Function find_grouped_rel

src/backend/optimizer/util/relnode.c:909–923

* find_grouped_rel * Returns grouped relation entry corresponding to 'relids' (a set of RT * indexes), or NULL if none exists. */

 *	  indexes), or NULL if none exists.
 */
RelOptInfo *
find_grouped_rel(PlannerInfo *root, Relids relids)
{
	RelAggInfo *agg_info;

	if (!root->setup_agg_pushdown)
		return NULL;

	agg_info = find_grouped_rel_agg_info(root, relids);
	if (agg_info == NULL)
		return NULL;

	return get_cheaper_rel(agg_info->rel_grouped,
						   agg_info->rel_grouped_non_plain);
}

/*
 * get_grouped_rel