
* [ARROW-2691](https://issues.apache.org/jira/browse/ARROW-2691) - [Rust] Travis fails due to formatting diff
* [ARROW-2693](https://issues.apache.org/jira/browse/ARROW-2693) - [Python] pa.chunked\_array causes a segmentation fault on empty input
* [ARROW-2694](https://issues.apache.org/jira/browse/ARROW-2694) - [Python] ArrayValue string conversion returns the representation instead of the converted python object string
* [ARROW-2698](https://issues.apache.org/jira/browse/ARROW-2698) - [Python] Exception when passing a string to Table.column
* [ARROW-2711](https://issues.apache.org/jira/browse/ARROW-2711) - [Python/C++] Pandas-Arrow doesn't roundtrip when column of lists has empty first element
* [ARROW-2715](https://issues.apache.org/jira/browse/ARROW-2715) - Address apt flakiness with launchpad.net
* [ARROW-2716](https://issues.apache.org/jira/browse/ARROW-2716) - [Python] Make manylinux1 base image independent of Python patch releases
* [ARROW-2721](https://issues.apache.org/jira/browse/ARROW-2721) - [C++] Link error with Arrow C++ build with -DARROW\_ORC=ON on CentOS 7
* [ARROW-2722](https://issues.apache.org/jira/browse/ARROW-2722) - [Python] ndarray to arrow conversion fails when downcasted from pandas to\_numeric
* [ARROW-2723](https://issues.apache.org/jira/browse/ARROW-2723) - [C++] arrow-orc.pc is missing
* [ARROW-2726](https://issues.apache.org/jira/browse/ARROW-2726) - [C++] The latest Boost version is wrong
* [ARROW-2727](https://issues.apache.org/jira/browse/ARROW-2727) - [Java] Unable to build java/adapters module
* [ARROW-2741](https://issues.apache.org/jira/browse/ARROW-2741) - [Python] pa.array from np.datetime[D] and type=pa.date64 produces invalid results
* [ARROW-2744](https://issues.apache.org/jira/browse/ARROW-2744) - [Python] Writing to parquet crashes when writing a ListArray of empty lists
* [ARROW-2745](https://issues.apache.org/jira/browse/ARROW-2745) - [C++] ORC ExternalProject needs to declare dependency on vendored protobuf
* [ARROW-2747](https://issues.apache.org/jira/browse/ARROW-2747) - [CI] [Plasma] huge tables test failure on Travis
* [ARROW-2754](https://issues.apache.org/jira/browse/ARROW-2754) - [Python] When installing pyarrow via pip, a debug build is created
* [ARROW-2770](https://issues.apache.org/jira/browse/ARROW-2770) - [Packaging] Account for conda-forge compiler migration in conda recipes
* [ARROW-2773](https://issues.apache.org/jira/browse/ARROW-2773) - [Python] Corrected parquet docs partition\_cols parameter name
* [ARROW-2781](https://issues.apache.org/jira/browse/ARROW-2781) - [Python] Download boost using curl in manylinux1 image
* [ARROW-2787](https://issues.apache.org/jira/browse/ARROW-2787) - [Python] Memory Issue passing table from python to c++ via cython
* [ARROW-2795](https://issues.apache.org/jira/browse/ARROW-2795) - [Python] Run TensorFlow import workaround only on Linux
* [ARROW-2806](https://issues.apache.org/jira/browse/ARROW-2806) - [Python] Inconsistent handling of np.nan
* [ARROW-2810](https://issues.apache.org/jira/browse/ARROW-2810) - [Plasma] Plasma public headers leak flatbuffers.h
* [ARROW-2812](https://issues.apache.org/jira/browse/ARROW-2812) - [Ruby] StructArray\#[] raises NoMethodError
* [ARROW-2820](https://issues.apache.org/jira/browse/ARROW-2820) - [Python] RecordBatch.from\_arrays does not validate array lengths are all equal
* [ARROW-2823](https://issues.apache.org/jira/browse/ARROW-2823) - [C++] Search for flatbuffers in <root\>/lib64
* [ARROW-2841](https://issues.apache.org/jira/browse/ARROW-2841) - [Go] Fix recent Go build failures in Travis CI
* [ARROW-2850](https://issues.apache.org/jira/browse/ARROW-2850) - [C++/Python] PARQUET\_RPATH\_ORIGIN=ON missing in manylinux1 build
* [ARROW-2851](https://issues.apache.org/jira/browse/ARROW-2851) - [C++] Update RAT excludes for new install file names
* [ARROW-2852](https://issues.apache.org/jira/browse/ARROW-2852) - [Rust] Mark Array as Sync and Send
* [ARROW-2856](https://issues.apache.org/jira/browse/ARROW-2856) - [Python/C++] Array constructor should not truncate floats when casting to int
* [ARROW-2862](https://issues.apache.org/jira/browse/ARROW-2862) - [C++] Ensure thirdparty download directory has been created in thirdparty/download\_thirdparty.sh
* [ARROW-2867](https://issues.apache.org/jira/browse/ARROW-2867) - [Python] Incorrect example for Cython usage
* [ARROW-2871](https://issues.apache.org/jira/browse/ARROW-2871) - [Python] Array.to\_numpy is invalid for boolean arrays
* [ARROW-2872](https://issues.apache.org/jira/browse/ARROW-2872) - [Python] Add pytest mark to opt into TensorFlow-related unit tests
* [ARROW-2876](https://issues.apache.org/jira/browse/ARROW-2876) - [Packaging] Crossbow builds can hang if you cloned using SSH
* [ARROW-2877](https://issues.apache.org/jira/browse/ARROW-2877) - [Packaging] crossbow submit results in duplicate Travis CI build
* [ARROW-2878](https://issues.apache.org/jira/browse/ARROW-2878) - [Packaging] README.md does not mention setting GitHub API token in user's crossbow repo settings
* [ARROW-2883](https://issues.apache.org/jira/browse/ARROW-2883) - [Plasma] Compilation warnings
* [ARROW-2891](https://issues.apache.org/jira/browse/ARROW-2891) - [Python] Preserve schema in write\_to\_dataset
* [ARROW-2894](https://issues.apache.org/jira/browse/ARROW-2894) - [Glib] Format tests broken due to recent refactor
* [ARROW-2895](https://issues.apache.org/jira/browse/ARROW-2895) - [Ruby] CI isn't ran when C++ is changed
* [ARROW-2896](https://issues.apache.org/jira/browse/ARROW-2896) - [GLib] export are missing
* [ARROW-2901](https://issues.apache.org/jira/browse/ARROW-2901) - [Java] Build is failing on Java9
* [ARROW-2902](https://issues.apache.org/jira/browse/ARROW-2902) - [Python] HDFS Docker integration tests leave around files created by root
* [ARROW-2903](https://issues.apache.org/jira/browse/ARROW-2903) - [C++] Setting -DARROW\_HDFS=OFF breaks arrow build when linking against boost libraries
* [ARROW-2911](https://issues.apache.org/jira/browse/ARROW-2911) - [Python] Parquet binary statistics that end in '\0' truncate last byte
* [ARROW-2917](https://issues.apache.org/jira/browse/ARROW-2917) - [Python] Tensor requiring gradiant cannot be serialized with pyarrow.serialize
* [ARROW-2920](https://issues.apache.org/jira/browse/ARROW-2920) - [Python] Segfault with pytorch 0.4
* [ARROW-2926](https://issues.apache.org/jira/browse/ARROW-2926) - [Python] ParquetWriter segfaults in example where passed schema and table schema do not match
* [ARROW-2930](https://issues.apache.org/jira/browse/ARROW-2930) - [C++] Trying to set target properties on not existing CMake target
* [ARROW-2940](https://issues.apache.org/jira/browse/ARROW-2940) - [Python] Import error with pytorch 0.3
* [ARROW-2945](https://issues.apache.org/jira/browse/ARROW-2945) - [Packaging] Update argument check for 02-source.sh
* [ARROW-2955](https://issues.apache.org/jira/browse/ARROW-2955) - [Python] Typo in pyarrow's HDFS API result
* [ARROW-2963](https://issues.apache.org/jira/browse/ARROW-2963) - [Python] Deadlock during fork-join and use\_threads=True
* [ARROW-2978](https://issues.apache.org/jira/browse/ARROW-2978) - [Rust] Travis CI build is failing
* [ARROW-2982](https://issues.apache.org/jira/browse/ARROW-2982) - The "--show-progress" option is only supported in wget 1.16 and higher
* [ARROW-3210](https://issues.apache.org/jira/browse/ARROW-3210) - [Python] Creating ParquetDataset creates partitioned ParquetFiles with mismatched Parquet schemas


## New Features and Improvements

* [ARROW-530](https://issues.apache.org/jira/browse/ARROW-530) - C++/Python: Provide subpools for better memory allocation tracking
* [ARROW-564](https://issues.apache.org/jira/browse/ARROW-564) - [Python] Add methods to return vanilla NumPy arrays (plus boolean mask array if there are nulls)
* [ARROW-665](https://issues.apache.org/jira/browse/ARROW-665) - C++: Move zeroing logic for (re)allocations to the Allocator
* [ARROW-889](https://issues.apache.org/jira/browse/ARROW-889) - [C++] Implement arrow::PrettyPrint for ChunkedArray
* [ARROW-902](https://issues.apache.org/jira/browse/ARROW-902) - [C++] Build C++ project including thirdparty dependencies from local tarballs
* [ARROW-906](https://issues.apache.org/jira/browse/ARROW-906) - [C++] Serialize Field metadata to IPC metadata
* [ARROW-1018](https://issues.apache.org/jira/browse/ARROW-1018) - [C++] Add option to create FileOutputStream, ReadableFile from OS file descriptor
* [ARROW-1163](https://issues.apache.org/jira/browse/ARROW-1163) - [Plasma][Java] Java client for Plasma
* [ARROW-1388](https://issues.apache.org/jira/browse/ARROW-1388) - [Python] Add Table.drop method for removing columns
* [ARROW-1454](https://issues.apache.org/jira/browse/ARROW-1454) - [Python] More informative error message when attempting to write an unsupported Arrow type to Parquet format
* [ARROW-1715](https://issues.apache.org/jira/browse/ARROW-1715) - [Python] Implement pickling for Column, ChunkedArray, RecordBatch, Table
* [ARROW-1722](https://issues.apache.org/jira/browse/ARROW-1722) - [C++] Add linting script to look for C++/CLI issues
* [ARROW-1731](https://issues.apache.org/jira/browse/ARROW-1731) - [Python] Provide for selecting a subset of columns to convert in RecordBatch/Table.from\_pandas
* [ARROW-1744](https://issues.apache.org/jira/browse/ARROW-1744) - [Plasma] Provide TensorFlow operator to read tensors from plasma
* [ARROW-1780](https://issues.apache.org/jira/browse/ARROW-1780) - [Java] JDBC Adapter for Apache Arrow
* [ARROW-1858](https://issues.apache.org/jira/browse/ARROW-1858) - [Python] Add documentation about parquet.write\_to\_dataset and related methods
* [ARROW-1868](https://issues.apache.org/jira/browse/ARROW-1868) - [Java] Change vector getMinorType to use MinorType instead of Types.MinorType
* [ARROW-1886](https://issues.apache.org/jira/browse/ARROW-1886) - [Python] Add function to "flatten" structs within tables
* [ARROW-1913](https://issues.apache.org/jira/browse/ARROW-1913) - [Java] Fix Javadoc generation bugs with JDK8
* [ARROW-1928](https://issues.apache.org/jira/browse/ARROW-1928) - [C++] Add benchmarks comparing performance of internal::BitmapReader/Writer with naive approaches
* [ARROW-1954](https://issues.apache.org/jira/browse/ARROW-1954) - [Python] Add metadata accessor to pyarrow.Field
* [ARROW-1964](https://issues.apache.org/jira/browse/ARROW-1964) - [Python] Expose Builder classes
* [ARROW-2014](https://issues.apache.org/jira/browse/ARROW-2014) - [Python] Document read\_pandas method in pyarrow.parquet
* [ARROW-2055](https://issues.apache.org/jira/browse/ARROW-2055) - [Java] Upgrade to Java 8
* [ARROW-2060](https://issues.apache.org/jira/browse/ARROW-2060) - [Python] Documentation for creating StructArray using from\_arrays or a sequence of dicts
* [ARROW-2061](https://issues.apache.org/jira/browse/ARROW-2061) - [C++] Run ASAN builds in Travis CI
* [ARROW-2074](https://issues.apache.org/jira/browse/ARROW-2074) - [Python] Allow type inference for struct arrays
* [ARROW-2097](https://issues.apache.org/jira/browse/ARROW-2097) - [Python] Suppress valgrind stdout/stderr in Travis CI builds when there are no errors
* [ARROW-2100](https://issues.apache.org/jira/browse/ARROW-2100) - [Python] Drop Python 3.4 support
* [ARROW-2140](https://issues.apache.org/jira/browse/ARROW-2140) - [Python] Conversion from Numpy float16 array unimplemented
* [ARROW-2141](https://issues.apache.org/jira/browse/ARROW-2141) - [Python] Conversion from Numpy object array to varsize binary unimplemented
* [ARROW-2147](https://issues.apache.org/jira/browse/ARROW-2147) - [Python] Type inference doesn't work on lists of Numpy arrays
* [ARROW-2207](https://issues.apache.org/jira/browse/ARROW-2207) - [GLib] Support decimal type
* [ARROW-2222](https://issues.apache.org/jira/browse/ARROW-2222) - [C++] Add option to validate Flatbuffers messages
* [ARROW-2224](https://issues.apache.org/jira/browse/ARROW-2224) - [C++] Get rid of boost regex usage
* [ARROW-2241](https://issues.apache.org/jira/browse/ARROW-2241) - [Python] Simple script for running all current ASV benchmarks at a commit or tag
* [ARROW-2264](https://issues.apache.org/jira/browse/ARROW-2264) - [Python] Efficiently serialize numpy arrays with dtype of unicode fixed length string
* [ARROW-2267](https://issues.apache.org/jira/browse/ARROW-2267) - Rust bindings
* [ARROW-2276](https://issues.apache.org/jira/browse/ARROW-2276) - [Python] Tensor could implement the buffer protocol
* [ARROW-2281](https://issues.apache.org/jira/browse/ARROW-2281) - [Python] Expose MakeArray to construct arrays from buffers
* [ARROW-2285](https://issues.apache.org/jira/browse/ARROW-2285) - [Python] Can't convert Numpy string arrays
* [ARROW-2286](https://issues.apache.org/jira/browse/ARROW-2286) - [Python] Allow subscripting pyarrow.lib.StructValue
* [ARROW-2287](https://issues.apache.org/jira/browse/ARROW-2287) - [Python] chunked array not iterable, not indexable
* [ARROW-2299](https://issues.apache.org/jira/browse/ARROW-2299) - [Go] Go language implementation
* [ARROW-2301](https://issues.apache.org/jira/browse/ARROW-2301) - [Python] Add source distribution publishing instructions to package / release management documentation
* [ARROW-2302](https://issues.apache.org/jira/browse/ARROW-2302) - [GLib] Run autotools and meson Linux builds in same Travis CI build entry
* [ARROW-2308](https://issues.apache.org/jira/browse/ARROW-2308) - Serialized tensor data should be 64-byte aligned.
* [ARROW-2315](https://issues.apache.org/jira/browse/ARROW-2315) - [C++/Python] Add method to flatten a struct array
* [ARROW-2319](https://issues.apache.org/jira/browse/ARROW-2319) - [C++] Add buffered output class implementing OutputStream interface
* [ARROW-2322](https://issues.apache.org/jira/browse/ARROW-2322) - Document requirements to run dev/release/01-perform.sh
* [ARROW-2325](https://issues.apache.org/jira/browse/ARROW-2325) - [Python] Update setup.py to use Markdown project description
* [ARROW-2330](https://issues.apache.org/jira/browse/ARROW-2330) - [C++] Optimize delta buffer creation with partially finishable array builders
* [ARROW-2332](https://issues.apache.org/jira/browse/ARROW-2332) - [Python] Provide API for reading multiple Feather files
* [ARROW-2332](https://issues.apache.org/jira/browse/ARROW-2332) - [Python] Provide API for reading multiple Feather files
* [ARROW-2334](https://issues.apache.org/jira/browse/ARROW-2334) - [C++] Update boost to 1.66.0
* [ARROW-2335](https://issues.apache.org/jira/browse/ARROW-2335) - [Go] Move Go README one directory higher
* [ARROW-2340](https://issues.apache.org/jira/browse/ARROW-2340) - [Website] Add blog post about Go codebase donation
* [ARROW-2341](https://issues.apache.org/jira/browse/ARROW-2341) - [Python] pa.union() mode argument unintuitive
* [ARROW-2343](https://issues.apache.org/jira/browse/ARROW-2343) - [Java/Packaging] Run mvn clean in API doc builds
* [ARROW-2344](https://issues.apache.org/jira/browse/ARROW-2344) - [Go] Run Go unit tests in Travis CI
* [ARROW-2345](https://issues.apache.org/jira/browse/ARROW-2345) - [Documentation] Fix bundle exec and set sphinx nosidebar to True
* [ARROW-2348](https://issues.apache.org/jira/browse/ARROW-2348) - [GLib] Remove Go example
* [ARROW-2350](https://issues.apache.org/jira/browse/ARROW-2350) - Shrink size of spark\_integration Docker container
* [ARROW-2353](https://issues.apache.org/jira/browse/ARROW-2353) - Test correctness of built wheel on AppVeyor
* [ARROW-2361](https://issues.apache.org/jira/browse/ARROW-2361) - [Rust] Start native Rust Implementation
* [ARROW-2364](https://issues.apache.org/jira/browse/ARROW-2364) - [Plasma] PlasmaClient::Get() could take vector of object ids
* [ARROW-2376](https://issues.apache.org/jira/browse/ARROW-2376) - [Rust] Travis should run tests for Rust library
* [ARROW-2378](https://issues.apache.org/jira/browse/ARROW-2378) - [Rust] Use rustfmt to format source code
* [ARROW-2381](https://issues.apache.org/jira/browse/ARROW-2381) - [Rust] Buffer<T\> should have an Iterator
* [ARROW-2384](https://issues.apache.org/jira/browse/ARROW-2384) - Rust: Use Traits rather than defining methods directly
* [ARROW-2385](https://issues.apache.org/jira/browse/ARROW-2385) - [Rust] Implement to\_json() for Field and DataType
* [ARROW-2388](https://issues.apache.org/jira/browse/ARROW-2388) - [C++] Arrow::StringBuilder::Append() uses null\_bytes not valid\_bytes
* [ARROW-2389](https://issues.apache.org/jira/browse/ARROW-2389) - [C++] Add StatusCode::OverflowError
* [ARROW-2390](https://issues.apache.org/jira/browse/ARROW-2390) - [C++/Python] CheckPyError() could inspect exception type
* [ARROW-2394](https://issues.apache.org/jira/browse/ARROW-2394) - [Python] Correct flake8 errors in benchmarks
* [ARROW-2395](https://issues.apache.org/jira/browse/ARROW-2395) - [Python] Correct flake8 errors outside of pyarrow/ directory
* [ARROW-2396](https://issues.apache.org/jira/browse/ARROW-2396) - Unify Rust Errors
* [ARROW-2397](https://issues.apache.org/jira/browse/ARROW-2397) - Document changes in Tensor encoding in IPC.md.
* [ARROW-2398](https://issues.apache.org/jira/browse/ARROW-2398) - [Rust] Provide a zero-copy builder for type-safe Buffer<T\>
* [ARROW-2400](https://issues.apache.org/jira/browse/ARROW-2400) - [C++] Status destructor is expensive
* [ARROW-2401](https://issues.apache.org/jira/browse/ARROW-2401) - Support filters on Hive partitioned Parquet files
* [ARROW-2402](https://issues.apache.org/jira/browse/ARROW-2402) - [C++] FixedSizeBinaryBuilder::Append lacks "const char\*" overload
* [ARROW-2404](https://issues.apache.org/jira/browse/ARROW-2404) - Fix declaration of 'type\_id' hides class member warning in msvc build
* [ARROW-2407](https://issues.apache.org/jira/browse/ARROW-2407) - [GLib] Add garrow\_string\_array\_builder\_append\_values()
* [ARROW-2408](https://issues.apache.org/jira/browse/ARROW-2408) - [Rust] It should be possible to get a &mut[T] from Builder<T\>
* [ARROW-2408](https://issues.apache.org/jira/browse/ARROW-2408) - [Rust] It should be possible to get a &mut[T] from Builder<T\>
* [ARROW-2411](https://issues.apache.org/jira/browse/ARROW-2411) - [C++] Add method to append batches of null-terminated strings to StringBuilder
* [ARROW-2413](https://issues.apache.org/jira/browse/ARROW-2413) - [Rust] Remove useless use of \`format!\`
* [ARROW-2414](https://issues.apache.org/jira/browse/ARROW-2414) - [Documentation] Fix miscellaneous documentation typos
* [ARROW-2415](https://issues.apache.org/jira/browse/ARROW-2415) - [Rust] Fix using references in pattern matching
* [ARROW-2416](https://issues.apache.org/jira/browse/ARROW-2416) - [C++] Support system libprotobuf
* [ARROW-2417](https://issues.apache.org/jira/browse/ARROW-2417) - [Rust] Review APIs for safety
* [ARROW-2422](https://issues.apache.org/jira/browse/ARROW-2422) - [Python] Support more filter operators on Hive partitioned Parquet files
* [ARROW-2427](https://issues.apache.org/jira/browse/ARROW-2427) - [C++] ReadAt implementations suboptimal
* [ARROW-2430](https://issues.apache.org/jira/browse/ARROW-2430) - MVP for branch based packaging automation
* [ARROW-2433](https://issues.apache.org/jira/browse/ARROW-2433) - [Rust] Add Builder.push\_slice(&[T])
* [ARROW-2434](https://issues.apache.org/jira/browse/ARROW-2434) - [Rust] Add windows support
* [ARROW-2435](https://issues.apache.org/jira/browse/ARROW-2435) - [Rust] Add memory pool abstraction.
* [ARROW-2436](https://issues.apache.org/jira/browse/ARROW-2436) - [Rust] Add windows CI
* [ARROW-2439](https://issues.apache.org/jira/browse/ARROW-2439) - [Rust] Run license header checks also in Rust CI entry
* [ARROW-2440](https://issues.apache.org/jira/browse/ARROW-2440) - [Rust] Implement ListBuilder<T\>
* [ARROW-2442](https://issues.apache.org/jira/browse/ARROW-2442) - [C++] Disambiguate Builder::Append overloads
* [ARROW-2445](https://issues.apache.org/jira/browse/ARROW-2445) - [Rust] Add documentation and make some fields private
* [ARROW-2448](https://issues.apache.org/jira/browse/ARROW-2448) - Segfault when plasma client goes out of scope before buffer.
* [ARROW-2451](https://issues.apache.org/jira/browse/ARROW-2451) - Handle more dtypes efficiently in custom numpy array serializer.
* [ARROW-2453](https://issues.apache.org/jira/browse/ARROW-2453) - [Python] Improve Table column access
* [ARROW-2458](https://issues.apache.org/jira/browse/ARROW-2458) - [Plasma] PlasmaClient uses global variable
* [ARROW-2463](https://issues.apache.org/jira/browse/ARROW-2463) - [C++] Update flatbuffers to 1.9.0
* [ARROW-2464](https://issues.apache.org/jira/browse/ARROW-2464) - [Python] Use a python\_version marker instead of a condition
* [ARROW-2469](https://issues.apache.org/jira/browse/ARROW-2469) - Make out arguments last in ReadMessage API.
* [ARROW-2470](https://issues.apache.org/jira/browse/ARROW-2470) - [C++] FileGetSize() should not seek
* [ARROW-2472](https://issues.apache.org/jira/browse/ARROW-2472) - [Rust] The Schema and Fields types should not have public attributes
* [ARROW-2477](https://issues.apache.org/jira/browse/ARROW-2477) - [Rust] Set up code coverage in CI
* [ARROW-2478](https://issues.apache.org/jira/browse/ARROW-2478) - [C++] Introduce a checked\_cast function that performs a dynamic\_cast in debug mode
* [ARROW-2479](https://issues.apache.org/jira/browse/ARROW-2479) - [C++] Have a global thread pool
* [ARROW-2480](https://issues.apache.org/jira/browse/ARROW-2480) - [C++] Enable casting the value of a decimal to int32\_t or int64\_t
* [ARROW-2481](https://issues.apache.org/jira/browse/ARROW-2481) - [Rust] Move calls to free() into memory.rs
* [ARROW-2482](https://issues.apache.org/jira/browse/ARROW-2482) - [Rust] support nested types
* [ARROW-2484](https://issues.apache.org/jira/browse/ARROW-2484) - [C++] Document ABI compliance checking
* [ARROW-2485](https://issues.apache.org/jira/browse/ARROW-2485) - [C++] Output diff when run\_clang\_format.py reports a change
* [ARROW-2486](https://issues.apache.org/jira/browse/ARROW-2486) - [C++/Python] Provide a Docker image that contains all dependencies for development
* [ARROW-2488](https://issues.apache.org/jira/browse/ARROW-2488) - [C++] List Boost 1.67 as supported version
* [ARROW-2493](https://issues.apache.org/jira/browse/ARROW-2493) - [Python] Add support for pickling to buffers and arrays
* [ARROW-2494](https://issues.apache.org/jira/browse/ARROW-2494) - Return status codes from PlasmaClient::Seal
* [ARROW-2498](https://issues.apache.org/jira/browse/ARROW-2498) - [Java] Upgrade to JDK 1.8
* [ARROW-2499](https://issues.apache.org/jira/browse/ARROW-2499) - [C++] Add iterator facility for Python sequences
* [ARROW-2505](https://issues.apache.org/jira/browse/ARROW-2505) - [C++] Disable MSVC warning C4800
* [ARROW-2506](https://issues.apache.org/jira/browse/ARROW-2506) - [Plasma] Build error on macOS
* [ARROW-2507](https://issues.apache.org/jira/browse/ARROW-2507) - [Rust] Don't take a reference when not needed
* [ARROW-2508](https://issues.apache.org/jira/browse/ARROW-2508) - [Python] pytest API changes make tests fail
* [ARROW-2513](https://issues.apache.org/jira/browse/ARROW-2513) - [Python] DictionaryType should give access to index type and dictionary array
* [ARROW-2516](https://issues.apache.org/jira/browse/ARROW-2516) - AppVeyor Build Matrix should be specific to the changes made in a PR
* [ARROW-2521](https://issues.apache.org/jira/browse/ARROW-2521) - [Rust] Refactor Rust API to use traits and generics
* [ARROW-2522](https://issues.apache.org/jira/browse/ARROW-2522) - [C++] Version shared library files
* [ARROW-2525](https://issues.apache.org/jira/browse/ARROW-2525) - [GLib] Add garrow\_struct\_array\_flatten()
* [ARROW-2526](https://issues.apache.org/jira/browse/ARROW-2526) - [GLib] Update .gitignore
* [ARROW-2527](https://issues.apache.org/jira/browse/ARROW-2527) - [GLib] Enable GPU document
* [ARROW-2528](https://issues.apache.org/jira/browse/ARROW-2528) - [Rust] Add trait bounds for T in Buffer/List
* [ARROW-2529](https://issues.apache.org/jira/browse/ARROW-2529) - [C++] Update mention of clang-format to 5.0 in the docs
* [ARROW-2531](https://issues.apache.org/jira/browse/ARROW-2531) - [C++] Update clang bits to 6.0
* [ARROW-2533](https://issues.apache.org/jira/browse/ARROW-2533) - [CI] Fast finish failing AppVeyor builds
* [ARROW-2536](https://issues.apache.org/jira/browse/ARROW-2536) - [Rust] ListBuilder uses wrong initial size for offset builder
* [ARROW-2537](https://issues.apache.org/jira/browse/ARROW-2537) - [Ruby] Import
* [ARROW-2539](https://issues.apache.org/jira/browse/ARROW-2539) - [Plasma] Use unique\_ptr instead of raw pointer
* [ARROW-2540](https://issues.apache.org/jira/browse/ARROW-2540) - [Plasma] add constructor/destructor to make sure dlfree is called automatically
* [ARROW-2541](https://issues.apache.org/jira/browse/ARROW-2541) - [Plasma] Clean up macro usage
* [ARROW-2543](https://issues.apache.org/jira/browse/ARROW-2543) - [Rust] CI should cache dependencies for faster builds
* [ARROW-2544](https://issues.apache.org/jira/browse/ARROW-2544) - [CI] Run C++ tests with two jobs on Travis-CI
* [ARROW-2547](https://issues.apache.org/jira/browse/ARROW-2547) - [Format] Fix off-by-one in List<List<byte\>\> example
* [ARROW-2548](https://issues.apache.org/jira/browse/ARROW-2548) - [Format] Clarify \`List<Char\>\` Array example
* [ARROW-2549](https://issues.apache.org/jira/browse/ARROW-2549) - [GLib] Apply arrow::StatusCodes changes to GArrowError
* [ARROW-2550](https://issues.apache.org/jira/browse/ARROW-2550) - [C++] Add missing status codes into arrow::StatusCode::CodeAsString()
* [ARROW-2551](https://issues.apache.org/jira/browse/ARROW-2551) - [Plasma] Improve notification logic
* [ARROW-2552](https://issues.apache.org/jira/browse/ARROW-2552) - [Plasma] Unit tests are flaky
* [ARROW-2553](https://issues.apache.org/jira/browse/ARROW-2553) - [Python] Set MACOSX\_DEPLOYMENT\_TARGET in wheel build
* [ARROW-2558](https://issues.apache.org/jira/browse/ARROW-2558) - [Plasma] avoid walk through all the objects when a client disconnects
* [ARROW-2562](https://issues.apache.org/jira/browse/ARROW-2562) - [C++] Upload coverage data to codecov.io
* [ARROW-2563](https://issues.apache.org/jira/browse/ARROW-2563) - [Rust] Poor caching in Travis-CI
* [ARROW-2566](https://issues.apache.org/jira/browse/ARROW-2566) - [CI] Add codecov.io badge to README
* [ARROW-2567](https://issues.apache.org/jira/browse/ARROW-2567) - [C++/Python] Unit is ignored on comparison of TimestampArrays
* [ARROW-2568](https://issues.apache.org/jira/browse/ARROW-2568) - [Python] Expose thread pool size setting to Python, and deprecate "nthreads"
* [ARROW-2569](https://issues.apache.org/jira/browse/ARROW-2569) - [C++] Improve thread pool size heuristic
* [ARROW-2574](https://issues.apache.org/jira/browse/ARROW-2574) - [CI] Collect and publish Python coverage
* [ARROW-2576](https://issues.apache.org/jira/browse/ARROW-2576) - [GLib] Add abs functions for Decimal128.
* [ARROW-2577](https://issues.apache.org/jira/browse/ARROW-2577) - [Plasma] Add ASV benchmarks
* [ARROW-2580](https://issues.apache.org/jira/browse/ARROW-2580) - [GLib] Fix abs functions for Decimal128
* [ARROW-2582](https://issues.apache.org/jira/browse/ARROW-2582) - [GLib] Add negate functions for Decimal128
* [ARROW-2585](https://issues.apache.org/jira/browse/ARROW-2585) - [C++] Add Decimal128::FromBigEndian
* [ARROW-2586](https://issues.apache.org/jira/browse/ARROW-2586) - [C++] Make child builders of ListBuilder and StructBuilder shared\_ptr's
* [ARROW-2595](https://issues.apache.org/jira/browse/ARROW-2595) - [Plasma] operator[] creates entries in map
* [ARROW-2596](https://issues.apache.org/jira/browse/ARROW-2596) - [GLib] Use the default value of GTK-Doc
* [ARROW-2597](https://issues.apache.org/jira/browse/ARROW-2597) - [Plasma] remove UniqueIDHasher
* [ARROW-2604](https://issues.apache.org/jira/browse/ARROW-2604) - [Java] Add method overload for VarCharVector.set(int,String)
* [ARROW-2608](https://issues.apache.org/jira/browse/ARROW-2608) - [Java/Python] Add pyarrow.{Array,Field}.from\_jvm / jvm\_buffer
* [ARROW-2611](https://issues.apache.org/jira/browse/ARROW-2611) - [Python] Python 2 integer serialization
* [ARROW-2612](https://issues.apache.org/jira/browse/ARROW-2612) - [Plasma] Fix deprecated PLASMA\_DEFAULT\_RELEASE\_DELAY
* [ARROW-2613](https://issues.apache.org/jira/browse/ARROW-2613) - [Docs] Update the gen\_apidocs docker script
* [ARROW-2614](https://issues.apache.org/jira/browse/ARROW-2614) - [CI] Remove 'group: deprecated' in Travis
* [ARROW-2626](https://issues.apache.org/jira/browse/ARROW-2626) - [Python] pandas ArrowInvalid message should include failing column name
* [ARROW-2634](https://issues.apache.org/jira/browse/ARROW-2634) - [Go] Add LICENSE additions for Go subproject
* [ARROW-2635](https://issues.apache.org/jira/browse/ARROW-2635) - [Ruby] LICENSE.txt isn't suitable
* [ARROW-2636](https://issues.apache.org/jira/browse/ARROW-2636) - [Ruby] "Unofficial" package note is missing
* [ARROW-2638](https://issues.apache.org/jira/browse/ARROW-2638) - [Python] Prevent calling extension class constructors directly
* [ARROW-2639](https://issues.apache.org/jira/browse/ARROW-2639) - [Python] Remove unnecessary \_check\_nullptr methods
* [ARROW-2641](https://issues.apache.org/jira/browse/ARROW-2641) - [C++] Investigate spurious memset() calls
* [ARROW-2645](https://issues.apache.org/jira/browse/ARROW-2645) - [Java] ArrowStreamWriter accumulates DictionaryBatch ArrowBlocks
* [ARROW-2649](https://issues.apache.org/jira/browse/ARROW-2649) - [C++] Add std::generate()-like function for faster bitmap writing
* [ARROW-2656](https://issues.apache.org/jira/browse/ARROW-2656) - [Python] Improve ParquetManifest creation time
* [ARROW-2660](https://issues.apache.org/jira/browse/ARROW-2660) - [Python] Experiment with zero-copy pickling
* [ARROW-2661](https://issues.apache.org/jira/browse/ARROW-2661) - [Python/C++] Allow passing HDFS Config values via map/dict instead of needing an hdfs-site.xml file
* [ARROW-2662](https://issues.apache.org/jira/browse/ARROW-2662) - [Python] Add to\_pandas / to\_numpy to ChunkedArray
* [ARROW-2663](https://issues.apache.org/jira/browse/ARROW-2663) - [Python] Make dictionary\_encode and unique accesible on Column / ChunkedArray
* [ARROW-2664](https://issues.apache.org/jira/browse/ARROW-2664) - [Python] Implement \_\_getitem\_\_ / slicing on Buffer
* [ARROW-2666](https://issues.apache.org/jira/browse/ARROW-2666) - [Python] numpy.asarray should trigger to\_pandas on Array/ChunkedArray
* [ARROW-2672](https://issues.apache.org/jira/browse/ARROW-2672) - [Python] Build ORC extension in manylinux1 wheels
* [ARROW-2674](https://issues.apache.org/jira/browse/ARROW-2674) - [Packaging] Start building nightlies
* [ARROW-2676](https://issues.apache.org/jira/browse/ARROW-2676) - [Packaging] Deploy build artifacts to github releases
* [ARROW-2677](https://issues.apache.org/jira/browse/ARROW-2677) - [Python] Expose Parquet ZSTD compression
* [ARROW-2678](https://issues.apache.org/jira/browse/ARROW-2678) - [GLib] Add extra information to common build problems on macOS
* [ARROW-2680](https://issues.apache.org/jira/browse/ARROW-2680) - [Python] Add documentation about type inference in Table.from\_pandas
* [ARROW-2682](https://issues.apache.org/jira/browse/ARROW-2682) - [CI] Notify in Slack about broken builds
* [ARROW-2689](https://issues.apache.org/jira/browse/ARROW-2689) - [Python] Remove references to timestamps\_to\_ms argument from documentation
* [ARROW-2692](https://issues.apache.org/jira/browse/ARROW-2692) - [Python] Add test for writing dictionary encoded columns to chunked Parquet files
* [ARROW-2695](https://issues.apache.org/jira/browse/ARROW-2695) - [Python] Prevent calling scalar contructors directly
* [ARROW-2696](https://issues.apache.org/jira/browse/ARROW-2696) - [JAVA] enhance AllocationListener with an onFailedAllocation() call
* [ARROW-2699](https://issues.apache.org/jira/browse/ARROW-2699) - [C++/Python] Add Table method that replaces a column with a new supplied column
* [ARROW-2700](https://issues.apache.org/jira/browse/ARROW-2700) - [Python] Add simple examples to Array.cast docstring
* [ARROW-2701](https://issues.apache.org/jira/browse/ARROW-2701) - [C++] Make MemoryMappedFile resizable
* [ARROW-2704](https://issues.apache.org/jira/browse/ARROW-2704) - [Java] IPC stream handling should be more friendly to low level processing
* [ARROW-2713](https://issues.apache.org/jira/browse/ARROW-2713) - [Packaging] Fix linux package builds
* [ARROW-2717](https://issues.apache.org/jira/browse/ARROW-2717) - [Packaging] Postfix conda artifacts with target arch
* [ARROW-2718](https://issues.apache.org/jira/browse/ARROW-2718) - [Packaging] GPG sign downloaded artifacts
* [ARROW-2724](https://issues.apache.org/jira/browse/ARROW-2724) - [Packaging] Determine whether all the expected artifacts are uploaded
* [ARROW-2725](https://issues.apache.org/jira/browse/ARROW-2725) - [JAVA] make Accountant.AllocationOutcome publicly visible
* [ARROW-2729](https://issues.apache.org/jira/browse/ARROW-2729) - [GLib] Add decimal128 array builder
* [ARROW-2731](https://issues.apache.org/jira/browse/ARROW-2731) - Allow usage of external ORC library
* [ARROW-2732](https://issues.apache.org/jira/browse/ARROW-2732) - Update brew packages for macOS
* [ARROW-2733](https://issues.apache.org/jira/browse/ARROW-2733) - [GLib] Cast garrow\_decimal128 to gint64
* [ARROW-2738](https://issues.apache.org/jira/browse/ARROW-2738) - [GLib] Use Brewfile on installation process
* [ARROW-2739](https://issues.apache.org/jira/browse/ARROW-2739) - [GLib] Use G\_DECLARE\_DERIVABLE\_TYPE for GArrowDecimalDataType and GArrowDecimal128ArrayBuilder
* [ARROW-2740](https://issues.apache.org/jira/browse/ARROW-2740) - [Python] Add address property to Buffer
* [ARROW-2742](https://issues.apache.org/jira/browse/ARROW-2742) - [Python] Allow Table.from\_batches to use Iterator of ArrowRecordBatches
* [ARROW-2748](https://issues.apache.org/jira/browse/ARROW-2748) - [GLib] Add garrow\_decimal\_data\_type\_get\_scale() (and \_precision())
* [ARROW-2749](https://issues.apache.org/jira/browse/ARROW-2749) - [GLib] Rename \*garrow\_decimal128\_array\_get\_value to \*garrow\_decimal128\_array\_format\_value
* [ARROW-2751](https://issues.apache.org/jira/browse/ARROW-2751) - [GLib] Add garrow\_table\_replace\_column()
* [ARROW-2752](https://issues.apache.org/jira/browse/ARROW-2752) - [GLib] Document garrow\_decimal\_data\_type\_new()
* [ARROW-2753](https://issues.apache.org/jira/browse/ARROW-2753) - [GLib] Add garrow\_schema\_\*\_field()
* [ARROW-2755](https://issues.apache.org/jira/browse/ARROW-2755) - [Python] Allow using Ninja to build extension
* [ARROW-2756](https://issues.apache.org/jira/browse/ARROW-2756) - [Python] Remove redundant imports and minor fixes in parquet tests
* [ARROW-2758](https://issues.apache.org/jira/browse/ARROW-2758) - [Plasma] Use Scope enum in Plasma
* [ARROW-2760](https://issues.apache.org/jira/browse/ARROW-2760) - [Python] Remove legacy property definition syntax from parquet module and test them
* [ARROW-2761](https://issues.apache.org/jira/browse/ARROW-2761) - Support set filter operators on Hive partitioned Parquet files
* [ARROW-2763](https://issues.apache.org/jira/browse/ARROW-2763) - [Python] Make parquet \_metadata file accessible from ParquetDataset
* [ARROW-2780](https://issues.apache.org/jira/browse/ARROW-2780) - [Go] Run code coverage analysis
* [ARROW-2784](https://issues.apache.org/jira/browse/ARROW-2784) - [C++] MemoryMappedFile::WriteAt allow writing past the end
* [ARROW-2790](https://issues.apache.org/jira/browse/ARROW-2790) - [C++] Buffers contain uninitialized memory
* [ARROW-2790](https://issues.apache.org/jira/browse/ARROW-2790) - [C++] Buffers contain uninitialized memory
* [ARROW-2791](https://issues.apache.org/jira/browse/ARROW-2791) - [Packaging] Build Ubuntu 18.04 packages
* [ARROW-2792](https://issues.apache.org/jira/browse/ARROW-2792) - [Packaging] Consider uploading tarballs to avoid naming conflicts
* [ARROW-2794](https://issues.apache.org/jira/browse/ARROW-2794) - [Plasma] Add Delete method for multiple objects
* [ARROW-2798](https://issues.apache.org/jira/browse/ARROW-2798) - [Plasma] Use hashing function that takes into account all UniqueID bytes
* [ARROW-2802](https://issues.apache.org/jira/browse/ARROW-2802) - [Docs] Move release management guide to project wiki
* [ARROW-2804](https://issues.apache.org/jira/browse/ARROW-2804) - [Website] Link to Developer wiki (Confluence) from front page
* [ARROW-2805](https://issues.apache.org/jira/browse/ARROW-2805) - [Python] TensorFlow import workaround not working with tensorflow-gpu if CUDA is not installed
* [ARROW-2809](https://issues.apache.org/jira/browse/ARROW-2809) - [C++] Decrease verbosity of lint checks in Travis CI
* [ARROW-2811](https://issues.apache.org/jira/browse/ARROW-2811) - [Python] Test serialization for determinism
* [ARROW-2815](https://issues.apache.org/jira/browse/ARROW-2815) - [CI] Suppress DEBUG logging when building Java library in C++ CI entries
* [ARROW-2816](https://issues.apache.org/jira/browse/ARROW-2816) - [Python] Add \_\_iter\_\_ method to NativeFile
* [ARROW-2821](https://issues.apache.org/jira/browse/ARROW-2821) - [C++] Only zero memory in BooleanBuilder in one place
* [ARROW-2822](https://issues.apache.org/jira/browse/ARROW-2822) - [C++] Zero padding bytes in PoolBuffer::Resize
* [ARROW-2822](https://issues.apache.org/jira/browse/ARROW-2822) - [C++] Zero padding bytes in PoolBuffer::Resize
* [ARROW-2824](https://issues.apache.org/jira/browse/ARROW-2824) - [GLib] Add garrow\_decimal128\_array\_get\_value()
* [ARROW-2825](https://issues.apache.org/jira/browse/ARROW-2825) - [C++] Need AllocateBuffer / AllocateResizableBuffer variant with default memory pool
* [ARROW-2826](https://issues.apache.org/jira/browse/ARROW-2826) - [C++] Clarification needed between ArrayBuilder::Init(), Resize() and Reserve()
* [ARROW-2827](https://issues.apache.org/jira/browse/ARROW-2827) - [C++] LZ4 and Zstd build may be failed in parallel build
* [ARROW-2829](https://issues.apache.org/jira/browse/ARROW-2829) - [GLib] Add GArrowORCFileReader
* [ARROW-2830](https://issues.apache.org/jira/browse/ARROW-2830) - [Packaging] Enable parallel build for deb package build again
* [ARROW-2832](https://issues.apache.org/jira/browse/ARROW-2832) - [Python] Pretty-print schema metadata in Schema.\_\_repr\_\_
* [ARROW-2833](https://issues.apache.org/jira/browse/ARROW-2833) - [Python] Column.\_\_repr\_\_ will lock up Jupyter with large datasets
* [ARROW-2834](https://issues.apache.org/jira/browse/ARROW-2834) - [GLib] Remove "enable\_" prefix from Meson options
* [ARROW-2836](https://issues.apache.org/jira/browse/ARROW-2836) - [Packaging] Expand build matrices to multiple tasks
* [ARROW-2837](https://issues.apache.org/jira/browse/ARROW-2837) - [C++] ArrayBuilder::null\_bitmap returns PoolBuffer
* [ARROW-2838](https://issues.apache.org/jira/browse/ARROW-2838) - [Python] Speed up null testing with Pandas semantics
* [ARROW-2844](https://issues.apache.org/jira/browse/ARROW-2844) - [Packaging] Test OSX wheels after build
* [ARROW-2845](https://issues.apache.org/jira/browse/ARROW-2845) - [Packaging] Upload additional debian artifacts
* [ARROW-2846](https://issues.apache.org/jira/browse/ARROW-2846) - [Packaging] Update nightly build in crossbow as well as the sample configuration
* [ARROW-2847](https://issues.apache.org/jira/browse/ARROW-2847) - [Packaging] Fix artifact name matching for conda forge packages
* [ARROW-2848](https://issues.apache.org/jira/browse/ARROW-2848) - [Packaging] lib\*.deb package name doesn't match so version
* [ARROW-2849](https://issues.apache.org/jira/browse/ARROW-2849) - [Ruby] Arrow::Table\#load supports ORC
* [ARROW-2855](https://issues.apache.org/jira/browse/ARROW-2855) - [C++] Blog post that outlines the benefits of using jemalloc
* [ARROW-2859](https://issues.apache.org/jira/browse/ARROW-2859) - [Python] Handle objects exporting the buffer protocol in open\_stream, open\_file, and RecordBatch\*Reader APIs
* [ARROW-2861](https://issues.apache.org/jira/browse/ARROW-2861) - [Python] Add extra tips about using Parquet to store index-less pandas data
* [ARROW-2864](https://issues.apache.org/jira/browse/ARROW-2864) - [Plasma] Add deletion cache to delete objects later
* [ARROW-2868](https://issues.apache.org/jira/browse/ARROW-2868) - [Packaging] Fix centos-7 build
* [ARROW-2869](https://issues.apache.org/jira/browse/ARROW-2869) - [Python] Add documentation for Array.to\_numpy
* [ARROW-2874](https://issues.apache.org/jira/browse/ARROW-2874) - [Packaging] Pass job prefix when putting on Queue
* [ARROW-2875](https://issues.apache.org/jira/browse/ARROW-2875) - [Packaging] Don't attempt to download arrow archive in linux builds
* [ARROW-2881](https://issues.apache.org/jira/browse/ARROW-2881) - [Website] Add Community tab to website
* [ARROW-2884](https://issues.apache.org/jira/browse/ARROW-2884) - [Packaging] Options to build packages from apache source archive
* [ARROW-2886](https://issues.apache.org/jira/browse/ARROW-2886) - [Release] An unused variable exists
* [ARROW-2890](https://issues.apache.org/jira/browse/ARROW-2890) - [Plasma] Make Python PlasmaClient.release private
* [ARROW-2893](https://issues.apache.org/jira/browse/ARROW-2893) - [C++] Remove PoolBuffer class from public API and hide implementation details behind factory functions
* [ARROW-2897](https://issues.apache.org/jira/browse/ARROW-2897) - Organize supported Ubuntu versions
* [ARROW-2898](https://issues.apache.org/jira/browse/ARROW-2898) - [Packaging] Setuptools\_scm just shipped a new version which fails to parse \`apache-arrow-<version\>\` tag
* [ARROW-2906](https://issues.apache.org/jira/browse/ARROW-2906) - [Website] Remove the link to slack channel
* [ARROW-2907](https://issues.apache.org/jira/browse/ARROW-2907) - [GitHub] Improve "How to contribute patches"
* [ARROW-2908](https://issues.apache.org/jira/browse/ARROW-2908) - [Rust] Update version to 0.10.0
* [ARROW-2914](https://issues.apache.org/jira/browse/ARROW-2914) - [Integration] Add WindowPandasUDFTests to Spark Integration
* [ARROW-2915](https://issues.apache.org/jira/browse/ARROW-2915) - [Packaging] Remove artifact form ubuntu-trusty build
* [ARROW-2918](https://issues.apache.org/jira/browse/ARROW-2918) - [C++] Improve formatting of Struct pretty prints
* [ARROW-2921](https://issues.apache.org/jira/browse/ARROW-2921) - [Release] Update .deb/.rpm changelos in preparation
* [ARROW-2922](https://issues.apache.org/jira/browse/ARROW-2922) - [Release] Make python command name customizable
* [ARROW-2923](https://issues.apache.org/jira/browse/ARROW-2923) - [Doc] Add instructions for running Spark integration tests
* [ARROW-2924](https://issues.apache.org/jira/browse/ARROW-2924) - [Java] mvn release fails when an older maven javadoc plugin is installed
* [ARROW-2927](https://issues.apache.org/jira/browse/ARROW-2927) - [Packaging] AppVeyor wheel task is failing on initial checkout
* [ARROW-2928](https://issues.apache.org/jira/browse/ARROW-2928) - [Packaging] AppVeyor crossbow conda builds are picking up boost 1.63.0 instead of the installed version
* [ARROW-2929](https://issues.apache.org/jira/browse/ARROW-2929) - [C++] ARROW-2826 Breaks parquet-cpp 1.4.0 builds
* [ARROW-2934](https://issues.apache.org/jira/browse/ARROW-2934) - [Packaging] Add checksums creation to sign subcommand
* [ARROW-2935](https://issues.apache.org/jira/browse/ARROW-2935) - [Packaging] Add verify\_binary\_artifacts function to verify-release-candidate.sh
* [ARROW-2937](https://issues.apache.org/jira/browse/ARROW-2937) - [Java] Follow-up changes to ARROW-2704
* [ARROW-2943](https://issues.apache.org/jira/browse/ARROW-2943) - [C++] Implement BufferedOutputStream::Flush
* [ARROW-2944](https://issues.apache.org/jira/browse/ARROW-2944) - [Format] Arrow columnar format docs mentions VectorLayout that does not exist anymore
* [ARROW-2946](https://issues.apache.org/jira/browse/ARROW-2946) - [Packaging] Stop to use PWD in debian/rules
* [ARROW-2947](https://issues.apache.org/jira/browse/ARROW-2947) - [Packaging] Remove Ubuntu Artful
* [ARROW-2949](https://issues.apache.org/jira/browse/ARROW-2949) - [CI] repo.continuum.io can be flaky in builds
* [ARROW-2951](https://issues.apache.org/jira/browse/ARROW-2951) - [CI] Changes in format/ should cause Appveyor builds to run
* [ARROW-2953](https://issues.apache.org/jira/browse/ARROW-2953) - [Plasma] Store memory usage
* [ARROW-2954](https://issues.apache.org/jira/browse/ARROW-2954) - [Plasma] Store object\_id only once in object table
* [ARROW-2962](https://issues.apache.org/jira/browse/ARROW-2962) - [Packaging] Bintray descriptor files are no longer needed
* [ARROW-2977](https://issues.apache.org/jira/browse/ARROW-2977) - [Packaging] Release verification script should check rust too
* [ARROW-2985](https://issues.apache.org/jira/browse/ARROW-2985) - [Ruby] Run unit tests in verify-release-candidate.sh
* [ARROW-2988](https://issues.apache.org/jira/browse/ARROW-2988) - [Release] More automated release verification on Windows
* [ARROW-2990](https://issues.apache.org/jira/browse/ARROW-2990) - [GLib] Fail to build with rpath-ed Arrow C++ on macOS



