mariadb/mysql-test/t/subselect_partial_match.test
unknown 445fcaa81a MWL#68 efficient partial matching
- Added an initial set of feature-specific test cases
- Handled the special case where the materialized subquery of an
  IN predicates consists of only NULL values.
- Fixed a bug where making Item_in_subselect a constant,
  didn't respect its null_value value.
2011-07-15 00:23:57 +03:00

357 lines
9.8 KiB
Text

#
# Tests for
# MWL#68: Subquery optimization: Efficient NOT IN execution with NULLs
#
set @save_optimizer_switch=@@optimizer_switch;
--echo -------------------------------
--echo Part 1: Feature tests.
--echo -------------------------------
--echo Default for all tests.
set @@optimizer_switch="materialization=on,in_to_exists=off,semijoin=off,subquery_cache=off";
--echo
--echo Schema requires partial matching, but data analysis discoveres there is
--echo no need. This is possible only if all outer columns are not NULL.
--echo
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);
select a1, a2, (a1, a2) not in (select * from t2) as in_res from t1;
drop table t1, t2;
--echo
--echo NULLs in the outer columns, no NULLs in the suqbuery
--echo
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);
select a1, a2, (a1, a2) not in (select * from t2) as in_res from t1;
select * from t1
where (a1, a2) in (select * from t2 where b1 is not null and b2 is not null);
select a1, a2, (a1, a2) in (select * from t2) as in_res from t1;
drop table t1, t2;
--echo
--echo All columns require partial matching (no non-null columns)
--echo
--echo TODO
--echo
--echo Both non-NULL columns and columns with NULLs
--echo
--echo TODO
--echo
--echo Covering NULL rows
--echo
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);
select a1, a2, (a1, a2) not in (select * from t2) as in_res from t1;
insert into t2 values ('1 - 01', '2 - 01');
select * from t1
where (a1, a2) not in (select * from t2);
select a1, a2, (a1, a2) not in (select * from t2) as in_res from t1;
select * from t1
where (a1, a2) in (select * from t2);
select a1, a2, (a1, a2) in (select * from t2) as in_res from t1;
drop table t1, t2;
--echo
--echo Covering NULL columns
--echo
--echo 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);
select *, (a1, a2, a3) not in (select * from t2) as in_res from t1;
select * from t1
where (a1, a2, a3) in (select * from t2);
select *, (a1, a2, a3) in (select * from t2) as in_res from t1;
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);
select *, (a1, a2, a3) not in (select * from t2) as in_res from t1;
select * from t1
where (a1, a2, a3) in (select * from t2);
select *, (a1, a2, a3) in (select * from t2) as in_res from t1;
drop table t1, t2;
--echo
--echo Covering NULL row, and a NULL column
--echo
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);
select *, (a1, a2, a3) not in (select * from t2) as in_res from t1;
select * from t1
where (a1, a2, a3) in (select * from t2);
select *, (a1, a2, a3) in (select * from t2) as in_res from t1;
drop table t1, t2;
--echo
--echo Covering NULL row, and covering NULL columns
--echo
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);
select *, (a1, a2, a3) not in (select * from t2) as in_res from t1;
select * from t1
where (a1, a2, a3) in (select * from t2);
select *, (a1, a2, a3) in (select * from t2) as in_res from t1;
drop table t1, t2;
--echo -------------------------------
--echo Part 2: Test cases for bugs.
--echo -------------------------------
--disable_warnings
drop table if exists t1, t2;
--enable_warnings
--echo #
--echo # LP BUG#608744
--echo #
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);
drop table t1,t2;
--echo #
--echo # LP BUG#601156
--echo #
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;
DROP TABLE t1, t2;
--echo #
--echo # LP BUG#613009 Crash in Ordered_key::get_field_idx
--echo #
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);
select * from t1 where (a1, a2) not in (select a1, a2 from t1);
drop table t1;
--echo #
--echo # LP BUG#680058 void Ordered_key::add_key(rownum_t):
--echo # Assertion `key_buff_elements && cur_key_idx < key_buff_elements' failed
--echo #
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);
drop table t1, t2;
--echo #
--echo # LP BUG#809245 Second assertion `bit < (map)->n_bits' with partial_match_merge
--echo #
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);
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);
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);
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);
drop table t1, t2, t3;
--echo #
--echo # LP BUG#809266 Diverging results with partial_match_rowid_merge=on
--echo #
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);
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT b, a FROM t2);
EXPLAIN
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT a, b FROM t2);
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT a, b FROM t2);
set @@optimizer_switch='materialization=off,in_to_exists=on';
EXPLAIN
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT b, a FROM t2);
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT b, a FROM t2);
EXPLAIN
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT a, b FROM t2);
SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT a, b FROM t2);
drop table t1, t2;
set @@optimizer_switch=@save_optimizer_switch;