| Current Path : /compat/linux/proc/self/root/home/usr.opt/mysql57/mysql-test/r/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //compat/linux/proc/self/root/home/usr.opt/mysql57/mysql-test/r/group_min_max.result |
drop table if exists t1;
create table t1 (
a1 char(64), a2 char(64), b char(16), c char(16) not null, d char(16), dummy char(248) default ' '
);
insert into t1 (a1, a2, b, c, d) values
('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4'),
('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4');
create index idx_t1_0 on t1 (a1);
create index idx_t1_1 on t1 (a1,a2,b,c);
create index idx_t1_2 on t1 (a1,a2,b);
analyze table t1;
Table Op Msg_type Msg_text
test.t1 analyze status Table is already up to date
drop table if exists t2;
create table t2 (
a1 char(64), a2 char(64) not null, b char(16), c char(16), d char(16), dummy char(248) default ' '
);
insert into t2 select * from t1;
insert into t2 (a1, a2, b, c, d) values
('a','a',NULL,'a777','xyz'),('a','a',NULL,'a888','xyz'),('a','a',NULL,'a999','xyz'),
('a','a','a',NULL,'xyz'),
('a','a','b',NULL,'xyz'),
('a','b','a',NULL,'xyz'),
('c','a',NULL,'c777','xyz'),('c','a',NULL,'c888','xyz'),('c','a',NULL,'c999','xyz'),
('d','b','b',NULL,'xyz'),
('e','a','a',NULL,'xyz'),('e','a','a',NULL,'xyz'),('e','a','a',NULL,'xyz'),('e','a','a',NULL,'xyz'),
('e','a','b',NULL,'xyz'),('e','a','b',NULL,'xyz'),('e','a','b',NULL,'xyz'),('e','a','b',NULL,'xyz'),
('a','a',NULL,'a777','xyz'),('a','a',NULL,'a888','xyz'),('a','a',NULL,'a999','xyz'),
('a','a','a',NULL,'xyz'),
('a','a','b',NULL,'xyz'),
('a','b','a',NULL,'xyz'),
('c','a',NULL,'c777','xyz'),('c','a',NULL,'c888','xyz'),('c','a',NULL,'c999','xyz'),
('d','b','b',NULL,'xyz'),
('e','a','a',NULL,'xyz'),('e','a','a',NULL,'xyz'),('e','a','a',NULL,'xyz'),('e','a','a',NULL,'xyz'),
('e','a','b',NULL,'xyz'),('e','a','b',NULL,'xyz'),('e','a','b',NULL,'xyz'),('e','a','b',NULL,'xyz');
create index idx_t2_0 on t2 (a1);
create index idx_t2_1 on t2 (a1,a2,b,c);
create index idx_t2_2 on t2 (a1,a2,b);
analyze table t2;
Table Op Msg_type Msg_text
test.t2 analyze status Table is already up to date
drop table if exists t3;
create table t3 (
a1 char(1), a2 char(1), b char(1), c char(4) not null, d char(3), dummy char(1) default ' '
);
insert into t3 (a1, a2, b, c, d) values
('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4');
insert into t3 (a1, a2, b, c, d) values
('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4');
insert into t3 (a1, a2, b, c, d) values
('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4');
insert into t3 (a1, a2, b, c, d) values
('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4');
create index idx_t3_0 on t3 (a1);
create index idx_t3_1 on t3 (a1,a2,b,c);
create index idx_t3_2 on t3 (a1,a2,b);
analyze table t3;
Table Op Msg_type Msg_text
test.t3 analyze status Table is already up to date
explain select a1, min(a2) from t1 group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 130 NULL 5 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,min(`test`.`t1`.`a2`) AS `min(a2)` from `test`.`t1` group by `test`.`t1`.`a1`
explain select a1, max(a2) from t1 group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 65 NULL 5 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,max(`test`.`t1`.`a2`) AS `max(a2)` from `test`.`t1` group by `test`.`t1`.`a1`
explain select a1, min(a2), max(a2) from t1 group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 130 NULL 5 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,min(`test`.`t1`.`a2`) AS `min(a2)`,max(`test`.`t1`.`a2`) AS `max(a2)` from `test`.`t1` group by `test`.`t1`.`a1`
explain select a1, a2, b, min(c), max(c) from t1 group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,max(c),min(c) from t1 group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,max(`test`.`t1`.`c`) AS `max(c)`,min(`test`.`t1`.`c`) AS `min(c)` from `test`.`t1` group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,max(c),min(c) from t2 group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 # NULL # 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)`,min(`test`.`t2`.`c`) AS `min(c)` from `test`.`t2` group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select min(a2), a1, max(a2), min(a2), a1 from t1 group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 130 NULL 5 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select min(`test`.`t1`.`a2`) AS `min(a2)`,`test`.`t1`.`a1` AS `a1`,max(`test`.`t1`.`a2`) AS `max(a2)`,min(`test`.`t1`.`a2`) AS `min(a2)`,`test`.`t1`.`a1` AS `a1` from `test`.`t1` group by `test`.`t1`.`a1`
