EXPLAIN (COSTS false) SELECT * FROM (SELECT * FROM s1.t1 WHERE t1.c1 = 1) AS s1 WHERE s1.c1 = 1;
----
----- No. S-2-1 complexity query block
+---- No. S-2-1 some complexity query blocks
----
-- No. S-2-1-1
;
----
----- No. S-2-3 RULE definition table
+---- No. S-2-3 RULE or VIEW
----
-- No. S-2-3-1