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b8f00542e2
- In join buffering code, call join_tab_execution_startup() (#1) before we call join_tab_scan->open() (#2). This is important with SJ-Materialization because #1 fills the materialized table, while #2 will actually try to read the first row. Attempt to read the first row before we have populated the materialized table would cause zero rows to be returned when actually there were matches.
1437 lines
89 KiB
Text
1437 lines
89 KiB
Text
set @@optimizer_switch='semijoin=off';
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set optimizer_switch='firstmatch=off';
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drop table if exists t1, t2, t3, t1i, t2i, t3i;
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drop view if exists v1, v2, v1m, v2m;
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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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create table t3 (c1 char(8), c2 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 t1 values ('1 - 02', '2 - 02');
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insert into t2 values ('1 - 01', '2 - 01');
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insert into t2 values ('1 - 01', '2 - 01');
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insert into t2 values ('1 - 02', '2 - 02');
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insert into t2 values ('1 - 02', '2 - 02');
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insert into t2 values ('1 - 03', '2 - 03');
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insert into t3 values ('1 - 01', '2 - 01');
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insert into t3 values ('1 - 02', '2 - 02');
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insert into t3 values ('1 - 03', '2 - 03');
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insert into t3 values ('1 - 04', '2 - 04');
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create table t1i (a1 char(8), a2 char(8));
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create table t2i (b1 char(8), b2 char(8));
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create table t3i (c1 char(8), c2 char(8));
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create index it1i1 on t1i (a1);
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create index it1i2 on t1i (a2);
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create index it1i3 on t1i (a1, a2);
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create index it2i1 on t2i (b1);
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create index it2i2 on t2i (b2);
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create index it2i3 on t2i (b1, b2);
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create index it3i1 on t3i (c1);
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create index it3i2 on t3i (c2);
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create index it3i3 on t3i (c1, c2);
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insert into t1i select * from t1;
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insert into t2i select * from t2;
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insert into t3i select * from t3;
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/******************************************************************************
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* Simple tests.
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******************************************************************************/
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# non-indexed nullable fields
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explain extended
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select * from t1 where a1 in (select b1 from t2 where b1 > '0');
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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 3 100.00 Using where
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
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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 <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (select `test`.`t2`.`b1` from `test`.`t2` where (`test`.`t2`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`))))))
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select * from t1 where a1 in (select b1 from t2 where b1 > '0');
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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explain extended
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select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
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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 3 100.00 Using where
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary; Using filesort
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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 <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (select `test`.`t2`.`b1` from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`))))))
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select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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explain extended
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select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2);
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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 3 100.00 Using where
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary; Using filesort
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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 <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`))))))
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select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2);
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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explain extended
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select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1);
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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 3 100.00 Using where
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary; Using filesort
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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 <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,min(`test`.`t2`.`b2`) from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`min(b2)`))))))
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select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1);
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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explain extended
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select * from t1i where a1 in (select b1 from t2i where b1 > '0');
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1i index NULL _it1_idx # NULL 3 100.00 Using where;
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2 SUBQUERY t2i index it2i1,it2i3 it2i1 # NULL 5 100.00 Using where;
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Warnings:
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Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a1`>(<in_optimizer>(`test`.`t1i`.`a1`,`test`.`t1i`.`a1` in ( <materialize> (select `test`.`t2i`.`b1` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`))))))
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select * from t1i where a1 in (select b1 from t2i where b1 > '0');
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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explain extended
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select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1i index NULL # 18 # 3 100.00 #
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2 SUBQUERY t2i range it2i1,it2i3 # 9 # 3 100.00 #
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Warnings:
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Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a1`>(<in_optimizer>(`test`.`t1i`.`a1`,`test`.`t1i`.`a1` in ( <materialize> (select `test`.`t2i`.`b1` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`))))))
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select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1);
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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explain extended
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select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0');
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1i index NULL _it1_idx # NULL 3 100.00 Using where;
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2 SUBQUERY t2i index it2i1,it2i3 it2i3 # NULL 5 100.00 Using where;
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Warnings:
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Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`b2`))))))
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select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0');
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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explain extended
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select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1i index NULL # # # 3 100.00 #
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2 SUBQUERY t2i range it2i1,it2i3 # # # 3 100.00 #
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Warnings:
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Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1`,`test`.`t2i`.`b2` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`b2`))))))
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select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2);
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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explain extended
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select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1i index NULL # # # 3 100.00 #
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2 SUBQUERY t2i range it2i1,it2i3 # # # 3 100.00 #
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Warnings:
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Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`min(b2)`))))))
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select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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explain extended
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select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1);
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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 3 100.00 Using where
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2 SUBQUERY t2i range NULL it2i3 9 NULL 3 100.00 Using index for group-by
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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 <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,max(`test`.`t2i`.`b2`) from `test`.`t2i` group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`max(b2)`))))))
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select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1);
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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prepare st1 from "explain select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)";
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execute st1;
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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 3 Using where
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2 SUBQUERY t2i range NULL it2i3 9 NULL 3 Using index for group-by
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execute st1;
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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 3 Using where
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2 SUBQUERY t2i range NULL it2i3 9 NULL 3 Using index for group-by
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prepare st2 from "select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)";
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execute st2;
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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execute st2;
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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explain extended
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select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
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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 3 100.00 Using where
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2 SUBQUERY t2i range it2i1,it2i3 it2i3 18 NULL 3 100.00 Using where; Using index for group-by
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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 <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`min(b2)`))))))
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select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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select * from t1 where (a1, a2) in (select b1, min(b2) from t2i limit 1,1);
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ERROR 42000: This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
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set @save_optimizer_switch=@@optimizer_switch;
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set @@optimizer_switch='default,semijoin=off';
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prepare st1 from
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"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
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set @@optimizer_switch='default,materialization=off';
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execute st1;
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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set @@optimizer_switch='default,semijoin=off';
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execute st1;
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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set @@optimizer_switch='default,materialization=off';
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prepare st1 from
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"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
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set @@optimizer_switch='default,semijoin=off';
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execute st1;
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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set @@optimizer_switch='default,materialization=off';
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execute st1;
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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set @@optimizer_switch=@save_optimizer_switch;
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explain extended
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select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2);
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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 3 100.00 Using where
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00
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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 <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` order by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`))))))
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select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2);
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a1 a2
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1 - 01 2 - 01
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1 - 02 2 - 02
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explain extended
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select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index
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2 SUBQUERY t2i index NULL it2i3 18 NULL 5 100.00 Using index
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Warnings:
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Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` order by `test`.`t2i`.`b1`,`test`.`t2i`.`b2` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`b2`))))))
|
|
select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2);
|
|
a1 a2
|
|
1 - 01 2 - 01
|
|
1 - 02 2 - 02
|
|
/******************************************************************************
|
|
* Views, UNIONs, several levels of nesting.
|
|
******************************************************************************/
|
|
# materialize the result of subquery over temp-table view
|
|
create algorithm=merge view v1 as
|
|
select b1, c2 from t2, t3 where b2 > c2;
|
|
create algorithm=merge view v2 as
|
|
select b1, c2 from t2, t3 group by b2, c2;
|
|
Warnings:
|
|
Warning 1354 View merge algorithm can't be used here for now (assumed undefined algorithm)
|
|
create algorithm=temptable view v1m as
|
|
select b1, c2 from t2, t3 where b2 > c2;
|
|
create algorithm=temptable view v2m as
|
|
select b1, c2 from t2, t3 group by b2, c2;
|
|
select * from v1 where (c2, b1) in (select c2, b1 from v2 where b1 is not null);
|
|
b1 c2
|
|
1 - 02 2 - 01
|
|
1 - 02 2 - 01
|
|
1 - 03 2 - 01
|
|
1 - 03 2 - 02
|
|
select * from v1 where (c2, b1) in (select distinct c2, b1 from v2 where b1 is not null);
|
|
b1 c2
|
|
1 - 02 2 - 01
|
|
1 - 02 2 - 01
|
|
1 - 03 2 - 01
|
|
1 - 03 2 - 02
|
|
select * from v1m where (c2, b1) in (select c2, b1 from v2m where b1 is not null);
|
|
b1 c2
|
|
1 - 02 2 - 01
|
|
1 - 02 2 - 01
|
|
1 - 03 2 - 01
|
|
1 - 03 2 - 02
|
|
select * from v1m where (c2, b1) in (select distinct c2, b1 from v2m where b1 is not null);
|
|
b1 c2
|
|
1 - 02 2 - 01
|
|
1 - 02 2 - 01
|
|
1 - 03 2 - 01
|
|
1 - 03 2 - 02
|
|
drop view v1, v2, v1m, v2m;
|
|
explain extended
|
|
select * from t1
|
|
where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and
|
|
(a1, a2) in (select c1, c2 from t3
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
3 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
4 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index
|
|
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (`test`.`t2`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery4>`.`b1`) and (`test`.`t3`.`c2` = `<subquery4>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery3>`.`c1`) and (`test`.`t1`.`a2` = `<subquery3>`.`c2`)))))))
|
|
select * from t1
|
|
where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and
|
|
(a1, a2) in (select c1, c2 from t3
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
|
a1 a2
|
|
1 - 01 2 - 01
|
|
1 - 02 2 - 02
|
|
explain extended
|
|
select * from t1i
|
|
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
|
|
(a1, a2) in (select c1, c2 from t3i
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1i index NULL # # # 3 100.00 #
|
|
3 SUBQUERY t3i index NULL # # # 4 100.00 #
|
|
4 SUBQUERY t2i index it2i2 # # # 5 100.00 #
|
|
2 SUBQUERY t2i index it2i1,it2i3 # # # 5 100.00 #
|
|
Warnings:
|
|
Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where (<expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`b2`)))))) and <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t3i`.`c1`,`test`.`t3i`.`c2` from `test`.`t3i` where <expr_cache><`test`.`t3i`.`c2`,`test`.`t3i`.`c1`>(<in_optimizer>((`test`.`t3i`.`c1`,`test`.`t3i`.`c2`),(`test`.`t3i`.`c1`,`test`.`t3i`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3i`.`c1` in <temporary table> on distinct_key where ((`test`.`t3i`.`c1` = `<subquery4>`.`b1`) and (`test`.`t3i`.`c2` = `<subquery4>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery3>`.`c1`) and (`test`.`t1i`.`a2` = `<subquery3>`.`c2`)))))))
|
|
select * from t1i
|
|
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
|
|
(a1, a2) in (select c1, c2 from t3i
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
|
a1 a2
|
|
1 - 01 2 - 01
|
|
1 - 02 2 - 02
|
|
explain extended
|
|
select * from t1
|
|
where (a1, a2) in (select b1, b2 from t2
|
|
where b2 in (select c2 from t3 where c2 LIKE '%02') or
|
|
b2 in (select c2 from t3 where c2 LIKE '%03')) and
|
|
(a1, a2) in (select c1, c2 from t3
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
5 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
6 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index
|
|
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
|
|
4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
3 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery3>`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery6>`.`b1`) and (`test`.`t3`.`c2` = `<subquery6>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery5>`.`c1`) and (`test`.`t1`.`a2` = `<subquery5>`.`c2`)))))))
|
|
select * from t1
|
|
where (a1, a2) in (select b1, b2 from t2
|
|
where b2 in (select c2 from t3 where c2 LIKE '%02') or
|
|
b2 in (select c2 from t3 where c2 LIKE '%03')) and
|
|
(a1, a2) in (select c1, c2 from t3
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
|
a1 a2
|
|
1 - 02 2 - 02
|
|
explain extended
|
|
select * from t1
|
|
where (a1, a2) in (select b1, b2 from t2
|
|
where b2 in (select c2 from t3 t3a where c1 = a1) or
|
|
b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
|
|
(a1, a2) in (select c1, c2 from t3 t3c
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
5 SUBQUERY t3c ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
6 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index
|
|
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
|
|
4 SUBQUERY t3b ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
3 DEPENDENT SUBQUERY t3a ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
Warnings:
|
|
Note 1276 Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1
|
|
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(select 1 from `test`.`t3` `t3a` where ((`test`.`t3a`.`c1` = `test`.`t1`.`a1`) and (<cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where (`test`.`t3b`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where <expr_cache><`test`.`t3c`.`c2`,`test`.`t3c`.`c1`>(<in_optimizer>((`test`.`t3c`.`c1`,`test`.`t3c`.`c2`),(`test`.`t3c`.`c1`,`test`.`t3c`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3c`.`c1` in <temporary table> on distinct_key where ((`test`.`t3c`.`c1` = `<subquery6>`.`b1`) and (`test`.`t3c`.`c2` = `<subquery6>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery5>`.`c1`) and (`test`.`t1`.`a2` = `<subquery5>`.`c2`)))))))
|
|
select * from t1
|
|
where (a1, a2) in (select b1, b2 from t2
|
|
where b2 in (select c2 from t3 t3a where c1 = a1) or
|
|
b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
|
|
(a1, a2) in (select c1, c2 from t3 t3c
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
|
a1 a2
|
|
1 - 01 2 - 01
|
|
1 - 02 2 - 02
|
|
explain extended
|
|
(select * from t1
|
|
where (a1, a2) in (select b1, b2 from t2
|
|
where b2 in (select c2 from t3 where c2 LIKE '%02') or
|
|
b2 in (select c2 from t3 where c2 LIKE '%03')
|
|
group by b1, b2) and
|
|
(a1, a2) in (select c1, c2 from t3
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')))
|
|
UNION
|
|
(select * from t1i
|
|
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
|
|
(a1, a2) in (select c1, c2 from t3i
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL # # # 3 100.00 #
|
|
5 SUBQUERY t3 ALL NULL # # # 4 100.00 #
|
|
6 SUBQUERY t2i index it2i2 # # # 5 100.00 #
|
|
2 SUBQUERY t2 ALL NULL # # # 5 100.00 #
|
|
4 SUBQUERY t3 ALL NULL # # # 4 100.00 #
|
|
3 SUBQUERY t3 ALL NULL # # # 4 100.00 #
|
|
7 UNION t1i index NULL # # # 3 100.00 #
|
|
9 SUBQUERY t3i index NULL # # # 4 100.00 #
|
|
10 SUBQUERY t2i index it2i2 # # # 5 100.00 #
|
|
8 SUBQUERY t2i index it2i1,it2i3 # # # 5 100.00 #
|
|
NULL UNION RESULT <union1,7> ALL NULL # # # NULL NULL #
|
|
Warnings:
|
|
Note 1003 (select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery3>`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) group by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery6>`.`b1`) and (`test`.`t3`.`c2` = `<subquery6>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery5>`.`c1`) and (`test`.`t1`.`a2` = `<subquery5>`.`c2`)))))))) union (select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where (<expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery8>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery8>`.`b2`)))))) and <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t3i`.`c1`,`test`.`t3i`.`c2` from `test`.`t3i` where <expr_cache><`test`.`t3i`.`c2`,`test`.`t3i`.`c1`>(<in_optimizer>((`test`.`t3i`.`c1`,`test`.`t3i`.`c2`),(`test`.`t3i`.`c1`,`test`.`t3i`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3i`.`c1` in <temporary table> on distinct_key where ((`test`.`t3i`.`c1` = `<subquery10>`.`b1`) and (`test`.`t3i`.`c2` = `<subquery10>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery9>`.`c1`) and (`test`.`t1i`.`a2` = `<subquery9>`.`c2`))))))))
|
|
(select * from t1
|
|
where (a1, a2) in (select b1, b2 from t2
|
|
where b2 in (select c2 from t3 where c2 LIKE '%02') or
|
|
b2 in (select c2 from t3 where c2 LIKE '%03')
|
|
group by b1, b2) and
|
|
(a1, a2) in (select c1, c2 from t3
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')))
|
|
UNION
|
|
(select * from t1i
|
|
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
|
|
(a1, a2) in (select c1, c2 from t3i
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')));
|
|
a1 a2
|
|
1 - 02 2 - 02
|
|
1 - 01 2 - 01
|
|
explain extended
|
|
select * from t1
|
|
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
|
|
(a1, a2) in (select c1, c2 from t3
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
5 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index
|
|
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery5>`.`b1`) and (`test`.`t3`.`c2` = `<subquery5>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery4>`.`c1`) and (`test`.`t1`.`a2` = `<subquery4>`.`c2`)))))))
|
|
select * from t1
|
|
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
|
|
(a1, a2) in (select c1, c2 from t3
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
|
a1 a2
|
|
1 - 01 2 - 01
|
|
1 - 02 2 - 02
|
|
explain extended
|
|
select * from t1, t3
|
|
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
|
|
(c1, c2) in (select c1, c2 from t3
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and
|
|
a1 = c1;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join)
|
|
4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
5 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index
|
|
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`c1` = `test`.`t1`.`a1`) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery5>`.`b1`) and (`test`.`t3`.`c2` = `<subquery5>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery4>`.`c1`) and (`test`.`t3`.`c2` = `<subquery4>`.`c2`)))))))
|
|
select * from t1, t3
|
|
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
|
|
(c1, c2) in (select c1, c2 from t3
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and
|
|
a1 = c1;
|
|
a1 a2 c1 c2
|
|
1 - 01 2 - 01 1 - 01 2 - 01
|
|
1 - 02 2 - 02 1 - 02 2 - 02
|
|
/******************************************************************************
|
|
* Negative tests, where materialization should not be applied.
|
|
******************************************************************************/
|
|
# UNION in a subquery
|
|
explain extended
|
|
select * from t3
|
|
where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where
|
|
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
|
|
Warnings:
|
|
Note 1003 select `test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c1`>(<in_optimizer>(`test`.`t3`.`c1`,<exists>(select 1 from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t3`.`c1`) = `test`.`t1`.`a1`)) union select 1 from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t3`.`c1`) = `test`.`t2`.`b1`)))))
|
|
select * from t3
|
|
where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9');
|
|
c1 c2
|
|
1 - 01 2 - 01
|
|
1 - 02 2 - 02
|
|
1 - 03 2 - 03
|
|
explain extended
|
|
select * from t1
|
|
where (a1, a2) in (select b1, b2 from t2
|
|
where b2 in (select c2 from t3 t3a where c1 = a1) or
|
|
b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
|
|
(a1, a2) in (select c1, c2 from t3 t3c
|
|
where (c1, c2) in (select b1, b2 from t2i where b2 > '0' or b2 = a2));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
5 DEPENDENT SUBQUERY t3c ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
6 DEPENDENT SUBQUERY t2i index_subquery it2i1,it2i2,it2i3 it2i3 18 func,func 2 100.00 Using index; Using where
|
|
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
|
|
4 SUBQUERY t3b ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
3 DEPENDENT SUBQUERY t3a ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
Warnings:
|
|
Note 1276 Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1
|
|
Note 1276 Field or reference 'test.t1.a2' of SELECT #6 was resolved in SELECT #1
|
|
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(select 1 from `test`.`t3` `t3a` where ((`test`.`t3a`.`c1` = `test`.`t1`.`a1`) and (<cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where (`test`.`t3b`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where (<expr_cache><`test`.`t3c`.`c2`,`test`.`t3c`.`c1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t3c`.`c1`,`test`.`t3c`.`c2`),<exists>(<index_lookup>(<cache>(`test`.`t3c`.`c1`) in t2i on it2i3 where (((`test`.`t2i`.`b2` > '0') or (`test`.`t2i`.`b2` = `test`.`t1`.`a2`)) and (<cache>(`test`.`t3c`.`c1`) = `test`.`t2i`.`b1`) and (<cache>(`test`.`t3c`.`c2`) = `test`.`t2i`.`b2`)))))) and (<cache>(`test`.`t1`.`a1`) = `test`.`t3c`.`c1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t3c`.`c2`))))))
|
|
explain extended
|
|
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select '1 - 01','2 - 01' having ((<cache>(`test`.`t1`.`a1`) = '1 - 01') and (<cache>(`test`.`t1`.`a2`) = '2 - 01')))))
|
|
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01');
|
|
a1 a2
|
|
1 - 01 2 - 01
|
|
explain extended
|
|
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select '1 - 01','2 - 01' having ((<cache>(`test`.`t1`.`a1`) = '1 - 01') and (<cache>(`test`.`t1`.`a2`) = '2 - 01')))))
|
|
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual);
|
|
a1 a2
|
|
1 - 01 2 - 01
|
|
/******************************************************************************
|
|
* Subqueries in other uncovered clauses.
