mirror of
https://github.com/MariaDB/server.git
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445fcaa81a
- 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.
351 lines
12 KiB
Plaintext
351 lines
12 KiB
Plaintext
set @save_optimizer_switch=@@optimizer_switch;
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-------------------------------
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Part 1: Feature tests.
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-------------------------------
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Default for all tests.
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set @@optimizer_switch="materialization=on,in_to_exists=off,semijoin=off,subquery_cache=off";
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Schema requires partial matching, but data analysis discoveres there is
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no need. This is possible only if all outer columns are not NULL.
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create table t1 (a1 char(8) not null, a2 char(8) not null);
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create table t2 (b1 char(8), b2 char(8));
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insert into t1 values ('1 - 00', '2 - 00');
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insert into t1 values ('1 - 01', '2 - 01');
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insert into t2 values ('1 - 00', '2 - 00');
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insert into t2 values ('1 - 01', NULL );
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insert into t2 values (NULL , '2 - 02');
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insert into t2 values (NULL , NULL );
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insert into t2 values ('1 - 02', '2 - 02');
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select * from t1
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where (a1, a2) not in (select * from t2 where b1 is not null and b2 is not null);
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a1 a2
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1 - 01 2 - 01
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select a1, a2, (a1, a2) not in (select * from t2) as in_res from t1;
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a1 a2 in_res
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1 - 00 2 - 00 0
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1 - 01 2 - 01 NULL
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drop table t1, t2;
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NULLs in the outer columns, no NULLs in the suqbuery
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create table t1 (a1 char(8), a2 char(8));
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create table t2 (b1 char(8) not null, b2 char(8) not null);
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insert into t1 values (NULL , '2 - 00');
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insert into t1 values ('1 - 01', '2 - 01');
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insert into t1 values (NULL , NULL );
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insert into t2 values ('1 - 00', '2 - 00');
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insert into t2 values ('1 - 01', '2 - 01');
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insert into t2 values ('1 - 02', '2 - 00');
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select * from t1
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where (a1, a2) not in (select * from t2 where b1 is not null and b2 is not null);
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a1 a2
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select a1, a2, (a1, a2) not in (select * from t2) as in_res from t1;
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a1 a2 in_res
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NULL 2 - 00 NULL
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1 - 01 2 - 01 0
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NULL NULL NULL
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select * from t1
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where (a1, a2) in (select * from t2 where b1 is not null and b2 is not null);
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a1 a2
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1 - 01 2 - 01
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select a1, a2, (a1, a2) in (select * from t2) as in_res from t1;
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a1 a2 in_res
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NULL 2 - 00 NULL
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1 - 01 2 - 01 1
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NULL NULL NULL
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drop table t1, t2;
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All columns require partial matching (no non-null columns)
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TODO
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Both non-NULL columns and columns with NULLs
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TODO
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Covering NULL rows
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create table t1 (a1 char(8), a2 char(8));
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create table t2 (b1 char(8), b2 char(8));
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insert into t1 values ('1 - 00', '2 - 00');
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insert into t1 values ('1 - 01', '2 - 01');
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insert into t2 values ('1 - 01', NULL );
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insert into t2 values (NULL , '2 - 02');
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insert into t2 values (NULL , NULL );
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insert into t2 values ('1 - 02', '2 - 02');
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select * from t1
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where (a1, a2) not in (select * from t2);
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a1 a2
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select a1, a2, (a1, a2) not in (select * from t2) as in_res from t1;
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a1 a2 in_res
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1 - 00 2 - 00 NULL
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1 - 01 2 - 01 NULL
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insert into t2 values ('1 - 01', '2 - 01');
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select * from t1
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where (a1, a2) not in (select * from t2);
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a1 a2
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select a1, a2, (a1, a2) not in (select * from t2) as in_res from t1;
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a1 a2 in_res
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1 - 00 2 - 00 NULL
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1 - 01 2 - 01 0
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select * from t1
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where (a1, a2) in (select * from t2);
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a1 a2
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1 - 01 2 - 01
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select a1, a2, (a1, a2) in (select * from t2) as in_res from t1;
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a1 a2 in_res
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1 - 00 2 - 00 NULL
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1 - 01 2 - 01 1
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drop table t1, t2;
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Covering NULL columns
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this case affects only the rowid-merge algorithm
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set @@optimizer_switch="partial_match_rowid_merge=on,partial_match_table_scan=off";