explain select a1, b, min(c), a1, max(c), b, a2, max(c), max(c) from t1 group by a1, a2, b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,`test`.`t1`.`a1` AS `a1`,max(`test`.`t1`.`c`) AS `max(c)`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`a2` AS `a2`,max(`test`.`t1`.`c`) AS `max(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select min(a2) from t1 group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 130 NULL 5 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select min(`test`.`t1`.`a2`) AS `min(a2)` from `test`.`t1` group by `test`.`t1`.`a1`
explain select a2, min(c), max(c) from t1 group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a2` AS `a2`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
select a1, min(a2) from t1 group by a1;
a1 min(a2)
a a
b a
c a
d a
select a1, max(a2) from t1 group by a1;
a1 max(a2)
a b
b b
c b
d b
select a1, min(a2), max(a2) from t1 group by a1;
a1 min(a2) max(a2)
a a b
b a b
c a b
d a b
select a1, a2, b, min(c), max(c) from t1 group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a a111 d111
a a b e112 h112
a b a i121 l121
a b b m122 p122
b a a a211 d211
b a b e212 h212
b b a i221 l221
b b b m222 p222
c a a a311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
d a a a411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b,max(c),min(c) from t1 group by a1,a2,b;
a1 a2 b max(c) min(c)
a a a d111 a111
a a b h112 e112
a b a l121 i121
a b b p122 m122
b a a d211 a211
b a b h212 e212
b b a l221 i221
b b b p222 m222
c a a d311 a311
c a b h312 e312
c b a l321 i321
c b b p322 m322
d a a d411 a411
d a b h412 e412
d b a l421 i421
d b b p422 m422
select a1,a2,b,max(c),min(c) from t2 group by a1,a2,b;
a1 a2 b max(c) min(c)
a a NULL a999 a777
a a a d111 a111
a a b h112 e112
a b a l121 i121
a b b p122 m122
b a a d211 a211
b a b h212 e212
b b a l221 i221
b b b p222 m222
c a NULL c999 c777
c a a d311 a311
c a b h312 e312
c b a l321 i321
c b b p322 m322
d a a d411 a411
d a b h412 e412
d b a l421 i421
d b b p422 m422
e a a NULL NULL
e a b NULL NULL
select min(a2), a1, max(a2), min(a2), a1 from t1 group by a1;
min(a2) a1 max(a2) min(a2) a1
a a b a a
a b b a b
a c b a c
a d b a d
select a1, b, min(c), a1, max(c), b, a2, max(c), max(c) from t1 group by a1, a2, b;
a1 b min(c) a1 max(c) b a2 max(c) max(c)
a a a111 a d111 a a d111 d111
a b e112 a h112 b a h112 h112
a a i121 a l121 a b l121 l121
a b m122 a p122 b b p122 p122
b a a211 b d211 a a d211 d211
b b e212 b h212 b a h212 h212
b a i221 b l221 a b l221 l221
b b m222 b p222 b b p222 p222
c a a311 c d311 a a d311 d311
c b e312 c h312 b a h312 h312
c a i321 c l321 a b l321 l321
c b m322 c p322 b b p322 p322
d a a411 d d411 a a d411 d411
d b e412 d h412 b a h412 h412
d a i421 d l421 a b l421 l421
d b m422 d p422 b b p422 p422
select min(a2) from t1 group by a1;
min(a2)
a
a
a
a
select a2, min(c), max(c) from t1 group by a1,a2,b;
a2 min(c) max(c)
a a111 d111
a e112 h112
b i121 l121
b m122 p122
a a211 d211
a e212 h212
b i221 l221
b m222 p222
a a311 d311
a e312 h312
b i321 l321
b m322 p322
a a411 d411
a e412 h412
b i421 l421
b m422 p422