|
|
******************************************************************************/
|
|
/* SELECT clause */
|
|
select ((a1,a2) IN (select * from t2 where b2 > '0')) IS NULL from t1;
|
|
((a1,a2) IN (select * from t2 where b2 > '0')) IS NULL
|
|
0
|
|
0
|
|
0
|
|
/* GROUP BY clause */
|
|
create table columns (col int key);
|
|
insert into columns values (1), (2);
|
|
explain extended
|
|
select * from t1 group by (select col from columns limit 1);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00
|
|
2 SUBQUERY columns index NULL PRIMARY 4 NULL 2 100.00 Using index
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` group by (select `test`.`columns`.`col` from `test`.`columns` limit 1)
|
|
select * from t1 group by (select col from columns limit 1);
|
|
a1 a2
|
|
1 - 00 2 - 00
|
|
explain extended
|
|
select * from t1 group by (a1 in (select col from columns));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using temporary; Using filesort
|
|
2 DEPENDENT SUBQUERY columns unique_subquery PRIMARY PRIMARY 4 func 1 100.00 Using index; Using where; Full scan on NULL key
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` group by <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a1`) in columns on PRIMARY where trigcond((<cache>(`test`.`t1`.`a1`) = `test`.`columns`.`col`))))))
|
|
select * from t1 group by (a1 in (select col from columns));
|
|
a1 a2
|
|
1 - 00 2 - 00
|
|
/* ORDER BY clause */
|
|
explain extended
|
|
select * from t1 order by (select col from columns limit 1);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00
|
|
2 SUBQUERY columns index NULL PRIMARY 4 NULL 2 100.00 Using index
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` order by (select `test`.`columns`.`col` from `test`.`columns` limit 1)
|
|
select * from t1 order by (select col from columns limit 1);
|
|
a1 a2
|
|
1 - 00 2 - 00
|
|
1 - 01 2 - 01
|
|
1 - 02 2 - 02
|
|
/******************************************************************************
|
|
* Column types/sizes that affect materialization.
|
|
******************************************************************************/
|
|
/*
|
|
Test that BLOBs are not materialized (except when arguments of some functions).
|
|
*/
|
|
# force materialization to be always considered
|
|
set @prefix_len = 6;
|
|
set @blob_len = 16;
|
|
set @suffix_len = @blob_len - @prefix_len;
|
|
create table t1_16 (a1 blob(16), a2 blob(16));
|
|
create table t2_16 (b1 blob(16), b2 blob(16));
|
|
create table t3_16 (c1 blob(16), c2 blob(16));
|
|
insert into t1_16 values
|
|
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
|
|
insert into t1_16 values
|
|
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
|
|
insert into t1_16 values
|
|
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
|
|
insert into t2_16 values
|
|
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
|
|
insert into t2_16 values
|
|
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
|
|
insert into t2_16 values
|
|
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
|
|
insert into t3_16 values
|
|
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
|
|
insert into t3_16 values
|
|
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
|
|
insert into t3_16 values
|
|
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
|
|
insert into t3_16 values
|
|
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_16
|
|
where a1 in (select b1 from t2_16 where b1 > '0');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,<exists>(select 1 from `test`.`t2_16` where ((`test`.`t2_16`.`b1` > '0') and (<cache>(`test`.`t1_16`.`a1`) = `test`.`t2_16`.`b1`)))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_16
|
|
where a1 in (select b1 from t2_16 where b1 > '0');
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_16
|
|
where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a2`,`test`.`t1_16`.`a1`>(<in_optimizer>((`test`.`t1_16`.`a1`,`test`.`t1_16`.`a2`),<exists>(select `test`.`t2_16`.`b1`,`test`.`t2_16`.`b2` from `test`.`t2_16` where ((`test`.`t2_16`.`b1` > '0') and (<cache>(`test`.`t1_16`.`a1`) = `test`.`t2_16`.`b1`) and (<cache>(`test`.`t1_16`.`a2`) = `test`.`t2_16`.`b2`)))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_16
|
|
where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0');
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_16
|
|
where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,`test`.`t1_16`.`a1` in ( <materialize> (select substr(`test`.`t2_16`.`b1`,1,16) from `test`.`t2_16` where (`test`.`t2_16`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1_16`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_16`.`a1` = `<subquery2>`.`substring(b1,1,16)`))))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_16
|
|
where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0');
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_16
|
|
where a1 in (select group_concat(b1) from t2_16 group by b2);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using filesort
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,<exists>(select group_concat(`test`.`t2_16`.`b1` separator ',') from `test`.`t2_16` group by `test`.`t2_16`.`b2` having (<cache>(`test`.`t1_16`.`a1`) = <ref_null_helper>(group_concat(`test`.`t2_16`.`b1` separator ','))))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_16
|
|
where a1 in (select group_concat(b1) from t2_16 group by b2);
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
set @@group_concat_max_len = 256;
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_16
|
|
where a1 in (select group_concat(b1) from t2_16 group by b2);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using filesort
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,`test`.`t1_16`.`a1` in ( <materialize> (select group_concat(`test`.`t2_16`.`b1` separator ',') from `test`.`t2_16` group by `test`.`t2_16`.`b2` ), <primary_index_lookup>(`test`.`t1_16`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_16`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_16
|
|
where a1 in (select group_concat(b1) from t2_16 group by b2);
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
explain extended
|
|
select * from t1
|
|
where concat(a1,'x') IN
|
|
(select left(a1,8) from t1_16
|
|
where (a1, a2) IN
|
|
(select t2_16.b1, t2_16.b2 from t2_16, t2
|
|
where t2.b2 = substring(t2_16.b2,1,6) and
|
|
t2.b1 IN (select c1 from t3 where c2 > '0')));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
3 DEPENDENT SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)
|
|
4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><concat(`test`.`t1`.`a1`,'x')>(<in_optimizer>(concat(`test`.`t1`.`a1`,'x'),<exists>(select 1 from `test`.`t1_16` where (<expr_cache><`test`.`t1_16`.`a2`,`test`.`t1_16`.`a1`>(<in_optimizer>((`test`.`t1_16`.`a1`,`test`.`t1_16`.`a2`),<exists>(select `test`.`t2_16`.`b1`,`test`.`t2_16`.`b2` from `test`.`t2_16` join `test`.`t2` where ((`test`.`t2`.`b2` = substr(`test`.`t2_16`.`b2`,1,6)) and <expr_cache><`test`.`t2`.`b1`>(<in_optimizer>(`test`.`t2`.`b1`,`test`.`t2`.`b1` in ( <materialize> (select `test`.`t3`.`c1` from `test`.`t3` where (`test`.`t3`.`c2` > '0') ), <primary_index_lookup>(`test`.`t2`.`b1` in <temporary table> on distinct_key where ((`test`.`t2`.`b1` = `<subquery4>`.`c1`)))))) and (<cache>(`test`.`t1_16`.`a1`) = `test`.`t2_16`.`b1`) and (<cache>(`test`.`t1_16`.`a2`) = `test`.`t2_16`.`b2`))))) and (<cache>(concat(`test`.`t1`.`a1`,'x')) = left(`test`.`t1_16`.`a1`,8))))))
|
|
drop table t1_16, t2_16, t3_16;
|
|
set @blob_len = 512;
|
|
set @suffix_len = @blob_len - @prefix_len;
|
|
