EVOLUTION-MANAGER

Edit File: subselect_sj_mat.result

set @subselect_sj_mat_tmp= @@optimizer_switch; set optimizer_switch=ifnull(@subselect_mat_test_optimizer_switch_value, 'semijoin=on,firstmatch=on,loosescan=on,semijoin_with_cache=on'); set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on'; set @optimizer_switch_local_default= @@optimizer_switch; set @save_join_cache_level=@@join_cache_level; set join_cache_level=1; drop table if exists t1, t2, t3, t4, t5, t1i, t2i, t3i; drop table if exists columns; drop table if exists t1_16, t2_16, t3_16; drop view if exists v1, v2, v1m, v2m; 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'); create table t1i (a1 char(8), a2 char(8)); create table t2i (b1 char(8), b2 char(8)); create table t3i (c1 char(8), c2 char(8)); create index it1i1 on t1i (a1); create index it1i2 on t1i (a2); create index it1i3 on t1i (a1, a2); create index it2i1 on t2i (b1); create index it2i2 on t2i (b2); create index it2i3 on t2i (b1, b2); create index it3i1 on t3i (c1); create index it3i2 on t3i (c2); create index it3i3 on t3i (c1, c2); insert into t1i select * from t1; insert into t2i select * from t2; insert into t3i select * from t3; set @@optimizer_switch='materialization=on,in_to_exists=off,firstmatch=off'; /****************************************************************************** * Simple tests. ******************************************************************************/ # non-indexed nullable fields explain extended select * from t1 where a1 in (select b1 from t2 where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func 1 100.00 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 5 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b1` > '0' select * from t1 where a1 in (select b1 from t2 where b1 > '0'); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func 1 100.00 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 5 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b1` > '0' select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 16 func,func 1 100.00 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 5 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b1` > '0' select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 16 test.t1.a1,test.t1.a2 1 100.00 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from <materialize> (/* select#2 */ select `test`.`t2`.`b1`,min(`test`.`t2`.`b2`) from `test`.`t2` where `test`.`t2`.`b1` > '0' group by `test`.`t2`.`b1`) join `test`.`t1` where `<subquery2>`.`b1` = `test`.`t1`.`a1` and `<subquery2>`.`min(b2)` = `test`.`t1`.`a2` select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1i where a1 in (select b1 from t2i where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2i index it2i1,it2i3 it2i1 # NULL 5 50.00 Using where; Using index; LooseScan 1 PRIMARY t1i ref _it1_idx _it1_idx # _ref_ 1 100.00 Warnings: Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` semi join (`test`.`t2i`) where `test`.`t1i`.`a1` = `test`.`t2i`.`b1` and `test`.`t2i`.`b1` > '0' select * from t1i where a1 in (select b1 from t2i where b1 > '0'); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1i where a1 in (select max(b1) from t2i where b1 > '0' group by b1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1i index it1i1,it1i3 # 18 # 3 100.00 # 1 PRIMARY <subquery2> eq_ref distinct_key # 8 # 1 100.00 # 2 MATERIALIZED t2i range it2i1,it2i3 # 9 # 5 100.00 # Warnings: Note 1003 /* select#1 */ select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from <materialize> (/* select#2 */ select max(`test`.`t2i`.`b1`) from `test`.`t2i` where `test`.`t2i`.`b1` > '0' group by `test`.`t2i`.`b1`) join `test`.`t1i` where `<subquery2>`.`max(b1)` = `test`.`t1i`.`a1` select * from t1i where a1 in (select max(b1) from t2i where b1 > '0' group by b1); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2i index it2i1,it2i2,it2i3 it2i3 # NULL 5 50.00 Using where; Using index; LooseScan 1 PRIMARY t1i ref _it1_idx _it1_idx # _ref_ 1 100.00 Warnings: Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` semi join (`test`.`t2i`) where `test`.`t1i`.`a1` = `test`.`t2i`.`b1` and `test`.`t1i`.`a2` = `test`.`t2i`.`b2` and `test`.`t2i`.`b1` > '0' select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0'); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1i where (a1, a2) in (select b1, max(b2) from t2i where b1 > '0' group by b1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1i index it1i1,it1i2,it1i3 # # # 3 100.00 # 1 PRIMARY <subquery2> eq_ref distinct_key # # # 1 100.00 # 2 MATERIALIZED t2i range it2i1,it2i3 # # # 3 100.00 # Warnings: Note 1003 /* select#1 */ select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from <materialize> (/* select#2 */ select `test`.`t2i`.`b1`,max(`test`.`t2i`.`b2`) from `test`.`t2i` where `test`.`t2i`.`b1` > '0' group by `test`.`t2i`.`b1`) join `test`.`t1i` where `<subquery2>`.`b1` = `test`.`t1i`.`a1` and `<subquery2>`.`max(b2)` = `test`.`t1i`.`a2` select * from t1i where (a1, a2) in (select b1, max(b2) from t2i where b1 > '0' group by b1); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1i index it1i1,it1i2,it1i3 # # # 3 100.00 # 1 PRIMARY <subquery2> eq_ref distinct_key # # # 1 100.00 # 2 MATERIALIZED t2i range it2i1,it2i3 # # # 3 100.00 # Warnings: Note 1003 /* select#1 */ select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from <materialize> (/* select#2 */ select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where `test`.`t2i`.`b1` > '0' group by `test`.`t2i`.`b1`) join `test`.`t1i` where `<subquery2>`.`b1` = `test`.`t1i`.`a1` and `<subquery2>`.`min(b2)` = `test`.`t1i`.`a2` select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 16 test.t1.a1,test.t1.a2 1 100.00 2 MATERIALIZED t2i range NULL it2i3 9 NULL 3 100.00 Using index for group-by Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from <materialize> (/* select#2 */ select `test`.`t2i`.`b1`,max(`test`.`t2i`.`b2`) from `test`.`t2i` group by `test`.`t2i`.`b1`) join `test`.`t1` where `<subquery2>`.`b1` = `test`.`t1`.`a1` and `<subquery2>`.`max(b2)` = `test`.`t1`.`a2` select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 prepare st1 from "explain select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)"; execute st1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 16 test.t1.a1,test.t1.a2 1 2 MATERIALIZED t2i range NULL it2i3 9 NULL 3 Using index for group-by execute st1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 16 test.t1.a1,test.t1.a2 1 2 MATERIALIZED t2i range NULL it2i3 9 NULL 3 Using index for group-by prepare st2 from "select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)"; execute st2; a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 execute st2; a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 16 test.t1.a1,test.t1.a2 1 100.00 2 MATERIALIZED t2i range it2i1,it2i3 it2i3 18 NULL 3 100.00 Using where; Using index for group-by Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from <materialize> (/* select#2 */ select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where `test`.`t2i`.`b1` > '0' group by `test`.`t2i`.`b1`) join `test`.`t1` where `<subquery2>`.`b1` = `test`.`t1`.`a1` and `<subquery2>`.`min(b2)` = `test`.`t1`.`a2` select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 select * from t1 where (a1, a2) in (select b1, min(b2) from t2i limit 1,1); ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery' set @save_optimizer_switch=@@optimizer_switch; set @@optimizer_switch=@optimizer_switch_local_default; set @@optimizer_switch='semijoin=off'; prepare st1 from "select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)"; set @@optimizer_switch=@optimizer_switch_local_default; set @@optimizer_switch='materialization=off,in_to_exists=on'; execute st1; a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 set @@optimizer_switch=@optimizer_switch_local_default; set @@optimizer_switch='semijoin=off'; execute st1; a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 set @@optimizer_switch=@optimizer_switch_local_default; set @@optimizer_switch='materialization=off,in_to_exists=on'; prepare st1 from "select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)"; set @@optimizer_switch=@optimizer_switch_local_default; set @@optimizer_switch='semijoin=off'; execute st1; a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 set @@optimizer_switch=@optimizer_switch_local_default; set @@optimizer_switch='materialization=off,in_to_exists=on'; execute st1; a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 set @@optimizer_switch=@save_optimizer_switch; explain extended select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 16 test.t1.a1,test.t1.a2 1 100.00 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 5 100.00 Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from <materialize> (/* select#2 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` order by `test`.`t2`.`b1`,`test`.`t2`.`b2`) join `test`.`t1` where `<subquery2>`.`b1` = `test`.`t1`.`a1` and `<subquery2>`.`b2` = `test`.`t1`.`a2` select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1i index it1i1,it1i2,it1i3 it1i3 18 NULL 3 100.00 Using where; Using index 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 16 test.t1i.a1,test.t1i.a2 1 100.00 2 MATERIALIZED t2i index NULL it2i3 18 NULL 5 100.00 Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from <materialize> (/* select#2 */ select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` order by `test`.`t2i`.`b1`,`test`.`t2i`.`b2`) join `test`.`t1i` where `<subquery2>`.`b1` = `test`.`t1i`.`a1` and `<subquery2>`.`b2` = `test`.`t1i`.