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create table t1 (a1 char(8) not null, a2 char(8), a3 char(8) not null);
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create table t2 (b1 char(8) not null, b2 char(8), b3 char(8) not null);
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insert into t1 values ('1 - 00', '2 - 00', '3 - 00');
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insert into t1 values ('1 - 01', '2 - 01', '3 - 01');
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insert into t2 values ('1 - 01', NULL, '3 - x1');
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insert into t2 values ('1 - 02', NULL, '3 - 02');
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insert into t2 values ('1 - 00', NULL, '3 - 00');
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select * from t1
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where (a1, a2, a3) not in (select * from t2);
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a1 a2 a3
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1 - 01 2 - 01 3 - 01
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select *, (a1, a2, a3) not in (select * from t2) as in_res from t1;
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a1 a2 a3 in_res
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1 - 00 2 - 00 3 - 00 NULL
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1 - 01 2 - 01 3 - 01 1
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select * from t1
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where (a1, a2, a3) in (select * from t2);
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a1 a2 a3
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select *, (a1, a2, a3) in (select * from t2) as in_res from t1;
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a1 a2 a3 in_res
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1 - 00 2 - 00 3 - 00 NULL
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1 - 01 2 - 01 3 - 01 0
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drop table t1, t2;
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create table t1 (a1 char(8), a2 char(8), a3 char(8) not null);
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create table t2 (b1 char(8), b2 char(8), b3 char(8) not null);
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insert into t1 values ('1 - 00', '2 - 00', '3 - 00');
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insert into t1 values ('1 - 01', '2 - 01', '3 - 01');
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insert into t2 values (NULL, NULL, '3 - x1');
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insert into t2 values (NULL, NULL, '3 - 02');
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insert into t2 values (NULL, NULL, '3 - 00');
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select * from t1
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where (a1, a2, a3) not in (select * from t2);
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a1 a2 a3
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1 - 01 2 - 01 3 - 01
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select *, (a1, a2, a3) not in (select * from t2) as in_res from t1;
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a1 a2 a3 in_res
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1 - 00 2 - 00 3 - 00 NULL
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1 - 01 2 - 01 3 - 01 1
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select * from t1
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where (a1, a2, a3) in (select * from t2);
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a1 a2 a3
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select *, (a1, a2, a3) in (select * from t2) as in_res from t1;
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a1 a2 a3 in_res
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1 - 00 2 - 00 3 - 00 NULL
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1 - 01 2 - 01 3 - 01 0
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drop table t1, t2;
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Covering NULL row, and a NULL column
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create table t1 (a1 char(8) not null, a2 char(8), a3 char(8));
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create table t2 (b1 char(8), b2 char(8), b3 char(8));
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insert into t1 values ('1 - 00', '2 - 00', '3 - 00');
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insert into t1 values ('1 - 01', '2 - 01', '3 - 01');
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insert into t2 values ('1 - 01', NULL, '3 - x1');
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insert into t2 values (NULL , NULL, NULL );
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insert into t2 values ('1 - 00', NULL, '3 - 00');
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select * from t1
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where (a1, a2, a3) not in (select * from t2);
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a1 a2 a3
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select *, (a1, a2, a3) not in (select * from t2) as in_res from t1;
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a1 a2 a3 in_res
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1 - 00 2 - 00 3 - 00 NULL
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1 - 01 2 - 01 3 - 01 NULL
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select * from t1
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where (a1, a2, a3) in (select * from t2);
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a1 a2 a3
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select *, (a1, a2, a3) in (select * from t2) as in_res from t1;
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a1 a2 a3 in_res
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1 - 00 2 - 00 3 - 00 NULL
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1 - 01 2 - 01 3 - 01 NULL
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drop table t1, t2;
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Covering NULL row, and covering NULL columns
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create table t1 (a1 char(8) not null, a2 char(8), a3 char(8));
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create table t2 (b1 char(8), b2 char(8), b3 char(8));
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insert into t1 values ('1 - 00', '2 - 00', '3 - 00');
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insert into t1 values ('1 - 01', '2 - 01', '3 - 01');
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insert into t2 values (NULL, NULL, NULL);
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insert into t2 values (NULL, NULL, NULL);
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select * from t1
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where (a1, a2, a3) not in (select * from t2);
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a1 a2 a3
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select *, (a1, a2, a3) not in (select * from t2) as in_res from t1;
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a1 a2 a3 in_res
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1 - 00 2 - 00 3 - 00 NULL
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1 - 01 2 - 01 3 - 01 NULL
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select * from t1
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where (a1, a2, a3) in (select * from t2);
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a1 a2 a3
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select *, (a1, a2, a3) in (select * from t2) as in_res from t1;
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a1 a2 a3 in_res
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1 - 00 2 - 00 3 - 00 NULL
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1 - 01 2 - 01 3 - 01 NULL
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drop table t1, t2;
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-------------------------------
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Part 2: Test cases for bugs.