create table t1_512 (a1 blob(512), a2 blob(512));
|
|
create table t2_512 (b1 blob(512), b2 blob(512));
|
|
create table t3_512 (c1 blob(512), c2 blob(512));
|
|
insert into t1_512 values
|
|
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
|
|
insert into t1_512 values
|
|
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
|
|
insert into t1_512 values
|
|
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
|
|
insert into t2_512 values
|
|
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
|
|
insert into t2_512 values
|
|
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
|
|
insert into t2_512 values
|
|
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
|
|
insert into t3_512 values
|
|
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
|
|
insert into t3_512 values
|
|
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
|
|
insert into t3_512 values
|
|
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
|
|
insert into t3_512 values
|
|
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_512
|
|
where a1 in (select b1 from t2_512 where b1 > '0');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,<exists>(select 1 from `test`.`t2_512` where ((`test`.`t2_512`.`b1` > '0') and (<cache>(`test`.`t1_512`.`a1`) = `test`.`t2_512`.`b1`)))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_512
|
|
where a1 in (select b1 from t2_512 where b1 > '0');
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_512
|
|
where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a2`,`test`.`t1_512`.`a1`>(<in_optimizer>((`test`.`t1_512`.`a1`,`test`.`t1_512`.`a2`),<exists>(select `test`.`t2_512`.`b1`,`test`.`t2_512`.`b2` from `test`.`t2_512` where ((`test`.`t2_512`.`b1` > '0') and (<cache>(`test`.`t1_512`.`a1`) = `test`.`t2_512`.`b1`) and (<cache>(`test`.`t1_512`.`a2`) = `test`.`t2_512`.`b2`)))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_512
|
|
where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0');
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_512
|
|
where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select substr(`test`.`t2_512`.`b1`,1,512) from `test`.`t2_512` where (`test`.`t2_512`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `<subquery2>`.`substring(b1,1,512)`))))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_512
|
|
where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0');
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_512
|
|
where a1 in (select group_concat(b1) from t2_512 group by b2);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using filesort
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2` ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_512
|
|
where a1 in (select group_concat(b1) from t2_512 group by b2);
|
|
left(a1,7) left(a2,7)
|
|
set @@group_concat_max_len = 256;
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_512
|
|
where a1 in (select group_concat(b1) from t2_512 group by b2);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using filesort
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2` ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_512
|
|
where a1 in (select group_concat(b1) from t2_512 group by b2);
|
|
left(a1,7) left(a2,7)
|
|
drop table t1_512, t2_512, t3_512;
|
|
set @blob_len = 1024;
|
|
set @suffix_len = @blob_len - @prefix_len;
|
|
create table t1_1024 (a1 blob(1024), a2 blob(1024));
|
|
create table t2_1024 (b1 blob(1024), b2 blob(1024));
|
|
create table t3_1024 (c1 blob(1024), c2 blob(1024));
|
|
insert into t1_1024 values
|
|
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
|
|
insert into t1_1024 values
|
|
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
|
|
insert into t1_1024 values
|
|
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
|
|
insert into t2_1024 values
|
|
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
|
|
insert into t2_1024 values
|
|
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
|
|
insert into t2_1024 values
|
|
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
|
|
insert into t3_1024 values
|
|
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
|
|
insert into t3_1024 values
|
|
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
|
|
insert into t3_1024 values
|
|
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
|
|
insert into t3_1024 values
|
|
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_1024
|
|
where a1 in (select b1 from t2_1024 where b1 > '0');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,<exists>(select 1 from `test`.`t2_1024` where ((`test`.`t2_1024`.`b1` > '0') and (<cache>(`test`.`t1_1024`.`a1`) = `test`.`t2_1024`.`b1`)))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_1024
|
|
where a1 in (select b1 from t2_1024 where b1 > '0');
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_1024
|
|
where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <expr_cache><`test`.`t1_1024`.`a2`,`test`.`t1_1024`.`a1`>(<in_optimizer>((`test`.`t1_1024`.`a1`,`test`.`t1_1024`.`a2`),<exists>(select `test`.`t2_1024`.`b1`,`test`.`t2_1024`.`b2` from `test`.`t2_1024` where ((`test`.`t2_1024`.`b1` > '0') and (<cache>(`test`.`t1_1024`.`a1`) = `test`.`t2_1024`.`b1`) and (<cache>(`test`.`t1_1024`.`a2`) = `test`.`t2_1024`.`b2`)))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_1024
|
|
where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0');
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_1024
|
|
where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,`test`.`t1_1024`.`a1` in (select 1 from `test`.`t2_1024` where ((`test`.`t2_1024`.`b1` > '0') and (<cache>(`test`.`t1_1024`.`a1`) = substr(`test`.`t2_1024`.`b1`,1,1024))))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_1024
|
|
where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0');
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_1024
|
|
where a1 in (select group_concat(b1) from t2_1024 group by b2);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using filesort
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,`test`.`t1_1024`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2` ), <primary_index_lookup>(`test`.`t1_1024`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1024`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_1024
|
|
where a1 in (select group_concat(b1) from t2_1024 group by b2);
|
|
left(a1,7) left(a2,7)
|
|
set @@group_concat_max_len = 256;
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_1024
|
|
where a1 in (select group_concat(b1) from t2_1024 group by b2);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using filesort
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,`test`.`t1_1024`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2` ), <primary_index_lookup>(`test`.`t1_1024`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1024`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_1024
|
|
where a1 in (select group_concat(b1) from t2_1024 group by b2);
|
|
left(a1,7) left(a2,7)
|
|
drop table t1_1024, t2_1024, t3_1024;
|
|
set @blob_len = 1025;
|
|
set @suffix_len = @blob_len - @prefix_len;
|
|
create table t1_1025 (a1 blob(1025), a2 blob(1025));
|
|
create table t2_1025 (b1 blob(1025), b2 blob(1025));
|
|
create table t3_1025 (c1 blob(1025), c2 blob(1025));
|
|
insert into t1_1025 values
|
|
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
|
|
insert into t1_1025 values
|
|
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
|
|
insert into t1_1025 values
|
|
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
|
|
insert into t2_1025 values
|
|
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
|
|
insert into t2_1025 values