`a2` select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 /****************************************************************************** * Views, UNIONs, several levels of nesting. ******************************************************************************/ # materialize the result of subquery over temp-table view create algorithm=merge view v1 as select b1, c2 from t2, t3 where b2 > c2; create algorithm=merge view v2 as select b1, c2 from t2, t3 group by b2, c2; Warnings: Warning 1354 View merge algorithm can't be used here for now (assumed undefined algorithm) create algorithm=temptable view v1m as select b1, c2 from t2, t3 where b2 > c2; create algorithm=temptable view v2m as select b1, c2 from t2, t3 group by b2, c2; select * from v1 where (c2, b1) in (select c2, b1 from v2 where b1 is not null); b1 c2 1 - 02 2 - 01 1 - 02 2 - 01 1 - 03 2 - 01 1 - 03 2 - 02 select * from v1 where (c2, b1) in (select distinct c2, b1 from v2 where b1 is not null); b1 c2 1 - 02 2 - 01 1 - 02 2 - 01 1 - 03 2 - 01 1 - 03 2 - 02 select * from v1m where (c2, b1) in (select c2, b1 from v2m where b1 is not null); b1 c2 1 - 02 2 - 01 1 - 02 2 - 01 1 - 03 2 - 01 1 - 03 2 - 02 select * from v1m where (c2, b1) in (select distinct c2, b1 from v2m where b1 is not null); b1 c2 1 - 02 2 - 01 1 - 02 2 - 01 1 - 03 2 - 01 1 - 03 2 - 02 drop view v1, v2, v1m, v2m; explain extended select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and (a1, a2) in (select c1, c2 from t3 where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 16 func,func 1 100.00 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 16 func,func 1 100.00 3 MATERIALIZED t3 ALL NULL NULL NULL NULL 4 100.00 Using where 3 MATERIALIZED t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer (flat, BNL join) 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 5 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3`) where `test`.`t2i`.`b1` = `test`.`t3`.`c1` and `test`.`t2i`.`b2` = `test`.`t3`.`c2` and `test`.`t2`.`b1` > '0' and `test`.`t3`.`c2` > '0' select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and (a1, a2) in (select c1, c2 from t3 where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and (a1, a2) in (select c1, c2 from t3i where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2i index it2i1,it2i2,it2i3 # # # 5 50.00 # 1 PRIMARY t1i ref it1i1,it1i2,it1i3 # # # 1 100.00 # 1 PRIMARY t3i ref it3i1,it3i2,it3i3 # # # 1 100.00 # 1 PRIMARY t2i ref it2i1,it2i2,it2i3 # # # 2 100.00 # Warnings: Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` semi join (`test`.`t2i`) semi join (`test`.`t2i` join `test`.`t3i`) where `test`.`t1i`.`a1` = `test`.`t2i`.`b1` and `test`.`t3i`.`c1` = `test`.`t2i`.`b1` and `test`.`t2i`.`b1` = `test`.`t2i`.`b1` and `test`.`t1i`.`a2` = `test`.`t2i`.`b2` and `test`.`t3i`.`c2` = `test`.`t2i`.`b2` and `test`.`t2i`.`b2` = `test`.`t2i`.`b2` and `test`.`t2i`.`b1` > '0' and `test`.`t2i`.`b2` > '0' select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and (a1, a2) in (select c1, c2 from t3i where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1 where (a1, a2) in (select b1, b2 from t2 where b2 in (select c2 from t3 where c2 LIKE '%02') or b2 in (select c2 from t3 where c2 LIKE '%03')) and (a1, a2) in (select c1, c2 from t3 where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY <subquery5> eq_ref distinct_key distinct_key 16 func,func 1 100.00 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 16 func,func 1 100.00 5 MATERIALIZED t3 ALL NULL NULL NULL NULL 4 100.00 Using where 5 MATERIALIZED t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer (flat, BNL join) 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 5 100.00 Using where 4 MATERIALIZED t3 ALL NULL NULL NULL NULL 4 100.00 Using where 3 MATERIALIZED t3 ALL NULL NULL NULL NULL 4 100.00 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3`) where `test`.`t2i`.`b1` = `test`.`t3`.`c1` and `test`.`t2i`.`b2` = `test`.`t3`.`c2` and (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#3 */ select `test`.`t3`.`c2` from `test`.`t3` where `test`.`t3`.`c2` like '%02' ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where `test`.`t2`.`b2` = `<subquery3>`.`c2`)))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#4 */ select `test`.`t3`.`c2` from `test`.`t3` where `test`.`t3`.`c2` like '%03' ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where `test`.`t2`.`b2` = `<subquery4>`.`c2`))))) and `test`.`t3`.`c2` > '0' select * from t1 where (a1, a2) in (select b1, b2 from t2 where b2 in (select c2 from t3 where c2 LIKE '%02') or b2 in (select c2 from t3 where c2 LIKE '%03')) and (a1, a2) in (select c1, c2 from t3 where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); a1 a2 1 - 02 2 - 02 explain extended select * from t1 where (a1, a2) in (select b1, b2 from t2 where b2 in (select c2 from t3 t3a where c1 = a1) or b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and (a1, a2) in (select c1, c2 from t3 t3c where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY <subquery5> eq_ref distinct_key distinct_key 16 func,func 1 100.00 1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) 5 MATERIALIZED t3c ALL NULL NULL NULL NULL 4 100.00 Using where 5 MATERIALIZED t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer (flat, BNL join) 4 MATERIALIZED t3b ALL NULL NULL NULL NULL 4 100.00 Using where 3 DEPENDENT SUBQUERY t3a ALL NULL NULL NULL NULL 4 100.00 Using where Warnings: Note 1276 Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1 Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3` `t3c`) where `test`.`t2i`.`b1` = `test`.`t3c`.`c1` and `test`.`t2`.`b1` = `test`.`t1`.`a1` and `test`.`t2i`.`b2` = `test`.`t3c`.`c2` and `test`.`t2`.`b2` = `test`.`t1`.`a2` and (<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(/* select#3 */ select `test`.`t3a`.`c2` from `test`.`t3` `t3a` where `test`.`t3a`.`c1` = `test`.`t1`.`a1` and <cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#4 */ select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where `test`.`t3b`.`c2` like '%03' ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where `test`.`t2`.`b2` = `<subquery4>`.`c2`))))) and `test`.`t3c`.`c2` > '0' select * from t1 where (a1, a2) in (select b1, b2 from t2 where b2 in (select c2 from t3 t3a where c1 = a1) or b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and (a1, a2) in (select c1, c2 from t3 t3c where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended (select * from t1 where (a1, a2) in (select b1, b2 from t2 where b2 in (select c2 from t3 where c2 LIKE '%02') or b2 in (select c2 from t3 where c2 LIKE '%03') group by b1, b2) and (a1, a2) in (select c1, c2 from t3 where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))) UNION (select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and (a1, a2) in (select c1, c2 from t3i where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL # # # 3 100.00 # 1 PRIMARY <subquery5> eq_ref distinct_key # # # 1 100.00 # 1 PRIMARY <subquery2> eq_ref distinct_key # # # 1 100.00 # 5 MATERIALIZED t3 ALL NULL # # # 4 100.00 # 5 MATERIALIZED t2i index it2i1,it2i2,it2i3 # # # 5 80.00 # 2 MATERIALIZED t2 ALL NULL # # # 5 100.00 # 4 MATERIALIZED t3 ALL NULL # # # 4 100.00 # 3 MATERIALIZED t3 ALL NULL # # # 4 100.00 # 7 UNION t2i index it2i1,it2i2,it2i3 # # # 5 50.00 # 7 UNION t1i ref it1i1,it1i2,it1i3 # # # 1 100.00 # 7 UNION t3i ref it3i1,it3i2,it3i3 # # # 1 100.00 # 7 UNION t2i ref it2i1,it2i2,it2i3 # # # 2 100.00 # NULL UNION RESULT <union1,7> ALL NULL # # # NULL NULL # Warnings: Note 1003 (/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3`) where `test`.`t2i`.`b1` = `test`.`t3`.`c1` and `test`.`t2i`.`b2` = `test`.`t3`.`c2` and (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#3 */ select `test`.`t3`.`c2` from `test`.`t3` where `test`.`t3`.`c2` like '%02' ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where `test`.`t2`.`b2` = `<subquery3>`.`c2`)))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#4 */ select `test`.`t3`.`c2` from `test`.`t3` where `test`.`t3`.`c2` like '%03' ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where `test`.`t2`.`b2` = `<subquery4>`.`c2`))))) and `test`.`t3`.`c2` > '0') union (/* select#7 */ select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` semi join (`test`.`t2i`) semi join (`test`.`t2i` join `test`.`t3i`) where `test`.`t1i`.`a1` = `test`.`t2i`.`b1` and `test`.`t3i`.`c1` = `test`.`t2i`.`b1` and `test`.`t2i`.`b1` = `test`.`t2i`.`b1` and `test`.`t1i`.`a2` = `test`.`t2i`.`b2` and `test`.`t3i`.`c2` = `test`.`t2i`.`b2` and `test`.`t2i`.`b2` = `test`.`t2i`.`b2` and `test`.`t2i`.`b1` > '0' and `test`.`t2i`.`b2` > '0') (select * from t1 where (a1, a2) in (select b1, b2 from t2 where b2 in (select c2 from t3 where c2 LIKE '%02') or b2 in (select c2 from t3 where c2 LIKE '%03') group by b1, b2) and (a1, a2) in (select c1, c2 from t3 where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))) UNION (select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and (a1, a2) in (select c1, c2 from t3i where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))); a1 a2 1 - 02 2 - 02 1 - 01 2 - 01 explain extended select * from t1 where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and (a1, a2) in (select c1, c2 from t3 where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY <subquery4> eq_ref distinct_key distinct_key 16 func,func 1 100.00 4 MATERIALIZED t3 ALL NULL NULL NULL NULL 4 100.00 Using where 4 MATERIALIZED t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer (flat, BNL join) 2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2i` join `test`.`t3`) where `test`.`t2i`.`b1` = `test`.`t3`.`c1` and `test`.`t2i`.`b2` = `test`.`t3`.`c2` and <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where `test`.`t1`.`a1` > '0' and <cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1` and <cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2` union /* select#3 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where `test`.`t2`.`b1` < '9' and <cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1` and <cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))) and `test`.`t3`.`c2` > '0' select * from t1 where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and (a1, a2) in (select c1, c2 from t3 where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 explain extended select * from t1, t3 where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and (c1, c2) in (select c1, c2 from t3 where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and a1 = c1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join) 1 PRIMARY <subquery4> eq_ref distinct_key distinct_key 16 func,func 1 100.00 4 MATERIALIZED t3 ALL NULL NULL NULL NULL 4 100.00 Using where 4 MATERIALIZED t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer (flat, BNL join) 2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t1` semi join (`test`.