Function TupleMatchesHashFilter

src/backend/executor/nodeResult.c:176–207

* Returns true if tuple matches hash filter. */

 * Returns true if tuple matches hash filter.
 */
static bool
TupleMatchesHashFilter(ResultState *node, TupleTableSlot *resultSlot)
{
	Result	   *resultNode = (Result *)node->ps.plan;
	bool		res = true;

	Assert(resultNode);
	Assert(!TupIsNull(resultSlot));

	if (node->hashFilter)
	{
		int			i;

		cdbhashinit(node->hashFilter);
		for (i = 0; i < resultNode->numHashFilterCols; i++)
		{
			int			attnum = resultNode->hashFilterColIdx[i];
			Datum		hAttr;
			bool		isnull;

			hAttr = slot_getattr(resultSlot, attnum, &isnull);

			cdbhash(node->hashFilter, i + 1, hAttr, isnull);
		}

		int targetSeg = cdbhashreduce(node->hashFilter);

		res = (targetSeg == GpIdentity.segindex);
	}

	return res;
}

/* ----------------------------------------------------------------
 *		ExecResultMarkPos