|
|
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
|
|
insert into t2_1025 values
|
|
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
|
|
insert into t3_1025 values
|
|
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
|
|
insert into t3_1025 values
|
|
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
|
|
insert into t3_1025 values
|
|
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
|
|
insert into t3_1025 values
|
|
(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_1025
|
|
where a1 in (select b1 from t2_1025 where b1 > '0');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,<exists>(select 1 from `test`.`t2_1025` where ((`test`.`t2_1025`.`b1` > '0') and (<cache>(`test`.`t1_1025`.`a1`) = `test`.`t2_1025`.`b1`)))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_1025
|
|
where a1 in (select b1 from t2_1025 where b1 > '0');
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_1025
|
|
where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <expr_cache><`test`.`t1_1025`.`a2`,`test`.`t1_1025`.`a1`>(<in_optimizer>((`test`.`t1_1025`.`a1`,`test`.`t1_1025`.`a2`),<exists>(select `test`.`t2_1025`.`b1`,`test`.`t2_1025`.`b2` from `test`.`t2_1025` where ((`test`.`t2_1025`.`b1` > '0') and (<cache>(`test`.`t1_1025`.`a1`) = `test`.`t2_1025`.`b1`) and (<cache>(`test`.`t1_1025`.`a2`) = `test`.`t2_1025`.`b2`)))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_1025
|
|
where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0');
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_1025
|
|
where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0');
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,`test`.`t1_1025`.`a1` in (select 1 from `test`.`t2_1025` where ((`test`.`t2_1025`.`b1` > '0') and (<cache>(`test`.`t1_1025`.`a1`) = substr(`test`.`t2_1025`.`b1`,1,1025))))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_1025
|
|
where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0');
|
|
left(a1,7) left(a2,7)
|
|
1 - 01x 2 - 01x
|
|
1 - 02x 2 - 02x
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_1025
|
|
where a1 in (select group_concat(b1) from t2_1025 group by b2);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using filesort
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,`test`.`t1_1025`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2` ), <primary_index_lookup>(`test`.`t1_1025`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1025`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_1025
|
|
where a1 in (select group_concat(b1) from t2_1025 group by b2);
|
|
left(a1,7) left(a2,7)
|
|
set @@group_concat_max_len = 256;
|
|
explain extended select left(a1,7), left(a2,7)
|
|
from t1_1025
|
|
where a1 in (select group_concat(b1) from t2_1025 group by b2);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using filesort
|
|
Warnings:
|
|
Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,`test`.`t1_1025`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2` ), <primary_index_lookup>(`test`.`t1_1025`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1025`.`a1` = `<subquery2>`.`group_concat(b1)`))))))
|
|
select left(a1,7), left(a2,7)
|
|
from t1_1025
|
|
where a1 in (select group_concat(b1) from t2_1025 group by b2);
|
|
left(a1,7) left(a2,7)
|
|
drop table t1_1025, t2_1025, t3_1025;
|
|
create table t1bit (a1 bit(3), a2 bit(3));
|
|
create table t2bit (b1 bit(3), b2 bit(3));
|
|
insert into t1bit values (b'000', b'100');
|
|
insert into t1bit values (b'001', b'101');
|
|
insert into t1bit values (b'010', b'110');
|
|
insert into t2bit values (b'001', b'101');
|
|
insert into t2bit values (b'010', b'110');
|
|
insert into t2bit values (b'110', b'111');
|
|
explain extended select bin(a1), bin(a2)
|
|
from t1bit
|
|
where (a1, a2) in (select b1, b2 from t2bit);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1bit ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 SUBQUERY t2bit ALL NULL NULL NULL NULL 3 100.00
|
|
Warnings:
|
|
Note 1003 select conv(`test`.`t1bit`.`a1`,10,2) AS `bin(a1)`,conv(`test`.`t1bit`.`a2`,10,2) AS `bin(a2)` from `test`.`t1bit` where <expr_cache><`test`.`t1bit`.`a2`,`test`.`t1bit`.`a1`>(<in_optimizer>((`test`.`t1bit`.`a1`,`test`.`t1bit`.`a2`),(`test`.`t1bit`.`a1`,`test`.`t1bit`.`a2`) in ( <materialize> (select `test`.`t2bit`.`b1`,`test`.`t2bit`.`b2` from `test`.`t2bit` ), <primary_index_lookup>(`test`.`t1bit`.`a1` in <temporary table> on distinct_key where ((`test`.`t1bit`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1bit`.`a2` = `<subquery2>`.`b2`))))))
|
|
select bin(a1), bin(a2)
|
|
from t1bit
|
|
where (a1, a2) in (select b1, b2 from t2bit);
|
|
bin(a1) bin(a2)
|
|
1 101
|
|
10 110
|
|
drop table t1bit, t2bit;
|
|
create table t1bb (a1 bit(3), a2 blob(3));
|
|
create table t2bb (b1 bit(3), b2 blob(3));
|
|
insert into t1bb values (b'000', '100');
|
|
insert into t1bb values (b'001', '101');
|
|
insert into t1bb values (b'010', '110');
|
|
insert into t2bb values (b'001', '101');
|
|
insert into t2bb values (b'010', '110');
|
|
insert into t2bb values (b'110', '111');
|
|
explain extended select bin(a1), a2
|
|
from t1bb
|
|
where (a1, a2) in (select b1, b2 from t2bb);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1bb ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t2bb ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select conv(`test`.`t1bb`.`a1`,10,2) AS `bin(a1)`,`test`.`t1bb`.`a2` AS `a2` from `test`.`t1bb` where <expr_cache><`test`.`t1bb`.`a2`,`test`.`t1bb`.`a1`>(<in_optimizer>((`test`.`t1bb`.`a1`,`test`.`t1bb`.`a2`),<exists>(select `test`.`t2bb`.`b1`,`test`.`t2bb`.`b2` from `test`.`t2bb` where ((<cache>(`test`.`t1bb`.`a1`) = `test`.`t2bb`.`b1`) and (<cache>(`test`.`t1bb`.`a2`) = `test`.`t2bb`.`b2`)))))
|
|
select bin(a1), a2
|
|
from t1bb
|
|
where (a1, a2) in (select b1, b2 from t2bb);
|
|
bin(a1) a2
|
|
1 101
|
|
10 110
|
|
drop table t1bb, t2bb;
|
|
drop table t1, t2, t3, t1i, t2i, t3i, columns;
|
|
/******************************************************************************
|
|
* Test the cache of the left operand of IN.
|
|
******************************************************************************/
|
|
# Test that default values of Cached_item are not used for comparison
|
|
create table t1 (s1 int);
|
|
create table t2 (s2 int);
|
|
insert into t1 values (5),(1),(0);
|
|
insert into t2 values (0), (1);
|
|
select s2 from t2 where s2 in (select s1 from t1);
|
|
s2
|
|
0
|
|
1
|
|
drop table t1, t2;
|
|
create table t1 (a int not null, b int not null);
|
|
create table t2 (c int not null, d int not null);
|
|
create table t3 (e int not null);
|
|
insert into t1 values (1,10);
|
|
insert into t1 values (1,20);
|
|
insert into t1 values (2,10);
|
|
insert into t1 values (2,20);
|
|
insert into t1 values (2,30);
|
|
insert into t1 values (3,20);
|
|
insert into t1 values (4,40);
|
|
insert into t2 values (2,10);
|
|
insert into t2 values (2,20);
|
|
insert into t2 values (2,40);
|
|
insert into t2 values (3,20);
|
|
insert into t2 values (4,10);
|
|
insert into t2 values (5,10);
|
|
insert into t3 values (10);
|
|
insert into t3 values (10);
|
|
insert into t3 values (20);
|
|
insert into t3 values (30);
|
|
explain extended
|
|
select a from t1 where a in (select c from t2 where d >= 20);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where
|
|
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`))))))
|
|
select a from t1 where a in (select c from t2 where d >= 20);
|
|
a
|
|
2
|
|
2
|
|
2
|
|
3
|
|
create index it1a on t1(a);
|
|
explain extended
|
|
select a from t1 where a in (select c from t2 where d >= 20);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using where; Using index
