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52c29f3bdc
Heap tables are allocated blocks to store rows according to my_default_record_cache (mapped to the server global variable read_buffer_size). This causes performance issues when the record length is big (> 1000 bytes) and the my_default_record_cache is small. Changed to instead split the default heap allocation to 1/16 of the allowed space and not use my_default_record_cache anymore when creating the heap. The allocation is also aligned to be just under a power of 2. For some test that I have been running, which was using record length=633, the speed of the query doubled thanks to this change. Other things: - Fixed calculation of max_records passed to hp_create() to take into account padding between records. - Updated calculation of memory needed by heap tables. Before we did not take into account internal structures needed to access rows. - Changed block sized for memory_table from 1 to 16384 to get less fragmentation. This also avoids a problem where we need 1K to manage index and row storage which was not counted for before. - Moved heap memory usage to a separate test for 32 bit. - Allocate all data blocks in heap in powers of 2. Change reported memory usage for heap to reflect this. Reviewed-by: Sergei Golubchik <serg@mariadb.org>
1187 lines
32 KiB
Text
1187 lines
32 KiB
Text
create table t1 (a int, b int) engine=MyISAM;
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create table t2 (c int, d int) engine=MyISAM;
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create table t3 (e int, f int) engine=MyISAM;
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create table t4 (g int, h int) engine=MyISAM;
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insert into t1 values (1,1),(2,2),(3,3),(2,2),(3,3);
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insert into t2 values (2,2),(3,3),(5,5),(2,2),(2,2),(3,3);
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insert into t3 values (4,4),(2,2),(2,2),(1,1),(3,3);
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insert into t4 values (2,2),(4,4),(1,1);
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create view v0(g, h) as select a,c from t1,t2;
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# test optimization
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select * from t1
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INTERSECT ALL
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select * from t2
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INTERSECT ALL
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select * from t3;
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a b
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2 2
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2 2
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3 3
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EXPLAIN EXTENDED select * from t1
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INTERSECT ALL
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select * from t2
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INTERSECT ALL
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select * from t3;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00
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2 INTERSECT t2 ALL NULL NULL NULL NULL 6 100.00
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3 INTERSECT t3 ALL NULL NULL NULL NULL 5 100.00
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NULL INTERSECT RESULT <intersect1,2,3> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` intersect all /* select#2 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` intersect all /* select#3 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3`
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select * from t1
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INTERSECT ALL
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select * from t2
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INTERSECT ALL
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select * from t3
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INTERSECT
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select * from t1;
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a b
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2 2
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3 3
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EXPLAIN EXTENDED select * from t1
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INTERSECT ALL
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select * from t2
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INTERSECT ALL
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select * from t3
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INTERSECT
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select * from t1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00
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2 INTERSECT t2 ALL NULL NULL NULL NULL 6 100.00
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3 INTERSECT t3 ALL NULL NULL NULL NULL 5 100.00
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4 INTERSECT t1 ALL NULL NULL NULL NULL 5 100.00
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NULL INTERSECT RESULT <intersect1,2,3,4> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` intersect /* select#2 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` intersect /* select#3 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3` intersect /* select#4 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`
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select * from t1
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INTERSECT ALL
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select * from t2
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INTERSECT ALL
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select * from t3
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EXCEPT ALL
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select * from t4;
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a b
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2 2
