File: //usr/share/mysql-test/r/subselect_partial_match.result
set @save_optimizer_switch=@@optimizer_switch;
-------------------------------
Part 1: Feature tests.
-------------------------------
Default for all tests.
set @@optimizer_switch = "materialization=on,in_to_exists=off,semijoin=off,subquery_cache=off";
set @test_default_opt_switch = @@optimizer_switch;
set @in_exists = "materialization=off,in_to_exists=on,semijoin=off,subquery_cache=off";
-------------------------------------------------------------------------
Schema requires partial matching, but data analysis discoveres there is
no need. This is possible only if all outer columns are not NULL.
-------------------------------------------------------------------------
create table t1 (a1 char(8) not null, a2 char(8) not null);
create table t2 (b1 char(8), b2 char(8));
insert into t1 values ('1 - 00', '2 - 00');
insert into t1 values ('1 - 01', '2 - 01');
insert into t2 values ('1 - 00', '2 - 00');
insert into t2 values ('1 - 01', NULL );
insert into t2 values (NULL , '2 - 02');
insert into t2 values (NULL , NULL );
insert into t2 values ('1 - 02', '2 - 02');
select * from t1
where (a1, a2) not in (select * from t2 where b1 is not null and b2 is not null);
a1 a2
1 - 01 2 - 01
select a1, a2, (a1, a2) not in (select * from t2) as in_res from t1;
a1 a2 in_res
1 - 00 2 - 00 0
1 - 01 2 - 01 NULL
drop table t1, t2;
-------------------------------------------------------------------------
NULLs in the outer columns, no NULLs in the suqbuery
-------------------------------------------------------------------------
create table t1 (a1 char(8), a2 char(8));
create table t2 (b1 char(8) not null, b2 char(8) not null);
insert into t1 values (NULL , '2 - 00');
insert into t1 values ('1 - 01', '2 - 01');
insert into t1 values (NULL , NULL );
insert into t2 values ('1 - 00', '2 - 00');
insert into t2 values ('1 - 01', '2 - 01');
insert into t2 values ('1 - 02', '2 - 00');
select * from t1
where (a1, a2) not in (select * from t2 where b1 is not null and b2 is not null);
a1 a2
select a1, a2, (a1, a2) not in (select * from t2) as in_res from t1;
a1 a2 in_res
NULL 2 - 00 NULL
1 - 01 2 - 01 0
NULL NULL NULL
select * from t1
where (a1, a2) in (select * from t2 where b1 is not null and b2 is not null);
a1 a2
1 - 01 2 - 01
select a1, a2, (a1, a2) in (select * from t2) as in_res from t1;
a1 a2 in_res
NULL 2 - 00 NULL
1 - 01 2 - 01 1
NULL NULL NULL
drop table t1, t2;
-------------------------------------------------------------------------
NULLs in the outer column, NULLs in the subquery, there is
no value match in any column, but there is a partial match
such that some of the matching NULLs are in the outer columns,
the other NULLs are in the inner columns.
-------------------------------------------------------------------------
create table t1 (a1 char(1), a2 char(1), a3 char(1));
create table t2 (b1 char(1), b2 char(1), b3 char(1));
insert into t1 values ('c', NULL, 'a');
insert into t2 values (NULL, 'x', NULL);
insert into t2 values (NULL, 'y', NULL);
insert into t2 values ('o', 'z', 'p');
set @@optimizer_switch='partial_match_rowid_merge=on,partial_match_table_scan=off';
EXPLAIN
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
a1 a2 a3 in_res
c NULL a NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
a1 a2 a3
set @@optimizer_switch='partial_match_rowid_merge=off,partial_match_table_scan=on';
EXPLAIN
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
a1 a2 a3 in_res
c NULL a NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
a1 a2 a3
set @@optimizer_switch=@in_exists;
EXPLAIN
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 Using where
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
a1 a2 a3 in_res
c NULL a NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 Using where
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
a1 a2 a3
set @@optimizer_switch = @test_default_opt_switch;
drop table t1, t2;
create table t1 (a1 char(1), a2 char(1) not null, a3 char(1));
create table t2 (b1 char(1), b2 char(1), b3 char(1));
insert into t1 values (NULL, 'y', NULL);
insert into t2 values ('v', 'x', NULL);
insert into t2 values (NULL, 'y', 'w');
set @@optimizer_switch='partial_match_rowid_merge=on,partial_match_table_scan=off';
EXPLAIN
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
a1 a2 a3 in_res
NULL y NULL NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
a1 a2 a3
set @@optimizer_switch='partial_match_rowid_merge=off,partial_match_table_scan=on';
EXPLAIN
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
a1 a2 a3 in_res
NULL y NULL NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
a1 a2 a3
set @@optimizer_switch=@in_exists;
EXPLAIN
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
a1 a2 a3 in_res
NULL y NULL NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
a1 a2 a3
set @@optimizer_switch = @test_default_opt_switch;
drop table t1, t2;
-------------------------------------------------------------------------
There is only one column in the subquery to complement the NULLs in the
outer reference. It is a NULL column, so a match is guaranteed.