|
|
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`))))))
|
|
select a from t1 where a in (select c from t2 where d >= 20);
|
|
a
|
|
2
|
|
2
|
|
2
|
|
3
|
|
insert into t2 values (1,10);
|
|
explain extended
|
|
select a from t1 where a in (select c from t2 where d >= 20);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using where; Using index
|
|
2 SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`))))))
|
|
select a from t1 where a in (select c from t2 where d >= 20);
|
|
a
|
|
2
|
|
2
|
|
2
|
|
3
|
|
explain extended
|
|
select a from t1 group by a having a in (select c from t2 where d >= 20);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using index
|
|
2 SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`))))))
|
|
select a from t1 group by a having a in (select c from t2 where d >= 20);
|
|
a
|
|
2
|
|
3
|
|
create index iab on t1(a, b);
|
|
explain extended
|
|
select a from t1 group by a having a in (select c from t2 where d >= 20);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using index
|
|
2 SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`))))))
|
|
select a from t1 group by a having a in (select c from t2 where d >= 20);
|
|
a
|
|
2
|
|
3
|
|
explain extended
|
|
select a from t1 group by a
|
|
having a in (select c from t2 where d >= some(select e from t3 where max(b)=e));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 index NULL iab 8 NULL 7 100.00 Using index
|
|
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where
|
|
3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
Warnings:
|
|
Note 1276 Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1
|
|
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`,max(`test`.`t1`.`b`)>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` where (<nop>(<expr_cache><`test`.`t2`.`d`,max(`test`.`t1`.`b`)>(<in_optimizer>(`test`.`t2`.`d`,<exists>(select `test`.`t3`.`e` from `test`.`t3` where (max(`test`.`t1`.`b`) = `test`.`t3`.`e`) having (<cache>(`test`.`t2`.`d`) >= <ref_null_helper>(`test`.`t3`.`e`)))))) and (<cache>(`test`.`t1`.`a`) = `test`.`t2`.`c`)))))
|
|
select a from t1 group by a
|
|
having a in (select c from t2 where d >= some(select e from t3 where max(b)=e));
|
|
a
|
|
2
|
|
3
|
|
explain extended
|
|
select a from t1
|
|
where a in (select c from t2 where d >= some(select e from t3 where b=e));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 index NULL iab 8 NULL 7 100.00 Using where; Using index
|
|
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where
|
|
3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
Warnings:
|
|
Note 1276 Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1
|
|
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` where (<nop>(<expr_cache><`test`.`t2`.`d`,`test`.`t1`.`b`>(<in_optimizer>(`test`.`t2`.`d`,<exists>(select 1 from `test`.`t3` where ((`test`.`t1`.`b` = `test`.`t3`.`e`) and (<cache>(`test`.`t2`.`d`) >= `test`.`t3`.`e`)))))) and (<cache>(`test`.`t1`.`a`) = `test`.`t2`.`c`)))))
|
|
select a from t1
|
|
where a in (select c from t2 where d >= some(select e from t3 where b=e));
|
|
a
|
|
1
|
|
2
|
|
2
|
|
2
|
|
3
|
|
drop table t1, t2, t3;
|
|
create table t2 (a int, b int, key(a), key(b));
|
|
insert into t2 values (3,3),(3,3),(3,3);
|
|
select 1 from t2 where
|
|
t2.a > 1
|
|
or
|
|
t2.a = 3 and not t2.a not in (select t2.b from t2);
|
|
1
|
|
1
|
|
1
|
|
1
|
|
drop table t2;
|
|
create table t1 (a1 int key);
|
|
create table t2 (b1 int);
|
|
insert into t1 values (5);
|
|
explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
|
2 SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found
|
|
select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
|
|
min(a1)
|
|
set @save_optimizer_switch=@@optimizer_switch;
|
|
set @@optimizer_switch='default,materialization=off';
|
|
explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
|
2 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found
|
|
select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
|
|
min(a1)
|
|
set @@optimizer_switch='default,semijoin=off';
|
|
explain select min(a1) from t1 where 7 in (select b1 from t2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
|
2 SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found
|
|
select min(a1) from t1 where 7 in (select b1 from t2);
|
|
min(a1)
|
|
set @@optimizer_switch='default,materialization=off';
|
|
# with MariaDB and MWL#90, this particular case is solved:
|
|
explain select min(a1) from t1 where 7 in (select b1 from t2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
|
|
select min(a1) from t1 where 7 in (select b1 from t2);
|
|
min(a1)
|
|
NULL
|
|
# but when we go around MWL#90 code, the problem still shows up:
|
|
explain select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
|
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
|
|
select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4;
|
|
min(a1)
|
|
set @@optimizer_switch= @save_optimizer_switch;
|
|
drop table t1,t2;
|
|
create table t1 (a char(2), b varchar(10));
|
|
insert into t1 values ('a', 'aaa');
|
|
insert into t1 values ('aa', 'aaaa');
|
|
explain select a,b from t1 where b in (select a from t1);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
|
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2
|
|
select a,b from t1 where b in (select a from t1);
|
|
a b
|
|
prepare st1 from "select a,b from t1 where b in (select a from t1)";
|
|
execute st1;
|
|
a b
|
|
execute st1;
|
|
a b
|
|
drop table t1;
|
|
CREATE TABLE t1 (f1 INT, f2 DECIMAL(5,3)) ENGINE=MyISAM;
|
|
INSERT INTO t1 (f1, f2) VALUES (1, 1.789);
|
|
INSERT INTO t1 (f1, f2) VALUES (13, 1.454);
|
|
INSERT INTO t1 (f1, f2) VALUES (10, 1.668);
|
|
CREATE TABLE t2 LIKE t1;
|
|
INSERT INTO t2 VALUES (1, 1.789);
|
|
INSERT INTO t2 VALUES (13, 1.454);
|
|
set @save_optimizer_switch=@@optimizer_switch;
|
|
SET @@optimizer_switch='default,semijoin=on,materialization=on';
|
|
EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
|
2 SUBQUERY t2 ALL NULL NULL NULL NULL 2
|
|
SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
|
|
COUNT(*)
|
|
2
|
|
set @@optimizer_switch= @save_optimizer_switch;
|
|
DROP TABLE t1, t2;
|
|
CREATE TABLE t1 (
|
|
pk int,
|
|
a varchar(1),
|
|
b varchar(4),
|
|
c varchar(4),
|
|
d varchar(4),
|
|
PRIMARY KEY (pk)
|
|
);
|
|
INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff');
|
|
CREATE TABLE t2 LIKE t1;
|
|
INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff');
|
|
set @save_optimizer_switch=@@optimizer_switch;
|
|
SET @@optimizer_switch='default,semijoin=on,materialization=on';
|
|
EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
|
|
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
|
|
2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 Using index condition; Using MRR
|
|
SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
|
|
pk
|
|
2
|
|
SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0);
|
|
pk
|
|
2
|
|
DROP TABLE t1, t2;
|
|
set optimizer_switch=@save_optimizer_switch;
|
|
#
|
|
# BUG#50019: Wrong result for IN-subquery with materialization
|
|
#
|
|
create table t1(i int);
|
|
insert into t1 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
|
|
create table t2(i int);
|
|
insert into t2 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
|
|
create table t3(i int);
|
|
insert into t3 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
|
|
select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5);
|
|
i
|
|
1
|
|
2
|
|
3
|
|
4
|
|
set @save_optimizer_switch=@@optimizer_switch;
|
|