# Apache Arrow 0.9.0 (2018-03-19)

## New Features and Improvements

* [ARROW-232](https://issues.apache.org/jira/browse/ARROW-232) - C++/Parquet: Support writing chunked arrays as part of a table
* [ARROW-633](https://issues.apache.org/jira/browse/ARROW-633) - [Java] Add support for FixedSizeBinary type
* [ARROW-634](https://issues.apache.org/jira/browse/ARROW-634) - Add integration tests for FixedSizeBinary
* [ARROW-760](https://issues.apache.org/jira/browse/ARROW-760) - [Python] document differences w.r.t. fastparquet
* [ARROW-764](https://issues.apache.org/jira/browse/ARROW-764) - [C++] Improve performance of CopyBitmap, add benchmarks
* [ARROW-969](https://issues.apache.org/jira/browse/ARROW-969) - [C++/Python] Add add/remove field functions for RecordBatch
* [ARROW-1021](https://issues.apache.org/jira/browse/ARROW-1021) - [Python] Add documentation about using pyarrow from other Cython and C++ projects
* [ARROW-1035](https://issues.apache.org/jira/browse/ARROW-1035) - [Python] Add ASV benchmarks for streaming columnar deserialization
* [ARROW-1394](https://issues.apache.org/jira/browse/ARROW-1394) - [Plasma] Add optional extension for allocating memory on GPUs
* [ARROW-1463](https://issues.apache.org/jira/browse/ARROW-1463) - [JAVA] Restructure ValueVector hierarchy to minimize compile-time generated code
* [ARROW-1579](https://issues.apache.org/jira/browse/ARROW-1579) - [Java] Add dockerized test setup to validate Spark integration
* [ARROW-1580](https://issues.apache.org/jira/browse/ARROW-1580) - [Python] Instructions for setting up nightly builds on Linux
* [ARROW-1621](https://issues.apache.org/jira/browse/ARROW-1621) - [JAVA] Reduce Heap Usage per Vector
* [ARROW-1623](https://issues.apache.org/jira/browse/ARROW-1623) - [C++] Add convenience method to construct Buffer from a string that owns its memory
* [ARROW-1632](https://issues.apache.org/jira/browse/ARROW-1632) - [Python] Permit categorical conversions in Table.to\_pandas on a per-column basis
* [ARROW-1643](https://issues.apache.org/jira/browse/ARROW-1643) - [Python] Accept hdfs:// prefixes in parquet.read\_table and attempt to connect to HDFS
* [ARROW-1705](https://issues.apache.org/jira/browse/ARROW-1705) - [Python] Create StructArray from sequence of dicts given a known data type
* [ARROW-1706](https://issues.apache.org/jira/browse/ARROW-1706) - [Python] StructArray.from\_arrays should handle sequences that are coercible to arrays
* [ARROW-1712](https://issues.apache.org/jira/browse/ARROW-1712) - [C++] Add method to BinaryBuilder to reserve space for value data
* [ARROW-1757](https://issues.apache.org/jira/browse/ARROW-1757) - [C++] Add DictionaryArray::FromArrays alternate ctor that can check or sanitized "untrusted" indices
* [ARROW-1815](https://issues.apache.org/jira/browse/ARROW-1815) - [Java] Rename MapVector to StructVector
* [ARROW-1832](https://issues.apache.org/jira/browse/ARROW-1832) - [JS] Implement JSON reader for integration tests
* [ARROW-1835](https://issues.apache.org/jira/browse/ARROW-1835) - [C++] Create Arrow schema from std::tuple types
* [ARROW-1861](https://issues.apache.org/jira/browse/ARROW-1861) - [Python] Fix up ASV setup, add developer instructions for writing new benchmarks and running benchmark suite locally
* [ARROW-1872](https://issues.apache.org/jira/browse/ARROW-1872) - [Website] Populate hard-coded fields for current release from a YAML file
* [ARROW-1899](https://issues.apache.org/jira/browse/ARROW-1899) - [Python] Refactor handling of null sentinels in python/numpy\_to\_arrow.cc
* [ARROW-1920](https://issues.apache.org/jira/browse/ARROW-1920) - Add support for reading ORC files
* [ARROW-1926](https://issues.apache.org/jira/browse/ARROW-1926) - [GLib] Add garrow\_timestamp\_data\_type\_get\_unit()
* [ARROW-1927](https://issues.apache.org/jira/browse/ARROW-1927) - [Plasma] Implement delete function
* [ARROW-1929](https://issues.apache.org/jira/browse/ARROW-1929) - [C++] Move various Arrow testing utility code from Parquet to Arrow codebase
* [ARROW-1930](https://issues.apache.org/jira/browse/ARROW-1930) - [C++] Implement Slice for ChunkedArray and Column
* [ARROW-1931](https://issues.apache.org/jira/browse/ARROW-1931) - [C++] w4996 warning due to std::tr1 failing builds on Visual Studio 2017
* [ARROW-1937](https://issues.apache.org/jira/browse/ARROW-1937) - [Python] Add documentation for different forms of constructing nested arrays from Python data structures
* [ARROW-1942](https://issues.apache.org/jira/browse/ARROW-1942) - [C++] Hash table specializations for small integers
* [ARROW-1947](https://issues.apache.org/jira/browse/ARROW-1947) - [Plasma] Change Client Create and Get to use Buffers
* [ARROW-1951](https://issues.apache.org/jira/browse/ARROW-1951) - Add memcopy\_threads to serialization context
* [ARROW-1962](https://issues.apache.org/jira/browse/ARROW-1962) - [Java] Add reset() to ValueVector interface
* [ARROW-1965](https://issues.apache.org/jira/browse/ARROW-1965) - [GLib] Add garrow\_array\_builder\_get\_value\_data\_type() and garrow\_array\_builder\_get\_value\_type()
* [ARROW-1969](https://issues.apache.org/jira/browse/ARROW-1969) - [C++] Do not build ORC adapter by default
* [ARROW-1970](https://issues.apache.org/jira/browse/ARROW-1970) - [GLib] Add garrow\_chunked\_array\_get\_value\_data\_type() and garrow\_chunked\_array\_get\_value\_type()
* [ARROW-1977](https://issues.apache.org/jira/browse/ARROW-1977) - [C++] Update windows dev docs
* [ARROW-1978](https://issues.apache.org/jira/browse/ARROW-1978) - [Website] Add more visible link to "Powered By" page to front page, simplify Powered By
* [ARROW-2004](https://issues.apache.org/jira/browse/ARROW-2004) - [C++] Add shrink\_to\_fit option in BufferBuilder::Resize
* [ARROW-2007](https://issues.apache.org/jira/browse/ARROW-2007) - [Python] Sequence converter for float32 not implemented
* [ARROW-2011](https://issues.apache.org/jira/browse/ARROW-2011) - Allow setting the pickler to use in pyarrow serialization.
* [ARROW-2012](https://issues.apache.org/jira/browse/ARROW-2012) - [GLib] Support "make distclean"
* [ARROW-2018](https://issues.apache.org/jira/browse/ARROW-2018) - [C++] Build instruction on macOS and Homebrew is incomplete
* [ARROW-2019](https://issues.apache.org/jira/browse/ARROW-2019) - Control the memory allocated for inner vector in LIST
* [ARROW-2024](https://issues.apache.org/jira/browse/ARROW-2024) - [Python] Remove global SerializationContext variables
* [ARROW-2028](https://issues.apache.org/jira/browse/ARROW-2028) - [Python] extra\_cmake\_args needs to be passed through shlex.split
* [ARROW-2031](https://issues.apache.org/jira/browse/ARROW-2031) - HadoopFileSystem isn't pickleable
* [ARROW-2035](https://issues.apache.org/jira/browse/ARROW-2035) - [C++] Update vendored cpplint.py to a Py3-compatible one
* [ARROW-2036](https://issues.apache.org/jira/browse/ARROW-2036) - NativeFile should support standard IOBase methods
* [ARROW-2042](https://issues.apache.org/jira/browse/ARROW-2042) - [Plasma] Revert API change of plasma::Create to output a MutableBuffer
* [ARROW-2043](https://issues.apache.org/jira/browse/ARROW-2043) - [C++] Change description from OS X to macOS
* [ARROW-2046](https://issues.apache.org/jira/browse/ARROW-2046) - [Python] Add support for PEP519 - pathlib and similar objects
* [ARROW-2048](https://issues.apache.org/jira/browse/ARROW-2048) - [Python/C++] Upate Thrift pin to 0.11
* [ARROW-2050](https://issues.apache.org/jira/browse/ARROW-2050) - Support \`setup.py pytest\` to automatically fetch the test dependencies
* [ARROW-2052](https://issues.apache.org/jira/browse/ARROW-2052) - Unify OwnedRef and ScopedRef
* [ARROW-2053](https://issues.apache.org/jira/browse/ARROW-2053) - [C++] Build instruction is incomplete
* [ARROW-2054](https://issues.apache.org/jira/browse/ARROW-2054) - Compilation warnings
* [ARROW-2064](https://issues.apache.org/jira/browse/ARROW-2064) - [GLib] Add common build problems link to the install section
* [ARROW-2065](https://issues.apache.org/jira/browse/ARROW-2065) - Fix bug in SerializationContext.clone().
* [ARROW-2066](https://issues.apache.org/jira/browse/ARROW-2066) - [Python] Document reading Parquet files from Azure Blob Store
* [ARROW-2068](https://issues.apache.org/jira/browse/ARROW-2068) - [Python] Expose Array's buffers to Python users
* [ARROW-2069](https://issues.apache.org/jira/browse/ARROW-2069) - [Python] Document that Plasma is not (yet) supported on Windows
* [ARROW-2071](https://issues.apache.org/jira/browse/ARROW-2071) - [Python] Reduce runtime of builds in Travis CI
* [ARROW-2071](https://issues.apache.org/jira/browse/ARROW-2071) - [Python] Reduce runtime of builds in Travis CI
* [ARROW-2073](https://issues.apache.org/jira/browse/ARROW-2073) - [Python] Create StructArray from sequence of tuples given a known data type
* [ARROW-2076](https://issues.apache.org/jira/browse/ARROW-2076) - [Python] Display slowest test durations
* [ARROW-2083](https://issues.apache.org/jira/browse/ARROW-2083) - Support skipping builds
* [ARROW-2084](https://issues.apache.org/jira/browse/ARROW-2084) - [C++] Support newer Brotli static library names
* [ARROW-2086](https://issues.apache.org/jira/browse/ARROW-2086) - [Python] Shrink size of arrow\_manylinux1\_x86\_64\_base docker image
* [ARROW-2087](https://issues.apache.org/jira/browse/ARROW-2087) - [Python] Binaries of 3rdparty are not stripped in manylinux1 base image
* [ARROW-2088](https://issues.apache.org/jira/browse/ARROW-2088) - [GLib] Add GArrowNumericArray
* [ARROW-2089](https://issues.apache.org/jira/browse/ARROW-2089) - [GLib] Rename to GARROW\_TYPE\_BOOLEAN for consistency
* [ARROW-2090](https://issues.apache.org/jira/browse/ARROW-2090) - [Python] Add context manager methods to ParquetWriter
* [ARROW-2093](https://issues.apache.org/jira/browse/ARROW-2093) - [Python] Possibly do not test pytorch serialization in Travis CI
* [ARROW-2094](https://issues.apache.org/jira/browse/ARROW-2094) - [Python] Use toolchain libraries and PROTOBUF\_HOME for protocol buffers
* [ARROW-2095](https://issues.apache.org/jira/browse/ARROW-2095) - [C++] Suppress ORC EP build logging by default
* [ARROW-2096](https://issues.apache.org/jira/browse/ARROW-2096) - [C++] Turn off Boost\_DEBUG to trim build output
* [ARROW-2099](https://issues.apache.org/jira/browse/ARROW-2099) - [Python] Support DictionaryArray::FromArrays in Python bindings
* [ARROW-2107](https://issues.apache.org/jira/browse/ARROW-2107) - [GLib] Follow arrow::gpu::CudaIpcMemHandle API change
* [ARROW-2108](https://issues.apache.org/jira/browse/ARROW-2108) - [Python] Update instructions for ASV
* [ARROW-2110](https://issues.apache.org/jira/browse/ARROW-2110) - [Python] Only require pytest-runner on test commands
* [ARROW-2111](https://issues.apache.org/jira/browse/ARROW-2111) - [C++] Linting could be faster
* [ARROW-2114](https://issues.apache.org/jira/browse/ARROW-2114) - [Python] Pull latest docker manylinux1 image
* [ARROW-2117](https://issues.apache.org/jira/browse/ARROW-2117) - [C++] Pin clang to version 5.0
* [ARROW-2118](https://issues.apache.org/jira/browse/ARROW-2118) - [Python] Improve error message when calling parquet.read\_table on an empty file
* [ARROW-2120](https://issues.apache.org/jira/browse/ARROW-2120) - Add possibility to use empty \_MSVC\_STATIC\_LIB\_SUFFIX for Thirdparties
* [ARROW-2121](https://issues.apache.org/jira/browse/ARROW-2121) - [Python] Consider special casing object arrays in pandas serializers.
* [ARROW-2123](https://issues.apache.org/jira/browse/ARROW-2123) - [JS] Upgrade to TS 2.7.1
* [ARROW-2132](https://issues.apache.org/jira/browse/ARROW-2132) - [Doc] Add links / mentions of Plasma store to main README
* [ARROW-2134](https://issues.apache.org/jira/browse/ARROW-2134) - [CI] Make Travis commit inspection more robust
* [ARROW-2137](https://issues.apache.org/jira/browse/ARROW-2137) - [Python] Don't print paths that are ignored when reading Parquet files
* [ARROW-2138](https://issues.apache.org/jira/browse/ARROW-2138) - [C++] Have FatalLog abort instead of exiting
* [ARROW-2142](https://issues.apache.org/jira/browse/ARROW-2142) - [Python] Conversion from Numpy struct array unimplemented
* [ARROW-2143](https://issues.apache.org/jira/browse/ARROW-2143) - [Python] Provide a manylinux1 wheel for cp27m
* [ARROW-2146](https://issues.apache.org/jira/browse/ARROW-2146) - [GLib] Implement Slice for ChunkedArray
* [ARROW-2149](https://issues.apache.org/jira/browse/ARROW-2149) - [Python] reorganize test\_convert\_pandas.py
* [ARROW-2154](https://issues.apache.org/jira/browse/ARROW-2154) - [Python] \_\_eq\_\_ unimplemented on Buffer
* [ARROW-2155](https://issues.apache.org/jira/browse/ARROW-2155) - [Python] pa.frombuffer(bytearray) returns immutable Buffer
* [ARROW-2156](https://issues.apache.org/jira/browse/ARROW-2156) - [CI] Isolate Sphinx dependencies
* [ARROW-2163](https://issues.apache.org/jira/browse/ARROW-2163) - Install apt dependencies separate from built-in Travis commands, retry on flakiness
* [ARROW-2166](https://issues.apache.org/jira/browse/ARROW-2166) - [GLib] Implement Slice for Column
* [ARROW-2168](https://issues.apache.org/jira/browse/ARROW-2168) - [C++] Build toolchain builds with jemalloc
* [ARROW-2169](https://issues.apache.org/jira/browse/ARROW-2169) - [C++] MSVC is complaining about uncaptured variables
* [ARROW-2174](https://issues.apache.org/jira/browse/ARROW-2174) - [JS] Export format and schema enums
* [ARROW-2176](https://issues.apache.org/jira/browse/ARROW-2176) - [C++] Extend DictionaryBuilder to support delta dictionaries
* [ARROW-2177](https://issues.apache.org/jira/browse/ARROW-2177) - [C++] Remove support for specifying negative scale values in DecimalType
* [ARROW-2180](https://issues.apache.org/jira/browse/ARROW-2180) - [C++] Remove APIs deprecated in 0.8.0 release
* [ARROW-2181](https://issues.apache.org/jira/browse/ARROW-2181) - [Python] Add concat\_tables to API reference, add documentation on use
* [ARROW-2184](https://issues.apache.org/jira/browse/ARROW-2184) - [C++] Add static constructor for FileOutputStream returning shared\_ptr to base OutputStream
* [ARROW-2185](https://issues.apache.org/jira/browse/ARROW-2185) - Remove CI directives from squashed commit messages
* [ARROW-2190](https://issues.apache.org/jira/browse/ARROW-2190) - [GLib] Add add/remove field functions for RecordBatch.
* [ARROW-2191](https://issues.apache.org/jira/browse/ARROW-2191) - [C++] Only use specific version of jemalloc
* [ARROW-2197](https://issues.apache.org/jira/browse/ARROW-2197) - Document "undefined symbol" issue and workaround
* [ARROW-2198](https://issues.apache.org/jira/browse/ARROW-2198) - [Python] Docstring for parquet.read\_table is misleading or incorrect
* [ARROW-2199](https://issues.apache.org/jira/browse/ARROW-2199) - [JAVA] Follow up fixes for ARROW-2019. Ensure density driven capacity is never less than 1 and propagate density throughout the vector tree
* [ARROW-2203](https://issues.apache.org/jira/browse/ARROW-2203) - [C++] StderrStream class
* [ARROW-2204](https://issues.apache.org/jira/browse/ARROW-2204) - [C++] Build fails with TLS error on parquet-cpp clone
* [ARROW-2205](https://issues.apache.org/jira/browse/ARROW-2205) - [Python] Option for integer object nulls
* [ARROW-2206](https://issues.apache.org/jira/browse/ARROW-2206) - [JS] Add Perspective as a community project
* [ARROW-2218](https://issues.apache.org/jira/browse/ARROW-2218) - [Python] PythonFile should infer mode when not given
* [ARROW-2231](https://issues.apache.org/jira/browse/ARROW-2231) - [CI] Use clcache on AppVeyor
* [ARROW-2238](https://issues.apache.org/jira/browse/ARROW-2238) - [C++] Detect clcache in cmake configuration
* [ARROW-2239](https://issues.apache.org/jira/browse/ARROW-2239) - [C++] Update build docs for Windows
* [ARROW-2250](https://issues.apache.org/jira/browse/ARROW-2250) - plasma\_store process should cleanup on INT and TERM signals
* [ARROW-2252](https://issues.apache.org/jira/browse/ARROW-2252) - [Python] Create buffer from address, size and base
* [ARROW-2253](https://issues.apache.org/jira/browse/ARROW-2253) - [Python] Support \_\_eq\_\_ on scalar values
* [ARROW-2257](https://issues.apache.org/jira/browse/ARROW-2257) - [C++] Add high-level option to toggle CXX11 ABI
* [ARROW-2261](https://issues.apache.org/jira/browse/ARROW-2261) - [GLib] Can't share the same memory in GArrowBuffer safely
* [ARROW-2262](https://issues.apache.org/jira/browse/ARROW-2262) - [Python] Support slicing on pyarrow.ChunkedArray
* [ARROW-2279](https://issues.apache.org/jira/browse/ARROW-2279) - [Python] Better error message if lib cannot be found
* [ARROW-2282](https://issues.apache.org/jira/browse/ARROW-2282) - [Python] Create StringArray from buffers
* [ARROW-2283](https://issues.apache.org/jira/browse/ARROW-2283) - [C++] Support Arrow C++ installed in /usr detection by pkg-config
* [ARROW-2289](https://issues.apache.org/jira/browse/ARROW-2289) - [GLib] Add  Numeric, Integer and FloatingPoint data types
* [ARROW-2291](https://issues.apache.org/jira/browse/ARROW-2291) - [C++] README missing instructions for libboost-regex-dev
* [ARROW-2292](https://issues.apache.org/jira/browse/ARROW-2292) - [Python] More consistent / intuitive name for pyarrow.frombuffer
* [ARROW-2309](https://issues.apache.org/jira/browse/ARROW-2309) - [C++] Use std::make\_unsigned
* [ARROW-2321](https://issues.apache.org/jira/browse/ARROW-2321) - [C++] Release verification script fails with if CMAKE\_INSTALL\_LIBDIR is not $ARROW\_HOME/lib
* [ARROW-2329](https://issues.apache.org/jira/browse/ARROW-2329) - [Website]: 0.9.0 release update
* [ARROW-2336](https://issues.apache.org/jira/browse/ARROW-2336) - [Website] Blog post for 0.9.0 release
* [ARROW-2768](https://issues.apache.org/jira/browse/ARROW-2768) - [Packaging] Support Ubuntu 18.04
* [ARROW-2783](https://issues.apache.org/jira/browse/ARROW-2783) - Importing conda-forge pyarrow fails