-------------------------------------------------------------------------
create table t1 (a1 char(1), a2 char(1), a3 char(1));
create table t2 (b1 char(1), b2 char(1), b3 char(1));
insert into t1 values (NULL, 'g', NULL);
insert into t2 values ('z', NULL, 'y');
insert into t2 values (NULL, 'z', 'y');
set @@optimizer_switch='partial_match_rowid_merge=on,partial_match_table_scan=off';
EXPLAIN
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
a1 a2 a3 in_res
NULL g NULL NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
a1 a2 a3
set @@optimizer_switch='partial_match_rowid_merge=off,partial_match_table_scan=on';
EXPLAIN
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
a1 a2 a3 in_res
NULL g NULL NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
a1 a2 a3
set @@optimizer_switch=@in_exists;
EXPLAIN
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
a1 a2 a3 in_res
NULL g NULL NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
a1 a2 a3
set @@optimizer_switch = @test_default_opt_switch;
drop table t1, t2;
-------------------------------------------------------------------------
The intersection of the NULL bitmaps is empty because the ranges
of NULL bits do not overlap.
-------------------------------------------------------------------------
create table t1 (a1 char(1), a2 char(1), a3 char(1));
create table t2 (b1 char(1), b2 char(1), b3 char(1));
insert into t1 values ('b', 'g', NULL);
insert into t2 values ('z', NULL, 'y');
insert into t2 values (NULL, 'z', 'y');
set @@optimizer_switch='partial_match_rowid_merge=on,partial_match_table_scan=off';
EXPLAIN
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
a1 a2 a3 in_res
b g NULL 0
EXPLAIN
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
a1 a2 a3
b g NULL
set @@optimizer_switch='partial_match_rowid_merge=off,partial_match_table_scan=on';
EXPLAIN
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
a1 a2 a3 in_res
b g NULL 0
EXPLAIN
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
a1 a2 a3
b g NULL
set @@optimizer_switch=@in_exists;
EXPLAIN
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
SELECT t1.*, (a1, a2, a3) IN (select * from t2) as in_res from t1;
a1 a2 a3 in_res
b g NULL 0
EXPLAIN
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
SELECT * from t1 where (a1, a2, a3) NOT IN (select * from t2);
a1 a2 a3
b g NULL
drop table t1, t2;
-------------------------------------------------------------------------
The intersection of the NULL bitmaps is non-empty, and there is a
non-NULL column.
