Function ExecInitNullTupleSlot

src/backend/executor/execTuples.c:1863–1870

---------------- * ExecInitNullTupleSlot * * Build a slot containing an all-nulls tuple of the given type. * This is used as a substitute for an input tuple when performing an * outer join. * ---------------- */

 * ----------------
 */
TupleTableSlot *
ExecInitNullTupleSlot(EState *estate, TupleDesc tupType,
					  const TupleTableSlotOps *tts_ops)
{
	TupleTableSlot *slot = ExecInitExtraTupleSlot(estate, tupType, tts_ops);

	return ExecStoreAllNullTuple(slot);
}

/* ---------------------------------------------------------------
 *      Routines for setting/accessing attributes in a slot.