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SET debug= '+d,test_bka_unique'; set optimizer_switch='batched_key_access=on,mrr_cost_based=off'; set optimizer_switch='semijoin=on,firstmatch=on'; set @old_opt_switch=@@optimizer_switch; set optimizer_switch='subquery_materialization_cost_based=off'; drop table if exists t0, t1, t2, t10, t11, t12; create table t1 (a int not null, b int, primary key (a)); create table t2 (a int not null, primary key (a)); create table t3 (a int not null, b int, primary key (a)); insert into t1 values (1,10), (2,20), (3,30), (4,40); insert into t2 values (2), (3), (4), (5); insert into t3 values (10,3), (20,4), (30,5); select * from t2 where t2.a in (select a from t1); a 2 3 4 explain extended select * from t2 where t2.a in (select a from t1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index 1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`) select * from t2 where t2.a in (select a from t1 where t1.b <> 30); a 2 4 explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index 1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30)) select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); a 2 3 explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index 1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 Using index Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t3`.`a` = `test`.`t1`.`b`)) drop table t1, t2, t3; create table t1 (a int, b int, index a (a,b)); create table t2 (a int, index a (a)); create table t3 (a int, b int, index a (a)); insert into t1 values (1,10), (2,20), (3,30), (4,40); create table t0(a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); insert into t1 select rand()*100000+200,rand()*100000 from t0 A, t0 B, t0 C, t0 D; insert into t2 values (2), (3), (4), (5); insert into t3 values (10,3), (20,4), (30,5); select * from t2 where t2.a in (select a from t1); a 2 3 4 explain extended select * from t2 where t2.a in (select a from t1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index a a 5 NULL 4 100.00 Using where; Using index 1 SIMPLE t1 ref a a 5 test.t2.a 101 100.00 Using index; FirstMatch(t2) Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where (`test`.`t1`.`a` = `test`.`t2`.`a`) select * from t2 where t2.a in (select a from t1 where t1.b <> 30); a 2 4 explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index a a 5 NULL 4 100.00 Using where; Using index 1 SIMPLE t1 ref a a 5 test.t2.a 101 100.00 Using where; Using index; FirstMatch(t2) Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30)) select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); a 2 3 explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index a a 5 NULL 4 100.00 Using where; Using index 1 SIMPLE t3 index a a 5 NULL 3 100.00 Using where; Using index 1 SIMPLE t1 ref a a 10 test.t2.a,test.t3.a 116 100.00 Using index; FirstMatch(t2) Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1` join `test`.`t3`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` = `test`.`t3`.`a`)) insert into t1 values (3,31); select * from t2 where t2.a in (select a from t1 where t1.b <> 30); a 2 3 4 select * from t2 where t2.a in (select a from t1 where t1.b <> 30 and t1.b <> 31); a 2 4 explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index a a 5 NULL 4 100.00 Using where; Using index 1 SIMPLE t1 ref a a 5 test.t2.a 101 100.00 Using where; Using index; FirstMatch(t2) Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30)) drop table t0, t1, t2, t3; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t1(a int, b int); insert into t1 values (0,0),(1,1),(2,2); create table t2 as select * from t1; create table t11(a int, b int); create table t10 (pk int, a int, primary key(pk)); insert into t10 select a,a from t0; create table t12 like t10; insert into t12 select * from t10; Flattened because of dependency, t10=func(t1) explain select * from t1 where a in (select pk from t10); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where 1 SIMPLE t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index select * from t1 where a in (select pk from t10); a b 0 0 1 1 2 2 A confluent case of dependency explain select * from t1 where a in (select a from t10 where pk=12); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables select * from t1 where a in (select a from t10 where pk=12); a b explain select * from t1 where a in (select a from t10 where pk=9); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t10 const PRIMARY PRIMARY 4 const 1 NULL 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where select * from t1 where a in (select a from t10 where pk=9); a b An empty table inside explain select * from t1 where a in (select a from t11); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t11 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; End temporary; Using join buffer (Block Nested Loop) select * from t1 where a in (select a from t11); a b explain select * from t1 where a in (select pk from t10) and b in (select pk from t10); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where 1 SIMPLE t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index 1 SIMPLE t10 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using index select * from t1 where a in (select pk from t10) and b in (select pk from t10); a b 0 0 1 1 2 2 flattening a nested subquery explain select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12)); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where 1 SIMPLE t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where 1 SIMPLE t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 Using index select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12)); a b 0 0 1 1 2 2 flattening subquery w/ several tables explain extended select * from t1 where a in (select t10.pk from t10, t12 where t12.pk=t10.a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using where 1 SIMPLE t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 100.00 Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t12` join `test`.`t1` where ((`test`.`t10`.`pk` = `test`.`t1`.`a`) and (`test`.`t12`.`pk` = `test`.`t10`.`a`)) subqueries within outer joins go into ON expr. explAin extended select * from t1 left join (t2 A, t2 B) on ( A.A= t1.A And B.A in (select pk from t10)); id select_type tABle type possiBle_keys key key_len ref rows filtered ExtrA 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 NULL 1 SIMPLE A ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE B ALL NULL NULL NULL NULL 3 100.00 NULL 1 SIMPLE t10 eq_ref PRIMARY PRIMARY 4 test.B.A 1 100.00 Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`A`.`A` AS `A`,`test`.`A`.`B` AS `B`,`test`.`B`.`A` AS `A`,`test`.`B`.`B` AS `B` from `test`.`t1` left join (`test`.`t10` join `test`.`t2` `A` join `test`.`t2` `B`) on(((`test`.`A`.`A` = `test`.`t1`.`A`) And 1 And (`test`.`B`.`A` = `test`.`t10`.`pk`))) where 1 t2 should be wrapped into OJ-nest, so we have "t1 LJ (t2 J t10)" explAin extended select * from t1 left join t2 on (t2.A= t1.A And t2.A in (select pk from t10)); id select_type tABle type possiBle_keys key key_len ref rows filtered ExtrA 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t10 eq_ref PRIMARY PRIMARY 4 test.t2.A 1 100.00 Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`t2`.`A` AS `A`,`test`.`t2`.`B` AS `B` from `test`.`t1` left join (`test`.`t10` join `test`.`t2`) on(((`test`.`t2`.`A` = `test`.`t1`.`A`) And 1 And (`test`.`t2`.`A` = `test`.`t10`.`pk`))) where 1 we shouldn't flatten if we're going to get a join of > MAX_TABLES. explain select * from t1 s00, t1 s01, t1 s02, t1 s03, t1 s04,t1 s05,t1 s06,t1 s07,t1 s08,t1 s09, t1 s10, t1 s11, t1 s12, t1 s13, t1 s14,t1 s15,t1 s16,t1 s17,t1 s18,t1 s19, t1 s20, t1 s21, t1 s22, t1 s23, t1 s24,t1 s25,t1 s26,t1 s27,t1 s28,t1 s29, t1 s30, t1 s31, t1 s32, t1 s33, t1 s34,t1 s35,t1 s36,t1 s37,t1 s38,t1 s39, t1 s40, t1 s41, t1 s42, t1 s43, t1 s44,t1 s45,t1 s46,t1 s47,t1 s48,t1 s49 where s00.a in ( select m00.a from t1 m00, t1 m01, t1 m02, t1 m03, t1 m04,t1 m05,t1 m06,t1 m07,t1 m08,t1 m09, t1 m10, t1 m11, t1 m12, t1 m13, t1 m14,t1 m15,t1 m16,t1 m17,t1 m18,t1 m19 ); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY s00 ALL NULL NULL NULL NULL 3 Using where 1 PRIMARY s01 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s02 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s03 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s04 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s05 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s06 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s07 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s08 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s09 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s10 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s11 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s12 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s13 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s14 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s15 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s16 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s17 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s18 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s19 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s20 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s21 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s22 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s23 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s24 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s25 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s26 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s27 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s28 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s29 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s30 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s31 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s32 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s33 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s34 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s35 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s36 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s37 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s38 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s39 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s40 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s41 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s42 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s43 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s44 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s45 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s46 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s47 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s48 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 PRIMARY s49 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m00 ALL NULL NULL NULL NULL 3 Using where 2 DEPENDENT SUBQUERY m01 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m02 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m03 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m04 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m05 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m06 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m07 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m08 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m09 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m10 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m11 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m12 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m13 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m14 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m15 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m16 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m17 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m18 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY m19 ALL NULL NULL NULL NULL 3 Using join buffer (Block Nested Loop) select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10)) where t1.a < 5; a b a b 0 0 0 0 1 1 1 1 2 2 2 2 prepare s1 from ' select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10)) where t1.a < 5'; execute s1; a b a b 0 0 0 0 1 1 1 1 2 2 2 2 execute s1; a b a b 0 0 0 0 1 1 1 1 2 2 2 2 insert into t1 select (A.a + 10 * B.a),1 from t0 A, t0 B; explain extended select * from t1 where a in (select pk from t10 where pk<3); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t10 range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index 1 SIMPLE t1 ALL NULL NULL NULL NULL 103 100.00 Using where; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t10`.`pk`) and (`test`.`t10`.`pk` < 3)) drop table t0, t1, t2; drop table t10, t11, t12; # # Check that subqueries with outer joins or straight_join work for # different permutations of const and non-const tables. (Ref. Bug#46692) # CREATE TABLE t1 (i INTEGER); CREATE TABLE t2 (i INTEGER); CREATE TABLE t3 (i INTEGER); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 0 0 0 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (2); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 0 0 1 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (1); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 0 0 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (0); DELETE FROM t3; INSERT INTO t2 VALUES (2); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 0 1 0 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (2); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 0 1 1 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (1); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 0 1 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (0); DELETE FROM t3; INSERT INTO t2 VALUES (1); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 0 2 0 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (2); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 0 2 1 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (1); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 0 2 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (0); DELETE FROM t3; INSERT INTO t2 VALUES (0); DELETE FROM t2; INSERT INTO t1 VALUES (2); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 1 0 0 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (2); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 1 0 1 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (1); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 1 0 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (0); DELETE FROM t3; INSERT INTO t2 VALUES (2); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 1 1 0 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (2); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 1 1 1 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i 2 EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (1); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 1 1 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i 2 EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (0); DELETE FROM t3; INSERT INTO t2 VALUES (1); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 1 2 0 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (2); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 1 2 1 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i 2 EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (1); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 1 2 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i 2 EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (0); DELETE FROM t3; INSERT INTO t2 VALUES (0); DELETE FROM t2; INSERT INTO t1 VALUES (1); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 2 0 0 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (2); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 2 0 1 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (1); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 2 0 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i 2 1 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (0); DELETE FROM t3; INSERT INTO t2 VALUES (2); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 2 1 0 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (2); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 2 1 1 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i 2 EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (1); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 2 1 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i 2 1 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i 2 1 EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (0); DELETE FROM t3; INSERT INTO t2 VALUES (1); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 2 2 0 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i EXECUTE stmt; i DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (2); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 2 2 1 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i 2 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 EXECUTE stmt; i 2 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i 2 EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (1); SELECT (SELECT COUNT(*) from t1) AS c1, (SELECT COUNT(*) from t2) AS c2, (SELECT COUNT(*) from t3) AS c3; c1 c2 c3 2 2 2 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i); i 2 1 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 INNER JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 1 EXECUTE stmt; i 2 1 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i 2 1 PREPARE stmt FROM "SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i)"; EXECUTE stmt; i 2 1 EXECUTE stmt; i 2 1 DEALLOCATE PREPARE stmt; EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i 2 1 EXPLAIN SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i 2 1 EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i WHERE t1.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 RIGHT JOIN t3 ON t2.i=t3.i); i EXPLAIN SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (11) IN (SELECT t3.i FROM t2 STRAIGHT_JOIN t3); i INSERT INTO t3 VALUES (0); DELETE FROM t3; INSERT INTO t2 VALUES (0); DELETE FROM t2; INSERT INTO t1 VALUES (0); DROP TABLE t1, t2, t3; create table x1(k int primary key, d1 int, d2 int); create table x2(k int primary key, d1 int, d2 int); insert into x1 values (10, 10, 10), (20, 20, 20), (21, 20, null), (30, null, 30), (40, 40, 40); insert into x2 values (10, 10, 10), (20, 20, 20), (21, 20, null), (30, null, 30); select * from x1 where (d1, d2) in (select d1, d2 from x2); k d1 d2 10 10 10 20 20 20 select * from x1 where (d1, d2) in (select d1, d2 from x2) is true; k d1 d2 10 10 10 20 20 20 select * from x1 where (d1, d2) in (select d1, d2 from x2) is false; k d1 d2 40 40 40 select * from x1 where (d1, d2) in (select d1, d2 from x2) is unknown; k d1 d2 21 20 NULL 30 NULL 30 select * from x1 where d1 in (select d1 from x2 where x1.d2=x2.d2); k d1 d2 10 10 10 20 20 20 select * from x1 where d1 in (select d1 from x2 where x1.d2=x2.d2) is true; k d1 d2 10 10 10 20 20 20 select * from x1 where d1 in (select d1 from x2 where x1.d2=x2.d2) is false; k d1 d2 21 20 NULL 40 40 40 select * from x1 where d1 in (select d1 from x2 where x1.d2=x2.d2) is unknown; k d1 d2 30 NULL 30 select * from x1 where 1 in (select 1 from x2 where x1.d1=x2.d1 and x1.d2=x2.d2); k d1 d2 10 10 10 20 20 20 select * from x1 where 1 in (select 1 from x2 where x1.d1=x2.d1 and x1.d2=x2.d2) is true; k d1 d2 10 10 10 20 20 20 select * from x1 where 1 in (select 1 from x2 where x1.d1=x2.d1 and x1.d2=x2.d2) is false; k d1 d2 21 20 NULL 30 NULL 30 40 40 40 select * from x1 where 1 in (select 1 from x2 where x1.d1=x2.d1 and x1.d2=x2.d2) is unknown; k d1 d2 select * from x1 where exists (select * from x2 where x1.d1=x2.d1 and x1.d2=x2.d2); k d1 d2 10 10 10 20 20 20 drop table x1; drop table x2; CREATE TABLE t1 ( a int(11) NOT NULL, b int(11) NOT NULL, c datetime default NULL, PRIMARY KEY (a), KEY idx_bc (b,c) ); INSERT INTO t1 VALUES (406989,67,'2006-02-23 17:08:46'), (150078,67,'2005-10-26 11:17:45'), (406993,67,'2006-02-27 11:20:57'), (245655,67,'2005-12-08 15:59:08'), (406994,67,'2006-02-27 11:26:46'), (256,67,NULL), (398341,67,'2006-02-20 04:48:44'), (254,67,NULL),(1120,67,NULL), (406988,67,'2006-02-23 17:07:22'), (255,67,NULL), (398340,67,'2006-02-20 04:38:53'),(406631,67,'2006-02-23 10:49:42'), (245653,67,'2005-12-08 15:59:07'),(406992,67,'2006-02-24 16:47:18'), (245654,67,'2005-12-08 15:59:08'),(406995,67,'2006-02-28 11:55:00'), (127261,67,'2005-10-13 12:17:58'),(406991,67,'2006-02-24 16:42:32'), (245652,67,'2005-12-08 15:58:27'),(398545,67,'2006-02-20 04:53:13'), (154504,67,'2005-10-28 11:53:01'),(9199,67,NULL),(1,67,'2006-02-23 15:01:35'), (223456,67,NULL),(4101,67,NULL),(1133,67,NULL), (406990,67,'2006-02-23 18:01:45'),(148815,67,'2005-10-25 15:34:17'), (148812,67,'2005-10-25 15:30:01'),(245651,67,'2005-12-08 15:58:27'), (154503,67,'2005-10-28 11:52:38'); create table t11 select * from t1 where b = 67 AND (c IS NULL OR c > NOW()) order by 3 asc; create table t12 select * from t1 where b = 67 AND (c IS NULL OR c > NOW()) order by 3 desc; create table t21 select * from t1 where b = 67 AND (c IS NULL OR c > '2005-12-08') order by 3 asc; create table t22 select * from t1 where b = 67 AND (c IS NULL OR c > '2005-12-08') order by 3 desc; update t22 set c = '2005-12-08 15:58:27' where a = 255; explain select t21.* from t21,t22 where t21.a = t22.a and t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t11 ALL NULL NULL NULL NULL 8 Using where; Using temporary; Using filesort; Start temporary 1 SIMPLE t12 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t22 ALL NULL NULL NULL NULL 26 Using where; End temporary; Using join buffer (Block Nested Loop) 1 SIMPLE t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (Block Nested Loop) explain format=json select * from t1 where a in (select a from t11); EXPLAIN { "query_block": { "select_id": 1, "duplicates_removal": { "using_temporary_table": true, "nested_loop": [ { "table": { "table_name": "t11", "access_type": "ALL", "rows": 8, "filtered": 100 } }, { "table": { "table_name": "t1", "access_type": "eq_ref", "possible_keys": [ "PRIMARY" ], "key": "PRIMARY", "used_key_parts": [ "a" ], "key_length": "4", "ref": [ "test.t11.a" ], "rows": 1, "filtered": 100 } } ] } } } Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` semi join (`test`.`t11`) where (`test`.`t1`.`a` = `test`.`t11`.`a`) select t21.* from t21,t22 where t21.a = t22.a and t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a; a b c 256 67 NULL drop table t1, t11, t12, t21, t22; create table t1(a int); insert into t1 values (0),(1); explain select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY X ALL NULL NULL NULL NULL 2 NULL 2 DEPENDENT SUBQUERY Y ALL NULL NULL NULL NULL 2 Using where 2 DEPENDENT SUBQUERY Z ALL NULL NULL NULL NULL 2 Using where; FirstMatch(Y); Using join buffer (Block Nested Loop) select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X; subq NULL 0 drop table t1; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t1 as select * from t0; insert into t1 select a+10 from t0; insert into t0 values(2); explain select * from t1 where 2 in (select a from t0); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 11 Using where; FirstMatch 1 SIMPLE t1 ALL NULL NULL NULL NULL 20 Using join buffer (Block Nested Loop) select * from t1 where 2 in (select a from t0); a 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 explain select * from (select a from t0) x where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11 NULL 1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using where; FirstMatch(<derived2>); Using join buffer (Block Nested Loop) 2 DERIVED t0 ALL NULL NULL NULL NULL 11 NULL explain format=json select * from (select a from t0) x where a in (select a from t1); EXPLAIN { "query_block": { "select_id": 1, "nested_loop": [ { "table": { "table_name": "x", "access_type": "ALL", "rows": 11, "filtered": 100, "materialized_from_subquery": { "using_temporary_table": true, "dependent": false, "cacheable": true, "query_block": { "select_id": 2, "table": { "table_name": "t0", "access_type": "ALL", "rows": 11, "filtered": 100 } } } } }, { "table": { "table_name": "t1", "access_type": "ALL", "rows": 20, "filtered": 100, "first_match": "x", "using_join_buffer": "Block Nested Loop", "attached_condition": "(`test`.`t1`.`a` = `x`.`a`)" } } ] } } Warnings: Note 1003 /* select#1 */ select `x`.`a` AS `a` from (/* select#2 */ select `test`.`t0`.`a` AS `a` from `test`.`t0`) `x` semi join (`test`.`t1`) where (`test`.`t1`.`a` = `x`.`a`) drop table t0, t1; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t1 (kp1 int, kp2 int, c int, filler char(100), key(kp1, kp2)); insert into t1 select A.a+10*(B.a+10*C.a), 0, 0, 'filler' from t0 A, t0 B, t0 C; insert into t1 select * from t1 where kp1 < 20; create table t3 (a int); insert into t3 select A.a + 10*B.a from t0 A, t0 B; explain select * from t3 where a in (select kp1 from t1 where kp1<20); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 100 Using where 1 SIMPLE t1 ref kp1 kp1 5 test.t3.a 1 Using index; FirstMatch(t3) select * from t3 where a in (select kp1 from t1 where kp1<20); a 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 explain select * from t3 where a in (select kp1 from t1 where kp1<20) and a<20; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 100 Using where 1 SIMPLE t1 ref kp1 kp1 5 test.t3.a 1 Using index; FirstMatch(t3) select * from t3 where a in (select kp1 from t1 where kp1<20) and a<20; a 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 create table t4 (pk int primary key); insert into t4 select a from t3; explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20 and t4.pk=t1.c); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 100 Using where 1 SIMPLE t1 ref kp1 kp1 5 test.t3.a 1 Using where 1 SIMPLE t4 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 Using index; FirstMatch(t3) select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20 and t4.pk=t1.c); a 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 drop table t1, t3, t4; create table t1 (a int); insert into t1 values (0),(0),(0),(1),(1),(1),(2),(2),(2),(3),(3),(3); set @save_max_heap_table_size=@@max_heap_table_size; set @@max_heap_table_size= 16384; # Attempt to make one test that overflows the heap table when a # non-duplicate row is inserted and one test that overflows the # heap table when a duplicate record is inserted. Debugging showed # that these situations occurred with max_heap_table_size=16384 # and optimizer_join_cache_level equals 1 and 0, respectively. # Finally execute a test that does not overflow the heap table. explain select count(*) from t0 A, t0 B, t0 C where C.a in (select a from t1 D); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE A ALL NULL NULL NULL NULL 10 NULL 1 SIMPLE B ALL NULL NULL NULL NULL 10 Using join buffer (Block Nested Loop) 1 SIMPLE C ALL NULL NULL NULL NULL 10 Using join buffer (Block Nested Loop) 1 SIMPLE D ALL NULL NULL NULL NULL 12 Using where; FirstMatch(C); Using join buffer (Block Nested Loop) flush status; select count(*) from t0 A, t0 B, t0 C where C.a in (select a from t1 D); count(*) 400 show status like 'Created_tmp_disk_tables'; Variable_name Value Created_tmp_disk_tables 0 set @@max_heap_table_size= @save_max_heap_table_size; flush status; select count(*) from t0 A, t0 B, t0 C where C.a in (select a from t1 D); count(*) 400 show status like 'Created_tmp_disk_tables'; Variable_name Value Created_tmp_disk_tables 0 drop table t0, t1; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t2(a int); insert into t2 values (1),(2); create table t3 ( a int , filler char(100), key(a)); insert into t3 select A.a + 10*B.a, 'filler' from t0 A, t0 B; explain select * from t3 where a in (select a from t2) and (a > 5 or a < 10); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Start temporary 1 SIMPLE t3 ref a a 5 test.t2.a 1 End temporary select * from t3 where a in (select a from t2); a filler 1 filler 2 filler drop table t0, t2, t3; create table t1 (a date); insert into t1 values ('2008-01-01'),('2008-01-01'),('2008-02-01'),('2008-02-01'); create table t2 (a int); insert into t2 values (1),(2); create table t3 (a char(10)); insert into t3 select * from t1; insert into t3 values (1),(2); explain select * from t2 where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t2); Using join buffer (Block Nested Loop) explain select * from t2 where a in (select a from t2); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t2); Using join buffer (Block Nested Loop) explain select * from t2 where a in (select a from t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 6 Using where; FirstMatch(t2); Using join buffer (Block Nested Loop) explain select * from t1 where a in (select a from t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 NULL 1 SIMPLE t3 ALL NULL NULL NULL NULL 6 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) drop table t1, t2, t3; create table t1 (a decimal); insert into t1 values (1),(2); explain select * from t1 where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) drop table t1; create table t1 (a int); insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t2 as select * from t1; create table t3 (a int, b int, filler char(100), key(a)); insert into t3 select A.a + 10*B.a, A.a + 10*B.a, 'filler' from t1 A, t1 B, t1 C; explain select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30) and t1.a =3; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Using where; Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ref a a 5 test.t2.a 10 End temporary explain format=json select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30) and t1.a =3; EXPLAIN { "query_block": { "select_id": 1, "duplicates_removal": { "using_temporary_table": true, "nested_loop": [ { "table": { "table_name": "t1", "access_type": "ALL", "rows": 10, "filtered": 100, "attached_condition": "(`test`.