-------------------------------------------------------------------------
create table t1 (a1 char(1), a2 char(1), a3 char(1) not null, a4 char(10));
create table t2 (b1 char(1), b2 char(1), b3 char(1), b4 char(1));
insert into t1 values ('a', 'g', 'x', NULL);
insert into t2 values ('z', NULL, 'y', 'x');
insert into t2 values (NULL, NULL, 'x', 'y');
insert into t2 values ('x', 'w', 'z', NULL);
set @@optimizer_switch='partial_match_rowid_merge=on,partial_match_table_scan=off';
EXPLAIN
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 Using where
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
a1 a2 a3 a4 in_res
a g x NULL NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 Using where
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
a1 a2 a3 a4
set @@optimizer_switch='partial_match_rowid_merge=off,partial_match_table_scan=on';
EXPLAIN
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 Using where
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
a1 a2 a3 a4 in_res
a g x NULL NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 Using where
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
a1 a2 a3 a4
set @@optimizer_switch=@in_exists;
EXPLAIN
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 Using where
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
a1 a2 a3 a4 in_res
a g x NULL NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 Using where
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
a1 a2 a3 a4
drop table t1, t2;
-------------------------------------------------------------------------
Value match in one row, but the NULL complement match in another.
The result must be false.
-------------------------------------------------------------------------
create table t1 (a1 char(2), a2 char(1), a3 char(1) not null, a4 char(10));
create table t2 (b1 char(2), b2 char(1), b3 char(1), b4 char(1));
insert into t1 values ('99', NULL, 'j', 'f');
insert into t2 values ('01', NULL, 'y', NULL);
insert into t2 values ('02', NULL, 'x', 'y');
insert into t2 values ('03', 'q', 'y', 'x');
insert into t2 values (NULL, 'q', 'm', 'p');
insert into t2 values ('m', 'z', 'j', NULL);
insert into t2 values (NULL, 'z', 'b', NULL);
insert into t2 values (NULL, 'z', 'a', NULL);
insert into t2 values ('34', 'q', 'y', 'x');
set @@optimizer_switch='partial_match_rowid_merge=on,partial_match_table_scan=off';
EXPLAIN
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 8 Using where
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
a1 a2 a3 a4 in_res
99 NULL j f 0
EXPLAIN
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 8 Using where
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
a1 a2 a3 a4
99 NULL j f
set @@optimizer_switch='partial_match_rowid_merge=off,partial_match_table_scan=on';
EXPLAIN
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 8 Using where
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
a1 a2 a3 a4 in_res
99 NULL j f 0
EXPLAIN
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 8 Using where
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
a1 a2 a3 a4
99 NULL j f
set @@optimizer_switch=@in_exists;
EXPLAIN
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 8 Using where
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
a1 a2 a3 a4 in_res
99 NULL j f 0
EXPLAIN
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 8 Using where
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
a1 a2 a3 a4
99 NULL j f
drop table t1, t2;
-------------------------------------------------------------------------
Test the intersection of larger number of rows with NULL, such that
the number is at the boundary 32. This test is based on the implementation
of MY_BITMAP which uses 32 bit words, and the intersection operation works