`t2i` join `test`.`t3`) join `test`.`t3` where `test`.`t3`.`c1` = `test`.`t1`.`a1` and `test`.`t2i`.`b1` = `test`.`t3`.`c1` and `test`.`t2i`.`b2` = `test`.`t3`.`c2` and <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where `test`.`t1`.`a1` > '0' and <cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1` and <cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2` union /* select#3 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where `test`.`t2`.`b1` < '9' and <cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1` and <cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))) and `test`.`t3`.`c2` > '0' select * from t1, t3 where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and (c1, c2) in (select c1, c2 from t3 where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and a1 = c1; a1 a2 c1 c2 1 - 01 2 - 01 1 - 01 2 - 01 1 - 02 2 - 02 1 - 02 2 - 02 /****************************************************************************** * Negative tests, where materialization should not be applied. ******************************************************************************/ # UNION in a subquery explain extended select * from t3 where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where 2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: Note 1003 /* select#1 */ select `test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c1`>(<in_optimizer>(`test`.`t3`.`c1`,<exists>(/* select#2 */ select `test`.`t1`.`a1` from `test`.`t1` where `test`.`t1`.`a1` > '0' and <cache>(`test`.`t3`.`c1`) = `test`.`t1`.`a1` union /* select#3 */ select `test`.`t2`.`b1` from `test`.`t2` where `test`.`t2`.`b1` < '9' and <cache>(`test`.`t3`.`c1`) = `test`.`t2`.`b1`))) select * from t3 where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9'); c1 c2 1 - 01 2 - 01 1 - 02 2 - 02 1 - 03 2 - 03 explain extended select * from t1 where (a1, a2) in (select b1, b2 from t2 where b2 in (select c2 from t3 t3a where c1 = a1) or b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and (a1, a2) in (select c1, c2 from t3 t3c where (c1, c2) in (select b1, b2 from t2i where b2 > '0' or b2 = a2)); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY t2i ref it2i1,it2i2,it2i3 it2i3 18 test.t1.a1,test.t1.a2 2 100.00 Using index; Start temporary 1 PRIMARY t3c ALL NULL NULL NULL NULL 4 100.00 Using where; End temporary; Using join buffer (flat, BNL join) 1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) 4 MATERIALIZED t3b ALL NULL NULL NULL NULL 4 100.00 Using where 3 DEPENDENT SUBQUERY t3a ALL NULL NULL NULL NULL 4 100.00 Using where Warnings: Note 1276 Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1 Note 1276 Field or reference 'test.t1.a2' of SELECT #6 was resolved in SELECT #1 Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3` `t3c`) where `test`.`t2i`.`b1` = `test`.`t1`.`a1` and `test`.`t3c`.`c1` = `test`.`t1`.`a1` and `test`.`t2`.`b1` = `test`.`t1`.`a1` and `test`.`t2i`.`b2` = `test`.`t1`.`a2` and `test`.`t3c`.`c2` = `test`.`t1`.`a2` and `test`.`t2`.`b2` = `test`.`t1`.`a2` and (<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(/* select#3 */ select `test`.`t3a`.`c2` from `test`.`t3` `t3a` where `test`.`t3a`.`c1` = `test`.`t1`.`a1` and <cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (/* select#4 */ select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where `test`.`t3b`.`c2` like '%03' ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where `test`.`t2`.`b2` = `<subquery4>`.`c2`))))) explain extended select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select '1 - 01','2 - 01' having (<cache>(`test`.`t1`.`a1`) = '1 - 01' or /*always not null*/ 1 is null) and (<cache>(`test`.`t1`.`a2`) = '2 - 01' or /*always not null*/ 1 is null) and '1 - 01' is null and '2 - 01' is null))) select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01'); a1 a2 1 - 01 2 - 01 explain extended select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select '1 - 01','2 - 01' having (<cache>(`test`.`t1`.`a1`) = '1 - 01' or /*always not null*/ 1 is null) and (<cache>(`test`.`t1`.`a2`) = '2 - 01' or /*always not null*/ 1 is null) and '1 - 01' is null and '2 - 01' is null))) select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual); a1 a2 1 - 01 2 - 01 /****************************************************************************** * Subqueries in other uncovered clauses. ******************************************************************************/ /* SELECT clause */ select ((a1,a2) IN (select * from t2 where b2 > '0')) IS NULL from t1; ((a1,a2) IN (select * from t2 where b2 > '0')) IS NULL 0 0 0 /* GROUP BY clause */ create table columns (col int key); insert into columns values (1), (2); explain extended select * from t1 group by (select col from columns limit 1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY columns index NULL PRIMARY 4 NULL 2 100.00 Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` group by (/* select#2 */ select `test`.`columns`.`col` from `test`.`columns` limit 1) select * from t1 group by (select col from columns limit 1); a1 a2 1 - 00 2 - 00 explain extended select * from t1 group by (a1 in (select col from columns)); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using temporary; Using filesort 2 DEPENDENT SUBQUERY columns unique_subquery PRIMARY PRIMARY 4 func 1 100.00 Using index; Using where; Full scan on NULL key Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` group by <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a1`) in columns on PRIMARY where trigcond(<cache>(`test`.`t1`.`a1`) = `test`.`columns`.`col`))))) select * from t1 group by (a1 in (select col from columns)); a1 a2 1 - 00 2 - 00 Warnings: Warning 1292 Truncated incorrect DOUBLE value: '1 - 00' Warning 1292 Truncated incorrect DOUBLE value: '1 - 01' Warning 1292 Truncated incorrect DOUBLE value: '1 - 02' /* ORDER BY clause */ explain extended select * from t1 order by (select col from columns limit 1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY columns index NULL PRIMARY 4 NULL 2 100.00 Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` order by (/* select#2 */ select `test`.`columns`.`col` from `test`.`columns` limit 1) select * from t1 order by (select col from columns limit 1); a1 a2 1 - 00 2 - 00 1 - 01 2 - 01 1 - 02 2 - 02 /****************************************************************************** * Column types/sizes that affect materialization. ******************************************************************************/ /* Test that BLOBs are not materialized (except when arguments of some functions). */ # force materialization to be always considered 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 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) Warnings: Note 1003 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 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) Warnings: Note 1003 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`.`t2_16`.`b2` = `test`.`t1_16`.`a2` 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 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 19 func 1 100.00 Using where 2 MATERIALIZED t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where Warnings: Note 1003 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 <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,<exists>(/* select#2 */ select group_concat(`test`.`t2_16`.`b1` separator ',') 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 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 260 test.t1_16.a1 1 100.00 Using where 2 MATERIALIZED 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 <materialize> (/* select#2 */ select group_concat(`test`.`t2_16`.`b1` separator ',') from `test`.`t2_16` group by `test`.`t2_16`.`b2`) join `test`.`t1_16` where `test`.`t1_16`.`a1` = `<subquery2>`.`group_concat(b1)` 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 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 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary; Using join buffer (flat, BNL join) 1 PRIMARY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join) 1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; End temporary; Using join buffer (flat, BNL join) Warnings: Note 1003 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`.`b1` = `test`.`t3`.`c1` and `test`.`t2_16`.`b1` = `test`.`t1_16`.`a1` and `test`.`t2_16`.`b2` = `test`.`t1_16`.`a2` and `test`.`t2`.`b2` = substr(`test`.`t1_16`.`a2`,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; 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 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) Warnings: Note 1003 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 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) Warnings: Note 1003 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`.`t2_512`.`b2` = `test`.`t1_512`.`a2` 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 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 516 func 1 100.00 Using where 2 MATERIALIZED t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where Warnings: Note 1003 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 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 260 test.t1_512.a1 1 100.00 Using where 2 MATERIALIZED 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 <materialize> (/* select#2 */ select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2`) join `test`.`t1_512` where `test`.`t1_512`.`a1` = `<subquery2>`.`group_concat(b1)` 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() 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 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 260 test.t1_512.a1 1 100.00 Using where 2 MATERIALIZED 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 <materialize> (/* select#2 */ select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2`) join `test`.`t1_512` where `test`.`t1_512`.`a1` = `<subquery2>`.`group_concat(b1)` 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() drop table t1_512, t2_512, t3_512; 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 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) Warnings: Note 1003 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 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) Warnings: Note 1003 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`.