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-------------------------------
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drop table if exists t1, t2;
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#
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# LP BUG#608744
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#
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set @@optimizer_switch="materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=off";
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create table t1 (a1 char(1), a2 char(1));
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insert into t1 values (NULL, 'b');
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create table t2 (b1 char(1), b2 char(2));
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insert into t2 values ('a','b'), ('c', 'd');
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select * from t1 where (a1, a2) NOT IN (select b1, b2 from t2);
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a1 a2
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drop table t1,t2;
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#
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# LP BUG#601156
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#
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CREATE TABLE t1 (a1 int DEFAULT NULL, a2 int DEFAULT NULL);
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INSERT INTO t1 VALUES (NULL,2);
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INSERT INTO t1 VALUES (4,NULL);
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CREATE TABLE t2 (b1 int DEFAULT NULL, b2 int DEFAULT NULL);
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INSERT INTO t2 VALUES (6,NULL);
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INSERT INTO t2 VALUES (NULL,0);
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set @@optimizer_switch='materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on';
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EXPLAIN EXTENDED
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SELECT * FROM (SELECT * FROM t1 WHERE a1 NOT IN (SELECT b2 FROM t2)) table1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where
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3 SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00
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Warnings:
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Note 1003 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`)))))))
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DROP TABLE t1, t2;
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#
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# LP BUG#613009 Crash in Ordered_key::get_field_idx
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#
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set @@optimizer_switch='materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=off';
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create table t1 (a1 char(3) DEFAULT NULL, a2 char(3) DEFAULT NULL);
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insert into t1 values (NULL, 'a21'), (NULL, 'a22');
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explain select * from t1 where (a1, a2) not in (select a1, a2 from t1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
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2 SUBQUERY t1 ALL NULL NULL NULL NULL 2
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select * from t1 where (a1, a2) not in (select a1, a2 from t1);
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a1 a2
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drop table t1;
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#
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# LP BUG#680058 void Ordered_key::add_key(rownum_t):
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# Assertion `key_buff_elements && cur_key_idx < key_buff_elements' failed
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#
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create table t1 (f1 char(1), f2 char(1));
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insert into t1 values ('t', '0'), ('0', 't');
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create table t2 (f3 char(1), f4 char(1));
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insert into t2 values ('t', NULL), ('t', NULL), ('d', 'y');
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set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,semijoin=off';
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select * from t1 where (f1, f2) not in (select * from t2);
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f1 f2
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0 t
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drop table t1, t2;
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#
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# LP BUG#809245 Second assertion `bit < (map)->n_bits' with partial_match_merge
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#
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CREATE TABLE t1 (d varchar(32)) ;
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INSERT INTO t1 VALUES ('r');
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CREATE TABLE t2 ( a int, c varchar(32)) ;
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INSERT INTO t2 VALUES (5,'r');
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CREATE TABLE t3 ( a int NOT NULL , d varchar(32)) ;
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INSERT INTO t3 VALUES (10,'g');
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set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,in_to_exists=off';
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EXPLAIN SELECT *
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FROM t1
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WHERE (t1.d , t1.d) NOT IN (
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SELECT t3.d , t2.c
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FROM t3 LEFT JOIN t2 ON t3.a = t2.a);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 system NULL NULL NULL NULL 1
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2 SUBQUERY t3 system NULL NULL NULL NULL 1
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2 SUBQUERY t2 system NULL NULL NULL NULL 1
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SELECT *
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FROM t1
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WHERE (t1.d , t1.d) NOT IN (
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SELECT t3.d , t2.c
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FROM t3 LEFT JOIN t2 ON t3.a = t2.a);
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d
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r
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set @@optimizer_switch='materialization=off,in_to_exists=on';
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EXPLAIN SELECT *
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FROM t1
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WHERE (t1.d , t1.d) NOT IN (
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SELECT t3.d , t2.c
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FROM t3 LEFT JOIN t2 ON t3.a = t2.a);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 system NULL NULL NULL NULL 1
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2 DEPENDENT SUBQUERY t3 system NULL NULL NULL NULL 1
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2 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 1
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SELECT *
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FROM t1
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WHERE (t1.d , t1.d) NOT IN (
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SELECT t3.d , t2.c
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FROM t3 LEFT JOIN t2 ON t3.a = t2.a);
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d
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r
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drop table t1, t2, t3;
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#
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# LP BUG#809266 Diverging results with partial_match_rowid_merge=on
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#
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CREATE TABLE t1 (c int) ;
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INSERT INTO t1 VALUES (0),(0);
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CREATE TABLE t2 (a int, b int) ;
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INSERT INTO t2 VALUES (6,3), (9,NULL);
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set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,in_to_exists=off';
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EXPLAIN
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SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT b, a FROM t2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 2
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 2
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SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT b, a FROM t2);
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c
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0
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0
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EXPLAIN
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SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT a, b FROM t2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 2
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 2
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SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT a, b FROM t2);
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c
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0
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0
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set @@optimizer_switch='materialization=off,in_to_exists=on';
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EXPLAIN
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SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT b, a FROM t2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 2
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2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
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SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT b, a FROM t2);
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c
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0
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0
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EXPLAIN
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SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT a, b FROM t2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 2
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2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
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SELECT * FROM t1 WHERE (6, 4 ) NOT IN (SELECT a, b FROM t2);
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c
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0
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0
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drop table t1, t2;
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set @@optimizer_switch=@save_optimizer_switch;
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