by intersecting the bitmap word by word.
-------------------------------------------------------------------------
create table t1 (a1 char(2), a2 char(2), a3 char(1), a4 char(10)) ENGINE=MyISAM;
create table t2 (b1 char(2), b2 char(2), b3 char(1), b4 char(1)) ENGINE=MyISAM;
insert into t1 values (NULL, '98', NULL, 'b');
insert into t1 values (NULL, '99', NULL, 'c');
insert into t2 values ('00', 'rr', 'y', NULL);
insert into t2 values ('01', 'rr', 'y', NULL);
insert into t2 values ('02', NULL, 'x', 'y');
insert into t2 values ('03', 'qq', 'y', 'x');
insert into t2 values ('04', 'qq', 'm', 'p');
insert into t2 values ('05', 'rr', 'y', NULL);
insert into t2 values ('06', NULL, 'x', 'y');
insert into t2 values ('07', 'qq', 'y', 'x');
insert into t2 values ('08', 'qq', 'm', 'q');
insert into t2 values ('09', 'rr', 'y', NULL);
insert into t2 values ('10', NULL, 'x', 'y');
insert into t2 values ('11', 'qq', 'y', 'x');
insert into t2 values ('12', 'qq', 'm', 'k');
insert into t2 values ('13', 'rr', 'y', NULL);
insert into t2 values ('14', NULL, 'x', 'y');
insert into t2 values ('15', 'qq', 'y', 'x');
insert into t2 values ('16', 'qq', 'm', 's');
insert into t2 values ('17', 'rr', 'y', NULL);
insert into t2 values ('18', NULL, 'x', 'y');
insert into t2 values ('19', 'qq', 'y', 'x');
insert into t2 values ('20', 'qq', 'm', 't');
insert into t2 values ('21', 'rr', 'y', NULL);
insert into t2 values ('22', NULL, 'x', 'y');
insert into t2 values ('23', 'qq', 'y', 'x');
insert into t2 values ('24', 'qq', 'm', 'u');
insert into t2 values ('25', 'rr', 'y', NULL);
insert into t2 values ('26', NULL, 'x', 'y');
insert into t2 values ('27', 'qq', 'y', 'x');
insert into t2 values ('28', 'qq', 'm', 'y');
insert into t2 values ('29', 'rr', 'y', NULL);
insert into t2 values ('30', NULL, 'x', 'z');
insert into t2 values ('31', 'ss', 'h', NULL);
insert into t2 values ('32', 'vv', 'i', NULL);
the only partial matching row
insert into t2 values ('33', NULL, 'j', NULL);
insert into t2 values ('34', 'qq', 'y', 'x');
set @@optimizer_switch='partial_match_rowid_merge=on,partial_match_table_scan=off';
EXPLAIN
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 35 Using where
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
a1 a2 a3 a4 in_res
NULL 98 NULL b NULL
NULL 99 NULL c NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 35 Using where
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
a1 a2 a3 a4
set @@optimizer_switch='partial_match_rowid_merge=off,partial_match_table_scan=on';
EXPLAIN
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 35 Using where
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
a1 a2 a3 a4 in_res
NULL 98 NULL b NULL
NULL 99 NULL c NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 35 Using where
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
a1 a2 a3 a4
set @@optimizer_switch=@in_exists;
EXPLAIN
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 35 Using where
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
a1 a2 a3 a4 in_res
NULL 98 NULL b NULL
NULL 99 NULL c NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 35 Using where
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
a1 a2 a3 a4
change the mathcing row to be the last one in the first bitmap word
update t2 set b2 = 'zz' where b1 = 33;
update t2 set b2 = NULL where b1 = 31;
set @@optimizer_switch='partial_match_rowid_merge=on,partial_match_table_scan=off';
EXPLAIN
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 35 Using where
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
a1 a2 a3 a4 in_res
NULL 98 NULL b NULL
NULL 99 NULL c NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 35 Using where