`t2_1024`.`b2` = `test`.`t1_1024`.`a2` 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 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) Warnings: Note 1003 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 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 260 test.t1_1024.a1 1 100.00 Using where 2 MATERIALIZED 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 <materialize> (/* select#2 */ select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2`) join `test`.`t1_1024` where `test`.`t1_1024`.`a1` = `<subquery2>`.`group_concat(b1)` 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() 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 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 260 test.t1_1024.a1 1 100.00 Using where 2 MATERIALIZED 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 <materialize> (/* select#2 */ select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2`) join `test`.`t1_1024` where `test`.`t1_1024`.`a1` = `<subquery2>`.`group_concat(b1)` 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() 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 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) Warnings: Note 1003 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 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) Warnings: Note 1003 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`.`t2_1025`.`b2` = `test`.`t1_1025`.`a2` 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 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) Warnings: Note 1003 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 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 260 test.t1_1025.a1 1 100.00 Using where 2 MATERIALIZED 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 <materialize> (/* select#2 */ select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2`) join `test`.`t1_1025` where `test`.`t1_1025`.`a1` = `<subquery2>`.`group_concat(b1)` 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() 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 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 260 test.t1_1025.a1 1 100.00 Using where 2 MATERIALIZED 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 <materialize> (/* select#2 */ select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2`) join `test`.`t1_1025` where `test`.`t1_1025`.`a1` = `<subquery2>`.`group_concat(b1)` 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() drop table t1_1025, t2_1025, t3_1025; create table t1bit (a1 bit(3), a2 bit(3)); create table t2bit (b1 bit(3), b2 bit(3)); insert into t1bit values (b'000', b'100'); insert into t1bit values (b'001', b'101'); insert into t1bit values (b'010', b'110'); insert into t2bit values (b'001', b'101'); insert into t2bit values (b'010', b'110'); insert into t2bit values (b'110', b'111'); explain extended select bin(a1), bin(a2) from t1bit where (a1, a2) in (select b1, b2 from t2bit); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1bit ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1 100.00 2 MATERIALIZED t2bit ALL NULL NULL NULL NULL 3 100.00 Warnings: Note 1003 select conv(`test`.`t1bit`.`a1`,10,2) AS `bin(a1)`,conv(`test`.`t1bit`.`a2`,10,2) AS `bin(a2)` from `test`.`t1bit` semi join (`test`.`t2bit`) where 1 select bin(a1), bin(a2) from t1bit where (a1, a2) in (select b1, b2 from t2bit); bin(a1) bin(a2) 1 101 10 110 drop table t1bit, t2bit; create table t1bb (a1 bit(3), a2 blob(3)); create table t2bb (b1 bit(3), b2 blob(3)); insert into t1bb values (b'000', '100'); insert into t1bb values (b'001', '101'); insert into t1bb values (b'010', '110'); insert into t2bb values (b'001', '101'); insert into t2bb values (b'010', '110'); insert into t2bb values (b'110', '111'); explain extended select bin(a1), a2 from t1bb where (a1, a2) in (select b1, b2 from t2bb); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1bb ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY t2bb ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) Warnings: Note 1003 select conv(`test`.`t1bb`.`a1`,10,2) AS `bin(a1)`,`test`.`t1bb`.`a2` AS `a2` from `test`.`t1bb` semi join (`test`.`t2bb`) where `test`.`t2bb`.`b1` = `test`.`t1bb`.`a1` and `test`.`t2bb`.`b2` = `test`.`t1bb`.`a2` select bin(a1), a2 from t1bb where (a1, a2) in (select b1, b2 from t2bb); bin(a1) a2 1 101 10 110 drop table t1bb, t2bb; drop table t1, t2, t3, t1i, t2i, t3i, columns; /****************************************************************************** * Test the cache of the left operand of IN. ******************************************************************************/ # Test that default values of Cached_item are not used for comparison create table t1 (s1 int); create table t2 (s2 int); insert into t1 values (5),(1),(0); insert into t2 values (0), (1); select s2 from t2 where s2 in (select s1 from t1); s2 0 1 drop table t1, t2; create table t1 (a int not null, b int not null); create table t2 (c int not null, d int not null); create table t3 (e int not null); insert into t1 values (1,10); insert into t1 values (1,20); insert into t1 values (2,10); insert into t1 values (2,20); insert into t1 values (2,30); insert into t1 values (3,20); insert into t1 values (4,40); insert into t2 values (2,10); insert into t2 values (2,20); insert into t2 values (2,40); insert into t2 values (3,20); insert into t2 values (4,10); insert into t2 values (5,10); insert into t3 values (10); insert into t3 values (10); insert into t3 values (20); insert into t3 values (30); explain extended select a from t1 where a in (select c from t2 where d >= 20); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 6 100.00 1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where; Using join buffer (flat, BNL join) 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 6 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t1`.`a` = `test`.`t2`.`c` and `test`.`t2`.`d` >= 20 select a from t1 where a in (select c from t2 where d >= 20); a 2 2 2 3 create index it1a on t1(a); explain extended select a from t1 where a in (select c from t2 where d >= 20); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index it1a it1a 4 NULL 7 100.00 Using index 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 6 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`d` >= 20 select a from t1 where a in (select c from t2 where d >= 20); a 2 2 2 3 insert into t2 values (1,10); explain extended select a from t1 where a in (select c from t2 where d >= 20); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index it1a it1a 4 NULL 7 100.00 Using index 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 7 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`d` >= 20 select a from t1 where a in (select c from t2 where d >= 20); a 2 2 2 3 explain extended select a from t1 group by a having a in (select c from t2 where d >= 20); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using index 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 7 100.00 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#2 */ select `test`.`t2`.`c` from `test`.`t2` where `test`.`t2`.`d` >= 20 ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where `test`.`t1`.`a` = `<subquery2>`.`c`)))) select a from t1 group by a having a in (select c from t2 where d >= 20); a 2 3 create index iab on t1(a, b); explain extended select a from t1 group by a having a in (select c from t2 where d >= 20); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using index 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 7 100.00 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#2 */ select `test`.`t2`.`c` from `test`.`t2` where `test`.`t2`.`d` >= 20 ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where `test`.`t1`.`a` = `<subquery2>`.`c`)))) select a from t1 group by a having a in (select c from t2 where d >= 20); a 2 3 explain extended select a from t1 group by a having a in (select c from t2 where d >= some(select e from t3 where max(b)=e)); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL iab 8 NULL 7 100.00 Using index 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where 3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where Warnings: Note 1276 Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1 Note 1981 Aggregate function 'max()' of SELECT #3 belongs to SELECT #1 Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`,max(`test`.`t1`.`b`),max(`test`.`t1`.`b`)>(<in_optimizer>(`test`.`t1`.`a`,<exists>(/* select#2 */ select `test`.`t2`.`c` from `test`.`t2` where <nop>(<expr_cache><`test`.`t2`.`d`,`test`.`t1`.`b`,max(`test`.`t1`.`b`),max(`test`.`t1`.`b`)>(<in_optimizer>(`test`.`t2`.`d`,<exists>(/* select#3 */ select `test`.`t3`.`e` from `test`.`t3` where max(`test`.`t1`.`b`) = `test`.`t3`.`e` having <cache>(`test`.`t2`.`d`) >= <ref_null_helper>(`test`.`t3`.`e`))))) and <cache>(`test`.`t1`.`a`) = `test`.`t2`.`c`))) select a from t1 group by a having a in (select c from t2 where d >= some(select e from t3 where max(b)=e)); a 2 3 explain extended select a from t1 where a in (select c from t2 where d >= some(select e from t3 where b=e)); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 7 100.00 Start temporary 1 PRIMARY t1 ref it1a,iab iab 4 test.t2.c 1 100.00 Using where; Using index; End temporary 3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where Warnings: Note 1276 Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1 Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t1`.`a` = `test`.`t2`.`c` and <nop>(<expr_cache><`test`.`t2`.`d`,`test`.`t1`.`b`>(<in_optimizer>(`test`.`t2`.`d`,<exists>(/* select#3 */ select `test`.`t3`.`e` from `test`.`t3` where `test`.`t1`.`b` = `test`.`t3`.`e` and <cache>(`test`.`t2`.`d`) >= `test`.`t3`.