Function ExecInitResultRelation

src/backend/executor/execUtils.c:891–915

* ExecInitResultRelation * Open relation given by the passed-in RT index and fill its * ResultRelInfo node * * Here, we also save the ResultRelInfo in estate->es_result_relations array * such that it can be accessed later using the RT index. */

 * such that it can be accessed later using the RT index.
 */
void
ExecInitResultRelation(EState *estate, ResultRelInfo *resultRelInfo,
					   Index rti)
{
	Relation	resultRelationDesc;

	resultRelationDesc = ExecGetRangeTableRelation(estate, rti);
	InitResultRelInfo(resultRelInfo,
					  resultRelationDesc,
					  rti,
					  NULL,
					  estate->es_instrument);

	if (estate->es_result_relations == NULL)
		estate->es_result_relations = (ResultRelInfo **)
			palloc0(estate->es_range_table_size * sizeof(ResultRelInfo *));
	estate->es_result_relations[rti - 1] = resultRelInfo;

	/*
	 * Saving in the list allows to avoid needlessly traversing the whole
	 * array when only a few of its entries are possibly non-NULL.
	 */
	estate->es_opened_result_relations =
		lappend(estate->es_opened_result_relations, resultRelInfo);
}

/*
 * UpdateChangedParamSet