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
a1 a2 a3 a4
set @@optimizer_switch='partial_match_rowid_merge=off,partial_match_table_scan=on';
EXPLAIN
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 35 Using where
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
a1 a2 a3 a4 in_res
NULL 98 NULL b NULL
NULL 99 NULL c NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 35 Using where
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
a1 a2 a3 a4
set @@optimizer_switch=@in_exists;
EXPLAIN
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 35 Using where
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
a1 a2 a3 a4 in_res
NULL 98 NULL b NULL
NULL 99 NULL c NULL
EXPLAIN
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 35 Using where
SELECT * from t1 where (a1, a2, a3, a4) NOT IN (select * from t2);
a1 a2 a3 a4
drop table t1, t2;
-------------------------------------------------------------------------
All columns require partial matching (no non-null columns)
-------------------------------------------------------------------------
TODO
-------------------------------------------------------------------------
Both non-NULL columns and columns with NULLs
-------------------------------------------------------------------------
TODO
-------------------------------------------------------------------------
Covering NULL rows
-------------------------------------------------------------------------
create table t1 (a1 char(8), a2 char(8));
create table t2 (b1 char(8), b2 char(8));
insert into t1 values ('1 - 00', '2 - 00');
insert into t1 values ('1 - 01', '2 - 01');
insert into t2 values ('1 - 01', NULL );
insert into t2 values (NULL , '2 - 02');
insert into t2 values (NULL , NULL );
insert into t2 values ('1 - 02', '2 - 02');
select * from t1
where (a1, a2) not in (select * from t2);
a1 a2
select a1, a2, (a1, a2) not in (select * from t2) as in_res from t1;
a1 a2 in_res
1 - 00 2 - 00 NULL
1 - 01 2 - 01 NULL
insert into t2 values ('1 - 01', '2 - 01');
select * from t1
where (a1, a2) not in (select * from t2);
a1 a2
select a1, a2, (a1, a2) not in (select * from t2) as in_res from t1;
a1 a2 in_res
1 - 00 2 - 00 NULL
1 - 01 2 - 01 0
select * from t1
where (a1, a2) in (select * from t2);
a1 a2
1 - 01 2 - 01
select a1, a2, (a1, a2) in (select * from t2) as in_res from t1;
a1 a2 in_res
1 - 00 2 - 00 NULL
1 - 01 2 - 01 1
drop table t1, t2;
-------------------------------------------------------------------------
Covering NULL columns
-------------------------------------------------------------------------
this case affects only the rowid-merge algorithm
set @@optimizer_switch="partial_match_rowid_merge=on,partial_match_table_scan=off";
create table t1 (a1 char(8) not null, a2 char(8), a3 char(8) not null);
create table t2 (b1 char(8) not null, b2 char(8), b3 char(8) not null);
insert into t1 values ('1 - 00', '2 - 00', '3 - 00');
insert into t1 values ('1 - 01', '2 - 01', '3 - 01');
insert into t2 values ('1 - 01', NULL, '3 - x1');
insert into t2 values ('1 - 02', NULL, '3 - 02');
insert into t2 values ('1 - 00', NULL, '3 - 00');
select * from t1
where (a1, a2, a3) not in (select * from t2);
a1 a2 a3
1 - 01 2 - 01 3 - 01
select *, (a1, a2, a3) not in (select * from t2) as in_res from t1;
a1 a2 a3 in_res
1 - 00 2 - 00 3 - 00 NULL
1 - 01 2 - 01 3 - 01 1
select * from t1
where (a1, a2, a3) in (select * from t2);
a1 a2 a3
select *, (a1, a2, a3) in (select * from t2) as in_res from t1;
a1 a2 a3 in_res
1 - 00 2 - 00 3 - 00 NULL
1 - 01 2 - 01 3 - 01 0
drop table t1, t2;
create table t1 (a1 char(8), a2 char(8), a3 char(8) not null);
create table t2 (b1 char(8), b2 char(8), b3 char(8) not null);
insert into t1 values ('1 - 00', '2 - 00', '3 - 00');