`t1`.`a` = 3)" } }, { "table": { "table_name": "t2", "access_type": "ALL", "rows": 10, "filtered": 100, "using_join_buffer": "Block Nested Loop", "attached_condition": "(((`test`.`t2`.`a` < 10) or (`test`.`t2`.`a` > 30)) and (`test`.`t2`.`a` is not null))" } }, { "table": { "table_name": "t3", "access_type": "ref", "possible_keys": [ "a" ], "key": "a", "used_key_parts": [ "a" ], "key_length": "5", "ref": [ "test.t2.a" ], "rows": 10, "filtered": 100 } } ] } } } Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t3`.`filler` AS `filler` from `test`.`t1` semi join (`test`.`t2`) join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`a` = 3) and ((`test`.`t2`.`a` < 10) or (`test`.`t2`.`a` > 30))) explain select straight_join * from t1 A, t1 B where A.a in (select a from t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY A ALL NULL NULL NULL NULL 10 Using where 1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where 2 DEPENDENT SUBQUERY A ALL NULL NULL NULL NULL 10 Using where 2 DEPENDENT SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (Block Nested Loop) explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where 2 DEPENDENT SUBQUERY A ALL NULL NULL NULL NULL 10 Using where 2 DEPENDENT SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (Block Nested Loop) explain select straight_join * from t2 X, t2 Y where X.a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY X ALL NULL NULL NULL NULL 10 Using where 1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY A ALL NULL NULL NULL NULL 10 Using where 2 DEPENDENT SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (Block Nested Loop) create table t0 (a int, b int); insert into t0 values(1,1); explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t0 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using where; Start temporary 1 SIMPLE t3 ref a a 5 test.t2.a 10 End temporary create table t4 as select a as x, a as y from t1; explain select * from t0, t3 where (t3.a, t3.b) in (select x,y from t4) and (t3.a < 10 or t3.a >30); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t0 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t4 ALL NULL NULL NULL NULL 10 Using where; Start temporary 1 SIMPLE t3 ref a a 5 test.t4.x 10 Using where; End temporary drop table t0,t1,t2,t3,t4; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t1 (a int, b int, filler char(100), key(a,b)); insert into t1 select A.a, B.a, 'filler' from t0 A, t0 B; create table t2 as select * from t1; explain select * from t2 where a in (select b from t1 where a=3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 100 Using where 1 SIMPLE t1 ref a a 10 const,test.t2.a 1 Using index; FirstMatch(t2) explain select * from t2 where (b,a) in (select a,b from t1 where a=3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 100 Using where 1 SIMPLE t1 ref a a 10 const,test.t2.a 1 Using index; FirstMatch(t2) drop table t1,t2; create table t1 (a int, b int); insert into t1 select a,a from t0; create table t2 (a int, b int); insert into t2 select A.a + 10*B.a, A.a + 10*B.a from t0 A, t0 B; explain select * from t1 where (a,b) in (select a,b from t2); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 10 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 100 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) drop table t0, t1, t2; create table t0 (a decimal(4,2)); insert into t0 values (10.24), (22.11); create table t1 as select * from t0; insert into t1 select * from t0; explain select * from t0 where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0); Using join buffer (Block Nested Loop) select * from t0 where a in (select a from t1); a 10.24 22.11 drop table t0, t1; create table t0(a date); insert into t0 values ('2008-01-01'),('2008-02-02'); create table t1 as select * from t0; insert into t1 select * from t0; explain select * from t0 where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0); Using join buffer (Block Nested Loop) select * from t0 where a in (select a from t1); a 2008-01-01 2008-02-02 drop table t0, t1; create table t0(a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t1 as select a as a, a as b, a as c from t0 where a < 3; create table t2 as select a as a, a as b from t0 where a < 3; insert into t2 select * from t2; explain select * from t1 where (a,b,c) in (select X.a, Y.a, Z.a from t2 X, t2 Y, t2 Z where X.b=33); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Start temporary 1 SIMPLE X ALL NULL NULL NULL NULL 6 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE Y ALL NULL NULL NULL NULL 6 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE Z ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (Block Nested Loop) drop table t0,t1,t2; set @save_join_buffer_size = @@join_buffer_size; set join_buffer_size= 8192; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t1 (a int, filler1 binary(200), filler2 binary(200)); insert into t1 select a, 'filler123456', 'filler123456' from t0; insert into t1 select a+10, 'filler123456', 'filler123456' from t0; create table t2 as select * from t1; insert into t1 select a+20, 'filler123456', 'filler123456' from t0; insert into t1 values (2, 'duplicate ok', 'duplicate ok'); insert into t1 values (18, 'duplicate ok', 'duplicate ok'); insert into t2 values (3, 'duplicate ok', 'duplicate ok'); insert into t2 values (19, 'duplicate ok', 'duplicate ok'); explain select a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z from t1 ot where a in (select a from t2 it); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE it ALL NULL NULL NULL NULL 22 Start temporary 1 SIMPLE ot ALL NULL NULL NULL NULL 32 Using where; End temporary; Using join buffer (Block Nested Loop) select a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z from t1 ot where a in (select a from t2 it); a mid(filler1, 1,10) Z 0 filler1234 1 1 filler1234 1 10 filler1234 1 11 filler1234 1 12 filler1234 1 13 filler1234 1 14 filler1234 1 15 filler1234 1 16 filler1234 1 17 filler1234 1 18 duplicate 1 18 filler1234 1 19 filler1234 1 2 duplicate 1 2 filler1234 1 3 filler1234 1 4 filler1234 1 5 filler1234 1 6 filler1234 1 7 filler1234 1 8 filler1234 1 9 filler1234 1 explain select a, mid(filler1, 1,10), length(filler1)=length(filler2) from t2 ot where a in (select a from t1 it); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot ALL NULL NULL NULL NULL 22 NULL 1 SIMPLE it ALL NULL NULL NULL NULL 32 Using where; FirstMatch(ot); Using join buffer (Block Nested Loop) select a, mid(filler1, 1,10), length(filler1)=length(filler2) from t2 ot where a in (select a from t1 it); a mid(filler1, 1,10) length(filler1)=length(filler2) 0 filler1234 1 1 filler1234 1 10 filler1234 1 11 filler1234 1 12 filler1234 1 13 filler1234 1 14 filler1234 1 15 filler1234 1 16 filler1234 1 17 filler1234 1 18 filler1234 1 19 duplicate 1 19 filler1234 1 2 filler1234 1 3 duplicate 1 3 filler1234 1 4 filler1234 1 5 filler1234 1 6 filler1234 1 7 filler1234 1 8 filler1234 1 9 filler1234 1 insert into t1 select a+20, 'filler123456', 'filler123456' from t0; insert into t1 select a+20, 'filler123456', 'filler123456' from t0; explain select a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z from t1 ot where a in (select a from t2 it); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE it ALL NULL NULL NULL NULL 22 Start temporary 1 SIMPLE ot ALL NULL NULL NULL NULL 52 Using where; End temporary; Using join buffer (Block Nested Loop) select a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z from t1 ot where a in (select a from t2 it); a mid(filler1, 1,10) Z 0 filler1234 1 1 filler1234 1 10 filler1234 1 11 filler1234 1 12 filler1234 1 13 filler1234 1 14 filler1234 1 15 filler1234 1 16 filler1234 1 17 filler1234 1 18 duplicate 1 18 filler1234 1 19 filler1234 1 2 duplicate 1 2 filler1234 1 3 filler1234 1 4 filler1234 1 5 filler1234 1 6 filler1234 1 7 filler1234 1 8 filler1234 1 9 filler1234 1 explain select a, mid(filler1, 1,10), length(filler1)=length(filler2) from t2 ot where a in (select a from t1 it); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot ALL NULL NULL NULL NULL 22 NULL 1 SIMPLE it ALL NULL NULL NULL NULL 52 Using where; FirstMatch(ot); Using join buffer (Block Nested Loop) select a, mid(filler1, 1,10), length(filler1)=length(filler2) from t2 ot where a in (select a from t1 it); a mid(filler1, 1,10) length(filler1)=length(filler2) 0 filler1234 1 1 filler1234 1 10 filler1234 1 11 filler1234 1 12 filler1234 1 13 filler1234 1 14 filler1234 1 15 filler1234 1 16 filler1234 1 17 filler1234 1 18 filler1234 1 19 duplicate 1 19 filler1234 1 2 filler1234 1 3 duplicate 1 3 filler1234 1 4 filler1234 1 5 filler1234 1 6 filler1234 1 7 filler1234 1 8 filler1234 1 9 filler1234 1 set @@join_buffer_size = @save_join_buffer_size; drop table t1, t2; create table t1 (a int, b int, key(a)); create table t2 (a int, b int, key(a)); create table t3 (a int, b int, key(a)); insert into t1 select a,a from t0; insert into t2 select a,a from t0; insert into t3 select a,a from t0; t2 and t3 must be use 'ref', not 'ALL': explain select * from t0 where a in (select t2.a+t3.a from t1 left join (t2 join t3) on t2.a=t1.a and t3.a=t1.a); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 10 NULL 1 SIMPLE t1 index a a 5 NULL 10 Using where; Using index 1 SIMPLE t2 ref a a 5 test.t1.a 1 Using index 1 SIMPLE t3 ref a a 5 test.t1.a 1 Using index; FirstMatch(t0) drop table t0, t1,t2,t3; Test that neither MaterializeLookup strategy for semijoin, nor subquery materialization is used when BLOBs are involved (except when arguments of some functions). set @prefix_len = 6; set @blob_len = 16; set @suffix_len = @blob_len - @prefix_len; create table t1_16 (a1 blob(16), a2 blob(16)); create table t2_16 (b1 blob(16), b2 blob(16)); create table t3_16 (c1 blob(16), c2 blob(16)); insert into t1_16 values (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); insert into t1_16 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t1_16 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t2_16 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t2_16 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t2_16 values (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); insert into t3_16 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t3_16 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t3_16 values (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); insert into t3_16 values (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); explain extended select left(a1,7), left(a2,7) from t1_16 where a1 in (select b1 from t2_16 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_16); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` semi join (`test`.`t2_16`) where ((`test`.`t2_16`.`b1` = `test`.`t1_16`.`a1`) and (`test`.`t1_16`.`a1` > '0')) select left(a1,7), left(a2,7) from t1_16 where a1 in (select b1 from t2_16 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_16 where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_16); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` semi join (`test`.`t2_16`) where ((`test`.`t2_16`.`b2` = `test`.`t1_16`.`a2`) and (`test`.`t2_16`.`b1` = `test`.`t1_16`.`a1`) and (`test`.`t1_16`.`a1` > '0')) select left(a1,7), left(a2,7) from t1_16 where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_16 where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_16 ALL NULL NULL NULL NULL 3 100.00 NULL 1 SIMPLE t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_16); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` semi join (`test`.`t2_16`) where ((`test`.`t2_16`.`b1` > '0') and (`test`.`t1_16`.`a1` = substr(`test`.`t2_16`.`b1`,1,16))) select left(a1,7), left(a2,7) from t1_16 where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_16 where a1 in (select group_concat(b1) from t2_16 group by b2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <in_optimizer>(`test`.`t1_16`.`a1`,<exists>(/* select#2 */ select 1 from `test`.`t2_16` group by `test`.`t2_16`.`b2` having (<cache>(`test`.`t1_16`.`a1`) = <ref_null_helper>(group_concat(`test`.`t2_16`.`b1` separator ','))))) select left(a1,7), left(a2,7) from t1_16 where a1 in (select group_concat(b1) from t2_16 group by b2); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x set @@group_concat_max_len = 256; explain extended select left(a1,7), left(a2,7) from t1_16 where a1 in (select group_concat(b1) from t2_16 group by b2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <in_optimizer>(`test`.`t1_16`.`a1`,<exists>(/* select#2 */ select 1 from `test`.`t2_16` group by `test`.`t2_16`.`b2` having (<cache>(`test`.`t1_16`.`a1`) = <ref_null_helper>(group_concat(`test`.`t2_16`.`b1` separator ','))))) select left(a1,7), left(a2,7) from t1_16 where a1 in (select group_concat(b1) from t2_16 group by b2); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x create table t1 (a1 char(8), a2 char(8)); create table t2 (b1 char(8), b2 char(8)); create table t3 (c1 char(8), c2 char(8)); insert into t1 values ('1 - 00', '2 - 00'); insert into t1 values ('1 - 01', '2 - 01'); insert into t1 values ('1 - 02', '2 - 02'); insert into t2 values ('1 - 01', '2 - 01'); insert into t2 values ('1 - 01', '2 - 01'); insert into t2 values ('1 - 02', '2 - 02'); insert into t2 values ('1 - 02', '2 - 02'); insert into t2 values ('1 - 03', '2 - 03'); insert into t3 values ('1 - 01', '2 - 01'); insert into t3 values ('1 - 02', '2 - 02'); insert into t3 values ('1 - 03', '2 - 03'); insert into t3 values ('1 - 04', '2 - 04'); explain extended select * from t1 where concat(a1,'x') IN (select left(a1,8) from t1_16 where (a1, a2) IN (select t2_16.b1, t2_16.b2 from t2_16, t2 where t2.b2 = substring(t2_16.b2,1,6) and t2.b1 IN (select c1 from t3 where c2 > '0'))); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Start temporary 1 SIMPLE t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 5 100.00 Using where; End temporary; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t3` join `test`.`t2_16` join `test`.`t2` join `test`.`t1_16`) where ((`test`.`t2_16`.`b2` = `test`.`t1_16`.`a2`) and (`test`.`t2_16`.`b1` = `test`.`t1_16`.`a1`) and (`test`.`t2`.`b1` = `test`.`t3`.`c1`) and (`test`.`t2`.`b2` = substr(`test`.`t2_16`.`b2`,1,6)) and (`test`.`t3`.`c2` > '0') and (concat(`test`.`t1`.`a1`,'x') = left(`test`.`t1_16`.`a1`,8))) drop table t1_16, t2_16, t3_16, t1, t2, t3; set @blob_len = 512; set @suffix_len = @blob_len - @prefix_len; create table t1_512 (a1 blob(512), a2 blob(512)); create table t2_512 (b1 blob(512), b2 blob(512)); create table t3_512 (c1 blob(512), c2 blob(512)); insert into t1_512 values (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); insert into t1_512 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t1_512 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t2_512 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t2_512 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t2_512 values (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); insert into t3_512 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t3_512 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t3_512 values (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); insert into t3_512 values (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); explain extended select left(a1,7), left(a2,7) from t1_512 where a1 in (select b1 from t2_512 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_512); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` semi join (`test`.`t2_512`) where ((`test`.`t2_512`.`b1` = `test`.`t1_512`.`a1`) and (`test`.`t1_512`.`a1` > '0')) select left(a1,7), left(a2,7) from t1_512 where a1 in (select b1 from t2_512 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_512 where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_512); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` semi join (`test`.`t2_512`) where ((`test`.`t2_512`.`b2` = `test`.`t1_512`.`a2`) and (`test`.`t2_512`.`b1` = `test`.`t1_512`.`a1`) and (`test`.`t1_512`.`a1` > '0')) select left(a1,7), left(a2,7) from t1_512 where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_512 where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_512 ALL NULL NULL NULL NULL 3 100.00 NULL 1 SIMPLE t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_512); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` semi join (`test`.`t2_512`) where ((`test`.`t2_512`.`b1` > '0') and (`test`.`t1_512`.`a1` = substr(`test`.`t2_512`.`b1`,1,512))) select left(a1,7), left(a2,7) from t1_512 where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_512 where a1 in (select group_concat(b1) from t2_512 group by b2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <in_optimizer>(`test`.`t1_512`.`a1`,<exists>(/* select#2 */ select 1 from `test`.`t2_512` group by `test`.`t2_512`.`b2` having (<cache>(`test`.`t1_512`.`a1`) = <ref_null_helper>(group_concat(`test`.`t2_512`.`b1` separator ','))))) select left(a1,7), left(a2,7) from t1_512 where a1 in (select group_concat(b1) from t2_512 group by b2); left(a1,7) left(a2,7) Warnings: Warning 1260 Row 1 was cut by GROUP_CONCAT() Warning 1260 Row 2 was cut by GROUP_CONCAT() Warning 1260 Row 3 was cut by GROUP_CONCAT() Warning 1260 Row 4 was cut by GROUP_CONCAT() Warning 1260 Row 5 was cut by GROUP_CONCAT() Warning 1260 Row 6 was cut by GROUP_CONCAT() Warning 1260 Row 7 was cut by GROUP_CONCAT() Warning 1260 Row 8 was cut by GROUP_CONCAT() Warning 1260 Row 9 was cut by GROUP_CONCAT() set @@group_concat_max_len = 256; explain extended select left(a1,7), left(a2,7) from t1_512 where a1 in (select group_concat(b1) from t2_512 group by b2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <in_optimizer>(`test`.`t1_512`.`a1`,<exists>(/* select#2 */ select 1 from `test`.`t2_512` group by `test`.`t2_512`.`b2` having (<cache>(`test`.`t1_512`.`a1`) = <ref_null_helper>(group_concat(`test`.`t2_512`.`b1` separator ','))))) select left(a1,7), left(a2,7) from t1_512 where a1 in (select group_concat(b1) from t2_512 group by b2); left(a1,7) left(a2,7) Warnings: Warning 1260 Row 1 was cut by GROUP_CONCAT() Warning 1260 Row 2 was cut by GROUP_CONCAT() Warning 1260 Row 3 was cut by GROUP_CONCAT() Warning 1260 Row 4 was cut by GROUP_CONCAT() Warning 1260 Row 5 was cut by GROUP_CONCAT() Warning 1260 Row 6 was cut by GROUP_CONCAT() Warning 1260 Row 7 was cut by GROUP_CONCAT() Warning 1260 Row 8 was cut by GROUP_CONCAT() Warning 1260 Row 9 was cut by GROUP_CONCAT() drop table t1_512, t2_512, t3_512; set @blob_len = 513; set @suffix_len = @blob_len - @prefix_len; create table t1_513 (a1 blob(513), a2 blob(513)); create table t2_513 (b1 blob(513), b2 blob(513)); create table t3_513 (c1 blob(513), c2 blob(513)); insert into t1_513 values (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); insert into t1_513 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t1_513 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t2_513 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t2_513 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t2_513 values (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); insert into t3_513 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t3_513 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t3_513 values (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); insert into t3_513 values (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); explain extended select left(a1,7), left(a2,7) from t1_513 where a1 in (select b1 from t2_513 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_513 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t2_513 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_513); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_513`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_513`.`a2`,7) AS `left(a2,7)` from `test`.`t1_513` semi join (`test`.`t2_513`) where ((`test`.`t2_513`.`b1` = `test`.`t1_513`.`a1`) and (`test`.`t1_513`.`a1` > '0')) select left(a1,7), left(a2,7) from t1_513 where a1 in (select b1 from t2_513 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_513 where (a1,a2) in (select b1, b2 from t2_513 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_513 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t2_513 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_513); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_513`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_513`.`a2`,7) AS `left(a2,7)` from `test`.`t1_513` semi join (`test`.`t2_513`) where ((`test`.`t2_513`.`b2` = `test`.`t1_513`.`a2`) and (`test`.`t2_513`.`b1` = `test`.`t1_513`.`a1`) and (`test`.`t1_513`.`a1` > '0')) select left(a1,7), left(a2,7) from t1_513 where (a1,a2) in (select b1, b2 from t2_513 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_513 where a1 in (select substring(b1,1,513) from t2_513 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_513 ALL NULL NULL NULL NULL 3 100.00 NULL 1 SIMPLE t2_513 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_513); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_513`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_513`.`a2`,7) AS `left(a2,7)` from `test`.`t1_513` semi join (`test`.`t2_513`) where ((`test`.`t2_513`.`b1` > '0') and (`test`.`t1_513`.`a1` = substr(`test`.`t2_513`.`b1`,1,513))) select left(a1,7), left(a2,7) from t1_513 where a1 in (select substring(b1,1,513) from t2_513 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_513 where a1 in (select group_concat(b1) from t2_513 group by b2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_513 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY t2_513 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_513`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_513`.`a2`,7) AS `left(a2,7)` from `test`.`t1_513` where <in_optimizer>(`test`.`t1_513`.`a1`,<exists>(/* select#2 */ select 1 from `test`.`t2_513` group by `test`.`t2_513`.`b2` having (<cache>(`test`.`t1_513`.`a1`) = <ref_null_helper>(group_concat(`test`.`t2_513`.`b1` separator ','))))) select left(a1,7), left(a2,7) from t1_513 where a1 in (select group_concat(b1) from t2_513 group by b2); left(a1,7) left(a2,7) Warnings: Warning 1260 Row 1 was cut by GROUP_CONCAT() Warning 1260 Row 2 was cut by GROUP_CONCAT() Warning 1260 Row 3 was cut by GROUP_CONCAT() Warning 1260 Row 4 was cut by GROUP_CONCAT() Warning 1260 Row 5 was cut by GROUP_CONCAT() Warning 1260 Row 6 was cut by GROUP_CONCAT() Warning 1260 Row 7 was cut by GROUP_CONCAT() Warning 1260 Row 8 was cut by GROUP_CONCAT() Warning 1260 Row 9 was cut by GROUP_CONCAT() drop table t1_513, t2_513, t3_513; set @blob_len = 1024; set @suffix_len = @blob_len - @prefix_len; create table t1_1024 (a1 blob(1024), a2 blob(1024)); create table t2_1024 (b1 blob(1024), b2 blob(1024)); create table t3_1024 (c1 blob(1024), c2 blob(1024)); insert into t1_1024 values (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); insert into t1_1024 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t1_1024 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t2_1024 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t2_1024 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t2_1024 values (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); insert into t3_1024 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t3_1024 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t3_1024 values (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); insert into t3_1024 values (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); explain extended select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_1024); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` semi join (`test`.`t2_1024`) where ((`test`.`t2_1024`.`b1` = `test`.`t1_1024`.`a1`) and (`test`.`t1_1024`.`a1` > '0')) select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_1024); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` semi join (`test`.`t2_1024`) where ((`test`.`t2_1024`.`b2` = `test`.`t1_1024`.`a2`) and (`test`.`t2_1024`.`b1` = `test`.`t1_1024`.`a1`) and (`test`.`t1_1024`.`a1` > '0')) select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_1024 ALL NULL NULL NULL NULL 3 100.00 NULL 1 SIMPLE t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_1024); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` semi join (`test`.`t2_1024`) where ((`test`.`t2_1024`.`b1` > '0') and (`test`.`t1_1024`.`a1` = substr(`test`.`t2_1024`.`b1`,1,1024))) select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_1024 where a1 in (select group_concat(b1) from t2_1024 group by b2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <in_optimizer>(`test`.`t1_1024`.`a1`,<exists>(/* select#2 */ select 1 from `test`.`t2_1024` group by `test`.`t2_1024`.`b2` having (<cache>(`test`.`t1_1024`.`a1`) = <ref_null_helper>(group_concat(`test`.`t2_1024`.`b1` separator ','))))) select left(a1,7), left(a2,7) from t1_1024 where a1 in (select group_concat(b1) from t2_1024 group by b2); left(a1,7) left(a2,7) Warnings: Warning 1260 Row 1 was cut by GROUP_CONCAT() Warning 1260 Row 2 was cut by GROUP_CONCAT() Warning 1260 Row 3 was cut by GROUP_CONCAT() Warning 1260 Row 4 was cut by GROUP_CONCAT() Warning 1260 Row 5 was cut by GROUP_CONCAT() Warning 1260 Row 6 was cut by GROUP_CONCAT() Warning 1260 Row 7 was cut by GROUP_CONCAT() Warning 1260 Row 8 was cut by GROUP_CONCAT() Warning 1260 Row 9 was cut by GROUP_CONCAT() set @@group_concat_max_len = 256; explain extended select left(a1,7), left(a2,7) from t1_1024 where a1 in (select group_concat(b1) from t2_1024 group by b2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <in_optimizer>(`test`.`t1_1024`.`a1`,<exists>(/* select#2 */ select 1 from `test`.`t2_1024` group by `test`.`t2_1024`.`b2` having (<cache>(`test`.`t1_1024`.`a1`) = <ref_null_helper>(group_concat(`test`.`t2_1024`.`b1` separator ','))))) select left(a1,7), left(a2,7) from t1_1024 where a1 in (select group_concat(b1) from t2_1024 group by b2); left(a1,7) left(a2,7) Warnings: Warning 1260 Row 1 was cut by GROUP_CONCAT() Warning 1260 Row 2 was cut by GROUP_CONCAT() Warning 1260 Row 3 was cut by GROUP_CONCAT() Warning 1260 Row 4 was cut by GROUP_CONCAT() Warning 1260 Row 5 was cut by GROUP_CONCAT() Warning 1260 Row 6 was cut by GROUP_CONCAT() Warning 1260 Row 7 was cut by GROUP_CONCAT() Warning 1260 Row 8 was cut by GROUP_CONCAT() Warning 1260 Row 9 was cut by GROUP_CONCAT() drop table t1_1024, t2_1024, t3_1024; set @blob_len = 1025; set @suffix_len = @blob_len - @prefix_len; create table t1_1025 (a1 blob(1025), a2 blob(1025)); create table t2_1025 (b1 blob(1025), b2 blob(1025)); create table t3_1025 (c1 blob(1025), c2 blob(1025)); insert into t1_1025 values (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); insert into t1_1025 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t1_1025 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t2_1025 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t2_1025 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t2_1025 values (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); insert into t3_1025 values (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); insert into t3_1025 values (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); insert into t3_1025 values (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); insert into t3_1025 values (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); explain extended select left(a1,7), left(a2,7) from t1_1025 where a1 in (select b1 from t2_1025 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_1025); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` semi join (`test`.`t2_1025`) where ((`test`.`t2_1025`.`b1` = `test`.`t1_1025`.`a1`) and (`test`.`t1_1025`.`a1` > '0')) select left(a1,7), left(a2,7) from t1_1025 where a1 in (select b1 from t2_1025 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_1025 where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_1025); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` semi join (`test`.`t2_1025`) where ((`test`.`t2_1025`.`b2` = `test`.`t1_1025`.`a2`) and (`test`.`t2_1025`.`b1` = `test`.`t1_1025`.`a1`) and (`test`.`t1_1025`.`a1` > '0')) select left(a1,7), left(a2,7) from t1_1025 where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_1025 where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1_1025 ALL NULL NULL NULL NULL 3 100.00 NULL 1 SIMPLE t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using where; FirstMatch(t1_1025); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` semi join (`test`.`t2_1025`) where ((`test`.`t2_1025`.`b1` > '0') and (`test`.`t1_1025`.`a1` = substr(`test`.`t2_1025`.`b1`,1,1025))) select left(a1,7), left(a2,7) from t1_1025 where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x 1 - 02x 2 - 02x explain extended select left(a1,7), left(a2,7) from t1_1025 where a1 in (select group_concat(b1) from t2_1025 group by b2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <in_optimizer>(`test`.`t1_1025`.`a1`,<exists>(/* select#2 */ select 1 from `test`.`t2_1025` group by `test`.`t2_1025`.`b2` having (<cache>(`test`.`t1_1025`.`a1`) = <ref_null_helper>(group_concat(`test`.`t2_1025`.