Function PlanStateOperatorMemKB

src/backend/executor/execUtils.c:2223–2242

* This method is used to determine how much memory a specific operator * is supposed to use (in KB). */

 * is supposed to use (in KB).
 */
uint64 PlanStateOperatorMemKB(const PlanState *ps)
{
	Assert(ps);
	Assert(ps->plan);
	uint64 result = 0;
	if (ps->plan->operatorMemKB == 0)
	{
		/**
		 * There are some statements that do not go through the resource queue and these
		 * plans dont get decorated with the operatorMemKB. Someday, we should fix resource queues.
		 */
		result = work_mem;
	}
	else
	{
		result = ps->plan->operatorMemKB;
	}

	return result;
}

/**
 * Methods to find motionstate object within a planstate tree given a motion id (which is the same as slice index)