## Bug Fixes

* [ARROW-1345](https://issues.apache.org/jira/browse/ARROW-1345) - [Python] Conversion from nested NumPy arrays fails on integers other than int64, float32
* [ARROW-1589](https://issues.apache.org/jira/browse/ARROW-1589) - [C++] Fuzzing for certain input formats
* [ARROW-1646](https://issues.apache.org/jira/browse/ARROW-1646) - [Python] pyarrow.array cannot handle NumPy scalar types
* [ARROW-1856](https://issues.apache.org/jira/browse/ARROW-1856) - [Python] Auto-detect Parquet ABI version when using PARQUET\_HOME
* [ARROW-1909](https://issues.apache.org/jira/browse/ARROW-1909) - [C++] Bug: Build fails on windows with "-DARROW\_BUILD\_BENCHMARKS=ON"
* [ARROW-1912](https://issues.apache.org/jira/browse/ARROW-1912) - [Website] Add org affiliations to committers.html
* [ARROW-1919](https://issues.apache.org/jira/browse/ARROW-1919) - Plasma hanging if object id is not 20 bytes
* [ARROW-1924](https://issues.apache.org/jira/browse/ARROW-1924) - [Python] Bring back pickle=True option for serialization
* [ARROW-1933](https://issues.apache.org/jira/browse/ARROW-1933) - [GLib] Build failure with --with-arrow-cpp-build-dir and GPU enabled Arrow C++
* [ARROW-1940](https://issues.apache.org/jira/browse/ARROW-1940) - [Python] Extra metadata gets added after multiple conversions between pd.DataFrame and pa.Table
* [ARROW-1941](https://issues.apache.org/jira/browse/ARROW-1941) - Table <–\> DataFrame roundtrip failing
* [ARROW-1943](https://issues.apache.org/jira/browse/ARROW-1943) - Handle setInitialCapacity() for deeply nested lists of lists
* [ARROW-1944](https://issues.apache.org/jira/browse/ARROW-1944) - FindArrow has wrong ARROW\_STATIC\_LIB
* [ARROW-1945](https://issues.apache.org/jira/browse/ARROW-1945) - [C++] Fix doxygen documentation of array.h
* [ARROW-1946](https://issues.apache.org/jira/browse/ARROW-1946) - Add APIs to decimal vector for writing big endian data
* [ARROW-1948](https://issues.apache.org/jira/browse/ARROW-1948) - [Java] ListVector does not handle ipc with all non-null values with none set
* [ARROW-1950](https://issues.apache.org/jira/browse/ARROW-1950) - [Python] pandas\_type in pandas metadata incorrect for List types
* [ARROW-1953](https://issues.apache.org/jira/browse/ARROW-1953) - [JS] JavaScript builds broken on master
* [ARROW-1955](https://issues.apache.org/jira/browse/ARROW-1955) - MSVC generates "attempting to reference a deleted function" during build.
* [ARROW-1958](https://issues.apache.org/jira/browse/ARROW-1958) - [Python] Error in pandas conversion for datetimetz row index
* [ARROW-1961](https://issues.apache.org/jira/browse/ARROW-1961) - [Python] Writing Parquet file with flavor='spark' loses pandas schema metadata
* [ARROW-1966](https://issues.apache.org/jira/browse/ARROW-1966) - [C++] Support JAVA\_HOME paths in HDFS libjvm loading that include the jre directory
* [ARROW-1967](https://issues.apache.org/jira/browse/ARROW-1967) - Python: AssertionError w.r.t Pandas conversion on Parquet files in 0.8.0 dev version
* [ARROW-1971](https://issues.apache.org/jira/browse/ARROW-1971) - [Python] Add pandas serialization to the default
* [ARROW-1972](https://issues.apache.org/jira/browse/ARROW-1972) - Deserialization of buffer objects (and pandas dataframes) segfaults on different processes.
* [ARROW-1973](https://issues.apache.org/jira/browse/ARROW-1973) - [Python] Memory leak when converting Arrow tables with array columns to Pandas dataframes.
* [ARROW-1976](https://issues.apache.org/jira/browse/ARROW-1976) - [Python] Handling unicode pandas columns on parquet.read\_table
* [ARROW-1979](https://issues.apache.org/jira/browse/ARROW-1979) - [JS] JS builds handing in es2015:umd tests
* [ARROW-1980](https://issues.apache.org/jira/browse/ARROW-1980) - [Python] Race condition in \`write\_to\_dataset\`
* [ARROW-1982](https://issues.apache.org/jira/browse/ARROW-1982) - [Python] Return parquet statistics min/max as values instead of strings
* [ARROW-1986](https://issues.apache.org/jira/browse/ARROW-1986) - [Python] HadoopFileSystem is not picklable and cannot currently be used with multiprocessing
* [ARROW-1991](https://issues.apache.org/jira/browse/ARROW-1991) - [GLib] Docker-based documentation build is broken
* [ARROW-1992](https://issues.apache.org/jira/browse/ARROW-1992) - [Python] to\_pandas crashes when using strings\_to\_categoricals on empty string cols on 0.8.0
* [ARROW-1997](https://issues.apache.org/jira/browse/ARROW-1997) - [Python] to\_pandas with strings\_to\_categorical fails
* [ARROW-1998](https://issues.apache.org/jira/browse/ARROW-1998) - [Python] Table.from\_pandas crashes when data frame is empty
* [ARROW-1999](https://issues.apache.org/jira/browse/ARROW-1999) - [Python] from\_numpy\_dtype returns wrong types
* [ARROW-2000](https://issues.apache.org/jira/browse/ARROW-2000) - Deduplicate file descriptors when plasma store replies to get request.
* [ARROW-2002](https://issues.apache.org/jira/browse/ARROW-2002) - use pyarrow download file will raise queue.Full exceptions sometimes
* [ARROW-2003](https://issues.apache.org/jira/browse/ARROW-2003) - [Python] Do not use deprecated kwarg in pandas.core.internals.make\_block
* [ARROW-2005](https://issues.apache.org/jira/browse/ARROW-2005) - [Python] pyflakes warnings on Cython files not failing build
* [ARROW-2008](https://issues.apache.org/jira/browse/ARROW-2008) - [Python] Type inference for int32 NumPy arrays (expecting list<int32\>) returns int64 and then conversion fails
* [ARROW-2010](https://issues.apache.org/jira/browse/ARROW-2010) - [C++] Compiler warnings with CHECKIN warning level in ORC adapter
* [ARROW-2017](https://issues.apache.org/jira/browse/ARROW-2017) - Array initialization with  large (\>2\*\*31-1) uint64 values fails
* [ARROW-2023](https://issues.apache.org/jira/browse/ARROW-2023) - [C++] Test opening IPC stream reader or file reader on an empty InputStream
* [ARROW-2025](https://issues.apache.org/jira/browse/ARROW-2025) - [Python/C++] HDFS Client disconnect closes all open clients
* [ARROW-2029](https://issues.apache.org/jira/browse/ARROW-2029) - [Python] Program crash on \`HdfsFile.tell\` if file is closed
* [ARROW-2032](https://issues.apache.org/jira/browse/ARROW-2032) - [C++] ORC ep installs on each call to ninja build (even if no work to do)
* [ARROW-2033](https://issues.apache.org/jira/browse/ARROW-2033) - pa.array() doesn't work with iterators
* [ARROW-2039](https://issues.apache.org/jira/browse/ARROW-2039) - [Python] pyarrow.Buffer().to\_pybytes() segfaults
* [ARROW-2040](https://issues.apache.org/jira/browse/ARROW-2040) - [Python] Deserialized Numpy array must keep ref to underlying tensor
* [ARROW-2047](https://issues.apache.org/jira/browse/ARROW-2047) - [Python] test\_serialization.py uses a python executable in PATH rather than that used for a test run
* [ARROW-2049](https://issues.apache.org/jira/browse/ARROW-2049) - ARROW-2049: [Python] Use python -m cython to run Cython, instead of CYTHON\_EXECUTABLE
* [ARROW-2062](https://issues.apache.org/jira/browse/ARROW-2062) - [C++] Stalled builds in test\_serialization.py in Travis CI
* [ARROW-2070](https://issues.apache.org/jira/browse/ARROW-2070) - [Python] chdir logic in setup.py buggy
* [ARROW-2072](https://issues.apache.org/jira/browse/ARROW-2072) - [Python] decimal128.byte\_width crashes
* [ARROW-2080](https://issues.apache.org/jira/browse/ARROW-2080) - [Python] Update documentation after ARROW-2024
* [ARROW-2085](https://issues.apache.org/jira/browse/ARROW-2085) - HadoopFileSystem.isdir and .isfile should return False if the path doesn't exist
* [ARROW-2106](https://issues.apache.org/jira/browse/ARROW-2106) - [Python] pyarrow.array can't take a pandas Series of python datetime objects.
* [ARROW-2109](https://issues.apache.org/jira/browse/ARROW-2109) - [C++] Boost 1.66 compilation fails on Windows on linkage stage
* [ARROW-2124](https://issues.apache.org/jira/browse/ARROW-2124) - [Python] ArrowInvalid raised if the first item of a nested list of numpy arrays is empty
* [ARROW-2128](https://issues.apache.org/jira/browse/ARROW-2128) - [Python] Cannot serialize array of empty lists
* [ARROW-2129](https://issues.apache.org/jira/browse/ARROW-2129) - [Python] Segmentation fault on conversion of empty array to Pandas
* [ARROW-2131](https://issues.apache.org/jira/browse/ARROW-2131) - [Python] Serialization test fails on Windows when library has been built in place / not installed
* [ARROW-2133](https://issues.apache.org/jira/browse/ARROW-2133) - [Python] Segmentation fault on conversion of empty nested arrays to Pandas
* [ARROW-2135](https://issues.apache.org/jira/browse/ARROW-2135) - [Python] NaN values silently casted to int64 when passing explicit schema for conversion in Table.from\_pandas
* [ARROW-2139](https://issues.apache.org/jira/browse/ARROW-2139) - [Python] Address Sphinx deprecation warning when building docs
* [ARROW-2145](https://issues.apache.org/jira/browse/ARROW-2145) - [Python] Decimal conversion not working for NaN values
* [ARROW-2150](https://issues.apache.org/jira/browse/ARROW-2150) - [Python] array equality defaults to identity
* [ARROW-2151](https://issues.apache.org/jira/browse/ARROW-2151) - [Python] Error when converting from list of uint64 arrays
* [ARROW-2153](https://issues.apache.org/jira/browse/ARROW-2153) - [C++/Python] Decimal conversion not working for exponential notation
* [ARROW-2157](https://issues.apache.org/jira/browse/ARROW-2157) - [Python] Decimal arrays cannot be constructed from Python lists
* [ARROW-2158](https://issues.apache.org/jira/browse/ARROW-2158) - [Python] Construction of Decimal array with None or np.nan fails
* [ARROW-2160](https://issues.apache.org/jira/browse/ARROW-2160) - [C++/Python] Fix decimal precision inference
* [ARROW-2161](https://issues.apache.org/jira/browse/ARROW-2161) - [Python] Skip test\_cython\_api if ARROW\_HOME isn't defined
* [ARROW-2162](https://issues.apache.org/jira/browse/ARROW-2162) - [Python/C++] Decimal Values with too-high precision are multiplied by 100
* [ARROW-2167](https://issues.apache.org/jira/browse/ARROW-2167) - [C++] Building Orc extensions fails with the default BUILD\_WARNING\_LEVEL=Production
* [ARROW-2170](https://issues.apache.org/jira/browse/ARROW-2170) - [Python] construct\_metadata fails on reading files where no index was preserved
* [ARROW-2171](https://issues.apache.org/jira/browse/ARROW-2171) - [Python] OwnedRef is fragile
* [ARROW-2172](https://issues.apache.org/jira/browse/ARROW-2172) - [Python] Incorrect conversion from Numpy array when stride % itemsize != 0
* [ARROW-2173](https://issues.apache.org/jira/browse/ARROW-2173) - [Python] NumPyBuffer destructor should hold the GIL
* [ARROW-2175](https://issues.apache.org/jira/browse/ARROW-2175) - [Python] arrow\_ep build is triggering during parquet-cpp build in Travis CI
* [ARROW-2178](https://issues.apache.org/jira/browse/ARROW-2178) -  [JS] Fix JS html FileReader example
* [ARROW-2179](https://issues.apache.org/jira/browse/ARROW-2179) - [C++] arrow/util/io-util.h missing from libarrow-dev
* [ARROW-2192](https://issues.apache.org/jira/browse/ARROW-2192) - Commits to master should run all builds in CI matrix
* [ARROW-2194](https://issues.apache.org/jira/browse/ARROW-2194) - [Python] Pandas columns metadata incorrect for empty string columns
* [ARROW-2208](https://issues.apache.org/jira/browse/ARROW-2208) - [Python] install issues with jemalloc
* [ARROW-2209](https://issues.apache.org/jira/browse/ARROW-2209) - [Python] Partition columns are not correctly loaded in schema of ParquetDataset
* [ARROW-2210](https://issues.apache.org/jira/browse/ARROW-2210) - [C++] TestBuffer\_ResizeOOM has a memory leak with jemalloc
* [ARROW-2212](https://issues.apache.org/jira/browse/ARROW-2212) - [C++/Python] Build Protobuf in base manylinux 1 docker image
* [ARROW-2223](https://issues.apache.org/jira/browse/ARROW-2223) - [JS] installing umd release throws an error
* [ARROW-2227](https://issues.apache.org/jira/browse/ARROW-2227) - [Python] Table.from\_pandas does not create chunked\_arrays.
* [ARROW-2228](https://issues.apache.org/jira/browse/ARROW-2228) - [Python] Unsigned int type for arrow Table not supported
* [ARROW-2230](https://issues.apache.org/jira/browse/ARROW-2230) - [Python] JS version number is sometimes picked up
* [ARROW-2232](https://issues.apache.org/jira/browse/ARROW-2232) - [Python] pyarrow.Tensor constructor segfaults
* [ARROW-2234](https://issues.apache.org/jira/browse/ARROW-2234) - [JS] Read timestamp low bits as Uint32s
* [ARROW-2240](https://issues.apache.org/jira/browse/ARROW-2240) - [Python] Array initialization with leading numpy nan fails with exception
* [ARROW-2244](https://issues.apache.org/jira/browse/ARROW-2244) - [C++] Slicing NullArray should not cause the null count on the internal data to be unknown
* [ARROW-2245](https://issues.apache.org/jira/browse/ARROW-2245) - [Python] Revert static linkage of parquet-cpp in manylinux1 wheel
* [ARROW-2246](https://issues.apache.org/jira/browse/ARROW-2246) - [Python] Use namespaced boost in manylinux1 package
* [ARROW-2251](https://issues.apache.org/jira/browse/ARROW-2251) - [GLib] Destroying GArrowBuffer while GArrowTensor that uses the buffer causes a crash
* [ARROW-2254](https://issues.apache.org/jira/browse/ARROW-2254) - [Python] Local in-place dev versions picking up JS tags
* [ARROW-2258](https://issues.apache.org/jira/browse/ARROW-2258) - [C++] Appveyor builds failing on master
* [ARROW-2263](https://issues.apache.org/jira/browse/ARROW-2263) - [Python] test\_cython.py fails if pyarrow is not in import path (e.g. with inplace builds)
* [ARROW-2265](https://issues.apache.org/jira/browse/ARROW-2265) - [Python] Serializing subclasses of np.ndarray returns a np.ndarray.
* [ARROW-2268](https://issues.apache.org/jira/browse/ARROW-2268) - Remove MD5 checksums from release process
* [ARROW-2269](https://issues.apache.org/jira/browse/ARROW-2269) - [Python] Cannot build bdist\_wheel for Python
* [ARROW-2270](https://issues.apache.org/jira/browse/ARROW-2270) - [Python] ForeignBuffer doesn't tie Python object lifetime to C++ buffer lifetime
* [ARROW-2272](https://issues.apache.org/jira/browse/ARROW-2272) - [Python] test\_plasma spams /tmp
* [ARROW-2275](https://issues.apache.org/jira/browse/ARROW-2275) - [C++] Buffer::mutable\_data\_ member uninitialized
* [ARROW-2280](https://issues.apache.org/jira/browse/ARROW-2280) - [Python] pyarrow.Array.buffers should also include the offsets
* [ARROW-2284](https://issues.apache.org/jira/browse/ARROW-2284) - [Python] test\_plasma error on plasma\_store error
* [ARROW-2288](https://issues.apache.org/jira/browse/ARROW-2288) - [Python] slicing logic defective
* [ARROW-2297](https://issues.apache.org/jira/browse/ARROW-2297) - [JS] babel-jest is not listed as a dev dependency
* [ARROW-2304](https://issues.apache.org/jira/browse/ARROW-2304) - [C++] MultipleClients test in io-hdfs-test fails on trunk
* [ARROW-2306](https://issues.apache.org/jira/browse/ARROW-2306) - [Python] HDFS test failures
* [ARROW-2307](https://issues.apache.org/jira/browse/ARROW-2307) - [Python] Unable to read arrow stream containing 0 record batches
* [ARROW-2311](https://issues.apache.org/jira/browse/ARROW-2311) - [Python] Struct array slicing defective
* [ARROW-2312](https://issues.apache.org/jira/browse/ARROW-2312) - [JS] verify-release-candidate-sh must be updated to include JS in integration tests
* [ARROW-2313](https://issues.apache.org/jira/browse/ARROW-2313) - [GLib] Release builds must define NDEBUG
* [ARROW-2316](https://issues.apache.org/jira/browse/ARROW-2316) - [C++] Revert Buffer::mutable\_data member to always inline
* [ARROW-2318](https://issues.apache.org/jira/browse/ARROW-2318) - [C++] TestPlasmaStore.MultipleClientTest is flaky (hangs) in release builds
* [ARROW-2320](https://issues.apache.org/jira/browse/ARROW-2320) - [C++] Vendored Boost build does not build regex library
* [ARROW-2406](https://issues.apache.org/jira/browse/ARROW-2406) - [Python] Segfault when creating PyArrow table from Pandas for empty string column when schema provided



# Apache Arrow 0.8.0 (2017-12-18)

## Bug Fixes

* [ARROW-226](https://issues.apache.org/jira/browse/ARROW-226) - [C++] libhdfs: feedback to help determining cause of failure in opening file path
* [ARROW-641](https://issues.apache.org/jira/browse/ARROW-641) - [C++] Do not build/run io-hdfs-test if ARROW\_HDFS=off
* [ARROW-1282](https://issues.apache.org/jira/browse/ARROW-1282) - Large memory reallocation by Arrow causes hang in jemalloc
* [ARROW-1298](https://issues.apache.org/jira/browse/ARROW-1298) - C++: Add prefix to jemalloc functions to guard against issues when using multiple allocators in the same process
* [ARROW-1341](https://issues.apache.org/jira/browse/ARROW-1341) - [C++] Deprecate arrow::MakeTable in favor of new ctor from ARROW-1334
* [ARROW-1347](https://issues.apache.org/jira/browse/ARROW-1347) - [JAVA] List null type should use consistent name for inner field
* [ARROW-1398](https://issues.apache.org/jira/browse/ARROW-1398) - [Python] No support reading columns of type decimal(19,4)
* [ARROW-1409](https://issues.apache.org/jira/browse/ARROW-1409) - [Format] Use for "page" attribute in Buffer in metadata
* [ARROW-1431](https://issues.apache.org/jira/browse/ARROW-1431) - [Java] JsonFileReader doesn't intialize some vectors approperately
* [ARROW-1436](https://issues.apache.org/jira/browse/ARROW-1436) - PyArrow Timestamps written to Parquet as INT96 appear in Spark as 'bigint'
* [ARROW-1540](https://issues.apache.org/jira/browse/ARROW-1540) - [C++] Fix valgrind warnings in cuda-test if possible
* [ARROW-1541](https://issues.apache.org/jira/browse/ARROW-1541) - [C++] Race condition with arrow\_gpu
* [ARROW-1543](https://issues.apache.org/jira/browse/ARROW-1543) - [C++] row\_wise\_conversion example doesn't correspond to ListBuilder constructor arguments
* [ARROW-1549](https://issues.apache.org/jira/browse/ARROW-1549) - [JS] Integrate auto-generated Arrow test files
* [ARROW-1555](https://issues.apache.org/jira/browse/ARROW-1555) - [Python] write\_to\_dataset on s3
* [ARROW-1584](https://issues.apache.org/jira/browse/ARROW-1584) - [PYTHON] serialize\_pandas on empty dataframe
* [ARROW-1585](https://issues.apache.org/jira/browse/ARROW-1585) - serialize\_pandas round trip fails on integer columns
* [ARROW-1586](https://issues.apache.org/jira/browse/ARROW-1586) - [PYTHON] serialize\_pandas roundtrip loses columns name
* [ARROW-1609](https://issues.apache.org/jira/browse/ARROW-1609) - Plasma: Build fails with Xcode 9.0
* [ARROW-1615](https://issues.apache.org/jira/browse/ARROW-1615) - CXX flags for development more permissive than Travis CI builds
* [ARROW-1617](https://issues.apache.org/jira/browse/ARROW-1617) - [Python] Do not use symlinks in python/cmake\_modules
* [ARROW-1620](https://issues.apache.org/jira/browse/ARROW-1620) - Python: Download Boost in manylinux1 build from bintray
* [ARROW-1622](https://issues.apache.org/jira/browse/ARROW-1622) - [Plasma] Plasma doesn't compile with XCode 9
* [ARROW-1624](https://issues.apache.org/jira/browse/ARROW-1624) - [C++] Follow up fixes / tweaks to compiler warnings for Plasma / LLVM 4.0, add to readme
* [ARROW-1625](https://issues.apache.org/jira/browse/ARROW-1625) - [Serialization] Support OrderedDict properly
* [ARROW-1629](https://issues.apache.org/jira/browse/ARROW-1629) - [C++] Fix problematic code paths identified by infer tool
* [ARROW-1633](https://issues.apache.org/jira/browse/ARROW-1633) - [Python] numpy "unicode" arrays not understood
* [ARROW-1640](https://issues.apache.org/jira/browse/ARROW-1640) - Resolve OpenSSL issues in Travis CI
* [ARROW-1647](https://issues.apache.org/jira/browse/ARROW-1647) - [Plasma] Potential bug when reading/writing messages.
* [ARROW-1653](https://issues.apache.org/jira/browse/ARROW-1653) - [Plasma] Use static cast to avoid compiler warning.
* [ARROW-1655](https://issues.apache.org/jira/browse/ARROW-1655) - [Java] Add Scale and Precision to ValueVectorTypes.tdd for Decimals
* [ARROW-1656](https://issues.apache.org/jira/browse/ARROW-1656) - [C++] Endianness Macro is Incorrect on Windows And Mac
* [ARROW-1657](https://issues.apache.org/jira/browse/ARROW-1657) - [C++] Multithreaded Read Test Failing on Arch Linux
* [ARROW-1658](https://issues.apache.org/jira/browse/ARROW-1658) - [Python] Out of bounds dictionary indices causes segfault after converting to pandas
* [ARROW-1663](https://issues.apache.org/jira/browse/ARROW-1663) - [Java] Follow up on ARROW-1347 and make schema backward compatible
* [ARROW-1670](https://issues.apache.org/jira/browse/ARROW-1670) - [Python] Speed up deserialization code path
* [ARROW-1672](https://issues.apache.org/jira/browse/ARROW-1672) - [Python] Failure to write Feather bytes column
* [ARROW-1673](https://issues.apache.org/jira/browse/ARROW-1673) - [Python] NumPy boolean arrays get converted to uint8 arrays on NdarrayToTensor roundtrip
* [ARROW-1676](https://issues.apache.org/jira/browse/ARROW-1676) - [C++] Correctly truncate oversized validity bitmaps when writing Feather format
* [ARROW-1678](https://issues.apache.org/jira/browse/ARROW-1678) - [Python] Incorrect serialization of numpy.float16
* [ARROW-1680](https://issues.apache.org/jira/browse/ARROW-1680) - [Python] Timestamp unit change not done in from\_pandas() conversion
* [ARROW-1681](https://issues.apache.org/jira/browse/ARROW-1681) - [Python] Error writing with nulls in lists
* [ARROW-1686](https://issues.apache.org/jira/browse/ARROW-1686) - Documentation generation script creates "apidocs" directory under site/java
* [ARROW-1693](https://issues.apache.org/jira/browse/ARROW-1693) - [JS] Error reading dictionary-encoded integration test files
* [ARROW-1694](https://issues.apache.org/jira/browse/ARROW-1694) - [Java] Unclosed VectorSchemaRoot in JsonFileReader\#readDictionaryBatches()
* [ARROW-1695](https://issues.apache.org/jira/browse/ARROW-1695) - [Serialization] Fix reference counting of numpy arrays created in custom serialializer
* [ARROW-1698](https://issues.apache.org/jira/browse/ARROW-1698) - [JS] File reader attempts to load the same dictionary batch more than once
* [ARROW-1704](https://issues.apache.org/jira/browse/ARROW-1704) - [GLib] Go example in test suite is broken
* [ARROW-1708](https://issues.apache.org/jira/browse/ARROW-1708) - [JS] Linter problem breaks master build
* [ARROW-1709](https://issues.apache.org/jira/browse/ARROW-1709) - [C++] Decimal.ToString is incorrect for negative scale
* [ARROW-1711](https://issues.apache.org/jira/browse/ARROW-1711) - [Python] flake8 checks still not failing builds
* [ARROW-1714](https://issues.apache.org/jira/browse/ARROW-1714) - [Python] No named pd.Series name serialized as u'None'
* [ARROW-1720](https://issues.apache.org/jira/browse/ARROW-1720) - [Python] Segmentation fault while trying to access an out-of-bound chunk
* [ARROW-1723](https://issues.apache.org/jira/browse/ARROW-1723) - Windows: \_\_declspec(dllexport) specified when building arrow static library
* [ARROW-1730](https://issues.apache.org/jira/browse/ARROW-1730) - [Python] Incorrect result from pyarrow.array when passing timestamp type
* [ARROW-1732](https://issues.apache.org/jira/browse/ARROW-1732) - [Python] RecordBatch.from\_pandas fails on DataFrame with no columns when preserve\_index=False
* [ARROW-1735](https://issues.apache.org/jira/browse/ARROW-1735) - [C++] Cast kernels cannot write into sliced output array
* [ARROW-1738](https://issues.apache.org/jira/browse/ARROW-1738) - [Python] Wrong datetime conversion when pa.array with unit
* [ARROW-1739](https://issues.apache.org/jira/browse/ARROW-1739) - [Python] Fix usages of assertRaises causing broken build
* [ARROW-1742](https://issues.apache.org/jira/browse/ARROW-1742) - C++: clang-format is not detected correct on OSX anymore
* [ARROW-1743](https://issues.apache.org/jira/browse/ARROW-1743) - [Python] Table to\_pandas fails when index contains categorical column
* [ARROW-1745](https://issues.apache.org/jira/browse/ARROW-1745) - Compilation failure on Mac OS in plasma tests
* [ARROW-1749](https://issues.apache.org/jira/browse/ARROW-1749) - [C++] Handle range of Decimal128 values that require 39 digits to be displayed
* [ARROW-1751](https://issues.apache.org/jira/browse/ARROW-1751) - [Python] Pandas 0.21.0 introduces a breaking API change for MultiIndex construction
* [ARROW-1754](https://issues.apache.org/jira/browse/ARROW-1754) - [Python] Fix buggy Parquet roundtrip when an index name is the same as a column name
* [ARROW-1756](https://issues.apache.org/jira/browse/ARROW-1756) - [Python] Observed int32 overflow in Feather write/read path
* [ARROW-1762](https://issues.apache.org/jira/browse/ARROW-1762) - [C++] unittest failure for language environment
* [ARROW-1764](https://issues.apache.org/jira/browse/ARROW-1764) - [Python] Add -c conda-forge for Windows dev installation instructions
* [ARROW-1766](https://issues.apache.org/jira/browse/ARROW-1766) - [GLib] Fix failing builds on OSX
* [ARROW-1768](https://issues.apache.org/jira/browse/ARROW-1768) - [Python] Fix suppressed exception in ParquetWriter.\_\_del\_\_
* [ARROW-1769](https://issues.apache.org/jira/browse/ARROW-1769) - Python: pyarrow.parquet.write\_to\_dataset creates cyclic references
* [ARROW-1770](https://issues.apache.org/jira/browse/ARROW-1770) - [GLib] Fix GLib compiler warning
* [ARROW-1771](https://issues.apache.org/jira/browse/ARROW-1771) - [C++] ARROW-1749 Breaks Public API test in parquet-cpp
* [ARROW-1776](https://issues.apache.org/jira/browse/ARROW-1776) - [C++[ arrow::gpu::CudaContext::bytes\_allocated() isn't defined
* [ARROW-1778](https://issues.apache.org/jira/browse/ARROW-1778) - [Python] Link parquet-cpp statically, privately in manylinux1 wheels
* [ARROW-1781](https://issues.apache.org/jira/browse/ARROW-1781) - [CI] OSX Builds on Travis-CI time out often
* [ARROW-1788](https://issues.apache.org/jira/browse/ARROW-1788) - Plasma store crashes when trying to abort objects for disconnected client
* [ARROW-1791](https://issues.apache.org/jira/browse/ARROW-1791) - Integration tests generate date[DAY] values outside of reasonable range
* [ARROW-1793](https://issues.apache.org/jira/browse/ARROW-1793) - [Integration] fix a typo for README.md
* [ARROW-1800](https://issues.apache.org/jira/browse/ARROW-1800) - [C++] Fix and simplify random\_decimals
* [ARROW-1805](https://issues.apache.org/jira/browse/ARROW-1805) - [Python] ignore non-parquet files when exploring dataset
* [ARROW-1811](https://issues.apache.org/jira/browse/ARROW-1811) - [C++/Python] Rename all Decimal based APIs to Decimal128
* [ARROW-1812](https://issues.apache.org/jira/browse/ARROW-1812) - Plasma store modifies hash table while iterating during client disconnect
* [ARROW-1813](https://issues.apache.org/jira/browse/ARROW-1813) - Enforce  checkstyle failure in JAVA build and fix all checkstyle
* [ARROW-1821](https://issues.apache.org/jira/browse/ARROW-1821) - Add integration test case to explicitly check for optional validity buffer
* [ARROW-1829](https://issues.apache.org/jira/browse/ARROW-1829) - [Plasma] Clean up eviction policy bookkeeping
* [ARROW-1830](https://issues.apache.org/jira/browse/ARROW-1830) - [Python] Error when loading all the files in a dictionary
* [ARROW-1831](https://issues.apache.org/jira/browse/ARROW-1831) - [Python] Docker-based documentation build does not properly set LD\_LIBRARY\_PATH
* [ARROW-1836](https://issues.apache.org/jira/browse/ARROW-1836) - [C++] Fix C4996 warning from arrow/util/variant.h on MSVC builds
* [ARROW-1839](https://issues.apache.org/jira/browse/ARROW-1839) - [C++/Python] Add Decimal Parquet Read/Write Tests
* [ARROW-1840](https://issues.apache.org/jira/browse/ARROW-1840) - [Website] The installation command failed on Windows10 anaconda environment.
* [ARROW-1845](https://issues.apache.org/jira/browse/ARROW-1845) - [Python] Expose Decimal128Type
* [ARROW-1852](https://issues.apache.org/jira/browse/ARROW-1852) - [Plasma] Make retrieving manager file descriptor const
* [ARROW-1853](https://issues.apache.org/jira/browse/ARROW-1853) - [Plasma] Fix off-by-one error in retry processing
* [ARROW-1863](https://issues.apache.org/jira/browse/ARROW-1863) - [Python] PyObjectStringify could render bytes-like output for more types of objects
* [ARROW-1865](https://issues.apache.org/jira/browse/ARROW-1865) - [C++] Adding a column to an empty Table fails
* [ARROW-1869](https://issues.apache.org/jira/browse/ARROW-1869) - Fix typo in LowCostIdentityHashMap
* [ARROW-1871](https://issues.apache.org/jira/browse/ARROW-1871) - [Python/C++] Appending Python Decimals with different scales requires rescaling
* [ARROW-1873](https://issues.apache.org/jira/browse/ARROW-1873) - [Python] Segmentation fault when loading total 2GB of parquet files
* [ARROW-1877](https://issues.apache.org/jira/browse/ARROW-1877) - Incorrect comparison in JsonStringArrayList.equals
* [ARROW-1879](https://issues.apache.org/jira/browse/ARROW-1879) - [Python] Dask integration tests are not skipped if dask is not installed
* [ARROW-1881](https://issues.apache.org/jira/browse/ARROW-1881) - [Python] setuptools\_scm picks up JS version tags
* [ARROW-1882](https://issues.apache.org/jira/browse/ARROW-1882) - [C++] Reintroduce DictionaryBuilder
* [ARROW-1883](https://issues.apache.org/jira/browse/ARROW-1883) - [Python] BUG: Table.to\_pandas metadata checking fails if columns are not present
* [ARROW-1889](https://issues.apache.org/jira/browse/ARROW-1889) - [Python] --exclude is not available in older git versions
* [ARROW-1890](https://issues.apache.org/jira/browse/ARROW-1890) - [Python] Masking for date32 arrays not working
* [ARROW-1891](https://issues.apache.org/jira/browse/ARROW-1891) - [Python] NaT date32 values are only converted to nulls if from\_pandas is used
* [ARROW-1892](https://issues.apache.org/jira/browse/ARROW-1892) - [Python] Unknown list item type: binary
* [ARROW-1893](https://issues.apache.org/jira/browse/ARROW-1893) - [Python] test\_primitive\_serialization fails on Python 2.7.3
* [ARROW-1895](https://issues.apache.org/jira/browse/ARROW-1895) - [Python] Add field\_name to pandas index metadata
* [ARROW-1897](https://issues.apache.org/jira/browse/ARROW-1897) - [Python] Incorrect numpy\_type for pandas metadata of Categoricals
* [ARROW-1904](https://issues.apache.org/jira/browse/ARROW-1904) - [C++] Deprecate PrimitiveArray::raw\_values
* [ARROW-1906](https://issues.apache.org/jira/browse/ARROW-1906) - [Python] Creating a pyarrow.Array with timestamp of different unit is not casted
* [ARROW-1908](https://issues.apache.org/jira/browse/ARROW-1908) - [Python] Construction of arrow table from pandas DataFrame with duplicate column names crashes
* [ARROW-1910](https://issues.apache.org/jira/browse/ARROW-1910) - CPP README Brewfile link incorrect
* [ARROW-1914](https://issues.apache.org/jira/browse/ARROW-1914) - [C++] make -j may fail to build with -DARROW\_GPU=on
* [ARROW-1915](https://issues.apache.org/jira/browse/ARROW-1915) - [Python] Parquet tests should be optional
* [ARROW-1916](https://issues.apache.org/jira/browse/ARROW-1916) - [Java] Do not exclude java/dev/checkstyle from source releases
* [ARROW-1917](https://issues.apache.org/jira/browse/ARROW-1917) - [GLib] Must set GI\_TYPELIB\_PATH in verify-release-candidate.sh
* [ARROW-1935](https://issues.apache.org/jira/browse/ARROW-1935) - Download page must not link to snapshots / nightly builds
* [ARROW-1936](https://issues.apache.org/jira/browse/ARROW-1936) - Broken links to signatures/hashes etc
* [ARROW-1939](https://issues.apache.org/jira/browse/ARROW-1939) - Correct links in release 0.8 blog post


## New Features and Improvements

* [ARROW-480](https://issues.apache.org/jira/browse/ARROW-480) - [Python] Add accessors for Parquet column statistics
* [ARROW-504](https://issues.apache.org/jira/browse/ARROW-504) - [Python] Add adapter to write pandas.DataFrame in user-selected chunk size to streaming format
* [ARROW-507](https://issues.apache.org/jira/browse/ARROW-507) - [C++/Python] Construct List container from offsets and values subarrays
* [ARROW-541](https://issues.apache.org/jira/browse/ARROW-541) - [JS] Implement JavaScript-compatible implementation
* [ARROW-571](https://issues.apache.org/jira/browse/ARROW-571) - [Python] Add APIs to build Parquet files incrementally from Arrow tables
* [ARROW-587](https://issues.apache.org/jira/browse/ARROW-587) - Add JIRA fix version to merge tool
* [ARROW-609](https://issues.apache.org/jira/browse/ARROW-609) - [C++] Function for casting from days since UNIX epoch to int64 date
* [ARROW-838](https://issues.apache.org/jira/browse/ARROW-838) - [Python] Efficient construction of arrays from non-pandas 1D NumPy arrays
* [ARROW-905](https://issues.apache.org/jira/browse/ARROW-905) - [Docs] Add Dockerfile for reproducible documentation generation
* [ARROW-911](https://issues.apache.org/jira/browse/ARROW-911) - [Python] Expand development.rst with build instructions without conda
* [ARROW-942](https://issues.apache.org/jira/browse/ARROW-942) - Support integration testing on Python 2.7
* [ARROW-950](https://issues.apache.org/jira/browse/ARROW-950) - [Site] Add Google Analytics tag
* [ARROW-972](https://issues.apache.org/jira/browse/ARROW-972) - [Python] Add test cases and basic APIs for UnionArray
* [ARROW-1032](https://issues.apache.org/jira/browse/ARROW-1032) - [JS] Support custom\_metadata
* [ARROW-1047](https://issues.apache.org/jira/browse/ARROW-1047) - [Java] Add generalized stream writer and reader interfaces that are decoupled from IO / message framing
* [ARROW-1047](https://issues.apache.org/jira/browse/ARROW-1047) - [Java] Add generalized stream writer and reader interfaces that are decoupled from IO / message framing
* [ARROW-1087](https://issues.apache.org/jira/browse/ARROW-1087) - [Python] add get\_include to expose directory containing header files
* [ARROW-1114](https://issues.apache.org/jira/browse/ARROW-1114) - [C++] Create Record Batch Builder class as a reusable and efficient way to transpose row-by-row data to columns
* [ARROW-1134](https://issues.apache.org/jira/browse/ARROW-1134) - [C++] Allow C++/CLI projects to build with Arrow​
* [ARROW-1178](https://issues.apache.org/jira/browse/ARROW-1178) - [Python] Create alternative to Table.from\_pandas that yields a list of RecordBatch objects with a given chunk size
* [ARROW-1226](https://issues.apache.org/jira/browse/ARROW-1226) - [C++] Improve / correct doxygen function documentation in arrow::ipc
* [ARROW-1250](https://issues.apache.org/jira/browse/ARROW-1250) - [Python] Define API for user type checking of array types
* [ARROW-1362](https://issues.apache.org/jira/browse/ARROW-1362) - [Integration] Validate vector type layout in IPC messages
* [ARROW-1367](https://issues.apache.org/jira/browse/ARROW-1367) - [Website] Divide CHANGELOG issues by component and add subheaders
* [ARROW-1369](https://issues.apache.org/jira/browse/ARROW-1369) - Support boolean types in the javascript arrow reader library
* [ARROW-1371](https://issues.apache.org/jira/browse/ARROW-1371) - [Website] Add "Powered By" page to the website
* [ARROW-1455](https://issues.apache.org/jira/browse/ARROW-1455) - [Python] Add Dockerfile for validating Dask integration outside of usual CI
* [ARROW-1471](https://issues.apache.org/jira/browse/ARROW-1471) - [JAVA] Document requirements and non/requirements for ValueVector updates
* [ARROW-1472](https://issues.apache.org/jira/browse/ARROW-1472) - [JAVA] Design updated ValueVector Object Hierarchy
* [ARROW-1473](https://issues.apache.org/jira/browse/ARROW-1473) - [JAVA] Create Prototype Code Hierarchy (Implementation Phase 1)
* [ARROW-1474](https://issues.apache.org/jira/browse/ARROW-1474) - [JAVA] ValueVector hierarchy (Implementation Phase 2)
* [ARROW-1476](https://issues.apache.org/jira/browse/ARROW-1476) - [JAVA] Implement final ValueVector updates
* [ARROW-1482](https://issues.apache.org/jira/browse/ARROW-1482) - [C++] Implement casts between date32 and date64
* [ARROW-1483](https://issues.apache.org/jira/browse/ARROW-1483) - [C++] Implement casts between time32 and time64
* [ARROW-1484](https://issues.apache.org/jira/browse/ARROW-1484) - [C++] Implement (safe and unsafe) casts between timestamps and times of different units
* [ARROW-1485](https://issues.apache.org/jira/browse/ARROW-1485) - [C++] Implement union-like data type for accommodating kernel arguments which may be scalars or arrays
* [ARROW-1486](https://issues.apache.org/jira/browse/ARROW-1486) - [C++] Decide if arrow::RecordBatch needs to be copyable
* [ARROW-1487](https://issues.apache.org/jira/browse/ARROW-1487) - [C++] Implement casts from List<A\> to List<B\>, where a cast function is defined from any A to B
* [ARROW-1488](https://issues.apache.org/jira/browse/ARROW-1488) - [C++] Implement ArrayBuilder::Finish in terms of internal::ArrayData
* [ARROW-1498](https://issues.apache.org/jira/browse/ARROW-1498) - [GitHub] Add CONTRIBUTING.md and ISSUE\_TEMPLATE.md
* [ARROW-1503](https://issues.apache.org/jira/browse/ARROW-1503) - [Python] Add serialization callbacks for pandas objects in pyarrow.serialize
* [ARROW-1522](https://issues.apache.org/jira/browse/ARROW-1522) - [C++] Support pyarrow.Buffer as built-in type in pyarrow.serialize
* [ARROW-1523](https://issues.apache.org/jira/browse/ARROW-1523) - [C++] Add helper data struct with methods for reading a validity bitmap possibly having a non-zero offset
* [ARROW-1524](https://issues.apache.org/jira/browse/ARROW-1524) - [C++] More graceful solution for handling non-zero offsets on inputs and outputs in compute library
* [ARROW-1525](https://issues.apache.org/jira/browse/ARROW-1525) - [C++] Change functions in arrow/compare.h to not return Status
* [ARROW-1526](https://issues.apache.org/jira/browse/ARROW-1526) - [Python] Unit tests to exercise code path in PARQUET-1100
* [ARROW-1535](https://issues.apache.org/jira/browse/ARROW-1535) - [Python] Enable sdist source tarballs to build assuming that Arrow C++ libraries are available on the host system
* [ARROW-1538](https://issues.apache.org/jira/browse/ARROW-1538) - [C++] Support Ubuntu 14.04 in .deb packaging automation
* [ARROW-1539](https://issues.apache.org/jira/browse/ARROW-1539) - [C++] Remove functions deprecated as of 0.7.0 and prior releases
* [ARROW-1556](https://issues.apache.org/jira/browse/ARROW-1556) - [C++] Incorporate AssertArraysEqual function from PARQUET-1100 patch
* [ARROW-1559](https://issues.apache.org/jira/browse/ARROW-1559) - [C++] Kernel implementations for "unique" (compute distinct elements of array)
* [ARROW-1573](https://issues.apache.org/jira/browse/ARROW-1573) - [C++] Implement stateful kernel function that uses DictionaryBuilder to compute dictionary indices
* [ARROW-1575](https://issues.apache.org/jira/browse/ARROW-1575) - [Python] Add pyarrow.column factory function
* [ARROW-1576](https://issues.apache.org/jira/browse/ARROW-1576) - [Python] Add utility functions (or a richer type hierachy) for checking whether data type instances are members of various type classes
* [ARROW-1577](https://issues.apache.org/jira/browse/ARROW-1577) - [JS] Package release script for NPM modules
* [ARROW-1588](https://issues.apache.org/jira/browse/ARROW-1588) - [C++/Format] Harden Decimal Format
* [ARROW-1593](https://issues.apache.org/jira/browse/ARROW-1593) - [PYTHON] serialize\_pandas should pass through the preserve\_index keyword
* [ARROW-1594](https://issues.apache.org/jira/browse/ARROW-1594) - [Python] Enable multi-threaded conversions in Table.from\_pandas
* [ARROW-1600](https://issues.apache.org/jira/browse/ARROW-1600) - [C++] Zero-copy Buffer constructor from std::string
* [ARROW-1602](https://issues.apache.org/jira/browse/ARROW-1602) - [C++] Add IsValid/IsNotNull method to arrow::Array
* [ARROW-1603](https://issues.apache.org/jira/browse/ARROW-1603) - [C++] Add BinaryArray method to get a value as a std::string
* [ARROW-1604](https://issues.apache.org/jira/browse/ARROW-1604) - [Python] Support common type aliases in cast(...) and various type= arguments
* [ARROW-1605](https://issues.apache.org/jira/browse/ARROW-1605) - [Python] pyarrow.array should be able to yield smaller integer types without an explicit cast
* [ARROW-1607](https://issues.apache.org/jira/browse/ARROW-1607) - [C++] Implement DictionaryBuilder for Decimals
* [ARROW-1613](https://issues.apache.org/jira/browse/ARROW-1613) - [Java] ArrowReader should not close the input ReadChannel
* [ARROW-1616](https://issues.apache.org/jira/browse/ARROW-1616) - [Python] Add "write" method to RecordBatchStreamWriter that dispatches to write\_table/write\_back as appropriate
* [ARROW-1626](https://issues.apache.org/jira/browse/ARROW-1626) - Add make targets to run the inter-procedural static analysis tool called "infer".
* [ARROW-1627](https://issues.apache.org/jira/browse/ARROW-1627) - [JAVA] Reduce heap usage(Phase 2) - memory footprint in AllocationManager.BufferLedger
* [ARROW-1630](https://issues.apache.org/jira/browse/ARROW-1630) - [Serialization] Support Python datetime objects
* [ARROW-1631](https://issues.apache.org/jira/browse/ARROW-1631) -  [C++] Add GRPC to ThirdpartyToolchain.cmake
* [ARROW-1635](https://issues.apache.org/jira/browse/ARROW-1635) - Add release management guide for PMCs
* [ARROW-1637](https://issues.apache.org/jira/browse/ARROW-1637) - [C++] IPC round-trip for null type
* [ARROW-1641](https://issues.apache.org/jira/browse/ARROW-1641) - [C++] Do not include <mutex\> in public headers
* [ARROW-1648](https://issues.apache.org/jira/browse/ARROW-1648) - C++: Add cast from Dictionary[NullType] to NullType
* [ARROW-1649](https://issues.apache.org/jira/browse/ARROW-1649) - C++: Print number of nulls in PrettyPrint for NullArray
* [ARROW-1651](https://issues.apache.org/jira/browse/ARROW-1651) - [JS] Lazy row accessor in Table
* [ARROW-1652](https://issues.apache.org/jira/browse/ARROW-1652) - [JS] Separate Vector into BatchVector and CompositeVector
* [ARROW-1654](https://issues.apache.org/jira/browse/ARROW-1654) - [Python] pa.DataType cannot be pickled
* [ARROW-1662](https://issues.apache.org/jira/browse/ARROW-1662) - Move OSX Dependency management into brew bundle Brewfiles
* [ARROW-1665](https://issues.apache.org/jira/browse/ARROW-1665) - [Serialization] Support more custom datatypes in the default serialization context
* [ARROW-1666](https://issues.apache.org/jira/browse/ARROW-1666) - [GLib] Enable gtk-doc on Travis CI Mac environment
* [ARROW-1667](https://issues.apache.org/jira/browse/ARROW-1667) - [GLib] Support Meson
* [ARROW-1671](https://issues.apache.org/jira/browse/ARROW-1671) - [C++] Change arrow::MakeArray to not return Status
* [ARROW-1675](https://issues.apache.org/jira/browse/ARROW-1675) - [Python] Use RecordBatch.from\_pandas in FeatherWriter.write
* [ARROW-1677](https://issues.apache.org/jira/browse/ARROW-1677) - [Blog] Add blog post on Ray and Arrow Python serialization
* [ARROW-1679](https://issues.apache.org/jira/browse/ARROW-1679) - [GLib] Add garrow\_record\_batch\_reader\_read\_next()
* [ARROW-1683](https://issues.apache.org/jira/browse/ARROW-1683) - [Python] Restore "TimestampType" to pyarrow namespace
* [ARROW-1684](https://issues.apache.org/jira/browse/ARROW-1684) - [Python] Simplify user API for reading nested Parquet columns
* [ARROW-1685](https://issues.apache.org/jira/browse/ARROW-1685) - [GLib] Add GArrowTableReader
* [ARROW-1687](https://issues.apache.org/jira/browse/ARROW-1687) - [Python] Expose UnionArray to pyarrow
* [ARROW-1689](https://issues.apache.org/jira/browse/ARROW-1689) - [Python] Categorical Indices Should Be Zero-Copy
* [ARROW-1689](https://issues.apache.org/jira/browse/ARROW-1689) - [Python] Categorical Indices Should Be Zero-Copy
* [ARROW-1690](https://issues.apache.org/jira/browse/ARROW-1690) - [GLib] Add garrow\_array\_is\_valid()
* [ARROW-1691](https://issues.apache.org/jira/browse/ARROW-1691) - [Java] Conform Java Decimal type implementation to format decisions in ARROW-1588
* [ARROW-1697](https://issues.apache.org/jira/browse/ARROW-1697) - [GitHub] Add ISSUE\_TEMPLATE.md
* [ARROW-1701](https://issues.apache.org/jira/browse/ARROW-1701) - [Serialization] Support zero copy PyTorch Tensor serialization
* [ARROW-1702](https://issues.apache.org/jira/browse/ARROW-1702) - Update jemalloc in manylinux1 build
* [ARROW-1703](https://issues.apache.org/jira/browse/ARROW-1703) - [C++] Vendor exact version of jemalloc we depend on
* [ARROW-1707](https://issues.apache.org/jira/browse/ARROW-1707) - Update dev README after movement to GitBox
* [ARROW-1710](https://issues.apache.org/jira/browse/ARROW-1710) - [Java] Remove non-nullable vectors in new vector class hierarchy
* [ARROW-1716](https://issues.apache.org/jira/browse/ARROW-1716) - [Format/JSON] Use string integer value for Decimals in JSON
* [ARROW-1717](https://issues.apache.org/jira/browse/ARROW-1717) - [Java] Remove public static helper method in vector classes for JSONReader/Writer
* [ARROW-1718](https://issues.apache.org/jira/browse/ARROW-1718) - [Python] Implement casts from timestamp to date32/date64 and support in Array.from\_pandas
* [ARROW-1719](https://issues.apache.org/jira/browse/ARROW-1719) - [Java] Remove accessor/mutator
* [ARROW-1721](https://issues.apache.org/jira/browse/ARROW-1721) - [Python] Support null mask in places where it isn't supported in numpy\_to\_arrow.cc
* [ARROW-1724](https://issues.apache.org/jira/browse/ARROW-1724) - [Packaging] Support Ubuntu 17.10
* [ARROW-1725](https://issues.apache.org/jira/browse/ARROW-1725) - [Packaging] Upload .deb for Ubuntu 17.10
* [ARROW-1726](https://issues.apache.org/jira/browse/ARROW-1726) - [GLib] Add setup description to verify C GLib build
* [ARROW-1727](https://issues.apache.org/jira/browse/ARROW-1727) - [Format] Expand Arrow streaming format to permit new dictionaries and deltas / additions to existing dictionaries
* [ARROW-1728](https://issues.apache.org/jira/browse/ARROW-1728) - [C++] Run clang-format checks in Travis CI
* [ARROW-1734](https://issues.apache.org/jira/browse/ARROW-1734) - C++/Python: Add cast function on Column-level
* [ARROW-1736](https://issues.apache.org/jira/browse/ARROW-1736) - [GLib] Add GArrowCastOptions:allow-time-truncate
* [ARROW-1737](https://issues.apache.org/jira/browse/ARROW-1737) - [GLib] Use G\_DECLARE\_DERIVABLE\_TYPE
* [ARROW-1740](https://issues.apache.org/jira/browse/ARROW-1740) - C++: Kernel to get unique values of an Array/Column
* [ARROW-1746](https://issues.apache.org/jira/browse/ARROW-1746) - [Python] Add build dependencies for Arch Linux
* [ARROW-1747](https://issues.apache.org/jira/browse/ARROW-1747) - [C++] Don't export symbols of statically linked libraries
* [ARROW-1748](https://issues.apache.org/jira/browse/ARROW-1748) - [GLib] Add GArrowRecordBatchBuilder
* [ARROW-1750](https://issues.apache.org/jira/browse/ARROW-1750) - [C++] Remove the need for arrow/util/random.h
* [ARROW-1752](https://issues.apache.org/jira/browse/ARROW-1752) - [Packaging] Add GPU packages for Debian and Ubuntu
* [ARROW-1753](https://issues.apache.org/jira/browse/ARROW-1753) - [Python] Provide for matching subclasses with register\_type in serialization context
* [ARROW-1755](https://issues.apache.org/jira/browse/ARROW-1755) - [C++] Add build options for MSVC to use static runtime libraries
* [ARROW-1758](https://issues.apache.org/jira/browse/ARROW-1758) - [Python] Remove pickle=True option for object serialization
* [ARROW-1759](https://issues.apache.org/jira/browse/ARROW-1759) - [Python] Add function / property to get implied Arrow schema from Parquet file
* [ARROW-1763](https://issues.apache.org/jira/browse/ARROW-1763) - [Python] DataType should be hashable
* [ARROW-1765](https://issues.apache.org/jira/browse/ARROW-1765) - [Doc] Use dependencies from conda in C++ docker build
* [ARROW-1767](https://issues.apache.org/jira/browse/ARROW-1767) - [C++] Support file reads and writes over 2GB on Windows
* [ARROW-1772](https://issues.apache.org/jira/browse/ARROW-1772) - [C++] Add public-api-test module in style of parquet-cpp
* [ARROW-1773](https://issues.apache.org/jira/browse/ARROW-1773) - [C++] Add casts from date/time types to compatible signed integers
* [ARROW-1775](https://issues.apache.org/jira/browse/ARROW-1775) - Ability to abort created but unsealed Plasma objects
* [ARROW-1777](https://issues.apache.org/jira/browse/ARROW-1777) - [C++] Add static ctor ArrayData::Make for nicer syntax in places
* [ARROW-1779](https://issues.apache.org/jira/browse/ARROW-1779) - [Java] Integration test breaks without zeroing out validity vectors
* [ARROW-1782](https://issues.apache.org/jira/browse/ARROW-1782) - [Python] Expose compressors as pyarrow.compress, pyarrow.decompress
* [ARROW-1783](https://issues.apache.org/jira/browse/ARROW-1783) - [Python] Convert SerializedPyObject to/from sequence of component buffers with minimal memory allocation / copying
* [ARROW-1784](https://issues.apache.org/jira/browse/ARROW-1784) - [Python] Read and write pandas.DataFrame in pyarrow.serialize by decomposing the BlockManager rather than coercing to Arrow format
* [ARROW-1785](https://issues.apache.org/jira/browse/ARROW-1785) - [Format/C++/Java] Remove VectorLayout metadata from Flatbuffers metadata
* [ARROW-1787](https://issues.apache.org/jira/browse/ARROW-1787) - [Python] Support reading parquet files into DataFrames in a backward compatible way
* [ARROW-1794](https://issues.apache.org/jira/browse/ARROW-1794) - [C++/Python] Rename DecimalArray to Decimal128Array
* [ARROW-1795](https://issues.apache.org/jira/browse/ARROW-1795) - [Plasma C++] change evict policy
* [ARROW-1801](https://issues.apache.org/jira/browse/ARROW-1801) - [Docs] Update install instructions to use red-data-tools repos
* [ARROW-1802](https://issues.apache.org/jira/browse/ARROW-1802) - [GLib] Add Arrow GPU support
* [ARROW-1806](https://issues.apache.org/jira/browse/ARROW-1806) - [GLib] Add garrow\_record\_batch\_writer\_write\_table()
* [ARROW-1808](https://issues.apache.org/jira/browse/ARROW-1808) - [C++] Make RecordBatch interface virtual to permit record batches that lazy-materialize columns
* [ARROW-1809](https://issues.apache.org/jira/browse/ARROW-1809) - [GLib] Use .xml instead of .sgml for GTK-Doc main file
* [ARROW-1810](https://issues.apache.org/jira/browse/ARROW-1810) - [Plasma] Remove test shell scripts
* [ARROW-1816](https://issues.apache.org/jira/browse/ARROW-1816) - [Java] Resolve new vector classes structure for timestamp, date and maybe interval
* [ARROW-1817](https://issues.apache.org/jira/browse/ARROW-1817) - Configure JsonFileReader to read NaN for floats
* [ARROW-1818](https://issues.apache.org/jira/browse/ARROW-1818) - Examine Java Dependencies
* [ARROW-1819](https://issues.apache.org/jira/browse/ARROW-1819) - [Java] Remove legacy vector classes
* [ARROW-1820](https://issues.apache.org/jira/browse/ARROW-1820) - [C++] Create arrow\_compute shared library subcomponent
* [ARROW-1826](https://issues.apache.org/jira/browse/ARROW-1826) - [JAVA] Avoid branching at cell level (copyFrom)
* [ARROW-1827](https://issues.apache.org/jira/browse/ARROW-1827) - [Java] Add checkstyle config file and header file
* [ARROW-1828](https://issues.apache.org/jira/browse/ARROW-1828) - [C++] Implement hash kernel specialization for BooleanType
* [ARROW-1834](https://issues.apache.org/jira/browse/ARROW-1834) - [Doc] Build documentation in separate build folders
* [ARROW-1838](https://issues.apache.org/jira/browse/ARROW-1838) - [C++] Use compute::Datum uniformly for input argument to kernels
* [ARROW-1841](https://issues.apache.org/jira/browse/ARROW-1841) - [JS] Update text-encoding-utf-8 and tslib for node ESModules support
* [ARROW-1844](https://issues.apache.org/jira/browse/ARROW-1844) - [C++] Basic benchmark suite for hash kernels
* [ARROW-1849](https://issues.apache.org/jira/browse/ARROW-1849) - [GLib] Add input checks to GArrowRecordBatch
* [ARROW-1850](https://issues.apache.org/jira/browse/ARROW-1850) - [C++] Use const void\* in Writable::Write instead of const uint8\_t\*
* [ARROW-1854](https://issues.apache.org/jira/browse/ARROW-1854) - [Python] Improve performance of serializing object dtype ndarrays
* [ARROW-1855](https://issues.apache.org/jira/browse/ARROW-1855) - [GLib] Add workaround for build failure on macOS
* [ARROW-1857](https://issues.apache.org/jira/browse/ARROW-1857) - [Python] Add switch for boost linkage with static parquet in wheels
* [ARROW-1859](https://issues.apache.org/jira/browse/ARROW-1859) - [GLib] Add GArrowDictionaryDataType
* [ARROW-1862](https://issues.apache.org/jira/browse/ARROW-1862) - [GLib] Add GArrowDictionaryArray
* [ARROW-1864](https://issues.apache.org/jira/browse/ARROW-1864) - [Java] Upgrade Netty to 4.1.x
* [ARROW-1866](https://issues.apache.org/jira/browse/ARROW-1866) - [Java] Combine MapVector and NonNullableMapVector Classes
* [ARROW-1867](https://issues.apache.org/jira/browse/ARROW-1867) - [Java] Add BitVector APIs from old vector class
* [ARROW-1874](https://issues.apache.org/jira/browse/ARROW-1874) - [GLib] Add garrow\_array\_unique()
* [ARROW-1878](https://issues.apache.org/jira/browse/ARROW-1878) - [GLib] Add garrow\_array\_dictionary\_encode()
* [ARROW-1884](https://issues.apache.org/jira/browse/ARROW-1884) - [C++] Make JsonReader/JsonWriter classes internal APIs
* [ARROW-1885](https://issues.apache.org/jira/browse/ARROW-1885) - [Java] Restore previous MapVector class names
* [ARROW-1901](https://issues.apache.org/jira/browse/ARROW-1901) - [Python] Support recursive mkdir for DaskFilesystem
* [ARROW-1902](https://issues.apache.org/jira/browse/ARROW-1902) - [Python] Remove mkdir race condition from write\_to\_dataset
* [ARROW-1905](https://issues.apache.org/jira/browse/ARROW-1905) - [Python] Add more functions for checking exact types in pyarrow.types
* [ARROW-1911](https://issues.apache.org/jira/browse/ARROW-1911) - Add Graphistry to Arrow JS proof points
* [ARROW-1922](https://issues.apache.org/jira/browse/ARROW-1922) - Blog post on recent improvements/changes in JAVA Vectors
* [ARROW-1932](https://issues.apache.org/jira/browse/ARROW-1932) - [Website] Update site for 0.8.0
* [ARROW-1934](https://issues.apache.org/jira/browse/ARROW-1934) - [Website] Blog post summarizing highlights of 0.8.0 release



# Apache Arrow 0.7.1 (2017-10-01)

## New Features and Improvements

* [ARROW-559](https://issues.apache.org/jira/browse/ARROW-559) - Script to easily verify release in all languages
* [ARROW-1464](https://issues.apache.org/jira/browse/ARROW-1464) - [GLib] Documentation for troubleshooting of build errors
* [ARROW-1537](https://issues.apache.org/jira/browse/ARROW-1537) - [C++] Support building with full path install\_name on macOS
* [ARROW-1546](https://issues.apache.org/jira/browse/ARROW-1546) - [GLib] Support GLib 2.40 again
* [ARROW-1548](https://issues.apache.org/jira/browse/ARROW-1548) - [GLib] Support build append in builder
* [ARROW-1578](https://issues.apache.org/jira/browse/ARROW-1578) - [C++/Python] Run lint checks in Travis CI to fail for linting issues as early as possible
* [ARROW-1592](https://issues.apache.org/jira/browse/ARROW-1592) - [GLib] Add GArrowUIntArrayBuilder
* [ARROW-1608](https://issues.apache.org/jira/browse/ARROW-1608) - Support Release verification script on macOS
* [ARROW-1612](https://issues.apache.org/jira/browse/ARROW-1612) - [GLib] add how to install for mac os to README
* [ARROW-1618](https://issues.apache.org/jira/browse/ARROW-1618) - [JAVA] Reduce Heap Usage(Phase 1): move release listener logic to Allocation Manager
* [ARROW-1634](https://issues.apache.org/jira/browse/ARROW-1634) - [Website] Updates for 0.7.1 release


## Bug Fixes

* [ARROW-1497](https://issues.apache.org/jira/browse/ARROW-1497) - [Java] JsonFileReader doesn't set value count for some vectors
* [ARROW-1500](https://issues.apache.org/jira/browse/ARROW-1500) - [C++] Result of ftruncate ignored in MemoryMappedFile::Create
* [ARROW-1529](https://issues.apache.org/jira/browse/ARROW-1529) - [GLib] Fix failure on macOS on Travis CI
* [ARROW-1533](https://issues.apache.org/jira/browse/ARROW-1533) - [JAVA] realloc should consider the existing buffer capacity for computing target memory requirement
* [ARROW-1536](https://issues.apache.org/jira/browse/ARROW-1536) - [C++] Do not transitively depend on libboost\_system
* [ARROW-1542](https://issues.apache.org/jira/browse/ARROW-1542) - [C++] Windows release verification script should not modify conda environment
* [ARROW-1544](https://issues.apache.org/jira/browse/ARROW-1544) - [JS] Export Vector type definitions
* [ARROW-1545](https://issues.apache.org/jira/browse/ARROW-1545) - Int64Builder should not need int64() as arg
* [ARROW-1547](https://issues.apache.org/jira/browse/ARROW-1547) - [JAVA] Fix 8x memory over-allocation in BitVector
* [ARROW-1550](https://issues.apache.org/jira/browse/ARROW-1550) - [Python] Fix flaky test on Windows
* [ARROW-1550](https://issues.apache.org/jira/browse/ARROW-1550) - [Python] Fix flaky test on Windows
* [ARROW-1553](https://issues.apache.org/jira/browse/ARROW-1553) - [JAVA] Implement setInitialCapacity for MapWriter and pass on this capacity during lazy creation of child vectors
* [ARROW-1554](https://issues.apache.org/jira/browse/ARROW-1554) - [Python] Document that pip wheels depend on MSVC14 runtime
* [ARROW-1557](https://issues.apache.org/jira/browse/ARROW-1557) - [PYTHON] pyarrow.Table.from\_arrays doesn't validate names length
* [ARROW-1590](https://issues.apache.org/jira/browse/ARROW-1590) - Flow TS Table method generics
* [ARROW-1591](https://issues.apache.org/jira/browse/ARROW-1591) - C++: Xcode 9 is not correctly detected
* [ARROW-1595](https://issues.apache.org/jira/browse/ARROW-1595) - [Python] Fix package dependency issues causing build failures
* [ARROW-1598](https://issues.apache.org/jira/browse/ARROW-1598) - [C++/Tutorials] MIsmatch code comment and actual code about Object ID
* [ARROW-1601](https://issues.apache.org/jira/browse/ARROW-1601) - [C++] READ\_NEXT\_BITSET reads one byte past the last byte on last iteration
* [ARROW-1606](https://issues.apache.org/jira/browse/ARROW-1606) - Python: Windows wheels don't include .lib files.
* [ARROW-1610](https://issues.apache.org/jira/browse/ARROW-1610) - C++/Python: Only call python-prefix if the default PYTHON\_LIBRARY is not present
* [ARROW-1611](https://issues.apache.org/jira/browse/ARROW-1611) - Crash in BitmapReader when length is zero
* [ARROW-1619](https://issues.apache.org/jira/browse/ARROW-1619) - [Java] Correctly set "lastSet" for variable vectors in JsonReader



# Apache Arrow 0.7.0 (2017-09-17)

## Bug Fixes

* [ARROW-12](https://issues.apache.org/jira/browse/ARROW-12) - Get Github activity mirrored to JIRA
* [ARROW-248](https://issues.apache.org/jira/browse/ARROW-248) - UnionVector.close() should call clear()
* [ARROW-269](https://issues.apache.org/jira/browse/ARROW-269) - UnionVector getBuffers method does not include typevector
* [ARROW-407](https://issues.apache.org/jira/browse/ARROW-407) - BitVector.copyFromSafe() should re-allocate if necessary instead of returning false
* [ARROW-801](https://issues.apache.org/jira/browse/ARROW-801) - [JAVA] Provide direct access to underlying buffer memory addresses in consistent way without generating garbage or large amount indirections
* [ARROW-1302](https://issues.apache.org/jira/browse/ARROW-1302) - C++: ${MAKE} variable not set sometimes on older MacOS installations
* [ARROW-1332](https://issues.apache.org/jira/browse/ARROW-1332) - [Packaging] Building Windows wheels in Apache repos
* [ARROW-1354](https://issues.apache.org/jira/browse/ARROW-1354) - [Python] Segfault in Table.from\_pandas with Mixed-Type Categories
* [ARROW-1357](https://issues.apache.org/jira/browse/ARROW-1357) - [Python] Data corruption in reading multi-file parquet dataset
* [ARROW-1363](https://issues.apache.org/jira/browse/ARROW-1363) - [C++] IPC writer sends buffer layout for dictionary rather than indices
* [ARROW-1365](https://issues.apache.org/jira/browse/ARROW-1365) - [Python] Remove usage of removed jemalloc\_memory\_pool in Python API docs
* [ARROW-1373](https://issues.apache.org/jira/browse/ARROW-1373) - [Java] Implement get<type\>Buffer() methods at the ValueVector interface
* [ARROW-1375](https://issues.apache.org/jira/browse/ARROW-1375) - [C++] Visual Studio 2017 Appveyor builds failing
* [ARROW-1378](https://issues.apache.org/jira/browse/ARROW-1378) - [Python] whl is not a supported wheel on this platform on Debian/Jessie
* [ARROW-1379](https://issues.apache.org/jira/browse/ARROW-1379) - [Java] maven dependency issues - both unused and undeclared
* [ARROW-1390](https://issues.apache.org/jira/browse/ARROW-1390) - [Python] Extend tests for python serialization
* [ARROW-1407](https://issues.apache.org/jira/browse/ARROW-1407) - Dictionaries can only hold a maximum of 4096 indices
* [ARROW-1411](https://issues.apache.org/jira/browse/ARROW-1411) - [Python] Booleans in Float Columns cause Segfault
* [ARROW-1414](https://issues.apache.org/jira/browse/ARROW-1414) - [GLib] Cast after status check
* [ARROW-1421](https://issues.apache.org/jira/browse/ARROW-1421) - [Python] pyarrow.serialize cannot serialize a Python dict input
* [ARROW-1426](https://issues.apache.org/jira/browse/ARROW-1426) - [Website] The title element of the top page is empty
* [ARROW-1429](https://issues.apache.org/jira/browse/ARROW-1429) - [Python] Error loading parquet file with \_metadata from HDFS
* [ARROW-1430](https://issues.apache.org/jira/browse/ARROW-1430) - [Python] flake8 warnings are not failing CI builds
* [ARROW-1434](https://issues.apache.org/jira/browse/ARROW-1434) - [C++/Python] pyarrow.Array.from\_pandas does not support datetime64[D] arrays
* [ARROW-1435](https://issues.apache.org/jira/browse/ARROW-1435) - [Python] PyArrow not propagating timezone information from Parquet to Python
* [ARROW-1437](https://issues.apache.org/jira/browse/ARROW-1437) - [Python] pa.Array.from\_pandas segfaults when given a mixed-type array
* [ARROW-1439](https://issues.apache.org/jira/browse/ARROW-1439) - [Packaging] Automate updating RPM in RPM build
* [ARROW-1443](https://issues.apache.org/jira/browse/ARROW-1443) - [Java] Bug on ArrowBuf.setBytes with unsliced ByteBuffers
* [ARROW-1444](https://issues.apache.org/jira/browse/ARROW-1444) - [JAVA] BitVector.splitAndTransfer copies last byte incorrectly
* [ARROW-1446](https://issues.apache.org/jira/browse/ARROW-1446) - Python: Writing more than 2^31 rows from pandas dataframe causes row count overflow error
* [ARROW-1450](https://issues.apache.org/jira/browse/ARROW-1450) - [Python] Raise proper error if custom serialization handler fails
* [ARROW-1452](https://issues.apache.org/jira/browse/ARROW-1452) - [C++] Make UNUSED macro name more unique so it does not conflict with thirdparty projects
* [ARROW-1452](https://issues.apache.org/jira/browse/ARROW-1452) - [C++] Make UNUSED macro name more unique so it does not conflict with thirdparty projects
* [ARROW-1453](https://issues.apache.org/jira/browse/ARROW-1453) - [Python] Implement WriteTensor for non-contiguous tensors
* [ARROW-1457](https://issues.apache.org/jira/browse/ARROW-1457) - [C++] Optimize strided WriteTensor
* [ARROW-1458](https://issues.apache.org/jira/browse/ARROW-1458) - [Python] Document that HadoopFileSystem.mkdir with create\_parents=False has no effect
* [ARROW-1459](https://issues.apache.org/jira/browse/ARROW-1459) - [Python] PyArrow fails to load partitioned parquet files with non-primitive types
* [ARROW-1461](https://issues.apache.org/jira/browse/ARROW-1461) - [C++] Disable builds using LLVM apt packages temporarily
* [ARROW-1461](https://issues.apache.org/jira/browse/ARROW-1461) - [C++] Disable builds using LLVM apt packages temporarily
* [ARROW-1467](https://issues.apache.org/jira/browse/ARROW-1467) - [JAVA]: Fix reset() and allocateNew() in Nullable Value Vectors template
* [ARROW-1469](https://issues.apache.org/jira/browse/ARROW-1469) - Segfault when serialize Pandas series with mixed object type
* [ARROW-1490](https://issues.apache.org/jira/browse/ARROW-1490) - [Java] Allow Travis CI failures for JDK9 for now
* [ARROW-1493](https://issues.apache.org/jira/browse/ARROW-1493) - [C++] Flush the output stream at the end of each PrettyPrint function
* [ARROW-1495](https://issues.apache.org/jira/browse/ARROW-1495) - [C++] Store shared\_ptr to boxed arrays in RecordBatch
* [ARROW-1507](https://issues.apache.org/jira/browse/ARROW-1507) - [C++] arrow/compute/api.h can't be used without arrow/array.h
* [ARROW-1512](https://issues.apache.org/jira/browse/ARROW-1512) - [Docs] NumericArray has no member named 'raw\_data'
* [ARROW-1514](https://issues.apache.org/jira/browse/ARROW-1514) - [C++] Fix a typo in document
* [ARROW-1527](https://issues.apache.org/jira/browse/ARROW-1527) - Fix Travis JDK9 build
* [ARROW-1531](https://issues.apache.org/jira/browse/ARROW-1531) - [C++] Return ToBytes by value from Decimal128
* [ARROW-1532](https://issues.apache.org/jira/browse/ARROW-1532) - [Python] Referencing an Empty Schema causes a SegFault