`b1` separator ','))))) select left(a1,7), left(a2,7) from t1_1025 where a1 in (select group_concat(b1) from t2_1025 group by b2); left(a1,7) left(a2,7) Warnings: Warning 1260 Row 1 was cut by GROUP_CONCAT() Warning 1260 Row 2 was cut by GROUP_CONCAT() Warning 1260 Row 3 was cut by GROUP_CONCAT() Warning 1260 Row 4 was cut by GROUP_CONCAT() Warning 1260 Row 5 was cut by GROUP_CONCAT() Warning 1260 Row 6 was cut by GROUP_CONCAT() Warning 1260 Row 7 was cut by GROUP_CONCAT() Warning 1260 Row 8 was cut by GROUP_CONCAT() Warning 1260 Row 9 was cut by GROUP_CONCAT() set @@group_concat_max_len = 256; explain extended select left(a1,7), left(a2,7) from t1_1025 where a1 in (select group_concat(b1) from t2_1025 group by b2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: Note 1003 /* select#1 */ select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <in_optimizer>(`test`.`t1_1025`.`a1`,<exists>(/* select#2 */ select 1 from `test`.`t2_1025` group by `test`.`t2_1025`.`b2` having (<cache>(`test`.`t1_1025`.`a1`) = <ref_null_helper>(group_concat(`test`.`t2_1025`.`b1` separator ','))))) select left(a1,7), left(a2,7) from t1_1025 where a1 in (select group_concat(b1) from t2_1025 group by b2); left(a1,7) left(a2,7) Warnings: Warning 1260 Row 1 was cut by GROUP_CONCAT() Warning 1260 Row 2 was cut by GROUP_CONCAT() Warning 1260 Row 3 was cut by GROUP_CONCAT() Warning 1260 Row 4 was cut by GROUP_CONCAT() Warning 1260 Row 5 was cut by GROUP_CONCAT() Warning 1260 Row 6 was cut by GROUP_CONCAT() Warning 1260 Row 7 was cut by GROUP_CONCAT() Warning 1260 Row 8 was cut by GROUP_CONCAT() Warning 1260 Row 9 was cut by GROUP_CONCAT() drop table t1_1025, t2_1025, t3_1025; # # WL#5561: Enable semi join transformation with outer join. # CREATE TABLE ot1(a INT); CREATE TABLE ot2(a INT); CREATE TABLE ot3(a INT); CREATE TABLE it1(a INT); CREATE TABLE it2(a INT); CREATE TABLE it3(a INT); INSERT INTO ot1 VALUES(0),(1),(2),(3),(4),(5),(6),(7); INSERT INTO ot2 VALUES(0),(2),(4),(6); INSERT INTO ot3 VALUES(0),(3),(6); INSERT INTO it1 VALUES(0),(1),(2),(3),(4),(5),(6),(7); INSERT INTO it2 VALUES(0),(2),(4),(6); INSERT INTO it3 VALUES(0),(3),(6); # Test cases, Subquery Pattern 1 # Example SQ1.1: explain SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a WHERE ot1.a IN (SELECT a FROM it3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE it3 ALL NULL NULL NULL NULL 3 Start temporary 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 Using where; End temporary; Using join buffer (Block Nested Loop) 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (Block Nested Loop) SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a WHERE ot1.a IN (SELECT a FROM it3); a a 0 0 3 NULL 6 6 # Example SQ1.2: explain SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a WHERE COALESCE(ot2.a,0) IN (SELECT a FROM it3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE it3 ALL NULL NULL NULL NULL 3 Start temporary 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 Using join buffer (Block Nested Loop) 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a WHERE COALESCE(ot2.a,0) IN (SELECT a FROM it3); a a 0 0 1 NULL 3 NULL 5 NULL 6 6 7 NULL # Example SQ1.3: explain SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a WHERE (ot1.a,ot2.a) IN (SELECT a, a FROM it3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE it3 ALL NULL NULL NULL NULL 3 Start temporary 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a WHERE (ot1.a,ot2.a) IN (SELECT a, a FROM it3); a a 0 0 6 6 # More test cases SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a+0 WHERE ot1.a IN (SELECT a FROM it3); a a 0 0 3 NULL 6 6 SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a+0 WHERE ot1.a IN (SELECT a+0 FROM it3); a a 0 0 3 NULL 6 6 SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a+0 WHERE COALESCE(ot2.a,0) IN (SELECT a FROM it3); a a 0 0 1 NULL 3 NULL 5 NULL 6 6 7 NULL SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a WHERE COALESCE(ot2.a,0) IN (SELECT a+0 FROM it3); a a 0 0 1 NULL 3 NULL 5 NULL 6 6 7 NULL SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a+0 WHERE (ot1.a,ot2.a) IN (SELECT a, a FROM it3); a a 0 0 6 6 SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a LEFT JOIN ot3 ON ot1.a=ot3.a WHERE ot1.a IN (SELECT a FROM it3); a a a 0 0 0 3 NULL 3 6 6 6 SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a LEFT JOIN ot3 ON ot1.a=ot3.a WHERE COALESCE(ot2.a,0) IN (SELECT a FROM it3); a a a 0 0 0 1 NULL NULL 3 NULL 3 5 NULL NULL 6 6 6 7 NULL NULL SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a LEFT JOIN ot3 ON ot1.a=ot3.a WHERE COALESCE(ot3.a,0) IN (SELECT a FROM it3); a a a 0 0 0 1 NULL NULL 2 2 NULL 3 NULL 3 4 4 NULL 5 NULL NULL 6 6 6 7 NULL NULL SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a LEFT JOIN ot3 ON ot2.a=ot3.a WHERE ot1.a IN (SELECT a FROM it3); a a a 0 0 0 3 NULL NULL 6 6 6 SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a LEFT JOIN ot3 ON ot2.a=ot3.a WHERE COALESCE(ot2.a,0) IN (SELECT a FROM it3); a a a 0 0 0 1 NULL NULL 3 NULL NULL 5 NULL NULL 6 6 6 7 NULL NULL SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a LEFT JOIN ot3 ON ot2.a=ot3.a WHERE COALESCE(ot3.a,0) IN (SELECT a FROM it3); a a a 0 0 0 1 NULL NULL 2 2 NULL 3 NULL NULL 4 4 NULL 5 NULL NULL 6 6 6 7 NULL NULL # Test cases, Subquery Pattern 2 # Example SQ2.1: explain SELECT * FROM ot1 JOIN ot2 ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE it3 ALL NULL NULL NULL NULL 3 Start temporary 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 Using where; End temporary; Using join buffer (Block Nested Loop) 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (Block Nested Loop) SELECT * FROM ot1 JOIN ot2 ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it3); a a 0 0 6 6 # Example SQ2.2: explain SELECT * FROM ot1 JOIN ot2 ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it2) AND ot2.a IN (SELECT a FROM it3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE it3 ALL NULL NULL NULL NULL 3 Start temporary 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer (Block Nested Loop) 1 SIMPLE it2 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(ot2); Using join buffer (Block Nested Loop) SELECT * FROM ot1 JOIN ot2 ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it2) AND ot2.a IN (SELECT a FROM it3); a a 0 0 6 6 # More test cases SELECT * FROM ot1 JOIN ot2 ON ot1.a=ot2.a+0 AND ot1.a IN (SELECT a FROM it3); a a 0 0 6 6 SELECT * FROM ot1 JOIN ot2 ON ot1.a=ot2.a AND ot1.a IN (SELECT a+0 FROM it3); a a 0 0 6 6 SELECT * FROM ot1 JOIN ot2 ON ot1.a=ot2.a+0 AND ot2.a IN (SELECT a FROM it3); a a 0 0 6 6 SELECT * FROM ot1 JOIN ot2 ON ot1.a=ot2.a AND ot2.a IN (SELECT a+0 FROM it3); a a 0 0 6 6 SELECT * FROM ot1 JOIN ot2 ON ot1.a=ot2.a AND ot1.a IN (SELECT a+0 FROM it2) AND ot2.a IN (SELECT a+0 FROM it3); a a 0 0 6 6 SELECT * FROM ot1 JOIN ot2 ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it3) JOIN ot3 ON ot2.a=ot3.a AND ot3.a IN (SELECT a FROM it3); a a a 0 0 0 6 6 6 # Test cases, Subquery Pattern 3 # Example SQ3.1: explain SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 NULL 1 SIMPLE it3 ALL NULL NULL NULL NULL 3 Using where; FirstMatch(ot1) 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 Using where SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it3); a a 0 0 1 NULL 2 NULL 3 NULL 4 NULL 5 NULL 6 6 7 NULL # Example SQ3.2: explain SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a AND ot2.a IN (SELECT a FROM it2); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 NULL 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 Using where 1 SIMPLE it2 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(ot2) SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a AND ot2.a IN (SELECT a FROM it2); a a 0 0 1 NULL 2 2 3 NULL 4 4 5 NULL 6 6 7 NULL # Example SQ3.3 explain SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1) AND ot2.a IN (SELECT a FROM it2); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 NULL 1 SIMPLE it1 ALL NULL NULL NULL NULL 8 Using where; FirstMatch(ot1) 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 Using where 1 SIMPLE it2 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(ot2) SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1) AND ot2.a IN (SELECT a FROM it2); a a 0 0 1 NULL 2 2 3 NULL 4 4 5 NULL 6 6 7 NULL # Example SQ3.4 explain SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a AND (ot1.a, ot2.a) IN (SELECT it1.a, it2.a FROM it1 JOIN it2 ON it1.a=it2.a); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 Start temporary 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE it2 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE it1 ALL NULL NULL NULL NULL 8 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a AND (ot1.a, ot2.a) IN (SELECT it1.a, it2.a FROM it1 JOIN it2 ON it1.a=it2.a); a a 0 0 1 NULL 2 2 3 NULL 4 4 5 NULL 6 6 7 NULL # More test cases SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a+0 AND ot1.a IN (SELECT a FROM it3); a a 0 0 1 NULL 2 NULL 3 NULL 4 NULL 5 NULL 6 6 7 NULL SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a AND ot1.a IN (SELECT a+0 FROM it3); a a 0 0 1 NULL 2 NULL 3 NULL 4 NULL 5 NULL 6 6 7 NULL SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a+0 AND ot2.a IN (SELECT a FROM it2); a a 0 0 1 NULL 2 2 3 NULL 4 4 5 NULL 6 6 7 NULL SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a AND ot2.a IN (SELECT a+0 FROM it2); a a 0 0 1 NULL 2 2 3 NULL 4 4 5 NULL 6 6 7 NULL SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a+0 AND ot1.a IN (SELECT a+0 FROM it1) AND ot2.a IN (SELECT a+0 FROM it2); a a 0 0 1 NULL 2 2 3 NULL 4 4 5 NULL 6 6 7 NULL SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a+0 AND (ot1.a, ot2.a) IN (SELECT it1.a+0, it2.a+0 FROM it1 JOIN it2 ON it1.a=it2.a); a a 0 0 1 NULL 2 2 3 NULL 4 4 5 NULL 6 6 7 NULL SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it3) LEFT JOIN ot3 ON ot2.a=ot3.a AND ot3.a IN (SELECT a FROM it3); a a a 0 0 0 1 NULL NULL 2 NULL NULL 3 NULL NULL 4 NULL NULL 5 NULL NULL 6 6 6 7 NULL NULL SELECT * FROM ot1 LEFT JOIN ot2 ON ot1.a=ot2.a+0 AND ot1.a IN (SELECT a FROM it3) LEFT JOIN ot3 ON ot2.a=ot3.a+0 AND ot3.a IN (SELECT a FROM it3); a a a 0 0 0 1 NULL NULL 2 NULL NULL 3 NULL NULL 4 NULL NULL 5 NULL NULL 6 6 6 7 NULL NULL # Test cases, Subquery Pattern 4 # Example SQ4.1: explain SELECT * FROM ot1 LEFT JOIN (ot2 JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 NULL 1 SIMPLE it1 ALL NULL NULL NULL NULL 8 Using where; FirstMatch(ot1) 1 SIMPLE ot3 ALL NULL NULL NULL NULL 3 NULL 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 Using where SELECT * FROM ot1 LEFT JOIN (ot2 JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1); a a a 0 0 0 1 NULL NULL 2 NULL NULL 3 NULL NULL 4 NULL NULL 5 NULL NULL 6 6 6 7 NULL NULL # Example SQ4.2: explain SELECT * FROM ot1 JOIN (ot2 JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot3 ALL NULL NULL NULL NULL 3 NULL 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE it1 ALL NULL NULL NULL NULL 8 Using where; FirstMatch(ot1); Using join buffer (Block Nested Loop) SELECT * FROM ot1 JOIN (ot2 JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1); a a a 0 0 0 6 6 6 # Example SQ4.3: explain SELECT * FROM ot1 JOIN (ot2 LEFT JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 NULL 1 SIMPLE ot3 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE it1 ALL NULL NULL NULL NULL 8 Using where; FirstMatch(ot1); Using join buffer (Block Nested Loop) SELECT * FROM ot1 JOIN (ot2 LEFT JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1); a a a 0 0 0 2 2 NULL 4 4 NULL 6 6 6 # Example SQ4.4: explain SELECT * FROM ot1 LEFT JOIN (ot2 LEFT JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 NULL 1 SIMPLE it1 ALL NULL NULL NULL NULL 8 Using where; FirstMatch(ot1) 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 Using where 1 SIMPLE ot3 ALL NULL NULL NULL NULL 3 Using where SELECT * FROM ot1 LEFT JOIN (ot2 LEFT JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1); a a a 0 0 0 1 NULL NULL 2 2 NULL 3 NULL NULL 4 4 NULL 5 NULL NULL 6 6 6 7 NULL NULL # More test cases SELECT * FROM ot1 LEFT JOIN (ot2 JOIN ot3 ON ot2.a=ot3.a+0) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1); a a a 0 0 0 1 NULL NULL 2 NULL NULL 3 NULL NULL 4 NULL NULL 5 NULL NULL 6 6 6 7 NULL NULL SELECT * FROM ot1 LEFT JOIN (ot2 JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a+0 AND ot1.a IN (SELECT a FROM it1); a a a 0 0 0 1 NULL NULL 2 NULL NULL 3 NULL NULL 4 NULL NULL 5 NULL NULL 6 6 6 7 NULL NULL SELECT * FROM ot1 LEFT JOIN (ot2 JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a+0 FROM it1); a a a 0 0 0 1 NULL NULL 2 NULL NULL 3 NULL NULL 4 NULL NULL 5 NULL NULL 6 6 6 7 NULL NULL SELECT * FROM ot1 JOIN (ot2 JOIN ot3 ON ot2.a=ot3.a+0) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1); a a a 0 0 0 6 6 6 SELECT * FROM ot1 JOIN (ot2 JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a+0 AND ot1.a IN (SELECT a FROM it1); a a a 0 0 0 6 6 6 SELECT * FROM ot1 JOIN (ot2 JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a+0 FROM it1); a a a 0 0 0 6 6 6 SELECT * FROM ot1 JOIN (ot2 LEFT JOIN ot3 ON ot2.a=ot3.a+0) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1); a a a 0 0 0 2 2 NULL 4 4 NULL 6 6 6 SELECT * FROM ot1 JOIN (ot2 LEFT JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a+0 AND ot1.a IN (SELECT a FROM it1); a a a 0 0 0 2 2 NULL 4 4 NULL 6 6 6 SELECT * FROM ot1 JOIN (ot2 LEFT JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a+0 FROM it1); a a a 0 0 0 2 2 NULL 4 4 NULL 6 6 6 SELECT * FROM ot1 LEFT JOIN (ot2 LEFT JOIN ot3 ON ot2.a=ot3.a+0) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1); a a a 0 0 0 1 NULL NULL 2 2 NULL 3 NULL NULL 4 4 NULL 5 NULL NULL 6 6 6 7 NULL NULL SELECT * FROM ot1 LEFT JOIN (ot2 LEFT JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a+0 AND ot1.a IN (SELECT a FROM it1); a a a 0 0 0 1 NULL NULL 2 2 NULL 3 NULL NULL 4 4 NULL 5 NULL NULL 6 6 6 7 NULL NULL SELECT * FROM ot1 LEFT JOIN (ot2 LEFT JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a+0 FROM it1); a a a 0 0 0 1 NULL NULL 2 2 NULL 3 NULL NULL 4 4 NULL 5 NULL NULL 6 6 6 7 NULL NULL SELECT * FROM ot1 LEFT JOIN (ot2 LEFT JOIN ot3 ON ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1) LEFT JOIN ot1 AS ot4 ON ot2.a=ot4.a; a a a a 0 0 0 0 1 NULL NULL NULL 2 2 NULL 2 3 NULL NULL NULL 4 4 NULL 4 5 NULL NULL NULL 6 6 6 6 7 NULL NULL NULL SELECT * FROM ot1 LEFT JOIN (ot2 LEFT JOIN ot3 ON ot2.a=ot3.a LEFT JOIN ot1 AS ot4 ON ot3.a=ot4.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a FROM it1); a a a a 0 0 0 0 1 NULL NULL NULL 2 2 NULL NULL 3 NULL NULL NULL 4 4 NULL NULL 5 NULL NULL NULL 6 6 6 6 7 NULL NULL NULL DROP TABLE ot1,ot2,ot3,it1,it2,it3; CREATE TABLE t ( a INTEGER DEFAULT NULL ) ENGINE=InnoDB; INSERT INTO t VALUES (1); CREATE TABLE t2 ( a INTEGER DEFAULT NULL ) ENGINE=InnoDB; INSERT INTO t2 VALUES (1),(1); CREATE TABLE t4 ( a INTEGER DEFAULT NULL ) ENGINE=InnoDB; INSERT INTO t4 VALUES (1),(1); CREATE TABLE v ( a INTEGER DEFAULT NULL ) ENGINE=InnoDB; INSERT INTO v VALUES (1),(1); explain SELECT * FROM t AS t1 LEFT JOIN (t2 LEFT JOIN t AS t3 ON t3.a IN (SELECT a FROM t AS it) JOIN t4 ON t4.a=100 ) ON TRUE WHERE t1.a IN (SELECT * FROM v AS it2); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 1 NULL 1 SIMPLE it2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE it ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t3) 1 SIMPLE t4 ALL NULL NULL NULL NULL 2 Using where SELECT * FROM t AS t1 LEFT JOIN (t2 LEFT JOIN t AS t3 ON t3.a IN (SELECT a FROM t AS it) JOIN t4 ON t4.a=100 ) ON TRUE WHERE t1.a IN (SELECT * FROM v AS it2); a a a a 1 NULL NULL NULL DROP TABLE t,t2,t4,v; # End of WL#5561 # # Bug#48868: Left outer join in subquery causes segmentation fault in # make_join_select. # CREATE TABLE t1 (i INTEGER); INSERT INTO t1 VALUES (1); INSERT INTO t1 VALUES (2); CREATE TABLE t2 (i INTEGER); INSERT INTO t2 VALUES(1); CREATE TABLE t3 (i INTEGER); INSERT INTO t3 VALUES (1); INSERT INTO t3 VALUES (2); SELECT * FROM t1 WHERE (t1.i) IN (SELECT t2.i FROM t2 LEFT JOIN t3 ON t2.i=t3.i); i 1 DROP TABLE t1, t2, t3; Bug#37899: Wrongly checked optimization prerequisite caused failed assertion. CREATE TABLE t1 ( `pk` int(11), `varchar_nokey` varchar(5) ); INSERT INTO t1 VALUES (1,'qk'),(2,'j'),(3,'aew'); SELECT * FROM t1 WHERE varchar_nokey IN ( SELECT varchar_nokey FROM t1 ) XOR pk = 30; pk varchar_nokey 1 qk 2 j 3 aew drop table t1; # # BUG#41842: Semi-join materialization strategy crashes when the upper query has HAVING # CREATE TABLE t1 ( pk int(11) NOT NULL AUTO_INCREMENT, int_nokey int(11) NOT NULL, time_key time NOT NULL, datetime_key datetime NOT NULL, datetime_nokey datetime NOT NULL, varchar_key varchar(1) NOT NULL, varchar_nokey varchar(1) NOT NULL, PRIMARY KEY (pk), KEY time_key (time_key), KEY datetime_key (datetime_key), KEY varchar_key (varchar_key) ); INSERT INTO t1 VALUES (1,0, '00:16:10','2008-09-03 14:25:40','2008-09-03 14:25:40','h','h'), (2,7, '00:00:00','2001-01-13 00:00:00','2001-01-13 00:00:00','',''), (3,0, '00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','x','x'), (4,2, '16:29:24','2000-10-16 01:39:08','2000-10-16 01:39:08','w','w'), (5,1, '09:23:32','0000-00-00 00:00:00','0000-00-00 00:00:00','p','p'), (6,3, '00:00:00','2007-12-02 00:00:00','2007-12-02 00:00:00','o','o'), (7,3, '00:00:00','2008-09-11 00:00:00','2008-09-11 00:00:00','',''), (8,0, '13:59:04','0000-00-00 00:00:00','0000-00-00 00:00:00','s','s'), (9,7, '09:01:06','0000-00-00 00:00:00','0000-00-00 00:00:00','d','d'), (10,5,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','n','n'), (11,0,'21:06:46','0000-00-00 00:00:00','0000-00-00 00:00:00','o','o'), (12,2,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','',''), (13,6,'14:45:34','2003-07-28 02:34:08','2003-07-28 02:34:08','w','w'), (14,1,'15:04:12','0000-00-00 00:00:00','0000-00-00 00:00:00','o','o'), (15,0,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','x','x'), (16,0,'15:55:23','2004-03-17 00:32:27','2004-03-17 00:32:27','p','p'), (17,1,'16:30:00','2004-12-27 19:20:00','2004-12-27 19:20:00','d','d'), (18,0,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','h','h'), (19,0,'14:13:26','2008-11-09 05:53:48','2008-11-09 05:53:48','o','o'), (20,0,'00:00:00','2009-10-11 06:58:04','2009-10-11 06:58:04','k','k'); CREATE TABLE t2 ( pk int(11) NOT NULL AUTO_INCREMENT, int_nokey int(11) NOT NULL, time_key time NOT NULL, datetime_key datetime NOT NULL, datetime_nokey datetime NOT NULL, varchar_key varchar(1) NOT NULL, varchar_nokey varchar(1) NOT NULL, PRIMARY KEY (pk), KEY time_key (time_key), KEY datetime_key (datetime_key), KEY varchar_key (varchar_key) ); INSERT INTO t2 VALUES (10,0,'19:39:13','0000-00-00 00:00:00','0000-00-00 00:00:00','g','g'), (11,8,'03:43:53','0000-00-00 00:00:00','0000-00-00 00:00:00','b','b'); SELECT OUTR.datetime_nokey AS X FROM t1 AS OUTR WHERE OUTR.varchar_nokey IN (SELECT INNR . varchar_nokey AS Y FROM t2 AS INNR WHERE INNR . datetime_key >= INNR . time_key OR INNR . pk = INNR . int_nokey ) AND OUTR . varchar_nokey <= 'w' HAVING X > '2012-12-12'; X drop table t1, t2; Bug#46797 "Crash in fix_semijoin_strategies_for_picked_join_order with semijoin=on" CREATE TABLE t1 ( varchar_key varchar(1) DEFAULT NULL, KEY varchar_key (varchar_key) ); CREATE TABLE t2 ( varchar_key varchar(1) DEFAULT NULL, KEY varchar_key (varchar_key) ); INSERT INTO t2 VALUES (NULL),(NULL),(NULL),(NULL),('a'),('a'),('a'),('b'),('b'),('b'),('b'),('c'), ('c'),('c'),('c'),('c'),('c'),('c'),('d'),('d'),('d'),('d'),('d'),('d'),('e'), ('e'),('e'),('e'),('e'),('e'),('f'),('f'),('f'),('g'),('g'),('h'),('h'),('h'), ('h'),('i'),('j'),('j'),('j'),('k'),('k'),('l'),('l'),('m'),('m'),('m'),('m'), ('n'),('n'),('n'),('o'),('o'),('o'),('p'),('p'),('p'),('q'),('q'),('q'),('r'), ('r'),('r'),('r'),('s'),('s'),('s'),('s'),('t'),('t'),('t'),('t'),('u'),('u'), ('u'),('u'),('v'),('v'),('v'),('v'),('w'),('w'),('w'),('w'),('w'),('w'),('x'), ('x'),('x'),('y'),('y'),('y'),('y'),('z'),('z'),('z'),('z'); CREATE TABLE t3 ( varchar_key varchar(1) DEFAULT NULL, KEY varchar_key (varchar_key) ) ENGINE=MyISAM DEFAULT CHARSET=latin1; INSERT INTO t3 VALUES (NULL),('c'),('d'),('e'),('f'),('h'),('j'),('k'),('k'),('m'),('m'),('m'), ('n'),('o'),('r'),('t'),('t'),('u'),('w'),('y'); SELECT varchar_key FROM t3 WHERE (SELECT varchar_key FROM t3 WHERE (varchar_key,varchar_key) IN (SELECT t1.varchar_key, t2 .varchar_key FROM t1 RIGHT JOIN t2 ON t1.varchar_key ) ); varchar_key DROP TABLE t1, t2, t3; # # Bug#46556 Returning incorrect, empty results for some IN subqueries # w/semijoin=on # CREATE TABLE t0 ( pk INTEGER, vkey VARCHAR(1), vnokey VARCHAR(1), PRIMARY KEY (pk), KEY vkey(vkey) ); INSERT INTO t0 VALUES (1,'g','g'), (2,'v','v'), (3,'t','t'), (4,'u','u'), (5,'n','n'); EXPLAIN EXTENDED SELECT vkey FROM t0 WHERE pk IN (SELECT t1.pk FROM t0 t1 JOIN t0 t2 ON t2.vkey = t1.vnokey); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL PRIMARY NULL NULL NULL 5 100.00 NULL 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t0.pk 1 100.00 NULL 1 SIMPLE t2 index vkey vkey 4 NULL 5 80.00 Using where; Using index; FirstMatch(t1); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t0`.`vkey` AS `vkey` from `test`.`t0` `t1` semi join (`test`.`t0` `t2`) join `test`.`t0` where ((`test`.`t2`.`vkey` = `test`.`t1`.`vnokey`) and (`test`.`t1`.`pk` = `test`.`t0`.`pk`)) SELECT vkey FROM t0 WHERE pk IN (SELECT t1.pk FROM t0 t1 JOIN t0 t2 ON t2.vkey = t1.vnokey); vkey g n t u v DROP TABLE t0; # End of bug#46556 Bug#48834: Procedure with view + subquery + semijoin=on crashes on second call. CREATE TABLE t1 ( t1field integer, primary key (t1field)); CREATE TABLE t2 ( t2field integer, primary key (t2field)); CREATE VIEW v1 AS SELECT t1field as v1field FROM t1 A WHERE A.t1field IN (SELECT t1field FROM t2 ); CREATE VIEW v2 AS SELECT t2field as v2field FROM t2 A WHERE A.t2field IN (SELECT t2field FROM t2 ); CREATE PROCEDURE p1 () BEGIN SELECT v1field FROM v1 WHERE v1field IN ( SELECT v2field as vf_inner FROM v2 ); END| INSERT INTO t1 VALUES (1),(2),(3); INSERT INTO t2 VALUES (2),(3),(4); CALL p1; v1field 2 3 CALL p1; v1field 2 3 DROP TABLE t1,t2; DROP VIEW v1,v2; DROP PROCEDURE p1; # End of BUG#48834 # # Bug#46692 "Crash occurring on queries with nested FROM subqueries # using materialization." # CREATE TABLE t1 ( pk INTEGER PRIMARY KEY, int_key INTEGER, KEY int_key(int_key) ); INSERT INTO t1 VALUES (10,186),(11,NULL),(12,2),(13,3),(14,0),(15,133),(16,1); CREATE TABLE t2 ( pk INTEGER PRIMARY KEY, int_key INTEGER, KEY int_key(int_key) ); INSERT INTO t2 VALUES (1,7),(2,2); SELECT * FROM t1 WHERE (140, 4) IN (SELECT t2.int_key, t2 .pk FROM t2 STRAIGHT_JOIN t1 ON t2.int_key); pk int_key DROP TABLE t1, t2; # # Bug#42353 "SELECT ... WHERE oe IN (SELECT w/ LEFT JOIN) query # causes crash." # CREATE TABLE t1 ( pk INTEGER PRIMARY KEY, int_nokey INTEGER, int_key INTEGER, date_key DATE, datetime_nokey DATETIME, varchar_nokey VARCHAR(1) ); CREATE TABLE t2 ( date_nokey DATE ); CREATE TABLE t3 ( pk INTEGER PRIMARY KEY, int_nokey INTEGER, date_key date, varchar_key VARCHAR(1), varchar_nokey VARCHAR(1), KEY date_key (date_key) ); SELECT date_key FROM t1 WHERE (int_key, int_nokey) IN (SELECT t3.int_nokey, t3.pk FROM t2 LEFT JOIN t3 ON (t2.date_nokey < t3.date_key) WHERE t3.varchar_key <= t3.varchar_nokey OR t3.int_nokey <= t3.pk ) AND (varchar_nokey <> 'f' OR NOT int_key < 7); date_key # # Bug#45933 "Crash in optimize_semijoin_nests on JOIN in subquery # + AND in outer query". # INSERT INTO t1 VALUES (10,7,5,'2009-06-16','2002-04-10 14:25:30','w'), (11,7,0,'0000-00-00','0000-00-00 00:00:00','s'), (12,4,0,'2003-07-14','2006-09-14 04:01:02','y'), (13,0,4,'2002-07-25','0000-00-00 00:00:00','c'), (14,1,8,'2007-07-03','0000-00-00 00:00:00','q'), (15,6,5,'2001-11-12','0000-00-00 00:00:00',''), (16,2,9,'0000-00-00','0000-00-00 00:00:00','j'), (29,9,1,'0000-00-00','2003-08-11 00:00:00','m'); INSERT INTO t3 VALUES (1,9,'0000-00-00','b','b'), (2,2,'2002-09-17','h','h'); SELECT t1.varchar_nokey FROM t1 JOIN t3 ON t1.datetime_nokey WHERE t1.varchar_nokey IN (SELECT varchar_nokey FROM t1 WHERE (pk) IN (SELECT t3.int_nokey FROM t3 LEFT JOIN t1 ON t1.varchar_nokey WHERE t3.date_key BETWEEN '2008-06-07' AND '2006-06-26' ) ); varchar_nokey DROP TABLE t1, t2, t3; # # Bug#45219 "Crash on SELECT DISTINCT query containing a # LEFT JOIN in subquery" # CREATE TABLE t1 ( pk INTEGER NOT NULL, int_nokey INTEGER NOT NULL, datetime_key DATETIME NOT NULL, varchar_key VARCHAR(1) NOT NULL, PRIMARY KEY (pk), KEY datetime_key (datetime_key), KEY varchar_key (varchar_key) ); INSERT INTO t1 VALUES (1,9,'0000-00-00 00:00:00','p'),(2,0,'2002-02-09 07:38:13','v'), (3,8,'2001-05-03 12:08:14','t'),(4,3,'0000-00-00 00:00:00','u'), (5,7,'2009-07-28 03:43:30','n'),(6,0,'2009-08-04 00:00:00','l'), (7,1,'0000-00-00 00:00:00','h'),(8,9,'0000-00-00 00:00:00','u'), (9,0,'2005-08-02 17:16:54','n'),(10,9,'2002-12-21 00:00:00','j'), (11,0,'2005-08-15 12:37:35','k'),(12,5,'0000-00-00 00:00:00','e'), (13,0,'2006-03-10 00:00:00','i'),(14,8,'2005-05-16 11:02:36','u'), (15,8,'2008-11-02 00:00:00','n'),(16,5,'2006-03-15 00:00:00','b'), (17,1,'0000-00-00 00:00:00','x'),(18,7,'0000-00-00 00:00:00',''), (19,0,'2008-12-17 20:15:40','q'),(20,9,'0000-00-00 00:00:00','u'); CREATE TABLE t2 LIKE t1; INSERT INTO t2 VALUES (10,0,'2006-07-07 07:26:28','q'),(11,5,'2002-09-23 00:00:00','m'), (12,7,'0000-00-00 00:00:00','j'),(13,1,'2006-06-07 00:00:00','z'), (14,8,'2000-09-16 12:15:34','a'),(15,2,'2007-08-05 15:47:52',''), (16,1,'0000-00-00 00:00:00','e'),(17,8,'2005-12-02 19:34:26','t'), (18,5,'0000-00-00 00:00:00','q'),(19,4,'0000-00-00 00:00:00','b'), (20,5,'2007-12-28 00:00:00','w'),(21,3,'2004-08-02 11:48:43','m'), (22,0,'0000-00-00 00:00:00','x'),(23,8,'2004-04-19 12:18:43',''), (24,0,'2009-04-27 00:00:00','w'),(25,4,'2006-10-20 14:52:15','x'), (26,0,'0000-00-00 00:00:00','e'),(27,0,'2002-03-22 11:48:37','e'), (28,2,'0000-00-00 00:00:00','p'),(29,0,'2001-01-04 03:55:07','x'); CREATE TABLE t3 LIKE t1; INSERT INTO t3 VALUES (10,8,'2007-08-19 08:08:38','i'),(11,0,'2000-05-21 03:51:51',''); SELECT DISTINCT datetime_key FROM t1 WHERE (int_nokey, pk) IN (SELECT t3.pk, t3.pk FROM t2 LEFT JOIN t3 ON t3.varchar_key) AND pk = 9; datetime_key DROP TABLE t1, t2, t3; # # Bug#46550 Azalea returning duplicate results for some IN subqueries # w/ semijoin=on # DROP TABLE IF EXISTS t0, t1, t2; CREATE TABLE t0 ( int_key int(11) DEFAULT NULL, varchar_key varchar(1) DEFAULT NULL, varchar_nokey varchar(1) DEFAULT NULL, KEY int_key (int_key), KEY varchar_key (varchar_key,int_key) ); INSERT INTO t0 VALUES (1,'m','m'), (40,'h','h'), (1,'r','r'), (1,'h','h'), (9,'x','x'), (NULL,'q','q'), (NULL,'k','k'), (7,'l','l'), (182,'k','k'), (202,'a','a'), (7,'x','x'), (6,'j','j'), (119,'z','z'), (4,'d','d'), (5,'h','h'), (1,'u','u'), (3,'q','q'), (7,'a','a'), (3,'e','e'), (6,'l','l'); CREATE TABLE t1 ( int_key int(11) DEFAULT NULL, varchar_key varchar(1) DEFAULT NULL, varchar_nokey varchar(1) DEFAULT NULL, KEY int_key (int_key), KEY varchar_key (varchar_key,int_key) ); INSERT INTO t1 VALUES (7,NULL,NULL),(4,'x','x'); CREATE TABLE t2 ( int_key int(11) DEFAULT NULL, varchar_key varchar(1) DEFAULT NULL, varchar_nokey varchar(1) DEFAULT NULL, KEY int_key (int_key), KEY varchar_key (varchar_key,int_key) ); INSERT INTO t2 VALUES (123,NULL,NULL); SELECT int_key FROM t0 WHERE varchar_nokey IN ( SELECT t1 .varchar_key from t1 ); int_key 9 7 SELECT t0.int_key FROM t0 WHERE t0.varchar_nokey IN ( SELECT t1_1 .varchar_key FROM t1 AS t1_1 JOIN t1 AS t1_2 ON t1_1 .int_key ); int_key 9 7 EXPLAIN SELECT t0.int_key FROM t0 WHERE t0.varchar_nokey IN ( SELECT t1_1 .varchar_key FROM t1 AS t1_1 JOIN t1 AS t1_2 ON t1_1 .int_key ); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1_1 index varchar_key varchar_key 9 NULL 2 Using where; Using index; Start temporary 1 SIMPLE t1_2 index NULL int_key 5 NULL 2 Using index; Using join buffer (Block Nested Loop) 1 SIMPLE t0 ALL NULL NULL NULL NULL 20 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT t0.int_key FROM t0, t2 WHERE t0.varchar_nokey IN ( SELECT t1_1 .varchar_key FROM t1 AS t1_1 JOIN t1 AS t1_2 ON t1_1 .int_key ); int_key 9 7 EXPLAIN SELECT t0.int_key FROM t0, t2 WHERE t0.varchar_nokey IN ( SELECT t1_1 .varchar_key FROM t1 AS t1_1 JOIN t1 AS t1_2 ON t1_1 .int_key ); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t1_1 index varchar_key varchar_key 9 NULL 2 Using where; Using index; Start temporary 1 SIMPLE t1_2 index NULL int_key 5 NULL 2 Using index; Using join buffer (Block Nested Loop) 1 SIMPLE t0 ALL NULL NULL NULL NULL 20 Using where; End temporary; Using join buffer (Block Nested Loop) DROP TABLE t0, t1, t2; # End of bug#46550 Bug #48073 Subquery on char columns from view crashes Mysql DROP TABLE IF EXISTS t1, t2; DROP VIEW IF EXISTS v1; CREATE TABLE t1 ( city VARCHAR(50) NOT NULL, country_id SMALLINT UNSIGNED NOT NULL ); INSERT INTO t1 VALUES ('Batna',2), ('Bchar',2), ('Skikda',2), ('Tafuna',3), ('Algeria',2) ; CREATE TABLE t2 ( country_id SMALLINT UNSIGNED NOT NULL, country VARCHAR(50) NOT NULL ); INSERT INTO t2 VALUES (2,'Algeria'), (3,'American Samoa') ; CREATE VIEW v1 AS SELECT country_id, country FROM t2 WHERE LEFT(country,1) = "A" ; SELECT city, country_id FROM t1 WHERE city IN ( SELECT country FROM t2 WHERE LEFT(country, 1) = "A" ); city country_id Algeria 2 SELECT city, country_id FROM t1 WHERE city IN ( SELECT country FROM v1 ); city country_id Algeria 2 drop table t1, t2; drop view v1; # End of bug#48073 Bug#49097 subquery with view generates wrong result with non-prepared statement DROP TABLE IF EXISTS t1, t2; DROP VIEW IF EXISTS v1; CREATE TABLE t1 ( city VARCHAR(50) NOT NULL, country_id SMALLINT UNSIGNED NOT NULL ); INSERT INTO t1 VALUES ('Batna',2), ('Bchar',2), ('Skikda',2), ('Tafuna',3), ('Algeria',2) ; CREATE TABLE t2 ( country_id SMALLINT UNSIGNED NOT NULL, country VARCHAR(50) NOT NULL ); INSERT INTO t2 VALUES (2,'Algeria'), (3,'XAmerican Samoa') ; CREATE VIEW v1 AS SELECT country_id, country FROM t2 WHERE LEFT(country,1) = "A" ; SELECT