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3 3
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EXPLAIN EXTENDED select * from t1
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INTERSECT ALL
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select * from t2
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INTERSECT ALL
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select * from t3
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EXCEPT ALL
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select * from t4;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00
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2 INTERSECT t2 ALL NULL NULL NULL NULL 6 100.00
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3 INTERSECT t3 ALL NULL NULL NULL NULL 5 100.00
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4 EXCEPT t4 ALL NULL NULL NULL NULL 3 100.00
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NULL UNIT RESULT <unit1,2,3,4> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` intersect all /* select#2 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` intersect all /* select#3 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3` except all /* select#4 */ select `test`.`t4`.`g` AS `g`,`test`.`t4`.`h` AS `h` from `test`.`t4`
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select * from t1
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INTERSECT
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select * from t2
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EXCEPT ALL
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select * from t4;
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a b
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3 3
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EXPLAIN EXTENDED select * from t1
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INTERSECT
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select * from t2
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EXCEPT ALL
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select * from t4;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00
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2 INTERSECT t2 ALL NULL NULL NULL NULL 6 100.00
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3 EXCEPT t4 ALL NULL NULL NULL NULL 3 100.00
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NULL UNIT RESULT <unit1,2,3> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` intersect /* select#2 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` except /* select#3 */ select `test`.`t4`.`g` AS `g`,`test`.`t4`.`h` AS `h` from `test`.`t4`
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insert into t4 values (1,1),(9,9);
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select * from t1
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UNION ALL
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select * from t2
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UNION ALL
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select * from t3
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EXCEPT
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select * from t4;
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a b
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3 3
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5 5
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EXPLAIN EXTENDED select * from t1
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UNION ALL
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select * from t2
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UNION ALL
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select * from t3
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EXCEPT
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select * from t4;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00
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2 UNION t2 ALL NULL NULL NULL NULL 6 100.00
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3 UNION t3 ALL NULL NULL NULL NULL 5 100.00
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4 EXCEPT t4 ALL NULL NULL NULL NULL 5 100.00
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NULL UNIT RESULT <unit1,2,3,4> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` union /* select#2 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` union /* select#3 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3` except /* select#4 */ select `test`.`t4`.`g` AS `g`,`test`.`t4`.`h` AS `h` from `test`.`t4`
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delete from t4;
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insert into t4 values (3,3),(3,3);
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select * from t1
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INTERSECT ALL
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select * from t2
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UNION ALL
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select * from t3
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EXCEPT ALL
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select * from t1
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UNION
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select * from t4
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EXCEPT
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select * from t3
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UNION ALL
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select * from t1;
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a b
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2 2
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2 2
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1 1
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3 3
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3 3
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EXPLAIN EXTENDED select * from t1
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INTERSECT ALL
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select * from t2
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UNION ALL
