EXPLAIN (COSTS false) SELECT * FROM pg_catalog.pg_class t1, pg_catalog.pg_class t2, pg_catalog.pg_class t3, pg_catalog.pg_class t4 WHERE t1.oid = t2.oid AND t1.oid = t3.oid AND t1.oid = t4.oid;
-- No. L-1-6-6
--- refer fdw.sql
+-- refer ut-fdw.sql
-- No. L-1-6-7
EXPLAIN (COSTS false) SELECT * FROM s1.f1() t1, s1.f1() t2, s1.f1() t3, s1.f1() t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
EXPLAIN (COSTS false) SELECT * FROM s1.f1() t1, s1.f1() t2, s1.f1() t3, s1.f1() t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
-- No. L-1-6-8
-EXPLAIN (COSTS false) SELECT * FROM (VALUES(1,1,1,'1')) AS t1 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2')) AS t2 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2'), (3,3,3,'3')) AS t3 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2'), (3,3,3,'3'), (4,4,4,'4')) AS t4 (c1, c2, c3, c4) WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
+EXPLAIN (COSTS false) SELECT * FROM (VALUES(1,1,1,'1')) AS t1 (c1, c2, c3, c4), s1.t2, s1.t3, s1.t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
/*+Leading(t4 t3 t2 t1)*/
-EXPLAIN (COSTS false) SELECT * FROM (VALUES(1,1,1,'1')) AS t1 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2')) AS t2 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2'), (3,3,3,'3')) AS t3 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2'), (3,3,3,'3'), (4,4,4,'4')) AS t4 (c1, c2, c3, c4) WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
+EXPLAIN (COSTS false) SELECT * FROM (VALUES(1,1,1,'1')) AS t1 (c1, c2, c3, c4), s1.t2, s1.t3, s1.t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
-- No. L-1-6-9
EXPLAIN (COSTS false) WITH c1(c1) AS (SELECT st1.c1 FROM s1.t1 st1, s1.t1 st2, s1.t1 st3, s1.t1 st4 WHERE st1.c1 = st2.c1 AND st1.c1 = st3.c1 AND st1.c1 = st4.c1) SELECT * FROM c1 ct1, c1 ct2, c1 ct3, c1 ct4 WHERE ct1.c1 = ct2.c1 AND ct1.c1 = ct3.c1 AND ct1.c1 = ct4.c1;