## New Features and Improvements

* [ARROW-34](https://issues.apache.org/jira/browse/ARROW-34) - C++: establish a basic function evaluation model
* [ARROW-229](https://issues.apache.org/jira/browse/ARROW-229) - [C++] Implement safe casts for primitive types
* [ARROW-592](https://issues.apache.org/jira/browse/ARROW-592) - [C++] Provide .deb and .rpm packages
* [ARROW-594](https://issues.apache.org/jira/browse/ARROW-594) - [Python] Provide interface to write pyarrow.Table to a stream
* [ARROW-695](https://issues.apache.org/jira/browse/ARROW-695) - Integration tests for Decimal types
* [ARROW-696](https://issues.apache.org/jira/browse/ARROW-696) - [C++] Add JSON read/write support for decimals for integration tests
* [ARROW-759](https://issues.apache.org/jira/browse/ARROW-759) - [Python] Implement a transient list serialization function that can handle a mix of scalars, lists, ndarrays, dicts
* [ARROW-786](https://issues.apache.org/jira/browse/ARROW-786) - [Format] In-memory format for 128-bit Decimals, handling of sign bit
* [ARROW-837](https://issues.apache.org/jira/browse/ARROW-837) - [Python] Expose buffer allocation, FixedSizeBufferWriter
* [ARROW-941](https://issues.apache.org/jira/browse/ARROW-941) - [Docs] Improve "cold start" integration testing instructions
* [ARROW-989](https://issues.apache.org/jira/browse/ARROW-989) - [Python] Write pyarrow.Table to FileWriter or StreamWriter
* [ARROW-1156](https://issues.apache.org/jira/browse/ARROW-1156) - [Python] pyarrow.Array.from\_pandas should take a type parameter
* [ARROW-1238](https://issues.apache.org/jira/browse/ARROW-1238) - [Java] Add JSON read/write support for decimals for integration tests
* [ARROW-1286](https://issues.apache.org/jira/browse/ARROW-1286) - PYTHON: support Categorical serialization to/from parquet
* [ARROW-1307](https://issues.apache.org/jira/browse/ARROW-1307) - [Python] Add pandas serialization section + Feather API to Sphinx docs
* [ARROW-1317](https://issues.apache.org/jira/browse/ARROW-1317) - [Python] Add function to set Hadoop CLASSPATH
* [ARROW-1331](https://issues.apache.org/jira/browse/ARROW-1331) - [Java] Refactor tests
* [ARROW-1331](https://issues.apache.org/jira/browse/ARROW-1331) - [Java] Refactor tests
* [ARROW-1339](https://issues.apache.org/jira/browse/ARROW-1339) - [C++] Use boost::filesystem for handling of platform-specific file path encodings
* [ARROW-1344](https://issues.apache.org/jira/browse/ARROW-1344) - [C++] Calling BufferOutputStream::Write after calling Finish crashes
* [ARROW-1348](https://issues.apache.org/jira/browse/ARROW-1348) - [C++/Python] Add release verification script for Windows
* [ARROW-1351](https://issues.apache.org/jira/browse/ARROW-1351) - Automate updating CHANGELOG.md as part of release scripts
* [ARROW-1352](https://issues.apache.org/jira/browse/ARROW-1352) - [Integration] Improve print formatting for producer, consumer line
* [ARROW-1355](https://issues.apache.org/jira/browse/ARROW-1355) - Make arrow buildable with java9
* [ARROW-1356](https://issues.apache.org/jira/browse/ARROW-1356) - [Website] Add new committers
* [ARROW-1358](https://issues.apache.org/jira/browse/ARROW-1358) - Update source release scripts to account for new SHA checksum policy
* [ARROW-1359](https://issues.apache.org/jira/browse/ARROW-1359) - [Python] Add Parquet writer option to normalize field names for use in Spark
* [ARROW-1364](https://issues.apache.org/jira/browse/ARROW-1364) - [C++] IPC reader and writer specialized for GPU device memory
* [ARROW-1366](https://issues.apache.org/jira/browse/ARROW-1366) - [Python] Add instructions for starting the Plasma store when installing pyarrow from wheels
* [ARROW-1372](https://issues.apache.org/jira/browse/ARROW-1372) - [Plasma] Support for storing data in huge pages
* [ARROW-1376](https://issues.apache.org/jira/browse/ARROW-1376) - [C++] RecordBatchStreamReader::Open API is inconsistent with writer
* [ARROW-1377](https://issues.apache.org/jira/browse/ARROW-1377) - [Python] Add function to assist with benchmarking Parquet scan performance
* [ARROW-1381](https://issues.apache.org/jira/browse/ARROW-1381) - [Python] Improve performance of SerializedPyObject.to\_buffer
* [ARROW-1383](https://issues.apache.org/jira/browse/ARROW-1383) - [C++] Support std::vector<bool\> in builder vector appends
* [ARROW-1384](https://issues.apache.org/jira/browse/ARROW-1384) - [C++] Add convenience function for serializing a record batch to an IPC message
* [ARROW-1386](https://issues.apache.org/jira/browse/ARROW-1386) - [C++] Unpin CMake version in MSVC build toolchain
* [ARROW-1387](https://issues.apache.org/jira/browse/ARROW-1387) - [C++] Set up GPU leaf library build toolchain
* [ARROW-1392](https://issues.apache.org/jira/browse/ARROW-1392) - [C++] Implement reader and writer IO interfaces for GPU buffers
* [ARROW-1395](https://issues.apache.org/jira/browse/ARROW-1395) - [C++] Remove APIs deprecated as of 0.5.0 and later versions
* [ARROW-1396](https://issues.apache.org/jira/browse/ARROW-1396) - [C++] Add PrettyPrint function for Schemas, which also outputs any dictionaries
* [ARROW-1397](https://issues.apache.org/jira/browse/ARROW-1397) - [Packaging] Use Docker instead of Vagrant
* [ARROW-1399](https://issues.apache.org/jira/browse/ARROW-1399) - [C++] Add CUDA build version in a public header to help prevent ABI conflicts
* [ARROW-1400](https://issues.apache.org/jira/browse/ARROW-1400) - [Python] Ability to create partitions when writing to Parquet
* [ARROW-1401](https://issues.apache.org/jira/browse/ARROW-1401) - [C++] Add extra debugging context to failures in RETURN\_NOT\_OK in debug builds
* [ARROW-1401](https://issues.apache.org/jira/browse/ARROW-1401) - [C++] Add extra debugging context to failures in RETURN\_NOT\_OK in debug builds
* [ARROW-1402](https://issues.apache.org/jira/browse/ARROW-1402) - [C++] Possibly deprecate public APIs that use MutableBuffer
* [ARROW-1404](https://issues.apache.org/jira/browse/ARROW-1404) - [Packaging] Build .deb and .rpm on Travis CI
* [ARROW-1405](https://issues.apache.org/jira/browse/ARROW-1405) - [Python] Add logging option for verbose memory allocations
* [ARROW-1406](https://issues.apache.org/jira/browse/ARROW-1406) - [Python] Harden user API for generating serialized schema and record batch messages as memoryview-compatible objects
* [ARROW-1408](https://issues.apache.org/jira/browse/ARROW-1408) - [C++] Refactor and make IPC read / write APIs more consistent, add appropriate deprecations
* [ARROW-1410](https://issues.apache.org/jira/browse/ARROW-1410) - Plasma object store occasionally pauses for a long time
* [ARROW-1412](https://issues.apache.org/jira/browse/ARROW-1412) - [Plasma] Add higher level API for putting and getting Python objects
* [ARROW-1413](https://issues.apache.org/jira/browse/ARROW-1413) - [C++] Add include-what-you-use configuration
* [ARROW-1415](https://issues.apache.org/jira/browse/ARROW-1415) - [GLib] Support date32 and date64
* [ARROW-1416](https://issues.apache.org/jira/browse/ARROW-1416) - [Format] Clarify example array in memory layout documentation
* [ARROW-1417](https://issues.apache.org/jira/browse/ARROW-1417) - [Python] Allow more generic filesystem objects to be passed to ParquetDataset
* [ARROW-1418](https://issues.apache.org/jira/browse/ARROW-1418) - [Python] Introduce SerializationContext to register custom serialization callbacks
* [ARROW-1419](https://issues.apache.org/jira/browse/ARROW-1419) - [GLib] Suppress sign-conversion warning on Clang
* [ARROW-1427](https://issues.apache.org/jira/browse/ARROW-1427) - [GLib] Add a link to readme of Arrow GLib
* [ARROW-1428](https://issues.apache.org/jira/browse/ARROW-1428) - [C++] Append steps to clone source code to README.mb
* [ARROW-1432](https://issues.apache.org/jira/browse/ARROW-1432) - [C++] Build bundled jemalloc functions with private prefix
* [ARROW-1433](https://issues.apache.org/jira/browse/ARROW-1433) - [C++] Simplify implementation of Array::Slice
* [ARROW-1438](https://issues.apache.org/jira/browse/ARROW-1438) - [Plasma] Pull SerializationContext through PlasmaClient put and get
* [ARROW-1441](https://issues.apache.org/jira/browse/ARROW-1441) - [Site] Add Ruby to Flexible section
* [ARROW-1442](https://issues.apache.org/jira/browse/ARROW-1442) - [Website] Add pointer to nightly conda packages on /install
* [ARROW-1447](https://issues.apache.org/jira/browse/ARROW-1447) - [C++] Round of include-what-you-use include cleanups
* [ARROW-1448](https://issues.apache.org/jira/browse/ARROW-1448) - [Packaging] Support uploading built .deb and .rpm to Bintray
* [ARROW-1449](https://issues.apache.org/jira/browse/ARROW-1449) - Implement Decimal using only Int128
* [ARROW-1451](https://issues.apache.org/jira/browse/ARROW-1451) - [C++] Create arrow/io/api.h
* [ARROW-1460](https://issues.apache.org/jira/browse/ARROW-1460) - [C++] Upgrade clang-format used to LLVM 4.0
* [ARROW-1462](https://issues.apache.org/jira/browse/ARROW-1462) - [GLib] Support time array
* [ARROW-1466](https://issues.apache.org/jira/browse/ARROW-1466) - [C++] Support DecimalArray in arrow::PrettyPrint
* [ARROW-1468](https://issues.apache.org/jira/browse/ARROW-1468) - [C++] Append to PrimitiveBuilder from std::vector<CTYPE\>
* [ARROW-1479](https://issues.apache.org/jira/browse/ARROW-1479) - [JS] Expand JavaScript implementation
* [ARROW-1480](https://issues.apache.org/jira/browse/ARROW-1480) - [Python] Improve performance of serializing sets
* [ARROW-1481](https://issues.apache.org/jira/browse/ARROW-1481) - [C++] Expose type casts as generic callable object that can write into pre-allocated memory
* [ARROW-1494](https://issues.apache.org/jira/browse/ARROW-1494) - [C++] Document that shared\_ptr returned by RecordBatch::column needs to be retained
* [ARROW-1499](https://issues.apache.org/jira/browse/ARROW-1499) - [Python] Consider adding option to parquet.write\_table that sets options for maximum Spark compatibility
* [ARROW-1504](https://issues.apache.org/jira/browse/ARROW-1504) - [GLib] Support timestamp
* [ARROW-1505](https://issues.apache.org/jira/browse/ARROW-1505) - [GLib] Simplify arguments check
* [ARROW-1506](https://issues.apache.org/jira/browse/ARROW-1506) - [C++] Support pkg-config for compute modules
* [ARROW-1508](https://issues.apache.org/jira/browse/ARROW-1508) - C++: Add support for FixedSizeBinaryType in DictionaryBuilder
* [ARROW-1510](https://issues.apache.org/jira/browse/ARROW-1510) - [C++] Support cast
* [ARROW-1511](https://issues.apache.org/jira/browse/ARROW-1511) - [C++] Deprecate arrow::MakePrimitiveArray
* [ARROW-1513](https://issues.apache.org/jira/browse/ARROW-1513) - C++: Add cast from Dictionary to plain arrays
* [ARROW-1515](https://issues.apache.org/jira/browse/ARROW-1515) - [GLib] Detect version directly
* [ARROW-1516](https://issues.apache.org/jira/browse/ARROW-1516) - [GLib] Update document
* [ARROW-1517](https://issues.apache.org/jira/browse/ARROW-1517) - Remove unnecessary temporary in DecimalUtil::ToString function
* [ARROW-1519](https://issues.apache.org/jira/browse/ARROW-1519) - [C++] Move DecimalUtil functions to methods on the Int128 class
* [ARROW-1528](https://issues.apache.org/jira/browse/ARROW-1528) - [GLib] Resolve include dependency
* [ARROW-1530](https://issues.apache.org/jira/browse/ARROW-1530) - [C++] Install arrow/util/parallel.h
* [ARROW-1551](https://issues.apache.org/jira/browse/ARROW-1551) - [Website] Updates for 0.7.0 release
* [ARROW-1597](https://issues.apache.org/jira/browse/ARROW-1597) - [Packaging] arrow-compute.pc is missing in .deb/.rpm file list



# Apache Arrow 0.6.0 (2017-08-14)

## Bug Fixes

* [ARROW-187](https://issues.apache.org/jira/browse/ARROW-187) - [C++] Decide on how pedantic we want to be about exceptions
* [ARROW-276](https://issues.apache.org/jira/browse/ARROW-276) - [JAVA] Nullable Value Vectors should extend BaseValueVector instead of BaseDataValueVector
* [ARROW-573](https://issues.apache.org/jira/browse/ARROW-573) - [Python/C++] Support ordered dictionaries data, pandas Categorical
* [ARROW-884](https://issues.apache.org/jira/browse/ARROW-884) - [C++] Exclude internal classes from documentation
* [ARROW-932](https://issues.apache.org/jira/browse/ARROW-932) - [Python] Fix compiler warnings on MSVC
* [ARROW-968](https://issues.apache.org/jira/browse/ARROW-968) - [Python] RecordBatch [i:j] syntax is incomplete
* [ARROW-1192](https://issues.apache.org/jira/browse/ARROW-1192) - [JAVA] Improve splitAndTransfer performance for List and Union vectors
* [ARROW-1195](https://issues.apache.org/jira/browse/ARROW-1195) - [C++] CpuInfo doesn't get cache size on Windows
* [ARROW-1204](https://issues.apache.org/jira/browse/ARROW-1204) - [C++] lz4 ExternalProject fails in Visual Studio 2015
* [ARROW-1225](https://issues.apache.org/jira/browse/ARROW-1225) - [Python] pyarrow.array does not attempt to convert bytes to UTF8 when passed a StringType
* [ARROW-1237](https://issues.apache.org/jira/browse/ARROW-1237) - [JAVA] Expose the ability to set lastSet
* [ARROW-1239](https://issues.apache.org/jira/browse/ARROW-1239) - issue with current version of git-commit-id-plugin
* [ARROW-1240](https://issues.apache.org/jira/browse/ARROW-1240) - security: upgrade logback to address CVE-2017-5929
* [ARROW-1240](https://issues.apache.org/jira/browse/ARROW-1240) - security: upgrade logback to address CVE-2017-5929
* [ARROW-1241](https://issues.apache.org/jira/browse/ARROW-1241) - [C++] Visual Studio 2017 Appveyor build job
* [ARROW-1242](https://issues.apache.org/jira/browse/ARROW-1242) - [Java] security - upgrade Jackson to mitigate 3 CVE vulnerabilities
* [ARROW-1242](https://issues.apache.org/jira/browse/ARROW-1242) - [Java] security - upgrade Jackson to mitigate 3 CVE vulnerabilities
* [ARROW-1245](https://issues.apache.org/jira/browse/ARROW-1245) - [Integration] Java Integration Tests Disabled
* [ARROW-1248](https://issues.apache.org/jira/browse/ARROW-1248) - [Python] C linkage warnings in Clang with public Cython API
* [ARROW-1249](https://issues.apache.org/jira/browse/ARROW-1249) - [JAVA] Expose the fillEmpties function from Nullable<Varlength\>Vector.mutator
* [ARROW-1263](https://issues.apache.org/jira/browse/ARROW-1263) - [C++] CpuInfo should be able to get CPU features on Windows
* [ARROW-1265](https://issues.apache.org/jira/browse/ARROW-1265) - [Plasma] Plasma store memory leak warnings in Python test suite
* [ARROW-1267](https://issues.apache.org/jira/browse/ARROW-1267) - [Java] Handle zero length case in BitVector.splitAndTransfer
* [ARROW-1269](https://issues.apache.org/jira/browse/ARROW-1269) - [Packaging] Add Windows wheel build scripts from ARROW-1068 to arrow-dist
* [ARROW-1275](https://issues.apache.org/jira/browse/ARROW-1275) - [C++] Default static library prefix for Snappy should be "\_static"
* [ARROW-1276](https://issues.apache.org/jira/browse/ARROW-1276) - Cannot serializer empty DataFrame to parquet
* [ARROW-1283](https://issues.apache.org/jira/browse/ARROW-1283) - [Java] VectorSchemaRoot should be able to be closed() more than once
* [ARROW-1285](https://issues.apache.org/jira/browse/ARROW-1285) - PYTHON: NotImplemented exception creates empty parquet file
* [ARROW-1287](https://issues.apache.org/jira/browse/ARROW-1287) - [Python] Emulate "whence" argument of seek in NativeFile
* [ARROW-1290](https://issues.apache.org/jira/browse/ARROW-1290) - [C++] Use array capacity doubling in arrow::BufferBuilder
* [ARROW-1291](https://issues.apache.org/jira/browse/ARROW-1291) - [Python] pa.RecordBatch.from\_pandas doesn't accept DataFrame with numeric column names
* [ARROW-1294](https://issues.apache.org/jira/browse/ARROW-1294) - [C++] New Appveyor build failures
* [ARROW-1296](https://issues.apache.org/jira/browse/ARROW-1296) - [Java] templates/FixValueVectors reset() method doesn't set allocationSizeInBytes correctly
* [ARROW-1300](https://issues.apache.org/jira/browse/ARROW-1300) - [JAVA] Fix ListVector Tests
* [ARROW-1306](https://issues.apache.org/jira/browse/ARROW-1306) - [Python] Encoding? issue with error reporting for parquet.read\_table
* [ARROW-1308](https://issues.apache.org/jira/browse/ARROW-1308) - [C++] ld tries to link 'arrow\_static' even when -DARROW\_BUILD\_STATIC=off
* [ARROW-1309](https://issues.apache.org/jira/browse/ARROW-1309) - [Python] Error inferring List type in Array.from\_pandas when inner values are all None
* [ARROW-1310](https://issues.apache.org/jira/browse/ARROW-1310) - [JAVA] Revert ARROW-886
* [ARROW-1311](https://issues.apache.org/jira/browse/ARROW-1311) - python hangs after write a few parquet tables
* [ARROW-1312](https://issues.apache.org/jira/browse/ARROW-1312) - [C++] Set default value to ARROW\_JEMALLOC to OFF until ARROW-1282 is resolved
* [ARROW-1312](https://issues.apache.org/jira/browse/ARROW-1312) - [C++] Set default value to ARROW\_JEMALLOC to OFF until ARROW-1282 is resolved
* [ARROW-1326](https://issues.apache.org/jira/browse/ARROW-1326) - [Python] Fix Sphinx build in Travis CI
* [ARROW-1327](https://issues.apache.org/jira/browse/ARROW-1327) - [Python] Failing to release GIL in MemoryMappedFile.\_open causes deadlock
* [ARROW-1328](https://issues.apache.org/jira/browse/ARROW-1328) - [Python] pyarrow.Table.from\_pandas option timestamps\_to\_ms changes column values
* [ARROW-1330](https://issues.apache.org/jira/browse/ARROW-1330) - [Plasma] Turn on plasma tests on manylinux1
* [ARROW-1335](https://issues.apache.org/jira/browse/ARROW-1335) - [C++] PrimitiveArray::raw\_values has inconsistent semantics re: offsets compared with subclasses
* [ARROW-1338](https://issues.apache.org/jira/browse/ARROW-1338) - [Python] Investigate non-deterministic core dump on Python 2.7, Travis CI builds
* [ARROW-1340](https://issues.apache.org/jira/browse/ARROW-1340) - [Java] NullableMapVector field doesn't maintain metadata
* [ARROW-1342](https://issues.apache.org/jira/browse/ARROW-1342) - [Python] Support strided array of lists
* [ARROW-1343](https://issues.apache.org/jira/browse/ARROW-1343) - [Format/Java/C++] Ensuring encapsulated stream / IPC message sizes are always a multiple of 8
* [ARROW-1350](https://issues.apache.org/jira/browse/ARROW-1350) - [C++] Include Plasma source tree in source distribution


## New Features and Improvements

* [ARROW-439](https://issues.apache.org/jira/browse/ARROW-439) - [Python] Add option in "to\_pandas" conversions to yield Categorical from String/Binary arrays
* [ARROW-622](https://issues.apache.org/jira/browse/ARROW-622) - [Python] Investigate alternatives to timestamps\_to\_ms argument in pandas conversion
* [ARROW-1076](https://issues.apache.org/jira/browse/ARROW-1076) - [Python] Handle nanosecond timestamps more gracefully when writing to Parquet format
* [ARROW-1093](https://issues.apache.org/jira/browse/ARROW-1093) - [Python] Fail Python builds if flake8 yields warnings
* [ARROW-1104](https://issues.apache.org/jira/browse/ARROW-1104) - Integrate in-memory object store from Ray
* [ARROW-1116](https://issues.apache.org/jira/browse/ARROW-1116) - [Python] Create single external GitHub repo building for building wheels for all platforms in one shot
* [ARROW-1121](https://issues.apache.org/jira/browse/ARROW-1121) - [C++] Improve error message when opening OS file fails
* [ARROW-1140](https://issues.apache.org/jira/browse/ARROW-1140) - [C++] Allow optional build of plasma
* [ARROW-1149](https://issues.apache.org/jira/browse/ARROW-1149) - [Plasma] Create Cython client library for Plasma
* [ARROW-1173](https://issues.apache.org/jira/browse/ARROW-1173) - [Plasma] Blog post for Plasma
* [ARROW-1211](https://issues.apache.org/jira/browse/ARROW-1211) - [C++] Consider making default\_memory\_pool() the default for builder classes
* [ARROW-1213](https://issues.apache.org/jira/browse/ARROW-1213) - [Python] Enable s3fs to be used with ParquetDataset and reader/writer functions
* [ARROW-1219](https://issues.apache.org/jira/browse/ARROW-1219) - [C++] Use more vanilla Google C++ formatting
* [ARROW-1224](https://issues.apache.org/jira/browse/ARROW-1224) - [Format] Clarify language around buffer padding and alignment in IPC
* [ARROW-1230](https://issues.apache.org/jira/browse/ARROW-1230) - [Plasma] Install libraries and headers
* [ARROW-1243](https://issues.apache.org/jira/browse/ARROW-1243) - [Java] security: upgrade all libraries to latest stable versions
* [ARROW-1246](https://issues.apache.org/jira/browse/ARROW-1246) - [Format] Add Map logical type to metadata
* [ARROW-1251](https://issues.apache.org/jira/browse/ARROW-1251) - [Python/C++] Revise build documentation to account for latest build toolchain
* [ARROW-1253](https://issues.apache.org/jira/browse/ARROW-1253) - [C++] Use pre-built toolchain libraries where prudent to speed up CI builds
* [ARROW-1255](https://issues.apache.org/jira/browse/ARROW-1255) - [Plasma] Check plasma flatbuffer messages with the flatbuffer verifier
* [ARROW-1256](https://issues.apache.org/jira/browse/ARROW-1256) - [Plasma] Fix compile warnings on macOS
* [ARROW-1257](https://issues.apache.org/jira/browse/ARROW-1257) - [Plasma] Plasma documentation
* [ARROW-1258](https://issues.apache.org/jira/browse/ARROW-1258) - [C++] Suppress dlmalloc warnings on Clang
* [ARROW-1259](https://issues.apache.org/jira/browse/ARROW-1259) - [Plasma] Speed up Plasma tests
* [ARROW-1260](https://issues.apache.org/jira/browse/ARROW-1260) - [Plasma] Use factory method to create Python PlasmaClient
* [ARROW-1264](https://issues.apache.org/jira/browse/ARROW-1264) - [Plasma] Don't exit the Python interpreter if the plasma client can't connect to the store
* [ARROW-1268](https://issues.apache.org/jira/browse/ARROW-1268) - [Website] Blog post on Arrow integration with Spark
* [ARROW-1270](https://issues.apache.org/jira/browse/ARROW-1270) - [Packaging] Add Python wheel build scripts for macOS to arrow-dist
* [ARROW-1272](https://issues.apache.org/jira/browse/ARROW-1272) - [Python] Add script to arrow-dist to generate and upload manylinux1 Python wheels
* [ARROW-1273](https://issues.apache.org/jira/browse/ARROW-1273) - [Python] Add convenience functions for reading only Parquet metadata or effective Arrow schema from a particular Parquet file
* [ARROW-1274](https://issues.apache.org/jira/browse/ARROW-1274) - [C++] add\_compiler\_export\_flags() throws warning with CMake \>= 3.3
* [ARROW-1281](https://issues.apache.org/jira/browse/ARROW-1281) - [C++/Python] Add Docker setup for running HDFS tests and other tests we may not run in Travis CI
* [ARROW-1288](https://issues.apache.org/jira/browse/ARROW-1288) - Clean up many ASF license headers
* [ARROW-1289](https://issues.apache.org/jira/browse/ARROW-1289) - [Python] Add PYARROW\_BUILD\_PLASMA option like Parquet
* [ARROW-1297](https://issues.apache.org/jira/browse/ARROW-1297) - 0.6.0 Release
* [ARROW-1301](https://issues.apache.org/jira/browse/ARROW-1301) - [C++/Python] Add remaining supported libhdfs UNIX-like filesystem APIs
* [ARROW-1303](https://issues.apache.org/jira/browse/ARROW-1303) - [C++] Support downloading Boost
* [ARROW-1304](https://issues.apache.org/jira/browse/ARROW-1304) - [Java] Fix checkstyle checks warning
* [ARROW-1305](https://issues.apache.org/jira/browse/ARROW-1305) - [GLib] Add GArrowIntArrayBuilder
* [ARROW-1315](https://issues.apache.org/jira/browse/ARROW-1315) - [GLib] Status check of arrow::ArrayBuilder::Finish() is missing
* [ARROW-1323](https://issues.apache.org/jira/browse/ARROW-1323) - [GLib] Add garrow\_boolean\_array\_get\_values()
* [ARROW-1333](https://issues.apache.org/jira/browse/ARROW-1333) - [Plasma] Sorting example for DataFrames in plasma
* [ARROW-1334](https://issues.apache.org/jira/browse/ARROW-1334) - [C++] Instantiate arrow::Table from vector of Array objects (instead of Columns)
* [ARROW-1336](https://issues.apache.org/jira/browse/ARROW-1336) - [C++] Add arrow::schema factory function
* [ARROW-1353](https://issues.apache.org/jira/browse/ARROW-1353) - [Website] Updates + blog post for 0.6.0 release



# Apache Arrow 0.5.0 (2017-07-23)

## New Features and Improvements

* [ARROW-111](https://issues.apache.org/jira/browse/ARROW-111) - [C++] Add static analyzer to tool chain to verify checking of Status returns
* [ARROW-195](https://issues.apache.org/jira/browse/ARROW-195) - [C++] Upgrade clang bits to clang-3.8 and move back to trusty.
* [ARROW-460](https://issues.apache.org/jira/browse/ARROW-460) - [C++] Implement JSON round trip for DictionaryArray
* [ARROW-462](https://issues.apache.org/jira/browse/ARROW-462) - [C++] Implement in-memory conversions between non-nested primitive types and DictionaryArray equivalent
* [ARROW-575](https://issues.apache.org/jira/browse/ARROW-575) - Python: Auto-detect nested lists and nested numpy arrays in Pandas
* [ARROW-597](https://issues.apache.org/jira/browse/ARROW-597) - [Python] Add convenience function to yield DataFrame from any object that a StreamReader or FileReader can read from
* [ARROW-599](https://issues.apache.org/jira/browse/ARROW-599) - [C++] Add LZ4 codec to 3rd-party toolchain
* [ARROW-599](https://issues.apache.org/jira/browse/ARROW-599) - [C++] Add LZ4 codec to 3rd-party toolchain
* [ARROW-600](https://issues.apache.org/jira/browse/ARROW-600) - [C++] Add ZSTD codec to 3rd-party toolchain
* [ARROW-692](https://issues.apache.org/jira/browse/ARROW-692) - Java<-\>C++ Integration tests for dictionary-encoded vectors
* [ARROW-693](https://issues.apache.org/jira/browse/ARROW-693) - [Java] Add JSON support for dictionary vectors
* [ARROW-742](https://issues.apache.org/jira/browse/ARROW-742) - Handling exceptions during execution of std::wstring\_convert
* [ARROW-742](https://issues.apache.org/jira/browse/ARROW-742) - Handling exceptions during execution of std::wstring\_convert
* [ARROW-834](https://issues.apache.org/jira/browse/ARROW-834) - [Python] Support creating Arrow arrays from Python iterables
* [ARROW-915](https://issues.apache.org/jira/browse/ARROW-915) - Struct Array reads limited support
* [ARROW-935](https://issues.apache.org/jira/browse/ARROW-935) - [Java] Build Javadoc in Travis CI
* [ARROW-960](https://issues.apache.org/jira/browse/ARROW-960) - [Python] Add source build guide for macOS + Homebrew
* [ARROW-962](https://issues.apache.org/jira/browse/ARROW-962) - [Python] Add schema attribute to FileReader
* [ARROW-964](https://issues.apache.org/jira/browse/ARROW-964) - [Python] Improve api docs
* [ARROW-966](https://issues.apache.org/jira/browse/ARROW-966) - [Python] pyarrow.list\_ should also accept Field instance
* [ARROW-978](https://issues.apache.org/jira/browse/ARROW-978) - [Python] Use sphinx-bootstrap-theme for Sphinx documentation
* [ARROW-1041](https://issues.apache.org/jira/browse/ARROW-1041) - [Python] Support read\_pandas on a directory of Parquet files
* [ARROW-1048](https://issues.apache.org/jira/browse/ARROW-1048) - Allow user LD\_LIBRARY\_PATH to be used with source release script
* [ARROW-1052](https://issues.apache.org/jira/browse/ARROW-1052) - Arrow 0.5.0 release
* [ARROW-1071](https://issues.apache.org/jira/browse/ARROW-1071) - [Python] RecordBatchFileReader does not have a schema property
* [ARROW-1073](https://issues.apache.org/jira/browse/ARROW-1073) - C++: Adapative integer builder
* [ARROW-1095](https://issues.apache.org/jira/browse/ARROW-1095) - [Website] Add Arrow icon asset
* [ARROW-1100](https://issues.apache.org/jira/browse/ARROW-1100) - [Python] Add "mode" property to NativeFile instances
* [ARROW-1102](https://issues.apache.org/jira/browse/ARROW-1102) - Make MessageSerializer.serializeMessage() public
* [ARROW-1120](https://issues.apache.org/jira/browse/ARROW-1120) - [Python] Write support for int96
* [ARROW-1122](https://issues.apache.org/jira/browse/ARROW-1122) - [Website] Guest blog post on Arrow + ODBC from turbodbc
* [ARROW-1122](https://issues.apache.org/jira/browse/ARROW-1122) - [Website] Guest blog post on Arrow + ODBC from turbodbc
* [ARROW-1123](https://issues.apache.org/jira/browse/ARROW-1123) - C++: Make jemalloc the default allocator
* [ARROW-1135](https://issues.apache.org/jira/browse/ARROW-1135) - Upgrade Travis CI clang builds to use LLVM 4.0
* [ARROW-1137](https://issues.apache.org/jira/browse/ARROW-1137) - Python: Ensure Pandas roundtrip of all-None column
* [ARROW-1142](https://issues.apache.org/jira/browse/ARROW-1142) - [C++] Move over compression library toolchain from parquet-cpp
* [ARROW-1145](https://issues.apache.org/jira/browse/ARROW-1145) - [GLib] Add get\_values()
* [ARROW-1146](https://issues.apache.org/jira/browse/ARROW-1146) - Add .gitignore for \*\_generated.h files in src/plasma/format
* [ARROW-1148](https://issues.apache.org/jira/browse/ARROW-1148) - [C++] Raise minimum CMake version to 3.2
* [ARROW-1151](https://issues.apache.org/jira/browse/ARROW-1151) - [C++] Add gcc branch prediction to status check macro
* [ARROW-1154](https://issues.apache.org/jira/browse/ARROW-1154) - [C++] Migrate more computational utility code from parquet-cpp
* [ARROW-1160](https://issues.apache.org/jira/browse/ARROW-1160) - C++: Implement DictionaryBuilder
* [ARROW-1165](https://issues.apache.org/jira/browse/ARROW-1165) - [C++] Refactor PythonDecimalToArrowDecimal to not use templates
* [ARROW-1172](https://issues.apache.org/jira/browse/ARROW-1172) - [C++] Use unique\_ptr with array builder classes
* [ARROW-1183](https://issues.apache.org/jira/browse/ARROW-1183) - [Python] Implement time type conversions in to\_pandas
* [ARROW-1185](https://issues.apache.org/jira/browse/ARROW-1185) - [C++] Clean up arrow::Status implementation, add warn\_unused\_result attribute for clang
* [ARROW-1187](https://issues.apache.org/jira/browse/ARROW-1187) - Serialize a DataFrame with None column
* [ARROW-1193](https://issues.apache.org/jira/browse/ARROW-1193) - [C++] Support pkg-config forarrow\_python.so
* [ARROW-1196](https://issues.apache.org/jira/browse/ARROW-1196) - [C++] Appveyor separate jobs for Debug/Release builds from sources; Build with conda toolchain; Build with NMake Makefiles Generator
* [ARROW-1198](https://issues.apache.org/jira/browse/ARROW-1198) - Python: Add public C++ API to unwrap PyArrow object
* [ARROW-1199](https://issues.apache.org/jira/browse/ARROW-1199) - [C++] Introduce mutable POD struct for generic array data
* [ARROW-1202](https://issues.apache.org/jira/browse/ARROW-1202) - Remove semicolons from status macros
* [ARROW-1212](https://issues.apache.org/jira/browse/ARROW-1212) - [GLib] Add garrow\_binary\_array\_get\_offsets\_buffer()
* [ARROW-1214](https://issues.apache.org/jira/browse/ARROW-1214) - [Python] Add classes / functions to enable stream message components to be handled outside of the stream reader class
* [ARROW-1217](https://issues.apache.org/jira/browse/ARROW-1217) - [GLib] Add GInputStream based arrow::io::RandomAccessFile
* [ARROW-1220](https://issues.apache.org/jira/browse/ARROW-1220) - [C++] Standartize usage of \*\_HOME cmake script variables for 3rd party libs
* [ARROW-1221](https://issues.apache.org/jira/browse/ARROW-1221) - [C++] Pin clang-format version
* [ARROW-1227](https://issues.apache.org/jira/browse/ARROW-1227) - [GLib] Support GOutputStream
* [ARROW-1229](https://issues.apache.org/jira/browse/ARROW-1229) - [GLib] Follow Reader API change (get -\> read)
* [ARROW-1244](https://issues.apache.org/jira/browse/ARROW-1244) - [C++] Do not include cpp/src/plasma in source release pending IP clearance
* [ARROW-1252](https://issues.apache.org/jira/browse/ARROW-1252) - [Website] Update for 0.5.0 release, add blog post summarizing changes from 0.4.x


## Bug Fixes

* [ARROW-288](https://issues.apache.org/jira/browse/ARROW-288) - Implement Arrow adapter for Spark Datasets
* [ARROW-601](https://issues.apache.org/jira/browse/ARROW-601) - Some logical types not supported when loading Parquet
* [ARROW-784](https://issues.apache.org/jira/browse/ARROW-784) - Cleaning up thirdparty toolchain support in Arrow on Windows
* [ARROW-785](https://issues.apache.org/jira/browse/ARROW-785) - possible issue on writing parquet via pyarrow, subsequently read in Hive
* [ARROW-924](https://issues.apache.org/jira/browse/ARROW-924) - Setting GTEST\_HOME Fails on CMake run
* [ARROW-992](https://issues.apache.org/jira/browse/ARROW-992) - [Python] In place development builds do not have a \_\_version\_\_
* [ARROW-1043](https://issues.apache.org/jira/browse/ARROW-1043) - [Python] Make sure pandas metadata created by arrow conforms to the pandas spec
* [ARROW-1074](https://issues.apache.org/jira/browse/ARROW-1074) - from\_pandas doesnt convert ndarray to list
* [ARROW-1079](https://issues.apache.org/jira/browse/ARROW-1079) - [Python] Empty "private" directories should be ignored by Parquet interface
* [ARROW-1081](https://issues.apache.org/jira/browse/ARROW-1081) - C++: arrow::test::TestBase::MakePrimitive doesn't fill null\_bitmap
* [ARROW-1096](https://issues.apache.org/jira/browse/ARROW-1096) - [C++] Memory mapping file over 4GB fails on Windows
* [ARROW-1097](https://issues.apache.org/jira/browse/ARROW-1097) - Reading tensor needs file to be opened in writeable mode
* [ARROW-1098](https://issues.apache.org/jira/browse/ARROW-1098) - Document Error?
* [ARROW-1101](https://issues.apache.org/jira/browse/ARROW-1101) - UnionListWriter is not implementing all methods on interface ScalarWriter
* [ARROW-1103](https://issues.apache.org/jira/browse/ARROW-1103) - [Python] Utilize pandas metadata from common \_metadata Parquet file if it exists
* [ARROW-1107](https://issues.apache.org/jira/browse/ARROW-1107) - [JAVA] NullableMapVector getField() should return nullable type
* [ARROW-1108](https://issues.apache.org/jira/browse/ARROW-1108) - Check if ArrowBuf is empty buffer in getActualConsumedMemory() and getPossibleConsumedMemory()
* [ARROW-1109](https://issues.apache.org/jira/browse/ARROW-1109) - [JAVA] transferOwnership fails when readerIndex is not 0
* [ARROW-1110](https://issues.apache.org/jira/browse/ARROW-1110) - [JAVA] make union vector naming consistent
* [ARROW-1111](https://issues.apache.org/jira/browse/ARROW-1111) - [JAVA] Make aligning buffers optional, and allow -1 for unknown null count
* [ARROW-1112](https://issues.apache.org/jira/browse/ARROW-1112) - [JAVA] Set lastSet for VarLength and List vectors when loading
* [ARROW-1113](https://issues.apache.org/jira/browse/ARROW-1113) - [C++] gflags EP build gets triggered (as a no-op) on subsequent calls to make or ninja build
* [ARROW-1115](https://issues.apache.org/jira/browse/ARROW-1115) - [C++] Use absolute path for ccache
* [ARROW-1117](https://issues.apache.org/jira/browse/ARROW-1117) - [Docs] Minor issues in GLib README
* [ARROW-1124](https://issues.apache.org/jira/browse/ARROW-1124) - [Python] pyarrow needs to depend on numpy\>=1.10 (not 1.9)
* [ARROW-1125](https://issues.apache.org/jira/browse/ARROW-1125) - Python: Table.from\_pandas doesn't work anymore on partial schemas
* [ARROW-1125](https://issues.apache.org/jira/browse/ARROW-1125) - Python: Table.from\_pandas doesn't work anymore on partial schemas
* [ARROW-1128](https://issues.apache.org/jira/browse/ARROW-1128) - [Docs] command to build a wheel is not properly rendered
* [ARROW-1129](https://issues.apache.org/jira/browse/ARROW-1129) - [C++] Fix Linux toolchain build regression from ARROW-742
* [ARROW-1130](https://issues.apache.org/jira/browse/ARROW-1130) - io-hdfs-test failure
* [ARROW-1131](https://issues.apache.org/jira/browse/ARROW-1131) - Python: Parquet unit tests are always skipped
* [ARROW-1132](https://issues.apache.org/jira/browse/ARROW-1132) - [Python] Unable to write pandas DataFrame w/MultiIndex containing duplicate values to parquet
* [ARROW-1136](https://issues.apache.org/jira/browse/ARROW-1136) - [C++/Python] Segfault on empty stream
* [ARROW-1138](https://issues.apache.org/jira/browse/ARROW-1138) - Travis: Use OpenJDK7 instead of OracleJDK7
* [ARROW-1139](https://issues.apache.org/jira/browse/ARROW-1139) - [C++] dlmalloc doesn't allow arrow to be built with clang 4 or gcc 7.1.1
* [ARROW-1141](https://issues.apache.org/jira/browse/ARROW-1141) - on import get libjemalloc.so.2: cannot allocate memory in static TLS block
* [ARROW-1143](https://issues.apache.org/jira/browse/ARROW-1143) - C++: Fix comparison of NullArray
* [ARROW-1144](https://issues.apache.org/jira/browse/ARROW-1144) - [C++] Remove unused variable
* [ARROW-1147](https://issues.apache.org/jira/browse/ARROW-1147) - [C++] Allow optional vendoring of flatbuffers in plasma
* [ARROW-1150](https://issues.apache.org/jira/browse/ARROW-1150) - [C++] AdaptiveIntBuilder compiler warning on MSVC
* [ARROW-1152](https://issues.apache.org/jira/browse/ARROW-1152) - [Cython] read\_tensor should work with a readable file
* [ARROW-1153](https://issues.apache.org/jira/browse/ARROW-1153) - All non-Pandas column throws NotImplemented: unhandled type
* [ARROW-1155](https://issues.apache.org/jira/browse/ARROW-1155) - segmentation fault when run pa.Int16Value()
* [ARROW-1157](https://issues.apache.org/jira/browse/ARROW-1157) - C++/Python: Decimal templates are not correctly exported on OSX
* [ARROW-1159](https://issues.apache.org/jira/browse/ARROW-1159) - [C++] Static data members cannot be accessed from inline functions in Arrow headers by thirdparty users
* [ARROW-1162](https://issues.apache.org/jira/browse/ARROW-1162) - Transfer Between Empty Lists Should Not Invoke Callback
* [ARROW-1164](https://issues.apache.org/jira/browse/ARROW-1164) - C++: Templated functions need ARROW\_EXPORT instead of ARROW\_TEMPLATE\_EXPORT
* [ARROW-1166](https://issues.apache.org/jira/browse/ARROW-1166) - Errors in Struct type's example and missing reference in Layout.md
* [ARROW-1167](https://issues.apache.org/jira/browse/ARROW-1167) - [Python] Create chunked BinaryArray in Table.from\_pandas when a column's data exceeds 2GB
* [ARROW-1168](https://issues.apache.org/jira/browse/ARROW-1168) - [Python] pandas metadata may contain "mixed" data types
* [ARROW-1169](https://issues.apache.org/jira/browse/ARROW-1169) - C++: jemalloc externalproject doesn't build with CMake's ninja generator
* [ARROW-1170](https://issues.apache.org/jira/browse/ARROW-1170) - C++: ARROW\_JEMALLOC=OFF breaks linking on unittest
* [ARROW-1174](https://issues.apache.org/jira/browse/ARROW-1174) - [GLib] Investigate root cause of ListArray glib test failure
* [ARROW-1177](https://issues.apache.org/jira/browse/ARROW-1177) - [C++] Detect int32 overflow in ListBuilder::Append
* [ARROW-1179](https://issues.apache.org/jira/browse/ARROW-1179) - C++: Add missing virtual destructors
* [ARROW-1180](https://issues.apache.org/jira/browse/ARROW-1180) - [GLib] garrow\_tensor\_get\_dimension\_name() returns invalid address
* [ARROW-1181](https://issues.apache.org/jira/browse/ARROW-1181) - [Python] Parquet test fail if not enabled
* [ARROW-1182](https://issues.apache.org/jira/browse/ARROW-1182) - C++: Specify BUILD\_BYPRODUCTS for zlib and zstd
* [ARROW-1186](https://issues.apache.org/jira/browse/ARROW-1186) - [C++] Enable option to build arrow with minimal dependencies needed to build Parquet library
* [ARROW-1188](https://issues.apache.org/jira/browse/ARROW-1188) - Segfault when trying to serialize a DataFrame with Null-only Categorical Column
* [ARROW-1190](https://issues.apache.org/jira/browse/ARROW-1190) - VectorLoader corrupts vectors with duplicate names
* [ARROW-1191](https://issues.apache.org/jira/browse/ARROW-1191) - [JAVA] Implement getField() method for the complex readers
* [ARROW-1194](https://issues.apache.org/jira/browse/ARROW-1194) - Getting record batch size with pa.get\_record\_batch\_size returns a size that is too small for pandas DataFrame.
* [ARROW-1197](https://issues.apache.org/jira/browse/ARROW-1197) - [GLib] record\_batch.hpp Inclusion is missing
* [ARROW-1200](https://issues.apache.org/jira/browse/ARROW-1200) - [C++] DictionaryBuilder should use signed integers for indices
* [ARROW-1201](https://issues.apache.org/jira/browse/ARROW-1201) - [Python] Incomplete Python types cause a core dump when repr-ing
* [ARROW-1203](https://issues.apache.org/jira/browse/ARROW-1203) - [C++] Disallow BinaryBuilder to append byte strings larger than the maximum value of int32\_t
* [ARROW-1205](https://issues.apache.org/jira/browse/ARROW-1205) - C++: Reference to type objects in ArrayLoader may cause segmentation faults.
* [ARROW-1206](https://issues.apache.org/jira/browse/ARROW-1206) - [C++] Enable MSVC builds to work with some compression library support disabled
* [ARROW-1208](https://issues.apache.org/jira/browse/ARROW-1208) - [C++] Toolchain build with ZSTD library from conda-forge failure
* [ARROW-1208](https://issues.apache.org/jira/browse/ARROW-1208) - [C++] Toolchain build with ZSTD library from conda-forge failure
* [ARROW-1215](https://issues.apache.org/jira/browse/ARROW-1215) - [Python] Class methods in API reference
* [ARROW-1216](https://issues.apache.org/jira/browse/ARROW-1216) - Numpy arrays cannot be created from Arrow Buffers on Python 2
* [ARROW-1218](https://issues.apache.org/jira/browse/ARROW-1218) - Arrow doesn't compile if all compression libraries are deactivated
* [ARROW-1222](https://issues.apache.org/jira/browse/ARROW-1222) - [Python] pyarrow.array returns NullArray for array of unsupported Python objects
* [ARROW-1223](https://issues.apache.org/jira/browse/ARROW-1223) - [GLib] Fix function name that returns wrapped object
* [ARROW-1228](https://issues.apache.org/jira/browse/ARROW-1228) - [GLib] Test file name should be the same name as target class
* [ARROW-1233](https://issues.apache.org/jira/browse/ARROW-1233) - [C++] Validate cmake script resolving of 3rd party linked libs from correct location in toolchain build
* [ARROW-1235](https://issues.apache.org/jira/browse/ARROW-1235) - [C++] macOS linker failure with operator<< and std::ostream
* [ARROW-1236](https://issues.apache.org/jira/browse/ARROW-1236) - Library paths in exported pkg-config file are incorrect
* [ARROW-1284](https://issues.apache.org/jira/browse/ARROW-1284) - Windows can't install pyarrow 0.4.1 and 0.5.0