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select * from t3
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EXCEPT ALL
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select * from t1
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UNION
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select * from t4
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EXCEPT
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select * from t3
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UNION ALL
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select * from t1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00
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2 INTERSECT t2 ALL NULL NULL NULL NULL 6 100.00
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3 UNION t3 ALL NULL NULL NULL NULL 5 100.00
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4 EXCEPT t1 ALL NULL NULL NULL NULL 5 100.00
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5 UNION t4 ALL NULL NULL NULL NULL 2 100.00
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6 EXCEPT t3 ALL NULL NULL NULL NULL 5 100.00
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7 UNION t1 ALL NULL NULL NULL NULL 5 100.00
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NULL UNIT RESULT <unit1,2,3,4,5,6,7> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` intersect all /* select#2 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` union all /* select#3 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3` except all /* select#4 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` union /* select#5 */ select `test`.`t4`.`g` AS `g`,`test`.`t4`.`h` AS `h` from `test`.`t4` except /* select#6 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3` union all /* select#7 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`
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drop table t4;
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# test optimization with brackets
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(
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(select 1 except select 5 union all select 6)
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union
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(select 2 intersect all select 3 intersect all select 4)
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except
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(select 7 intersect all select 8)
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)
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union all
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(select 9 union all select 10)
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except all
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select 11;
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1
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1
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6
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9
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10
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EXPLAIN EXTENDED (
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(select 1 except select 5 union all select 6)
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union
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(select 2 intersect all select 3 intersect all select 4)
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except
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(select 7 intersect all select 8)
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)
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union all
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(select 9 union all select 10)
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except all
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select 11;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived8> ALL NULL NULL NULL NULL 4 100.00
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8 DERIVED <derived2> ALL NULL NULL NULL NULL 2 100.00
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2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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3 EXCEPT NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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4 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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NULL UNIT RESULT <unit2,3,4> ALL NULL NULL NULL NULL NULL NULL
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9 UNION <derived5> ALL NULL NULL NULL NULL 2 100.00
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5 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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6 INTERSECT NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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7 INTERSECT NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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NULL INTERSECT RESULT <intersect5,6,7> ALL NULL NULL NULL NULL NULL NULL
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12 EXCEPT <derived10> ALL NULL NULL NULL NULL 2 100.00
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10 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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11 INTERSECT NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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NULL INTERSECT RESULT <intersect10,11> ALL NULL NULL NULL NULL NULL NULL
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NULL UNIT RESULT <unit8,9,12> ALL NULL NULL NULL NULL NULL NULL
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15 UNION <derived13> ALL NULL NULL NULL NULL 2 100.00
