Function add_join_rel

src/backend/optimizer/util/relnode.c:730–749

* add_join_rel * Add given join relation to the list of join relations in the given * PlannerInfo. Also add it to the auxiliary hashtable if there is one. */

 *		PlannerInfo. Also add it to the auxiliary hashtable if there is one.
 */
static void
add_join_rel(PlannerInfo *root, RelOptInfo *joinrel)
{
	/* GEQO requires us to append the new joinrel to the end of the list! */
	root->join_rel_list = lappend(root->join_rel_list, joinrel);

	/* store it into the auxiliary hashtable if there is one. */
	if (root->join_rel_hash)
	{
		JoinHashEntry *hentry;
		bool		found;

		hentry = (JoinHashEntry *) hash_search(root->join_rel_hash,
											   &(joinrel->relids),
											   HASH_ENTER,
											   &found);
		Assert(!found);
		hentry->join_rel = joinrel;
	}
}

/*
 * add_grouped_rel_agg_info