city, country_id FROM t1 WHERE country_id IN ( SELECT country_id FROM t2 WHERE LEFT(country,1) = "A" ); city country_id Batna 2 Bchar 2 Skikda 2 Algeria 2 SELECT city, country_id FROM t1 WHERE country_id IN ( SELECT country_id FROM v1 ); city country_id Batna 2 Bchar 2 Skikda 2 Algeria 2 PREPARE stmt FROM " SELECT city, country_id FROM t1 WHERE country_id IN ( SELECT country_id FROM v1 ); "; execute stmt; city country_id Batna 2 Bchar 2 Skikda 2 Algeria 2 deallocate prepare stmt; drop table t1, t2; drop view v1; # End of Bug#49097 # # Bug#49198 Wrong result for second call of procedure # with view in subselect. # CREATE TABLE t1 (t1field integer, primary key (t1field)); CREATE TABLE t2 (t2field integer, primary key (t2field)); CREATE TABLE t3 (t3field integer, primary key (t3field)); CREATE VIEW v2 AS SELECT * FROM t2; CREATE VIEW v3 AS SELECT * FROM t3; INSERT INTO t1 VALUES(1),(2); INSERT INTO t2 VALUES(1),(2); INSERT INTO t3 VALUES(1),(2); PREPARE stmt FROM " SELECT t1field FROM t1 WHERE t1field IN (SELECT * FROM v2); "; EXECUTE stmt; t1field 1 2 EXECUTE stmt; t1field 1 2 PREPARE stmt FROM " EXPLAIN SELECT t1field FROM t1 WHERE t1field IN (SELECT * FROM v2) AND t1field IN (SELECT * FROM v3) "; EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 2 Using index 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 2 Using index 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index DROP TABLE t1, t2, t3; DROP VIEW v2, v3; # End of Bug#49198 # # Bug#48623 Multiple subqueries are optimized incorrectly # CREATE TABLE ot(val VARCHAR(10)); CREATE TABLE it1(val VARCHAR(10)); CREATE TABLE it2(val VARCHAR(10)); INSERT INTO ot VALUES('aaa'), ('bbb'), ('eee'), ('mmm'), ('ppp'); INSERT INTO it1 VALUES('aaa'), ('aaa'), ('bbb'), ('eee'), ('mmm'), ('ppp'); INSERT INTO it2 VALUES('aaa'), ('bbb'), ('eee'), ('mmm'), ('ppp'); EXPLAIN SELECT * FROM ot WHERE ot.val IN (SELECT it1.val FROM it1 WHERE it1.val LIKE 'a%' OR it1.val LIKE 'e%') AND ot.val IN (SELECT it2.val FROM it2 WHERE it2.val LIKE 'a%' OR it2.val LIKE 'e%'); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot ALL NULL NULL NULL NULL 5 NULL 1 SIMPLE it2 ALL NULL NULL NULL NULL 5 Using where; FirstMatch(ot); Using join buffer (Block Nested Loop) 1 SIMPLE it1 ALL NULL NULL NULL NULL 6 Using where; FirstMatch(it2); Using join buffer (Block Nested Loop) SELECT * FROM ot WHERE ot.val IN (SELECT it1.val FROM it1 WHERE it1.val LIKE 'a%' OR it1.val LIKE 'e%') AND ot.val IN (SELECT it2.val FROM it2 WHERE it2.val LIKE 'a%' OR it2.val LIKE 'e%'); val aaa eee DROP TABLE ot; DROP TABLE it1; DROP TABLE it2; # End of Bug#48623 # # Bug #51487 Assertion failure when semi-join flattening occurs # for a subquery in HAVING # CREATE TABLE t1 (a INT, b INT); INSERT INTO t1 VALUES (1,10),(2,11),(1,13); CREATE TABLE t2 AS SELECT * FROM t1; CREATE TABLE t3 AS SELECT * FROM t1; SELECT COUNT(*) FROM t1 GROUP BY t1.a HAVING t1.a IN (SELECT t3.a FROM t3 WHERE t3.b IN (SELECT b FROM t2 WHERE t2.a=t1.a)); COUNT(*) 2 1 DROP TABLE t1, t2, t3; # End of Bug#51487 # # BUG#38075: Wrong result: rows matching a subquery with outer join not returned # DROP TABLE IF EXISTS ot1, it1, it2; CREATE TABLE it2 ( int_key int(11) NOT NULL, datetime_key datetime NOT NULL, KEY int_key (int_key), KEY datetime_key (datetime_key) ); INSERT INTO it2 VALUES (5,'2002-04-10 14:25:30'), (0,'0000-00-00 00:00:00'), (0,'2006-09-14 04:01:02'), (4,'0000-00-00 00:00:00'), (8,'0000-00-00 00:00:00'), (5,'0000-00-00 00:00:00'), (9,'0000-00-00 00:00:00'), (8,'2007-04-01 11:04:17'), (1,'0000-00-00 00:00:00'), (7,'2009-01-12 00:00:00'), (0,'2009-06-05 00:00:00'), (3,'2006-02-14 18:06:35'), (5,'2006-02-21 07:08:16'), (0,'0000-00-00 00:00:00'), (7,'0000-00-00 00:00:00'), (0,'0000-00-00 00:00:00'), (0,'2007-02-13 00:00:00'), (1,'0000-00-00 00:00:00'), (0,'0000-00-00 00:00:00'), (1,'2003-08-11 00:00:00'); CREATE TABLE ot1 ( int_nokey int(11) NOT NULL, int_key int(11) NOT NULL, KEY int_key (int_key) ); INSERT INTO ot1 VALUES (5,0), (3,0), (0,2), (3,0), (1,3), (0,0), (1,7), (7,0), (1,7), (0,7), (0,9), (8,2), (4,4), (9,3), (0,9), (2,5), (0,5), (8,0), (5,8), (1,5); CREATE TABLE it1 ( int_nokey int(11) NOT NULL, int_key int(11) NOT NULL, KEY int_key (int_key) ); INSERT INTO it1 VALUES (9,5), (0,4); SELECT int_key FROM ot1 WHERE int_nokey IN (SELECT it2.int_key FROM it1 LEFT JOIN it2 ON it2.datetime_key); int_key 0 0 0 0 0 0 2 2 3 5 5 7 7 7 8 9 9 EXPLAIN SELECT int_key FROM ot1 WHERE int_nokey IN (SELECT it2.int_key FROM it1 LEFT JOIN it2 ON it2.datetime_key); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE it1 index NULL int_key 4 NULL 2 Using index; Start temporary 1 SIMPLE ot1 ALL NULL NULL NULL NULL 20 Using join buffer (Block Nested Loop) 1 SIMPLE it2 ref int_key int_key 4 test.ot1.int_nokey 2 Using where; End temporary DROP TABLE ot1, it1, it2; # End of BUG#38075 # # BUG#50089: Second call of procedure with view in subselect crashes server # CREATE TABLE t1(t1field INTEGER, PRIMARY KEY(t1field)); CREATE VIEW v1 AS SELECT t1field AS v1field FROM t1 a WHERE a.t1field IN (SELECT t1field FROM t1); INSERT INTO t1 VALUES(1),(2); SELECT t1field FROM t1 WHERE t1field IN (SELECT v1field FROM v1); t1field 1 2 EXPLAIN SELECT t1field FROM t1 WHERE t1field IN (SELECT v1field FROM v1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 2 Using index 1 SIMPLE a eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index SELECT t1.t1field FROM t1 LEFT JOIN t1 AS t2 ON t1.t1field IN (SELECT v1field FROM v1); t1field 1 1 2 2 EXPLAIN SELECT t1field FROM t1 WHERE t1field IN (SELECT v1field FROM v1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 2 Using index 1 SIMPLE a eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index CREATE PROCEDURE p1() BEGIN SELECT t1field FROM t1 WHERE t1field IN (SELECT v1field FROM v1); END| CALL p1; t1field 1 2 CALL p1; t1field 1 2 PREPARE stmt FROM " SELECT t1field FROM t1 WHERE t1field IN (SELECT v1field FROM v1); "; EXECUTE stmt; t1field 1 2 EXECUTE stmt; t1field 1 2 DROP PROCEDURE p1; DROP VIEW v1; DROP TABLE t1; # End of BUG#50089 # # Bug#45191: Incorrectly initialized semi-join led to a wrong result. # CREATE TABLE STAFF (EMPNUM CHAR(3) NOT NULL, EMPNAME CHAR(20), GRADE DECIMAL(4), CITY CHAR(15)); CREATE TABLE PROJ (PNUM CHAR(3) NOT NULL, PNAME CHAR(20), PTYPE CHAR(6), BUDGET DECIMAL(9), CITY CHAR(15)); CREATE TABLE WORKS (EMPNUM CHAR(3) NOT NULL, PNUM CHAR(3) NOT NULL, HOURS DECIMAL(5)); INSERT INTO STAFF VALUES ('E1','Alice',12,'Deale'); INSERT INTO STAFF VALUES ('E2','Betty',10,'Vienna'); INSERT INTO STAFF VALUES ('E3','Carmen',13,'Vienna'); INSERT INTO STAFF VALUES ('E4','Don',12,'Deale'); INSERT INTO STAFF VALUES ('E5','Ed',13,'Akron'); INSERT INTO PROJ VALUES ('P1','MXSS','Design',10000,'Deale'); INSERT INTO PROJ VALUES ('P2','CALM','Code',30000,'Vienna'); INSERT INTO PROJ VALUES ('P3','SDP','Test',30000,'Tampa'); INSERT INTO PROJ VALUES ('P4','SDP','Design',20000,'Deale'); INSERT INTO PROJ VALUES ('P5','IRM','Test',10000,'Vienna'); INSERT INTO PROJ VALUES ('P6','PAYR','Design',50000,'Deale'); INSERT INTO WORKS VALUES ('E1','P1',40); INSERT INTO WORKS VALUES ('E1','P2',20); INSERT INTO WORKS VALUES ('E1','P3',80); INSERT INTO WORKS VALUES ('E1','P4',20); INSERT INTO WORKS VALUES ('E1','P5',12); INSERT INTO WORKS VALUES ('E1','P6',12); INSERT INTO WORKS VALUES ('E2','P1',40); INSERT INTO WORKS VALUES ('E2','P2',80); INSERT INTO WORKS VALUES ('E3','P2',20); INSERT INTO WORKS VALUES ('E4','P2',20); INSERT INTO WORKS VALUES ('E4','P4',40); INSERT INTO WORKS VALUES ('E4','P5',80); explain SELECT EMPNUM, EMPNAME FROM STAFF WHERE EMPNUM IN (SELECT EMPNUM FROM WORKS WHERE PNUM IN (SELECT PNUM FROM PROJ)); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE STAFF ALL NULL NULL NULL NULL 5 NULL 1 SIMPLE PROJ ALL NULL NULL NULL NULL 6 NULL 1 SIMPLE WORKS ALL NULL NULL NULL NULL 12 Using where; FirstMatch(STAFF) SELECT EMPNUM, EMPNAME FROM STAFF WHERE EMPNUM IN (SELECT EMPNUM FROM WORKS WHERE PNUM IN (SELECT PNUM FROM PROJ)); EMPNUM EMPNAME E1 Alice E2 Betty E3 Carmen E4 Don drop table STAFF,WORKS,PROJ; # End of bug#45191 # # BUG#36896: Server crash on SELECT FROM DUAL # create table t1 (a int); select 1 as res from dual where (1) in (select * from t1); res drop table t1; BUG#40118 Crash when running Batched Key Access and requiring one match for each key create table t0(a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t1 (a int, key(a)); insert into t1 select * from t0; alter table t1 add b int not null, add filler char(200); insert into t1 select * from t1; insert into t1 select * from t1; select * from t0 where t0.a in (select t1.a from t1 where t1.b=0); a 0 1 2 3 4 5 6 7 8 9 drop table t0, t1; # # BUG#32665 Query with dependent subquery is too slow # create table t1 ( idIndividual int primary key ); insert into t1 values (1),(2); create table t2 ( idContact int primary key, contactType int, idObj int ); insert into t2 values (1,1,1),(2,2,2),(3,3,3); create table t3 ( idAddress int primary key, idContact int, postalStripped varchar(100) ); insert into t3 values (1,1, 'foo'), (2,2,'bar'); The following must be converted to a semi-join: explain extended SELECT a.idIndividual FROM t1 a WHERE a.idIndividual IN ( SELECT c.idObj FROM t3 cona INNER JOIN t2 c ON c.idContact=cona.idContact WHERE cona.postalStripped='T2H3B2' ); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE cona ALL NULL NULL NULL NULL 2 100.00 Using where; Start temporary 1 SIMPLE c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00 Using where 1 SIMPLE a eq_ref PRIMARY PRIMARY 4 test.c.idObj 1 100.00 Using index; End temporary Warnings: Note 1003 /* select#1 */ select `test`.`a`.`idIndividual` AS `idIndividual` from `test`.`t1` `a` semi join (`test`.`t3` `cona` join `test`.`t2` `c`) where ((`test`.`c`.`idContact` = `test`.`cona`.`idContact`) and (`test`.`a`.`idIndividual` = `test`.`c`.`idObj`) and (`test`.`cona`.`postalStripped` = 'T2H3B2')) drop table t1,t2,t3; CREATE TABLE t1 (one int, two int, flag char(1)); CREATE TABLE t2 (one int, two int, flag char(1)); INSERT INTO t1 VALUES(1,2,'Y'),(2,3,'Y'),(3,4,'Y'),(5,6,'N'),(7,8,'N'); INSERT INTO t2 VALUES(1,2,'Y'),(2,3,'Y'),(3,4,'Y'),(5,6,'N'),(7,8,'N'); SELECT * FROM t1 WHERE ROW(one,two) IN (SELECT DISTINCT one,two FROM t2 WHERE flag = 'N'); one two flag 5 6 N 7 8 N SELECT * FROM t1 WHERE ROW(one,two) IN (SELECT DISTINCT one,two FROM t1 WHERE flag = 'N'); one two flag 5 6 N 7 8 N insert into t2 values (null,null,'N'); insert into t2 values (null,3,'0'); insert into t2 values (null,5,'0'); insert into t2 values (10,null,'0'); insert into t1 values (10,3,'0'); insert into t1 values (10,5,'0'); insert into t1 values (10,10,'0'); SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N') as 'test' from t1; one two test 1 2 NULL 2 3 NULL 3 4 NULL 5 6 1 7 8 1 10 3 NULL 10 5 NULL 10 10 NULL SELECT one,two from t1 where ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N'); one two 5 6 7 8 SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N' group by one,two) as 'test' from t1; one two test 1 2 NULL 2 3 NULL 3 4 NULL 5 6 1 7 8 1 10 3 NULL 10 5 NULL 10 10 NULL SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = '0') as 'test' from t1; one two test 1 2 0 2 3 NULL 3 4 0 5 6 0 7 8 0 10 3 NULL 10 5 NULL 10 10 NULL SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = '0' group by one,two) as 'test' from t1; one two test 1 2 0 2 3 NULL 3 4 0 5 6 0 7 8 0 10 3 NULL 10 5 NULL 10 10 NULL explain extended SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = '0') as 'test' from t1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 8 100.00 NULL 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),<exists>(/* select#2 */ select 1,1 from `test`.`t2` where ((`test`.`t2`.`flag` = '0') and <if>(outer_field_is_not_null, ((<cache>(`test`.`t1`.`one`) = `test`.`t2`.`one`) or isnull(`test`.`t2`.`one`)), true) and <if>(outer_field_is_not_null, ((<cache>(`test`.`t1`.`two`) = `test`.`t2`.`two`) or isnull(`test`.`t2`.`two`)), true)) having (<if>(outer_field_is_not_null, <is_not_null_test>(`test`.`t2`.`one`), true) and <if>(outer_field_is_not_null, <is_not_null_test>(`test`.`t2`.`two`), true)))) AS `test` from `test`.`t1` explain extended SELECT one,two from t1 where ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 8 100.00 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 9 100.00 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`two` = `test`.`t1`.`two`) and (`test`.`t2`.`one` = `test`.`t1`.`one`) and (`test`.`t2`.`flag` = 'N')) explain extended SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = '0' group by one,two) as 'test' from t1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 8 100.00 NULL 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),<exists>(/* select#2 */ select 1,1 from `test`.`t2` where ((`test`.`t2`.`flag` = '0') and <if>(outer_field_is_not_null, ((<cache>(`test`.`t1`.`one`) = `test`.`t2`.`one`) or isnull(`test`.`t2`.`one`)), true) and <if>(outer_field_is_not_null, ((<cache>(`test`.`t1`.`two`) = `test`.`t2`.`two`) or isnull(`test`.`t2`.`two`)), true)) having (<if>(outer_field_is_not_null, <is_not_null_test>(`test`.`t2`.`one`), true) and <if>(outer_field_is_not_null, <is_not_null_test>(`test`.`t2`.`two`), true)))) AS `test` from `test`.`t1` DROP TABLE t1,t2; CREATE TABLE t1 (a char(5), b char(5)); INSERT INTO t1 VALUES (NULL,'aaa'), ('aaa','aaa'); SELECT * FROM t1 WHERE (a,b) IN (('aaa','aaa'), ('aaa','bbb')); a b aaa aaa DROP TABLE t1; CREATE TABLE t1 (a CHAR(1), b VARCHAR(10)); INSERT INTO t1 VALUES ('a', 'aa'); INSERT INTO t1 VALUES ('a', 'aaa'); SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1); a b CREATE INDEX I1 ON t1 (a); CREATE INDEX I2 ON t1 (b); EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL I2 NULL NULL NULL 2 NULL 1 SIMPLE t1 index I1 I1 2 NULL 2 Using where; Using index; FirstMatch(t1); Using join buffer (Block Nested Loop) SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1); a b CREATE TABLE t2 (a VARCHAR(1), b VARCHAR(10)); INSERT INTO t2 SELECT * FROM t1; CREATE INDEX I1 ON t2 (a); CREATE INDEX I2 ON t2 (b); EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL I2 NULL NULL NULL 2 NULL 1 SIMPLE t2 index I1 I1 4 NULL 2 Using where; Using index; FirstMatch(t2); Using join buffer (Block Nested Loop) SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2); a b EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL I2 NULL NULL NULL 2 NULL 1 SIMPLE t1 index I1 I1 2 NULL 2 Using where; Using index; FirstMatch(t1); Using join buffer (Block Nested Loop) SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500); a b DROP TABLE t1,t2; # # BUG#45928 "Differing query results depending on MRR and # engine_condition_pushdown settings" # CREATE TABLE `t1` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `time_nokey` time NOT NULL, `varchar_key` varchar(1) NOT NULL, `varchar_nokey` varchar(1) NOT NULL, PRIMARY KEY (`pk`), KEY `varchar_key` (`varchar_key`) ) AUTO_INCREMENT=12 DEFAULT CHARSET=latin1; INSERT INTO `t1` VALUES (10,'00:00:00','i','i'),(11,'00:00:00','',''); SELECT `time_nokey` G1 FROM t1 WHERE ( `varchar_nokey` , `varchar_key` ) IN ( SELECT `varchar_nokey` , `varchar_nokey` ) AND `varchar_key` >= 'c' HAVING G1 ORDER BY `pk` ; G1 DROP TABLE t1; # # BUG#45863 "Assertion failed: (fixed == 0), function fix_fields(), # file item.cc, line 4448" # DROP TABLE IF EXISTS C, BB; CREATE TABLE C ( varchar_nokey varchar(1) NOT NULL ); INSERT INTO C VALUES ('k'),('a'),(''),('u'),('e'),('v'),('i'), ('t'),('u'),('f'),('u'),('m'),('j'),('f'), ('v'),('j'),('g'),('e'),('h'),('z'); CREATE TABLE BB ( varchar_nokey varchar(1) NOT NULL ); INSERT INTO BB VALUES ('i'),('t'); SELECT varchar_nokey FROM C WHERE (varchar_nokey, OUTR) IN (SELECT varchar_nokey FROM BB); ERROR 42S22: Unknown column 'OUTR' in 'IN/ALL/ANY subquery' SELECT varchar_nokey FROM C WHERE (varchar_nokey, OUTR) IN (SELECT varchar_nokey, varchar_nokey FROM BB); ERROR 42S22: Unknown column 'OUTR' in 'IN/ALL/ANY subquery' DROP TABLE C,BB; # # During work with BUG#45863 I had problems with a query that was # optimized differently in regular and prepared mode. # Because there was a bug in one of the selected strategies, I became # aware of the problem. Adding an EXPLAIN query to catch this. DROP TABLE IF EXISTS t1, t2, t3; CREATE TABLE t1 (EMPNUM CHAR(3) NOT NULL, EMPNAME CHAR(20), GRADE DECIMAL(4), CITY CHAR(15)); CREATE TABLE t2 (PNUM CHAR(3) NOT NULL, PNAME CHAR(20), PTYPE CHAR(6), BUDGET DECIMAL(9), CITY CHAR(15)); CREATE TABLE t3 (EMPNUM CHAR(3) NOT NULL, PNUM CHAR(3) NOT NULL, HOURS DECIMAL(5)); INSERT INTO t1 VALUES ('E1','Alice',12,'Deale'); INSERT INTO t1 VALUES ('E2','Betty',10,'Vienna'); INSERT INTO t1 VALUES ('E3','Carmen',13,'Vienna'); INSERT INTO t1 VALUES ('E4','Don',12,'Deale'); INSERT INTO t1 VALUES ('E5','Ed',13,'Akron'); INSERT INTO t2 VALUES ('P1','MXSS','Design',10000,'Deale'); INSERT INTO t2 VALUES ('P2','CALM','Code',30000,'Vienna'); INSERT INTO t2 VALUES ('P3','SDP','Test',30000,'Tampa'); INSERT INTO t2 VALUES ('P4','SDP','Design',20000,'Deale'); INSERT INTO t2 VALUES ('P5','IRM','Test',10000,'Vienna'); INSERT INTO t2 VALUES ('P6','PAYR','Design',50000,'Deale'); INSERT INTO t3 VALUES ('E1','P1',40); INSERT INTO t3 VALUES ('E1','P2',20); INSERT INTO t3 VALUES ('E1','P3',80); INSERT INTO t3 VALUES ('E1','P4',20); INSERT INTO t3 VALUES ('E1','P5',12); INSERT INTO t3 VALUES ('E1','P6',12); INSERT INTO t3 VALUES ('E2','P1',40); INSERT INTO t3 VALUES ('E2','P2',80); INSERT INTO t3 VALUES ('E3','P2',20); INSERT INTO t3 VALUES ('E4','P2',20); INSERT INTO t3 VALUES ('E4','P4',40); INSERT INTO t3 VALUES ('E4','P5',80); CREATE UNIQUE INDEX t1_IDX ON t1(EMPNUM); EXPLAIN SELECT EMPNAME FROM t1 WHERE EMPNUM IN (SELECT EMPNUM FROM t3 WHERE PNUM IN (SELECT PNUM FROM t2 WHERE PTYPE = 'Design')); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 eq_ref t1_IDX t1_IDX 3 test.t3.EMPNUM 1 End temporary PREPARE stmt FROM "EXPLAIN SELECT EMPNAME FROM t1 WHERE EMPNUM IN (SELECT EMPNUM FROM t3 WHERE PNUM IN (SELECT PNUM FROM t2 WHERE PTYPE = 'Design'))"; EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 eq_ref t1_IDX t1_IDX 3 test.t3.EMPNUM 1 End temporary EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 eq_ref t1_IDX t1_IDX 3 test.t3.EMPNUM 1 End temporary DEALLOCATE PREPARE stmt; DROP INDEX t1_IDX ON t1; CREATE INDEX t1_IDX ON t1(EMPNUM); EXPLAIN SELECT EMPNAME FROM t1 WHERE EMPNUM IN (SELECT EMPNUM FROM t3 WHERE PNUM IN (SELECT PNUM FROM t2 WHERE PTYPE = 'Design')); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 12 Start temporary 1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (Block Nested Loop) PREPARE stmt FROM "EXPLAIN SELECT EMPNAME FROM t1 WHERE EMPNUM IN (SELECT EMPNUM FROM t3 WHERE PNUM IN (SELECT PNUM FROM t2 WHERE PTYPE = 'Design'))"; EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 12 Start temporary 1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (Block Nested Loop) EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 12 Start temporary 1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (Block Nested Loop) DEALLOCATE PREPARE stmt; DROP INDEX t1_IDX ON t1; EXPLAIN SELECT EMPNAME FROM t1 WHERE EMPNUM IN (SELECT EMPNUM FROM t3 WHERE PNUM IN (SELECT PNUM FROM t2 WHERE PTYPE = 'Design')); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 5 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 12 Using where; FirstMatch(t1) PREPARE stmt FROM "EXPLAIN SELECT EMPNAME FROM t1 WHERE EMPNUM IN (SELECT EMPNUM FROM t3 WHERE PNUM IN (SELECT PNUM FROM t2 WHERE PTYPE = 'Design'))"; EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 5 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 12 Using where; FirstMatch(t1) EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 5 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 12 Using where; FirstMatch(t1) DEALLOCATE PREPARE stmt; DROP TABLE t1, t2, t3; # # BUG#45221 Query SELECT pk FROM C WHERE pk IN (SELECT int_key) failing # CREATE TABLE t1 ( i1_key INT, i2 INT, i3 INT, KEY i1_index (i1_key) ); INSERT INTO t1 VALUES (9,1,2), (9,2,1); CREATE TABLE t2 ( pk INT NOT NULL, i1 INT, PRIMARY KEY (pk) ); INSERT INTO t2 VALUES (9,1); SELECT pk FROM t2 WHERE pk IN ( SELECT i1_key FROM t1 WHERE t1.i2 < t1.i3 XOR t2.i1 > 1 ORDER BY t1.i2 desc); pk 9 DROP TABLE t1,t2; # BUG#50361 Doublenested noncorrelated subquery with FirstMatch and join cache wrong result # CREATE TABLE t1( id INTEGER ); INSERT INTO t1 VALUES(10),(20); create table t2 select * from t1; create table t3 select * from t1; SELECT * FROM t1 WHERE 1 IN(SELECT 1 FROM t2 WHERE 1 IN(SELECT 1 FROM t3)); id 10 20 explain extended SELECT * FROM t1 WHERE 1 IN(SELECT 1 FROM t2 WHERE 1 IN(SELECT 1 FROM t3)); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 End temporary; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id` from `test`.`t1` semi join (`test`.`t3` join `test`.`t2`) where 1 delete from t2; delete from t3; INSERT INTO t1 VALUES(30),(40),(50),(60),(70),(80),(90); insert into t2 select * from t1; insert into t3 select * from t1; create table t4 select * from t1; SELECT * FROM t1 WHERE 1 IN(SELECT 1 FROM t2 WHERE 1 IN(SELECT 1 FROM t3 WHERE 1 IN(SELECT 1 FROM t4))); id 10 20 30 40 50 60 70 80 90 explain SELECT * FROM t1 WHERE 1 IN(SELECT 1 FROM t2 WHERE 1 IN(SELECT 1 FROM t3 WHERE 1 IN(SELECT 1 FROM t4))); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 9 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 9 Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 9 Using join buffer (Block Nested Loop) 1 SIMPLE t4 ALL NULL NULL NULL NULL 9 End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE 1 IN(SELECT 1 FROM t1 WHERE 1 IN(SELECT 1 FROM t1 WHERE 1 IN(SELECT 1 FROM t1))); id 10 20 30 40 50 60 70 80 90 drop table t1,t2,t3,t4; # # Bug#53236 Segfault in DTCollation::set(DTCollation&) # CREATE TABLE t1 ( pk INTEGER AUTO_INCREMENT, col_varchar VARCHAR(1), PRIMARY KEY (pk) ) ; INSERT INTO t1 (col_varchar) VALUES ('w'), ('m') ; SELECT table1.pk FROM ( t1 AS table1 JOIN t1 AS table2 ON (table1.col_varchar = table2.col_varchar) ) WHERE ( 1, 2 ) IN ( SELECT SUBQUERY1_t1.pk AS SUBQUERY1_field1, SUBQUERY1_t1.pk AS SUBQUERY1_field2 FROM ( t1 AS SUBQUERY1_t1 JOIN t1 AS SUBQUERY1_t2 ON (SUBQUERY1_t2.col_varchar = SUBQUERY1_t1.col_varchar) ) ) ; pk drop table t1; # # BUG#53298 "wrong result with semijoin (no semijoin strategy chosen)" # create table t1 (uid int, fid int); insert into t1 values (1,1), (3,1); create table t2 (uid int, name varchar(128)); insert into t2 values (1, "A"), (2, "B"); create table t3 (uid int, fid int, index(uid)); insert into t3 values (1,3), (1,3); create table t4 (uid int); insert into t4 values (3); explain select t2.uid from t2, t1 where t1.uid in (select t4.uid from t4, t3 where t3.uid=1 and t4.uid=t3.fid) and t2.uid=t1.fid; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t3 ref uid uid 5 const 1 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) select t2.uid from t2, t1 where t1.uid in (select t4.uid from t4, t3 where t3.uid=1 and t4.uid=t3.fid) and t2.uid=t1.fid; uid 1 drop table t1,t2,t3,t4; CREATE TABLE t1 ( pk int, a varchar(1), b varchar(4), c varchar(4), d varchar(4), PRIMARY KEY (pk) ); INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff'); CREATE TABLE t2 LIKE t1; INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff'); EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0); pk 2 SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0); pk 2 DROP TABLE t1, t2; CREATE TABLE t1 (f1 INT, f2 DECIMAL(5,3)) ENGINE=MyISAM; INSERT INTO t1 (f1, f2) VALUES (1, 1.789); INSERT INTO t1 (f1, f2) VALUES (13, 1.454); INSERT INTO t1 (f1, f2) VALUES (10, 1.668); CREATE TABLE t2 LIKE t1; INSERT INTO t2 VALUES (1, 1.789); INSERT INTO t2 VALUES (13, 1.454); EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2); COUNT(*) 2 DROP TABLE t1, t2; CREATE TABLE t1 ( ID int(11) NOT NULL auto_increment, Name char(35) NOT NULL default '', Country char(3) NOT NULL default '', Population int(11) NOT NULL default '0', PRIMARY KEY (ID), INDEX (Population), INDEX (Country) ); CREATE TABLE t2 ( Code char(3) NOT NULL default '', Name char(52) NOT NULL default '', SurfaceArea float(10,2) NOT NULL default '0.00', Population int(11) NOT NULL default '0', Capital int(11) default NULL, PRIMARY KEY (Code), UNIQUE INDEX (Name), INDEX (Population) ); CREATE TABLE t3 ( Country char(3) NOT NULL default '', Language char(30) NOT NULL default '', Percentage float(3,1) NOT NULL default '0.0', PRIMARY KEY (Country, Language), INDEX (Percentage) ); EXPLAIN SELECT Name FROM t2 WHERE t2.Code IN (SELECT Country FROM t1 WHERE Population > 5000000) AND t2.Code IN (SELECT Country FROM t3 WHERE Language='English' AND Percentage > 10 AND t2.Population > 100000); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 range Population,Country Population 4 NULL 1 Using where; Start temporary 1 SIMPLE t2 eq_ref PRIMARY,Population PRIMARY 3 test.t1.Country 1 Using where; End temporary 1 SIMPLE t3 eq_ref PRIMARY,Percentage PRIMARY 33 test.t1.Country,const 1 Using where EXPLAIN FORMAT=JSON SELECT Name FROM t2 WHERE t2.Code IN (SELECT Country FROM t1 WHERE Population > 5000000) AND t2.Code IN (SELECT Country FROM t3 WHERE Language='English' AND Percentage > 10 AND t2.Population > 100000); EXPLAIN { "query_block": { "select_id": 1, "nested_loop": [ { "duplicates_removal": { "using_temporary_table": true, "nested_loop": [ { "table": { "table_name": "t1", "access_type": "range", "possible_keys": [ "Population", "Country" ], "key": "Population", "used_key_parts": [ "Population" ], "key_length": "4", "rows": 1, "filtered": 100, "attached_condition": "(`test`.`t1`.`Population` > 5000000)" } }, { "table": { "table_name": "t2", "access_type": "eq_ref", "possible_keys": [ "PRIMARY", "Population" ], "key": "PRIMARY", "used_key_parts": [ "Code" ], "key_length": "3", "ref": [ "test.t1.Country" ], "rows": 1, "filtered": 100, "attached_condition": "(`test`.`t2`.`Population` > 100000)" } } ] } }, { "table": { "table_name": "t3", "access_type": "eq_ref", "possible_keys": [ "PRIMARY", "Percentage" ], "key": "PRIMARY", "used_key_parts": [ "Country", "Language" ], "key_length": "33", "ref": [ "test.t1.Country", "const" ], "rows": 1, "filtered": 100, "attached_condition": "((`test`.`t3`.`Language` = 'English') and (`test`.`t3`.`Percentage` > 10))" } } ] } } Warnings: Note 1276 Field or reference 'test.t2.Population' of SELECT #3 was resolved in SELECT #1 Note 1003 /* select#1 */ select `test`.`t2`.`Name` AS `Name` from `test`.`t3` semi join (`test`.`t1`) join `test`.`t2` where ((`test`.`t2`.`Code` = `test`.`t1`.`Country`) and (`test`.`t3`.`Country` = `test`.`t1`.`Country`) and (`test`.`t3`.`Language` = 'English') and (`test`.`t3`.`Percentage` > 10) and (`test`.`t2`.`Population` > 100000) and (`test`.`t1`.`Population` > 5000000)) DROP TABLE t1,t2,t3; CREATE TABLE t1 ( Code char(3) NOT NULL DEFAULT '', Name char(52) NOT NULL DEFAULT '', Continent enum('Asia','Europe','North America','Africa','Oceania','Antarctica','South America') NOT NULL DEFAULT 'Asia', Region char(26) NOT NULL DEFAULT '', SurfaceArea float(10,2) NOT NULL DEFAULT '0.00', IndepYear smallint(6) DEFAULT NULL, Population int(11) NOT NULL DEFAULT '0', LifeExpectancy float(3,1) DEFAULT NULL, GNP float(10,2) DEFAULT NULL, GNPOld float(10,2) DEFAULT NULL, LocalName char(45) NOT NULL DEFAULT '', GovernmentForm char(45) NOT NULL DEFAULT '', HeadOfState char(60) DEFAULT NULL, Capital int(11) DEFAULT NULL, Code2 char(2) NOT NULL DEFAULT '', PRIMARY KEY (Code) ); CREATE TABLE t2 ( ID int(11) NOT NULL AUTO_INCREMENT, Name char(35) NOT NULL DEFAULT '', CountryCode char(3) NOT NULL DEFAULT '', District char(20) NOT NULL DEFAULT '', Population int(11) NOT NULL DEFAULT '0', PRIMARY KEY (ID), KEY CountryCode (CountryCode) ); Fill the table with test data This must not use LooseScan: EXPLAIN SELECT Name FROM t1 WHERE t1.Code IN ( SELECT t2.CountryCode FROM t2 WHERE Population > 5000000); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 31 NULL 1 SIMPLE t2 ref CountryCode CountryCode 3 test.t1.Code 18 Using where; FirstMatch(t1) SELECT Name FROM t1 WHERE t1.Code IN ( SELECT t2.CountryCode FROM t2 WHERE Population > 5000000); Name Austria Canada China Czech Republic drop table t1, t2; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4); create table t1 (a int, b int, key(a)); insert into t1 select a,a from t0; create table t2 (a int, b int, primary key(a)); insert into t2 select * from t1; Table t2, unlike table t1, should be displayed as pulled out explain extended select * from t0 where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and t1.b=t2.b); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 5 100.00 Using where; Start temporary 1 SIMPLE t1 ref a a 5 test.t0.a 1 100.00 NULL 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 100.00 Using where; End temporary Warnings: Note 1276 Field or reference 'test.t0.a' of SELECT #2 was resolved in SELECT #1 Note 1003 /* select#1 */ select `test`.`t0`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) join `test`.`t0` where ((`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t1`.`a` = `test`.`t0`.`a`) and (`test`.`t2`.`a` = `test`.`t0`.