# Apache Arrow 0.4.1 (2017-06-09)

## Bug Fixes

* [ARROW-424](https://issues.apache.org/jira/browse/ARROW-424) - [C++] Threadsafety in arrow/io/hdfs.h
* [ARROW-1039](https://issues.apache.org/jira/browse/ARROW-1039) - Python: pyarrow.Filesystem.read\_parquet causing error if nthreads\>1
* [ARROW-1050](https://issues.apache.org/jira/browse/ARROW-1050) - [C++] Export arrow::ValidateArray
* [ARROW-1051](https://issues.apache.org/jira/browse/ARROW-1051) - [Python] If pyarrow.parquet fails to import due to a shared library ABI conflict, the test\_parquet.py tests silently do not run
* [ARROW-1056](https://issues.apache.org/jira/browse/ARROW-1056) - [Python] Parquet+HDFS test failure due to writing pandas index
* [ARROW-1057](https://issues.apache.org/jira/browse/ARROW-1057) - Fix cmake warning and msvc debug asserts
* [ARROW-1060](https://issues.apache.org/jira/browse/ARROW-1060) - [Python] Add unit test for ARROW-1053
* [ARROW-1062](https://issues.apache.org/jira/browse/ARROW-1062) - [GLib] Examples use old API
* [ARROW-1066](https://issues.apache.org/jira/browse/ARROW-1066) - remove warning on feather for pandas \>= 0.20.1
* [ARROW-1070](https://issues.apache.org/jira/browse/ARROW-1070) - [C++] Feather files for date/time types should be written with the physical types
* [ARROW-1075](https://issues.apache.org/jira/browse/ARROW-1075) - [GLib] Build error on macOS
* [ARROW-1082](https://issues.apache.org/jira/browse/ARROW-1082) - [GLib] Add CI on macOS
* [ARROW-1085](https://issues.apache.org/jira/browse/ARROW-1085) - [java] Follow up on template cleanup. Missing method for IntervalYear
* [ARROW-1086](https://issues.apache.org/jira/browse/ARROW-1086) - [Python] pyarrow 0.4.0 on pypi is missing pxd files
* [ARROW-1088](https://issues.apache.org/jira/browse/ARROW-1088) - [Python] test\_unicode\_filename test fails when unicode filenames aren't supported by system
* [ARROW-1090](https://issues.apache.org/jira/browse/ARROW-1090) - [Python] build\_ext usability
* [ARROW-1091](https://issues.apache.org/jira/browse/ARROW-1091) - Decimal scale and precision are flipped
* [ARROW-1092](https://issues.apache.org/jira/browse/ARROW-1092) - More Decimal and scale flipped follow-up
* [ARROW-1094](https://issues.apache.org/jira/browse/ARROW-1094) - [C++] Incomplete buffer reads in arrow::io::ReadableFile should exactly truncate returned buffer
* [ARROW-1127](https://issues.apache.org/jira/browse/ARROW-1127) - pyarrow 4.1 import failure on Travis


## New Features and Improvements

* [ARROW-897](https://issues.apache.org/jira/browse/ARROW-897) - [GLib] Build arrow-glib as a separate build in the Travis CI build matrix
* [ARROW-986](https://issues.apache.org/jira/browse/ARROW-986) - [Format] Update IPC.md to account for dictionary batches
* [ARROW-990](https://issues.apache.org/jira/browse/ARROW-990) - [JS] Add tslint support for linting TypeScript
* [ARROW-1020](https://issues.apache.org/jira/browse/ARROW-1020) - [Format] Add additional language to Schema.fbs to clarify naive vs. localized Timestamp values
* [ARROW-1034](https://issues.apache.org/jira/browse/ARROW-1034) - [Python] Enable creation of binary wheels on Windows / MSVC
* [ARROW-1049](https://issues.apache.org/jira/browse/ARROW-1049) - [java] vector template cleanup
* [ARROW-1063](https://issues.apache.org/jira/browse/ARROW-1063) - [Website] Blog post and website updates for 0.4.0 release
* [ARROW-1068](https://issues.apache.org/jira/browse/ARROW-1068) - [Python] Create external repo with appveyor.yml configured for building Python wheel installers
* [ARROW-1069](https://issues.apache.org/jira/browse/ARROW-1069) - Add instructions for publishing maven artifacts
* [ARROW-1078](https://issues.apache.org/jira/browse/ARROW-1078) - [Python] Account for PARQUET-967
* [ARROW-1080](https://issues.apache.org/jira/browse/ARROW-1080) - C++: Add tutorial about converting to/from row-wise representation
* [ARROW-1084](https://issues.apache.org/jira/browse/ARROW-1084) - Implementations of BufferAllocator should handle Netty's OutOfDirectMemoryError
* [ARROW-1118](https://issues.apache.org/jira/browse/ARROW-1118) - [Website] Site updates for 0.4.1



# Apache Arrow 0.4.0 (2017-05-22)

## Bug Fixes

* [ARROW-813](https://issues.apache.org/jira/browse/ARROW-813) - [Python] setup.py sdist must also bundle dependent cmake modules
* [ARROW-824](https://issues.apache.org/jira/browse/ARROW-824) - Date and Time Vectors should reflect timezone-less semantics
* [ARROW-856](https://issues.apache.org/jira/browse/ARROW-856) - CmakeError by Unknown compiler.
* [ARROW-909](https://issues.apache.org/jira/browse/ARROW-909) - libjemalloc.so.2: cannot open shared object file:
* [ARROW-939](https://issues.apache.org/jira/browse/ARROW-939) - Fix division by zero for zero-dimensional Tensors
* [ARROW-940](https://issues.apache.org/jira/browse/ARROW-940) - [JS] Generate multiple sets of artifacts
* [ARROW-944](https://issues.apache.org/jira/browse/ARROW-944) - Python: Compat broken for pandas==0.18.1
* [ARROW-948](https://issues.apache.org/jira/browse/ARROW-948) - [GLib] Update C++ header file list
* [ARROW-952](https://issues.apache.org/jira/browse/ARROW-952) - Compilation error on macOS with clang-802.0.42
* [ARROW-958](https://issues.apache.org/jira/browse/ARROW-958) - [Python] Conda build guide still needs ARROW\_HOME, PARQUET\_HOME
* [ARROW-979](https://issues.apache.org/jira/browse/ARROW-979) - [Python] Fix setuptools\_scm version when release tag is not in the master timeline
* [ARROW-991](https://issues.apache.org/jira/browse/ARROW-991) - [Python] PyArray\_SimpleNew should not be used with NPY\_DATETIME
* [ARROW-995](https://issues.apache.org/jira/browse/ARROW-995) - [Website] 0.3 release announce has a typo in reference
* [ARROW-998](https://issues.apache.org/jira/browse/ARROW-998) - [Doc] File format documents incorrect schema location
* [ARROW-1003](https://issues.apache.org/jira/browse/ARROW-1003) - [C++] Hdfs and java dlls fail to load when built for Windows with MSVC
* [ARROW-1004](https://issues.apache.org/jira/browse/ARROW-1004) - ArrowInvalid: Invalid: Python object of type float is not None and is not a string, bool, or date object
* [ARROW-1017](https://issues.apache.org/jira/browse/ARROW-1017) - Python: Table.to\_pandas leaks memory
* [ARROW-1023](https://issues.apache.org/jira/browse/ARROW-1023) - Python: Fix bundling of arrow-cpp for macOS
* [ARROW-1033](https://issues.apache.org/jira/browse/ARROW-1033) - [Python] pytest discovers scripts/test\_leak.py
* [ARROW-1045](https://issues.apache.org/jira/browse/ARROW-1045) - [JAVA] Add support for custom metadata in org.apache.arrow.vector.types.pojo.\*
* [ARROW-1046](https://issues.apache.org/jira/browse/ARROW-1046) - [Python] Conform DataFrame metadata to pandas spec
* [ARROW-1053](https://issues.apache.org/jira/browse/ARROW-1053) - [Python] Memory leak with RecordBatchFileReader
* [ARROW-1054](https://issues.apache.org/jira/browse/ARROW-1054) - [Python] Test suite fails on pandas 0.19.2
* [ARROW-1061](https://issues.apache.org/jira/browse/ARROW-1061) - [C++] Harden decimal parsing against invalid strings
* [ARROW-1064](https://issues.apache.org/jira/browse/ARROW-1064) - ModuleNotFoundError: No module named 'pyarrow.\_parquet'


## New Features and Improvements

* [ARROW-29](https://issues.apache.org/jira/browse/ARROW-29) - C++: Add re2 as optional 3rd-party toolchain dependency
* [ARROW-182](https://issues.apache.org/jira/browse/ARROW-182) - [C++] Remove Array::Validate virtual function and make a separate method
* [ARROW-376](https://issues.apache.org/jira/browse/ARROW-376) - Python: Convert non-range Pandas indices (optionally) to Arrow
* [ARROW-446](https://issues.apache.org/jira/browse/ARROW-446) - [Python] Document NativeFile interfaces, HDFS client in Sphinx
* [ARROW-482](https://issues.apache.org/jira/browse/ARROW-482) - [Java] Provide API access to "custom\_metadata" Field attribute in IPC setting
* [ARROW-532](https://issues.apache.org/jira/browse/ARROW-532) - [Python] Expand pyarrow.parquet documentation for 0.3 release
* [ARROW-579](https://issues.apache.org/jira/browse/ARROW-579) - Python: Provide redistributable pyarrow wheels on OSX
* [ARROW-596](https://issues.apache.org/jira/browse/ARROW-596) - [Python] Add convenience function to convert pandas.DataFrame to pyarrow.Buffer containing a file or stream representation
* [ARROW-629](https://issues.apache.org/jira/browse/ARROW-629) - [JS] Add unit test suite
* [ARROW-714](https://issues.apache.org/jira/browse/ARROW-714) - [C++] Add import\_pyarrow C API in the style of NumPy for thirdparty C++ users
* [ARROW-819](https://issues.apache.org/jira/browse/ARROW-819) - [Python] Define public Cython API
* [ARROW-872](https://issues.apache.org/jira/browse/ARROW-872) - [JS] Read streaming format
* [ARROW-873](https://issues.apache.org/jira/browse/ARROW-873) - [JS] Implement fixed width list type
* [ARROW-874](https://issues.apache.org/jira/browse/ARROW-874) - [JS] Read dictionary-encoded vectors
* [ARROW-881](https://issues.apache.org/jira/browse/ARROW-881) - [Python] Reconstruct Pandas DataFrame indexes using custom\_metadata
* [ARROW-891](https://issues.apache.org/jira/browse/ARROW-891) - [Python] Expand Windows build instructions to not require looking at separate C++ docs
* [ARROW-899](https://issues.apache.org/jira/browse/ARROW-899) - [Docs] Add CHANGELOG for 0.3.0
* [ARROW-901](https://issues.apache.org/jira/browse/ARROW-901) - [Python] Write FixedSizeBinary to Parquet
* [ARROW-913](https://issues.apache.org/jira/browse/ARROW-913) - [Python] Only link jemalloc to the Cython extension where it's needed
* [ARROW-923](https://issues.apache.org/jira/browse/ARROW-923) - [Docs] Generate Changelog for website with JIRA links
* [ARROW-929](https://issues.apache.org/jira/browse/ARROW-929) - Move KEYS file to SVN, remove from git
* [ARROW-943](https://issues.apache.org/jira/browse/ARROW-943) - [GLib] Support running unit tests with source archive
* [ARROW-945](https://issues.apache.org/jira/browse/ARROW-945) - [GLib] Add a Lua example to show Torch integration
* [ARROW-946](https://issues.apache.org/jira/browse/ARROW-946) - [GLib] Use "new" instead of "open" for constructor name
* [ARROW-947](https://issues.apache.org/jira/browse/ARROW-947) - [Python] Improve execution time of manylinux1 build
* [ARROW-953](https://issues.apache.org/jira/browse/ARROW-953) - Use cmake / curl from conda-forge in CI builds
* [ARROW-954](https://issues.apache.org/jira/browse/ARROW-954) - Make it possible to compile Arrow with header-only boost
* [ARROW-956](https://issues.apache.org/jira/browse/ARROW-956) - remove pandas pre-0.20.0 compat
* [ARROW-957](https://issues.apache.org/jira/browse/ARROW-957) - [Doc] Add HDFS and Windows documents to doxygen output
* [ARROW-961](https://issues.apache.org/jira/browse/ARROW-961) - [Python] Rename InMemoryOutputStream to BufferOutputStream
* [ARROW-963](https://issues.apache.org/jira/browse/ARROW-963) - [GLib] Add equal
* [ARROW-967](https://issues.apache.org/jira/browse/ARROW-967) - [GLib] Support initializing array with buffer
* [ARROW-970](https://issues.apache.org/jira/browse/ARROW-970) - [Python] Accidentally calling pyarrow.Table() should not segfault process
* [ARROW-977](https://issues.apache.org/jira/browse/ARROW-977) - [java] Add Timezone aware timestamp vectors
* [ARROW-980](https://issues.apache.org/jira/browse/ARROW-980) - Fix detection of "msvc" COMPILER\_FAMILY
* [ARROW-982](https://issues.apache.org/jira/browse/ARROW-982) - [Website] Improve website front copy to highlight serialization efficiency benefits
* [ARROW-984](https://issues.apache.org/jira/browse/ARROW-984) - [GLib] Add Go examples
* [ARROW-985](https://issues.apache.org/jira/browse/ARROW-985) - [GLib] Update package information
* [ARROW-988](https://issues.apache.org/jira/browse/ARROW-988) - [JS] Add entry to Travis CI matrix
* [ARROW-993](https://issues.apache.org/jira/browse/ARROW-993) - [GLib] Add missing error checks in Go examples
* [ARROW-996](https://issues.apache.org/jira/browse/ARROW-996) - [Website] Add 0.3 release announce in Japanese
* [ARROW-997](https://issues.apache.org/jira/browse/ARROW-997) - [Java] Implement transfer in FixedSizeListVector
* [ARROW-1000](https://issues.apache.org/jira/browse/ARROW-1000) - [GLib] Move install document to Website
* [ARROW-1001](https://issues.apache.org/jira/browse/ARROW-1001) - [GLib] Unify writer files
* [ARROW-1002](https://issues.apache.org/jira/browse/ARROW-1002) - [C++] It is not necessary to add padding after the magic header in the FileWriter implementation
* [ARROW-1008](https://issues.apache.org/jira/browse/ARROW-1008) - [C++] Define abstract interface for stream iteration
* [ARROW-1010](https://issues.apache.org/jira/browse/ARROW-1010) - [Website] Only show English posts in /blog/
* [ARROW-1011](https://issues.apache.org/jira/browse/ARROW-1011) - [Format] Clarify requirements around buffer padding in validity bitmaps
* [ARROW-1014](https://issues.apache.org/jira/browse/ARROW-1014) - 0.4.0 release
* [ARROW-1015](https://issues.apache.org/jira/browse/ARROW-1015) - [Java] Implement schema-level metadata
* [ARROW-1016](https://issues.apache.org/jira/browse/ARROW-1016) - Python: Include C++ headers (optionally) in wheels
* [ARROW-1022](https://issues.apache.org/jira/browse/ARROW-1022) - [Python] Add nthreads option to Feather read method
* [ARROW-1024](https://issues.apache.org/jira/browse/ARROW-1024) - Python: Update build time numpy version to 1.10.1
* [ARROW-1025](https://issues.apache.org/jira/browse/ARROW-1025) - [Website] Improve changelog on website
* [ARROW-1027](https://issues.apache.org/jira/browse/ARROW-1027) - [Python] Allow negative indexing in fields/columns on pyarrow Table and Schema objects
* [ARROW-1028](https://issues.apache.org/jira/browse/ARROW-1028) - [Python] Documentation updates after ARROW-1008
* [ARROW-1029](https://issues.apache.org/jira/browse/ARROW-1029) - [Python] Fix --with-parquet build on Windows, add unit tests to Appveyor
* [ARROW-1030](https://issues.apache.org/jira/browse/ARROW-1030) - Python: Account for library versioning in parquet-cpp
* [ARROW-1031](https://issues.apache.org/jira/browse/ARROW-1031) - [GLib] Support pretty print
* [ARROW-1037](https://issues.apache.org/jira/browse/ARROW-1037) - [GLib] Follow reader name change
* [ARROW-1038](https://issues.apache.org/jira/browse/ARROW-1038) - [GLib] Follow writer name change
* [ARROW-1040](https://issues.apache.org/jira/browse/ARROW-1040) - [GLib] Follow tensor IO
* [ARROW-1044](https://issues.apache.org/jira/browse/ARROW-1044) - [GLib] Support Feather
* [ARROW-1126](https://issues.apache.org/jira/browse/ARROW-1126) - Python: Add function to convert NumPy/Pandas dtypes to Arrow DataTypes



# Apache Arrow 0.3.0 (2017-05-05)

## Bug Fixes

* [ARROW-109](https://issues.apache.org/jira/browse/ARROW-109) - [C++] Investigate recursive data types limit in flatbuffers
* [ARROW-208](https://issues.apache.org/jira/browse/ARROW-208) - Add checkstyle policy to java project
* [ARROW-347](https://issues.apache.org/jira/browse/ARROW-347) - Add method to pass CallBack when creating a transfer pair
* [ARROW-413](https://issues.apache.org/jira/browse/ARROW-413) - DATE type is not specified clearly
* [ARROW-431](https://issues.apache.org/jira/browse/ARROW-431) - [Python] Review GIL release and acquisition in to\_pandas conversion
* [ARROW-443](https://issues.apache.org/jira/browse/ARROW-443) - [Python] Support for converting from strided pandas data in Table.from\_pandas
* [ARROW-451](https://issues.apache.org/jira/browse/ARROW-451) - [C++] Override DataType::Equals for other types with additional metadata
* [ARROW-454](https://issues.apache.org/jira/browse/ARROW-454) - pojo.Field doesn't implement hashCode()
* [ARROW-526](https://issues.apache.org/jira/browse/ARROW-526) - [Format] Update IPC.md to account for File format changes and Streaming format
* [ARROW-565](https://issues.apache.org/jira/browse/ARROW-565) - [C++] Examine "Field::dictionary" member
* [ARROW-570](https://issues.apache.org/jira/browse/ARROW-570) - Determine Java tools JAR location from project metadata
* [ARROW-584](https://issues.apache.org/jira/browse/ARROW-584) - [C++] Fix compiler warnings exposed with -Wconversion
* [ARROW-586](https://issues.apache.org/jira/browse/ARROW-586) - Problem with reading parquet files saved by Apache Spark
* [ARROW-588](https://issues.apache.org/jira/browse/ARROW-588) - [C++] Fix compiler warnings on 32-bit platforms
* [ARROW-595](https://issues.apache.org/jira/browse/ARROW-595) - [Python] StreamReader.schema returns None
* [ARROW-604](https://issues.apache.org/jira/browse/ARROW-604) - Python: boxed Field instances are missing the reference to DataType
* [ARROW-611](https://issues.apache.org/jira/browse/ARROW-611) - [Java] TimeVector TypeLayout is incorrectly specified as 64 bit width
* [ARROW-613](https://issues.apache.org/jira/browse/ARROW-613) - [JS] Implement random-access file format
* [ARROW-617](https://issues.apache.org/jira/browse/ARROW-617) - Time type is not specified clearly
* [ARROW-619](https://issues.apache.org/jira/browse/ARROW-619) - Python: Fix typos in setup.py args and LD\_LIBRARY\_PATH
* [ARROW-619](https://issues.apache.org/jira/browse/ARROW-619) - Python: Fix typos in setup.py args and LD\_LIBRARY\_PATH
* [ARROW-623](https://issues.apache.org/jira/browse/ARROW-623) - segfault with \_\_repr\_\_ of empty Field
* [ARROW-624](https://issues.apache.org/jira/browse/ARROW-624) - [C++] Restore MakePrimitiveArray function
* [ARROW-627](https://issues.apache.org/jira/browse/ARROW-627) - [C++] Compatibility macros for exported extern template class declarations
* [ARROW-628](https://issues.apache.org/jira/browse/ARROW-628) - [Python] Install nomkl metapackage when building parquet-cpp for faster Travis builds
* [ARROW-630](https://issues.apache.org/jira/browse/ARROW-630) - [C++] IPC unloading for BooleanArray does not account for offset
* [ARROW-636](https://issues.apache.org/jira/browse/ARROW-636) - [C++] Add Boost / other system requirements to C++ README
* [ARROW-639](https://issues.apache.org/jira/browse/ARROW-639) - [C++] Invalid offset in slices
* [ARROW-642](https://issues.apache.org/jira/browse/ARROW-642) - [Java] Remove temporary file in java/tools
* [ARROW-644](https://issues.apache.org/jira/browse/ARROW-644) - Python: Cython should be a setup-only requirement
* [ARROW-652](https://issues.apache.org/jira/browse/ARROW-652) - Remove trailing f in merge script output
* [ARROW-654](https://issues.apache.org/jira/browse/ARROW-654) - [C++] Support timezone metadata in file/stream formats
* [ARROW-666](https://issues.apache.org/jira/browse/ARROW-666) - [Python] Error in DictionaryArray \_\_repr\_\_
* [ARROW-667](https://issues.apache.org/jira/browse/ARROW-667) - build of arrow-master/cpp fails with altivec error?
* [ARROW-668](https://issues.apache.org/jira/browse/ARROW-668) - [Python] Convert nanosecond timestamps to pandas.Timestamp when converting from TimestampValue
* [ARROW-671](https://issues.apache.org/jira/browse/ARROW-671) - [GLib] License file isn't installed
* [ARROW-673](https://issues.apache.org/jira/browse/ARROW-673) - [Java] Support additional Time metadata
* [ARROW-677](https://issues.apache.org/jira/browse/ARROW-677) - [java] Fix checkstyle jcl-over-slf4j conflict issue
* [ARROW-678](https://issues.apache.org/jira/browse/ARROW-678) - [GLib] Fix dependenciesfff
* [ARROW-680](https://issues.apache.org/jira/browse/ARROW-680) - [C++] Multiarch support impacts user-supplied install prefix
* [ARROW-682](https://issues.apache.org/jira/browse/ARROW-682) - Add self-validation checks in integration tests
* [ARROW-683](https://issues.apache.org/jira/browse/ARROW-683) - [C++] Support date32 (DateUnit::DAY) in IPC metadata, rename date to date64
* [ARROW-685](https://issues.apache.org/jira/browse/ARROW-685) - [GLib] AX\_CXX\_COMPILE\_STDCXX\_11 error running ./configure
* [ARROW-686](https://issues.apache.org/jira/browse/ARROW-686) - [C++] Account for time metadata changes, add time32 and time64 types
* [ARROW-689](https://issues.apache.org/jira/browse/ARROW-689) - [GLib] Install header files and documents to wrong directories
* [ARROW-691](https://issues.apache.org/jira/browse/ARROW-691) - [Java] Encode dictionary Int type in message format
* [ARROW-697](https://issues.apache.org/jira/browse/ARROW-697) - [Java] Raise appropriate exceptions when encountering large (\> INT32\_MAX) record batches
* [ARROW-699](https://issues.apache.org/jira/browse/ARROW-699) - [C++] Arrow dynamic libraries are missed on run of unit tests on Windows
* [ARROW-702](https://issues.apache.org/jira/browse/ARROW-702) - Fix BitVector.copyFromSafe to reAllocate instead of returning false
* [ARROW-703](https://issues.apache.org/jira/browse/ARROW-703) - Fix issue where setValueCount(0) doesn’t work in the case that we’ve shipped vectors across the wire
* [ARROW-704](https://issues.apache.org/jira/browse/ARROW-704) - Fix bad import caused by conflicting changes
* [ARROW-709](https://issues.apache.org/jira/browse/ARROW-709) - [C++] Restore type comparator for DecimalType
* [ARROW-713](https://issues.apache.org/jira/browse/ARROW-713) - [C++] Fix linking issue with ipc benchmark
* [ARROW-715](https://issues.apache.org/jira/browse/ARROW-715) - Python: Explicit pandas import makes it a hard requirement
* [ARROW-716](https://issues.apache.org/jira/browse/ARROW-716) - error building arrow/python
* [ARROW-720](https://issues.apache.org/jira/browse/ARROW-720) - [java] arrow should not have a dependency on slf4j bridges in compile
* [ARROW-723](https://issues.apache.org/jira/browse/ARROW-723) - Arrow freezes on write if chunk\_size=0
* [ARROW-726](https://issues.apache.org/jira/browse/ARROW-726) - [C++] PyBuffer dtor may segfault if constructor passed an object not exporting buffer protocol
* [ARROW-732](https://issues.apache.org/jira/browse/ARROW-732) - Schema comparison bugs in struct and union types
* [ARROW-736](https://issues.apache.org/jira/browse/ARROW-736) - [Python] Mixed-type object DataFrame columns should not silently coerce to an Arrow type by default
* [ARROW-738](https://issues.apache.org/jira/browse/ARROW-738) - [Python] Fix manylinux1 packaging
* [ARROW-739](https://issues.apache.org/jira/browse/ARROW-739) - Parallel build fails non-deterministically.
* [ARROW-740](https://issues.apache.org/jira/browse/ARROW-740) - FileReader fails for large objects
* [ARROW-747](https://issues.apache.org/jira/browse/ARROW-747) - [C++] Fix spurious warning caused by passing dl to add\_dependencies
* [ARROW-749](https://issues.apache.org/jira/browse/ARROW-749) - [Python] Delete incomplete binary files when writing fails
* [ARROW-753](https://issues.apache.org/jira/browse/ARROW-753) - [Python] Unit tests in arrow/python fail to link on some OS X platforms
* [ARROW-756](https://issues.apache.org/jira/browse/ARROW-756) - [C++] Do not pass -fPIC when compiling with MSVC
* [ARROW-757](https://issues.apache.org/jira/browse/ARROW-757) - [C++] MSVC build fails on googletest when using NMake
* [ARROW-762](https://issues.apache.org/jira/browse/ARROW-762) - Kerberos Problem with PyArrow
* [ARROW-776](https://issues.apache.org/jira/browse/ARROW-776) - [GLib] Cast type is wrong
* [ARROW-777](https://issues.apache.org/jira/browse/ARROW-777) - [Java] Resolve getObject behavior per changes / discussion in ARROW-729
* [ARROW-778](https://issues.apache.org/jira/browse/ARROW-778) - Modify merge tool to work on Windows
* [ARROW-780](https://issues.apache.org/jira/browse/ARROW-780) - PYTHON\_EXECUTABLE Required to be set during build
* [ARROW-781](https://issues.apache.org/jira/browse/ARROW-781) - [Python/C++] Increase reference count for base object?
* [ARROW-783](https://issues.apache.org/jira/browse/ARROW-783) - Integration tests fail for length-0 record batch
* [ARROW-787](https://issues.apache.org/jira/browse/ARROW-787) - [GLib] Fix compilation errors caused by ARROW-758
* [ARROW-789](https://issues.apache.org/jira/browse/ARROW-789) - Fix issue where setValueCount(0) doesn’t work in the case that we’ve shipped vectors across the wire
* [ARROW-793](https://issues.apache.org/jira/browse/ARROW-793) - [GLib] Wrong indent
* [ARROW-794](https://issues.apache.org/jira/browse/ARROW-794) - [C++] Check whether data is contiguous in ipc::WriteTensor
* [ARROW-796](https://issues.apache.org/jira/browse/ARROW-796) - [Java] Checkstyle additions causing build failure in some environments
* [ARROW-797](https://issues.apache.org/jira/browse/ARROW-797) - [Python] Add updated pyarrow.\* public API listing in Sphinx docs
* [ARROW-800](https://issues.apache.org/jira/browse/ARROW-800) - [C++] Boost headers being transitively included in pyarrow
* [ARROW-805](https://issues.apache.org/jira/browse/ARROW-805) - listing empty HDFS directory returns an error instead of returning empty list
* [ARROW-809](https://issues.apache.org/jira/browse/ARROW-809) - C++: Writing sliced record batch to IPC writes the entire array
* [ARROW-812](https://issues.apache.org/jira/browse/ARROW-812) - Pip install pyarrow on mac failed.
* [ARROW-817](https://issues.apache.org/jira/browse/ARROW-817) - [C++] Fix incorrect code comment from ARROW-722
* [ARROW-821](https://issues.apache.org/jira/browse/ARROW-821) - [Python] Extra file \_table\_api.h generated during Python build process
* [ARROW-822](https://issues.apache.org/jira/browse/ARROW-822) - [Python] StreamWriter fails to open with socket as sink
* [ARROW-826](https://issues.apache.org/jira/browse/ARROW-826) - Compilation error on Mac with -DARROW\_PYTHON=on
* [ARROW-829](https://issues.apache.org/jira/browse/ARROW-829) - Python: Parquet: Dictionary encoding is deactivated if column-wise compression was selected
* [ARROW-830](https://issues.apache.org/jira/browse/ARROW-830) - Python: jemalloc is not anymore publicly exposed
* [ARROW-836](https://issues.apache.org/jira/browse/ARROW-836) - Test for timedelta compat with pandas
* [ARROW-839](https://issues.apache.org/jira/browse/ARROW-839) - [C++] Portable alternative to PyDate\_to\_ms function
* [ARROW-847](https://issues.apache.org/jira/browse/ARROW-847) - C++: BUILD\_BYPRODUCTS not specified anymore for gtest
* [ARROW-852](https://issues.apache.org/jira/browse/ARROW-852) - Python: Also set Arrow Library PATHS when detection was done through pkg-config
* [ARROW-853](https://issues.apache.org/jira/browse/ARROW-853) - [Python] It is no longer necessary to modify the RPATH of the Cython extensions on many environments
* [ARROW-858](https://issues.apache.org/jira/browse/ARROW-858) - Remove dependency on boost regex
* [ARROW-866](https://issues.apache.org/jira/browse/ARROW-866) - [Python] Error from file object destructor
* [ARROW-867](https://issues.apache.org/jira/browse/ARROW-867) - [Python] Miscellaneous pyarrow MSVC fixes
* [ARROW-875](https://issues.apache.org/jira/browse/ARROW-875) - Nullable variable length vector fillEmpties() fills an extra value
* [ARROW-879](https://issues.apache.org/jira/browse/ARROW-879) - compat with pandas 0.20.0
* [ARROW-882](https://issues.apache.org/jira/browse/ARROW-882) - [C++] On Windows statically built lib file overwrites lib file of shared build
* [ARROW-883](https://issues.apache.org/jira/browse/ARROW-883) - [JAVA] Introduction of new types has shifted Enumerations
* [ARROW-885](https://issues.apache.org/jira/browse/ARROW-885) - [Python/C++] Decimal test failure on MSVC
* [ARROW-886](https://issues.apache.org/jira/browse/ARROW-886) - VariableLengthVectors don't reAlloc offsets
* [ARROW-887](https://issues.apache.org/jira/browse/ARROW-887) - [format] For backward compatibility, new unit fields must have default values matching previous implied unit
* [ARROW-888](https://issues.apache.org/jira/browse/ARROW-888) - BitVector transfer() does not transfer ownership
* [ARROW-895](https://issues.apache.org/jira/browse/ARROW-895) - Nullable variable length vector lastSet not set correctly
* [ARROW-900](https://issues.apache.org/jira/browse/ARROW-900) - [Python] UnboundLocalError in ParquetDatasetPiece
* [ARROW-903](https://issues.apache.org/jira/browse/ARROW-903) - [GLib] Remove a needless "."
* [ARROW-914](https://issues.apache.org/jira/browse/ARROW-914) - [C++/Python] Fix Decimal ToBytes
* [ARROW-922](https://issues.apache.org/jira/browse/ARROW-922) - Allow Flatbuffers and RapidJSON to be used locally on Windows
* [ARROW-927](https://issues.apache.org/jira/browse/ARROW-927) - C++/Python: Add manylinux1 builds to Travis matrix
* [ARROW-928](https://issues.apache.org/jira/browse/ARROW-928) - Update CMAKE script to detect unsupported msvc compilers versions
* [ARROW-933](https://issues.apache.org/jira/browse/ARROW-933) - [Python] arrow\_python bindings have debug print statement
* [ARROW-934](https://issues.apache.org/jira/browse/ARROW-934) - [GLib] Glib sources missing from result of 02-source.sh
* [ARROW-936](https://issues.apache.org/jira/browse/ARROW-936) - Fix release README
* [ARROW-936](https://issues.apache.org/jira/browse/ARROW-936) - Fix release README
* [ARROW-938](https://issues.apache.org/jira/browse/ARROW-938) - Fix Apache Rat errors from source release build