`e`)))) select a from t1 where a in (select c from t2 where d >= some(select e from t3 where b=e)); a 2 2 2 3 1 drop table t1, t2, t3; create table t2 (a int, b int, key(a), key(b)); insert into t2 values (3,3),(3,3),(3,3); select 1 from t2 where t2.a > 1 or t2.a = 3 and not t2.a not in (select t2.b from t2); 1 1 1 1 drop table t2; create table t1 (a1 int key); create table t2 (b1 int); insert into t1 values (5); explain select min(a1) from t1 where 7 in (select max(b1) from t2 group by b1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 1 PRIMARY <subquery2> const distinct_key distinct_key 4 const 1 2 MATERIALIZED NULL NULL NULL NULL NULL NULL NULL no matching row in const table select min(a1) from t1 where 7 in (select max(b1) from t2 group by b1); min(a1) NULL set @save_optimizer_switch=@@optimizer_switch; set @@optimizer_switch=@optimizer_switch_local_default; set @@optimizer_switch='materialization=off,in_to_exists=on'; explain select min(a1) from t1 where 7 in (select max(b1) from t2 group by b1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE 2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL no matching row in const table select min(a1) from t1 where 7 in (select max(b1) from t2 group by b1); min(a1) NULL set @@optimizer_switch=@optimizer_switch_local_default; set @@optimizer_switch='semijoin=off'; explain select min(a1) from t1 where 7 in (select b1 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 2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL no matching row in const table select min(a1) from t1 where 7 in (select b1 from t2); min(a1) NULL set @@optimizer_switch=@optimizer_switch_local_default; set @@optimizer_switch='materialization=off,in_to_exists=on'; # with MariaDB and MWL#90, this particular case is solved: explain select min(a1) from t1 where 7 in (select b1 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 select min(a1) from t1 where 7 in (select b1 from t2); min(a1) NULL # but when we go around MWL#90 code, the problem still shows up: explain select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE 2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL no matching row in const table select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4; min(a1) NULL set @@optimizer_switch= @save_optimizer_switch; drop table t1,t2; create table t1 (a char(2), b varchar(10)); insert into t1 values ('a', 'aaa'); insert into t1 values ('aa', 'aaaa'); 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 PRIMARY t1 ALL NULL NULL NULL NULL 2 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 2 func 1 Using where 2 MATERIALIZED t1 ALL NULL NULL NULL NULL 2 select a,b from t1 where b in (select a from t1); a b prepare st1 from "select a,b from t1 where b in (select a from t1)"; execute st1; a b execute st1; a b drop table t1; # # BUG#49630: Segfault in select_describe() with double # nested subquery and materialization # CREATE TABLE t1 (t1i int); CREATE TABLE t2 (t2i int); CREATE TABLE t3 (t3i int); CREATE TABLE t4 (t4i int); INSERT INTO t1 VALUES (1); INSERT INTO t2 VALUES (1),(2); INSERT INTO t3 VALUES (1),(2); INSERT INTO t4 VALUES (1),(2); EXPLAIN SELECT t1i FROM t1 JOIN t4 ON t1i=t4i WHERE (t1i) IN ( SELECT t2i FROM t2 WHERE (t2i) IN ( SELECT max(t3i) FROM t3 GROUP BY t3i ) ); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 const 1 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) 1 PRIMARY t4 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) 3 MATERIALIZED t3 ALL NULL NULL NULL NULL 2 Using temporary DROP TABLE t1,t2,t3,t4; CREATE TABLE t1 ( pk INTEGER AUTO_INCREMENT, col_int_nokey INTEGER, col_int_key INTEGER, col_varchar_key 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 ) VALUES (2, NULL, 'w'), (9, 7, 'm'), (3, 9, 'm'), (9, 7, 'k'), (NULL, 4, 'r'), (9, 2, 't'), (3, 6, 'j'), (8, 8, 'u'), (8, NULL, 'h'), (53, 5, 'o'), (0, NULL, NULL), (5, 6, 'k'), (166, 188, 'e'), (3, 2, 'n'), (0, 1, 't'), (1, 1, 'c'), (9, 0, 'm'), (5, 9, 'y'), (6, NULL, 'f'), (2, 4, 'd') ; SELECT table2.col_varchar_key AS field1, table2.col_int_nokey AS field2 FROM ( t1 AS table1 LEFT OUTER JOIN t1 AS table2 ON (table2.col_varchar_key = table1.col_varchar_key ) ) WHERE table1.pk = 6 HAVING ( field2 ) IN ( SELECT SUBQUERY2_t2.col_int_nokey AS SUBQUERY2_field2 FROM ( t1 AS SUBQUERY2_t1 JOIN t1 AS SUBQUERY2_t2 ON (SUBQUERY2_t2.col_varchar_key = SUBQUERY2_t1.col_varchar_key ) ) ) ORDER BY field2 ; field1 field2 t 1 t 2 drop table t1; # # BUG#53103: MTR test ps crashes in optimize_cond() # when running with --debug # CREATE TABLE t1(track varchar(15)); INSERT INTO t1 VALUES ('CAD'), ('CAD'); PREPARE STMT FROM "SELECT 1 FROM t1 WHERE track IN (SELECT track FROM t1 GROUP BY track HAVING track>='CAD')"; EXECUTE STMT ; 1 1 1 EXECUTE STMT ; 1 1 1 DEALLOCATE PREPARE STMT; DROP TABLE t1; # End of BUG#53103 # # BUG#54511 - Assertion failed: cache != 0L in file # sql_select.cc::sub_select_cache on HAVING # CREATE TABLE t1 (i int(11)); CREATE TABLE t2 (c char(1)); CREATE TABLE t3 (c char(1)); INSERT INTO t1 VALUES (1), (2); INSERT INTO t2 VALUES ('a'), ('b'); INSERT INTO t3 VALUES ('x'), ('y'); SELECT COUNT( i ),i FROM t1 HAVING ('c') IN (SELECT t2.c FROM (t2 JOIN t3)); COUNT( i ) i DROP TABLE t1,t2,t3; # End BUG#54511 # # BUG#56367 - Assertion exec_method != EXEC_MATERIALIZATION... # on subquery in FROM # CREATE TABLE t1 (a INTEGER); CREATE TABLE t2 (b INTEGER); INSERT INTO t2 VALUES (1); set @tmp_optimizer_switch=@@optimizer_switch; set optimizer_switch='derived_merge=off,derived_with_keys=off'; explain SELECT a FROM ( SELECT t1.* FROM t1 LEFT JOIN t2 ON t1.a > 3 OR t2.b IN (SELECT a FROM t1) ) table1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 2 DERIVED NULL NULL NULL NULL NULL NULL NULL no matching row in const table 3 MATERIALIZED NULL NULL NULL NULL NULL NULL NULL no matching row in const table SELECT a FROM ( SELECT t1.* FROM t1 LEFT JOIN t2 ON t1.a > 3 OR t2.b IN (SELECT a FROM t1) ) table1; a set optimizer_switch=@tmp_optimizer_switch; DROP TABLE t1, t2; # End BUG#56367 # # Bug#59833 - materialization=on/off leads to different result set # when using IN # CREATE TABLE t1 ( pk int NOT NULL, f1 int DEFAULT NULL, PRIMARY KEY (pk) ) ENGINE=MyISAM; CREATE TABLE t2 ( pk int NOT NULL, f1 int DEFAULT NULL, PRIMARY KEY (pk) ) ENGINE=MyISAM; INSERT INTO t1 VALUES (10,0); INSERT INTO t2 VALUES (10,0),(11,0); explain SELECT * FROM t1 JOIN t2 USING (f1) WHERE t1.f1 IN (SELECT t1.pk FROM t1 ORDER BY t1.f1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 const 1 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) 2 MATERIALIZED t1 system NULL NULL NULL NULL 1 SELECT * FROM t1 JOIN t2 USING (f1) WHERE t1.f1 IN (SELECT t1.pk FROM t1 ORDER BY t1.f1); f1 pk pk DROP TABLE t1, t2; # End Bug#59833 # # Bug#11852644 - CRASH IN ITEM_REF::SAVE_IN_FIELD ON SELECT DISTINCT # CREATE TABLE t1 ( col_varchar_key varchar(1) DEFAULT NULL, col_varchar_nokey varchar(1) DEFAULT NULL, KEY col_varchar_key (col_varchar_key)) ; INSERT INTO t1 VALUES ('v','v'),('r','r'); CREATE TABLE t2 ( col_varchar_key varchar(1) DEFAULT NULL, col_varchar_nokey varchar(1) DEFAULT NULL, KEY col_varchar_key(col_varchar_key)) ; INSERT INTO t2 VALUES ('r','r'),('c','c'); CREATE VIEW v3 AS SELECT * FROM t2; SELECT DISTINCT alias2.col_varchar_key FROM t1 AS alias1 JOIN v3 AS alias2 ON alias2.col_varchar_key = alias1.col_varchar_key HAVING col_varchar_key IN (SELECT col_varchar_nokey FROM t2) ; col_varchar_key r DROP TABLE t1, t2; DROP VIEW v3; # End Bug#11852644 # Bug#12668294 - GROUP BY ON EMPTY RESULT GIVES EMPTY ROW # INSTEAD OF NULL WHEN MATERIALIZATION ON CREATE TABLE t1 (col_int_nokey INT) ENGINE=MEMORY; CREATE TABLE t2 (col_int_nokey INT) ENGINE=MEMORY; INSERT INTO t2 VALUES (8),(7); CREATE TABLE t3 (col_int_nokey INT) ENGINE=MEMORY; INSERT INTO t3 VALUES (7); SELECT MIN(t3.col_int_nokey),t1.col_int_nokey AS field3 FROM t3 LEFT JOIN t1 ON t1.col_int_nokey WHERE (194, 200) IN ( SELECT SQ4_alias1.col_int_nokey, SQ4_alias2.col_int_nokey FROM t2 AS SQ4_alias1 JOIN t2 AS SQ4_alias2 ON SQ4_alias2.col_int_nokey = 5 ) GROUP BY field3 ; MIN(t3.col_int_nokey) field3 DROP TABLE t1; DROP TABLE t2; DROP TABLE t3; 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); set @save_optimizer_switch=@@optimizer_switch; set @@optimizer_switch=@optimizer_switch_local_default; SET @@optimizer_switch='semijoin=on,materialization=on'; 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 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2); COUNT(*) 2 set @@optimizer_switch= @save_optimizer_switch; DROP TABLE t1, t2; 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'); set @save_optimizer_switch=@@optimizer_switch; set @@optimizer_switch=@optimizer_switch_local_default; SET @@optimizer_switch='semijoin=on,materialization=on'; 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 PRIMARY t1 ALL NULL NULL NULL NULL 2 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 2 MATERIALIZED t2 range PRIMARY PRIMARY 4 NULL 2 Using index condition; Using where; Rowid-ordered scan 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; set optimizer_switch=@save_optimizer_switch; # # BUG#50019: Wrong result for IN-subquery 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 1 2 3 4 set @save_optimizer_switch=@@optimizer_switch; set session optimizer_switch='materialization=off,in_to_exists=on'; 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 set session optimizer_switch=@save_optimizer_switch; drop table t1, t2, t3; create table t0 (a int); insert into t0 values (0),(1),(2); create table t1 (a int); insert into t1 values (0),(1),(2); explain select a, a in (select a from t1) from t0; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 3 2 MATERIALIZED t1 ALL NULL NULL NULL NULL 3 select a, a in (select a from t1) from t0; a a in (select a from t1) 0 1 1 1 2 1 prepare s from 'select a, a in (select a from t1) from t0'; execute s; a a in (select a from t1) 0 1 1 1 2 1 update t1 set a=123; execute s; a a in (select a from t1) 0 0 1 0 2 0 drop table t0, t1; set optimizer_switch='firstmatch=on'; # # MWL#90, review feedback: check what happens when the subquery # looks like candidate for MWL#90 checking at the first glance # but then subselect_hash_sj_engine::init_permanent() discovers # that it's not possible to perform duplicate removal for the # selected datatypes, and so materialization isn't applicable after # all. # 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)); 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))); explain select left(a1,7), left(a2,7) from t1_1024 where (a1,3) in (select substring(b1,1,1024), count(*) from t2_1024 where b1 > '0'); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where 2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 Using where select left(a1,7), left(a2,7) from t1_1024 where (a1,3) in (select substring(b1,1,1024), count(*) from t2_1024 where b1 > '0'); left(a1,7) left(a2,7) 1 - 01x 2 - 01x drop table t1_1024, t2_1024; # # BUG##836491: Crash in Item_field::Item_field from add_ref_to_table_cond() with semijoin+materialization # CREATE TABLE t1 (c int, d varchar(1), KEY(d)) ; INSERT INTO t1 VALUES (2,'x'),(2,'x'),(2,'j'),(2,'c'); CREATE TABLE t2 (a int, d varchar(1)) ; INSERT INTO t2 VALUES (1,'x'); CREATE TABLE t3 (d varchar(1)) ; INSERT INTO t3 VALUES ('x'),('x'),('j'),('c'); SELECT t2.a, t1.c FROM t1, t2 WHERE t2.d IN ( SELECT d FROM t3 ) AND t1.d = t2.d GROUP BY 1 , 2; a c 1 2 drop table t1,t2,t3; # # BUG#836523: Crash in JOIN::get_partial_cost_and_fanout with semijoin+materialization # CREATE TABLE t1 (a varchar(1)); INSERT INTO t1 VALUES ('a'),('a'); CREATE TABLE t2 (a varchar(1)); CREATE TABLE t3 (a int); INSERT INTO t3 VALUES (1),(2); CREATE TABLE t4 (a varchar(1)); INSERT INTO t4 VALUES ('a'),('a'); SELECT t1.a FROM t1 WHERE t1.a IN ( SELECT t2.a FROM t2, t3 ) HAVING a IN ( SELECT a FROM t4 ); a DROP TABLE t1, t2, t3, t4; # # BUG#836507: Crash in setup_sj_materialization_part1() with semijoin+materialization # CREATE TABLE t1 (a int) ; INSERT IGNORE INTO t1 VALUES (1),(1); CREATE TABLE t2 (a int); INSERT INTO t2 VALUES (1); CREATE TABLE t3 (a int); CREATE TABLE t4 (a int); INSERT INTO t4 VALUES (2),(2); CREATE TABLE t5 (a int); INSERT INTO t5 VALUES (1); SELECT * FROM t1 WHERE (a) IN ( SELECT t5.a FROM ( t2 LEFT JOIN ( t3 , t4 ) ON 1 = 1 ) JOIN t5 ); a 1 1 DROP TABLE t1,t2,t3,t4,t5; # # BUG#836532: Crash in Item_equal_fields_iterator::get_curr_field with semijoin+materialization # CREATE TABLE t2 (a int); INSERT IGNORE INTO t2 VALUES ('a'),('a'); Warnings: Warning 1366 Incorrect integer value: 'a' for column `test`.`t2`.`a` at row 1 Warning 1366 Incorrect integer value: 'a' for column `test`.`t2`.`a` at row 2 CREATE TABLE t4 (a varchar(1)); INSERT INTO t4 VALUES ('m'),('o'); CREATE TABLE t3 (a varchar(1) , b varchar(1) ) ; INSERT INTO t3 VALUES ('b','b'); CREATE TABLE t5 (a varchar(1), KEY (a)) ; INSERT INTO t5 VALUES ('d'),('e'); SELECT * FROM t2 WHERE t2.a = ALL ( SELECT t4.a FROM t4 WHERE t4.a IN ( SELECT t3.a FROM t3 , t5 WHERE ( t5.a = t3.b ) ) ); a 0 0 DROP TABLE t2,t3,t4,t5; # # BUG#860300: Second crash with get_fanout_with_deps() with semijoin + materialization # set @tmp_860300=@@optimizer_switch; set optimizer_switch='semijoin=on,materialization=on,loosescan=off,firstmatch=off'; CREATE TABLE t1 (f2 int); INSERT INTO t1 VALUES (9),(6); CREATE TABLE t3 (f4 int); CREATE TABLE t4 (f6 varchar(1)); SELECT * FROM t3 WHERE 'h' IN (SELECT f6 FROM t4 WHERE 5 IN (SELECT f2 FROM t1) GROUP BY t4.f6); f4 DROP TABLE t1,t3,t4; set optimizer_switch=@tmp_860300; # # BUG#860535: Assertion `keypart_map' failed in mi_rkey with semijoin # set @tmp_860535=@@optimizer_switch; set optimizer_switch='semijoin=on,materialization=on,loosescan=off,firstmatch=off'; CREATE TABLE t1 (f3 int) ; INSERT INTO t1 VALUES (1),(7); CREATE TABLE t2 (f3 int , f5 varchar(1), KEY (f3)) ; INSERT INTO t2 VALUES (7,'b'); CREATE TABLE t3 (f3 int , f4 varchar(1) , KEY(f3), KEY (f4,f3)) ; INSERT INTO t3 VALUES (1,'t'),(7,'g'); CREATE TABLE t4 SELECT f3 FROM t1 WHERE ( f3 ) NOT IN ( SELECT f3 FROM t2 WHERE f5 IN ( SELECT f4 FROM t3 WHERE t3.f3 < 3 ) ); SELECT * FROM t4; f3 1 7 DROP TABLE t1, t2, t3, t4; set optimizer_switch=@tmp_860535; # # BUG#860553: Crash in create_ref_for_key with semijoin + materialization # CREATE TABLE t1 (f1 int) ; CREATE TABLE t2 (f5 varchar(52) NOT NULL) ; CREATE TABLE t3 (f1 varchar(3), f4 varchar(52) , KEY (f4), PRIMARY KEY (f1)); CREATE TABLE t4 (f3 int, KEY (f3)); INSERT INTO t4 VALUES (17),(20); CREATE TABLE t5 (f2 int); INSERT INTO t5 VALUES (0),(0); SELECT * FROM t1 JOIN t2 ON ( t2.f5 ) IN ( SELECT t3.f4 FROM t3 WHERE ( 1 ) IN ( SELECT t4.f3 FROM t4 , t5 ) ); f1 f5 DROP TABLE t1, t2, t3, t4, t5; # # BUG#868908: Crash in check_simple_equality() with semijoin + materialization + prepared statement # CREATE TABLE t1 ( a int ); CREATE TABLE t3 ( b int, c int) ; CREATE TABLE t2 ( a int ) ; CREATE TABLE t4 ( a int , c int) ; PREPARE st1 FROM " SELECT STRAIGHT_JOIN * FROM t1 WHERE ( 3 ) IN ( SELECT t3.b FROM t3 LEFT JOIN ( t2 STRAIGHT_JOIN t4 ON ( t4.c = t2.a ) ) ON ( t4.a = t3.c ) ); "; EXECUTE st1; a EXECUTE st1; a DROP TABLE t1,t2,t3,t4; # # BUG#901032: Wrong result for MIN/MAX on an indexed column with materialization and semijoin # CREATE TABLE t1 ( a INT, KEY(a) ); INSERT INTO t1 VALUES (1); CREATE TABLE t2 ( b INT ); INSERT INTO t2 VALUES (2); CREATE TABLE t3 ( c INT ); INSERT INTO t3 VALUES (2); SELECT MIN(a) FROM t1, t2 WHERE b IN (SELECT c FROM t3 GROUP BY c); MIN(a) 1 DROP TABLE t1,t2,t3; # # # BUG#902632: Crash or invalid read at st_join_table::cleanup, st_table::disable_keyread # CREATE TABLE t1 ( a INT ); INSERT INTO t1 VALUES (1), (2); CREATE TABLE t2 ( b INT ); INSERT INTO t2 VALUES (3), (4); CREATE TABLE t3 ( c INT ); INSERT INTO t3 VALUES (5), (6); SELECT * FROM t1 WHERE EXISTS ( SELECT DISTINCT b FROM t2 WHERE b <= a AND b IN ( SELECT c FROM t3 GROUP BY c ) ); a DROP TABLE t1,t2,t3; # # BUG#901506: Crash in TABLE_LIST::print on EXPLAIN EXTENDED # CREATE TABLE t1 ( a INT, KEY(a) ); INSERT INTO t1 VALUES (8); EXPLAIN EXTENDED SELECT * FROM t1 WHERE a IN ( SELECT MIN(a) FROM t1 ); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 system a NULL NULL NULL 1 100.00 1 PRIMARY <subquery2> system NULL NULL NULL NULL 1 100.00 2 MATERIALIZED NULL NULL NULL NULL NULL NULL NULL NULL Select tables optimized away Warnings: Note 1003 /* select#1 */ select 8 AS `a` from dual where 1 DROP TABLE t1; # # BUG#904432: Wrong result with LEFT JOIN, constant table, semijoin=ON,materialization=ON # CREATE TABLE t1 ( a INT ) ENGINE=MyISAM; INSERT INTO t1 VALUES (4); CREATE TABLE t2 ( b INT NOT NULL, c INT ); INSERT INTO t2 VALUES (4,2),(4,2),(4,4),(1,1); SELECT * FROM t1 LEFT JOIN t2 ON ( a = b ) WHERE a IN ( SELECT c FROM t2 ); a b c 4 4 2 4 4 2 4 4 4 DROP TABLE t1,t2; # # BUG#922254: Assertion `0' failed at item_cmpfunc.cc:5899: Item* Item_equal::get_first(JOIN_TAB*, Item*) # CREATE TABLE t1 ( a VARCHAR(3) ); CREATE TABLE t2 ( b VARCHAR(3), c VARCHAR(8), KEY(c) ); INSERT INTO t2 VALUES ('USA','Abilene'),('USA','Akron'); EXPLAIN SELECT * FROM ( SELECT * FROM t1 ) AS alias1, t2 AS alias2 WHERE b = a AND a IN ( SELECT alias3.c FROM t2 AS alias3, t2 AS alias4 WHERE alias4.c = alias3.b ); 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 DROP TABLE t1,t2; # # BUG#928048: Query containing IN subquery with OR in the where clause returns a wrong result # create table t1 (a int, b int); insert into t1 values (7,5), (3,3), (5,4), (9,3); create table t2 (a int, b int, index i_a(a)); insert into t2 values (4,2), (7,9), (7,4), (3,1), (5,3), (3,1), (9,4), (8,1); explain select * from t1 where t1.a in (select a from t2 where t2.a=7 or t2.b<=1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 2 MATERIALIZED t2 ALL i_a NULL NULL NULL 8 Using where select * from t1 where t1.a in (select a from t2 where t2.a=7 or t2.b<=1); a b 7 5 3 3 drop table t1,t2; # # BUG#933407: Valgrind warnings in mark_as_null_row with materialization+semijoin, STRAIGHT_JOIN, impossible WHERE # CREATE TABLE t1 (a INT); INSERT INTO t1 VALUES (0),(8); SELECT STRAIGHT_JOIN MIN(a) FROM t1 WHERE a IN ( SELECT a FROM t1 WHERE 'condition'='impossible' ); MIN(a) NULL DROP TABLE t1; # # BUG#938131: Subquery materialization is not used in CREATE TABLE SELECT # CREATE TABLE t1(a int); INSERT INTO t1 values(1),(2); CREATE TABLE t2(a int); INSERT INTO t2 values(1),(2); # Should use Materialization: EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT * FROM t2 GROUP BY a HAVING a > 1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 test.t1.a 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 Using temporary flush status; CREATE TABLE t3 SELECT * FROM t1 WHERE a IN (SELECT * FROM t2 GROUP BY a HAVING a > 1); SHOW STATUS LIKE 'Created_tmp_tables'; Variable_name Value Created_tmp_tables 2 DROP TABLE t1,t2,t3; # # BUG#939009: Crash with aggregate function in IN subquery # SET @save_optimizer_switch=@@optimizer_switch; SET optimizer_switch='materialization=on,semijoin=on'; CREATE TABLE t1 (a int, b int); INSERT INTO t1 VALUES (7,1), (4,2), (7,7); CREATE TABLE t2 ( c INT ); INSERT INTO t2 VALUES (4), (7), (6); EXPLAIN EXTENDED SELECT * FROM t1 WHERE a IN (SELECT MAX(c) FROM t2) AND b=7 AND (a IS NULL OR a=b); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <subquery2> const distinct_key distinct_key 4 const 1 100.00 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 100.00 Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from <materialize> (/* select#2 */ select max(`test`.`t2`.`c`) from `test`.`t2`) join `test`.`t1` where `test`.`t1`.`b` = 7 and `test`.`t1`.`a` = `<subquery2>`.`MAX(c)` and (<cache>(/*always not null*/ 1 is null) or `<subquery2>`.