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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";
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;
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;
-------------------------------
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';
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 SUBQUERY 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`
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 SUBQUERY 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 SUBQUERY t3 system NULL NULL NULL NULL 1
2 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
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 SUBQUERY 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 SUBQUERY 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 DEPENDENT 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 DEPENDENT 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;
set @@optimizer_switch=@save_optimizer_switch;
|