`a`)) update t1 set a=3, b=11 where a=4; update t2 set b=11 where a=3; create temporary table tmp select * from t0 where t0.a in (select t1.a from t1, t2 where t2.a=t0.a and t1.b=t2.b); create temporary table tmp_as_ref (a int); insert into tmp_as_ref values(0),(1),(2),(3); select * from tmp; a 0 1 2 3 drop table t0, t1, t2, tmp, tmp_as_ref; CREATE TABLE t1 ( id int(11) NOT NULL, PRIMARY KEY (id)); CREATE TABLE t2 ( id int(11) NOT NULL, fid int(11) NOT NULL, PRIMARY KEY (id)); insert into t1 values(1); insert into t2 values(1,7503),(2,1); explain select count(*) from t1 where fid IN (select fid from t2 where (id between 7502 and 8420) order by fid ); ERROR 42S22: Unknown column 'fid' in 'IN/ALL/ANY subquery' drop table t1, t2; create table t1 (a int, b int, key (a), key (b)); insert into t1 values (2,4),(2,4),(2,4); select t1.a from t1 where t1.a in (select 1 from t1 where t1.a in (select 1 from t1) group by t1.a); a drop table t1; create table t1(a int,b int,key(a),key(b)); insert into t1 values (1,1),(2,2),(3,3); select 1 from t1 where t1.a not in (select 1 from t1 where t1.a in (select 1 from t1) group by t1.b); 1 1 1 drop table t1; CREATE TABLE t1 (EMPNUM CHAR(3) NOT NULL, EMPNAME CHAR(20), GRADE DECIMAL(4), CITY CHAR(15)); CREATE TABLE t2 (PNUM CHAR(3) NOT NULL, PNAME CHAR(20), PTYPE CHAR(6), BUDGET DECIMAL(9), CITY CHAR(15)); CREATE TABLE t3 (EMPNUM CHAR(3) NOT NULL, PNUM CHAR(3) NOT NULL, HOURS DECIMAL(5)); INSERT INTO t1 VALUES ('E1','Alice',12,'Deale'); INSERT INTO t1 VALUES ('E2','Betty',10,'Vienna'); INSERT INTO t1 VALUES ('E3','Carmen',13,'Vienna'); INSERT INTO t1 VALUES ('E4','Don',12,'Deale'); INSERT INTO t1 VALUES ('E5','Ed',13,'Akron'); INSERT INTO t2 VALUES ('P1','MXSS','Design',10000,'Deale'); INSERT INTO t2 VALUES ('P2','CALM','Code',30000,'Vienna'); INSERT INTO t2 VALUES ('P3','SDP','Test',30000,'Tampa'); INSERT INTO t2 VALUES ('P4','SDP','Design',20000,'Deale'); INSERT INTO t2 VALUES ('P5','IRM','Test',10000,'Vienna'); INSERT INTO t2 VALUES ('P6','PAYR','Design',50000,'Deale'); INSERT INTO t3 VALUES ('E1','P1',40); INSERT INTO t3 VALUES ('E1','P2',20); INSERT INTO t3 VALUES ('E1','P3',80); INSERT INTO t3 VALUES ('E1','P4',20); INSERT INTO t3 VALUES ('E1','P5',12); INSERT INTO t3 VALUES ('E1','P6',12); INSERT INTO t3 VALUES ('E2','P1',40); INSERT INTO t3 VALUES ('E2','P2',80); INSERT INTO t3 VALUES ('E3','P2',20); INSERT INTO t3 VALUES ('E4','P2',20); INSERT INTO t3 VALUES ('E4','P4',40); INSERT INTO t3 VALUES ('E4','P5',80); SELECT * FROM t1; EMPNUM EMPNAME GRADE CITY E1 Alice 12 Deale E2 Betty 10 Vienna E3 Carmen 13 Vienna E4 Don 12 Deale E5 Ed 13 Akron CREATE UNIQUE INDEX t1_IDX ON t1(EMPNUM); SELECT EMPNAME FROM t1 WHERE EMPNUM IN (SELECT EMPNUM FROM t3 WHERE PNUM IN (SELECT PNUM FROM t2 WHERE PTYPE = 'Design')); EMPNAME Alice Betty Don DROP INDEX t1_IDX ON t1; CREATE INDEX t1_IDX ON t1(EMPNUM); SELECT EMPNAME FROM t1 WHERE EMPNUM IN (SELECT EMPNUM FROM t3 WHERE PNUM IN (SELECT PNUM FROM t2 WHERE PTYPE = 'Design')); EMPNAME Alice Betty Don DROP INDEX t1_IDX ON t1; SELECT EMPNAME FROM t1 WHERE EMPNUM IN (SELECT EMPNUM FROM t3 WHERE PNUM IN (SELECT PNUM FROM t2 WHERE PTYPE = 'Design')); EMPNAME Alice Betty Don DROP TABLE t1, t2, t3; CREATE TABLE t1 (f1 INT NOT NULL); CREATE VIEW v1 (a) AS SELECT f1 IN (SELECT f1 FROM t1) FROM t1; SELECT * FROM v1; a drop view v1; drop table t1; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t1(a int, b int); insert into t1 values (0,0),(1,1),(2,2); create table t2 as select * from t1; create table t3 (pk int, a int, primary key(pk)); insert into t3 select a,a from t0; explain select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3)); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 NULL 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using index drop table t0, t1, t2, t3; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t1 (a int) as select A.a + 10 *(B.a + 10*C.a) as a from t0 A, t0 B, t0 C; create table t2 (id int, a int, primary key(id), key(a)) as select a as id, a as a from t1; show create table t2; Table Create Table t2 CREATE TABLE `t2` ( `id` int(11) NOT NULL DEFAULT '0', `a` int(11) DEFAULT NULL, PRIMARY KEY (`id`), KEY `a` (`a`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 set @a=0; create table t3 as select * from t2 limit 0; insert into t3 select @a:=@a+1, t2.a from t2, t0; insert into t3 select @a:=@a+1, t2.a from t2, t0; insert into t3 select @a:=@a+1, t2.a from t2, t0; alter table t3 add primary key(id), add key(a); The following must use loose index scan over t3, key a: explain select count(a) from t2 where a in ( SELECT a FROM t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 index a a 5 NULL 1000 Using where; Using index 1 SIMPLE t3 ref a a 5 test.t2.a 30 Using index; FirstMatch(t2) select count(a) from t2 where a in ( SELECT a FROM t3); count(a) 1000 drop table t0,t1,t2,t3; # # Bug#33062: subquery in stored routine cause crash # CREATE TABLE t1(a INT); CREATE TABLE t2(c INT); CREATE PROCEDURE p1(v1 int) BEGIN SELECT 1 FROM t1 WHERE a = v1 AND a IN (SELECT c FROM t2); END // CREATE PROCEDURE p2(v1 int) BEGIN SELECT 1 FROM t1 WHERE a IN (SELECT c FROM t2); END // CREATE PROCEDURE p3(v1 int) BEGIN SELECT 1 FROM t1 t01,t1 t02,t1 t03,t1 t04,t1 t05,t1 t06,t1 t07,t1 t08, t1 t09,t1 t10,t1 t11,t1 t12,t1 t13,t1 t14,t1 t15,t1 t16, t1 t17,t1 t18,t1 t19,t1 t20,t1 t21,t1 t22,t1 t23,t1 t24, t1 t25,t1 t26,t1 t27,t1 t28,t1 t29,t1 t30,t1 t31,t1 t32, t1 t33,t1 t34,t1 t35,t1 t36,t1 t37,t1 t38,t1 t39,t1 t40, t1 t41,t1 t42,t1 t43,t1 t44,t1 t45,t1 t46,t1 t47,t1 t48, t1 t49,t1 t50,t1 t51,t1 t52,t1 t53,t1 t54,t1 t55,t1 t56, t1 t57,t1 t58,t1 t59,t1 t60 WHERE t01.a IN (SELECT c FROM t2); END // CREATE PROCEDURE p4(v1 int) BEGIN SELECT 1 FROM t1 t01,t1 t02,t1 t03,t1 t04,t1 t05,t1 t06,t1 t07,t1 t08, t1 t09,t1 t10,t1 t11,t1 t12,t1 t13,t1 t14,t1 t15,t1 t16, t1 t17,t1 t18,t1 t19,t1 t20,t1 t21,t1 t22,t1 t23,t1 t24, t1 t25,t1 t26,t1 t27,t1 t28,t1 t29,t1 t30,t1 t31,t1 t32, t1 t33,t1 t34,t1 t35,t1 t36,t1 t37,t1 t38,t1 t39,t1 t40, t1 t41,t1 t42,t1 t43,t1 t44,t1 t45,t1 t46,t1 t47,t1 t48, t1 t49,t1 t50,t1 t51,t1 t52,t1 t53,t1 t54,t1 t55,t1 t56, t1 t57,t1 t58,t1 t59,t1 t60 WHERE t01.a = v1 AND t01.a IN (SELECT c FROM t2); END // CALL p1(1); 1 CALL p2(1); 1 CALL p3(1); 1 CALL p4(1); 1 DROP TABLE t1, t2; DROP PROCEDURE p1; DROP PROCEDURE p2; DROP PROCEDURE p3; DROP PROCEDURE p4; # # Bug#48213 Materialized subselect crashes if using GEOMETRY type # CREATE TABLE t1 ( pk int, a varchar(1), b varchar(4), c tinyblob, d blob, e mediumblob, f longblob, g tinytext, h text, i mediumtext, j longtext, k geometry, PRIMARY KEY (pk) ); INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo','ffff','ffff','ffff','ffff','ffff','ffff',GeomFromText('POLYGON((0 0, 0 2, 2 2, 2 0, 0 0))')), (2,'f','ffff','ffff','ffff', 'ffff','ffff','ffff','ffff','ffff','ffff',GeomFromText('POLYGON((0 0, 0 2, 2 2, 2 0, 0 0))')); CREATE TABLE t2 LIKE t1; INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii','iiii','ffff','ffff','ffff','ffff','ffff',GeomFromText('POLYGON((0 0, 0 2, 2 2, 2 0, 0 0))')), (2,'f','ffff','ffff','ffff','ffff','ffff','ffff','ffff','ffff','ffff',GeomFromText('POLYGON((0 0, 0 2, 2 2, 2 0, 0 0))')); EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 NULL 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b FROM t2 WHERE pk > 0); pk 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, c) IN (SELECT b, c FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 NULL 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`c` = `test`.`t1`.`c`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, c) IN (SELECT b, c FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, d) IN (SELECT b, d FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 NULL 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`d` = `test`.`t1`.`d`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, d) IN (SELECT b, d FROM t2 WHERE pk > 0); pk 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, e) IN (SELECT b, e FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 NULL 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`e` = `test`.`t1`.`e`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, e) IN (SELECT b, e FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, f) IN (SELECT b, f FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 NULL 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`f` = `test`.`t1`.`f`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, f) IN (SELECT b, f FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, g) IN (SELECT b, g FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 NULL 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`g` = `test`.`t1`.`g`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, g) IN (SELECT b, g FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, h) IN (SELECT b, h FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 NULL 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`h` = `test`.`t1`.`h`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, h) IN (SELECT b, h FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, i) IN (SELECT b, i FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 NULL 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`i` = `test`.`t1`.`i`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, i) IN (SELECT b, i FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, j) IN (SELECT b, j FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 NULL 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`j` = `test`.`t1`.`j`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, j) IN (SELECT b, j FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, k) IN (SELECT b, k FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 NULL 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`k` = `test`.`t1`.`k`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, k) IN (SELECT b, k FROM t2 WHERE pk > 0); pk 1 2 DROP TABLE t1, t2; # End of Bug#48213 # # BUG#53060: LooseScan semijoin strategy does not return all rows # CREATE TABLE t1 (i INTEGER); INSERT INTO t1 VALUES (1), (2), (3), (4), (5); CREATE TABLE t2 (i INTEGER, j INTEGER, KEY k(i, j)); INSERT INTO t2 VALUES (1, 0), (1, 1), (2, 0), (2, 1); EXPLAIN SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 5 NULL 1 SIMPLE t2 index k k 10 NULL 4 Using where; Using index; FirstMatch(t1); Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0); i 1 2 DROP TABLE t1, t2; # End of BUG#53060 # # Bug#53305 "Duplicate weedout + join buffer (join cache --level=7,8) loses rows" # create table t1 (uid int, fid int, index(uid)); insert into t1 values (1,1), (1,2), (1,3), (1,4), (2,5), (2,6), (2,7), (2,8), (3,1), (3,2), (3,9); create table t2 (uid int primary key, name varchar(128), index(name)); insert into t2 values (1, "A"), (2, "B"), (3, "C"), (4, "D"), (5, "E"), (6, "F"), (7, "G"), (8, "H"), (9, "I"); create table t3 (uid int, fid int, index(uid)); insert into t3 values (1,1), (1,2), (1,3),(1,4), (2,5), (2,6), (2,7), (2,8), (3,1), (3,2), (3,9); create table t4 (uid int primary key, name varchar(128), index(name)); insert into t4 values (1, "A"), (2, "B"), (3, "C"), (4, "D"), (5, "E"), (6, "F"), (7, "G"), (8, "H"), (9, "I"); explain select name from t2, t1 where t1.uid in (select t4.uid from t4, t3 where t3.uid=1 and t4.uid=t3.fid) and t2.uid=t1.fid; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ref uid uid 5 const 4 Using where; Start temporary 1 SIMPLE t4 eq_ref PRIMARY PRIMARY 4 test.t3.fid 1 Using index 1 SIMPLE t1 ref uid uid 5 test.t3.fid 2 Using where 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.fid 1 End temporary select name from t2, t1 where t1.uid in (select t4.uid from t4, t3 where t3.uid=1 and t4.uid=t3.fid) and t2.uid=t1.fid; name A A B B C D E F G H I drop table t1,t2,t3,t4; # # Bug#43768 Prepared query with nested subqueries core dump on second execution # CREATE TABLE t1 ( id INT PRIMARY KEY, partner_id VARCHAR(35) ); INSERT INTO t1 VALUES (1, 'partner1'), (2, 'partner2'), (3, 'partner3'), (4, 'partner4'); CREATE TABLE t2 ( id INT NOT NULL, t1_line_id INT, article_id VARCHAR(20), PRIMARY KEY(id, t1_line_id) ); INSERT INTO t2 VALUES (1, 1, 'sup'), (2, 1, 'sup'), (2, 2, 'sup'), (2, 3, 'sup'), (2, 4, 'imp'), (3, 1, 'sup'), (4, 1, 'sup'); CREATE TABLE t3 ( user_id VARCHAR(50), article_id VARCHAR(20) NOT NULL, PRIMARY KEY(user_id) ); INSERT INTO t3 VALUES('nicke', 'imp'); EXPLAIN SELECT t1.partner_id FROM t1 WHERE t1.id IN ( SELECT t2.id FROM t2 WHERE article_id IN ( SELECT article_id FROM t3 WHERE user_id = 'nicke' ) ); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 system PRIMARY NULL NULL NULL 1 NULL 1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 4 NULL 1 SIMPLE t2 ref PRIMARY PRIMARY 4 test.t1.id 1 Using where; FirstMatch(t1) SELECT t1.partner_id FROM t1 WHERE t1.id IN ( SELECT t2.id FROM t2 WHERE article_id IN ( SELECT article_id FROM t3 WHERE user_id = 'nicke' ) ); partner_id partner2 PREPARE stmt FROM 'EXPLAIN SELECT t1.partner_id FROM t1 WHERE t1.id IN ( SELECT t2.id FROM t2 WHERE article_id IN ( SELECT article_id FROM t3 WHERE user_id = \'nicke\' ) )'; EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 system PRIMARY NULL NULL NULL 1 NULL 1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 4 NULL 1 SIMPLE t2 ref PRIMARY PRIMARY 4 test.t1.id 1 Using where; FirstMatch(t1) EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 system PRIMARY NULL NULL NULL 1 NULL 1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 4 NULL 1 SIMPLE t2 ref PRIMARY PRIMARY 4 test.t1.id 1 Using where; FirstMatch(t1) PREPARE stmt FROM 'SELECT t1.partner_id FROM t1 WHERE t1.id IN ( SELECT t2.id FROM t2 WHERE article_id IN ( SELECT article_id FROM t3 WHERE user_id = \'nicke\' ) )'; EXECUTE stmt; partner_id partner2 EXECUTE stmt; partner_id partner2 DROP TABLE t1,t2,t3; # End of Bug#43768 # # Bug#53058 - semijoin execution of subquery with outerjoin yields wrong result # CREATE TABLE t1 (i INTEGER); CREATE TABLE t2 (i INTEGER); CREATE TABLE t3 (i INTEGER); INSERT INTO t1 VALUES (1), (2); INSERT INTO t2 VALUES (6); INSERT INTO t3 VALUES (1), (2); explain extended SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t3 LEFT JOIN t2 ON t2.i=t3.i); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Start temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 1 100.00 Using where; End temporary; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`i` AS `i` from `test`.`t1` semi join (`test`.`t3` left join `test`.`t2` on((`test`.`t2`.`i` = `test`.`t3`.`i`))) where (`test`.`t3`.`i` = `test`.`t1`.`i`) SELECT * FROM t1 WHERE (t1.i) IN (SELECT t3.i FROM t3 LEFT JOIN t2 ON t2.i=t3.i); i 1 2 drop table t1,t2,t3; # # BUG#49453: re-execution of prepared statement with view # and semijoin crashes # CREATE TABLE t1 (city VARCHAR(50), country_id INT); CREATE TABLE t2 (country_id INT, country VARCHAR(50)); INSERT INTO t1 VALUES ('Batna',2),('Bchar',2),('Skikda',2),('Tafuna',3),('Algeria',2) ; INSERT INTO t2 VALUES (2,'Algeria'),(2,'AlgeriaDup'),(3,'XAmerican Samoa'); CREATE VIEW v1 AS SELECT country_id as vf_country_id FROM t2 WHERE LEFT(country,1) = "A"; PREPARE stmt FROM " SELECT city, country_id FROM t1 WHERE country_id IN (SELECT vf_country_id FROM v1); "; EXECUTE stmt; city country_id Batna 2 Bchar 2 Skikda 2 Algeria 2 EXECUTE stmt; city country_id Batna 2 Bchar 2 Skikda 2 Algeria 2 DROP TABLE t1,t2; DROP VIEW v1; # # Bug#54437 Extra rows with LEFT JOIN + semijoin (firstmatch # and duplicates weedout) # create table t1 (a int); create table t2 (a int); create table t3 (a int); insert into t1 values(1),(1); insert into t2 values(1),(1),(1),(1); insert into t3 values(2),(2); explain select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a); a 1 1 drop table t1,t2,t3; # # Bug#55955: crash in MEMORY engine with IN(LEFT JOIN (JOIN)) # CREATE TABLE t1 (a INT); CREATE TABLE t2 (a INT); CREATE TABLE t3 (a INT); INSERT INTO t1 VALUES(1),(1); INSERT INTO t2 VALUES(1),(1); INSERT INTO t3 VALUES(2),(2); explain SELECT * FROM t1 WHERE t1.a IN (SELECT t2.a FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2inner ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 WHERE t1.a IN (SELECT t2.a FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a); a 1 1 DROP TABLE t1,t2,t3; # # BUG#52329 - Wrong result: subquery materialization, IN, # non-null field followed by nullable # CREATE TABLE t1 (a1 CHAR(8) NOT NULL, a2 char(8) NOT NULL); CREATE TABLE t2a (b1 char(8), b2 char(8)); CREATE TABLE t2b (b1 CHAR(8), b2 char(8) NOT NULL); CREATE TABLE t2c (b1 CHAR(8) NOT NULL, b2 char(8)); INSERT INTO t1 VALUES ('1 - 12', '2 - 22'); INSERT INTO t2a VALUES ('1 - 11', '2 - 21'), ('1 - 11', '2 - 21'), ('1 - 12', '2 - 22'), ('1 - 12', '2 - 22'), ('1 - 13', '2 - 23'); INSERT INTO t2b SELECT * FROM t2a; INSERT INTO t2c SELECT * FROM t2a; SELECT * FROM t1 WHERE (a1, a2) IN ( SELECT b1, b2 FROM t2c WHERE b1 > '0' GROUP BY b1, b2); a1 a2 1 - 12 2 - 22 SELECT * FROM t1 WHERE (a1, a2) IN ( SELECT b1, b2 FROM t2a WHERE b1 > '0'); a1 a2 1 - 12 2 - 22 SELECT * FROM t1 WHERE (a1, a2) IN ( SELECT b1, b2 FROM t2b WHERE b1 > '0'); a1 a2 1 - 12 2 - 22 SELECT * FROM t1 WHERE (a1, a2) IN ( SELECT b1, b2 FROM t2c WHERE b1 > '0'); a1 a2 1 - 12 2 - 22 DROP TABLE t1,t2a,t2b,t2c; # End BUG#52329 # # Bug#45174: Incorrectly applied equality propagation caused wrong # result on a query with a materialized semi-join. # CREATE TABLE t1 ( varchar_nokey varchar(1) NOT NULL ); INSERT INTO t1 VALUES ('v'), ('u'), ('n'), ('l'), ('h'), ('u'), ('n'), ('j'), ('k'), ('e'), ('i'), ('u'), ('n'), ('b'), ('x'), (''), ('q'), ('u'); CREATE TABLE t2 ( pk int NOT NULL, varchar_key varchar(1) NOT NULL, varchar_nokey varchar(1) NOT NULL, PRIMARY KEY(pk), KEY varchar_key(varchar_key) ); INSERT INTO t2 VALUES (11,'m','m'), (12,'j','j'), (13,'z','z'), (14,'a','a'), (15,'',''), (16,'e','e'), (17,'t','t'), (19,'b','b'), (20,'w','w'), (21,'m','m'), (23,'',''), (24,'w','w'), (26,'e','e'), (27,'e','e'), (28,'p','p'); SELECT varchar_nokey FROM t1 WHERE (varchar_nokey, varchar_nokey) IN (SELECT varchar_key, varchar_nokey FROM t2 WHERE varchar_nokey < 'n' XOR pk); varchar_nokey explain SELECT varchar_nokey FROM t1 WHERE (varchar_nokey, varchar_nokey) IN (SELECT varchar_key, varchar_nokey FROM t2 WHERE varchar_nokey < 'n' XOR pk); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 18 NULL 1 SIMPLE t2 ref varchar_key varchar_key 3 test.t1.varchar_nokey 2 Using where; FirstMatch(t1) DROP TABLE t1, t2; # End of the test for bug#45174. # # Bug#50019: Wrong result for IN-query with materialization # CREATE TABLE t1(i INT); INSERT INTO t1 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10); CREATE TABLE t2(i INT); INSERT INTO t2 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10); CREATE TABLE t3(i INT); INSERT INTO t3 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10); SELECT * FROM t1 WHERE t1.i IN (SELECT t2.i FROM t2 JOIN t3 WHERE t2.i + t3.i = 5); i 4 3 2 1 explain SELECT * FROM t1 WHERE t1.i IN (SELECT t2.i FROM t2 JOIN t3 WHERE t2.i + t3.i = 5); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 ALL NULL NULL NULL NULL 10 Using where; End temporary; Using join buffer (Block Nested Loop) DROP TABLE t1,t2,t3; # End of the test for bug#50019. # # Bug#52068: Optimizer generates invalid semijoin materialization plan # CREATE TABLE ot1(a INTEGER); INSERT INTO ot1 VALUES(5), (8); CREATE TABLE it2(a INTEGER); INSERT INTO it2 VALUES(9), (5), (1), (8); CREATE TABLE it3(a INTEGER); INSERT INTO it3 VALUES(7), (1), (0), (5), (1), (4); CREATE TABLE ot4(a INTEGER); INSERT INTO ot4 VALUES(1), (3), (5), (7), (9), (7), (3), (1); SELECT * FROM ot1,ot4 WHERE (ot1.a,ot4.a) IN (SELECT it2.a,it3.a FROM it2,it3); a a 5 1 8 1 5 5 8 5 5 7 8 7 5 7 8 7 5 1 8 1 explain SELECT * FROM ot1,ot4 WHERE (ot1.a,ot4.a) IN (SELECT it2.a,it3.a FROM it2,it3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE it2 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE it3 ALL NULL NULL NULL NULL 6 Using join buffer (Block Nested Loop) 1 SIMPLE ot4 ALL NULL NULL NULL NULL 8 Using where; End temporary; Using join buffer (Block Nested Loop) DROP TABLE IF EXISTS ot1, ot4, it2, it3; # End of the test for bug#52068. # # Bug#57623: subquery within before insert trigger causes crash (sj=on) # CREATE TABLE ot1(a INT); CREATE TABLE ot2(a INT); CREATE TABLE ot3(a INT); CREATE TABLE it1(a INT); INSERT INTO ot1 VALUES(0),(1),(2),(3),(4),(5),(6),(7); INSERT INTO ot2 VALUES(0),(2),(4),(6); INSERT INTO ot3 VALUES(0),(3),(6); INSERT INTO it1 VALUES(0),(1),(2),(3),(4),(5),(6),(7); explain SELECT * FROM ot1 LEFT JOIN (ot2 JOIN ot3 on ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot1 ALL NULL NULL NULL NULL 8 NULL 1 SIMPLE it1 ALL NULL NULL NULL NULL 8 Using where; FirstMatch(ot1) 1 SIMPLE ot3 ALL NULL NULL NULL NULL 3 NULL 1 SIMPLE ot2 ALL NULL NULL NULL NULL 4 Using where SELECT * FROM ot1 LEFT JOIN (ot2 JOIN ot3 on ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1); a a a 0 0 0 1 NULL NULL 2 NULL NULL 3 NULL NULL 4 NULL NULL 5 NULL NULL 6 6 6 7 NULL NULL prepare s from 'SELECT * FROM ot1 LEFT JOIN (ot2 JOIN ot3 on ot2.a=ot3.a) ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1)'; execute s; a a a 0 0 0 1 NULL NULL 2 NULL NULL 3 NULL NULL 4 NULL NULL 5 NULL NULL 6 6 6 7 NULL NULL execute s; a a a 0 0 0 1 NULL NULL 2 NULL NULL 3 NULL NULL 4 NULL NULL 5 NULL NULL 6 6 6 7 NULL NULL deallocate prepare s; DROP TABLE ot1, ot2, ot3, it1; # End of the test for bug#57623. # # Bug#11766739: Crash in tmp_table_param::init() with semijoin=on # CREATE TABLE t1 (f1 INTEGER) ENGINE=MyISAM; CREATE TABLE t2 (f1 INTEGER, f2 INTEGER) ENGINE=MyISAM; INSERT INTO t1 VALUES (1); INSERT INTO t2 VALUES (1,1), (2,1); EXPLAIN SELECT * FROM t2 WHERE f2 IN (SELECT t1.f1 FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 1 Start temporary 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE b1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE b2 ALL NULL NULL NULL NULL 2 End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t2 WHERE f2 IN (SELECT t1.f1 FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE); f1 f2 1 1 2 1 DROP TABLE t1, t2; # End of the test for bug#11766739. # # Bug#11766642: crash in Item_field::register_field_in_read_map with view # CREATE TABLE t1(a INT); CREATE VIEW v1 AS SELECT a FROM t1; INSERT INTO t1 VALUES (0),(1),(2); SELECT a FROM t1 WHERE a IN (SELECT a XOR a FROM v1) ORDER BY a; a 0 DROP TABLE t1; DROP VIEW v1; # # Bug#12546542 MISSING ROW WHEN USING OPTIMIZER_JOIN_CACHE_LEVEL>=3 # CREATE TABLE t1 ( f2 varchar(1024) ); INSERT INTO t1 VALUES ('v'),('we'); CREATE TABLE t2 ( col_varchar_1024_utf8 varchar(1024) CHARACTER SET utf8 DEFAULT NULL, col_int_key int, col_int int ); INSERT INTO t2 VALUES ('we',4,NULL),('v',1305673728,6); CREATE TABLE t3 ( col_int_key int, col_int int ); INSERT INTO t3 VALUES (4,4); SELECT * FROM t1 WHERE f2 IN (SELECT a1.col_varchar_1024_utf8 AS f2 FROM t2 AS a1 LEFT JOIN t3 AS a2 ON a1.col_int_key = a2.col_int_key WHERE a1.col_int BETWEEN 1 AND 10 OR a2.col_int IS NOT NULL); f2 we v DROP TABLE t1,t2,t3; # # BUG#12616344 - JCL: DIFFERENT RESULT SET AND DIFFERENT AMOUNT # OF ROWS WHEN JCL>=3 # CREATE TABLE t1 (col_int_nokey int, col_int_key int, col_varchar_key varchar(1)); INSERT INTO t1 VALUES (0,4,'c'),(1,6,'u'); CREATE TABLE t2 (pk int, col_int_nokey int, col_varchar_nokey varchar(1)); INSERT INTO t2 VALUES (1,4,'b'),(94,6,'u'); CREATE TABLE t3 (pk int, col_int_nokey int, col_varchar_key varchar(1)); INSERT INTO t3 VALUES (1,4,'j'),(2,6,'v'); SELECT table2.col_int_key from t3 as table1 join t1 as table2 on table2.col_int_nokey where table1.col_int_nokey in ( select subquery2_t2.col_int_nokey from t3 as subquery2_t1 right join t2 as subquery2_t2 join t1 as subquery2_t3 on subquery2_t3.col_int_key = subquery2_t2.col_int_nokey on subquery2_t3.col_varchar_key = subquery2_t2.col_varchar_nokey where subquery2_t1.col_varchar_key != table1.col_varchar_key or subquery2_t2.pk <= table1.pk ); col_int_key 6 6 DROP TABLE t1,t2,t3; # # Bug#12608157: ASSERT IN FIELD_LONG::VAL_INT WHEN USING MEMORY ENGINE # CREATE TABLE t1 (i1 int); INSERT INTO t1 VALUES (1); CREATE TABLE t2 (i1 int, i2 int) ENGINE=memory; INSERT INTO t2 VALUES (1, 2),(7, 3); SELECT GRANDPARENT1.i1 FROM t2 AS GRANDPARENT1 WHERE GRANDPARENT1.i2 IN ( SELECT PARENT1.i2 FROM t2 AS PARENT1 JOIN t1 AS PARENT2 ON (PARENT1.i1 = PARENT2.i1) WHERE GRANDPARENT1.i1 IN ( SELECT CHILD1.i1 FROM t2 AS CHILD1 ) ORDER BY PARENT1.i1) ORDER BY GRANDPARENT1.i2 ; i1 1 DROP TABLE t1,t2; # # Bug#12640083: Same query executed as WHERE subquery gives different # results on IN() compare # CREATE TABLE t1 ( pk int NOT NULL, col_varchar_1024_utf8_key varchar(1024) CHARACTER SET utf8 DEFAULT NULL, col_varchar_10_latin1_key varchar(10) DEFAULT NULL, PRIMARY KEY (pk), KEY col_varchar_1024_utf8_key(col_varchar_1024_utf8_key(333)), KEY col_varchar_10_latin1_key(col_varchar_10_latin1_key) ); INSERT INTO t1 VALUES (1, 'a', 'a'), (2, 'ab', 'ab'), (3, 'abc', 'abc'), (4, 'abcd', 'abcd'); CREATE TABLE t2 ( pk int NOT NULL AUTO_INCREMENT, PRIMARY KEY (pk) ) ENGINE=Innodb; CREATE TABLE t3 SELECT alias1.col_varchar_10_latin1_key FROM t1 AS alias1 LEFT JOIN t1 AS alias2 JOIN t2 AS alias3 ON alias2.col_varchar_10_latin1_key ON alias1.col_varchar_1024_utf8_key WHERE alias1.pk AND alias1.pk < 3 OR alias1.pk AND alias3.pk; EXPLAIN SELECT * FROM t3 WHERE col_varchar_10_latin1_key IN ( SELECT alias1.col_varchar_10_latin1_key FROM t1 AS alias1 LEFT JOIN t1 AS alias2 JOIN t2 AS alias3 ON alias2.col_varchar_10_latin1_key ON alias1.col_varchar_1024_utf8_key WHERE alias1.pk AND alias1.pk < 3 OR alias1.pk AND alias3.pk); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE alias1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE alias3 index NULL PRIMARY 4 NULL 1 Using where; Using index; Using join buffer (Block Nested Loop) 1 SIMPLE alias2 index NULL col_varchar_10_latin1_key 13 NULL 4 Using where; Using index; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t3 WHERE col_varchar_10_latin1_key IN ( SELECT alias1.col_varchar_10_latin1_key FROM t1 AS alias1 LEFT JOIN t1 AS alias2 JOIN t2 AS alias3 ON alias2.col_varchar_10_latin1_key ON alias1.col_varchar_1024_utf8_key WHERE alias1.pk AND alias1.pk < 3 OR alias1.pk AND alias3.pk); col_varchar_10_latin1_key a ab DROP TABLE t1, t2, t3; # End of the test for bug#12640083. # # Bug#12603200 - Assert in QUICK_INDEX_MERGE_SELECT::need_sorted_output # CREATE TABLE t1 ( pk int NOT NULL, col_int_key int NOT NULL, col_varchar_nokey varchar(1) NOT NULL, col_varchar_key varchar(1) NOT NULL, PRIMARY KEY(pk), KEY col_int_key(col_int_key), KEY col_varchar_key(col_varchar_key, col_int_key) ) engine=innodb; INSERT INTO t1 VALUES (1,7,'a','a'), (2,0,'v','v'), (3,9,'c','c'), (4,3,'m','m'), (5,2,'a','a'), (6,1,'d','d'), (7,8,'y','y'), (8,6,'t','t'), (11,7,'a','x'), (12,0,'v','v'), (13,9,'c','c'), (14,3,'m','m'), (15,2,'a','x'), (16,1,'d','d'), (17,8,'y','y'), (18,6,'t','u'); CREATE TABLE t2 ( pk int NOT NULL, col_int_key int NOT NULL, col_varchar_key varchar(1) NOT NULL, PRIMARY KEY(pk), KEY col_varchar_key(col_varchar_key, col_int_key) ) engine=innodb; INSERT INTO t2(pk,col_int_key,col_varchar_key) VALUES (8,7,'c'), (11,4,'l'), (12,7,'b'), (13,0,'c'), (14,2,'i'), (15,9,'h'), (16,4,'q'), (17,1,'m'), (18,9,'b'), (19,2,'e'), (20,1,'c'), (21,7,'z'), (22,4,'l'), (23,7,'z'), (24,0,'c'), (25,2,'i'), (26,9,'h'), (27,4,'q'), (28,0,'a'), (29,1,'d'); EXPLAIN SELECT outr.col_varchar_key AS x, outr.pk AS y FROM t1 AS outr WHERE outr.col_varchar_key IN (SELECT innr.col_varchar_key FROM t2 AS innr WHERE innr.col_varchar_key = 'a' OR innr.pk = 8) AND outr.col_varchar_nokey < 't' ORDER BY outr.col_varchar_key, outr.pk; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE innr index_merge PRIMARY,col_varchar_key col_varchar_key,PRIMARY 3,4 NULL 2 Using sort_union(col_varchar_key,PRIMARY); Using where; Using temporary; Using filesort; Start temporary 1 SIMPLE outr ref col_varchar_key col_varchar_key 3 test.innr.col_varchar_key 1 Using where; End temporary SELECT outr.col_varchar_key AS x, outr.pk AS y FROM t1 AS outr WHERE outr.col_varchar_key IN (SELECT innr.col_varchar_key FROM t2 AS innr WHERE innr.col_varchar_key = 'a' OR innr.pk = 8) AND outr.col_varchar_nokey < 't' ORDER BY outr.col_varchar_key, outr.pk; x y a 1 a 5 c 3 c 13 DROP TABLE t1, t2; # End of bug#12603200 # # Bug#12603183: Segfault in hp_movelink # CREATE TABLE t1 ( col_varchar_key varchar(1) , col_varchar_nokey varchar(1) , KEY col_varchar_key(col_varchar_key) ); INSERT INTO t1 VALUES ('i','i'), ('h','h'), ('q','q'), ('a','a'), ('v','v'), ('u','u'), ('s','s'), ('y','y'), ('z','z'), ('h','h'), ('p','p'), ('e','e'), ('i','i'), ('y','y'), ('w','w'); CREATE TABLE t2 ( col_varchar_nokey varchar(1) ); INSERT INTO t2 VALUES ('b'); EXPLAIN SELECT grandparent1.col_varchar_nokey FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey) WHERE (grandparent1.col_varchar_key) IN (SELECT parent1.col_varchar_nokey FROM t1 AS parent1 WHERE parent1.col_varchar_key IN (SELECT child1.col_varchar_nokey AS c1 FROM t1 AS child1 LEFT JOIN t2 AS child2 ON (child1.col_varchar_key > child2.col_varchar_nokey))); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE child1 ALL NULL NULL NULL NULL 15 Using where; Start temporary 1 SIMPLE child2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE parent1 ref col_varchar_key col_varchar_key 4 test.child1.col_varchar_nokey 2 Using where 1 SIMPLE grandparent1 ref col_varchar_key col_varchar_key 4 test.parent1.col_varchar_nokey 2 End temporary 1 SIMPLE grandparent2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) SELECT grandparent1.col_varchar_nokey FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey) WHERE (grandparent1.col_varchar_key) IN (SELECT parent1.col_varchar_nokey FROM t1 AS parent1 WHERE parent1.col_varchar_key IN (SELECT child1.col_varchar_nokey AS c1 FROM t1 AS child1 LEFT JOIN t2 AS child2 ON (child1.col_varchar_key > child2.col_varchar_nokey))); col_varchar_nokey a e h h i i p q s u v w y y z DROP TABLE t1, t2; # End of test for bug#12603183. # # Bug#12818569: Diff nr of rows returned when using IN/ALL+subquery # CREATE TABLE t1 ( col_int_key INT NOT NULL, col_datetime_key DATETIME NOT NULL, col_varchar_key VARCHAR(1) NOT NULL, KEY col_int_key (col_int_key), KEY col_datetime_key(col_datetime_key), KEY col_varchar_key (col_varchar_key,col_int_key) ) ENGINE=InnoDB; INSERT INTO t1 VALUES (7,'2004-06-06 04:22:12','v'), (0,'2005-11-13 01:12:31','s'), (9,'2002-05-04 01:50:00','l'), (3,'2004-10-27 10:28:45','y'), (4,'2006-07-22 05:24:23','c'), (2,'2002-05-16 21:34:03','i'), (5,'2008-04-17 10:45:30','h'), (3,'2009-04-21 02:58:02','q'), (1,'2008-01-11 11:01:51','a'), (3,'1900-01-01 00:00:00','v'), (6,'2007-05-17 18:24:57','u'), (7,'2007-08-07 00:00:00','s'), (5,'2001-08-28 00:00:00','y'), (1,'2004-04-16 00:27:28','z'), (204,'2005-05-03 07:06:22','h'), (224,'2009-03-11 17:09:50','p'), (9,'2007-12-08 01:54:28','e'), (5,'2009-07-28 18:19:54','i'), (0,'2008-06-08 00:00:00','y'), (3,'2005-02-09 09:20:26','w'); CREATE TABLE t2 ( col_varchar_nokey VARCHAR(1) NOT NULL ) ENGINE=InnoDB; INSERT INTO t2 VALUES ('v'), ('y'), ('j'), ('c'), ('d'), ('r'); explain SELECT col_varchar_key FROM t1 WHERE col_varchar_key IN (SELECT col_varchar_nokey FROM t2) ORDER BY col_datetime_key LIMIT 4; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort; Start temporary 1 SIMPLE t1 ref col_varchar_key col_varchar_key 3 test.t2.col_varchar_nokey 1 End temporary SELECT col_varchar_key FROM t1 WHERE col_varchar_key IN (SELECT col_varchar_nokey FROM t2) ORDER BY col_datetime_key LIMIT 4; col_varchar_key v y v y DROP TABLE t1, t2; # End of test for bug#12818569. # # Bug#12803439: Assert in replace_subcondition() on update query # CREATE TABLE t1(a INTEGER); INSERT INTO t1 values(1), (2); CREATE TABLE t2(a INTEGER); INSERT INTO t2 VALUES(1), (3); SELECT * FROM t1 WHERE a IN (SELECT a FROM t2 HAVING a IN (SELECT a FROM t2) ) HAVING a IN (SELECT a FROM t2); a 1 DROP TABLE t1, t2; # End of test for bug#12803439. # # Bug#12797534: Segfault in hp_movelink still exists # CREATE TABLE t1 ( g1 VARCHAR(1) NOT NULL ) ENGINE=InnoDB; INSERT INTO t1 VALUES ('d'), ('s'); CREATE TABLE t2 ( pk INT NOT NULL, col_int_key INT NOT NULL, col_varchar_key VARCHAR(1) NOT NULL, col_varchar_nokey VARCHAR(1) NOT NULL, PRIMARY KEY (pk), KEY col_varchar_key(col_varchar_key, col_int_key) ) ENGINE=InnoDB; INSERT INTO t2 VALUES (1,4,'j','j'), (2,6,'v','v'), (3,3,'c','c'), (4,5,'m','m'), (5,3,'d','d'), (6,246,'d','d'), (7,2,'y','y'), (8,9,'t','t'), (9,3,'d','d'), (10,8,'s','s'), (11,1,'r','r'), (12,8,'m','m'), (13,8,'b','b'), (14,5,'x','x'), (15,7,'g','g'), (16,5,'p','p'), (17,1,'q','q'), (18,6,'w','w'), (19,2,'d','d'), (20,9,'e','e'); CREATE TABLE t3 ( pk INTEGER NOT NULL, PRIMARY KEY (pk) ) ENGINE=InnoDB; INSERT INTO t3 VALUES (10); EXPLAIN SELECT * FROM t1 WHERE g1 NOT IN (SELECT grandparent1.col_varchar_nokey AS g1 FROM t2 AS grandparent1 WHERE grandparent1.col_varchar_key IN (SELECT parent1.col_varchar_nokey AS p1 FROM t2 AS parent1 LEFT JOIN t3 AS parent2 USING (pk) ) AND grandparent1.col_varchar_key IS NOT NULL ); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where 2 DEPENDENT SUBQUERY parent1 ALL NULL NULL NULL NULL 20 Start temporary 2 DEPENDENT SUBQUERY parent2 eq_ref PRIMARY PRIMARY 4 test.parent1.pk 1 Using index 2 DEPENDENT SUBQUERY grandparent1 ref col_varchar_key col_varchar_key 3 test.parent1.col_varchar_nokey 1 Using where; End temporary SELECT * FROM t1 WHERE g1 NOT IN (SELECT grandparent1.col_varchar_nokey AS g1 FROM t2 AS grandparent1 WHERE grandparent1.col_varchar_key IN (SELECT parent1.col_varchar_nokey AS p1 FROM t2 AS parent1 LEFT JOIN t3 AS parent2 USING (pk) ) AND grandparent1.col_varchar_key IS NOT NULL ); g1 DROP TABLE t1, t2, t3; CREATE TABLE t1 ( pk INTEGER AUTO_INCREMENT, col_int_key INTEGER , col_varchar_key VARCHAR(1) , col_varchar_nokey VARCHAR(1) , PRIMARY KEY (pk), KEY (col_varchar_key,col_int_key) ) ENGINE=INNODB; INSERT INTO t1 (col_int_key,col_varchar_key,col_varchar_nokey) VALUES (0,'x','x'), (1,'j','j'), (1,'r','r'), (9,'v','v'), (5,'r','r'); CREATE TABLE t2 ( pk INTEGER AUTO_INCREMENT, col_int_key INTEGER , col_varchar_key VARCHAR(1) , col_varchar_nokey VARCHAR(1) , PRIMARY KEY (pk), KEY (col_int_key), KEY (col_varchar_key,col_int_key) ) AUTO_INCREMENT=10 ENGINE=INNODB; INSERT INTO t2 (col_int_key, col_varchar_key, col_varchar_nokey) VALUES (NULL,'x','x'), (NULL,'j','j'), (8,'c','c'); CREATE TABLE t3 SELECT outr.col_varchar_nokey AS x FROM t1 AS outr WHERE outr.col_varchar_nokey IN (SELECT innr.col_varchar_nokey AS y FROM t2 AS innr WHERE innr.col_int_key IS NULL) AND outr.col_varchar_nokey IS NOT NULL AND NOT col_varchar_key IS NULL; SELECT * FROM t3 WHERE x NOT IN (SELECT outr.col_varchar_nokey AS x FROM t1 AS outr WHERE outr.col_varchar_nokey IN (SELECT innr.col_varchar_nokey AS y FROM t2 AS innr WHERE innr.col_int_key IS NULL) AND outr.col_varchar_nokey IS NOT NULL AND NOT col_varchar_key IS NULL); x DROP TABLE t1, t2, t3; # End of test for bug#12797534. # # Bug#12714094: Assert in optimize_semijoin_nests() # CREATE TABLE it ( pk int NOT NULL, col_varchar VARCHAR(10) DEFAULT NULL, PRIMARY KEY (pk) ) ENGINE=MyISAM; INSERT INTO it VALUES (1, 'g'); CREATE TABLE ot SELECT alias1.pk AS field1 FROM it AS alias1 LEFT JOIN it AS alias2 ON alias1.col_varchar = alias2.col_varchar ; SELECT * FROM ot WHERE field1 IN ( SELECT alias1.pk FROM it AS alias1 LEFT JOIN it AS alias2 ON alias1.col_varchar = alias2.col_varchar ); field1 1 DROP TABLE it, ot; # End of test for bug#12714094 # # Bug#12867557: Valgrind: conditional jump/move at key_cmp # CREATE TABLE t1 ( pk INTEGER AUTO_INCREMENT, col_int_key INTEGER, PRIMARY KEY (pk), KEY (col_int_key) ) AUTO_INCREMENT=10; INSERT INTO t1 (col_int_key) VALUES (8); CREATE TABLE t2 ( pk INTEGER AUTO_INCREMENT, col_int_key INTEGER, col_time_key TIME, PRIMARY KEY (pk), KEY (col_int_key), KEY (col_time_key) ) AUTO_INCREMENT=10; INSERT INTO t2 (col_int_key, col_time_key) VALUES (8, '22:55:23.019225'), (7, '10:19:31.050677'), (1, '14:40:36.038608'), (7, '04:37:47.062416'), (9, '19:34:06.054514'), (NULL,'20:35:33.022996'), (1, NULL), (9, '14:43:37.057393'), (2, '02:23:09.043438'), (9, '01:22:45.041064'), (2, '00:00:00'), (4, '00:13:25.038482'), (0, '03:47:16.042671'), (4, '01:41:48.007423'), (8, '00:00:00'), (NULL, '22:32:04.047407'), (NULL, '16:44:14.028443'), (0, '17:38:37.059754'), (NULL, '08:46:48.042388'), (8, '14:11:27.044095'); CREATE TABLE t0 SELECT DISTINCT grandparent1.col_time_key AS g1 FROM t2 AS grandparent1 WHERE grandparent1.col_int_key IN (SELECT parent1.col_int_key AS p1 FROM t1 AS parent1) AND grandparent1.pk > 9; UPDATE t0 SET g1 = g1 WHERE g1 IN (SELECT grandparent1.col_time_key AS g1 FROM t2 AS grandparent1 WHERE grandparent1.col_int_key IN (SELECT parent1.col_int_key AS p1 FROM t1 AS parent1) AND grandparent1.pk > 9); DROP TABLE t0, t1, t2; # End of test for bug#12867557 # # Bug#12711441: crash in fix_after_pullout # CREATE TABLE t1 ( pk int NOT NULL, col_int_nokey int DEFAULT NULL, col_int_key int DEFAULT NULL, col_time_key time DEFAULT NULL, col_varchar_key varchar(1) DEFAULT NULL, PRIMARY KEY (pk) ); CREATE VIEW v1 AS SELECT * FROM t1; CREATE TABLE t2 ( col_int_key int DEFAULT NULL, col_varchar_key varchar(1) DEFAULT NULL, col_varchar_nokey varchar(1) DEFAULT NULL, KEY col_varchar_key(col_varchar_key, col_int_key) ); CREATE TABLE t3 ( pk int NOT NULL, col_int_key INT DEFAULT NULL, PRIMARY KEY (pk) ); CREATE TABLE t4 ( col_int_nokey INT DEFAULT NULL, col_varchar_key varchar(1) DEFAULT NULL, col_varchar_nokey varchar(1) DEFAULT NULL, KEY col_varchar_key(col_varchar_key) ); CREATE TABLE ts SELECT alias1.col_time_key AS field1 FROM v1 AS alias1 RIGHT JOIN t3 AS alias2 ON alias2.col_int_key = alias1.col_int_nokey WHERE alias1.pk >= SOME( SELECT SQ1_alias1.pk AS SQ1_field1 FROM t3 AS SQ1_alias1 INNER JOIN (t2 AS SQ1_alias2 INNER JOIN t4 AS SQ1_alias3 ON SQ1_alias3.col_varchar_key = SQ1_alias2.col_varchar_nokey) ON SQ1_alias3.col_int_nokey = SQ1_alias2.col_int_key WHERE SQ1_alias2.col_varchar_key <= alias1.col_varchar_key AND SQ1_alias3.col_varchar_nokey <> alias1.col_varchar_key) ; SELECT * FROM ts WHERE field1 IN ( SELECT alias1.col_time_key AS field1 FROM v1 AS alias1 RIGHT JOIN t3 AS alias2 ON alias2.col_int_key = alias1.col_int_nokey WHERE alias1.pk >= SOME( SELECT SQ1_alias1.pk AS SQ1_field1 FROM t3 AS SQ1_alias1 INNER JOIN (t2 AS SQ1_alias2 INNER JOIN t4 AS SQ1_alias3 ON SQ1_alias3.col_varchar_key = SQ1_alias2.col_varchar_nokey) ON SQ1_alias3.col_int_nokey = SQ1_alias2.col_int_key WHERE SQ1_alias2.col_varchar_key <= alias1.col_varchar_key AND SQ1_alias3.col_varchar_nokey <> alias1.col_varchar_key) ); field1 DROP TABLE t1, t2, t3, t4, ts; DROP VIEW v1; # End of test for bug#12711441. # # Bug#12664936: Same query executed as where subquery ... # CREATE TABLE t1 ( col_varchar_key VARCHAR(1), KEY col_varchar_key (col_varchar_key) ); INSERT INTO t1 VALUES ('o'), ('w'), ('m'), ('q'), ('f'), ('p'), ('j'), ('c'); CREATE TABLE t2 ( col_int_nokey INTEGER, col_int_key INTEGER, col_varchar_key varchar(1), KEY col_int_key (col_int_key) ); INSERT INTO t2 VALUES (8,5,'u'),(4,5,'p'),(8,1,'o'),(NULL,7,'v'), (1,2,'g'),(2,1,'q'),(NULL,7,'l'),(3,1,'n'); CREATE TABLE t4 SELECT t2.col_int_nokey, t2.col_varchar_key FROM t1 JOIN t2 ON t2.col_varchar_key = t1.col_varchar_key WHERE t2.col_int_key = 1; EXPLAIN SELECT * FROM t4 WHERE (col_int_nokey, col_varchar_key) IN (SELECT t2.col_int_nokey, t2.col_varchar_key FROM t1 JOIN t2 ON t2.col_varchar_key = t1.col_varchar_key WHERE t2.col_int_key = 1 ); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t1 ref col_varchar_key col_varchar_key 4 test.t4.col_varchar_key 2 Using index 1 SIMPLE t2 ref col_int_key col_int_key 5 const 3 Using where; FirstMatch(t4) SELECT * FROM t4 WHERE (col_int_nokey, col_varchar_key) IN (SELECT t2.col_int_nokey, t2.col_varchar_key FROM t1 JOIN t2 ON t2.col_varchar_key = t1.col_varchar_key WHERE t2.col_int_key = 1 ); col_int_nokey col_varchar_key 8 o 2 q DROP TABLE t1, t2, t4; # End of test for bug#12664936. # # Bug#13340270: assertion table->sort.record_pointers == __null # CREATE TABLE t1 ( pk int NOT NULL, col_int_key int DEFAULT NULL, col_varchar_key varchar(1) DEFAULT NULL, col_varchar_nokey varchar(1) DEFAULT NULL, PRIMARY KEY (pk), KEY col_int_key (col_int_key), KEY col_varchar_key (col_varchar_key, col_int_key) ) ENGINE=InnoDB; INSERT INTO t1 VALUES (10,8,'x','x'), (11,7,'d','d'), (12,1,'r','r'), (13,7,'f','f'), (14,9,'y','y'), (15,NULL,'u','u'), (16,1,'m','m'), (17,9,NULL,NULL), (18,2,'o','o'), (19,9,'w','w'), (20,2,'m','m'), (21,4,'q','q'); CREATE TABLE t2 SELECT alias1.col_varchar_nokey AS field1 FROM t1 AS alias1 JOIN t1 AS alias2 ON alias2.col_int_key = alias1.pk OR alias2.col_int_key = alias1.col_int_key WHERE alias1.pk = 58 OR alias1.col_varchar_key = 'o' ; EXPLAIN SELECT * FROM t2 WHERE (field1) IN (SELECT alias1.col_varchar_nokey AS field1 FROM t1 AS alias1 JOIN t1 AS alias2 ON alias2.col_int_key = alias1.pk OR alias2.col_int_key = alias1.col_int_key WHERE alias1.pk = 58 OR alias1.col_varchar_key = 'o' ); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE alias1 index_merge PRIMARY,col_int_key,col_varchar_key col_varchar_key,PRIMARY 4,4 NULL 2 Using sort_union(col_varchar_key,PRIMARY); Using where 1 SIMPLE alias2 ALL col_int_key NULL NULL NULL 12 Range checked for each record (index map: 0x2); FirstMatch(t2) SELECT * FROM t2 WHERE (field1) IN (SELECT alias1.col_varchar_nokey AS field1 FROM t1 AS alias1 JOIN t1 AS alias2 ON alias2.col_int_key = alias1.pk OR alias2.col_int_key = alias1.col_int_key WHERE alias1.pk = 58 OR alias1.col_varchar_key = 'o' ); field1 o o DROP TABLE t1, t2; # End of test for bug#13340270. # # Bug#13335319: Seg fault when analyzing FirstMatch semi-join strategy # CREATE TABLE ot1(a INTEGER); INSERT INTO ot1 VALUES(1), (2), (3); CREATE TABLE ot2(a INTEGER); INSERT INTO ot2 VALUES(1), (2), (4), (6), (8), (10); CREATE TABLE it1(a INTEGER); INSERT INTO it1 VALUES(1), (3), (5), (7); CREATE TABLE it2(a INTEGER); INSERT INTO it2 VALUES(1), (3), (5), (7), (9); explain SELECT ot1.a, ot2.a FROM ot1, ot2 WHERE ot1.a IN (SELECT a FROM it1) AND ot2.a IN (SELECT a FROM it2); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot1 ALL NULL NULL NULL NULL 3 Start temporary 1 SIMPLE it1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE it2 ALL NULL NULL NULL NULL 5 Using join buffer (Block Nested Loop) 1 SIMPLE ot2 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT ot1.a, ot2.a FROM ot1, ot2 WHERE ot1.a IN (SELECT a FROM it1) AND ot2.a IN (SELECT a FROM it2); a a 1 1 3 1 DROP TABLE ot1, ot2, it1, it2; # End of test for bug#13335319. # # Bug#13334882: Assertion keypart_map failed in MyIsam function # CREATE TABLE t1 ( pk int NOT NULL, col_int_nokey INT NOT NULL, col_int_key INT NOT NULL, PRIMARY KEY (pk), KEY col_int_key (col_int_key) ) ENGINE=MyISAM; INSERT INTO t1 VALUES (1,4,0), (2,6,8), (3,3,1), (7,2,6), (8,9,1), (9,3,6), (10,8,2), (11,1,4), (12,8,8), (13,8,4), (14,5,4); CREATE TABLE t2 ( pk int NOT NULL, col_int_nokey int NOT NULL, col_int_key int NOT NULL, PRIMARY KEY (pk), KEY col_int_key (col_int_key) ) ENGINE=MyISAM; INSERT INTO t2 VALUES (10,8,7); CREATE TABLE t3 SELECT grandparent1.col_int_nokey AS g1 FROM t1 AS grandparent1 WHERE (grandparent1.col_int_nokey, grandparent1.col_int_key) IN (SELECT parent1.col_int_key AS p1, parent1.col_int_key AS p2 FROM t1 AS parent1 LEFT JOIN t2 AS parent2 ON parent1.col_int_nokey = parent2.col_int_key ) AND grandparent1.col_int_key <> 3 ; explain SELECT * FROM t3 WHERE g1 NOT IN (SELECT grandparent1.col_int_nokey AS g1 FROM t1 AS grandparent1 WHERE (grandparent1.col_int_nokey, grandparent1.col_int_key) IN (SELECT parent1.col_int_key AS p1, parent1.col_int_key AS p2 FROM t1 AS parent1 LEFT JOIN t2 AS parent2 ON parent1.col_int_nokey = parent2.col_int_key ) AND grandparent1.col_int_key <> 3 ); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 2 DEPENDENT SUBQUERY grandparent1 ref col_int_key col_int_key 4 func 2 Using where 2 DEPENDENT SUBQUERY parent1 ref col_int_key col_int_key 4 func 2 Using where 2 DEPENDENT SUBQUERY parent2 ref col_int_key col_int_key 4 test.parent1.col_int_nokey 2 Using index; FirstMatch(grandparent1) explain format=json SELECT * FROM t3 WHERE g1 NOT IN (SELECT grandparent1.col_int_nokey AS g1 FROM t1 AS grandparent1 WHERE (grandparent1.col_int_nokey, grandparent1.col_int_key) IN (SELECT parent1.col_int_key AS p1, parent1.col_int_key AS p2 FROM t1 AS parent1 LEFT JOIN t2 AS parent2 ON parent1.col_int_nokey = parent2.col_int_key ) AND grandparent1.col_int_key <> 3 ); EXPLAIN { "query_block": { "select_id": 1, "table": { "message": "Impossible WHERE noticed after reading const tables", "attached_subqueries": [ { "dependent": true, "cacheable": false, "query_block": { "select_id": 2, "nested_loop": [ { "table": { "table_name": "grandparent1", "access_type": "ref", "possible_keys": [ "col_int_key" ], "key": "col_int_key", "used_key_parts": [ "col_int_key" ], "key_length": "4", "ref": [ "func" ], "rows": 2, "filtered": 100, "attached_condition": "((`test`.`grandparent1`.`col_int_key` = `test`.`grandparent1`.`col_int_nokey`) and (`test`.`grandparent1`.`col_int_key` <> 3) and (<cache>('8') = `test`.`grandparent1`.`col_int_nokey`))" } }, { "table": { "table_name": "parent1", "access_type": "ref", "possible_keys": [ "col_int_key" ], "key": "col_int_key", "used_key_parts": [ "col_int_key" ], "key_length": "4", "ref": [ "func" ], "rows": 2, "filtered": 100, "attached_condition": "(`test`.`parent1`.`col_int_key` = `test`.`grandparent1`.`col_int_nokey`)" } }, { "table": { "table_name": "parent2", "access_type": "ref", "possible_keys": [ "col_int_key" ], "key": "col_int_key", "used_key_parts": [ "col_int_key" ], "key_length": "4", "ref": [ "test.parent1.col_int_nokey" ], "rows": 2, "filtered": 100, "using_index": true, "first_match": "grandparent1" } } ] } } ] } } } Warnings: Note 1003 /* select#1 */ select '8' AS `g1` from dual where (not(<in_optimizer>('8',<exists>(/* select#2 */ select 1 from `test`.`t1` `grandparent1` semi join (`test`.`t1` `parent1` left join `test`.`t2` `parent2` on((`test`.`parent1`.`col_int_nokey` = `test`.`parent2`.`col_int_key`))) where ((`test`.`grandparent1`.`col_int_key` = `test`.`grandparent1`.`col_int_nokey`) and (`test`.`parent1`.`col_int_key` = `test`.`grandparent1`.`col_int_nokey`) and (`test`.`grandparent1`.`col_int_key` <> 3) and (<cache>('8') = `test`.`grandparent1`.`col_int_nokey`)))))) SELECT * FROM t3 WHERE g1 NOT IN (SELECT grandparent1.col_int_nokey AS g1 FROM t1 AS grandparent1 WHERE (grandparent1.col_int_nokey, grandparent1.col_int_key) IN (SELECT parent1.col_int_key AS p1, parent1.col_int_key AS p2 FROM t1 AS parent1 LEFT JOIN t2 AS parent2 ON parent1.col_int_nokey = parent2.col_int_key ) AND grandparent1.col_int_key <> 3 ); g1 DROP TABLE t1, t2, t3; # End of test for bug#13334882. # # Bug#13339643: Assertion on JOIN::flatten_subqueries on second execution # CREATE TABLE t1 ( col_int_nokey INT, col_varchar_nokey VARCHAR(1) ); INSERT INTO t1 VALUES (1,'o'), (2,'t'); CREATE TABLE t2 LIKE t1; INSERT INTO t2 VALUES (1,'o'), (4,'f'); CREATE VIEW v_t2 AS SELECT * FROM t2; CREATE TABLE t3 LIKE t1; INSERT INTO t3 VALUES (1,'o'), (4,'f'); explain SELECT alias1.col_varchar_nokey FROM t1 AS alias1 INNER JOIN v_t2 AS alias2 ON alias2.col_int_nokey = alias1.col_int_nokey AND 'o' IN (SELECT col_varchar_nokey FROM t3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; FirstMatch 1 SIMPLE alias1 ALL NULL NULL NULL NULL 2 Using join buffer (Block Nested Loop) 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) SELECT alias1.col_varchar_nokey FROM t1 AS alias1 INNER JOIN v_t2 AS alias2 ON alias2.col_int_nokey = alias1.col_int_nokey AND 'o' IN (SELECT col_varchar_nokey FROM t3); col_varchar_nokey o PREPARE stmt FROM "SELECT alias1.col_varchar_nokey FROM t1 AS alias1 INNER JOIN v_t2 AS alias2 ON alias2.col_int_nokey = alias1.col_int_nokey AND 'o' IN (SELECT col_varchar_nokey FROM t3)"; EXECUTE stmt; col_varchar_nokey o DROP VIEW v_t2; DROP TABLE t1, t2, t3; # End of test for bug#13339643. # # Bug#13424134: Wrong result on JOIN + nested WHERE ... IN clauses # CREATE TABLE t1 ( pk int NOT NULL, col_int_nokey int NOT NULL, col_int_key int NOT NULL, PRIMARY KEY (pk), KEY col_int_key (col_int_key) ) ENGINE=MyIsam; INSERT INTO t1 VALUES (10,1,7), (13,7,3), (18,0,1), (23,8,1); CREATE TABLE t2 ( pk int NOT NULL, col_int_key int NOT NULL, PRIMARY KEY (pk), KEY col_int_key (col_int_key) ) ENGINE=MyIsam; INSERT INTO t2 VALUES (1,7); EXPLAIN SELECT t1a.* FROM t1 AS t1a JOIN t1 AS t1b USING ( col_int_nokey ) WHERE t1a.col_int_key IN ( SELECT pk FROM t2 WHERE col_int_key IN ( SELECT col_int_nokey FROM t1 ) ); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 system PRIMARY,col_int_key NULL NULL NULL 1 NULL 1 SIMPLE t1a ref col_int_key col_int_key 4 const 1 NULL 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t1a); Using join buffer (Block Nested Loop) 1 SIMPLE t1b ALL NULL NULL NULL NULL 4 Using where; Using join buffer (Block Nested Loop) SELECT t1a.* FROM t1 AS t1a JOIN t1 AS t1b USING ( col_int_nokey ) WHERE t1a.col_int_key IN ( SELECT pk FROM t2 WHERE col_int_key IN ( SELECT col_int_nokey FROM t1 ) ); pk col_int_nokey col_int_key 18 0 1 23 8 1 ALTER TABLE t1 ENGINE=Innodb; ALTER TABLE t2 ENGINE=Innodb; SELECT t1a.* FROM t1 AS t1a JOIN t1 AS t1b USING ( col_int_nokey ) WHERE t1a.col_int_key IN ( SELECT pk FROM t2 WHERE col_int_key IN ( SELECT col_int_nokey FROM t1 ) ); pk col_int_nokey col_int_key 18 0 1 23 8 1 DROP TABLE t1, t2; # End of test for bug#13424134. # # Bug#13414014: Extra rows in result on semijoin query with where ... # CREATE TABLE t1 ( c INT, d INT, a VARCHAR(1), b VARCHAR(1), KEY a (a) ); INSERT INTO t1 VALUES (NULL,8,'x','x'), (7,4,'q','q'), (6,8,'c','c'); CREATE TABLE t2 ( a VARCHAR(1), KEY a (a) ); INSERT INTO t2 VALUES ('c'), (NULL), ('x'), ('q'); explain SELECT * FROM t2 AS ot WHERE (a, a) IN (SELECT a, b FROM t1 AS it WHERE it.a = 'x' OR it.c > it.d ) ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot index a a 4 NULL 4 Using index 1 SIMPLE it ALL a NULL NULL NULL 3 Using where; FirstMatch(ot); Using join buffer (Block Nested Loop) SELECT * FROM t2 AS ot WHERE (a, a) IN (SELECT a, b FROM t1 AS it WHERE it.a = 'x' OR it.c > it.d ) ; a x q DROP TABLE t1, t2; # End of test for bug#13414014. # # Bug#13545215: Missing rows on nested in-subquery with materialization # CREATE TABLE t1 ( col_int_key int, col_varchar_key varchar(1), col_varchar_nokey varchar(1), KEY col_int_key (col_int_key), KEY col_varchar_key (col_varchar_key,col_int_key) ) ; INSERT INTO t1 VALUES (8,'x','x'), (0,'p','p'), (8,'c','c'); CREATE TABLE t2 ( pk int NOT NULL, col_varchar_key varchar(1), col_varchar_nokey varchar(1), PRIMARY KEY (pk), KEY col_varchar_key (col_varchar_key) ); INSERT INTO t2 VALUES (1,'v','v'), (2,'v','v'), (3,'c','c'), (4,NULL,NULL), (5,'x','x'), (6,'i','i'), (7,'e','e'), (8,'p','p'); CREATE TABLE t3 ( col_int_nokey int ); INSERT INTO t3 VALUES (7); explain SELECT grandparent1.col_varchar_nokey FROM t1 AS grandparent1 JOIN t1 AS grandparent2 USING (col_int_key) WHERE grandparent1.col_varchar_key IN ( SELECT col_varchar_nokey FROM t2 AS parent1 WHERE col_varchar_key IN ( SELECT child1.col_varchar_nokey FROM t2 AS child1 LEFT JOIN t3 AS child2 ON child1.pk < child2.col_int_nokey ) ); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE child1 ALL NULL NULL NULL NULL 8 Start temporary 1 SIMPLE child2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE grandparent1 ALL col_int_key,col_varchar_key NULL NULL NULL 3 Using join buffer (Block Nested Loop) 1 SIMPLE parent1 ALL col_varchar_key NULL NULL NULL 8 Using where; End temporary; Using join buffer (Block Nested Loop) 1 SIMPLE grandparent2 index col_int_key col_int_key 5 NULL 3 Using where; Using index; Using join buffer (Block Nested Loop) SELECT grandparent1.col_varchar_nokey FROM t1 AS grandparent1 JOIN t1 AS grandparent2 USING (col_int_key) WHERE grandparent1.col_varchar_key IN ( SELECT col_varchar_nokey FROM t2 AS parent1 WHERE col_varchar_key IN ( SELECT child1.col_varchar_nokey FROM t2 AS child1 LEFT JOIN t3 AS child2 ON child1.pk < child2.col_int_nokey ) ); col_varchar_nokey c c p x x DROP TABLE t1, t2, t3; # End of test for bug#13545215. # # BUG#13553211 - MISSING ROWS ON SELECT WITH IN-SUBQUERY AND # MATERIALIZATION + SEMIJOIN ON # CREATE TABLE t1 ( col_int_key int(11) DEFAULT NULL, col_varchar_key varchar(1) DEFAULT NULL, col_varchar_nokey varchar(1) DEFAULT NULL, KEY col_int_key (col_int_key), KEY col_varchar_key (col_varchar_key,col_int_key) ); INSERT INTO t1 VALUES (4,'v','v'); INSERT INTO t1 VALUES (62,'v','v'); INSERT INTO t1 VALUES (7,'c','c'); INSERT INTO t1 VALUES (1,NULL,NULL); EXPLAIN SELECT alias1.col_varchar_nokey AS a1_nokey, alias1.col_varchar_key AS a1_key, alias2.col_varchar_nokey AS a2_nokey FROM t1 AS alias1, t1 AS alias2 WHERE (alias1.col_varchar_nokey,alias2.col_varchar_nokey) IN ( SELECT SQ2_alias2.col_varchar_nokey, SQ2_alias1.col_varchar_key FROM t1 AS SQ2_alias1, t1 AS SQ2_alias2 ) ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE alias1 ALL NULL NULL NULL NULL 4 NULL 1 SIMPLE alias2 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE SQ2_alias1 ref col_varchar_key col_varchar_key 4 test.alias2.col_varchar_nokey 1 Using index 1 SIMPLE SQ2_alias2 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(alias2) SELECT alias1.col_varchar_nokey AS a1_nokey, alias1.col_varchar_key AS a1_key, alias2.col_varchar_nokey AS a2_nokey FROM t1 AS alias1, t1 AS alias2 WHERE (alias1.col_varchar_nokey,alias2.col_varchar_nokey) IN ( SELECT SQ2_alias2.col_varchar_nokey, SQ2_alias1.col_varchar_key FROM t1 AS SQ2_alias1, t1 AS SQ2_alias2 ) ; a1_nokey a1_key a2_nokey c c c c c v c c v v v c v v c v v v v v v v v v v v v DROP TABLE t1; # # Bug#13541406: Wrong result with loosescan on select .. where .. in # CREATE TABLE t1 ( col_int_key INT NOT NULL, col_varchar_nokey VARCHAR(1) NOT NULL, KEY col_int_key (col_int_key) ) ENGINE=InnoDB; INSERT INTO t1 VALUES (7,'v'), (0,'s'), (9,'l'), (3,'y'), (4,'c'), (2,'i'), (5,'h'), (3,'q'), (1,'a'), (3,'v'), (6,'u'), (7,'s'), (5,'y'), (1,'z'), (204,'h'), (224,'p'), (9,'e'), (5,'i'), (0,'y'), (3,'w'); CREATE TABLE t2 ( pk INT NOT NULL, col_int_key INT NOT NULL, col_varchar_key VARCHAR(1) NOT NULL, col_varchar_nokey VARCHAR(1) NOT NULL, PRIMARY KEY (pk), KEY col_int_key (col_int_key), KEY col_varchar_key (col_varchar_key,col_int_key) ) ENGINE=InnoDB; INSERT INTO t2 VALUES (1,0,'j','j'), (2,8,'v','v'), (3,1,'c','c'), (4,8,'m','m'), (5,9,'d','d'), (6,24,'d','d'), (7,6,'y','y'), (8,1,'t','t'), (9,6,'d','d'), (10,2,'s','s'), (11,4,'r','r'), (12,8,'m','m'), (13,4,'b','b'), (14,4,'x','x'), (15,7,'g','g'), (16,4,'p','p'), (17,1,'q','q'), (18,9,'w','w'), (19,4,'d','d'), (20,8,'e','e'); # This query should never use a LooseScan strategy explain SELECT ot1.col_int_key AS field1 FROM t2 AS ot1, t2 AS ot2 WHERE (ot1.col_varchar_key, ot2.col_varchar_nokey) IN ( SELECT it2.col_varchar_nokey, it1.col_varchar_key FROM t2 AS it1 JOIN t1 AS it2 ON it2.col_int_key = it1.pk); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot2 ALL NULL NULL NULL NULL 20 Start temporary 1 SIMPLE it1 ref PRIMARY,col_varchar_key col_varchar_key 3 test.ot2.col_varchar_nokey 1 Using index 1 SIMPLE it2 ref col_int_key col_int_key 4 test.it1.pk 1 NULL 1 SIMPLE ot1 ref col_varchar_key col_varchar_key 3 test.it2.col_varchar_nokey 1 Using index; End temporary SELECT ot1.col_int_key AS field1 FROM t2 AS ot1, t2 AS ot2 WHERE (ot1.col_varchar_key, ot2.col_varchar_nokey) IN ( SELECT it2.col_varchar_nokey, it1.col_varchar_key FROM t2 AS it1 JOIN t1 AS it2 ON it2.col_int_key = it1.pk); field1 1 1 1 2 6 6 6 6 6 8 8 8 8 8 8 9 DROP TABLE t1, t2; # End of test for bug#13541406. # # Bug#13576391: Missing rows on select with in-subquery and # batched-key-access=on and semijoin # CREATE TABLE t1 ( col_int_nokey int NOT NULL, col_varchar_key varchar(1) NOT NULL, KEY col_varchar_key (col_varchar_key) ) engine=InnoDB; INSERT INTO t1 VALUES (1,'v'), (7,'s'), (4,'l'), (7,'y'), (0,'c'), (2,'i'), (9,'h'), (4,'q'), (0,'a'), (9,'v'), (1,'u'), (3,'s'), (8,'y'), (8,'z'), (18,'h'), (84,'p'), (6,'e'), (3,'i'), (6,'y'), (6,'w'); CREATE TABLE t2 ( col_int_nokey int NOT NULL, col_varchar_nokey varchar(1) NOT NULL ) engine=InnoDB; INSERT INTO t2 VALUES (4,'j'), (6,'v'), (3,'c'), (5,'m'), (3,'d'), (246,'d'), (2,'y'), (9,'t'), (3,'d'), (8,'s'), (1,'r'), (8,'m'), (8,'b'), (5,'x'), (7,'g'), (5,'p'), (1,'q'), (6,'w'), (2,'d'), (9,'e'); explain SELECT col_varchar_nokey FROM t2 AS ot WHERE col_varchar_nokey IN ( SELECT col_varchar_key FROM t1 AS it WHERE it.col_int_nokey <= it.col_int_nokey AND NOT ot.col_int_nokey < 2 ) ORDER BY col_varchar_nokey; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot ALL NULL NULL NULL NULL 20 Using where; Using filesort 1 SIMPLE it ref col_varchar_key col_varchar_key 3 test.ot.col_varchar_nokey 1 FirstMatch(ot) SELECT col_varchar_nokey FROM t2 AS ot WHERE col_varchar_nokey IN ( SELECT col_varchar_key FROM t1 AS it WHERE it.col_int_nokey <= it.col_int_nokey AND NOT ot.col_int_nokey < 2 ) ORDER BY col_varchar_nokey; col_varchar_nokey c e p s v w y ALTER TABLE t1 ENGINE=MyISAM; ALTER TABLE t2 ENGINE=MyISAM; explain SELECT col_varchar_nokey FROM t2 AS ot WHERE col_varchar_nokey IN ( SELECT col_varchar_key FROM t1 AS it WHERE it.col_int_nokey <= it.col_int_nokey AND NOT ot.col_int_nokey < 2 ) ORDER BY col_varchar_nokey; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot ALL NULL NULL NULL NULL 20 Using where; Using filesort 1 SIMPLE it ref col_varchar_key col_varchar_key 3 test.ot.col_varchar_nokey 2 FirstMatch(ot) SELECT col_varchar_nokey FROM t2 AS ot WHERE col_varchar_nokey IN ( SELECT col_varchar_key FROM t1 AS it WHERE it.col_int_nokey <= it.col_int_nokey AND NOT ot.col_int_nokey < 2 ) ORDER BY col_varchar_nokey; col_varchar_nokey c e p s v w y ALTER TABLE t1 ENGINE=Memory; ALTER TABLE t2 ENGINE=Memory; explain SELECT col_varchar_nokey FROM t2 AS ot WHERE col_varchar_nokey IN ( SELECT col_varchar_key FROM t1 AS it WHERE it.col_int_nokey <= it.col_int_nokey AND NOT ot.col_int_nokey < 2 ) ORDER BY col_varchar_nokey; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot ALL NULL NULL NULL NULL 20 Using where; Using filesort 1 SIMPLE it ref col_varchar_key col_varchar_key 3 test.ot.col_varchar_nokey 2 FirstMatch(ot) SELECT col_varchar_nokey FROM t2 AS ot WHERE col_varchar_nokey IN ( SELECT col_varchar_key FROM t1 AS it WHERE it.col_int_nokey <= it.col_int_nokey AND NOT ot.col_int_nokey < 2 ) ORDER BY col_varchar_nokey; col_varchar_nokey c e p s v w y DROP TABLE t1, t2; # End of test for bug#13576391. # # Bug #13589848 "MISSING ROW ON SELECT WITH NESTED IN CLAUSES WHEN LOOSESCAN=ON" # CREATE TABLE t1 ( id INT, col_varchar_key VARCHAR(1), col_varchar_nokey VARCHAR(1), KEY (col_varchar_key) ); INSERT INTO t1 VALUES (100,'m','m'), (200,'b','b'), (300,'x','x'); CREATE TABLE t2 ( col_varchar_key VARCHAR(1), col_varchar_nokey VARCHAR(1), KEY (col_varchar_key) ); INSERT INTO t2 VALUES ('b','b'); CREATE TABLE t3 ( col_varchar_key VARCHAR(1), col_varchar_nokey VARCHAR(1), KEY (col_varchar_key) ); INSERT INTO t3 VALUES ('k','k'); EXPLAIN SELECT GP1.id FROM t1 AS GP1 JOIN t3 AS GP2 ON GP2.col_varchar_key <> GP1.col_varchar_nokey WHERE (GP1.col_varchar_nokey, GP1.col_varchar_nokey) IN ( SELECT col_varchar_nokey, col_varchar_nokey FROM t1 WHERE col_varchar_nokey IN ( SELECT col_varchar_key FROM t2 LEFT JOIN t3 USING (col_varchar_key) ) ) ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE GP2 system NULL NULL NULL NULL 1 NULL 1 SIMPLE t2 index col_varchar_key col_varchar_key 4 NULL 1 Using where; Using index; Start temporary 1 SIMPLE GP1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 index col_varchar_key col_varchar_key 4 NULL 1 Using where; Using index; Using join buffer (Block Nested Loop) 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT GP1.id FROM t1 AS GP1 JOIN t3 AS GP2 ON GP2.col_varchar_key <> GP1.col_varchar_nokey WHERE (GP1.col_varchar_nokey, GP1.col_varchar_nokey) IN ( SELECT col_varchar_nokey, col_varchar_nokey FROM t1 WHERE col_varchar_nokey IN ( SELECT col_varchar_key FROM t2 LEFT JOIN t3 USING (col_varchar_key) ) ) ; id 200 DROP TABLE t1,t2,t3; # # Bug #13596176: Missing row on select with nested in clause when # matr=on and bnl=off + MyISAM # CREATE TABLE t1 ( int_key int DEFAULT NULL, vc_key varchar(1) DEFAULT NULL, vc_nokey varchar(1) DEFAULT NULL, KEY int_key (int_key), KEY vc_key (vc_key, int_key) ) ENGINE=MyISAM; INSERT INTO t1 VALUES (8,'x','x'), (7,'d','d'), (1,'r','r'), (7,'f','f'), (9,'y','y'), (NULL,'u','u'), (1,'m','m'), (9,NULL,NULL), (2,'o','o'), (9,'w','w'), (2,'m','m'), (4,'q','q'), (0,NULL,NULL), (4,'d','d'), (8,'g','g'), (NULL,'x','x'), (NULL,'f','f'), (0,'p','p'), (NULL,'j','j'), (8,'c','c'); CREATE TABLE t2 ( int_key int DEFAULT NULL, vc_key varchar(1) DEFAULT NULL, KEY int_key (int_key), KEY vc_key (vc_key, int_key) ) ENGINE=MyISAM; INSERT INTO t2 VALUES (8,'g'); explain SELECT vc_key FROM t1 as outr WHERE (vc_nokey, vc_key ) IN (SELECT vc_nokey, vc_nokey FROM t1 middle WHERE vc_nokey IN (SELECT child1.vc_key FROM t2 AS child1 JOIN t1 AS child2 USING (int_key) ) ); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE child1 index int_key,vc_key vc_key 9 NULL 1 Using where; Using index; Start temporary 1 SIMPLE outr ref vc_key vc_key 4 test.child1.vc_key 3 Using where 1 SIMPLE child2 ref int_key int_key 5 test.child1.int_key 3 Using index 1 SIMPLE middle ALL NULL NULL NULL NULL 20 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT vc_key FROM t1 as outr WHERE (vc_nokey, vc_key ) IN (SELECT vc_nokey, vc_nokey FROM t1 middle WHERE vc_nokey IN (SELECT child1.vc_key FROM t2 AS child1 JOIN t1 AS child2 USING (int_key) ) ); vc_key g DROP TABLE t1, t2; # End of test for bug#13596176. # # BUG#11754478: MAX/MIN + SUBQUERY + AND FAILS TO RETURN ANY ROWS # BUG#13599013: MAX/MIN + SUBQUERY IN WHERE CLAUSE MATCHING NO # ROWS + INDEX DOES NOT RETURN NULL # CREATE TABLE t1 ( pk int(11) PRIMARY KEY, int_key int(11), KEY int_key (int_key) ); INSERT INTO t1 VALUES (1,0),(2,0),(3,2),(4,0),(5,3),(6,0); SELECT MIN(int_key) FROM t1 WHERE (4, 4) IN (SELECT 1, 2); MIN(int_key) NULL SELECT MIN(int_key) FROM t1 WHERE (4, 4) IN (SELECT 4, 4); MIN(int_key) 0 SELECT MIN(pk) FROM t1 WHERE pk IN (SELECT int_key FROM t1) AND pk = 6; MIN(pk) NULL DROP TABLE t1; # BUG#13726217: Crash in Item_ident::fix_after_pullout() CREATE TABLE t1(a INTEGER) engine=innodb; INSERT INTO t1 VALUES (0); SELECT 0 FROM t1 WHERE 0 IN (SELECT 0 FROM t1 WHERE 0 LIKE (SELECT elt(a, 0) AS b FROM t1 GROUP BY a HAVING b ) ); 0 DROP TABLE t1; # End of test for bug#13726217. # BUG#13773979: Missing rows on second execution of prepared statement CREATE TABLE t1 ( col_int_nokey INT, col_int_key INT, col_varchar_key VARCHAR(1) ); INSERT INTO t1 VALUES (1,7,'v'), (7,0,'s'), (4,9,'l'), (7,3,'y'), (2,2,'i'), (9,5,'h'), (0,1,'a'), (9,3,'v'); CREATE VIEW v1 AS SELECT * FROM t1; SELECT * FROM t1 WHERE col_int_key IN ( SELECT alias1.col_int_nokey AS field1 FROM v1 AS alias1 WHERE alias1.col_varchar_key < 'v' ); col_int_nokey col_int_key col_varchar_key 1 7 v 2 2 i 4 9 l 7 0 s prepare stmt FROM "SELECT * FROM t1 WHERE col_int_key IN ( SELECT alias1.col_int_nokey AS field1 FROM v1 AS alias1 WHERE alias1.col_varchar_key < 'v' )"; execute stmt; col_int_nokey col_int_key col_varchar_key 1 7 v 2 2 i 4 9 l 7 0 s execute stmt; col_int_nokey col_int_key col_varchar_key 1 7 v 2 2 i 4 9 l 7 0 s DEALLOCATE PREPARE stmt; DROP VIEW v1; DROP TABLE t1; # End of test for bug#13773979. # # BUG#13685026 ASSERTION CUR_SJ_INNER_TABLES == 0 IN # --OPTIMIZE_TABLE_ORDER::CHOOSE_TABLE_ORDER # CREATE TABLE t1 ( col_int_key INT(11) NOT NULL, col_datetime_key DATETIME NOT NULL, col_varchar_key VARCHAR(1) NOT NULL, col_varchar_nokey VARCHAR(1) NOT NULL, KEY col_int_key (col_int_key), KEY col_datetime_key (col_datetime_key), KEY col_varchar_key (col_varchar_key,col_int_key) ); INSERT INTO t1 VALUES (0,'2002-02-13 17:30:06','j','j'); INSERT INTO t1 VALUES (8,'2008-09-27 00:34:58','v','v'); CREATE TABLE t2 ( col_int_key INT(11) NOT NULL, col_datetime_key DATETIME NOT NULL, col_varchar_key VARCHAR(1) NOT NULL, col_varchar_nokey VARCHAR(1) NOT NULL, KEY col_int_key (col_int_key), KEY col_datetime_key (col_datetime_key), KEY col_varchar_key (col_varchar_key,col_int_key) ); INSERT INTO t2 VALUES (7,'2003-08-21 00:00:00','b','b'); SET @old_depth=@@optimizer_search_depth; SET optimizer_search_depth=4; EXPLAIN SELECT col_datetime_key FROM t1 as outr WHERE col_datetime_key IN ( SELECT alias1.col_datetime_key FROM t1 AS alias1 LEFT JOIN t1 as alias3 STRAIGHT_JOIN ( t2 AS alias4 JOIN t1 AS alias5 ON alias5.col_varchar_key <= alias4.col_varchar_nokey ) ON alias5.col_int_key < alias4.col_int_key ON alias5.col_varchar_key = alias4.col_varchar_key ); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE alias1 index NULL col_datetime_key 5 NULL 2 Using index; Start temporary 1 SIMPLE alias4 ALL col_int_key,col_varchar_key NULL NULL NULL 1 NULL 1 SIMPLE alias5 ref col_int_key,col_varchar_key col_varchar_key 3 test.alias4.col_varchar_key 1 Using where; Using index 1 SIMPLE alias3 index NULL col_int_key 4 NULL 2 Using index 1 SIMPLE outr index col_datetime_key col_datetime_key 5 NULL 2 Using where; Using index; End temporary; Using join buffer (Block Nested Loop) SELECT col_datetime_key FROM t1 as outr WHERE col_datetime_key IN ( SELECT alias1.col_datetime_key FROM t1 AS alias1 LEFT JOIN t1 as alias3 STRAIGHT_JOIN ( t2 AS alias4 JOIN t1 AS alias5 ON alias5.col_varchar_key <= alias4.col_varchar_nokey ) ON alias5.col_int_key < alias4.col_int_key ON alias5.col_varchar_key = alias4.col_varchar_key ); col_datetime_key 2002-02-13 17:30:06 2008-09-27 00:34:58 DROP TABLE t1,t2; SET @@optimizer_search_depth=@old_depth; # # BUG#13848789: SEGFAULT IN JOIN_READ_NEXT_SAME AT # SQL/SQL_EXECUTOR.CC ON HAVING...IN...JOIN # CREATE TABLE t1 ( col_int_key INT, col_varchar_key VARCHAR(1), KEY col_int_key (col_int_key), KEY col_varchar_key (col_varchar_key) ); INSERT INTO t1 VALUES (8,'x'); CREATE TABLE t2 ( col_varchar_key VARCHAR(1), KEY col_varchar_key (col_varchar_key) ); INSERT INTO t2 VALUES ('x'), ('y'); explain SELECT MIN(col_int_key) FROM t1 as t1_outer HAVING (1, 2) IN ( SELECT t1_inner.col_int_key, MAX(t1_inner.col_int_key) FROM t1 as t1_inner JOIN t2 ON t2.col_varchar_key = t1_inner.col_varchar_key ); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away 2 DEPENDENT SUBQUERY t1_inner system col_varchar_key NULL NULL NULL 1 NULL 2 DEPENDENT SUBQUERY t2 ref col_varchar_key col_varchar_key 4 const 1 Using index SELECT MIN(col_int_key) FROM t1 as t1_outer HAVING (1, 2) IN ( SELECT t1_inner.col_int_key, MAX(t1_inner.col_int_key) FROM t1 as t1_inner JOIN t2 ON t2.col_varchar_key = t1_inner.col_varchar_key ); MIN(col_int_key) DROP TABLE t1,t2; # Bug#13838810: Segfault in evaluate_null_complemented_join_record CREATE TABLE t1 ( pk int NOT NULL, col_int_nokey int DEFAULT NULL, col_int_key int DEFAULT NULL, col_varchar_key varchar(1) DEFAULT NULL, PRIMARY KEY (pk), KEY col_int_key (col_int_key), KEY col_varchar_key (col_varchar_key,col_int_key) ) ENGINE=InnoDB; INSERT INTO t1 VALUES (10,NULL,8,'x'); CREATE TABLE t2 ( pk int NOT NULL, col_varchar_nokey varchar(1) DEFAULT NULL, PRIMARY KEY (pk) ) ENGINE=InnoDB; INSERT INTO t2 VALUES (1,'x'); CREATE TABLE t3 ( pk int NOT NULL, col_varchar_key varchar(1) DEFAULT NULL, col_varchar_nokey varchar(1) DEFAULT NULL, PRIMARY KEY (pk), KEY col_varchar_key (col_varchar_key) ) ENGINE=InnoDB; INSERT INTO t3 VALUES (1,'v','v'), (2,'v','v'), (3,'c','c'), (4,NULL,NULL); EXPLAIN SELECT table1.pk,table2.pk, table3.pk FROM t2 AS table1 LEFT JOIN t1 AS table2 LEFT JOIN t1 AS table3 ON table3.col_int_key = table2.col_int_key ON table3.pk = table2.col_int_nokey AND table1.col_varchar_nokey IN ( SELECT subquery3_t1.col_varchar_nokey FROM t3 AS subquery3_t1 LEFT JOIN t1 AS subquery3_t2 ON subquery3_t2.col_varchar_key = subquery3_t1.col_varchar_key WHERE subquery3_t2.col_int_nokey <> 9 ) ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE table1 ALL NULL NULL NULL NULL 1 NULL 1 SIMPLE table2 ALL col_int_key NULL NULL NULL 1 Using where 1 SIMPLE table3 eq_ref PRIMARY,col_int_key PRIMARY 4 test.table2.col_int_nokey 1 Using where 1 SIMPLE subquery3_t2 ALL col_varchar_key NULL NULL NULL 1 Using where 1 SIMPLE subquery3_t1 ref col_varchar_key col_varchar_key 4 test.subquery3_t2.col_varchar_key 1 Using where; FirstMatch(table3) SELECT table1.pk,table2.pk, table3.pk FROM t2 AS table1 LEFT JOIN t1 AS table2 LEFT JOIN t1 AS table3 ON table3.col_int_key = table2.col_int_key ON table3.pk = table2.col_int_nokey AND table1.col_varchar_nokey IN ( SELECT subquery3_t1.col_varchar_nokey FROM t3 AS subquery3_t1 LEFT JOIN t1 AS subquery3_t2 ON subquery3_t2.col_varchar_key = subquery3_t1.col_varchar_key WHERE subquery3_t2.col_int_nokey <> 9 ) ; pk pk pk 1 NULL NULL DROP TABLE t1, t2, t3; Extra test case for specific code coverage CREATE TABLE t1(pk INTEGER); INSERT INTO t1 VALUES(1), (2); explain SELECT * FROM t1 AS ot1 LEFT JOIN t1 AS ot2 ON ot1.pk=ot2.pk AND ot2.pk IN (SELECT it1.pk FROM t1 AS it1 LEFT JOIN t1 AS it2 ON it1.pk=it2.pk); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot1 ALL NULL NULL NULL NULL 2 Start temporary 1 SIMPLE ot2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE it1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE it2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (Block Nested Loop) SELECT * FROM t1 AS ot1 LEFT JOIN t1 AS ot2 ON ot1.pk=ot2.pk AND ot2.pk IN (SELECT it1.pk FROM t1 AS it1 LEFT JOIN t1 AS it2 ON it1.pk=it2.pk); pk pk 1 1 2 2 DROP TABLE t1; # End of test for bug#13838810. # # BUG#13685026 ASSERTION CUR_SJ_INNER_TABLES == 0 IN # --OPTIMIZE_TABLE_ORDER::CHOOSE_TABLE_ORDER # CREATE TABLE t1 ( col_int_key INT(11) NOT NULL, col_datetime_key DATETIME NOT NULL, col_varchar_key VARCHAR(1) NOT NULL, col_varchar_nokey VARCHAR(1) NOT NULL, KEY col_int_key (col_int_key), KEY col_datetime_key (col_datetime_key), KEY col_varchar_key (col_varchar_key,col_int_key) ); INSERT INTO t1 VALUES (0,'2002-02-13 17:30:06','j','j'); INSERT INTO t1 VALUES (8,'2008-09-27 00:34:58','v','v'); CREATE TABLE t2 ( col_int_key INT(11) NOT NULL, col_datetime_key DATETIME NOT NULL, col_varchar_key VARCHAR(1) NOT NULL, col_varchar_nokey VARCHAR(1) NOT NULL, KEY col_int_key (col_int_key), KEY col_datetime_key (col_datetime_key), KEY col_varchar_key (col_varchar_key,col_int_key) ); INSERT INTO t2 VALUES (7,'2003-08-21 00:00:00','b','b'); SET @old_depth=@@optimizer_search_depth; SET optimizer_search_depth=4; EXPLAIN SELECT col_datetime_key FROM t1 as outr WHERE col_datetime_key IN ( SELECT alias1.col_datetime_key FROM t1 AS alias1 LEFT JOIN t1 as alias3 STRAIGHT_JOIN ( t2 AS alias4 JOIN t1 AS alias5 ON alias5.col_varchar_key <= alias4.col_varchar_nokey ) ON alias5.col_int_key < alias4.col_int_key ON alias5.col_varchar_key = alias4.col_varchar_key ); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE alias1 index NULL col_datetime_key 5 NULL 2 Using index; Start temporary 1 SIMPLE alias4 ALL col_int_key,col_varchar_key NULL NULL NULL 1 NULL 1 SIMPLE alias5 ref col_int_key,col_varchar_key col_varchar_key 3 test.alias4.col_varchar_key 1 Using where; Using index 1 SIMPLE alias3 index NULL col_int_key 4 NULL 2 Using index 1 SIMPLE outr index col_datetime_key col_datetime_key 5 NULL 2 Using where; Using index; End temporary; Using join buffer (Block Nested Loop) SELECT col_datetime_key FROM t1 as outr WHERE col_datetime_key IN ( SELECT alias1.col_datetime_key FROM t1 AS alias1 LEFT JOIN t1 as alias3 STRAIGHT_JOIN ( t2 AS alias4 JOIN t1 AS alias5 ON alias5.col_varchar_key <= alias4.col_varchar_nokey ) ON alias5.col_int_key < alias4.col_int_key ON alias5.col_varchar_key = alias4.col_varchar_key ); col_datetime_key 2002-02-13 17:30:06 2008-09-27 00:34:58 DROP TABLE t1,t2; SET @@optimizer_search_depth=@old_depth; # # Bug#13845930: Segfault in st_join_table::and_with_condition # CREATE TABLE t1 ( col_int INTEGER ); CREATE TABLE t2 ( col_varchar_1 VARCHAR(1), col_varchar_2 VARCHAR(1) ); INSERT INTO t2 VALUES ('x','x'), ('c','c'); PREPARE stmt FROM ' SELECT alias2.col_varchar_2 AS field1 FROM t2 AS alias1 JOIN (t2 AS alias2 LEFT JOIN t2 AS alias3 ON (8, 92) IN (SELECT sq1_alias1.col_int, sq1_alias2.col_int FROM t1 AS sq1_alias1 JOIN t1 AS sq1_alias2 ) ) ON alias3.col_varchar_1 = alias2.col_varchar_2 '; EXECUTE stmt; field1 EXECUTE stmt; field1 DEALLOCATE prepare stmt; DROP TABLE t1, t2; # End of test for bug#13845930. # # Bug#13855925: Assert 'prebuilt->search_tuple->n_fields > 0' # in ha_innobase::index_read # CREATE TABLE t1 ( pk INTEGER AUTO_INCREMENT, col_int_nokey INT, col_int_key INT, col_varchar_key VARCHAR(1), col_varchar_nokey VARCHAR(1), PRIMARY KEY (pk), KEY (col_varchar_key) ) ENGINE=INNODB; INSERT INTO t1 ( col_int_key, col_int_nokey, col_varchar_key, col_varchar_nokey ) VALUES (4, 2, 'v','v'), (62, 150, 'v','v'), (7, NULL, 'c','c'), (1, 2, NULL, NULL), (0, 5, 'x','x'), (7, 3, 'i','i'), (7, 1, 'e','e'), (1, 4, 'p','p'), (7, NULL, 's','s'), (1, 2, 'j','j'), (5, 6, 'z','z'), (2, 6, 'c','c'), (0, 8, 'a','a'), (1, 2, 'q','q'), (8, 6, 'y','y'), (1, 8, NULL, NULL), (1, 3, 'r','r'), (9, 3, 'v','v'), (1, 9, NULL, NULL), (5, 6, 'r','r'); CREATE TABLE t2 ( pk INT AUTO_INCREMENT, col_int_nokey INT, col_int_key INT, PRIMARY KEY (pk), KEY (col_int_key) ) AUTO_INCREMENT=10 ENGINE=INNODB; INSERT INTO t2 (col_int_key, col_int_nokey) VALUES (8, NULL), (7, 8), (1, 1), (7, 9), (9, 4), (NULL, 3), (1, 2), (9, NULL), (2, 2), (9, NULL), (2, 6), (4, 7), (0, 2), (4, 5), (8, 7), (NULL, 6), (NULL, 6), (0, 2), (NULL, 9), (8, 6); CREATE TABLE t3 ( pk INT AUTO_INCREMENT, col_varchar_key VARCHAR(1), PRIMARY KEY (pk), KEY (col_varchar_key) ) ENGINE=INNODB; INSERT INTO t3 (col_varchar_key) VALUES ('c'), ('c'), ('q'), ('g'), ('e'), ('l'), (NULL), ('c'), ('h'), ('d'), ('c'), ('i'), ('t'), ('g'), ('q'), ('l'), ('n'), ('z'), ('n'), ('r'), ('p'); CREATE VIEW v1 AS SELECT table2.col_varchar_nokey AS field1 FROM t2 AS table1 INNER JOIN (t1 AS table2 STRAIGHT_JOIN t2 AS table3 ON table3.col_int_key = table2.pk AND table3.col_int_nokey = ANY (SELECT subquery1_t2.col_int_nokey AS subquery1_field1 FROM t2 AS subquery1_t1 RIGHT OUTER JOIN t1 AS subquery1_t2 INNER JOIN t1 AS subquery1_t3 ON subquery1_t3.col_int_key = subquery1_t2.pk ON subquery1_t3.col_varchar_key=subquery1_t2.col_varchar_nokey WHERE subquery1_t1.pk > 1 ) ) ON table3.col_int_key IN (SELECT subquery2_t1.col_int_key AS subquery2_field1 FROM t2 AS subquery2_t1 RIGHT OUTER JOIN t3 AS subquery2_t2 LEFT OUTER JOIN t1 AS subquery2_t3 ON subquery2_t3.col_varchar_key = subquery2_t2.col_varchar_key ON subquery2_t3.pk = subquery2_t2.pk ) ; explain SELECT * FROM v1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE table1 index NULL col_int_key 5 NULL 20 Using index; Start temporary 1 SIMPLE subquery1_t3 ALL col_varchar_key NULL NULL NULL 20 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE subquery1_t2 eq_ref PRIMARY PRIMARY 4 test.subquery1_t3.col_int_key 1 Using where 1 SIMPLE subquery1_t1 index PRIMARY col_int_key 5 NULL 20 Using where; Using index; Using join buffer (Block Nested Loop) 1 SIMPLE table2 ALL PRIMARY NULL NULL NULL 20 Using join buffer (Block Nested Loop) 1 SIMPLE table3 ref col_int_key col_int_key 5 test.table2.pk 1 Using where; End temporary 1 SIMPLE subquery2_t1 ref col_int_key col_int_key 5 test.table2.pk 1 Using index 1 SIMPLE subquery2_t3 index PRIMARY,col_varchar_key col_varchar_key 4 NULL 20 Using where; Using index 1 SIMPLE subquery2_t2 eq_ref PRIMARY,col_varchar_key PRIMARY 4 test.subquery2_t3.pk 1 Using where; FirstMatch(table3) SELECT * FROM v1; field1 v v v v v v v v v v v v v v v v v v v v DROP VIEW v1; DROP TABLE t1,t2,t3; # End of test for bug#13855925. # # Bug#13897959: Segfault in setup_semijoin_dups_elimination() # CREATE TABLE t1 ( col_datetime_key DATETIME DEFAULT NULL, KEY col_datetime_key (col_datetime_key) ) ENGINE=MyISAM; INSERT INTO t1 VALUES ('2001-04-18 00:00:00'), ('2008-12-18 19:39:55'), ('2000-08-01 12:19:39'), ('2004-09-25 21:29:06'), ('2009-09-20 09:11:48'), ('2004-03-27 09:32:04'); CREATE TABLE t2 ( col_date_nokey date DEFAULT NULL, col_time_key time DEFAULT NULL, col_datetime_key datetime DEFAULT NULL, col_varchar_key varchar(1) DEFAULT NULL, col_varchar_nokey varchar(1) DEFAULT NULL, KEY col_time_key (col_time_key), KEY col_datetime_key (col_datetime_key), KEY col_varchar_key(col_varchar_key) ) ENGINE=MyISAM; INSERT INTO t2 VALUES ('1900-01-01',NULL,'2001-11-04 19:07:55','x','x'); SELECT grandparent1.col_varchar_nokey FROM t2 AS grandparent1 LEFT JOIN t1 USING (col_datetime_key) WHERE grandparent1.col_varchar_nokey IN ( SELECT col_varchar_nokey FROM t2 AS parent1 WHERE parent1.col_time_key > grandparent1.col_date_nokey ); col_varchar_nokey DROP TABLE t1, t2; # End of test for bug#13897959. # # Bug#13898625 ASSERT `(REMAINING_TABLES_AFTER != 0) ...' IN # BEST_EXTENSION_BY_LIMITED_SEARCH # CREATE TABLE t1 ( pk int(11) NOT NULL, col_int_nokey INT, col_int_key INT, col_varchar_key VARCHAR(1), col_varchar_nokey VARCHAR(1), PRIMARY KEY (pk), KEY col_int_key (col_int_key), KEY col_varchar_key (col_varchar_key,col_int_key) ); INSERT INTO t1 VALUES (26,6,NULL,'f','f'); INSERT INTO t1 VALUES (29,6,8,'c','c'); CREATE TABLE t2 ( pk INT NOT NULL, col_int_nokey INT, col_int_key INT, col_varchar_key VARCHAR(1), col_varchar_nokey VARCHAR(1), PRIMARY KEY (pk), KEY col_int_key (col_int_key), KEY col_varchar_key (col_varchar_key,col_int_key) ); INSERT INTO t2 VALUES (1,2,4,'v','v'); INSERT INTO t2 VALUES (2,150,62,'v','v'); INSERT INTO t2 VALUES (5,5,0,'x','x'); INSERT INTO t2 VALUES (6,3,7,'i','i'); INSERT INTO t2 VALUES (7,1,7,'e','e'); CREATE VIEW view_c AS SELECT * FROM t2; PREPARE prep_stmt_7430 FROM 'SELECT SUM( alias1.col_varchar_key ) AS field1 FROM t1 AS alias1 RIGHT JOIN t2 AS alias2 INNER JOIN t1 AS alias3 ON (alias3.col_varchar_key = alias2.col_varchar_key ) ON ( "v" ) IN ( SELECT sq1_alias1.col_varchar_nokey AS sq1_field1 FROM t1 AS sq1_alias1 ) WHERE alias3.pk IN ( SELECT sq2_alias1.col_int_key AS sq2_field1 FROM ( view_c AS sq2_alias1, t1 AS sq2_alias2 ) ) '; EXECUTE prep_stmt_7430; field1 NULL EXECUTE prep_stmt_7430; field1 NULL EXPLAIN SELECT SUM( alias1.col_varchar_key ) AS field1 FROM t1 AS alias1 RIGHT JOIN t2 AS alias2 INNER JOIN t1 AS alias3 ON (alias3.col_varchar_key = alias2.col_varchar_key ) ON ( "v" ) IN ( SELECT sq1_alias1.col_varchar_nokey AS sq1_field1 FROM t1 AS sq1_alias1 ) WHERE alias3.pk IN ( SELECT sq2_alias1.col_int_key AS sq2_field1 FROM ( view_c AS sq2_alias1, t1 AS sq2_alias2 ) ) ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE alias3 ALL PRIMARY,col_varchar_key NULL NULL NULL 2 Using where 1 SIMPLE sq2_alias2 index NULL PRIMARY 4 NULL 2 Using index 1 SIMPLE t2 ref col_int_key col_int_key 5 test.alias3.pk 2 Using index; FirstMatch(alias3) 1 SIMPLE alias2 ref col_varchar_key col_varchar_key 4 test.alias3.col_varchar_key 1 Using index 1 SIMPLE sq1_alias1 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(alias2) 1 SIMPLE alias1 index NULL col_varchar_key 9 NULL 2 Using index PREPARE prep_stmt_7430 FROM 'SELECT SUM( alias1.col_varchar_key ) AS field1 FROM t1 AS alias1 RIGHT JOIN t2 AS alias2 INNER JOIN t1 AS alias3 ON (alias3.col_varchar_key = alias2.col_varchar_key ) ON ( "v" ) IN ( SELECT sq1_alias1.col_varchar_nokey AS sq1_field1 FROM t1 AS sq1_alias1 ) WHERE alias3.pk IN ( SELECT sq2_alias1.col_int_key AS sq2_field1 FROM ( view_c AS sq2_alias1 , t1 AS sq2_alias2 ) WHERE sq2_alias1.col_varchar_nokey <> alias2.col_varchar_key AND sq2_alias1.col_varchar_key < "l" ) '; EXECUTE prep_stmt_7430; field1 NULL EXECUTE prep_stmt_7430; field1 NULL EXPLAIN SELECT SUM( alias1.col_varchar_key ) AS field1 FROM t1 AS alias1 RIGHT JOIN t2 AS alias2 INNER JOIN t1 AS alias3 ON (alias3.col_varchar_key = alias2.col_varchar_key ) ON ( "v" ) IN ( SELECT sq1_alias1.col_varchar_nokey AS sq1_field1 FROM t1 AS sq1_alias1 ) WHERE alias3.pk IN ( SELECT sq2_alias1.col_int_key AS sq2_field1 FROM ( view_c AS sq2_alias1 , t1 AS sq2_alias2 ) WHERE sq2_alias1.col_varchar_nokey <> alias2.col_varchar_key AND sq2_alias1.col_varchar_key < "l" ) ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 range col_int_key,col_varchar_key col_varchar_key 4 NULL 2 Using where; Start temporary 1 SIMPLE alias3 eq_ref PRIMARY,col_varchar_key PRIMARY 4 test.t2.col_int_key 1 Using where 1 SIMPLE alias2 ref col_varchar_key col_varchar_key 4 test.alias3.col_varchar_key 1 Using index 1 SIMPLE sq2_alias2 index NULL PRIMARY 4 NULL 2 Using index; End temporary; Using join buffer (Block Nested Loop) 1 SIMPLE sq1_alias1 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(sq2_alias2) 1 SIMPLE alias1 index NULL col_varchar_key 9 NULL 2 Using index DROP TABLE t1,t2; DROP VIEW view_c; # # Bug#13902463 SEGFAULT IN BITMAP<64U>::MERGE OR ADD_KEY_FIELD # ON SECOND EXEC OF PREP STMT # CREATE TABLE t1 ( pk INT, col_int_nokey INT, col_int_key INT, col_varchar_key VARCHAR(1), col_varchar_nokey VARCHAR(1), KEY col_varchar_key (col_varchar_key) ); CREATE VIEW view_b AS SELECT * FROM t1; PREPARE prep_stmt_20421 FROM 'SELECT alias2.col_varchar_nokey AS field1 FROM t1 AS alias1 INNER JOIN t1 AS alias2 ON (alias1.col_varchar_key = alias2.col_varchar_nokey AND ( alias1.col_int_key ) IN ( SELECT t1.col_int_nokey FROM t1 ) ) WHERE alias1.col_varchar_key IN ( SELECT sq2_alias2.col_varchar_nokey AS sq2_field1 FROM view_b AS sq2_alias1 INNER JOIN t1 AS sq2_alias2 ON (sq2_alias2.col_varchar_key = sq2_alias1.col_varchar_key ) WHERE sq2_alias1.pk > alias2.pk ) '; EXECUTE prep_stmt_20421; field1 EXECUTE prep_stmt_20421; field1 EXPLAIN SELECT alias2.col_varchar_nokey AS field1 FROM t1 AS alias1 INNER JOIN t1 AS alias2 ON (alias1.col_varchar_key = alias2.col_varchar_nokey AND ( alias1.col_int_key ) IN ( SELECT t1.col_int_nokey FROM t1 ) ) WHERE alias1.col_varchar_key IN ( SELECT sq2_alias2.col_varchar_nokey AS sq2_field1 FROM view_b AS sq2_alias1 INNER JOIN t1 AS sq2_alias2 ON (sq2_alias2.col_varchar_key = sq2_alias1.col_varchar_key ) WHERE sq2_alias1.pk > alias2.pk ) ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables ALTER TABLE t1 DROP INDEX col_varchar_key; PREPARE prep_stmt_20421 FROM 'SELECT alias2.col_varchar_nokey AS field1 FROM t1 AS alias1 INNER JOIN t1 AS alias2 ON (alias1.col_varchar_key = alias2.col_varchar_nokey AND ( alias1.col_int_key ) IN ( SELECT t1.col_int_nokey FROM t1 ) ) WHERE alias1.col_varchar_key IN ( SELECT sq2_alias2.col_varchar_nokey AS sq2_field1 FROM view_b AS sq2_alias1 INNER JOIN t1 AS sq2_alias2 ON (sq2_alias2.col_varchar_key = sq2_alias1.col_varchar_key ) WHERE sq2_alias1.pk > alias2.pk ) '; EXECUTE prep_stmt_20421; field1 EXECUTE prep_stmt_20421; field1 EXPLAIN SELECT alias2.col_varchar_nokey AS field1 FROM t1 AS alias1 INNER JOIN t1 AS alias2 ON (alias1.col_varchar_key = alias2.col_varchar_nokey AND ( alias1.col_int_key ) IN ( SELECT t1.col_int_nokey FROM t1 ) ) WHERE alias1.col_varchar_key IN ( SELECT sq2_alias2.col_varchar_nokey AS sq2_field1 FROM view_b AS sq2_alias1 INNER JOIN t1 AS sq2_alias2 ON (sq2_alias2.col_varchar_key = sq2_alias1.col_varchar_key ) WHERE sq2_alias1.pk > alias2.pk ) ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables DROP TABLE t1; DROP VIEW view_b; # # Bug#13907277: Segfault in evaluate_null_complemented_join_record # CREATE TABLE t1 ( pk INTEGER, col_varchar_nokey VARCHAR(1), col_varchar_key VARCHAR(1), PRIMARY KEY (pk) ); INSERT INTO t1 VALUES (1, 'x', 'x'); CREATE TABLE t2 ( pk INTEGER, PRIMARY KEY (pk) ); INSERT INTO t2 VALUES (1); CREATE TABLE t3 ( pk INTEGER, col_int_nokey INTEGER, col_int_key INTEGER, col_varchar_nokey VARCHAR(1), PRIMARY KEY (pk) ); INSERT INTO t3 VALUES (1, 6, 5, 'r'); explain SELECT outer_t1.pk, outer_t2.pk FROM t3 AS outer_t1 RIGHT JOIN t2 AS outer_t2 ON outer_t1.col_int_nokey IN (SELECT inner_t1.col_int_nokey FROM t3 AS inner_t1 LEFT JOIN t1 AS inner_t2 INNER JOIN t1 AS inner_t3 ON inner_t3.pk = inner_t2.pk ON inner_t3.col_varchar_nokey = inner_t2.col_varchar_key ); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE outer_t2 system NULL NULL NULL NULL 1 NULL 1 SIMPLE outer_t1 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE inner_t1 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE inner_t2 ALL PRIMARY NULL NULL NULL 1 NULL 1 SIMPLE inner_t3 eq_ref PRIMARY PRIMARY 4 test.inner_t2.pk 1 Using where; FirstMatch(outer_t1) SELECT outer_t1.pk, outer_t2.pk FROM t3 AS outer_t1 RIGHT JOIN t2 AS outer_t2 ON outer_t1.col_int_nokey IN (SELECT inner_t1.col_int_nokey FROM t3 AS inner_t1 LEFT JOIN t1 AS inner_t2 INNER JOIN t1 AS inner_t3 ON inner_t3.pk = inner_t2.pk ON inner_t3.col_varchar_nokey = inner_t2.col_varchar_key ); pk pk 1 1 DROP TABLE t1, t2, t3; # End of test for bug#13907277. # # Bug#13955713: Assert 'JOIN->best_read < ...' on second execution # CREATE TABLE t1 ( pk INTEGER, col_varchar_key VARCHAR(1), col_varchar_nokey VARCHAR(1) ); PREPARE stmt FROM " SELECT MIN(alias2.col_varchar_key) AS field1 FROM t1 AS alias1 INNER JOIN (t1 AS alias2 INNER JOIN t1 AS alias3 ON 8 IN (SELECT sq1_alias1.pk AS sq1_field2 FROM t1 AS sq1_alias1 WHERE 9 IN (SELECT SUM(t1_sq1_alias1.pk) AS t1_sq1_field2 FROM t1 AS t1_sq1_alias1 ) ) ) ON alias3.col_varchar_nokey = alias2.col_varchar_key WHERE EXISTS (SELECT sq2_alias1.pk AS sq2_field1 FROM t1 AS sq2_alias1 WHERE sq2_alias1.col_varchar_key < alias1.col_varchar_nokey ) "; EXECUTE stmt; field1 NULL EXECUTE stmt; field1 NULL DEALLOCATE PREPARE stmt; DROP TABLE t1; # End of test for bug#13955713. # # Bug#13956813: Segfault in memcpy from Join_cache::write_record_data() # CREATE TABLE t1 ( pk INT, col_varchar_key VARCHAR(1), col_varchar_nokey VARCHAR(1) ); CREATE TABLE t2 ( pk INT, col_varchar_key VARCHAR(1), col_varchar_nokey VARCHAR(1) ); INSERT INTO t2 VALUES (10,'j','j'), (11,'z','z'), (12,'c','c'), (13,'a','a'), (14,'q','q'), (15,'y','y'), (16,NULL,NULL), (17,'r','r'), (18,'v','v'), (19,NULL,NULL), (20,'r','r'); CREATE TABLE t3 ( pk INT, col_int_key INT, col_varchar_key VARCHAR(1), KEY col_int_key (col_int_key) ); INSERT INTO t3 VALUES (15,NULL,'u'), (16,1,'m'), (17,9,NULL), (18,2,'o'), (19,9,'w'), (20,2,'m'), (21,4,'q'), (22,0,NULL), (23,4,'d'), (24,8,'g'), (25,NULL,'x'), (26,NULL,'f'), (27,0,'p'), (28,NULL,'j'), (29,8,'c'); CREATE VIEW view_inline_0 AS SELECT t1.* FROM t1 INNER JOIN t3 ON t1.pk = t3.pk; CREATE VIEW view_inline_1 AS SELECT sq2_alias2.col_varchar_key AS sq2_field1, sq2_alias1.col_varchar_key AS sq2_field2 FROM t3 AS sq2_alias1 LEFT OUTER JOIN t3 AS sq2_alias2 ON sq2_alias1.pk = sq2_alias2.col_int_key; CREATE VIEW view_inline_2 AS SELECT 'p', 'p' UNION SELECT 'k', 's'; explain SELECT SUM(alias1.col_varchar_nokey) AS field2 FROM t2 AS alias2 LEFT JOIN (SELECT * FROM view_inline_0) AS alias1 ON alias2.col_varchar_key = alias1.col_varchar_key AND (alias2.col_varchar_nokey, alias2.col_varchar_key) IN (SELECT * FROM view_inline_1 ) WHERE (alias1.col_varchar_key, alias1.col_varchar_nokey) IN (SELECT * FROM view_inline_2 ); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY alias2 ALL NULL NULL NULL NULL 11 NULL 1 PRIMARY sq2_alias1 ALL NULL NULL NULL NULL 15 Using where 1 PRIMARY sq2_alias2 ref col_int_key col_int_key 5 test.sq2_alias1.pk 2 Using where; FirstMatch(alias2) 1 PRIMARY <derived2> ref <auto_key0> <auto_key0> 4 test.alias2.col_varchar_key 2 NULL 1 PRIMARY <derived7> ALL NULL NULL NULL NULL 2 Using where; FirstMatch(<derived2>); Using join buffer (Block Nested Loop) 7 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used 8 UNION NULL NULL NULL NULL NULL NULL NULL No tables used NULL UNION RESULT <union7,8> ALL NULL NULL NULL NULL NULL Using temporary 2 DERIVED NULL NULL NULL NULL NULL NULL NULL no matching row in const table SELECT SUM(alias1.col_varchar_nokey) AS field2 FROM t2 AS alias2 LEFT JOIN (SELECT * FROM view_inline_0) AS alias1 ON alias2.col_varchar_key = alias1.col_varchar_key AND (alias2.col_varchar_nokey, alias2.col_varchar_key) IN (SELECT * FROM view_inline_1 ) WHERE (alias1.col_varchar_key, alias1.col_varchar_nokey) IN (SELECT * FROM view_inline_2 ); field2 NULL DROP VIEW view_inline_0, view_inline_1, view_inline_2; DROP TABLE t1, t2, t3; # End of test for bug#13956813. # # Bug#13974177: Assert !