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13 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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14 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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16 EXCEPT NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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NULL UNIT RESULT <unit1,15,16> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 /* select#1 */ select `__14`.`1` AS `1` from (/* select#8 */ select `__7`.`1` AS `1` from (/* select#2 */ select 1 AS `1` except /* select#3 */ select 5 AS `5` union /* select#4 */ select 6 AS `6`) `__7` union /* select#9 */ select `__8`.`2` AS `2` from (/* select#5 */ select 2 AS `2` intersect /* select#6 */ select 3 AS `3` intersect /* select#7 */ select 4 AS `4`) `__8` except /* select#12 */ select `__11`.`7` AS `7` from (/* select#10 */ select 7 AS `7` intersect /* select#11 */ select 8 AS `8`) `__11`) `__14` union all /* select#15 */ select `__15`.`9` AS `9` from (/* select#13 */ select 9 AS `9` union all /* select#14 */ select 10 AS `10`) `__15` except all /* select#16 */ select 11 AS `11`
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(select 1 union all select 2)
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union
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(select 3 union all select 4);
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1
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1
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2
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3
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4
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EXPLAIN EXTENDED (select 1 union all select 2)
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union
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(select 3 union all select 4);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00
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2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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3 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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6 UNION <derived4> ALL NULL NULL NULL NULL 2 100.00
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4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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5 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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NULL UNION RESULT <union1,6> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 /* select#1 */ select `__5`.`1` AS `1` from (/* select#2 */ select 1 AS `1` union /* select#3 */ select 2 AS `2`) `__5` union /* select#6 */ select `__6`.`3` AS `3` from (/* select#4 */ select 3 AS `3` union /* select#5 */ select 4 AS `4`) `__6`
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(select 1 intersect all select 2)
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except
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select 3;
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1
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EXPLAIN EXTENDED (select 1 intersect all select 2)
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except
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select 3;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00
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2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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3 INTERSECT NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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NULL INTERSECT RESULT <intersect2,3> ALL NULL NULL NULL NULL NULL NULL
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4 EXCEPT NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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NULL EXCEPT RESULT <except1,4> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 /* select#1 */ select `__4`.`1` AS `1` from (/* select#2 */ select 1 AS `1` intersect /* select#3 */ select 2 AS `2`) `__4` except /* select#4 */ select 3 AS `3`
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(select 1 intersect all select 2 intersect all select 3)
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intersect
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(select 4 intersect all select 5);
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1
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EXPLAIN EXTENDED (select 1 intersect all select 2 intersect all select 3)
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intersect
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(select 4 intersect all select 5);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00
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2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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3 INTERSECT NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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4 INTERSECT NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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NULL INTERSECT RESULT <intersect2,3,4> ALL NULL NULL NULL NULL NULL NULL
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7 INTERSECT <derived5> ALL NULL NULL NULL NULL 2 100.00
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5 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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6 INTERSECT NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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NULL INTERSECT RESULT <intersect5,6> ALL NULL NULL NULL NULL NULL NULL
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NULL INTERSECT RESULT <intersect1,7> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 /* select#1 */ select `__6`.`1` AS `1` from (/* select#2 */ select 1 AS `1` intersect /* select#3 */ select 2 AS `2` intersect /* select#4 */ select 3 AS `3`) `__6` intersect /* select#7 */ select `__7`.`4` AS `4` from (/* select#5 */ select 4 AS `4` intersect /* select#6 */ select 5 AS `5`) `__7`
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# test set operations with table value constructor
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(values (1,1),(1,1),(1,1),(2,2),(2,2),(3,3),(9,9))
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INTERSECT ALL
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(values (1,1),(2,2),(2,2),(3,3),(3,3),(3,3),(8,8))
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EXCEPT ALL
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(values (7,7),(1,1));
