Function ContainsValue

src/backend/optimizer/util/predtest_valueset.c:240–249

* basic operation on PossibleValueSet: determine if a value is contained in the set field of PossibleValueSet */

 * basic operation on PossibleValueSet:  determine if a value is contained in the set field of PossibleValueSet
 */
static bool
ContainsValue(PossibleValueSet *pvs, Const *value)
{
	bool		found = false;

	Assert(!pvs->isAnyValuePossible);
	if (pvs->set != NULL)
		hash_search(pvs->set, &value, HASH_FIND, &found);
	return found;
}

/**
 * in-place union operation