`MAX(c)` = 7) SELECT * FROM t1 WHERE a IN (SELECT MAX(c) FROM t2) AND b=7 AND (a IS NULL OR a=b); a b 7 7 EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT MAX(c) FROM t2 WHERE c < 4) AND b=7 AND (a IS NULL OR a=b); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <subquery2> const distinct_key distinct_key 4 const 1 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where SELECT * FROM t1 WHERE a IN (SELECT MAX(c) FROM t2 WHERE c < 4) AND b=7 AND (a IS NULL OR a=b); a b SET optimizer_switch=@save_optimizer_switch; DROP TABLE t1,t2; # # BUG#946055: Crash with semijoin IN subquery when hash join is used # CREATE TABLE t1 (a int); INSERT INTO t1 VALUES (7); CREATE TABLE t2 (b int, c int, d varchar(1), e varchar(1), KEY (c), KEY (d, c)); INSERT INTO t2 VALUES (4,2,'v','v'), (6,1,'v','v'), (0,5,'x','x'), (7,1,'x','x'), (7,3,'i','i'), (7,1,'e','e'), (1,4,'p','p'), (1,2,'j','j'); SET @save_optimizer_switch=@@optimizer_switch; SET @save_join_cache_level=@@join_cache_level; SET join_cache_level=2; EXPLAIN SELECT a, c FROM t1, t2 WHERE (a, c) IN (SELECT s1.b, s1.c FROM t2 AS s1, t2 AS s2 WHERE s2.d = s1.e AND s1.e = (SELECT MAX(e) FROM t2)); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 1 PRIMARY t2 index c c 5 NULL 8 Using index 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1 2 MATERIALIZED s2 ref d d 4 const 2 Using where; Using index 2 MATERIALIZED s1 ALL c NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join) 3 SUBQUERY t2 ALL NULL NULL NULL NULL 8 SELECT a, c FROM t1, t2 WHERE (a, c) IN (SELECT s1.b, s1.c FROM t2 AS s1, t2 AS s2 WHERE s2.d = s1.e AND s1.e = (SELECT MAX(e) FROM t2)); a c 7 1 7 1 7 1 SET optimizer_switch='join_cache_hashed=on'; SET join_cache_level=4; EXPLAIN SELECT a, c FROM t1, t2 WHERE (a, c) IN (SELECT s1.b, s1.c FROM t2 AS s1, t2 AS s2 WHERE s2.d = s1.e AND s1.e = (SELECT MAX(e) FROM t2)); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 1 PRIMARY t2 index c c 5 NULL 8 Using index 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1 2 MATERIALIZED s2 ref d d 4 const 2 Using where; Using index 2 MATERIALIZED s1 hash_ALL c #hash#$hj 5 const 8 Using where; Using join buffer (flat, BNLH join) 3 SUBQUERY t2 ALL NULL NULL NULL NULL 8 SELECT a, c FROM t1, t2 WHERE (a, c) IN (SELECT s1.b, s1.c FROM t2 AS s1, t2 AS s2 WHERE s2.d = s1.e AND s1.e = (SELECT MAX(e) FROM t2)); a c 7 1 7 1 7 1 SET optimizer_switch=@save_optimizer_switch; SET join_cache_level=@save_join_cache_level; DROP TABLE t1,t2; # # BUG#952297: Server crashes on 2nd execution of PS in Field::is_null with semijoin+materialization # CREATE TABLE t1 ( a VARCHAR(1) ); INSERT INTO t1 VALUES ('y'),('z'); CREATE TABLE t2 ( b VARCHAR(1), c VARCHAR(1) ); INSERT INTO t2 VALUES ('v','v'),('v','v'); CREATE VIEW v2 AS SELECT * FROM t2; PREPARE ps FROM ' SELECT a FROM t1, v2 WHERE ( c, b ) IN ( SELECT b, b FROM t2 ) GROUP BY a '; EXECUTE ps; a y z EXECUTE ps; a y z DROP VIEW v2; DROP TABLE t1, t2; # # BUG#1000269: Wrong result (extra rows) with semijoin+materialization, IN subqueries, join_cache_level>0 # CREATE TABLE t1 (a1 VARCHAR(1), a2 VARCHAR(1)) ENGINE=MyISAM; INSERT INTO t1 VALUES ('b','b'),('e','e'); CREATE TABLE t2 (b1 VARCHAR(1), b2 VARCHAR(1), KEY(b1)) ENGINE=MyISAM; INSERT INTO t2 VALUES ('v','v'),('s','s'),('l','l'), ('y','y'),('c','c'),('i','i'); SELECT * FROM t1, t2 WHERE b1 IN ( SELECT b2 FROM t2 WHERE b1 > 'o' ) AND ( b1 < 'l' OR a1 IN ('b','c') ); a1 a2 b1 b2 b b v v b b s s b b y y DROP TABLE t1,t2; # # MDEV-4465: Reproducible crash (mysqld got signal 11) in multi_delete::initialize_tables with semijoin+materialization # CREATE TABLE t1 ( id int(11) NOT NULL ); CREATE TABLE t2 ( id int(11) NOT NULL, a_id int(11) DEFAULT NULL ); insert into t1 values (1), (2), (3); insert into t2 values (1, 1), (2, 1), (3, 1), (4, 2), (5, 3), (6, 3), (7, 3); delete t2 from t2 where a_id in (select * from (select t1.id from t1 limit 2) as x); drop table t1,t2; # This must be at the end: set optimizer_switch=@subselect_sj_mat_tmp; set join_cache_level=@save_join_cache_level; # # MDEV-4908: Assertion `((Item_cond *) cond)->functype() == # ((Item_cond *) new_item)->functype()' fails on a query with # IN and equal conditions, AND/OR, materialization+semijoin # SET @save_optimizer_switch=@@optimizer_switch; SET optimizer_switch = 'materialization=on,semijoin=on'; CREATE TABLE t1 (pk INT, a INT, b INT, PRIMARY KEY(pk)) ENGINE=MyISAM; INSERT INTO t1 VALUES (1,3,5),(2,4,6); SELECT * FROM t1 WHERE 8 IN ( SELECT MIN(pk) FROM t1 ) AND ( pk = a OR pk = b ); pk a b drop table t1; SET optimizer_switch=@save_optimizer_switch; # # MDEV-5011: ERROR Plugin 'MEMORY' has ref_count=1 after shutdown for SJM queries # CREATE TABLE t1 (pk INT, a INT, b INT, PRIMARY KEY(pk)) ENGINE=MyISAM; INSERT INTO t1 VALUES (1,3,5),(2,4,6); SELECT * FROM t1 WHERE 8 IN (SELECT MIN(pk) FROM t1) AND (pk = a OR pk = b); pk a b DROP TABLE t1; # # MDEV-5368: Server crashes in Item_in_subselect::optimize on 2nd # execution of PS with IN subqueries, materialization+semijoin # CREATE TABLE t1 (a INT) ENGINE=MyISAM; INSERT INTO t1 VALUES (1),(3); CREATE TABLE t2 (b INT) ENGINE=MyISAM; CREATE ALGORITHM=MERGE VIEW v2 AS SELECT * FROM t2; INSERT INTO t2 VALUES (8),(9); PREPARE stmt FROM " SELECT * FROM t1 WHERE 1 IN ( SELECT b FROM v2 WHERE 2 IN ( SELECT MAX(a) FROM t1 ) ) "; EXECUTE stmt; a EXECUTE stmt; a DROP TABLE t1, t2; DROP VIEW v2; # # MDEV-5811: Server crashes in best_access_path with materialization+semijoin and big_tables=ON # SET @tmp_mdev5811= @@big_tables; SET big_tables = ON; CREATE TABLE t1 (a INT); INSERT INTO t1 VALUES (1),(2); CREATE TABLE t2 (b INT); INSERT INTO t2 VALUES (3),(4); SELECT * FROM t1 AS t1_1, t1 AS t1_2 WHERE ( t1_1.a, t1_2.a ) IN ( SELECT MAX(b), MIN(b) FROM t2 ); a a DROP TABLE t1,t2; SET big_tables=@tmp_mdev5811; # End of 5.3 tests # # MDEV-5056: Wrong result (extra rows) with materialization+semijoin, IN subqueries # set @tmp_mdev5056=@@join_cache_level; SET join_cache_level = 2; CREATE TABLE t1 ( c1 VARCHAR(2), c2 VARCHAR(2), INDEX(c1) ) ENGINE=MyISAM; INSERT INTO t1 VALUES ('JP','OM'),('VA','JP'),('CA','ML'),('ML','EG'),('DK','CA'), ('DK','QA'),('YE','PL'),('TR','ZW'),('DK','SK'),('SK','DK'), ('RO','ML'),('ML','BG'),('BG','ZW'),('ZW','GE'),('GE','JP'), ('PL','EG'),('QA','YE'),('WF','DK'),('DK','JP'),('EG','OM'); CREATE TABLE t2 ( c3 VARCHAR(2), c4 VARCHAR(2) ) ENGINE=MyISAM; INSERT INTO t2 VALUES ('CA','ML'),('IN','HU'),('HU','IN'); SELECT * FROM t1 AS alias1, t1 AS alias2 WHERE ( alias2.c2, alias1.c1 ) IN ( SELECT c4, c3 FROM t2 ) AND alias1.c1 IN ( SELECT c2 FROM t1 ); c1 c2 c1 c2 CA ML CA ML CA ML RO ML DROP TABLE t1,t2; set join_cache_level=@tmp_mdev5056; # # MDEV-5368: Server crashes in Item_in_subselect::optimize on 2nd # execution of PS with IN subqueries, materialization+semijoin # CREATE TABLE t1 (a INT) ENGINE=MyISAM; INSERT INTO t1 VALUES (1),(3); CREATE TABLE t2 (b INT) ENGINE=MyISAM; CREATE ALGORITHM=MERGE VIEW v2 AS SELECT * FROM t2; INSERT INTO t2 VALUES (8),(9); PREPARE stmt FROM " SELECT * FROM t1 WHERE 1 IN ( SELECT b FROM v2 WHERE 2 IN ( SELECT MAX(a) FROM t1 ) ) "; EXECUTE stmt; a EXECUTE stmt; a DROP TABLE t1, t2; DROP VIEW v2; # # MDEV-6289 : Unexpected results when querying information_schema # CREATE TABLE t1 ( id int(11) unsigned NOT NULL AUTO_INCREMENT, db varchar(254) NOT NULL DEFAULT '', PRIMARY KEY (id), UNIQUE KEY db (db) ) DEFAULT CHARSET=utf8; INSERT INTO t1 (db) VALUES ('mysqltest1'),('mysqltest2'),('mysqltest3'),('mysqltest4'); drop database if exists mysqltest1; drop database if exists mysqltest2; drop database if exists mysqltest3; drop database if exists mysqltest4; create database mysqltest1; create database mysqltest2; create database mysqltest3; create database mysqltest4; SELECT db FROM t1 WHERE db IN (SELECT SCHEMA_NAME FROM information_schema.schemata) ORDER BY db DESC; db mysqltest4 mysqltest3 mysqltest2 mysqltest1 EXPLAIN EXTENDED SELECT db FROM t1 WHERE db IN (SELECT SCHEMA_NAME FROM information_schema.schemata) ORDER BY db DESC; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2 100.00 Using temporary; Using filesort 1 PRIMARY t1 eq_ref db db 764 information_schema.schemata.SCHEMA_NAME 1 100.00 Using where; Using index 2 MATERIALIZED schemata ALL NULL NULL NULL NULL NULL NULL Warnings: Note 1003 select `test`.`t1`.`db` AS `db` from `test`.`t1` semi join (`information_schema`.`schemata`) where `test`.`t1`.`db` = `information_schema`.`schemata`.`SCHEMA_NAME` order by `test`.`t1`.`db` desc drop table t1; drop database mysqltest1; drop database mysqltest2; drop database mysqltest3; drop database mysqltest4; # # MDEV-7810 Wrong result on execution of a query as a PS # (both 1st and further executions) CREATE TABLE t1 (a INT NOT NULL) ENGINE=MyISAM; INSERT INTO t1 VALUES (0),(8); SELECT a FROM (SELECT DISTINCT * FROM t1) AS sq WHERE a IN (SELECT MIN(t2.a) FROM (t1 AS t2)); a 0 PREPARE stmt FROM " SELECT a FROM (SELECT DISTINCT * FROM t1) AS sq WHERE a IN (SELECT MIN(t2.a) FROM (t1 AS t2)) "; execute stmt; a 0 execute stmt; a 0 drop table t1; # # MDEV-12429: IN subquery used in WHERE of EXISTS subquery # CREATE TABLE t1 ( pk INT, f1 INT NOT NULL, f2 VARCHAR(3), f3 INT NULL, PRIMARY KEY(pk)) ENGINE=MyISAM; INSERT INTO t1 VALUES (1,1,'foo',8), (2,5,'bar',7); SELECT sq1.f2 FROM t1 AS sq1 WHERE EXISTS ( SELECT * FROM t1 AS sq2 WHERE sq1.`pk` IN ( SELECT f1 FROM t1 ) AND sq2.f1 = sq1.f1 ); f2 foo set @save_optimizer_switch= @@optimizer_switch; set optimizer_switch='exists_to_in=off'; EXPLAIN SELECT sq1.f2 FROM t1 AS sq1 WHERE EXISTS ( SELECT * FROM t1 AS sq2 WHERE sq1.`pk` IN ( SELECT f1 FROM t1 ) AND sq2.f1 = sq1.f1 ); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY sq1 ALL NULL NULL NULL NULL 2 Using where 2 DEPENDENT SUBQUERY <subquery3> eq_ref distinct_key distinct_key 4 func 1 2 DEPENDENT SUBQUERY sq2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) 3 MATERIALIZED t1 ALL NULL NULL NULL NULL 2 # this checks the result set above set optimizer_switch= 'materialization=off,semijoin=off'; SELECT sq1.f2 FROM t1 AS sq1 WHERE EXISTS ( SELECT * FROM t1 AS sq2 WHERE sq1.`pk` IN ( SELECT f1 FROM t1 ) AND sq2.f1 = sq1.f1 ); f2 foo set optimizer_switch= @save_optimizer_switch; DROP TABLE t1; # # MDEV-12145: IN subquery used in WHERE of EXISTS subquery # CREATE TABLE t1 (f1 INT) ENGINE=MyISAM; INSERT INTO t1 VALUES (4),(6); CREATE TABLE t2 (i2 INT, KEY(i2)) ENGINE=MyISAM; INSERT INTO t2 VALUES (8),(7),(1); CREATE TABLE t3 (f3 INT, i3 INT, KEY(i3)) ENGINE=MyISAM; INSERT INTO t3 VALUES (8,0),(6,3),(2,8),(3,8),(1,6),(0,0),(1,0),(1,5); set @save_optimizer_switch= @@optimizer_switch; set optimizer_switch='exists_to_in=off'; SELECT * FROM t1 WHERE EXISTS ( SELECT * FROM t2, t3 WHERE i3 = i2 AND f1 IN ( SELECT f3 FROM t3 ) ); f1 6 EXPLAIN EXTENDED SELECT * FROM t1 WHERE EXISTS ( SELECT * FROM t2, t3 WHERE i3 = i2 AND f1 IN ( SELECT f3 FROM t3 ) ); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 Using where 2 DEPENDENT SUBQUERY <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00 2 DEPENDENT SUBQUERY t2 index i2 i2 5 NULL 3 100.00 Using where; Using index; Using join buffer (flat, BNL join) 2 DEPENDENT SUBQUERY t3 ref i3 i3 5 test.t2.i2 2 100.00 Using index 3 MATERIALIZED t3 ALL NULL NULL NULL NULL 8 100.00 Warnings: Note 1276 Field or reference 'test.t1.f1' of SELECT #2 was resolved in SELECT #1 Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1` from `test`.`t1` where <expr_cache><`test`.`t1`.