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1 1
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2 2
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2 2
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3 3
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delete from t1;
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insert into t1 values(1,1),(1,1),(2,2),(4,4),(9,9);
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select * from t1
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UNION ALL
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(values (11,12),(3,3),(2,2),(3,3),(4,4),(8,8))
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INTERSECT
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(values (13,14),(7,7),(2,2),(3,3),(1,1))
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INTERSECT ALL
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(values (15,16),(2,2),(1,1))
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EXCEPT
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(values (17,18),(1,1));
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a b
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2 2
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4 4
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9 9
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# test set operations with derived table
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select * from (
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select * from t1
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UNION ALL
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select * from t2
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)dt1
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INTERSECT ALL
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select * from (
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select * from t2
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EXCEPT ALL
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select * from t3
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)dt2;
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a b
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2 2
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3 3
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5 5
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select * from (
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select * from t1
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UNION ALL
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select * from t3
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)dt1
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EXCEPT ALL
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select * from (
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select * from t2
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INTERSECT ALL
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select * from t2
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)dt2;
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a b
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1 1
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1 1
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4 4
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9 9
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1 1
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4 4
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SELECT * from(
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select * from (
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select * from t1
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UNION ALL
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select * from t2
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)dt1
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INTERSECT ALL
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select * from (
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select * from t2
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EXCEPT ALL
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select * from t3
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)dt2
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)dt3;
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a b
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2 2
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3 3
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5 5
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# integration test
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select * from t1
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UNION ALL
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select * from t2
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INTERSECT ALL
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(values (1,1), (2,2), (2,2), (5,5), (2,2))
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INTERSECT ALL
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select * from (select * from t1 union all select * from t1) sq
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EXCEPT ALL
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select * from t3
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UNION ALL
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select * from t2
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UNION
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select * from t3
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EXCEPT
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select a,c from t1,t2
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UNION ALL
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select * from v0 where g < 4
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UNION ALL
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select * from t3;
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a b
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1 1
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1 2
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3 3
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9 9