## New Features and Improvements

* [ARROW-6](https://issues.apache.org/jira/browse/ARROW-6) - Hope to add development document
* [ARROW-39](https://issues.apache.org/jira/browse/ARROW-39) - C++: Logical chunked arrays / columns: conforming to fixed chunk sizes
* [ARROW-52](https://issues.apache.org/jira/browse/ARROW-52) - Set up project blog
* [ARROW-95](https://issues.apache.org/jira/browse/ARROW-95) - Scaffold Main Documentation using asciidoc
* [ARROW-98](https://issues.apache.org/jira/browse/ARROW-98) - Java: API documentation
* [ARROW-99](https://issues.apache.org/jira/browse/ARROW-99) - C++: Explore if RapidCheck may be helpful for testing / worth adding to toolchain
* [ARROW-183](https://issues.apache.org/jira/browse/ARROW-183) - C++: Add storage type to DecimalType
* [ARROW-231](https://issues.apache.org/jira/browse/ARROW-231) - C++: Add typed Resize to PoolBuffer
* [ARROW-281](https://issues.apache.org/jira/browse/ARROW-281) - [C++] IPC/RPC support on Win32 platforms
* [ARROW-316](https://issues.apache.org/jira/browse/ARROW-316) - Finalize Date type
* [ARROW-341](https://issues.apache.org/jira/browse/ARROW-341) - [Python] Making libpyarrow available to third parties
* [ARROW-452](https://issues.apache.org/jira/browse/ARROW-452) - [C++/Python] Merge "Feather" file format implementation
* [ARROW-459](https://issues.apache.org/jira/browse/ARROW-459) - [C++] Implement IPC round trip for DictionaryArray, dictionaries shared across record batches
* [ARROW-483](https://issues.apache.org/jira/browse/ARROW-483) - [C++/Python] Provide access to "custom\_metadata" Field attribute in IPC setting
* [ARROW-491](https://issues.apache.org/jira/browse/ARROW-491) - [C++] Add FixedWidthBinary type
* [ARROW-492](https://issues.apache.org/jira/browse/ARROW-492) - [C++] Add arrow/arrow.h public API
* [ARROW-493](https://issues.apache.org/jira/browse/ARROW-493) - [C++] Allow in-memory array over 2^31 -1 elements but require splitting at IPC / RPC boundaries
* [ARROW-502](https://issues.apache.org/jira/browse/ARROW-502) - [C++/Python] Add MemoryPool implementation that logs allocation activity to std::cout
* [ARROW-510](https://issues.apache.org/jira/browse/ARROW-510) - Add integration tests for date and time types
* [ARROW-518](https://issues.apache.org/jira/browse/ARROW-518) - C++: Make Status::OK method constexpr
* [ARROW-520](https://issues.apache.org/jira/browse/ARROW-520) - [C++] Add STL-compliant allocator that hooks into an arrow::MemoryPool
* [ARROW-528](https://issues.apache.org/jira/browse/ARROW-528) - [Python] Support \_metadata or \_common\_metadata files when reading Parquet directories
* [ARROW-534](https://issues.apache.org/jira/browse/ARROW-534) - [C++] Add IPC tests for date/time types
* [ARROW-539](https://issues.apache.org/jira/browse/ARROW-539) - [Python] Support reading Parquet datasets with standard partition directory schemes
* [ARROW-542](https://issues.apache.org/jira/browse/ARROW-542) - [Java] Implement dictionaries in stream/file encoding
* [ARROW-550](https://issues.apache.org/jira/browse/ARROW-550) - [Format] Add a TensorMessage type
* [ARROW-552](https://issues.apache.org/jira/browse/ARROW-552) - [Python] Add scalar value support for Dictionary type
* [ARROW-557](https://issues.apache.org/jira/browse/ARROW-557) - [Python] Explicitly opt in to HDFS unit tests
* [ARROW-563](https://issues.apache.org/jira/browse/ARROW-563) - C++: Support non-standard gcc version strings
* [ARROW-566](https://issues.apache.org/jira/browse/ARROW-566) - Python: Deterministic position of libarrow in manylinux1 wheels
* [ARROW-568](https://issues.apache.org/jira/browse/ARROW-568) - [C++] Add default implementations for TypeVisitor, ArrayVisitor methods that return NotImplemented
* [ARROW-569](https://issues.apache.org/jira/browse/ARROW-569) - [C++] Set version for \*.pc
* [ARROW-574](https://issues.apache.org/jira/browse/ARROW-574) - Python: Add support for nested Python lists in Pandas conversion
* [ARROW-576](https://issues.apache.org/jira/browse/ARROW-576) - [C++] Complete round trip Union file/stream IPC tests
* [ARROW-577](https://issues.apache.org/jira/browse/ARROW-577) - [C++] Refactor StreamWriter and FileWriter to have private implementations
* [ARROW-578](https://issues.apache.org/jira/browse/ARROW-578) - [C++] Add CMake option to add custom $CXXFLAGS
* [ARROW-580](https://issues.apache.org/jira/browse/ARROW-580) - C++: Also provide jemalloc\_X targets if only a static or shared version is found
* [ARROW-582](https://issues.apache.org/jira/browse/ARROW-582) - [Java] Add Date/Time Support to JSON File
* [ARROW-589](https://issues.apache.org/jira/browse/ARROW-589) - C++: Use system provided shared jemalloc if static is unavailable
* [ARROW-591](https://issues.apache.org/jira/browse/ARROW-591) - [C++] Add round trip testing fixture for JSON format
* [ARROW-593](https://issues.apache.org/jira/browse/ARROW-593) - [C++] Rename ReadableFileInterface to RandomAccessFile
* [ARROW-598](https://issues.apache.org/jira/browse/ARROW-598) - [Python] Add support for converting pyarrow.Buffer to a memoryview with zero copy
* [ARROW-603](https://issues.apache.org/jira/browse/ARROW-603) - [C++] Add RecordBatch::Validate method that at least checks that schema matches the array metadata
* [ARROW-605](https://issues.apache.org/jira/browse/ARROW-605) - [C++] Refactor generic ArrayLoader class, support work for Feather merge
* [ARROW-606](https://issues.apache.org/jira/browse/ARROW-606) - [C++] Upgrade to flatbuffers 1.6.0
* [ARROW-608](https://issues.apache.org/jira/browse/ARROW-608) - [Format] Days since epoch date type
* [ARROW-610](https://issues.apache.org/jira/browse/ARROW-610) - [C++] Win32 compatibility in file.cc
* [ARROW-612](https://issues.apache.org/jira/browse/ARROW-612) - [Java] Field toString should show nullable flag status
* [ARROW-615](https://issues.apache.org/jira/browse/ARROW-615) - Move ByteArrayReadableSeekableByteChannel to vector.util package
* [ARROW-616](https://issues.apache.org/jira/browse/ARROW-616) - [C++] Remove -g flag in release builds
* [ARROW-618](https://issues.apache.org/jira/browse/ARROW-618) - [Python] Implement support for DatetimeTZ custom type from pandas
* [ARROW-620](https://issues.apache.org/jira/browse/ARROW-620) - [C++] Add date/time support to JSON reader/writer for integration testing
* [ARROW-621](https://issues.apache.org/jira/browse/ARROW-621) - [C++] Implement an "inline visitor" template that enables visitor-pattern-like code without virtual function dispatch
* [ARROW-625](https://issues.apache.org/jira/browse/ARROW-625) - [C++] Add time unit to TimeType::ToString
* [ARROW-626](https://issues.apache.org/jira/browse/ARROW-626) - [Python] Enable pyarrow.BufferReader to read from any Python object implementing the buffer/memoryview protocol
* [ARROW-631](https://issues.apache.org/jira/browse/ARROW-631) - [GLib] Import C API (C++ API wrapper) based on GLib from https://github.com/kou/arrow-glib
* [ARROW-632](https://issues.apache.org/jira/browse/ARROW-632) - [Python] Add support for FixedWidthBinary type
* [ARROW-635](https://issues.apache.org/jira/browse/ARROW-635) - [C++] Add JSON read/write support for FixedWidthBinary
* [ARROW-637](https://issues.apache.org/jira/browse/ARROW-637) - [Format] Add time zone metadata to Timestamp type
* [ARROW-646](https://issues.apache.org/jira/browse/ARROW-646) - Cache miniconda packages
* [ARROW-647](https://issues.apache.org/jira/browse/ARROW-647) - [C++] Don't require Boost static libraries to support CentOS 7
* [ARROW-648](https://issues.apache.org/jira/browse/ARROW-648) - [C++] Support multiarch on Debian
* [ARROW-650](https://issues.apache.org/jira/browse/ARROW-650) - [GLib] Follow eadableFileInterface -\> RnadomAccessFile change
* [ARROW-651](https://issues.apache.org/jira/browse/ARROW-651) - [C++] Set shared library version for .deb packages
* [ARROW-655](https://issues.apache.org/jira/browse/ARROW-655) - Implement DecimalArray
* [ARROW-656](https://issues.apache.org/jira/browse/ARROW-656) - [C++] Implement IO interface that can read and write to a fixed-size mutable buffer
* [ARROW-657](https://issues.apache.org/jira/browse/ARROW-657) - [Python] Write and read tensors (with zero copy) into shared memory
* [ARROW-658](https://issues.apache.org/jira/browse/ARROW-658) - [C++] Implement in-memory arrow::Tensor objects
* [ARROW-659](https://issues.apache.org/jira/browse/ARROW-659) - [C++] Add multithreaded memcpy implementation (for hardware where it helps)
* [ARROW-660](https://issues.apache.org/jira/browse/ARROW-660) - [C++] Restore function that can read a complete encapsulated record batch message
* [ARROW-661](https://issues.apache.org/jira/browse/ARROW-661) - [C++] Add a Flatbuffer metadata type that supports array data over 2^31 - 1 elements
* [ARROW-662](https://issues.apache.org/jira/browse/ARROW-662) - [Format] Factor Flatbuffer schema metadata into a Schema.fbs
* [ARROW-663](https://issues.apache.org/jira/browse/ARROW-663) - [Java] Support additional Time metadata + vector value accessors
* [ARROW-664](https://issues.apache.org/jira/browse/ARROW-664) - Make C++ Arrow serialization deterministic
* [ARROW-669](https://issues.apache.org/jira/browse/ARROW-669) - [Python] Attach proper tzinfo when computing boxed scalars for TimestampArray
* [ARROW-670](https://issues.apache.org/jira/browse/ARROW-670) - Arrow 0.3 release
* [ARROW-672](https://issues.apache.org/jira/browse/ARROW-672) - [Format] Bump metadata version for 0.3 release
* [ARROW-674](https://issues.apache.org/jira/browse/ARROW-674) - [Java] Support additional Timestamp timezone metadata
* [ARROW-675](https://issues.apache.org/jira/browse/ARROW-675) - [GLib] Update package metadata
* [ARROW-676](https://issues.apache.org/jira/browse/ARROW-676) - [java] move from MinorType to FieldType in ValueVectors to carry all the relevant type bits
* [ARROW-679](https://issues.apache.org/jira/browse/ARROW-679) - [Format] Change RecordBatch and Field length members from int to long
* [ARROW-681](https://issues.apache.org/jira/browse/ARROW-681) - [C++] Build Arrow on Windows with dynamically linked boost
* [ARROW-684](https://issues.apache.org/jira/browse/ARROW-684) - Python: More informative message when parquet-cpp but not parquet-arrow is available
* [ARROW-687](https://issues.apache.org/jira/browse/ARROW-687) - [C++] Build and run full test suite in Appveyor
* [ARROW-688](https://issues.apache.org/jira/browse/ARROW-688) - [C++] Use CMAKE\_INSTALL\_INCLUDEDIR for consistency
* [ARROW-690](https://issues.apache.org/jira/browse/ARROW-690) - Only send JIRA updates to issues@arrow.apache.org
* [ARROW-698](https://issues.apache.org/jira/browse/ARROW-698) - [C++] Add options to StreamWriter/FileWriter to permit large record batches
* [ARROW-700](https://issues.apache.org/jira/browse/ARROW-700) - Add headroom interface for allocator.
* [ARROW-701](https://issues.apache.org/jira/browse/ARROW-701) - [Java] Support additional Date metadata
* [ARROW-706](https://issues.apache.org/jira/browse/ARROW-706) - [GLib] Add package install document
* [ARROW-707](https://issues.apache.org/jira/browse/ARROW-707) - Python: All none-Pandas column should be converted to NullArray
* [ARROW-708](https://issues.apache.org/jira/browse/ARROW-708) - [C++] Some IPC code simplification, perf analysis
* [ARROW-710](https://issues.apache.org/jira/browse/ARROW-710) - [Python] Enable Feather APIs to read and write using Python file-like objects
* [ARROW-711](https://issues.apache.org/jira/browse/ARROW-711) - [C++] Remove extern template declarations for NumericArray<T\> types
* [ARROW-712](https://issues.apache.org/jira/browse/ARROW-712) - [C++] Implement Array::Accept as inline visitor
* [ARROW-717](https://issues.apache.org/jira/browse/ARROW-717) - [C++] IPC zero-copy round trips for arrow::Tensor
* [ARROW-718](https://issues.apache.org/jira/browse/ARROW-718) - [Python] Expose arrow::Tensor with conversions to/from NumPy arrays
* [ARROW-719](https://issues.apache.org/jira/browse/ARROW-719) - [GLib] Support prepared source archive release
* [ARROW-722](https://issues.apache.org/jira/browse/ARROW-722) - [Python] pandas conversions for new date and time types/metadata
* [ARROW-724](https://issues.apache.org/jira/browse/ARROW-724) - Add "How to Contribute" section to README
* [ARROW-725](https://issues.apache.org/jira/browse/ARROW-725) - [Format] Constant length list type
* [ARROW-727](https://issues.apache.org/jira/browse/ARROW-727) - [Python] Write memoryview-compatible objects in NativeFile.write with zero copy
* [ARROW-728](https://issues.apache.org/jira/browse/ARROW-728) - [C++/Python] Add arrow::Table function for removing a column
* [ARROW-729](https://issues.apache.org/jira/browse/ARROW-729) - [Java] Add vector type for 32-bit date as days since UNIX epoch
* [ARROW-731](https://issues.apache.org/jira/browse/ARROW-731) - [C++] Add shared library related versions to .pc
* [ARROW-733](https://issues.apache.org/jira/browse/ARROW-733) - [C++/Format] Change name of Fixed Width Binary to Fixed \*Size\* Binary for consistency
* [ARROW-734](https://issues.apache.org/jira/browse/ARROW-734) - [Python] Support for pyarrow on Windows / MSVC
* [ARROW-735](https://issues.apache.org/jira/browse/ARROW-735) - [C++] Developer instruction document for MSVC on Windows
* [ARROW-737](https://issues.apache.org/jira/browse/ARROW-737) - [C++] Support obtaining mutable slices of mutable buffers
* [ARROW-741](https://issues.apache.org/jira/browse/ARROW-741) - [Python] Add Python 3.6 to Travis CI
* [ARROW-743](https://issues.apache.org/jira/browse/ARROW-743) - [C++] Consolidate unit tests for code in array.h
* [ARROW-744](https://issues.apache.org/jira/browse/ARROW-744) - [GLib] Re-add an assertion to garrow\_table\_new() test
* [ARROW-745](https://issues.apache.org/jira/browse/ARROW-745) - [C++] Allow use of system cpplint
* [ARROW-746](https://issues.apache.org/jira/browse/ARROW-746) - [GLib] Add garrow\_array\_get\_data\_type()
* [ARROW-748](https://issues.apache.org/jira/browse/ARROW-748) - [Python] Pin runtime library versions in conda-forge packages to force upgrades
* [ARROW-751](https://issues.apache.org/jira/browse/ARROW-751) - [Python] Rename all Cython extensions to "private" status with leading underscore
* [ARROW-752](https://issues.apache.org/jira/browse/ARROW-752) - [Python] Construct pyarrow.DictionaryArray from boxed pyarrow array objects
* [ARROW-754](https://issues.apache.org/jira/browse/ARROW-754) - [GLib] Add garrow\_array\_is\_null()
* [ARROW-755](https://issues.apache.org/jira/browse/ARROW-755) - [GLib] Add garrow\_array\_get\_value\_type()
* [ARROW-758](https://issues.apache.org/jira/browse/ARROW-758) - [C++] Fix compiler warnings on MSVC x64
* [ARROW-761](https://issues.apache.org/jira/browse/ARROW-761) - [Python] Add function to compute the total size of tensor payloads, including metadata and padding
* [ARROW-763](https://issues.apache.org/jira/browse/ARROW-763) - C++: Use \`python-config\` to find libpythonX.X.dylib
* [ARROW-765](https://issues.apache.org/jira/browse/ARROW-765) - [Python] Make generic ArrowException subclass value error
* [ARROW-768](https://issues.apache.org/jira/browse/ARROW-768) - [Java] Change the "boxed" object representation of date and time types
* [ARROW-769](https://issues.apache.org/jira/browse/ARROW-769) - [GLib] Support building without installed Arrow C++
* [ARROW-770](https://issues.apache.org/jira/browse/ARROW-770) - [C++] Move clang-tidy/format config files back to C++ source tree
* [ARROW-771](https://issues.apache.org/jira/browse/ARROW-771) - [Python] Add APIs for reading individual Parquet row groups
* [ARROW-773](https://issues.apache.org/jira/browse/ARROW-773) - [C++] Add function to create arrow::Table with column appended to existing table
* [ARROW-774](https://issues.apache.org/jira/browse/ARROW-774) - [GLib] Remove needless LICENSE.txt copy
* [ARROW-775](https://issues.apache.org/jira/browse/ARROW-775) - [Java] add simple constructors to value vectors
* [ARROW-779](https://issues.apache.org/jira/browse/ARROW-779) - [C++/Python] Raise exception if old metadata encountered
* [ARROW-782](https://issues.apache.org/jira/browse/ARROW-782) - [C++] Change struct to class for objects that meet the criteria in the Google style guide
* [ARROW-788](https://issues.apache.org/jira/browse/ARROW-788) - Possible nondeterminism in Tensor serialization code
* [ARROW-795](https://issues.apache.org/jira/browse/ARROW-795) - [C++] Combine libarrow/libarrow\_io/libarrow\_ipc
* [ARROW-798](https://issues.apache.org/jira/browse/ARROW-798) - [Docs] Publish Format Markdown documents somehow on arrow.apache.org
* [ARROW-802](https://issues.apache.org/jira/browse/ARROW-802) - [GLib] Add read examples
* [ARROW-803](https://issues.apache.org/jira/browse/ARROW-803) - [GLib] Update package repository URL
* [ARROW-804](https://issues.apache.org/jira/browse/ARROW-804) - [GLib] Update build document
* [ARROW-806](https://issues.apache.org/jira/browse/ARROW-806) - [GLib] Support add/remove a column from table
* [ARROW-807](https://issues.apache.org/jira/browse/ARROW-807) - [GLib] Update "Since" tag
* [ARROW-808](https://issues.apache.org/jira/browse/ARROW-808) - [GLib] Remove needless ignore entries
* [ARROW-810](https://issues.apache.org/jira/browse/ARROW-810) - [GLib] Remove io/ipc prefix
* [ARROW-811](https://issues.apache.org/jira/browse/ARROW-811) - [GLib] Add GArrowBuffer
* [ARROW-815](https://issues.apache.org/jira/browse/ARROW-815) - [Java] Allow for expanding underlying buffer size after allocation
* [ARROW-816](https://issues.apache.org/jira/browse/ARROW-816) - [C++] Use conda packages for RapidJSON, Flatbuffers to speed up builds
* [ARROW-818](https://issues.apache.org/jira/browse/ARROW-818) - [Python] Review public pyarrow.\* API completeness and update docs
* [ARROW-820](https://issues.apache.org/jira/browse/ARROW-820) - [C++] Build dependencies for Parquet library without arrow support
* [ARROW-825](https://issues.apache.org/jira/browse/ARROW-825) - [Python] Generalize pyarrow.from\_pylist to accept any object implementing the PySequence protocol
* [ARROW-827](https://issues.apache.org/jira/browse/ARROW-827) - [Python] Variety of Parquet improvements to support Dask integration
* [ARROW-828](https://issues.apache.org/jira/browse/ARROW-828) - [CPP] Document new requirement (libboost-regex-dev) in README.md
* [ARROW-831](https://issues.apache.org/jira/browse/ARROW-831) - Switch from boost::regex to std::regex
* [ARROW-832](https://issues.apache.org/jira/browse/ARROW-832) - [C++] Upgrade thirdparty gtest to 1.8.0
* [ARROW-833](https://issues.apache.org/jira/browse/ARROW-833) - [Python] "Quickstart" build / environment setup guide for Python developers
* [ARROW-841](https://issues.apache.org/jira/browse/ARROW-841) - [Python] Add pyarrow build to Appveyor
* [ARROW-844](https://issues.apache.org/jira/browse/ARROW-844) - [Format] Revise format/README.md to reflect progress reaching a more complete specification
* [ARROW-845](https://issues.apache.org/jira/browse/ARROW-845) - [Python] Sync FindArrow.cmake changes from parquet-cpp
* [ARROW-846](https://issues.apache.org/jira/browse/ARROW-846) - [GLib] Add GArrowTensor, GArrowInt8Tensor and GArrowUInt8Tensor
* [ARROW-848](https://issues.apache.org/jira/browse/ARROW-848) - [Python] Improvements / fixes to conda quickstart guide
* [ARROW-849](https://issues.apache.org/jira/browse/ARROW-849) - [C++] Add optional $ARROW\_BUILD\_TOOLCHAIN environment variable option for configuring build environment
* [ARROW-857](https://issues.apache.org/jira/browse/ARROW-857) - [Python] Automate publishing Python documentation to arrow-site
* [ARROW-859](https://issues.apache.org/jira/browse/ARROW-859) - [C++] Do not build unit tests by default?
* [ARROW-860](https://issues.apache.org/jira/browse/ARROW-860) - [C++] Decide if typed Tensor subclasses are worthwhile
* [ARROW-861](https://issues.apache.org/jira/browse/ARROW-861) - [Python] Move DEVELOPMENT.md to Sphinx docs
* [ARROW-862](https://issues.apache.org/jira/browse/ARROW-862) - [Python] Improve source build instructions in README
* [ARROW-863](https://issues.apache.org/jira/browse/ARROW-863) - [GLib] Use GBytes to implement zero-copy
* [ARROW-864](https://issues.apache.org/jira/browse/ARROW-864) - [GLib] Unify Array files
* [ARROW-865](https://issues.apache.org/jira/browse/ARROW-865) - [Python] Verify Parquet roundtrips for new date/time types
* [ARROW-868](https://issues.apache.org/jira/browse/ARROW-868) - [GLib] Use GBytes to reduce copy
* [ARROW-869](https://issues.apache.org/jira/browse/ARROW-869) - [JS] Rename directory to js/
* [ARROW-871](https://issues.apache.org/jira/browse/ARROW-871) - [GLib] Unify DataType files
* [ARROW-876](https://issues.apache.org/jira/browse/ARROW-876) - [GLib] Unify ArrayBuffer files
* [ARROW-877](https://issues.apache.org/jira/browse/ARROW-877) - [GLib] Add garrow\_array\_get\_null\_bitmap()
* [ARROW-878](https://issues.apache.org/jira/browse/ARROW-878) - [GLib] Add garrow\_binary\_array\_get\_buffer()
* [ARROW-880](https://issues.apache.org/jira/browse/ARROW-880) - [GLib] Add garrow\_primitive\_array\_get\_buffer()
* [ARROW-890](https://issues.apache.org/jira/browse/ARROW-890) - [GLib] Add GArrowMutableBuffer
* [ARROW-892](https://issues.apache.org/jira/browse/ARROW-892) - [GLib] Fix GArrowTensor document
* [ARROW-893](https://issues.apache.org/jira/browse/ARROW-893) - Add GLib document to Web site
* [ARROW-894](https://issues.apache.org/jira/browse/ARROW-894) - [GLib] Add GArrowPoolBuffer
* [ARROW-896](https://issues.apache.org/jira/browse/ARROW-896) - [Docs] Add Jekyll plugin for including rendered Jupyter notebooks on website
* [ARROW-898](https://issues.apache.org/jira/browse/ARROW-898) - [C++] Expand metadata support to field level, provide for sharing instances of KeyValueMetadata
* [ARROW-904](https://issues.apache.org/jira/browse/ARROW-904) - [GLib] Simplify error check codes
* [ARROW-907](https://issues.apache.org/jira/browse/ARROW-907) - C++: Convenience construct Table from schema and arrays
* [ARROW-908](https://issues.apache.org/jira/browse/ARROW-908) - [GLib] Unify OutputStream files
* [ARROW-910](https://issues.apache.org/jira/browse/ARROW-910) - [C++] Write 0-length EOS indicator at end of stream
* [ARROW-916](https://issues.apache.org/jira/browse/ARROW-916) - [GLib] Add GArrowBufferOutputStream
* [ARROW-917](https://issues.apache.org/jira/browse/ARROW-917) - [GLib] Add GArrowBufferReader
* [ARROW-918](https://issues.apache.org/jira/browse/ARROW-918) - [GLib] Use GArrowBuffer for read
* [ARROW-919](https://issues.apache.org/jira/browse/ARROW-919) - [GLib] Use "id" to get type enum value from GArrowDataType
* [ARROW-920](https://issues.apache.org/jira/browse/ARROW-920) - [GLib] Add Lua examples
* [ARROW-925](https://issues.apache.org/jira/browse/ARROW-925) - [GLib] Fix GArrowBufferReader test
* [ARROW-926](https://issues.apache.org/jira/browse/ARROW-926) - Update KEYS to include wesm
* [ARROW-930](https://issues.apache.org/jira/browse/ARROW-930) - javadoc generation fails with java 8
* [ARROW-931](https://issues.apache.org/jira/browse/ARROW-931) - [GLib] Reconstruct input stream
* [ARROW-965](https://issues.apache.org/jira/browse/ARROW-965) - Website updates for 0.3.0 release



# Apache Arrow 0.2.0 (2017-02-18)

## Bug Fixes

* [ARROW-112](https://issues.apache.org/jira/browse/ARROW-112) - [C++]  Style fix for constants/enums
* [ARROW-202](https://issues.apache.org/jira/browse/ARROW-202) - [C++] Integrate with appveyor ci for windows support and get arrow building on windows
* [ARROW-220](https://issues.apache.org/jira/browse/ARROW-220) - [C++] Build conda artifacts in a build environment with better cross-linux ABI compatibility
* [ARROW-224](https://issues.apache.org/jira/browse/ARROW-224) - [C++] Address static linking of boost dependencies
* [ARROW-230](https://issues.apache.org/jira/browse/ARROW-230) - Python: Do not name modules like native ones (i.e. rename pyarrow.io)
* [ARROW-239](https://issues.apache.org/jira/browse/ARROW-239) - [Python] HdfsFile.read called with no arguments should read remainder of file
* [ARROW-261](https://issues.apache.org/jira/browse/ARROW-261) - [C++] Refactor BinaryArray/StringArray classes to not inherit from ListArray
* [ARROW-273](https://issues.apache.org/jira/browse/ARROW-273) - Lists use unsigned offset vectors instead of signed (as defined in the spec)
* [ARROW-275](https://issues.apache.org/jira/browse/ARROW-275) - Add tests for UnionVector in Arrow File
* [ARROW-294](https://issues.apache.org/jira/browse/ARROW-294) - [C++] Do not use fopen / fclose / etc. methods for memory mapped file implementation
* [ARROW-322](https://issues.apache.org/jira/browse/ARROW-322) - [C++] Do not build HDFS IO interface optionally
* [ARROW-323](https://issues.apache.org/jira/browse/ARROW-323) - [Python] Opt-in to PyArrow parquet build rather than skipping silently on failure
* [ARROW-334](https://issues.apache.org/jira/browse/ARROW-334) - [Python] OS X rpath issues on some configurations
* [ARROW-337](https://issues.apache.org/jira/browse/ARROW-337) - UnionListWriter.list() is doing more than it should, this can cause data corruption
* [ARROW-339](https://issues.apache.org/jira/browse/ARROW-339) - Make merge\_arrow\_pr script work with Python 3
* [ARROW-339](https://issues.apache.org/jira/browse/ARROW-339) - Make merge\_arrow\_pr script work with Python 3
* [ARROW-340](https://issues.apache.org/jira/browse/ARROW-340) - [C++] Opening a writeable file on disk that already exists does not truncate to zero
* [ARROW-342](https://issues.apache.org/jira/browse/ARROW-342) - Set Python version on release
* [ARROW-345](https://issues.apache.org/jira/browse/ARROW-345) - libhdfs integration doesn't work for Mac
* [ARROW-346](https://issues.apache.org/jira/browse/ARROW-346) - Python API Documentation
* [ARROW-348](https://issues.apache.org/jira/browse/ARROW-348) - [Python] CMake build type should be configurable on the command line
* [ARROW-349](https://issues.apache.org/jira/browse/ARROW-349) - Six is missing as a requirement in the python setup.py
* [ARROW-351](https://issues.apache.org/jira/browse/ARROW-351) - Time type has no unit
* [ARROW-354](https://issues.apache.org/jira/browse/ARROW-354) - Connot compare an array of empty strings to another
* [ARROW-357](https://issues.apache.org/jira/browse/ARROW-357) - Default Parquet chunk\_size of 64k is too small
* [ARROW-358](https://issues.apache.org/jira/browse/ARROW-358) - [C++] libhdfs can be in non-standard locations in some Hadoop distributions
* [ARROW-362](https://issues.apache.org/jira/browse/ARROW-362) - Python: Calling to\_pandas on a table read from Parquet leaks memory
* [ARROW-371](https://issues.apache.org/jira/browse/ARROW-371) - Python: Table with null timestamp becomes float in pandas
* [ARROW-375](https://issues.apache.org/jira/browse/ARROW-375) - columns parameter in parquet.read\_table() raises KeyError for valid column
* [ARROW-384](https://issues.apache.org/jira/browse/ARROW-384) - Align Java and C++ RecordBatch data and metadata layout
* [ARROW-386](https://issues.apache.org/jira/browse/ARROW-386) - [Java] Respect case of struct / map field names
* [ARROW-387](https://issues.apache.org/jira/browse/ARROW-387) - [C++] arrow::io::BufferReader does not permit shared memory ownership in zero-copy reads
* [ARROW-390](https://issues.apache.org/jira/browse/ARROW-390) - C++: CMake fails on json-integration-test with ARROW\_BUILD\_TESTS=OFF
* [ARROW-392](https://issues.apache.org/jira/browse/ARROW-392) - Fix string/binary integration tests
* [ARROW-393](https://issues.apache.org/jira/browse/ARROW-393) - [JAVA] JSON file reader fails to set the buffer size on String data vector
* [ARROW-395](https://issues.apache.org/jira/browse/ARROW-395) - Arrow file format writes record batches in reverse order.
* [ARROW-398](https://issues.apache.org/jira/browse/ARROW-398) - [Java] Java file format requires bitmaps of all 1's to be written when there are no nulls
* [ARROW-399](https://issues.apache.org/jira/browse/ARROW-399) - [Java] ListVector.loadFieldBuffers ignores the ArrowFieldNode length metadata
* [ARROW-400](https://issues.apache.org/jira/browse/ARROW-400) - [Java] ArrowWriter writes length 0 for Struct types
* [ARROW-401](https://issues.apache.org/jira/browse/ARROW-401) - [Java] Floating point vectors should do an approximate comparison in integration tests
* [ARROW-402](https://issues.apache.org/jira/browse/ARROW-402) - [Java] "refCnt gone negative" error in integration tests
* [ARROW-403](https://issues.apache.org/jira/browse/ARROW-403) - [JAVA] UnionVector: Creating a transfer pair doesn't transfer the schema to destination vector
* [ARROW-404](https://issues.apache.org/jira/browse/ARROW-404) - [Python] Closing an HdfsClient while there are still open file handles results in a crash
* [ARROW-405](https://issues.apache.org/jira/browse/ARROW-405) - [C++] Be less stringent about finding include/hdfs.h in HADOOP\_HOME
* [ARROW-406](https://issues.apache.org/jira/browse/ARROW-406) - [C++] Large HDFS reads must utilize the set file buffer size when making RPCs
* [ARROW-408](https://issues.apache.org/jira/browse/ARROW-408) - [C++/Python] Remove defunct conda recipes
* [ARROW-414](https://issues.apache.org/jira/browse/ARROW-414) - [Java] "Buffer too large to resize to ..." error
* [ARROW-420](https://issues.apache.org/jira/browse/ARROW-420) - Align Date implementation between Java and C++
* [ARROW-421](https://issues.apache.org/jira/browse/ARROW-421) - [Python] Zero-copy buffers read by pyarrow::PyBytesReader must retain a reference to the parent PyBytes to avoid premature garbage collection issues
* [ARROW-422](https://issues.apache.org/jira/browse/ARROW-422) - C++: IPC should depend on rapidjson\_ep if RapidJSON is vendored
* [ARROW-429](https://issues.apache.org/jira/browse/ARROW-429) - git-archive SHA-256 checksums are changing
* [ARROW-433](https://issues.apache.org/jira/browse/ARROW-433) - [Python] Date conversion is locale-dependent
* [ARROW-434](https://issues.apache.org/jira/browse/ARROW-434) - Segfaults and encoding issues in Python Parquet reads
* [ARROW-435](https://issues.apache.org/jira/browse/ARROW-435) - C++: Spelling mistake in if(RAPIDJSON\_VENDORED)
* [ARROW-437](https://issues.apache.org/jira/browse/ARROW-437) - [C++] clang compiler warnings from overridden virtual functions
* [ARROW-445](https://issues.apache.org/jira/browse/ARROW-445) - C++: arrow\_ipc is built before arrow/ipc/Message\_generated.h was generated
* [ARROW-447](https://issues.apache.org/jira/browse/ARROW-447) - Python: Align scalar/pylist string encoding with pandas' one.
* [ARROW-455](https://issues.apache.org/jira/browse/ARROW-455) - [C++] BufferOutputStream dtor does not call Close()
* [ARROW-469](https://issues.apache.org/jira/browse/ARROW-469) - C++: Add option so that resize doesn't decrease the capacity
* [ARROW-481](https://issues.apache.org/jira/browse/ARROW-481) - [Python] Fix Python 2.7 regression in patch for PARQUET-472
* [ARROW-486](https://issues.apache.org/jira/browse/ARROW-486) - [C++] arrow::io::MemoryMappedFile can't be casted to arrow::io::FileInterface
* [ARROW-487](https://issues.apache.org/jira/browse/ARROW-487) - Python: ConvertTableToPandas segfaults if ObjectBlock::Write fails
* [ARROW-494](https://issues.apache.org/jira/browse/ARROW-494) - [C++] When MemoryMappedFile is destructed, memory is unmapped even if buffer referecnes still exist
* [ARROW-499](https://issues.apache.org/jira/browse/ARROW-499) - Update file serialization to use streaming serialization format
* [ARROW-505](https://issues.apache.org/jira/browse/ARROW-505) - [C++] Fix compiler warnings in release mode
* [ARROW-511](https://issues.apache.org/jira/browse/ARROW-511) - [Python] List[T] conversions not implemented for single arrays
* [ARROW-513](https://issues.apache.org/jira/browse/ARROW-513) - [C++] Fix Appveyor build
* [ARROW-516](https://issues.apache.org/jira/browse/ARROW-516) - Building pyarrow with parquet
* [ARROW-519](https://issues.apache.org/jira/browse/ARROW-519) - [C++] Missing vtable in libarrow.dylib on Xcode 6.4
* [ARROW-523](https://issues.apache.org/jira/browse/ARROW-523) - Python: Account for changes in PARQUET-834
* [ARROW-533](https://issues.apache.org/jira/browse/ARROW-533) - [C++] arrow::TimestampArray / TimeArray has a broken constructor
* [ARROW-535](https://issues.apache.org/jira/browse/ARROW-535) - [Python] Add type mapping for NPY\_LONGLONG
* [ARROW-537](https://issues.apache.org/jira/browse/ARROW-537) - [C++] StringArray/BinaryArray comparisons may be incorrect when values with non-zero length are null
* [ARROW-540](https://issues.apache.org/jira/browse/ARROW-540) - [C++] Fix build in aftermath of ARROW-33
* [ARROW-543](https://issues.apache.org/jira/browse/ARROW-543) - C++: Lazily computed null\_counts counts number of non-null entries
* [ARROW-544](https://issues.apache.org/jira/browse/ARROW-544) - [C++] ArrayLoader::LoadBinary fails for length-0 arrays
* [ARROW-545](https://issues.apache.org/jira/browse/ARROW-545) - [Python] Ignore files without .parq or .parquet prefix when reading directory of files
* [ARROW-548](https://issues.apache.org/jira/browse/ARROW-548) - [Python] Add nthreads option to pyarrow.Filesystem.read\_parquet
* [ARROW-551](https://issues.apache.org/jira/browse/ARROW-551) - C++: Construction of Column with nullptr Array segfaults
* [ARROW-556](https://issues.apache.org/jira/browse/ARROW-556) - [Integration] Can not run Integration tests if different cpp build path
* [ARROW-561](https://issues.apache.org/jira/browse/ARROW-561) - Update java & python dependencies to improve downstream packaging experience
* [ARROW-562](https://issues.apache.org/jira/browse/ARROW-562) - Mockito should be in test scope


