PETSc version 3.17.4
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# PetscObjectQuery

Gets a PETSc object associated with a given object.

### Synopsis

    #include "petscsys.h"
    PetscErrorCode  PetscObjectQuery(PetscObject obj,const char name[],PetscObject *ptr)

Not Collective

### Input Parameters

| obj | - the PETSc object Thus must be cast with a (PetscObject), for example, PetscObjectCompose((PetscObject)mat,...);
| name | - name associated with child object
| ptr | - the other PETSc object associated with the PETSc object, this must be cast with (PetscObject*)

The reference count of neither object is increased in this call

### See Also

PetscObjectCompose(), PetscObjectComposeFunction(), PetscObjectQueryFunction()

### Level

advanced

### Location

src/sys/objects/inherit.c

### Examples

src/ksp/ksp/tutorials/ex73.c.html
src/snes/tutorials/ex48.c.html
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