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5 5
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4 4
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1 2
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2 2
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1 3
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1 3
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2 3
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1 5
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1 5
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2 5
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1 2
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1 2
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2 2
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1 2
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1 2
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2 2
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1 3
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1 3
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2 3
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4 4
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2 2
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2 2
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1 1
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3 3
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select * from t1
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UNION ALL
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select * from t2
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INTERSECT ALL
|
|
(values (1,1), (2,2), (2,2), (5,5), (2,2))
|
|
INTERSECT ALL
|
|
select * from (select * from t1 union all select * from t1) sq
|
|
EXCEPT ALL
|
|
select * from t3
|
|
UNION ALL
|
|
select * from t2
|
|
UNION
|
|
select * from t3
|
|
EXCEPT
|
|
select a,c from t1,t2
|
|
UNION ALL
|
|
select * from v0 where g < 4
|
|
UNION ALL
|
|
select * from t3
|
|
ORDER BY a;
|
|
a b
|
|
1 1
|
|
1 1
|
|
1 2
|
|
1 2
|
|
1 2
|
|
1 2
|
|
1 2
|
|
1 2
|
|
1 3
|
|
1 3
|
|
1 3
|
|
1 3
|
|
1 5
|
|
1 5
|
|
2 2
|
|
2 2
|
|
2 2
|
|
2 2
|
|
2 2
|
|
2 3
|
|
2 3
|
|
2 5
|
|
3 3
|
|
3 3
|
|
4 4
|
|
4 4
|
|
5 5
|
|
9 9
|
|
select * from (
|
|
select * from t1
|
|
UNION ALL
|
|
select * from t2
|
|
INTERSECT ALL
|
|
(values (1,1), (2,2), (2,2), (5,5), (2,2) )
|
|
INTERSECT ALL
|
|
select * from (select * from t1 union all select * from t1) sq
|
|
EXCEPT ALL
|
|
select * from t3
|
|
UNION ALL
|
|
select * from t2
|
|
UNION
|
|
select * from t3
|
|
EXCEPT
|
|
select a,c from t1,t2
|
|
UNION ALL
|
|
select * from v0 where g < 4
|
|
UNION ALL
|
|
select * from t3
|
|
) dt;
|
|
a b
|
|
1 1
|
|
1 2
|
|
3 3
|
|
9 9
|
|
5 5
|
|
4 4
|
|
1 2
|
|
2 2
|
|
1 3
|
|
1 3
|
|
2 3
|
|
1 5
|
|
1 5
|
|
2 5
|
|
1 2
|
|
1 2
|
|
2 2
|
|
1 2
|
|
1 2
|
|
2 2
|
|
1 3
|
|
1 3
|
|
2 3
|
|
4 4
|
|
2 2
|
|
2 2
|
|
1 1
|
|
3 3
|
|
EXPLAIN
|
|
select * from t1
|
|
UNION ALL
|
|
select * from t2
|
|
INTERSECT ALL
|
|
(values (1,1), (2,2), (2,2), (5,5), (2,2) )
|
|
INTERSECT ALL
|
|
select * from (select * from t1 union all select * from t1) sq
|
|
EXCEPT ALL
|
|
select * from t3
|
|
UNION ALL
|
|
select * from t2
|
|
UNION
|
|
select * from t3
|
|
EXCEPT
|
|
select a,c from t1,t2
|
|
UNION ALL
|
|
select * from v0 where g < 4
|
|
UNION ALL
|
|
select * from t3;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
|
|
8 UNION <derived2> ALL NULL NULL NULL NULL 5
|
|
2 DERIVED t2 ALL NULL NULL NULL NULL 6
|
|
3 INTERSECT NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
4 INTERSECT <derived5> ALL NULL NULL NULL NULL 10
|
|
5 DERIVED t1 ALL NULL NULL NULL NULL 5
|
|
6 UNION t1 ALL NULL NULL NULL NULL 5
|
|
NULL INTERSECT RESULT <intersect2,3,4> ALL NULL NULL NULL NULL NULL
|
|
7 EXCEPT t3 ALL NULL NULL NULL NULL 5
|
|
9 UNION t2 ALL NULL NULL NULL NULL 6
|
|
10 UNION t3 ALL NULL NULL NULL NULL 5
|
|
11 EXCEPT t1 ALL NULL NULL NULL NULL 5
|
|
11 EXCEPT t2 ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join)
|
|
12 UNION t1 ALL NULL NULL NULL NULL 5 Using where
|
|
12 UNION t2 ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join)
|
|
13 UNION t3 ALL NULL NULL NULL NULL 5
|
|
NULL UNIT RESULT <unit1,8,7,9,10,11,12,13> ALL NULL NULL NULL NULL NULL
|
|
EXPLAIN format=json
|
|
select * from t1
|
|
UNION ALL
|
|
select * from t2
|
|
INTERSECT ALL
|
|
(values (1,1), (2,2), (2,2), (5,5), (2,2) )
|
|
INTERSECT ALL
|
|
select * from (select * from t1 union all select * from t1) sq
|
|
EXCEPT ALL
|
|
select * from t3
|
|
UNION ALL
|
|
select * from t2
|
|
UNION
|
|
select * from t3
|
|
EXCEPT
|
|
select a,c from t1,t2
|
|
UNION ALL
|
|
select * from v0 where g < 4
|
|
UNION ALL
|
|
select * from t3;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<unit1,8,7,9,10,11,12,13>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 8,
|
|
"operation": "UNION",
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"table_name": "<intersect2,3,4>",
|
|
"access_type": "ALL",
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 6,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 3,
|
|
"operation": "INTERSECT",
|
|
"table": {
|
|
"message": "No tables used"
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 4,
|
|
"operation": "INTERSECT",
|
|
"table": {
|
|
"table_name": "<derived5>",
|
|
"access_type": "ALL",
|
|
"rows": 10,
|
|
"filtered": 100,
|
|
"materialized": {
|
|
"query_block": {
|
|
"union_result": {
|
|
"query_specifications": [
|
|
{
|
|
"query_block": {
|
|
"select_id": 5,
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 6,
|
|
"operation": "UNION",
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 7,
|
|
"operation": "EXCEPT",
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 9,
|
|
"operation": "UNION",
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 6,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 10,
|
|
"operation": "UNION",
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 11,
|
|
"operation": "EXCEPT",
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
},
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 6,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "65",
|
|
"join_type": "BNL"
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 12,