set session optimizer_switch='materialization=off';
|
|
select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5);
|
|
i
|
|
1
|
|
2
|
|
3
|
|
4
|
|
set session optimizer_switch=@save_optimizer_switch;
|
|
drop table t1, t2, t3;
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2);
|
|
create table t1 (a int);
|
|
insert into t1 values (0),(1),(2);
|
|
explain select a, a in (select a from t1) from t0;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t0 ALL NULL NULL NULL NULL 3
|
|
2 SUBQUERY t1 ALL NULL NULL NULL NULL 3
|
|
select a, a in (select a from t1) from t0;
|
|
a a in (select a from t1)
|
|
0 1
|
|
1 1
|
|
2 1
|
|
prepare s from 'select a, a in (select a from t1) from t0';
|
|
execute s;
|
|
a a in (select a from t1)
|
|
0 1
|
|
1 1
|
|
2 1
|
|
update t1 set a=123;
|
|
execute s;
|
|
a a in (select a from t1)
|
|
0 0
|
|
1 0
|
|
2 0
|
|
drop table t0, t1;
|
|
set optimizer_switch='firstmatch=on';
|
|
set @@optimizer_switch=default;
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2);
|
|
create table t1 (a int);
|
|
insert into t1 values (0),(1),(2);
|
|
explain select a, a in (select a from t1) from t0;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t0 ALL NULL NULL NULL NULL 3
|
|
2 SUBQUERY t1 ALL NULL NULL NULL NULL 3
|
|
select a, a in (select a from t1) from t0;
|
|
a a in (select a from t1)
|
|
0 1
|
|
1 1
|
|
2 1
|
|
prepare s from 'select a, a in (select a from t1) from t0';
|
|
execute s;
|
|
a a in (select a from t1)
|
|
0 1
|
|
1 1
|
|
2 1
|
|
update t1 set a=123;
|
|
execute s;
|
|
a a in (select a from t1)
|
|
0 0
|
|
1 0
|
|
2 0
|
|
drop table t0, t1;
|
|
#
|
|
# LPBUG#609121: RQG: wrong result on aggregate + NOT IN + HAVING and
|
|
# partial_match_table_scan=on
|
|
#
|
|
create table t1 (c1 int);
|
|
create table t2 (c2 int);
|
|
insert into t1 values (1);
|
|
insert into t2 values (2);
|
|
set @@optimizer_switch='semijoin=off';
|
|
EXPLAIN
|
|
SELECT SUM(c1) c1_sum FROM t1 WHERE c1 IN (SELECT c2 FROM t2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
|
2 SUBQUERY t2 system NULL NULL NULL NULL 1
|
|
SELECT SUM(c1) c1_sum FROM t1 WHERE c1 IN (SELECT c2 FROM t2);
|
|
c1_sum
|
|
NULL
|
|
EXPLAIN
|
|
SELECT SUM(c1) c1_sum FROM t1 WHERE c1 IN (SELECT c2 FROM t2) HAVING c1_sum;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
|
2 SUBQUERY t2 system NULL NULL NULL NULL 1
|
|
SELECT SUM(c1) c1_sum FROM t1 WHERE c1 IN (SELECT c2 FROM t2) HAVING c1_sum;
|
|
c1_sum
|
|
drop table t1, t2;
|
|
#
|
|
# BUG#52344 - Subquery materialization:
|
|
# Assertion if subquery in on-clause of outer join
|
|
#
|
|
set @@optimizer_switch='semijoin=off';
|
|
CREATE TABLE t1 (i INTEGER);
|
|
INSERT INTO t1 VALUES (10);
|
|
CREATE TABLE t2 (j INTEGER);
|
|
INSERT INTO t2 VALUES (5);
|
|
CREATE TABLE t3 (k INTEGER);
|
|
EXPLAIN
|
|
SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT k FROM t3);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
|
1 PRIMARY t2 system NULL NULL NULL NULL 1
|
|
2 SUBQUERY t3 system NULL NULL NULL NULL 0 const row not found
|
|
SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT k FROM t3);
|
|
i
|
|
10
|
|
EXPLAIN
|
|
SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT max(k) FROM t3);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
|
1 PRIMARY t2 system NULL NULL NULL NULL 1
|
|
2 SUBQUERY t3 system NULL NULL NULL NULL 0 const row not found
|
|
SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT max(k) FROM t3);
|
|
i
|
|
10
|
|
DROP TABLE t1, t2, t3;
|
|
#
|
|
# LPBUG#609121: RQG: wrong result on aggregate + NOT IN + HAVING and
|
|
# partial_match_table_scan=on
|
|
#
|
|
CREATE TABLE t1 (c1 int);
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
CREATE TABLE t2 (c2 int);
|
|
INSERT INTO t2 VALUES (10);
|
|
PREPARE st1 FROM "
|
|
SELECT *
|
|
FROM t2 LEFT JOIN (SELECT * FROM t2) t3 ON (8, 4) IN (SELECT c1, c1 FROM t1)";
|
|
EXECUTE st1;
|
|
c2 c2
|
|
10 10
|
|
EXECUTE st1;
|
|
c2 c2
|
|
10 10
|
|
DROP TABLE t1, t2;
|
|
#
|
|
# Testcase backport: BUG#46548 IN-subqueries return 0 rows with materialization=on
|
|
#
|
|
CREATE TABLE t1 (
|
|
pk int,
|
|
a varchar(1),
|
|
b varchar(4),
|
|
c varchar(4),
|
|
d varchar(4),
|
|
PRIMARY KEY (pk)
|
|
);
|
|
INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff');
|
|
CREATE TABLE t2 LIKE t1;
|
|
INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff');
|
|
SET @@optimizer_switch='default,semijoin=on,materialization=on';
|
|
EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
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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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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
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2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 Using index condition; Using MRR
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SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
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pk
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2
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SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0);
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pk
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2
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DROP TABLE t1, t2;
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#
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# BUG#724228: Wrong result with materialization=on and three aggregates in maria-5.3-mwl90
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#
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CREATE TABLE t1 ( f2 int(11)) ;
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INSERT IGNORE INTO t1 VALUES ('7'),('9'),('7'),('4'),('2'),('6'),('8'),('5'),('6'),('188'),('2'),('1'),('1'),('0'),('9'),('4');
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CREATE TABLE t2 ( f1 int(11), f2 int(11)) ENGINE=MyISAM;
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INSERT IGNORE INTO t2 VALUES ('1','1');
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CREATE TABLE t3 ( f1 int(11), f2 int(11), f3 int(11), PRIMARY KEY (f1)) ;
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INSERT IGNORE INTO t3 VALUES ('16','6','1'),('18','3','4'),('19',NULL,'9'),('20','0','6'),('41','2','0'),('42','2','5'),('43','9','6'),('44','7','4'),('45','1','4'),('46','222','238'),('47','3','6'),('48','6','6'),('49',NULL,'1'),('50','5','1');
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SET @_save_join_cache_level = @@join_cache_level;
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SET @_save_optimizer_switch = @@optimizer_switch;
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SET join_cache_level = 1;
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SET optimizer_switch='materialization=on';
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SELECT f1 FROM t3
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WHERE
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f1 NOT IN (SELECT MAX(f2) FROM t1) AND
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f3 IN (SELECT MIN(f1) FROM t2) AND
|
|
f1 IN (SELECT COUNT(f2) FROM t1);
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|
f1
|
|
16
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SET @@join_cache_level = @_save_join_cache_level;
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SET @@optimizer_switch = @_save_optimizer_switch;
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drop table t1, t2, t3;
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