Function hashagg_reset_spill_state

src/backend/executor/nodeAgg.c:3458–3491

* Free resources related to a spilled HashAgg. */

 * Free resources related to a spilled HashAgg.
 */
static void
hashagg_reset_spill_state(AggState *aggstate)
{
	/* free spills from initial pass */
	if (aggstate->hash_spills != NULL)
	{
		int			setno;

		for (setno = 0; setno < aggstate->num_hashes; setno++)
		{
			HashAggSpill *spill = &aggstate->hash_spills[setno];

			pfree(spill->ntuples);
			pfree(spill->partitions);
		}
		pfree(aggstate->hash_spills);
		aggstate->hash_spills = NULL;
	}

	/* free batches */
	list_free_deep(aggstate->hash_batches);
	aggstate->hash_batches = NIL;

	/* close tape set */
	if (aggstate->hash_tapeinfo != NULL)
	{
		HashTapeInfo *tapeinfo = aggstate->hash_tapeinfo;

		LogicalTapeSetClose(tapeinfo->tapeset);
		pfree(tapeinfo->freetapes);
		pfree(tapeinfo);
		aggstate->hash_tapeinfo = NULL;
	}
}


/* -----------------