insert into t1 values ('1 - 01', '2 - 01', '3 - 01');
insert into t2 values (NULL, NULL, '3 - x1');
insert into t2 values (NULL, NULL, '3 - 02');
insert into t2 values (NULL, NULL, '3 - 00');
select * from t1
where (a1, a2, a3) not in (select * from t2);
a1 a2 a3
1 - 01 2 - 01 3 - 01
select *, (a1, a2, a3) not in (select * from t2) as in_res from t1;
a1 a2 a3 in_res
1 - 00 2 - 00 3 - 00 NULL
1 - 01 2 - 01 3 - 01 1
select * from t1
where (a1, a2, a3) in (select * from t2);
a1 a2 a3
select *, (a1, a2, a3) in (select * from t2) as in_res from t1;
a1 a2 a3 in_res
1 - 00 2 - 00 3 - 00 NULL
1 - 01 2 - 01 3 - 01 0
drop table t1, t2;
-------------------------------------------------------------------------
Covering NULL row, and a NULL column
-------------------------------------------------------------------------
create table t1 (a1 char(8) not null, a2 char(8), a3 char(8));
create table t2 (b1 char(8), b2 char(8), b3 char(8));
insert into t1 values ('1 - 00', '2 - 00', '3 - 00');
insert into t1 values ('1 - 01', '2 - 01', '3 - 01');
insert into t2 values ('1 - 01', NULL, '3 - x1');
insert into t2 values (NULL , NULL, NULL );
insert into t2 values ('1 - 00', NULL, '3 - 00');
select * from t1
where (a1, a2, a3) not in (select * from t2);
a1 a2 a3
select *, (a1, a2, a3) not in (select * from t2) as in_res from t1;
a1 a2 a3 in_res
1 - 00 2 - 00 3 - 00 NULL
1 - 01 2 - 01 3 - 01 NULL
select * from t1
where (a1, a2, a3) in (select * from t2);
a1 a2 a3
select *, (a1, a2, a3) in (select * from t2) as in_res from t1;
a1 a2 a3 in_res
1 - 00 2 - 00 3 - 00 NULL
1 - 01 2 - 01 3 - 01 NULL
drop table t1, t2;
-------------------------------------------------------------------------
Covering NULL row, and covering NULL columns
-------------------------------------------------------------------------
create table t1 (a1 char(8) not null, a2 char(8), a3 char(8));
create table t2 (b1 char(8), b2 char(8), b3 char(8));
insert into t1 values ('1 - 00', '2 - 00', '3 - 00');
insert into t1 values ('1 - 01', '2 - 01', '3 - 01');
insert into t2 values (NULL, NULL, NULL);
insert into t2 values (NULL, NULL, NULL);
select * from t1
where (a1, a2, a3) not in (select * from t2);
a1 a2 a3
select *, (a1, a2, a3) not in (select * from t2) as in_res from t1;
a1 a2 a3 in_res
1 - 00 2 - 00 3 - 00 NULL
1 - 01 2 - 01 3 - 01 NULL
select * from t1
where (a1, a2, a3) in (select * from t2);
a1 a2 a3
select *, (a1, a2, a3) in (select * from t2) as in_res from t1;
a1 a2 a3 in_res
1 - 00 2 - 00 3 - 00 NULL
1 - 01 2 - 01 3 - 01 NULL
drop table t1, t2;
-------------------------------------------------------------------------
Small buffer for the rowid_merge partial match algorithm that forces
reverting to table scan partial match.
-------------------------------------------------------------------------
set @save_rowid_merge_buff_size = @@rowid_merge_buff_size;
set @@rowid_merge_buff_size = 0;
create table t1 (a1 char(2), a2 char(2), a3 char(1), a4 char(10));
create table t2 (b1 char(2), b2 char(2), b3 char(1), b4 char(1));
insert into t1 values (NULL, '98', NULL, 'b');
insert into t1 values (NULL, '99', NULL, 'c');
insert into t2 values ('00', 'rr', 'y', NULL);
insert into t2 values ('01', 'rr', 'y', NULL);
insert into t2 values ('02', NULL, 'x', 'y');
insert into t2 values ('03', 'qq', 'y', 'x');
set @@optimizer_switch='partial_match_rowid_merge=on,partial_match_table_scan=off';
EXPLAIN
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 4 Using where
SELECT t1.*, (a1, a2, a3, a4) IN (select * from t2) as in_res from t1;
a1 a2 a3 a4 in_res
NULL 98 NULL b 0
NULL 99 NULL c 0
drop table t1, t2;
set @@rowid_merge_buff_size = @save_rowid_merge_buff_size;
-------------------------------
Part 2: Test cases for bugs.
