Function cdbpullup_truncatePathKeysForTargetList

src/backend/cdb/cdbpullup.c:343–360

* cdbpullup_truncatePathKeysForTargetList * * Truncate a list of pathkeys to only those that can be evaluated * using the given target list. */

 * using the given target list.
 */
List *
cdbpullup_truncatePathKeysForTargetList(List *pathkeys, List *targetlist)
{
	List	   *new_pathkeys = NIL;
	ListCell   *lc;

	foreach(lc, pathkeys)
	{
		PathKey	   *pk = (PathKey *) lfirst(lc);

		if (!cdbpullup_findEclassInTargetList(pk->pk_eclass, targetlist, InvalidOid, NULL))
			break;

		new_pathkeys = lappend(new_pathkeys, pk);
	}

	return new_pathkeys;
}

/*
 * cdbpullup_make_var