## New Features and Improvements

* [ARROW-33](https://issues.apache.org/jira/browse/ARROW-33) - C++: Implement zero-copy array slicing
* [ARROW-81](https://issues.apache.org/jira/browse/ARROW-81) - [Format] Add a Category logical type (distinct from dictionary-encoding)
* [ARROW-96](https://issues.apache.org/jira/browse/ARROW-96) - C++: API documentation using Doxygen
* [ARROW-97](https://issues.apache.org/jira/browse/ARROW-97) - Python: API documentation via sphinx-apidoc
* [ARROW-108](https://issues.apache.org/jira/browse/ARROW-108) - [C++] Add IPC round trip for union types
* [ARROW-189](https://issues.apache.org/jira/browse/ARROW-189) - C++: Use ExternalProject to build thirdparty dependencies
* [ARROW-191](https://issues.apache.org/jira/browse/ARROW-191) - Python: Provide infrastructure for manylinux1 wheels
* [ARROW-221](https://issues.apache.org/jira/browse/ARROW-221) - Add switch for writing Parquet 1.0 compatible logical types
* [ARROW-227](https://issues.apache.org/jira/browse/ARROW-227) - [C++/Python] Hook arrow\_io generic reader / writer interface into arrow\_parquet
* [ARROW-228](https://issues.apache.org/jira/browse/ARROW-228) - [Python] Create an Arrow-cpp-compatible interface for reading bytes from Python file-like objects
* [ARROW-240](https://issues.apache.org/jira/browse/ARROW-240) - Installation instructions for pyarrow
* [ARROW-243](https://issues.apache.org/jira/browse/ARROW-243) - [C++] Add "driver" option to HdfsClient to choose between libhdfs and libhdfs3 at runtime
* [ARROW-268](https://issues.apache.org/jira/browse/ARROW-268) - [C++] Flesh out union implementation to have all required methods for IPC
* [ARROW-303](https://issues.apache.org/jira/browse/ARROW-303) - [C++] Also build static libraries for leaf libraries
* [ARROW-312](https://issues.apache.org/jira/browse/ARROW-312) - [Python] Provide Python API to read/write the Arrow IPC file format
* [ARROW-312](https://issues.apache.org/jira/browse/ARROW-312) - [Python] Provide Python API to read/write the Arrow IPC file format
* [ARROW-317](https://issues.apache.org/jira/browse/ARROW-317) - [C++] Implement zero-copy Slice method on arrow::Buffer that retains reference to parent
* [ARROW-327](https://issues.apache.org/jira/browse/ARROW-327) - [Python] Remove conda builds from Travis CI processes
* [ARROW-328](https://issues.apache.org/jira/browse/ARROW-328) - [C++] Return shared\_ptr by value instead of const-ref?
* [ARROW-330](https://issues.apache.org/jira/browse/ARROW-330) - [C++] CMake functions to simplify shared / static library configuration
* [ARROW-332](https://issues.apache.org/jira/browse/ARROW-332) - [Python] Add helper function to convert RecordBatch to pandas.DataFrame
* [ARROW-333](https://issues.apache.org/jira/browse/ARROW-333) - Make writers update their internal schema even when no data is written.
* [ARROW-335](https://issues.apache.org/jira/browse/ARROW-335) - Improve Type apis and toString() by encapsulating flatbuffers better
* [ARROW-336](https://issues.apache.org/jira/browse/ARROW-336) - Run Apache Rat in Travis builds
* [ARROW-338](https://issues.apache.org/jira/browse/ARROW-338) - [C++] Refactor IPC vector "loading" and "unloading" to be based on cleaner visitor pattern
* [ARROW-344](https://issues.apache.org/jira/browse/ARROW-344) - Instructions for building with conda
* [ARROW-350](https://issues.apache.org/jira/browse/ARROW-350) - Add Kerberos support to HDFS shim
* [ARROW-353](https://issues.apache.org/jira/browse/ARROW-353) - Arrow release 0.2
* [ARROW-355](https://issues.apache.org/jira/browse/ARROW-355) - Add tests for serialising arrays of empty strings to Parquet
* [ARROW-356](https://issues.apache.org/jira/browse/ARROW-356) - Add documentation about reading Parquet
* [ARROW-359](https://issues.apache.org/jira/browse/ARROW-359) - Need to document ARROW\_LIBHDFS\_DIR
* [ARROW-360](https://issues.apache.org/jira/browse/ARROW-360) - C++: Add method to shrink PoolBuffer using realloc
* [ARROW-361](https://issues.apache.org/jira/browse/ARROW-361) - Python: Support reading a column-selection from Parquet files
* [ARROW-363](https://issues.apache.org/jira/browse/ARROW-363) - Set up Java/C++ integration test harness
* [ARROW-365](https://issues.apache.org/jira/browse/ARROW-365) - Python: Provide Array.to\_pandas()
* [ARROW-366](https://issues.apache.org/jira/browse/ARROW-366) - [java] implement Dictionary vector
* [ARROW-367](https://issues.apache.org/jira/browse/ARROW-367) - [java] converter csv/json <=\> Arrow file format for Integration tests
* [ARROW-368](https://issues.apache.org/jira/browse/ARROW-368) - Document use of LD\_LIBRARY\_PATH when using Python
* [ARROW-369](https://issues.apache.org/jira/browse/ARROW-369) - [Python] Add ability to convert multiple record batches at once to pandas
* [ARROW-370](https://issues.apache.org/jira/browse/ARROW-370) - Python: Pandas conversion from \`datetime.date\` columns
* [ARROW-372](https://issues.apache.org/jira/browse/ARROW-372) - Create JSON arrow file format for integration tests
* [ARROW-373](https://issues.apache.org/jira/browse/ARROW-373) - [C++] Implement C++ version of JSON file format for testing
* [ARROW-374](https://issues.apache.org/jira/browse/ARROW-374) - Python: clarify unicode vs. binary in API
* [ARROW-377](https://issues.apache.org/jira/browse/ARROW-377) - Python: Add support for conversion of Pandas.Categorical
* [ARROW-379](https://issues.apache.org/jira/browse/ARROW-379) - Python: Use setuptools\_scm/setuptools\_scm\_git\_archive to provide the version number
* [ARROW-380](https://issues.apache.org/jira/browse/ARROW-380) - [Java] optimize null count when serializing vectors.
* [ARROW-381](https://issues.apache.org/jira/browse/ARROW-381) - [C++] Simplify primitive array type builders to use a default type singleton
* [ARROW-382](https://issues.apache.org/jira/browse/ARROW-382) - Python: Extend API documentation
* [ARROW-383](https://issues.apache.org/jira/browse/ARROW-383) - [C++] Implement C++ version of ARROW-367 integration test validator
* [ARROW-389](https://issues.apache.org/jira/browse/ARROW-389) - Python: Write Parquet files to pyarrow.io.NativeFile objects
* [ARROW-394](https://issues.apache.org/jira/browse/ARROW-394) - Add integration tests for boolean, list, struct, and other basic types
* [ARROW-396](https://issues.apache.org/jira/browse/ARROW-396) - Python: Add pyarrow.schema.Schema.equals
* [ARROW-409](https://issues.apache.org/jira/browse/ARROW-409) - Python: Change pyarrow.Table.dataframe\_from\_batches API to create Table instead
* [ARROW-410](https://issues.apache.org/jira/browse/ARROW-410) - [C++] Add Flush method to arrow::io::OutputStream
* [ARROW-411](https://issues.apache.org/jira/browse/ARROW-411) - [Java] Move Intergration.compare and Intergration.compareSchemas to a public utils class
* [ARROW-415](https://issues.apache.org/jira/browse/ARROW-415) - C++: Add Equals implementation to compare Tables
* [ARROW-416](https://issues.apache.org/jira/browse/ARROW-416) - C++: Add Equals implementation to compare Columns
* [ARROW-417](https://issues.apache.org/jira/browse/ARROW-417) - C++: Add Equals implementation to compare ChunkedArrays
* [ARROW-418](https://issues.apache.org/jira/browse/ARROW-418) - [C++] Consolidate array container and builder code, remove arrow/types
* [ARROW-419](https://issues.apache.org/jira/browse/ARROW-419) - [C++] Promote util/{status.h, buffer.h, memory-pool.h} to top level of arrow/ source directory
* [ARROW-423](https://issues.apache.org/jira/browse/ARROW-423) - C++: Define BUILD\_BYPRODUCTS in external project to support non-make CMake generators
* [ARROW-425](https://issues.apache.org/jira/browse/ARROW-425) - Python: Expose a C function to convert arrow::Table to pyarrow.Table
* [ARROW-426](https://issues.apache.org/jira/browse/ARROW-426) - Python: Conversion from pyarrow.Array to a Python list
* [ARROW-427](https://issues.apache.org/jira/browse/ARROW-427) - [C++] Implement dictionary-encoded array container
* [ARROW-428](https://issues.apache.org/jira/browse/ARROW-428) - [Python] Deserialize from Arrow record batches to pandas in parallel using a thread pool
* [ARROW-430](https://issues.apache.org/jira/browse/ARROW-430) - Python: Better version handling
* [ARROW-432](https://issues.apache.org/jira/browse/ARROW-432) - [Python] Avoid unnecessary memory copy in to\_pandas conversion by using low-level pandas internals APIs
* [ARROW-438](https://issues.apache.org/jira/browse/ARROW-438) - [Python] Concatenate Table instances with equal schemas
* [ARROW-440](https://issues.apache.org/jira/browse/ARROW-440) - [C++] Support pkg-config
* [ARROW-441](https://issues.apache.org/jira/browse/ARROW-441) - [Python] Expose Arrow's file and memory map classes as NativeFile subclasses
* [ARROW-442](https://issues.apache.org/jira/browse/ARROW-442) - [Python] Add public Python API to inspect Parquet file metadata
* [ARROW-444](https://issues.apache.org/jira/browse/ARROW-444) - [Python] Avoid unnecessary memory copies from use of PyBytes\_\* C APIs
* [ARROW-449](https://issues.apache.org/jira/browse/ARROW-449) - Python: Conversion from pyarrow.{Table,RecordBatch} to a Python dict
* [ARROW-450](https://issues.apache.org/jira/browse/ARROW-450) - Python: Fixes for PARQUET-818
* [ARROW-456](https://issues.apache.org/jira/browse/ARROW-456) - C++: Add jemalloc based MemoryPool
* [ARROW-457](https://issues.apache.org/jira/browse/ARROW-457) - Python: Better control over memory pool
* [ARROW-458](https://issues.apache.org/jira/browse/ARROW-458) - [Python] Expose jemalloc MemoryPool
* [ARROW-461](https://issues.apache.org/jira/browse/ARROW-461) - [Python] Implement conversion between arrow::DictionaryArray and pandas.Categorical
* [ARROW-463](https://issues.apache.org/jira/browse/ARROW-463) - C++: Support jemalloc 4.x
* [ARROW-466](https://issues.apache.org/jira/browse/ARROW-466) - C++: ExternalProject for jemalloc
* [ARROW-467](https://issues.apache.org/jira/browse/ARROW-467) - [Python] Run parquet-cpp unit tests in Travis CI
* [ARROW-468](https://issues.apache.org/jira/browse/ARROW-468) - Python: Conversion of nested data in pd.DataFrames to/from Arrow structures
* [ARROW-470](https://issues.apache.org/jira/browse/ARROW-470) - [Python] Add "FileSystem" abstraction to access directories of files in a uniform way
* [ARROW-471](https://issues.apache.org/jira/browse/ARROW-471) - [Python] Enable ParquetFile to pass down separately-obtained file metadata
* [ARROW-472](https://issues.apache.org/jira/browse/ARROW-472) - [Python] Expose parquet::{SchemaDescriptor, ColumnDescriptor}::Equals
* [ARROW-474](https://issues.apache.org/jira/browse/ARROW-474) - Create an Arrow streaming file fomat
* [ARROW-475](https://issues.apache.org/jira/browse/ARROW-475) - [Python] High level support for reading directories of Parquet files (as a single Arrow table) from supported file system interfaces
* [ARROW-476](https://issues.apache.org/jira/browse/ARROW-476) - [Integration] Add integration tests for Binary / Varbytes type
* [ARROW-477](https://issues.apache.org/jira/browse/ARROW-477) - [Java] Add support for second/microsecond/nanosecond timestamps in-memory and in IPC/JSON layer
* [ARROW-478](https://issues.apache.org/jira/browse/ARROW-478) - [Python] Accept a PyBytes object in the pyarrow.io.BufferReader ctor
* [ARROW-479](https://issues.apache.org/jira/browse/ARROW-479) - Python: Test for expected schema in Pandas conversion
* [ARROW-484](https://issues.apache.org/jira/browse/ARROW-484) - Add more detail about what of technology can be found in the Arrow implementations to README
* [ARROW-485](https://issues.apache.org/jira/browse/ARROW-485) - [Java] Users are required to initialize VariableLengthVectors.offsetVector before calling VariableLengthVectors.mutator.getSafe
* [ARROW-490](https://issues.apache.org/jira/browse/ARROW-490) - Python: Update manylinux1 build scripts
* [ARROW-495](https://issues.apache.org/jira/browse/ARROW-495) - [C++] Add C++ implementation of streaming serialized format
* [ARROW-497](https://issues.apache.org/jira/browse/ARROW-497) - [Java] Integration test harness for streaming format
* [ARROW-498](https://issues.apache.org/jira/browse/ARROW-498) - [C++] Integration test harness for streaming format
* [ARROW-503](https://issues.apache.org/jira/browse/ARROW-503) - [Python] Interface to streaming binary format
* [ARROW-506](https://issues.apache.org/jira/browse/ARROW-506) - Implement Arrow Echo server for integration testing
* [ARROW-508](https://issues.apache.org/jira/browse/ARROW-508) - [C++] Make file/memory-mapped file interfaces threadsafe
* [ARROW-509](https://issues.apache.org/jira/browse/ARROW-509) - [Python] Add support for PARQUET-835 (parallel column reads)
* [ARROW-512](https://issues.apache.org/jira/browse/ARROW-512) - C++: Add method to check for primitive types
* [ARROW-514](https://issues.apache.org/jira/browse/ARROW-514) - [Python] Accept pyarrow.io.Buffer as input to StreamReader, FileReader classes
* [ARROW-515](https://issues.apache.org/jira/browse/ARROW-515) - [Python] Add StreamReader/FileReader methods that read all record batches as a Table
* [ARROW-521](https://issues.apache.org/jira/browse/ARROW-521) - [C++/Python] Track peak memory use in default MemoryPool
* [ARROW-524](https://issues.apache.org/jira/browse/ARROW-524) - [java] provide apis to access nested vectors and buffers
* [ARROW-525](https://issues.apache.org/jira/browse/ARROW-525) - Python: Add more documentation to the package
* [ARROW-527](https://issues.apache.org/jira/browse/ARROW-527) - clean drill-module.conf file
* [ARROW-529](https://issues.apache.org/jira/browse/ARROW-529) - Python: Add jemalloc and Python 3.6 to manylinux1 build
* [ARROW-531](https://issues.apache.org/jira/browse/ARROW-531) - Python: Document jemalloc, extend Pandas section, add Getting Involved
* [ARROW-538](https://issues.apache.org/jira/browse/ARROW-538) - [C++] Set up AddressSanitizer (ASAN) builds
* [ARROW-546](https://issues.apache.org/jira/browse/ARROW-546) - Python: Account for changes in PARQUET-867
* [ARROW-547](https://issues.apache.org/jira/browse/ARROW-547) - [Python] Expose Array::Slice and RecordBatch::Slice
* [ARROW-553](https://issues.apache.org/jira/browse/ARROW-553) - C++: Faster valid bitmap building
* [ARROW-558](https://issues.apache.org/jira/browse/ARROW-558) - Add KEYS files



# Apache Arrow 0.1.0 (2016-10-10)

## New Features and Improvements

* [ARROW-1](https://issues.apache.org/jira/browse/ARROW-1) - Import Initial Codebase
* [ARROW-2](https://issues.apache.org/jira/browse/ARROW-2) - Post Simple Website
* [ARROW-3](https://issues.apache.org/jira/browse/ARROW-3) - Post Initial Arrow Format Spec
* [ARROW-4](https://issues.apache.org/jira/browse/ARROW-4) - Initial Arrow CPP Implementation
* [ARROW-7](https://issues.apache.org/jira/browse/ARROW-7) - Add Python library build toolchain
* [ARROW-8](https://issues.apache.org/jira/browse/ARROW-8) - Set up Travis CI
* [ARROW-9](https://issues.apache.org/jira/browse/ARROW-9) - Rename some unchanged "Drill" to "Arrow"
* [ARROW-9](https://issues.apache.org/jira/browse/ARROW-9) - Rename some unchanged "Drill" to "Arrow"
* [ARROW-10](https://issues.apache.org/jira/browse/ARROW-10) - Fix mismatch of javadoc names and method parameters
* [ARROW-11](https://issues.apache.org/jira/browse/ARROW-11) - Mirror JIRA activity to dev@arrow.apache.org
* [ARROW-13](https://issues.apache.org/jira/browse/ARROW-13) - Add PR merge tool similar to that used in Parquet
* [ARROW-14](https://issues.apache.org/jira/browse/ARROW-14) - Add JIRA components
* [ARROW-15](https://issues.apache.org/jira/browse/ARROW-15) - Fix a naming typo for memory.AllocationManager.AllocationOutcome
* [ARROW-19](https://issues.apache.org/jira/browse/ARROW-19) - C++: Externalize memory allocations and add a MemoryPool abstract interface to builder classes
* [ARROW-20](https://issues.apache.org/jira/browse/ARROW-20) - C++: Add null count member to Array containers, remove nullable member
* [ARROW-21](https://issues.apache.org/jira/browse/ARROW-21) - C++: Add in-memory schema metadata container
* [ARROW-22](https://issues.apache.org/jira/browse/ARROW-22) - C++: Add schema adapter routines for converting flat Parquet schemas to in-memory Arrow schemas
* [ARROW-23](https://issues.apache.org/jira/browse/ARROW-23) - C++: Add logical "Column" container for chunked data
* [ARROW-24](https://issues.apache.org/jira/browse/ARROW-24) - C++: Add logical "Table" container
* [ARROW-26](https://issues.apache.org/jira/browse/ARROW-26) - C++: Add developer instructions for building parquet-cpp integration
* [ARROW-28](https://issues.apache.org/jira/browse/ARROW-28) - C++: Add google/benchmark to the 3rd-party build toolchain
* [ARROW-30](https://issues.apache.org/jira/browse/ARROW-30) - Python: pandas/NumPy to/from Arrow conversion routines
* [ARROW-31](https://issues.apache.org/jira/browse/ARROW-31) - Python: basic PyList <-\> Arrow marshaling code
* [ARROW-35](https://issues.apache.org/jira/browse/ARROW-35) - Add a short call-to-action / how-to-get-involved to the main README.md
* [ARROW-37](https://issues.apache.org/jira/browse/ARROW-37) - C++: Represent boolean array data in bit-packed form
* [ARROW-42](https://issues.apache.org/jira/browse/ARROW-42) - Python: Add to Travis CI build
* [ARROW-43](https://issues.apache.org/jira/browse/ARROW-43) - Python: Add rudimentary console \_\_repr\_\_ for array types
* [ARROW-44](https://issues.apache.org/jira/browse/ARROW-44) - Python: Implement basic object model for scalar values (i.e. results of arrow\_arr[i])
* [ARROW-48](https://issues.apache.org/jira/browse/ARROW-48) - Python: Add Schema object wrapper
* [ARROW-49](https://issues.apache.org/jira/browse/ARROW-49) - Python: Add Column and Table wrapper interface
* [ARROW-50](https://issues.apache.org/jira/browse/ARROW-50) - C++: Enable library builds for 3rd-party users without having to build thirdparty googletest
* [ARROW-53](https://issues.apache.org/jira/browse/ARROW-53) - Python: Fix RPATH and add source installation instructions
* [ARROW-54](https://issues.apache.org/jira/browse/ARROW-54) - Python: rename package to "pyarrow"
* [ARROW-56](https://issues.apache.org/jira/browse/ARROW-56) - Format: Specify LSB bit ordering in bit arrays
* [ARROW-57](https://issues.apache.org/jira/browse/ARROW-57) - Format: Draft data headers IDL for data interchange
* [ARROW-58](https://issues.apache.org/jira/browse/ARROW-58) - Format: Draft type metadata ("schemas") IDL
* [ARROW-59](https://issues.apache.org/jira/browse/ARROW-59) - Python: Boolean data support for builtin data structures
* [ARROW-60](https://issues.apache.org/jira/browse/ARROW-60) - C++: Struct type builder API
* [ARROW-64](https://issues.apache.org/jira/browse/ARROW-64) - Add zsh support to C++ build scripts
* [ARROW-66](https://issues.apache.org/jira/browse/ARROW-66) - Maybe some missing steps in installation guide
* [ARROW-67](https://issues.apache.org/jira/browse/ARROW-67) - C++: Draft type metadata conversion to/from IPC representation
* [ARROW-68](https://issues.apache.org/jira/browse/ARROW-68) - Update setup\_build\_env and third-party script to be more userfriendly
* [ARROW-70](https://issues.apache.org/jira/browse/ARROW-70) - C++: Add "lite" DCHECK macros used in parquet-cpp
* [ARROW-71](https://issues.apache.org/jira/browse/ARROW-71) - C++: Add script to run clang-tidy on codebase
* [ARROW-73](https://issues.apache.org/jira/browse/ARROW-73) - Support CMake 2.8
* [ARROW-76](https://issues.apache.org/jira/browse/ARROW-76) - Revise format document to include null count, defer non-nullable arrays to the domain of metadata
* [ARROW-78](https://issues.apache.org/jira/browse/ARROW-78) - C++: Add constructor for DecimalType
* [ARROW-79](https://issues.apache.org/jira/browse/ARROW-79) - Python: Add benchmarks
* [ARROW-82](https://issues.apache.org/jira/browse/ARROW-82) - C++: Implement IPC exchange for List types
* [ARROW-85](https://issues.apache.org/jira/browse/ARROW-85) - C++: memcmp can be avoided in Equal when comparing with the same Buffer
* [ARROW-86](https://issues.apache.org/jira/browse/ARROW-86) - Python: Implement zero-copy Arrow-to-Pandas conversion
* [ARROW-87](https://issues.apache.org/jira/browse/ARROW-87) - Implement Decimal schema conversion for all ways supported in Parquet
* [ARROW-89](https://issues.apache.org/jira/browse/ARROW-89) - Python: Add benchmarks for Arrow<-\>Pandas conversion
* [ARROW-90](https://issues.apache.org/jira/browse/ARROW-90) - Apache Arrow cpp code does not support power architecture
* [ARROW-91](https://issues.apache.org/jira/browse/ARROW-91) - C++: First draft of an adapter class for parquet-cpp's ParquetFileReader that produces Arrow table/row batch objects
* [ARROW-92](https://issues.apache.org/jira/browse/ARROW-92) - C++: Arrow to Parquet Schema conversion
* [ARROW-100](https://issues.apache.org/jira/browse/ARROW-100) - [C++] Computing RowBatch size
* [ARROW-101](https://issues.apache.org/jira/browse/ARROW-101) - Fix java warnings emitted by java compiler
* [ARROW-102](https://issues.apache.org/jira/browse/ARROW-102) - travis-ci support for java project
* [ARROW-106](https://issues.apache.org/jira/browse/ARROW-106) - Add IPC round trip for string types (string, char, varchar, binary)
* [ARROW-107](https://issues.apache.org/jira/browse/ARROW-107) - [C++] add ipc round trip for struct types
* [ARROW-190](https://issues.apache.org/jira/browse/ARROW-190) - Python: Provide installable sdist builds
* [ARROW-196](https://issues.apache.org/jira/browse/ARROW-196) - [C++] Add conda dev recipe for libarrow and libarrow\_parquet
* [ARROW-197](https://issues.apache.org/jira/browse/ARROW-197) - [Python] Add conda dev recipe for pyarrow
* [ARROW-199](https://issues.apache.org/jira/browse/ARROW-199) - [C++] Refine third party dependency
* [ARROW-201](https://issues.apache.org/jira/browse/ARROW-201) - C++: Initial ParquetWriter implementation
* [ARROW-203](https://issues.apache.org/jira/browse/ARROW-203) - Python: Basic filename based Parquet read/write
* [ARROW-204](https://issues.apache.org/jira/browse/ARROW-204) - [Python] Automate uploading conda build artifacts for libarrow and pyarrow
* [ARROW-206](https://issues.apache.org/jira/browse/ARROW-206) - [C++] Expose an equality API for arrays that compares a range of slots on two arrays
* [ARROW-207](https://issues.apache.org/jira/browse/ARROW-207) - Extend BufferAllocator interface to allow decorators around BufferAllocator
* [ARROW-212](https://issues.apache.org/jira/browse/ARROW-212) - [C++] Clarify the fact that PrimitiveArray is now abstract class
* [ARROW-213](https://issues.apache.org/jira/browse/ARROW-213) - Exposing static arrow build
* [ARROW-214](https://issues.apache.org/jira/browse/ARROW-214) - C++: Add String support to Parquet I/O
* [ARROW-215](https://issues.apache.org/jira/browse/ARROW-215) - C++: Support other integer types in Parquet I/O
* [ARROW-218](https://issues.apache.org/jira/browse/ARROW-218) - Add option to use GitHub API token via environment variable when merging PRs
* [ARROW-222](https://issues.apache.org/jira/browse/ARROW-222) - [C++] Create prototype file-like interface to HDFS (via libhdfs) and begin defining more general IO interface for Arrow data adapters
* [ARROW-233](https://issues.apache.org/jira/browse/ARROW-233) - [C++] Add visibility defines for limiting shared library symbol visibility
* [ARROW-234](https://issues.apache.org/jira/browse/ARROW-234) - [C++] Build with libhdfs support in arrow\_io in conda builds
* [ARROW-236](https://issues.apache.org/jira/browse/ARROW-236) - [Python] Enable Parquet read/write to work with HDFS file objects
* [ARROW-237](https://issues.apache.org/jira/browse/ARROW-237) - [C++] Create Arrow specializations of Parquet allocator and read interfaces
* [ARROW-238](https://issues.apache.org/jira/browse/ARROW-238) - C++: InternalMemoryPool::Free() should throw an error when there is insufficient allocated memory
* [ARROW-242](https://issues.apache.org/jira/browse/ARROW-242) - C++/Python: Support Timestamp Data Type
* [ARROW-245](https://issues.apache.org/jira/browse/ARROW-245) - [Format] Clarify Arrow's relationship with big endian platforms
* [ARROW-251](https://issues.apache.org/jira/browse/ARROW-251) - [C++] Expose APIs for getting code and message of the status
* [ARROW-252](https://issues.apache.org/jira/browse/ARROW-252) - Add implementation guidelines to the documentation
* [ARROW-253](https://issues.apache.org/jira/browse/ARROW-253) - Int types should only have width of 8\*2^n (8, 16, 32, 64)
* [ARROW-254](https://issues.apache.org/jira/browse/ARROW-254) - Remove Bit type as it is redundant with boolean
* [ARROW-255](https://issues.apache.org/jira/browse/ARROW-255) - Finalize Dictionary representation
* [ARROW-256](https://issues.apache.org/jira/browse/ARROW-256) - Add versioning to the arrow spec.
* [ARROW-257](https://issues.apache.org/jira/browse/ARROW-257) - Add a typeids Vector to Union type
* [ARROW-262](https://issues.apache.org/jira/browse/ARROW-262) - [Format] Add a new format document for metadata and logical types for messaging and IPC / on-wire/file representations
* [ARROW-264](https://issues.apache.org/jira/browse/ARROW-264) - Create an Arrow File format
* [ARROW-267](https://issues.apache.org/jira/browse/ARROW-267) - [C++] C++ implementation of file-like layout for RPC / IPC
* [ARROW-270](https://issues.apache.org/jira/browse/ARROW-270) - [Format] Define more generic Interval logical type
* [ARROW-271](https://issues.apache.org/jira/browse/ARROW-271) - Update Field structure to be more explicit
* [ARROW-272](https://issues.apache.org/jira/browse/ARROW-272) - Arrow release 0.1
* [ARROW-279](https://issues.apache.org/jira/browse/ARROW-279) - rename vector module to arrow-vector for consistency
* [ARROW-280](https://issues.apache.org/jira/browse/ARROW-280) - [C++] Consolidate file and shared memory IO interfaces
* [ARROW-282](https://issues.apache.org/jira/browse/ARROW-282) - Make parquet-cpp an optional dependency of pyarrow
* [ARROW-285](https://issues.apache.org/jira/browse/ARROW-285) - Allow for custom flatc compiler
* [ARROW-286](https://issues.apache.org/jira/browse/ARROW-286) - Build thirdparty dependencies in parallel
* [ARROW-289](https://issues.apache.org/jira/browse/ARROW-289) - Install test-util.h
* [ARROW-290](https://issues.apache.org/jira/browse/ARROW-290) - Specialize alloc() in ArrowBuf
* [ARROW-291](https://issues.apache.org/jira/browse/ARROW-291) - [Python] Update NOTICE file for Python codebase
* [ARROW-292](https://issues.apache.org/jira/browse/ARROW-292) - [Java] Upgrade Netty to 4.041
* [ARROW-293](https://issues.apache.org/jira/browse/ARROW-293) - [C++] Implementations of IO interfaces for operating system files
* [ARROW-296](https://issues.apache.org/jira/browse/ARROW-296) - [C++] Remove arrow\_parquet C++ module and related parts of build system
* [ARROW-298](https://issues.apache.org/jira/browse/ARROW-298) - create release scripts
* [ARROW-299](https://issues.apache.org/jira/browse/ARROW-299) - Use absolute namespace in macros
* [ARROW-301](https://issues.apache.org/jira/browse/ARROW-301) - [Format] Add some form of user field metadata to IPC schemas
* [ARROW-302](https://issues.apache.org/jira/browse/ARROW-302) - [Python] Add support to use the Arrow file format with file-like objects
* [ARROW-305](https://issues.apache.org/jira/browse/ARROW-305) - Add compression and use\_dictionary options to Parquet interface
* [ARROW-306](https://issues.apache.org/jira/browse/ARROW-306) - Add option to pass cmake arguments via environment variable
* [ARROW-315](https://issues.apache.org/jira/browse/ARROW-315) - Finalize timestamp type
* [ARROW-318](https://issues.apache.org/jira/browse/ARROW-318) - [Python] Revise README to reflect current state of project
* [ARROW-319](https://issues.apache.org/jira/browse/ARROW-319) - Add canonical Arrow Schema json representation
* [ARROW-324](https://issues.apache.org/jira/browse/ARROW-324) - Update arrow metadata diagram
* [ARROW-325](https://issues.apache.org/jira/browse/ARROW-325) - make TestArrowFile not dependent on timezone


## Bug Fixes

* [ARROW-5](https://issues.apache.org/jira/browse/ARROW-5) - Error when run maven install
* [ARROW-5](https://issues.apache.org/jira/browse/ARROW-5) - Error when run maven install
* [ARROW-16](https://issues.apache.org/jira/browse/ARROW-16) - Building cpp issues on XCode 7.2.1
* [ARROW-17](https://issues.apache.org/jira/browse/ARROW-17) - Set some vector fields to default access level for Drill compatibility
* [ARROW-18](https://issues.apache.org/jira/browse/ARROW-18) - Fix bug with decimal precision and scale
* [ARROW-36](https://issues.apache.org/jira/browse/ARROW-36) - Remove fixVersions from patch tool (until we have them)
* [ARROW-46](https://issues.apache.org/jira/browse/ARROW-46) - Port DRILL-4410 to Arrow
* [ARROW-51](https://issues.apache.org/jira/browse/ARROW-51) - Move ValueVector test from Drill project
* [ARROW-55](https://issues.apache.org/jira/browse/ARROW-55) - Python: fix legacy Python (2.7) tests and add to Travis CI
* [ARROW-62](https://issues.apache.org/jira/browse/ARROW-62) - Format: Are the nulls bits 0 or 1 for null values?
* [ARROW-63](https://issues.apache.org/jira/browse/ARROW-63) - C++: ctest fails if Python 3 is the active Python interpreter
* [ARROW-65](https://issues.apache.org/jira/browse/ARROW-65) - Python: FindPythonLibsNew does not work in a virtualenv
* [ARROW-69](https://issues.apache.org/jira/browse/ARROW-69) - Change permissions for assignable users
* [ARROW-72](https://issues.apache.org/jira/browse/ARROW-72) - FindParquet searches for non-existent header
* [ARROW-75](https://issues.apache.org/jira/browse/ARROW-75) - C++: Fix handling of empty strings
* [ARROW-77](https://issues.apache.org/jira/browse/ARROW-77) - C++: conform null bit interpretation to match ARROW-62
* [ARROW-80](https://issues.apache.org/jira/browse/ARROW-80) - Segmentation fault on len(Array) for empty arrays
* [ARROW-83](https://issues.apache.org/jira/browse/ARROW-83) - Add basic test infrastructure for DecimalType
* [ARROW-84](https://issues.apache.org/jira/browse/ARROW-84) - C++: separate test codes
* [ARROW-88](https://issues.apache.org/jira/browse/ARROW-88) - C++: Refactor given PARQUET-572
* [ARROW-93](https://issues.apache.org/jira/browse/ARROW-93) - XCode 7.3 breaks builds
* [ARROW-94](https://issues.apache.org/jira/browse/ARROW-94) - Expand list example to clarify null vs empty list
* [ARROW-103](https://issues.apache.org/jira/browse/ARROW-103) - Missing patterns from .gitignore
* [ARROW-104](https://issues.apache.org/jira/browse/ARROW-104) - Update Layout.md based on discussion on the mailing list
* [ARROW-105](https://issues.apache.org/jira/browse/ARROW-105) - Unit tests fail if assertions are disabled
* [ARROW-113](https://issues.apache.org/jira/browse/ARROW-113) - TestValueVector test fails if cannot allocate 2GB of memory
* [ARROW-185](https://issues.apache.org/jira/browse/ARROW-185) - [C++] Make sure alignment and memory padding conform to spec
* [ARROW-188](https://issues.apache.org/jira/browse/ARROW-188) - Python: Add numpy as install requirement
* [ARROW-193](https://issues.apache.org/jira/browse/ARROW-193) - For the instruction, typos "int his" should be "in this"
* [ARROW-194](https://issues.apache.org/jira/browse/ARROW-194) - C++: Allow read-only memory mapped source
* [ARROW-200](https://issues.apache.org/jira/browse/ARROW-200) - [Python] Convert Values String looks like it has incorrect error handling
* [ARROW-205](https://issues.apache.org/jira/browse/ARROW-205) - builds failing on master branch with apt-get error
* [ARROW-209](https://issues.apache.org/jira/browse/ARROW-209) - [C++] Broken builds: llvm.org apt repos are unavailable
* [ARROW-210](https://issues.apache.org/jira/browse/ARROW-210) - [C++] Tidy up the type system a little bit
* [ARROW-211](https://issues.apache.org/jira/browse/ARROW-211) - Several typos/errors in Layout.md examples
* [ARROW-217](https://issues.apache.org/jira/browse/ARROW-217) - Fix Travis w.r.t conda 4.1.0 changes
* [ARROW-219](https://issues.apache.org/jira/browse/ARROW-219) - [C++] Passed CMAKE\_CXX\_FLAGS are being dropped, fix compiler warnings
* [ARROW-223](https://issues.apache.org/jira/browse/ARROW-223) - Do not link against libpython
* [ARROW-225](https://issues.apache.org/jira/browse/ARROW-225) - [C++/Python] master Travis CI build is broken
* [ARROW-244](https://issues.apache.org/jira/browse/ARROW-244) - [C++] Some global APIs of IPC module should be visible to the outside
* [ARROW-246](https://issues.apache.org/jira/browse/ARROW-246) - [Java] UnionVector doesn't call allocateNew() when creating it's vectorType
* [ARROW-247](https://issues.apache.org/jira/browse/ARROW-247) - [C++] Missing explicit destructor in RowBatchReader causes an incomplete type error
* [ARROW-250](https://issues.apache.org/jira/browse/ARROW-250) - Fix for ARROW-246 may cause memory leaks
* [ARROW-259](https://issues.apache.org/jira/browse/ARROW-259) - Use flatbuffer fields in java implementation
* [ARROW-260](https://issues.apache.org/jira/browse/ARROW-260) - TestValueVector.testFixedVectorReallocation and testVariableVectorReallocation are flaky
* [ARROW-265](https://issues.apache.org/jira/browse/ARROW-265) - Negative decimal values have wrong padding
* [ARROW-265](https://issues.apache.org/jira/browse/ARROW-265) - Negative decimal values have wrong padding
* [ARROW-266](https://issues.apache.org/jira/browse/ARROW-266) - [C++] Fix the broken build
* [ARROW-274](https://issues.apache.org/jira/browse/ARROW-274) - Make the MapVector nullable
* [ARROW-277](https://issues.apache.org/jira/browse/ARROW-277) - Flatbuf serialization fails for Timestamp type
* [ARROW-278](https://issues.apache.org/jira/browse/ARROW-278) - [Format] Struct type name consistency in implementations and metadata
* [ARROW-283](https://issues.apache.org/jira/browse/ARROW-283) - [C++] Update arrow\_parquet to account for API changes in PARQUET-573
* [ARROW-284](https://issues.apache.org/jira/browse/ARROW-284) - [C++] Triage builds by disabling Arrow-Parquet module
* [ARROW-287](https://issues.apache.org/jira/browse/ARROW-287) - [java] Make nullable vectors use a BitVecor instead of UInt1Vector for bits
* [ARROW-297](https://issues.apache.org/jira/browse/ARROW-297) - Fix Arrow pom for release
* [ARROW-304](https://issues.apache.org/jira/browse/ARROW-304) - NullableMapReaderImpl.isSet() always returns true
* [ARROW-308](https://issues.apache.org/jira/browse/ARROW-308) - UnionListWriter.setPosition() should not call startList()
* [ARROW-309](https://issues.apache.org/jira/browse/ARROW-309) - Types.getMinorTypeForArrowType() does not work for Union type
* [ARROW-313](https://issues.apache.org/jira/browse/ARROW-313) - XCode 8.0 breaks builds
* [ARROW-314](https://issues.apache.org/jira/browse/ARROW-314) - JSONScalar is unnecessary and unused.
* [ARROW-320](https://issues.apache.org/jira/browse/ARROW-320) - ComplexCopier.copy(FieldReader, FieldWriter) should not start a list if reader is not set
* [ARROW-321](https://issues.apache.org/jira/browse/ARROW-321) - Fix Arrow licences
* [ARROW-855](https://issues.apache.org/jira/browse/ARROW-855) - Arrow Memory Leak