-------------------------------
drop table if exists t1, t2;
#
# LP BUG#608744
#
set @@optimizer_switch="materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=off";
create table t1 (a1 char(1), a2 char(1));
insert into t1 values (NULL, 'b');
create table t2 (b1 char(1), b2 char(2));
insert into t2 values ('a','b'), ('c', 'd');
select * from t1 where (a1, a2) NOT IN (select b1, b2 from t2);
a1 a2
drop table t1,t2;
#
# LP BUG#601156
#
CREATE TABLE t1 (a1 int DEFAULT NULL, a2 int DEFAULT NULL);
INSERT INTO t1 VALUES (NULL,2);
INSERT INTO t1 VALUES (4,NULL);
CREATE TABLE t2 (b1 int DEFAULT NULL, b2 int DEFAULT NULL);
INSERT INTO t2 VALUES (6,NULL);
INSERT INTO t2 VALUES (NULL,0);
set @@optimizer_switch='materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on';
set @tmp_optimizer_switch=@@optimizer_switch;
set optimizer_switch='derived_merge=off,derived_with_keys=off';
EXPLAIN EXTENDED
SELECT * FROM (SELECT * FROM t1 WHERE a1 NOT IN (SELECT b2 FROM t2)) table1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00
2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using where
3 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 100.00
Warnings:
Note 1003 select `table1`.`a1` AS `a1`,`table1`.`a2` AS `a2` from (select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (not(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (select `test`.`t2`.`b2` from `test`.`t2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery3>`.`b2`)))))))) `table1`
set optimizer_switch=@tmp_optimizer_switch;
DROP TABLE t1, t2;
#
# LP BUG#613009 Crash in Ordered_key::get_field_idx
#
set @@optimizer_switch='materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=off';
create table t1 (a1 char(3) DEFAULT NULL, a2 char(3) DEFAULT NULL);
insert into t1 values (NULL, 'a21'), (NULL, 'a22');
explain select * from t1 where (a1, a2) not in (select a1, a2 from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 2
select * from t1 where (a1, a2) not in (select a1, a2 from t1);
a1 a2
drop table t1;
#
# LP BUG#680058 void Ordered_key::add_key(rownum_t):
# Assertion `key_buff_elements && cur_key_idx < key_buff_elements' failed
#
create table t1 (f1 char(1), f2 char(1));
insert into t1 values ('t', '0'), ('0', 't');
create table t2 (f3 char(1), f4 char(1));
insert into t2 values ('t', NULL), ('t', NULL), ('d', 'y');
set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,semijoin=off';
select * from t1 where (f1, f2) not in (select * from t2);
f1 f2
0 t
drop table t1, t2;
#
# LP BUG#809245 Second assertion `bit < (map)->n_bits' with partial_match_merge
#
CREATE TABLE t1 (d varchar(32)) ;
INSERT INTO t1 VALUES ('r');
CREATE TABLE t2 ( a int, c varchar(32)) ;
INSERT INTO t2 VALUES (5,'r');
CREATE TABLE t3 ( a int NOT NULL , d varchar(32)) ;
INSERT INTO t3 VALUES (10,'g');
set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,in_to_exists=off';
EXPLAIN SELECT *
FROM t1
WHERE (t1.d , t1.d) NOT IN (
SELECT t3.d , t2.c
FROM t3 LEFT JOIN t2 ON t3.a = t2.a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 MATERIALIZED t3 system NULL NULL NULL NULL 1
2 MATERIALIZED t2 system NULL NULL NULL NULL 1
SELECT *
FROM t1
WHERE (t1.d , t1.d) NOT IN (
SELECT t3.d , t2.c
FROM t3 LEFT JOIN t2 ON t3.a = t2.a);
d
r
set @@optimizer_switch='materialization=off,in_to_exists=on';
EXPLAIN SELECT *
FROM t1
WHERE (t1.d , t1.d) NOT IN (
SELECT t3.d , t2.c
FROM t3 LEFT JOIN t2 ON t3.a = t2.a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t3 system NULL NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 1
SELECT *
FROM t1
WHERE (t1.d , t1.d) NOT IN (
SELECT t3.d , t2.c
FROM t3 LEFT JOIN t2 ON t3.a = t2.a);
d
r
drop table t1, t2, t3;
#
# LP BUG#809266 Diverging results with partial_match_rowid_merge=on
#
CREATE TABLE t1 (c int) ;
INSERT INTO t1 VALUES (0),(0);
CREATE TABLE t2 (a int, b int) ;
INSERT INTO t2 VALUES (6,3), (9,NULL);
set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,in_to_exists=off';
EXPLAIN
