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# PetscHMapIVQuerySet
Query and set a (key,value) entry in the hash table 
## Synopsis
```
#include <petsc/private/hashmapiv.h>
PetscErrorCode PetscHMapIVQuerySet(PetscHMapIV ht, PetscInt key, PetscScalar val, PetscBool *missing)
```

## Input Parameters

- ***ht  -*** The hash table
- ***key -*** The key
- ***val -*** The value



## Output Parameter

- ***missing -*** Boolean indicating whether the key was missing





## See Also
 `PetscHMapIVQueryDel()`, `PetscHMapIVSet()`, `PetscHMapIVSetWithMode()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/include/petsc/private/generated_khash.h.html#PetscHMapIVQuerySet">include/petsc/private/generated_khash.h</A>


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