|
|
"operation": "UNION",
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100,
|
|
"attached_condition": "t1.a < 4"
|
|
},
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ALL",
|
|
"rows": 6,
|
|
"filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "65",
|
|
"join_type": "BNL"
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"query_block": {
|
|
"select_id": 13,
|
|
"operation": "UNION",
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ALL",
|
|
"rows": 5,
|
|
"filtered": 100
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
EXPLAIN EXTENDED
|
|
select * from t1
|
|
UNION ALL
|
|
select * from t2
|
|
INTERSECT ALL
|
|
(values (1,1), (2,2), (2,2), (5,5), (2,2) )
|
|
INTERSECT ALL
|
|
select * from (select * from t1 union all select * from t1) sq
|
|
EXCEPT ALL
|
|
select * from t3
|
|
UNION ALL
|
|
select * from t2
|
|
UNION
|
|
select * from t3
|
|
EXCEPT
|
|
select a,c from t1,t2
|
|
UNION ALL
|
|
select * from v0 where g < 4
|
|
UNION ALL
|
|
select * from t3;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00
|
|
8 UNION <derived2> ALL NULL NULL NULL NULL 5 100.00
|
|
2 DERIVED t2 ALL NULL NULL NULL NULL 6 100.00
|
|
3 INTERSECT NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
4 INTERSECT <derived5> ALL NULL NULL NULL NULL 10 100.00
|
|
5 DERIVED t1 ALL NULL NULL NULL NULL 5 100.00
|
|
6 UNION t1 ALL NULL NULL NULL NULL 5 100.00
|
|
NULL INTERSECT RESULT <intersect2,3,4> ALL NULL NULL NULL NULL NULL NULL
|
|
7 EXCEPT t3 ALL NULL NULL NULL NULL 5 100.00
|
|
9 UNION t2 ALL NULL NULL NULL NULL 6 100.00
|
|
10 UNION t3 ALL NULL NULL NULL NULL 5 100.00
|
|
11 EXCEPT t1 ALL NULL NULL NULL NULL 5 100.00
|
|
11 EXCEPT t2 ALL NULL NULL NULL NULL 6 100.00 Using join buffer (flat, BNL join)
|
|
12 UNION t1 ALL NULL NULL NULL NULL 5 100.00 Using where
|
|
12 UNION t2 ALL NULL NULL NULL NULL 6 100.00 Using join buffer (flat, BNL join)
|
|
13 UNION t3 ALL NULL NULL NULL NULL 5 100.00
|
|
NULL UNIT RESULT <unit1,8,7,9,10,11,12,13> ALL NULL NULL NULL NULL NULL NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` union all /* select#8 */ select `__8`.`c` AS `c`,`__8`.`d` AS `d` from (/* select#2 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` intersect all (values (1,1),(2,2),(2,2),(5,5),(2,2)) intersect all /* select#4 */ select `sq`.`a` AS `a`,`sq`.`b` AS `b` from (/* select#5 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` union all /* select#6 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) `sq`) `__8` except all /* select#7 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3` union /* select#9 */ select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` union /* select#10 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3` except /* select#11 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`c` AS `c` from `test`.`t1` join `test`.`t2` union all /* select#12 */ select `test`.`t1`.`a` AS `g`,`test`.`t2`.`c` AS `h` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a` < 4 union all /* select#13 */ select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3`
|
|
PREPARE stmt from"
|
|
select * from t1
|
|
UNION ALL
|
|
select * from t2
|
|
INTERSECT ALL
|
|
(values (1,1), (2,2), (2,2), (5,5), (2,2) )
|
|
INTERSECT ALL
|
|
select * from (select * from t1 union all select * from t1) sq
|
|
EXCEPT ALL
|
|
select * from t3
|
|
UNION ALL
|
|
select * from t2
|
|
UNION
|
|
select * from t3
|
|
EXCEPT
|
|
select a,c from t1,t2
|
|
UNION ALL
|
|
select * from v0 where g < 4
|
|
UNION ALL
|
|
select * from t3
|
|
";
|
|
EXECUTE stmt;
|
|
a b
|
|
1 1
|
|
1 2
|
|
3 3
|
|
9 9
|
|
5 5
|
|
4 4
|
|
1 2
|
|
2 2
|
|
1 3
|
|
1 3
|
|
2 3
|
|
1 5
|
|
1 5
|
|
2 5
|
|
1 2
|
|
1 2
|
|
2 2
|
|
1 2
|
|
1 2
|
|
2 2
|
|
1 3
|
|
1 3
|
|
2 3
|
|
4 4
|
|
2 2
|
|
2 2
|
|
1 1
|
|
3 3
|
|
EXECUTE stmt;
|
|
a b
|
|
1 1
|
|
1 2
|
|
3 3
|
|
9 9
|
|
5 5
|
|
4 4
|
|
1 2
|
|
2 2
|
|
1 3
|
|
1 3
|
|
2 3
|
|
1 5
|
|
1 5
|
|
2 5
|
|
1 2
|
|
1 2
|
|
2 2
|
|
1 2
|
|
1 2
|
|
2 2
|
|
1 3
|
|
1 3
|
|
2 3
|
|
4 4
|
|
2 2
|
|
2 2
|
|
1 1
|
|
3 3
|
|
deallocate prepare stmt;
|
|
create view v1(i1, i2) as
|
|
select * from t1
|
|
UNION ALL
|
|
select * from t2
|
|
INTERSECT ALL
|
|
(values (1,1), (2,2), (2,2), (5,5), (2,2) )
|
|
INTERSECT ALL
|
|
select * from (select * from t1 union all select * from t1) sq
|
|
EXCEPT ALL
|
|
select * from t3
|
|
UNION ALL
|
|
select * from t2
|
|
UNION
|
|
select * from t3
|
|
EXCEPT
|
|
select a,c from t1,t2
|
|
UNION ALL
|
|
select * from v0 where g < 4
|
|
UNION ALL
|
|
select * from t3;
|
|
show create view v1;
|
|
View Create View character_set_client collation_connection
|
|
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`a` AS `i1`,`t1`.`b` AS `i2` from `t1` union all select `__9`.`c` AS `c`,`__9`.`d` AS `d` from (select `t2`.`c` AS `c`,`t2`.`d` AS `d` from `t2` intersect all (values (1,1),(2,2),(2,2),(5,5),(2,2)) intersect all select `sq`.`a` AS `a`,`sq`.`b` AS `b` from (select `t1`.`a` AS `a`,`t1`.`b` AS `b` from `t1` union all select `t1`.`a` AS `a`,`t1`.`b` AS `b` from `t1`) `sq`) `__9` except all select `t3`.`e` AS `e`,`t3`.`f` AS `f` from `t3` union all select `t2`.`c` AS `c`,`t2`.`d` AS `d` from `t2` union select `t3`.`e` AS `e`,`t3`.`f` AS `f` from `t3` except select `t1`.`a` AS `a`,`t2`.`c` AS `c` from (`t1` join `t2`) union all select `v0`.`g` AS `g`,`v0`.`h` AS `h` from `v0` where `v0`.`g` < 4 union all select `t3`.`e` AS `e`,`t3`.`f` AS `f` from `t3` latin1 latin1_swedish_ci
|
|
select * from v1 limit 14;
|
|
i1 i2
|
|
1 1
|
|
1 2
|
|
3 3
|
|
9 9
|
|
5 5
|
|
4 4
|
|
1 2
|
|
2 2
|
|
1 3
|
|
1 3
|
|
2 3
|
|
1 5
|
|
1 5
|
|
2 5
|
|
select * from v1 order by i1 limit 14;
|
|
i1 i2
|
|
1 1
|
|
1 1
|
|
1 2
|
|
1 2
|
|
1 2
|
|
1 2
|
|
1 2
|
|
1 2
|
|
1 3
|
|
1 3
|
|
1 3
|
|
1 3
|
|
1 5
|
|
1 5
|
|
drop table t1,t2,t3;
|
|
drop view v0,v1;
|
|
# compare result
|
|
create table t1 (a int, b int);
|
|
create table t2 (c int, d int);
|
|
create table t3 (e int, f int);
|
|
create table t4 (g int, h int);
|
|
insert into t1 values (1,1),(1,1),(2,2);
|
|
insert into t2 values (1,1),(1,1),(2,2),(3,3);
|
|
insert into t3 values (1,1);
|
|
insert into t4 values (4,4);
|
|
select * from t1 intersect all select * from t2 except select * from t3 union select * from t4;
|
|
a b
|
|
4 4
|
|
2 2
|
|