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT b, a FROM t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT b, a FROM t2);
c
0
0
EXPLAIN
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT a, b FROM t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT a, b FROM t2);
c
0
0
set @@optimizer_switch='materialization=off,in_to_exists=on';
EXPLAIN
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT b, a FROM t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT b, a FROM t2);
c
0
0
EXPLAIN
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT a, b FROM t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT a, b FROM t2);
c
0
0
drop table t1, t2;
#
# LP BUG#856152 Wrong result with NOT IN subquery and partial_match_rowid_merge
#
CREATE TABLE t1 ( f1 integer NOT NULL , f2 integer) ;
INSERT INTO t1 VALUES (3,3),(48,NULL),(49,1);
CREATE TABLE t2 ( f3 int) ;
INSERT INTO t2 VALUES (5);
set @@optimizer_switch='in_to_exists=off,materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off';
EXPLAIN SELECT * FROM t2 WHERE ( 3 , 1 ) NOT IN ( SELECT f1 , f2 FROM t1 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 system NULL NULL NULL NULL 1
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 3
SELECT * FROM t2 WHERE ( 3 , 1 ) NOT IN ( SELECT f1 , f2 FROM t1 );
f3
5
set @@optimizer_switch='in_to_exists=on,materialization=off';
EXPLAIN SELECT * FROM t2 WHERE ( 3 , 1 ) NOT IN ( SELECT f1 , f2 FROM t1 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 system NULL NULL NULL NULL 1
2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 Using where
SELECT * FROM t2 WHERE ( 3 , 1 ) NOT IN ( SELECT f1 , f2 FROM t1 );
f3
5
drop table t1, t2;
#
# LP BUG#869036 Wrong result with in_to_exists=ON and NOT IN
#
create table outer_sq (f1 char(1), f2 char(1));
insert into outer_sq values (NULL, 'c'), ('g', 'c');
create table inner_sq (f3 char(1), f4 char(1));
insert into inner_sq values(null, 'i'), ('v', null);
All three strategies below must produce the same result.
set @@optimizer_switch='in_to_exists=off,materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off';
SELECT outer_sq.*, (f1, f2) IN (select * from inner_sq) from outer_sq;
f1 f2 (f1, f2) IN (select * from inner_sq)
NULL c NULL
g c 0
SELECT * from outer_sq where (f1, f2) NOT IN (select * from inner_sq);
f1 f2
g c
set @@optimizer_switch='in_to_exists=off,materialization=on,partial_match_rowid_merge=off,partial_match_table_scan=on';
SELECT outer_sq.*, (f1, f2) IN (select * from inner_sq) from outer_sq;
f1 f2 (f1, f2) IN (select * from inner_sq)
NULL c NULL
g c 0
SELECT * from outer_sq where (f1, f2) NOT IN (select * from inner_sq);
f1 f2
g c
set @@optimizer_switch='in_to_exists=on,materialization=off';
SELECT outer_sq.*, (f1, f2) IN (select * from inner_sq) from outer_sq;
f1 f2 (f1, f2) IN (select * from inner_sq)
NULL c NULL
g c 0
SELECT * from outer_sq where (f1, f2) NOT IN (select * from inner_sq);
f1 f2
g c
drop table outer_sq, inner_sq;
#
# LP BUG#893486 Wrong result with partial_match_rowid_merge , NOT IN , NULLs
#
CREATE TABLE t1 (a int, b int);
INSERT INTO t1 VALUES (0,NULL),(2,NULL);
CREATE TABLE t2 (c int, d int);
INSERT INTO t2 VALUES (2,3),(4,5),(6, NULL);
set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,in_to_exists=off';
EXPLAIN SELECT * FROM t1 WHERE (a, b) NOT IN (SELECT c, d FROM t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
SELECT * FROM t1 WHERE (a, b) NOT IN (SELECT c, d FROM t2);
a b
0 NULL
SELECT a, b, (a, b) NOT IN (SELECT c, d FROM t2) subq_res FROM t1;
a b subq_res
0 NULL 1
2 NULL NULL
EXPLAIN SELECT * FROM t1 WHERE (a, b) NOT IN (SELECT c, d FROM t2 WHERE d is not NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
SELECT * FROM t1 WHERE (a, b) NOT IN (SELECT c, d FROM t2 WHERE d is not NULL);
a b
0 NULL
SELECT a, b, (a, b) NOT IN (SELECT c, d FROM t2 WHERE d is not NULL) subq_res FROM t1;
a b subq_res
0 NULL 1
2 NULL NULL
drop table t1,t2;
set @@optimizer_switch=@save_optimizer_switch;