`f1`>(exists(/* select#2 */ select 1 from `test`.`t2` semi join (`test`.`t3`) join `test`.`t3` where `test`.`t3`.`i3` = `test`.`t2`.`i2` and `test`.`t1`.`f1` = `test`.`t3`.`f3`)) # this checks the result set above set optimizer_switch= 'materialization=off,semijoin=off'; SELECT * FROM t1 WHERE EXISTS ( SELECT * FROM t2, t3 WHERE i3 = i2 AND f1 IN ( SELECT f3 FROM t3 ) ); f1 6 set optimizer_switch= @save_optimizer_switch; DROP TABLE t1,t2,t3; # # MDEV-9686: IN subquery used in WHERE of a subquery from select list # CREATE TABLE t1 (pk INT PRIMARY KEY, f1 INT); INSERT INTO t1 VALUES (1, 4),(2, 3),(3, 3),(4, 6),(5, 3); CREATE TABLE t2 (f2 INT); INSERT INTO t2 VALUES (1),(2),(3),(4),(5); # t1.pk is always IN ( SELECT f2 FROM t2 ), # so the IN condition should be true for every row, # and thus COUNT(*) should always return 5 SELECT pk, f1, ( SELECT COUNT(*) FROM t2 WHERE t1.pk IN ( SELECT f2 FROM t2 ) ) AS sq FROM t1; pk f1 sq 1 4 5 2 3 5 3 3 5 4 6 5 5 3 5 EXPLAIN EXTENDED SELECT pk, f1, ( SELECT COUNT(*) FROM t2 WHERE t1.pk IN ( SELECT f2 FROM t2 ) ) AS sq FROM t1; 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 2 DEPENDENT SUBQUERY <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using join buffer (flat, BNL join) 3 MATERIALIZED t2 ALL NULL NULL NULL NULL 5 100.00 Warnings: Note 1276 Field or reference 'test.t1.pk' of SELECT #2 was resolved in SELECT #1 Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk`,`test`.`t1`.`f1` AS `f1`,<expr_cache><`test`.`t1`.`pk`>((/* select#2 */ select count(0) from `test`.`t2` semi join (`test`.`t2`) where `test`.`t1`.`pk` = `test`.`t2`.`f2`)) AS `sq` from `test`.`t1` # this checks the result set above set @save_optimizer_switch= @@optimizer_switch; set optimizer_switch= 'materialization=off,semijoin=off'; SELECT pk, f1, ( SELECT COUNT(*) FROM t2 WHERE t1.pk IN ( SELECT f2 FROM t2 ) ) AS sq FROM t1; pk f1 sq 1 4 5 2 3 5 3 3 5 4 6 5 5 3 5 set optimizer_switch= @save_optimizer_switch; DROP TABLE t1,t2; # # mdev-12838: scan of materialized of semi-join subquery in join # set @save_optimizer_switch=@@optimizer_switch; CREATE TABLE t1 ( dispatch_group varchar(32), assignment_group varchar(32), sys_id char(32), PRIMARY KEY (sys_id), KEY idx1 (dispatch_group), KEY idx2 (assignment_group) ) ENGINE=MyISAM; CREATE TABLE t2 ( ugroup varchar(32), user varchar(32), sys_id char(32), PRIMARY KEY (sys_id), KEY idx3 (ugroup), KEY idx4 (user) ) ENGINE=MyISAM; CREATE TABLE t3 ( type mediumtext, sys_id char(32), PRIMARY KEY (sys_id) ) ENGINE=MyISAM; set optimizer_switch='materialization=off'; explain SELECT t1.assignment_group FROM t1, t3 WHERE t1.assignment_group = t3.sys_id AND t1.dispatch_group IN (SELECT t2.ugroup FROM t2, t3 t3_i WHERE t2.ugroup = t3_i.sys_id AND t3_i.type LIKE '59e22fb137032000158bbfc8bcbe5d52' AND t2.user = '86826bf03710200044e0bfc8bcbe5d79'); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ref idx3,idx4 idx4 35 const 2 Using index condition; Using where; Start temporary 1 PRIMARY t3_i eq_ref PRIMARY PRIMARY 32 test.t2.ugroup 1 Using index condition; Using where 1 PRIMARY t1 ref idx1,idx2 idx1 35 test.t3_i.sys_id 2 Using index condition; Using where; End temporary 1 PRIMARY t3 eq_ref PRIMARY PRIMARY 32 test.t1.assignment_group 1 Using where; Using index SELECT t1.assignment_group FROM t1, t3 WHERE t1.assignment_group = t3.sys_id AND t1.dispatch_group IN (SELECT t2.ugroup FROM t2, t3 t3_i WHERE t2.ugroup = t3_i.sys_id AND t3_i.type LIKE '59e22fb137032000158bbfc8bcbe5d52' AND t2.user = '86826bf03710200044e0bfc8bcbe5d79'); assignment_group df50316637232000158bbfc8bcbe5d23 e08fad2637232000158bbfc8bcbe5d39 ec70316637232000158bbfc8bcbe5d60 7b10fd2637232000158bbfc8bcbe5d30 ebb4620037332000158bbfc8bcbe5d89 set optimizer_switch='materialization=on'; explain SELECT t1.assignment_group FROM t1, t3 WHERE t1.assignment_group = t3.sys_id AND t1.dispatch_group IN (SELECT t2.ugroup FROM t2, t3 t3_i WHERE t2.ugroup = t3_i.sys_id AND t3_i.type LIKE '59e22fb137032000158bbfc8bcbe5d52' AND t2.user = '86826bf03710200044e0bfc8bcbe5d79'); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2 1 PRIMARY t1 ref idx1,idx2 idx1 35 test.t2.ugroup 2 Using where 1 PRIMARY t3 eq_ref PRIMARY PRIMARY 32 test.t1.assignment_group 1 Using where; Using index 2 MATERIALIZED t2 ref idx3,idx4 idx4 35 const 2 Using index condition; Using where 2 MATERIALIZED t3_i eq_ref PRIMARY PRIMARY 32 test.t2.ugroup 1 Using index condition; Using where SELECT t1.assignment_group FROM t1, t3 WHERE t1.assignment_group = t3.sys_id AND t1.dispatch_group IN (SELECT t2.ugroup FROM t2, t3 t3_i WHERE t2.ugroup = t3_i.sys_id AND t3_i.type LIKE '59e22fb137032000158bbfc8bcbe5d52' AND t2.user = '86826bf03710200044e0bfc8bcbe5d79'); assignment_group df50316637232000158bbfc8bcbe5d23 e08fad2637232000158bbfc8bcbe5d39 ec70316637232000158bbfc8bcbe5d60 7b10fd2637232000158bbfc8bcbe5d30 ebb4620037332000158bbfc8bcbe5d89 DROP TABLE t1,t2,t3; set optimizer_switch=@save_optimizer_switch; # # MDEV-16751: Server crashes in st_join_table::cleanup or # TABLE_LIST::is_with_table_recursive_reference with join_cache_level>2 # set @save_join_cache_level= @@join_cache_level; set join_cache_level=4; CREATE TABLE t1 ( id int NOT NULL); INSERT INTO t1 VALUES (11),(12),(13),(14),(15),(16),(17),(18),(19); CREATE TABLE t2 (i1 int NOT NULL, i2 int NOT NULL) ; INSERT INTO t2 VALUES (11,11),(12,12),(13,13); explain SELECT 1 FROM t1 where t1.id IN (SELECT t2.i1 FROM t2 WHERE t2.i1 = t2.i2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 1 PRIMARY t1 hash_ALL NULL #hash#$hj 4 test.t2.i1 9 Using where; Using join buffer (flat, BNLH join) 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where SELECT 1 FROM t1 where t1.id IN (SELECT t2.i1 FROM t2 WHERE t2.i1 = t2.i2); 1 1 1 1 set @@join_cache_level= @save_join_cache_level; alter table t1 add key(id); explain SELECT 1 FROM t1 where t1.id IN (SELECT t2.i1 FROM t2 WHERE t2.i1 = t2.i2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 1 PRIMARY t1 ref id id 4 test.t2.i1 2 Using index 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where SELECT 1 FROM t1 where t1.id IN (SELECT t2.i1 FROM t2 WHERE t2.i1 = t2.i2); 1 1 1 1 drop table t1,t2; # # MDEV-15454: Nested SELECT IN returns wrong results # CREATE TABLE t1 ( a int NOT NULL PRIMARY KEY); CREATE TABLE t2 ( a int, b int ); INSERT INTO t2 VALUES (7878, 96),(3465, 96),(1403, 96),(4189, 96),(8732, 96), (5,96); CREATE TABLE t3 (c int unsigned NOT NULL, b int unsigned NOT NULL, PRIMARY KEY (c,b)); INSERT INTO t3 (c, b) VALUES (27, 96); CREATE PROCEDURE prepare_data() BEGIN DECLARE i INT DEFAULT 1; WHILE i < 1000 DO INSERT INTO t1 (a) VALUES (i); INSERT INTO t2 (a,b) VALUES (i,56); INSERT INTO t3 (c,b) VALUES (i,i); SET i = i + 1; END WHILE; END$$ CALL prepare_data(); SELECT t2.a FROM t2 WHERE t2.b IN (SELECT t3.b FROM t3 WHERE t3.c= 27); a 7878 3465 1403 4189 8732 5 set @save_optimizer_switch= @@optimizer_switch; SET optimizer_switch='materialization=off'; SELECT t1.a FROM t1 WHERE t1.a IN (SELECT t2.a FROM t2 WHERE t2.b IN (SELECT t3.b FROM t3 WHERE t3.c= 27)) LIMIT 5; a 5 SET optimizer_switch='materialization=on'; SELECT t1.a FROM t1 WHERE t1.a IN (SELECT t2.a FROM t2 WHERE t2.b IN (SELECT t3.b FROM t3 WHERE t3.c= 27)) LIMIT 5; a 5 drop procedure prepare_data; set @@optimizer_switch= @save_optimizer_switch; drop table t1,t2,t3; CREATE TABLE t1 ( id int NOT NULL, key(id)); INSERT INTO t1 VALUES (11),(12),(13),(14),(15),(16),(17),(18),(19); CREATE TABLE t2 (i1 int NOT NULL, i2 int NOT NULL); INSERT INTO t2 VALUES (11,11),(12,12),(13,13); CREATE VIEW v1 AS SELECT t2.i1 FROM t2 where t2.i1 = t2.i2; explain SELECT 1 FROM t1 where t1.id IN (SELECT v1.i1 from v1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 1 PRIMARY t1 ref id id 4 test.t2.i1 2 Using index 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where SELECT 1 FROM t1 where t1.id IN (SELECT v1.i1 from v1); 1 1 1 1 drop table t1,t2; drop view v1; # End of 5.5 tests # # MDEV-7220: Materialization strategy is not used for REPLACE ... SELECT # 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, c int); insert into t1 select A.a+B.a*10+C.a*100, A.a+B.a*10+C.a*100, A.a+B.a*10+C.a*100 from t0 A, t0 B, t0 C; create table t2 (a int, b int, c int); insert into t2 select A.a, A.a, A.a from t1 A; insert into t2 select * from t2; insert into t2 select * from t2; create table t3 as select * from t2 limit 1; # The testcase only makes sense if the following uses Materialization: explain select * from t1 where (a,b) in (select max(a),b from t2 group by b); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 1000 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.b 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 4000 Using temporary flush status; replace into t3 select * from t1 where (a,b) in (select max(a),b from t2 group by b); # Sequential reads: # 1K is read from t1 # 4K is read from t2 # 1K groups is read from the tmp. table # # Lookups: # 4K lookups in group by table # 1K lookups in temp.table # # Writes: # 2x 1K writes to temporary tables (grouping table and subquery materialization table # # The point is that neither counter should be in the millions (this # will happen if Materialization is not used show status where Variable_name like 'Handler_read%' or Variable_name like 'Handler_%write%'; Variable_name Value Handler_read_first 0 Handler_read_key 5000 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 6003 Handler_tmp_write 2000 Handler_write 1000 drop table t0,t1,t2,t3; # # MDEV-7971: Assertion `name != __null' failed in ACL_internal_schema_registry::lookup # on 2nd execution os PS with multi-table update # CREATE TABLE t1 (f1 INT); INSERT INTO t1 VALUES (1),(2); CREATE TABLE t2 (f2 INT); INSERT INTO t2 VALUES (3),(4); CREATE TABLE t3 (f3 INT); INSERT INTO t3 VALUES (5),(6); PREPARE stmt FROM ' UPDATE t1, t2 SET f1 = 5 WHERE 8 IN ( SELECT MIN(f3) FROM t3 ) '; EXECUTE stmt; EXECUTE stmt; DROP TABLE t1,t2,t3; # # MDEV-10389: Query returns different results on a debug vs non-debug build of the same revision # CREATE TABLE t1 (i1 INT, i2 INT NOT NULL); INSERT INTO t1 VALUES (1,4),(2,6); SELECT * FROM t1 AS alias1 WHERE alias1.i1 IN ( SELECT i1 FROM t1 WHERE alias1.i2 IN ( SELECT i2 FROM t1 HAVING i2 <> 7 ) ); i1 i2 1 4 2 6 DROP TABLE t1;