select * from t1 intersect all select * from t2 except ALL select * from t3 union select * from t4;
|
|
a b
|
|
1 1
|
|
2 2
|
|
4 4
|
|
select * from t1 intersect DISTINCT select * from t2 except select * from t3 union select * from t4;
|
|
a b
|
|
4 4
|
|
2 2
|
|
select * from t1 intersect DISTINCT select * from t2 except ALL select * from t3 union select * from t4;
|
|
a b
|
|
4 4
|
|
2 2
|
|
delete from t1;
|
|
delete from t2;
|
|
delete from t3;
|
|
delete from t4;
|
|
insert into t1 values (1,1),(1,1),(1,1),(2,2),(2,2),(4,4),(5,5);
|
|
insert into t2 values (1,1),(1,1),(1,1),(2,2),(2,2),(3,3);
|
|
insert into t3 values (1,1),(2,2),(2,2);
|
|
select * from t1 intersect all select * from t2 intersect all select * from t3;
|
|
a b
|
|
1 1
|
|
2 2
|
|
2 2
|
|
select * from t1 intersect all select * from t2 intersect select * from t3;
|
|
a b
|
|
1 1
|
|
2 2
|
|
select * from t1 intersect all select * from t1 intersect all select * from t2 intersect select * from t3;
|
|
a b
|
|
1 1
|
|
2 2
|
|
delete from t1;
|
|
delete from t2;
|
|
delete from t3;
|
|
insert into t1 values (1,1),(1,1),(2,2);
|
|
insert into t2 values (1,1),(1,1),(2,2),(3,3);
|
|
insert into t3 values (1,1),(5,5);
|
|
insert into t4 values (4,4),(4,4),(4,4);
|
|
select * from t1 intersect all select * from t2 union all select * from t3 union select * from t4;
|
|
a b
|
|
1 1
|
|
2 2
|
|
5 5
|
|
4 4
|
|
select * from t1 intersect DISTINCT select * from t2 union DISTINCT select * from t3 union select * from t4;
|
|
a b
|
|
1 1
|
|
2 2
|
|
5 5
|
|
4 4
|
|
select * from t1 intersect all select * from t2 intersect all select * from t3 union select * from t4;
|
|
a b
|
|
1 1
|
|
4 4
|
|
select * from t1 intersect all select * from t2 intersect DISTINCT select * from t3 union select * from t4;
|
|
a b
|
|
1 1
|
|
4 4
|
|
select * from t1 intersect DISTINCT select * from t2 intersect DISTINCT select * from t3 union select * from t4;
|
|
a b
|
|
1 1
|
|
4 4
|
|
select * from t1 intersect all select * from t2 EXCEPT select * from t3 union select * from t4;
|
|
a b
|
|
4 4
|
|
2 2
|
|
select * from t1 intersect DISTINCT select * from t2 EXCEPT select * from t3 union select * from t4;
|
|
a b
|
|
4 4
|
|
2 2
|
|
select * from t1 intersect all select * from t2 EXCEPT ALL select * from t3 union select * from t4;
|
|
a b
|
|
1 1
|
|
2 2
|
|
4 4
|
|
select * from t1 EXCEPT select * from t2 union all select * from t3 union select * from t4;
|
|
a b
|
|
5 5
|
|
1 1
|
|
4 4
|
|
select * from t1 EXCEPT select * from t2 union DISTINCT select * from t3 union select * from t4;
|
|
a b
|
|
5 5
|
|
1 1
|
|
4 4
|
|
delete from t1;
|
|
delete from t2;
|
|
delete from t3;
|
|
delete from t4;
|
|
insert into t1 values (1,1),(2,2);
|
|
insert into t2 values (1,1),(2,2);
|
|
insert into t3 values (1,1),(3,3);
|
|
select * from t1 union all select * from t2 except all select * from t3;
|
|
a b
|
|
1 1
|
|
2 2
|
|
2 2
|
|
select * from t1 union all select * from t2 except DISTINCT select * from t3;
|
|
a b
|
|
2 2
|
|
select * from t1 union DISTINCT select * from t2 except all select * from t3;
|
|
a b
|
|
2 2
|
|
select * from t1 union DISTINCT select * from t2 except DISTINCT select * from t3;
|
|
a b
|
|
2 2
|
|
drop table t1;
|
|
drop table t2;
|
|
drop table t3;
|
|
drop table t4;
|
|
select 1 intersect all select 2 intersect all select 3 intersect select 4 union select 5;
|
|
1
|
|
5
|
|
select 1 intersect all select 2 intersect all select 3 union select 4 except select 5;
|
|
1
|
|
4
|
|
select 1 union select 2 except all select 3 union select 4;
|
|
1
|
|
1
|
|
2
|
|
4
|
|
select 1 union all select 2 union all select 3 union select 4;
|
|
1
|
|
1
|
|
2
|
|
3
|
|
4
|
|
# test with limited resource
|
|
set @@max_heap_table_size= 16384;
|
|
set @@tmp_table_size= 16384;
|
|
create table t1 (a int, b int);
|
|
insert into t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9),(0,0);
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select a+100, b+100 from t1;
|
|
create table t2 (a int, b int);
|
|
insert into t2 values (10,10),(11,11),(12,12),(13,13),(14,14),(5,5),(6,6),(7,7),(8,8),(9,9);
|
|
insert into t2 select * from t2;
|
|
insert into t2 select * from t2;
|
|
insert into t2 select * from t2;
|
|
insert into t2 select a+100, b+100 from t2;
|
|
select count(*) from
|
|
(
|
|
select * from t1
|
|
INTERSECT ALL
|
|
select * from t2
|
|
) c;
|
|
count(*)
|
|
80
|
|
select count(*) from
|
|
(
|
|
select * from t1
|
|
EXCEPT ALL
|
|
select * from t2
|
|
) c;
|
|
count(*)
|
|
80
|
|
select count(*) from
|
|
(
|
|
select * from t1
|
|
INTERSECT ALL
|
|
select * from t2
|
|
UNION ALL
|
|
select * from t1
|
|
EXCEPT ALL
|
|
select * from t2
|
|
) c;
|
|
count(*)
|
|
160
|
|
delete from t1;
|
|
delete from t2;
|
|
insert into t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9),(0,0);
|
|
insert into t1 select a+10, b+10 from t1;
|
|
insert into t1 select a+20, b+20 from t1;
|
|
insert into t1 select a+40, b+40 from t1;
|
|
insert into t1 select a+80, b+80 from t1;
|
|
insert into t2 values (1110,1110),(1111,1111),(1112,1112),(1113,1113),(1114,1114),(1105,1105),(1106,1106),(1107,1107),(1108,1108),(1109,1109);
|
|
insert into t2 select a+10, b+10 from t2;
|
|
insert into t2 select a+20, b+20 from t2;
|
|
insert into t2 select a+40, b+40 from t2;
|
|
insert into t2 select a+80, b+80 from t2;
|
|
select count(*) from
|
|
(
|
|
select * from t1
|
|
UNION ALL
|
|
select * from t2
|
|
EXCEPT ALL
|
|
values (1,1)
|
|
) c;
|
|
count(*)
|
|
319
|
|
drop table t1;
|
|
drop table t2;
|
|
#
|
|
# MDEV-24242: set expression with empty intermediate result
|
|
# when tmp_memory_table_size is set to 0
|
|
#
|
|
create table t1 (a int, b int) engine=MyISAM;
|
|
insert into t1 values (1,1), (2,2);
|
|
create table t2 (a int, b int) engine=MyISAM;
|
|
insert into t2 values (11,11), (12,12), (13,13);
|
|
select * from t1
|
|
except all
|
|
select * from t1
|
|
except
|
|
select * from t1
|
|
union all
|
|
select * from t2;
|
|
a b
|
|
12 12
|
|
11 11
|
|
13 13
|
|
set tmp_memory_table_size=0;
|
|
select * from t1
|
|
except all
|
|
select * from t1
|
|
except
|
|
select * from t1
|
|
union all
|
|
select * from t2;
|
|
a b
|
|
12 12
|
|
11 11
|
|
13 13
|
|
set tmp_memory_table_size=default;
|
|
drop table t1,t2;
|
|
# End of 10.4 tests
|