Function checkSelfRefInRangeSubSelect

src/backend/parser/parse_cte.c:1220–1237

* Check if a recursive cte is referred to in a RangeSubSelect's SelectStmt. * This is currently not supported and is checked for in the parsing stage */

 * This is currently not supported and is checked for in the parsing stage
 */
static void
checkSelfRefInRangeSubSelect(SelectStmt *stmt, CteState *cstate)
{
	ListCell *lc;
	RecursionContext cxt = cstate->context;

	foreach(lc, stmt->fromClause)
	{
		if (IsA((Node *) lfirst(lc), RangeSubselect))
		{
			cstate->context = RECURSION_SUBLINK;
			RangeSubselect *rs = (RangeSubselect *) lfirst(lc);
			SelectStmt *subquery = (SelectStmt *) rs->subquery;
			checkWellFormedSelectStmt(subquery, cstate);
		}
	}
	cstate->context = cxt;
}

/*
 * GPDB: