Function reorderqueue_pop

src/backend/executor/nodeIndexscan.c:495–515

* Helper function to pop the next tuple from the reorder queue. */

 * Helper function to pop the next tuple from the reorder queue.
 */
static HeapTuple
reorderqueue_pop(IndexScanState *node)
{
	HeapTuple	result;
	ReorderTuple *topmost;
	int			i;

	topmost = (ReorderTuple *) pairingheap_remove_first(node->iss_ReorderQueue);

	result = topmost->htup;
	for (i = 0; i < node->iss_NumOrderByKeys; i++)
	{
		if (!node->iss_OrderByTypByVals[i] && !topmost->orderbynulls[i])
			pfree(DatumGetPointer(topmost->orderbyvals[i]));
	}
	pfree(topmost->orderbyvals);
	pfree(topmost->orderbynulls);
	pfree(topmost);

	return result;
}


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