SET enable_analyzer = 1; DROP TABLE IF EXISTS t1; DROP TABLE IF EXISTS t2; DROP TABLE IF EXISTS t3; CREATE TABLE t1 (a UInt64, b UInt64) ENGINE = Memory; INSERT INTO t1 VALUES (1, 2), (3, 4), (5, 6); CREATE TABLE t2 (a UInt64, b UInt64) ENGINE = Memory; INSERT INTO t2 VALUES (3, 4), (5, 6), (7, 8); CREATE TABLE t3 (a UInt64, b UInt64) ENGINE = Memory; INSERT INTO t3 VALUES (5, 6), (7, 8), (9, 10); SET cross_to_inner_join_rewrite = 1; SELECT * FROM t1, t2, (SELECT a as x from t3 where a + 1 = b ) as t3 WHERE t1.a = if(t2.b > 0, t2.a, 0) AND t2.a = t3.x AND 1 ; SELECT * FROM t1, t2, (SELECT a as x from t3 where a + 1 = b ) as t3 WHERE t1.a = if(t2.b > 0, t2.a, 0) ORDER BY t1.a, t2.a, t3.x ; -- { echoOn } EXPLAIN QUERY TREE SELECT * FROM t1, t2, (SELECT a as x from t3 where a + 1 = b ) as t3 WHERE t1.a = if(t2.b > 0, t2.a, 0) AND t2.a = t3.x AND 1; EXPLAIN QUERY TREE SELECT * FROM t1, t2, (SELECT a as x from t3 where a + 1 = b ) as t3 WHERE t1.a = if(t2.b > 0, t2.a, 0) AND t2.a = t3.x AND 1 SETTINGS cross_to_inner_join_rewrite = 0; EXPLAIN QUERY TREE SELECT * FROM t1, t2, (SELECT a as x from t3 where a + 1 = b ) as t3 WHERE t1.a = if(t2.b > 0, t2.a, 0); -- { echoOff } SELECT * FROM t1, t2, (SELECT a as x from t3 where a + 1 = b ) as t3 WHERE t1.a = if(t2.b > 0, t2.a, 0) SETTINGS cross_to_inner_join_rewrite = 2; -- { serverError INCORRECT_QUERY } DROP TABLE IF EXISTS t1; DROP TABLE IF EXISTS t2; DROP TABLE IF EXISTS t3;