(tab->table->regginfo.not_exists_optimize... # CREATE TABLE t1 ( pk INTEGER AUTO_INCREMENT, col_int_nokey INTEGER, col_int_key INTEGER, col_varchar_key VARCHAR(1), col_varchar_nokey VARCHAR(1), PRIMARY KEY (pk), KEY (col_int_key), KEY (col_varchar_key, col_int_key) ); INSERT INTO t1(col_int_key, col_int_nokey, col_varchar_key, col_varchar_nokey) VALUES (0, 4, 'j', 'j'), (8, 6, 'v', 'v'), (1, 3, 'c', 'c'), (8, 5, 'm', 'm'), (9, 3, 'd', 'd'), (24, 246, 'd', 'd'), (6, 2, 'y', 'y'), (1, 9, 't', 't'), (6, 3, 'd', 'd'), (2, 8, 's', 's'), (4, 1, 'r', 'r'), (8, 8, 'm', 'm'), (4, 8, 'b', 'b'), (4, 5, 'x', 'x'), (7, 7, 'g', 'g'), (4, 5, 'p', 'p'), (1, 1, 'q', 'q'), (9, 6, 'w', 'w'), (4, 2, 'd', 'd'), (8, 9, 'e', 'e'); CREATE TABLE t2 ( pk INTEGER AUTO_INCREMENT, col_int_nokey INTEGER NOT NULL, col_time_key TIME NOT NULL, col_time_nokey TIME NOT NULL, PRIMARY KEY (pk), KEY (col_time_key) ) ENGINE=InnoDB; INSERT INTO t2 (col_int_nokey, col_time_key, col_time_nokey) VALUES (7, '00:00:00', '00:00:00'), (0, '00:00:00', '00:00:00'), (9, '06:35:17', '06:35:17'), (3, '18:07:14', '18:07:14'), (4, '20:36:52', '20:36:52'), (2, '21:29:07', '21:29:07'), (5, '23:45:57', '23:45:57'), (3, '22:54:57', '22:54:57'), (1, '18:45:09', '18:45:09'), (3, '14:30:46', '14:30:46'), (6, '19:23:43', '19:23:43'), (7, '03:39:30', '03:39:30'), (5, '23:37:52', '23:37:52'), (1, '16:59:30', '16:59:30'), (204, '22:21:15', '22:21:15'), (224, '12:24:37', '12:24:37'), (9, '15:02:08', '15:02:08'), (5, '23:59:59', '23:59:59'), (0, '08:23:30', '08:23:30'), (3, '08:32:22', '08:32:22'); explain SELECT ot1.col_int_key AS x FROM t1 AS ot2 LEFT JOIN t1 AS ot1 ON ot2.col_varchar_nokey > ot1.col_varchar_key WHERE (ot1.col_int_nokey, ot1.pk) IN (SELECT it1.pk AS x, it1.col_int_nokey AS y FROM t2 AS it2 LEFT JOIN t2 AS it1 ON it2.col_time_nokey = it1.col_time_key ) AND ot1.pk IS NULL ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot1 const PRIMARY,col_varchar_key PRIMARY 4 const 1 Using where 1 SIMPLE it1 eq_ref PRIMARY,col_time_key PRIMARY 4 test.ot1.col_int_nokey 1 Using where 1 SIMPLE it2 ALL NULL NULL NULL NULL 20 Using where; FirstMatch(it1); Using join buffer (Block Nested Loop) 1 SIMPLE ot2 ALL NULL NULL NULL NULL 20 Using where; Using join buffer (Block Nested Loop) SELECT ot1.col_int_key AS x FROM t1 AS ot2 LEFT JOIN t1 AS ot1 ON ot2.col_varchar_nokey > ot1.col_varchar_key WHERE (ot1.col_int_nokey, ot1.pk) IN (SELECT it1.pk AS x, it1.col_int_nokey AS y FROM t2 AS it2 LEFT JOIN t2 AS it1 ON it2.col_time_nokey = it1.col_time_key ) AND ot1.pk IS NULL ; x DROP TABLE t1, t2; # End of test for bug#13974177. # # Bug#13971022: Assert 'keyparts > 0' failed in create_ref_for_key... # CREATE TABLE t1 ( pk INT, col_int_key INT, col_varchar_key VARCHAR(1), PRIMARY KEY (pk), KEY col_varchar_key (col_varchar_key,col_int_key) ); CREATE TABLE t2 ( pk INT, col_int_key INT, col_varchar_key VARCHAR(1), col_varchar_nokey VARCHAR(1), PRIMARY KEY (pk) ) ENGINE=InnoDB; CREATE TABLE t3 ( i INT ); explain SELECT table1.pk AS field1 FROM ( SELECT subquery1_t1. * FROM t2 AS subquery1_t1 JOIN t2 AS subquery1_t2 ON subquery1_t2.pk = subquery1_t1.pk) AS table1 STRAIGHT_JOIN t2 AS table2 ON table1.col_int_key IN (SELECT 7 FROM t3) WHERE table1.col_varchar_nokey IN (SELECT subquery3_t1.col_varchar_key AS subquery3_field1 FROM t1 AS subquery3_t1 ) ; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ref <auto_key0> <auto_key0> 5 const 1 Using where 1 PRIMARY subquery3_t1 ref col_varchar_key col_varchar_key 4 table1.col_varchar_nokey 0 Using index; FirstMatch(<derived2>) 1 PRIMARY t3 ALL NULL NULL NULL NULL 0 FirstMatch(subquery3_t1); Using join buffer (Block Nested Loop) 1 PRIMARY table2 index NULL PRIMARY 4 NULL 1 Using index; Using join buffer (Block Nested Loop) 2 DERIVED subquery1_t1 ALL PRIMARY NULL NULL NULL 1 NULL 2 DERIVED subquery1_t2 eq_ref PRIMARY PRIMARY 4 test.subquery1_t1.pk 1 Using index SELECT table1.pk AS field1 FROM ( SELECT subquery1_t1. * FROM t2 AS subquery1_t1 JOIN t2 AS subquery1_t2 ON subquery1_t2.pk = subquery1_t1.pk) AS table1 STRAIGHT_JOIN t2 AS table2 ON table1.col_int_key IN (SELECT 7 FROM t3) WHERE table1.col_varchar_nokey IN (SELECT subquery3_t1.col_varchar_key AS subquery3_field1 FROM t1 AS subquery3_t1 ) ; field1 DROP TABLE t1, t2, t3; # End of test for bug#13971022. # # Bug#13623473 "MISSING ROWS ON SELECT AND JOIN WITH # TIME/DATETIME COMPARE" - Subquery part of test. # SET TIMESTAMP=UNIX_TIMESTAMP('2012-01-31 10:14:35'); CREATE TABLE t1 ( pk INT NOT NULL, col_int_nokey INT, col_int_key INT NOT NULL, PRIMARY KEY (pk), KEY col_int_key (col_int_key) ) ENGINE=InnoDB; INSERT INTO t1 VALUES (10,1,7), (11,7,0), (12,4,9), (13,7,3), (14,0,4), (15,2,2), (16,9,5), (17,4,3), (18,0,1), (19,9,3), (20,1,6), (21,3,7), (22,8,5), (23,8,1), (24,18,204), (25,84,224), (26,6,9), (27,3,5), (28,6,0), (29,6,3); CREATE TABLE t2 ( col_int_nokey INT NOT NULL, col_datetime_key DATETIME NOT NULL, col_varchar_key VARCHAR(1) NOT NULL, KEY col_datetime_key (col_datetime_key), KEY col_varchar_key (col_varchar_key) ) ENGINE=InnoDB; INSERT INTO t2 VALUES (1,'2001-11-04 19:07:55','k'); CREATE TABLE t3 ( col_time_key TIME, KEY col_time_key (col_time_key) ) ENGINE=InnoDB; INSERT INTO t3 VALUES ('21:22:34'), ('10:50:38'), ('00:21:38'), ('04:08:02'), ('16:25:11'), ('10:14:58'), ('19:47:59'), ('11:14:24'), ('00:00:00'), ('00:00:00'), ('15:57:25'), ('07:05:51'), ('19:22:21'), ('03:53:16'), ('09:16:38'), ('15:37:26'), ('00:00:00'), ('05:03:03'), ('02:59:24'), ('00:01:58'); EXPLAIN EXTENDED SELECT outr.col_int_nokey FROM t2 as outr STRAIGHT_JOIN t3 AS outr2 ON outr2.col_time_key > outr.col_datetime_key WHERE outr.col_int_nokey IN ( SELECT col_int_key FROM t1 AS innr WHERE innr.pk >= innr.col_int_nokey ) AND ( outr.col_int_nokey <= 6 OR outr.col_varchar_key IS NULL ); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE outr ALL col_datetime_key NULL NULL NULL 1 100.00 Using where 1 SIMPLE innr ref col_int_key col_int_key 4 test.outr.col_int_nokey 1 100.00 Using where; FirstMatch(outr) 1 SIMPLE outr2 ALL col_time_key NULL NULL NULL 20 100.00 Range checked for each record (index map: 0x1) Warnings: Note 1003 /* select#1 */ select `test`.`outr`.`col_int_nokey` AS `col_int_nokey` from `test`.`t2` `outr` semi join (`test`.`t1` `innr`) straight_join `test`.`t3` `outr2` where ((`test`.`innr`.`col_int_key` = `test`.`outr`.`col_int_nokey`) and (`test`.`outr`.`col_int_nokey` <= 6) and (`test`.`innr`.`pk` >= `test`.`innr`.`col_int_nokey`) and (`test`.`outr2`.`col_time_key` > `test`.`outr`.`col_datetime_key`)) SELECT outr.col_int_nokey FROM t2 as outr STRAIGHT_JOIN t3 AS outr2 ON outr2.col_time_key > outr.col_datetime_key WHERE outr.col_int_nokey IN ( SELECT col_int_key FROM t1 AS innr WHERE innr.pk >= innr.col_int_nokey ) AND ( outr.col_int_nokey <= 6 OR outr.col_varchar_key IS NULL ); col_int_nokey 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 DROP TABLE t1,t2,t3; SET TIMESTAMP = DEFAULT; # End of test for bug#13623473. # # Bug#13980954: Missing data on left join + null value + where..in # CREATE TABLE t1 ( ik INT, vc varchar(1) ); INSERT INTO t1 VALUES (8, 'x'), (NULL, 'x'); CREATE TABLE t2 ( ik INT, vc varchar(1) ); INSERT INTO t2 VALUES (0, 'x'), (7, 'i'), (7, 'e'), (1, 'p'), (7, 's'), (1, 'j'); explain format=json SELECT t2.vc, t2.ik AS t2_ik, t1.ik AS t1_ik FROM t2 LEFT JOIN t1 ON t2.vc=t1.vc WHERE t2.vc IN (SELECT vc FROM t2 AS t3); EXPLAIN { "query_block": { "select_id": 1, "nested_loop": [ { "table": { "table_name": "t2", "access_type": "ALL", "rows": 6, "filtered": 100 } }, { "table": { "table_name": "t3", "access_type": "ALL", "rows": 6, "filtered": 100, "first_match": "t2", "using_join_buffer": "Block Nested Loop", "attached_condition": "(`test`.`t3`.`vc` = `test`.`t2`.`vc`)" } }, { "table": { "table_name": "t1", "access_type": "ALL", "rows": 2, "filtered": 100, "using_join_buffer": "Block Nested Loop", "attached_condition": "<if>(is_not_null_compl(t1), (`test`.`t1`.`vc` = `test`.`t2`.`vc`), true)" } } ] } } Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`vc` AS `vc`,`test`.`t2`.`ik` AS `t2_ik`,`test`.`t1`.`ik` AS `t1_ik` from `test`.`t2` semi join (`test`.`t2` `t3`) left join `test`.`t1` on((`test`.`t1`.`vc` = `test`.`t2`.`vc`)) where (`test`.`t3`.`vc` = `test`.`t2`.`vc`) SELECT t2.vc, t2.ik AS t2_ik, t1.ik AS t1_ik FROM t2 LEFT JOIN t1 ON t2.vc=t1.vc WHERE t2.vc IN (SELECT vc FROM t2 AS t3); vc t2_ik t1_ik x 0 8 x 0 NULL i 7 NULL e 7 NULL p 1 NULL s 7 NULL j 1 NULL DROP TABLE t1, t2; # End of test for bug#13980954. # # Bug#14048292: Segfault in Item_field::result_type on 2nd execution # of prep stmt with join of view # CREATE TABLE t1 ( col_int INT ); INSERT INTO t1 VALUES (0), (1); CREATE VIEW view_t1 AS SELECT * FROM t1; explain SELECT alias1.col_int FROM t1 AS alias1 LEFT JOIN view_t1 AS alias2 ON alias1.col_int IN (SELECT sq1_alias1.col_int FROM t1 AS sq1_alias1 ); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE alias1 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE sq1_alias1 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(alias1) 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 NULL PREPARE stmt FROM "SELECT alias1.col_int FROM t1 AS alias1 LEFT JOIN view_t1 AS alias2 ON alias1.col_int IN (SELECT sq1_alias1.col_int FROM t1 AS sq1_alias1 )"; EXECUTE stmt; col_int 0 0 1 1 EXECUTE stmt; col_int 0 0 1 1 DEALLOCATE PREPARE stmt; DROP VIEW view_t1; DROP TABLE t1; # End of test for bug#14048292. # # Bug#14064201: Missing data on join of derived table + WHERE .. IN # with two operands # CREATE TABLE t1 ( col_varchar_nokey VARCHAR(1) ); INSERT INTO t1 VALUES ('v'), ('s'), ('l'), ('y'), ('c'), ('i'), ('h'), ('q'), ('a'), ('v'), ('u'), ('s'), ('y'), ('z'), ('h'), ('p'), ('e'), ('i'), ('y'), ('w'); CREATE TABLE t2 ( col_varchar_key VARCHAR(1), col_varchar_nokey VARCHAR(1), KEY col_varchar_key(col_varchar_key) ); INSERT INTO t2 VALUES ('j','j'), ('v','v'), ('c','c'), ('m','m'), ('d','d'), ('d','d'), ('y','y'); explain format=json SELECT * FROM (SELECT * FROM t2) AS derived1 LEFT JOIN t1 USING (col_varchar_nokey) WHERE (col_varchar_nokey, col_varchar_nokey) IN (SELECT col_varchar_nokey, col_varchar_key FROM t2 AS derived2 ); EXPLAIN { "query_block": { "select_id": 1, "nested_loop": [ { "table": { "table_name": "derived1", "access_type": "ALL", "rows": 7, "filtered": 100, "materialized_from_subquery": { "using_temporary_table": true, "dependent": false, "cacheable": true, "query_block": { "select_id": 2, "table": { "table_name": "t2", "access_type": "ALL", "rows": 7, "filtered": 100 } } } } }, { "table": { "table_name": "derived2", "access_type": "ALL", "possible_keys": [ "col_varchar_key" ], "rows": 7, "filtered": 85.714, "first_match": "derived1", "using_join_buffer": "Block Nested Loop", "attached_condition": "((`test`.`derived2`.`col_varchar_nokey` = `derived1`.`col_varchar_nokey`) and (`test`.`derived2`.`col_varchar_key` = `derived1`.`col_varchar_nokey`))" } }, { "table": { "table_name": "t1", "access_type": "ALL", "rows": 20, "filtered": 100, "using_join_buffer": "Block Nested Loop", "attached_condition": "<if>(is_not_null_compl(t1), (`test`.`t1`.`col_varchar_nokey` = `derived1`.`col_varchar_nokey`), true)" } } ] } } Warnings: Note 1003 /* select#1 */ select `derived1`.`col_varchar_nokey` AS `col_varchar_nokey`,`derived1`.`col_varchar_key` AS `col_varchar_key` from (/* select#2 */ select `test`.`t2`.`col_varchar_key` AS `col_varchar_key`,`test`.`t2`.`col_varchar_nokey` AS `col_varchar_nokey` from `test`.`t2`) `derived1` semi join (`test`.`t2` `derived2`) left join `test`.`t1` on((`test`.`t1`.`col_varchar_nokey` = `derived1`.`col_varchar_nokey`)) where ((`test`.`derived2`.`col_varchar_nokey` = `derived1`.`col_varchar_nokey`) and (`test`.`derived2`.`col_varchar_key` = `derived1`.`col_varchar_nokey`)) SELECT * FROM (SELECT * FROM t2) AS derived1 LEFT JOIN t1 USING (col_varchar_nokey) WHERE (col_varchar_nokey, col_varchar_nokey) IN (SELECT col_varchar_nokey, col_varchar_key FROM t2 AS derived2 ); col_varchar_nokey col_varchar_key v v y y c c v v y y y y j j m m d d d d DROP TABLE t1, t2; CREATE TABLE t1 ( col_int_nokey int NOT NULL, col_int_key int NOT NULL, KEY col_int_key (col_int_key) ); INSERT INTO t1 VALUES (1,7), (7,0), (4,9), (7,3), (0,4), (2,2), (9,5), (4,3), (0,1), (9,3), (1,6), (3,7), (8,5), (8,1), (18,204), (84,224), (6,9), (3,5), (6,0), (6,3); CREATE TABLE t2 ( col_int_nokey int NOT NULL, col_int_key int NOT NULL, KEY col_int_key (col_int_key) ); INSERT INTO t2 VALUES (4,0), (6,8), (3,1), (5,8), (3,9), (246,24), (2,6), (9,1), (3,6), (8,2), (1,4), (8,8), (8,4), (5,4), (7,7), (5,4), (1,1), (6,9), (2,4), (9,8); explain format=json SELECT grandparent1.* FROM t1 AS grandparent1 LEFT JOIN t1 USING (col_int_nokey) WHERE (col_int_nokey, col_int_nokey) IN (SELECT col_int_nokey, col_int_key FROM t2 ); EXPLAIN { "query_block": { "select_id": 1, "nested_loop": [ { "table": { "table_name": "grandparent1", "access_type": "ALL", "rows": 20, "filtered": 100 } }, { "table": { "table_name": "t2", "access_type": "ref", "possible_keys": [ "col_int_key" ], "key": "col_int_key", "used_key_parts": [ "col_int_key" ], "key_length": "4", "ref": [ "test.grandparent1.col_int_nokey" ], "rows": 2, "filtered": 100, "first_match": "grandparent1", "attached_condition": "(`test`.`t2`.`col_int_nokey` = `test`.`grandparent1`.`col_int_nokey`)" } }, { "table": { "table_name": "t1", "access_type": "ALL", "rows": 20, "filtered": 100, "using_join_buffer": "Block Nested Loop", "attached_condition": "<if>(is_not_null_compl(t1), (`test`.`t1`.`col_int_nokey` = `test`.`grandparent1`.`col_int_nokey`), true)" } } ] } } Warnings: Note 1003 /* select#1 */ select `test`.`grandparent1`.`col_int_nokey` AS `col_int_nokey`,`test`.`grandparent1`.`col_int_key` AS `col_int_key` from `test`.`t1` `grandparent1` semi join (`test`.`t2`) left join `test`.`t1` on((`test`.`t1`.`col_int_nokey` = `test`.`grandparent1`.`col_int_nokey`)) where ((`test`.`t2`.`col_int_nokey` = `test`.`grandparent1`.`col_int_nokey`) and (`test`.`t2`.`col_int_key` = `test`.`grandparent1`.`col_int_nokey`)) SELECT grandparent1.* FROM t1 AS grandparent1 LEFT JOIN t1 USING (col_int_nokey) WHERE (col_int_nokey, col_int_nokey) IN (SELECT col_int_nokey, col_int_key FROM t2 ); col_int_nokey col_int_key 1 7 1 6 7 0 7 3 7 0 7 3 1 7 1 6 8 5 8 1 8 5 8 1 DROP TABLE t1, t2; CREATE TABLE t1 ( pk int, col_int_key int, col_datetime_key datetime, col_varchar_key varchar(1), col_varchar_nokey varchar(1), PRIMARY KEY (pk), KEY col_int_key (col_int_key), KEY col_datetime_key (col_datetime_key), KEY col_varchar_key (col_varchar_key,col_int_key) ) engine=MyISAM; INSERT INTO t1 VALUES (10,7,'2004-06-06 04:22:12','v','v'), (11,0,'2005-11-13 01:12:31','s','s'), (12,9,'2002-05-04 01:50:00','l','l'), (13,3,'2004-10-27 10:28:45','y','y'), (14,4,'2006-07-22 05:24:23','c','c'), (15,2,'2002-05-16 21:34:03','i','i'), (16,5,'2008-04-17 10:45:30','h','h'), (17,3,'2009-04-21 02:58:02','q','q'), (18,1,'2008-01-11 11:01:51','a','a'), (19,3,'1900-01-01 00:00:00','v','v'), (20,6,'2007-05-17 18:24:57','u','u'), (21,7,'2007-08-07 00:00:00','s','s'), (22,5,'2001-08-28 00:00:00','y','y'), (23,1,'2004-04-16 00:27:28','z','z'), (24,204,'2005-05-03 07:06:22','h','h'), (25,224,'2009-03-11 17:09:50','p','p'), (26,9,'2007-12-08 01:54:28','e','e'), (27,5,'2009-07-28 18:19:54','i','i'), (28,0,'2008-06-08 00:00:00','y','y'), (29,3,'2005-02-09 09:20:26','w','w'); CREATE TABLE t2 ( pk int, col_int_key int, col_datetime_key datetime, col_varchar_key varchar(1), col_varchar_nokey varchar(1), PRIMARY KEY (pk), KEY col_int_key (col_int_key), KEY col_datetime_key (col_datetime_key), KEY col_varchar_key (col_varchar_key,col_int_key) ) engine=MyISAM; INSERT INTO t2 VALUES (1,0,'2002-02-13 17:30:06','j','j'), (2,8,'2008-09-27 00:34:58','v','v'), (3,1,'2007-05-28 00:00:00','c','c'), (4,8,'2009-07-25 09:21:20','m','m'), (5,9,'2002-01-16 00:00:00','d','d'), (6,24,'2006-10-12 04:32:53','d','d'), (7,6,'2001-02-15 03:08:38','y','y'), (8,1,'2004-10-02 20:31:15','t','t'), (9,6,'2002-08-20 22:48:00','d','d'), (10,2,'1900-01-01 00:00:00','s','s'), (11,4,'2005-08-15 00:00:00','r','r'), (12,8,'1900-01-01 00:00:00','m','m'), (13,4,'2008-05-16 08:09:06','b','b'), (14,4,'2001-01-20 12:47:23','x','x'), (15,7,'2008-07-02 00:00:00','g','g'), (16,4,'1900-01-01 00:00:00','p','p'), (17,1,'2002-12-08 11:34:58','q','q'), (18,9,'1900-01-01 00:00:00','w','w'), (19,4,'1900-01-01 00:00:00','d','d'), (20,8,'2002-08-25 20:35:06','e','e'); SELECT alias1.col_datetime_key FROM t2 AS alias1 RIGHT JOIN t2 AS alias2 JOIN t2 AS alias3 ON alias3.pk = alias2.pk ON alias3.col_varchar_nokey = alias2.col_varchar_key OR alias2.col_varchar_nokey WHERE (alias2.col_varchar_key, alias2.col_varchar_key) IN (SELECT sq2_alias2.col_varchar_key, sq2_alias1.col_varchar_nokey FROM t1 AS sq2_alias1, t1 AS sq2_alias2 WHERE sq2_alias2.col_int_key < 2); col_datetime_key 1900-01-01 00:00:00 1900-01-01 00:00:00 1900-01-01 00:00:00 1900-01-01 00:00:00 1900-01-01 00:00:00 1900-01-01 00:00:00 1900-01-01 00:00:00 1900-01-01 00:00:00 1900-01-01 00:00:00 1900-01-01 00:00:00 2001-01-20 12:47:23 2001-01-20 12:47:23 2001-02-15 03:08:38 2001-02-15 03:08:38 2002-01-16 00:00:00 2002-01-16 00:00:00 2002-02-13 17:30:06 2002-02-13 17:30:06 2002-08-20 22:48:00 2002-08-20 22:48:00 2002-08-25 20:35:06 2002-08-25 20:35:06 2002-12-08 11:34:58 2002-12-08 11:34:58 2004-10-02 20:31:15 2004-10-02 20:31:15 2005-08-15 00:00:00 2005-08-15 00:00:00 2006-10-12 04:32:53 2006-10-12 04:32:53 2007-05-28 00:00:00 2007-05-28 00:00:00 2008-05-16 08:09:06 2008-05-16 08:09:06 2008-07-02 00:00:00 2008-07-02 00:00:00 2008-09-27 00:34:58 2008-09-27 00:34:58 2009-07-25 09:21:20 2009-07-25 09:21:20 ALTER TABLE t1 DISABLE KEYS; ALTER TABLE t2 DISABLE KEYS; explain format=json SELECT alias1.col_datetime_key FROM t2 AS alias1 RIGHT JOIN t2 AS alias2 JOIN t2 AS alias3 ON alias3.pk = alias2.pk ON alias3.col_varchar_nokey = alias2.col_varchar_key OR alias2.col_varchar_nokey WHERE (alias2.col_varchar_key, alias2.col_varchar_key) IN (SELECT sq2_alias2.col_varchar_key, sq2_alias1.col_varchar_nokey FROM t1 AS sq2_alias1, t1 AS sq2_alias2 WHERE sq2_alias2.col_int_key < 2); EXPLAIN { "query_block": { "select_id": 1, "nested_loop": [ { "table": { "table_name": "alias2", "access_type": "ALL", "possible_keys": [ "PRIMARY" ], "rows": 20, "filtered": 100 } }, { "table": { "table_name": "alias3", "access_type": "eq_ref", "possible_keys": [ "PRIMARY" ], "key": "PRIMARY", "used_key_parts": [ "pk" ], "key_length": "4", "ref": [ "test.alias2.pk" ], "rows": 1, "filtered": 100 } }, { "table": { "table_name": "sq2_alias1", "access_type": "ALL", "rows": 20, "filtered": 100, "attached_condition": "(`test`.`sq2_alias1`.`col_varchar_nokey` = `test`.`alias2`.`col_varchar_key`)" } }, { "table": { "table_name": "sq2_alias2", "access_type": "ALL", "rows": 20, "filtered": 100, "first_match": "alias3", "attached_condition": "((`test`.`sq2_alias2`.`col_varchar_key` = `test`.`alias2`.`col_varchar_key`) and (`test`.`sq2_alias2`.`col_int_key` < 2))" } }, { "table": { "table_name": "alias1", "access_type": "ALL", "rows": 20, "filtered": 100, "using_join_buffer": "Block Nested Loop", "attached_condition": "((<if>(is_not_null_compl(alias1), ((`test`.`alias3`.`col_varchar_nokey` = `test`.`alias2`.`col_varchar_key`) or `test`.`alias2`.`col_varchar_nokey`), true) and <if>(is_not_null_compl(alias1), (((`test`.`alias3`.`col_varchar_nokey` = `test`.`alias2`.`col_varchar_key`) and (`test`.`sq2_alias1`.`col_varchar_nokey` = `test`.`alias2`.`col_varchar_key`)) or `test`.`alias2`.`col_varchar_nokey`), true)) and <if>(is_not_null_compl(alias1), (((`test`.`alias3`.`col_varchar_nokey` = `test`.`alias2`.`col_varchar_key`) and (`test`.`sq2_alias1`.`col_varchar_nokey` = `test`.`alias2`.`col_varchar_key`) and (`test`.`sq2_alias2`.`col_varchar_key` = `test`.`alias2`.`col_varchar_key`)) or `test`.`alias2`.`col_varchar_nokey`), true))" } } ] } } Warnings: Note 1003 /* select#1 */ select `test`.`alias1`.`col_datetime_key` AS `col_datetime_key` from `test`.`t2` `alias2` semi join (`test`.`t1` `sq2_alias1` join `test`.`t1` `sq2_alias2`) join `test`.`t2` `alias3` left join `test`.`t2` `alias1` on((((`test`.`alias3`.`col_varchar_nokey` = `test`.`alias2`.`col_varchar_key`) and (`test`.`sq2_alias1`.`col_varchar_nokey` = `test`.`alias2`.`col_varchar_key`) and (`test`.`sq2_alias2`.`col_varchar_key` = `test`.`alias2`.`col_varchar_key`)) or `test`.`alias2`.`col_varchar_nokey`)) where ((`test`.`alias3`.`pk` = `test`.`alias2`.`pk`) and (`test`.`sq2_alias1`.`col_varchar_nokey` = `test`.`alias2`.`col_varchar_key`) and (`test`.`sq2_alias2`.`col_varchar_key` = `test`.`alias2`.`col_varchar_key`) and (`test`.`sq2_alias2`.`col_int_key` < 2)) SELECT alias1.col_datetime_key FROM t2 AS alias1 RIGHT JOIN t2 AS alias2 JOIN t2 AS alias3 ON alias3.pk = alias2.pk ON alias3.col_varchar_nokey = alias2.col_varchar_key OR alias2.col_varchar_nokey WHERE (alias2.col_varchar_key, alias2.col_varchar_key) IN (SELECT sq2_alias2.col_varchar_key, sq2_alias1.col_varchar_nokey FROM t1 AS sq2_alias1, t1 AS sq2_alias2 WHERE sq2_alias2.col_int_key < 2); col_datetime_key 2002-02-13 17:30:06 2002-02-13 17:30:06 2008-09-27 00:34:58 2008-09-27 00:34:58 2007-05-28 00:00:00 2007-05-28 00:00:00 2009-07-25 09:21:20 2009-07-25 09:21:20 2002-01-16 00:00:00 2002-01-16 00:00:00 2006-10-12 04:32:53 2006-10-12 04:32:53 2001-02-15 03:08:38 2001-02-15 03:08:38 2004-10-02 20:31:15 2004-10-02 20:31:15 2002-08-20 22:48:00 2002-08-20 22:48:00 1900-01-01 00:00:00 1900-01-01 00:00:00 2005-08-15 00:00:00 2005-08-15 00:00:00 1900-01-01 00:00:00 1900-01-01 00:00:00 2008-05-16 08:09:06 2008-05-16 08:09:06 2001-01-20 12:47:23 2001-01-20 12:47:23 2008-07-02 00:00:00 2008-07-02 00:00:00 1900-01-01 00:00:00 1900-01-01 00:00:00 2002-12-08 11:34:58 2002-12-08 11:34:58 1900-01-01 00:00:00 1900-01-01 00:00:00 1900-01-01 00:00:00 1900-01-01 00:00:00 2002-08-25 20:35:06 2002-08-25 20:35:06 DROP TABLE t1, t2; # End of test for bug#14064201. # # Bug#18223655:ASSERTION FAILED: (INT)IDX >= 0 # && IDX < PARENT_JOIN->TABLES # CREATE TABLE b (d INT); CREATE TABLE c (a INT, b INT,c INT,d BLOB NOT NULL); SELECT(SELECT 1 FROM b WHERE(SELECT 1 IN (SELECT 1 FROM b WHERE 1 NOT BETWEEN d AND 1) FROM b) IN (SELECT d FROM c)) as cc FROM b; cc INSERT INTO b VALUE(1); INSERT INTO c VALUES(1,2,3,'1'),(2,3,4,'1'),(3,4,5,'C'); SELECT(SELECT d FROM b WHERE(SELECT d IN (SELECT d FROM b WHERE 1 NOT BETWEEN d AND 1) FROM b) IN (SELECT d FROM c)) as cc FROM c; cc 1 1 1 DROP TABLE b,c; # # Bug#18447874:WRONG RESULT COMING FROM SEMI-JOIN # CREATE TABLE b ( d INT(11) ); CREATE TABLE c ( d BLOB ) ; CREATE TABLE d ( b INT(11) ); INSERT INTO b VALUES(1),(2),(4); INSERT INTO c VALUES(1),(2),(3); SELECT 1 FROM b WHERE (SELECT 1 FROM d ) IN (SELECT d FROM c) ; 1 INSERT INTO d VALUES(2); SELECT 1 FROM b WHERE (SELECT 1 FROM d ) IN (SELECT d FROM c) ; 1 1 1 1 DROP TABLE b,c,d; # # Bug#17292723:INCORRECT RESULT FOR (SELECT...) IN (SELECT...) STATEMENT # CREATE TABLE t1 ( ID int(11) NOT NULL AUTO_INCREMENT, id2 int(11) DEFAULT NULL, id3 int(11) DEFAULT NULL, id4 varchar(150) COLLATE utf8_spanish_ci NOT NULL, id5 int(11) DEFAULT NULL, PRIMARY KEY (ID), KEY id2 (id2), KEY id3 (id3), KEY id5 (id5) ) ENGINE=InnoDB; INSERT INTO t1 VALUES (123,1,1,'1',NULL), (124,1,1,'2',NULL), (125,1,1,'4',NULL), (126,1,1,'3',NULL), (127,1,1,'6',NULL), (128,1,1,'8',NULL); CREATE TABLE t2 ( id6 int(11) NOT NULL, id7 int(11) NOT NULL, PRIMARY KEY (id6,id7), KEY id7 (id7) ) ENGINE=InnoDB; INSERT INTO t2 VALUES (126,123),(130,123),(135,123); SELECT ID FROM t1 p0 WHERE p0.id3=1 AND ( (SELECT p1.id FROM t1 p1 WHERE p1.id=123) IN (SELECT p3.id FROM t2 p2, t1 p3 WHERE p0.id=p2.id6 AND p2.id7=p3.id)); ID 126 DROP TABLE t1,t2; # # Bug#18194196: OPTIMIZER EXECUTES STATEMENT INPERFORMANT # CREATE TABLE t1 (uid INTEGER, fid INTEGER, INDEX(uid)); INSERT INTO t1 VALUES (1,1), (1,2), (1,3), (1,4), (2,5), (2,6), (2,7), (2,8), (3,1), (3,2), (3,9); CREATE TABLE t2 (uid INT PRIMARY KEY, name VARCHAR(128), INDEX(name)); INSERT INTO t2 VALUES (1, "A"), (2, "B"), (3, "C"), (4, "D"), (5, "E"), (6, "F"), (7, "G"), (8, "H"), (9, "I"); CREATE TABLE t3 (uid INT, fid INT, INDEX(uid)); INSERT INTO t3 VALUES (1,1), (1,2), (1,3),(1,4), (2,5), (2,6), (2,7), (2,8), (3,1), (3,2), (3,9); CREATE TABLE t4 (uid INT PRIMARY KEY, name VARCHAR(128), INDEX(name)); INSERT INTO t4 VALUES (1, "A"), (2, "B"), (3, "C"), (4, "D"), (5, "E"), (6, "F"), (7, "G"), (8, "H"), (9, "I"); ANALYZE TABLE t1,t2,t3,t4; Table Op Msg_type Msg_text test.t1 analyze status OK test.t2 analyze status OK test.t3 analyze status OK test.t4 analyze status OK EXPLAIN SELECT name FROM t2, t1 WHERE t1.uid IN (SELECT t4.uid FROM t4, t3 WHERE t3.uid=1 AND t4.uid=t3.fid) AND t2.uid=t1.fid; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ref uid uid 5 const 4 Using where; Start temporary 1 SIMPLE t4 eq_ref PRIMARY PRIMARY 4 test.t3.fid 1 Using index 1 SIMPLE t1 ALL uid NULL NULL NULL 11 Using where; End temporary; Using join buffer (Block Nested Loop) 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.fid 1 NULL FLUSH STATUS; SELECT name FROM t2, t1 WHERE t1.uid IN (SELECT t4.uid FROM t4, t3 WHERE t3.uid=1 AND t4.uid=t3.fid) AND t2.uid=t1.fid; name A B C D E F G H A B I SHOW STATUS LIKE '%handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 16 Handler_read_last 0 Handler_read_next 4 Handler_read_prev 0 Handler_read_rnd 0 Handler_read_rnd_next 12 DROP TABLE t1,t2,t3,t4; # End of test for Bug#18194196 # # Bug#21184091 ASSERT `READ_ROWS >= 0.0' AT # COST_MODEL_SERVER::TMPTABLE_READWRITE_COST() # CREATE TABLE t1 ( col_int int(11), pk int(11) NOT NULL, col_int_key int(11) , col_varchar varchar(1), PRIMARY KEY (pk) ) ENGINE=MyISAM; CREATE TABLE t2 ( col_int int(11), col_varchar varchar(1) ) ENGINE=MyISAM; INSERT INTO t2 VALUES (19,'x'); INSERT INTO t2 VALUES (20,'z'); SELECT table1.col_varchar FROM (t2 AS table1 RIGHT JOIN ((t2 STRAIGHT_JOIN t1 ON (t1.col_varchar = t2.col_varchar))) ON (t1.pk = t2.col_int)) WHERE (t1.pk IN (SELECT t1.col_int_key FROM (t1 INNER JOIN t2 ON (t2.col_int = t1.col_int)))) AND table1.col_varchar != 'q'; col_varchar DROP TABLE t1,t2; # End of test for Bug#21184091 set @@optimizer_switch=@old_opt_switch; # End of 5.6 tests # Bug#21139722: Assertion failed: !(used_tables() & ((table_map) 1) ... CREATE TABLE t1(a INTEGER) engine=innodb; CREATE TABLE t2(b INTEGER) engine=innodb; explain SELECT 1 FROM (SELECT 1 IN (SELECT 1 FROM t1 WHERE (SELECT 1 FROM t2 HAVING b) NOT IN (SELECT 1 FROM t2) ) FROM t2 ) AS z; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 NULL 2 DERIVED t2 ALL NULL NULL NULL NULL 1 NULL 3 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 1 Using where 5 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 1 Using where 4 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 1 NULL SELECT 1 FROM (SELECT 1 IN (SELECT 1 FROM t1 WHERE (SELECT 1 FROM t2 HAVING b) NOT IN (SELECT 1 FROM t2) ) FROM t2 ) AS z; 1 DROP TABLE t1, t2; CREATE TABLE t1(a INTEGER) engine=innodb; explain SELECT (SELECT a FROM t1 AS t2 WHERE a IN (SELECT t1.a+t2.a FROM t1 AS t3)) FROM t1 AS t1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 1 NULL 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 1 Using where 2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 1 FirstMatch(t2); Using join buffer (Block Nested Loop) SELECT (SELECT a FROM t1 AS t2 WHERE a IN (SELECT t1.a+t2.a FROM t1 AS t3)) FROM t1 AS t1; (SELECT a FROM t1 AS t2 WHERE a IN (SELECT t1.a+t2.a FROM t1 AS t3)) DROP TABLE t1; # End of test for Bug#21139722 # # Bug#21139402 ASSERTION FAILED: LENGTH > 0 && KEYPARTS != 0, CRASH IN JOIN::OPTIMIZE_KEYUSE # CREATE TABLE t1 (a INT, b INT, PRIMARY KEY(a)); CREATE TABLE t2 (c INT PRIMARY KEY); EXPLAIN SELECT 1 FROM t1 WHERE 1 IN (SELECT (c IS NULL) IN (SELECT a FROM t1 WHERE b) FROM t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables SELECT 1 FROM t1 WHERE 1 IN (SELECT (c IS NULL) IN (SELECT a FROM t1 WHERE b) FROM t2); 1 DROP TABLE t1,t2; # # Bug #22305361: QUERY WITH MATERIALIZED TABLE RETURNS INCORRECT # RESULTS IN 5.6 # CREATE TABLE t(a INT,b INT); INSERT INTO t VALUES (1,0),(1,0),(1,0),(1,0),(1,1); EXPLAIN extended SELECT * FROM t AS t1 WHERE t1.a IN (SELECT t2.a FROM t AS t2 WHERE CONCAT(t2.a,'') NOT IN (SELECT t3.a FROM t AS t3 WHERE t3.b=1)); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00 NULL 1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; FirstMatch(t1); Using join buffer (Block Nested Loop) 3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 5 100.00 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t` `t1` semi join (`test`.`t` `t2`) where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (not(<in_optimizer>(concat(`test`.`t1`.`a`,''),<exists>(/* select#3 */ select 1 from `test`.`t` `t3` where ((`test`.`t3`.`b` = 1) and <if>(outer_field_is_not_null, ((<cache>(concat(`test`.`t1`.`a`,'')) = `test`.`t3`.`a`) or isnull(`test`.`t3`.`a`)), true)) having <if>(outer_field_is_not_null, <is_not_null_test>(`test`.`t3`.`a`), true)))))) SELECT * FROM t AS t1 WHERE t1.a IN (SELECT t2.a FROM t AS t2 WHERE CONCAT(t2.a,'') NOT IN (SELECT t3.a FROM t AS t3 WHERE t3.b=1)); a b DROP TABLE t; # # Bug#51457 Firstmatch semijoin strategy gives wrong results for # certain query plans # SET @@default_storage_engine='innodb'; SET @@optimizer_switch='semijoin=on,materialization=off,firstmatch=on,loosescan=off,block_nested_loop=off,batched_key_access=off'; CREATE TABLE t0(a INTEGER); CREATE TABLE t1(a INTEGER); INSERT INTO t1 VALUES(1); CREATE TABLE t2(a INTEGER); INSERT INTO t2 VALUES(5), (8); CREATE TABLE t6(a INTEGER); INSERT INTO t6 VALUES(7), (1), (0), (5), (1), (4); CREATE TABLE t8(a INTEGER); INSERT INTO t8 VALUES(1), (3), (5), (7), (9), (7), (3), (1); EXPLAIN SELECT * FROM t2 AS nt2 WHERE 1 IN (SELECT it1.a FROM t1 AS it1 JOIN t6 AS it3 ON it1.a=it3.a); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE it1 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE it3 ALL NULL NULL NULL NULL 6 Using where; FirstMatch 1 SIMPLE nt2 ALL NULL NULL NULL NULL 2 NULL SELECT * FROM t2 AS nt2 WHERE 1 IN (SELECT it1.a FROM t1 AS it1 JOIN t6 AS it3 ON it1.a=it3.a); a 5 8 EXPLAIN SELECT * FROM t2 AS nt2, t8 AS nt4 WHERE 1 IN (SELECT it1.a FROM t1 AS it1 JOIN t6 AS it3 ON it1.a=it3.a); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE it1 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE it3 ALL NULL NULL NULL NULL 6 Using where; FirstMatch 1 SIMPLE nt2 ALL NULL NULL NULL NULL 2 NULL 1 SIMPLE nt4 ALL NULL NULL NULL NULL 8 NULL SELECT * FROM t2 AS nt2, t8 AS nt4 WHERE 1 IN (SELECT it1.a FROM t1 AS it1 JOIN t6 AS it3 ON it1.a=it3.a); a a 5 1 5 3 5 5 5 7 5 9 5 7 5 3 5 1 8 1 8 3 8 5 8 7 8 9 8 7 8 3 8 1 EXPLAIN SELECT * FROM t0 AS ot1, t2 AS nt3 WHERE ot1.a IN (SELECT it2.a FROM t1 AS it2 JOIN t8 AS it4 ON it2.a=it4.a); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE ot1 ALL NULL NULL NULL NULL 1 NULL 1 SIMPLE it2 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE it4 ALL NULL NULL NULL NULL 8 Using where; FirstMatch(ot1) 1 SIMPLE nt3 ALL NULL NULL NULL NULL 2 NULL SELECT * FROM t0 as ot1, t2 AS nt3 WHERE ot1.a IN (SELECT it2.a FROM t1 AS it2 JOIN t8 AS it4 ON it2.a=it4.a); a a DROP TABLE t0, t1, t2, t6, t8; SET @@default_storage_engine=default; SET @@optimizer_switch=default; # End of bug#51457 set optimizer_switch=default; set optimizer_switch=default;