explain select a1,a2,b,min(c),max(c) from t1 where a1 < 'd' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`a1` < 'd') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where a1 >= 'b' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 14 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`a1` >= 'b') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b, max(c) from t1 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 14 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where ((`test`.`t1`.`a1` >= 'c') or (`test`.`t1`.`a1` < 'b')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1, max(c) from t1 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 14 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where ((`test`.`t1`.`a1` >= 'c') or (`test`.`t1`.`a1` < 'b')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where a1 >= 'c' or a2 < 'b' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where ((`test`.`t1`.`a1` >= 'c') or (`test`.`t1`.`a2` < 'b')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b, max(c) from t1 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where ((`test`.`t1`.`a1` = 'z') or (`test`.`t1`.`a1` = 'b') or (`test`.`t1`.`a1` = 'd')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where ((`test`.`t1`.`a1` = 'z') or (`test`.`t1`.`a1` = 'b') or (`test`.`t1`.`a1` = 'd')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b, max(c) from t1 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (((`test`.`t1`.`a1` = 'b') or (`test`.`t1`.`a1` = 'd') or (`test`.`t1`.`a1` = 'a') or (`test`.`t1`.`a1` = 'c')) and (`test`.`t1`.`a2` > 'a')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (((`test`.`t1`.`a1` = 'b') or (`test`.`t1`.`a1` = 'd') or (`test`.`t1`.`a1` = 'a') or (`test`.`t1`.`a1` = 'c')) and (`test`.`t1`.`a2` > 'a')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,min(c),max(c) from t1 where a1 >= 'b' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 14 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`a1` >= 'b') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1, max(c) from t1 where a1 in ('a','b','d') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 14 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`a1` in ('a','b','d')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b, max(c) from t2 where a1 < 'd' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`a1` < 'd') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where a1 < 'd' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`a1` < 'd') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where a1 >= 'b' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`a1` >= 'b') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b, max(c) from t2 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`a1` >= 'c') or (`test`.`t2`.`a1` < 'b')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1, max(c) from t2 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`a1` >= 'c') or (`test`.`t2`.`a1` < 'b')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where a1 >= 'c' or a2 < 'b' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`a1` >= 'c') or (`test`.`t2`.`a2` < 'b')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b, max(c) from t2 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`a1` = 'z') or (`test`.`t2`.`a1` = 'b') or (`test`.`t2`.`a1` = 'd')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`a1` = 'z') or (`test`.`t2`.`a1` = 'b') or (`test`.`t2`.`a1` = 'd')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b, max(c) from t2 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (((`test`.`t2`.`a1` = 'b') or (`test`.`t2`.`a1` = 'd') or (`test`.`t2`.`a1` = 'a') or (`test`.`t2`.`a1` = 'c')) and (`test`.`t2`.`a2` > 'a')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (((`test`.`t2`.`a1` = 'b') or (`test`.`t2`.`a1` = 'd') or (`test`.`t2`.`a1` = 'a') or (`test`.`t2`.`a1` = 'c')) and (`test`.`t2`.`a2` > 'a')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,min(c),max(c) from t2 where a1 >= 'b' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`a1` >= 'b') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1, max(c) from t2 where a1 in ('a','b','d') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`a1` in ('a','b','d')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
select a1,a2,b,min(c),max(c) from t1 where a1 < 'd' group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a a111 d111
a a b e112 h112
a b a i121 l121
a b b m122 p122
b a a a211 d211
b a b e212 h212
b b a i221 l221
b b b m222 p222
c a a a311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
select a1,a2,b,min(c),max(c) from t1 where a1 >= 'b' group by a1,a2,b;
a1 a2 b min(c) max(c)
b a a a211 d211
b a b e212 h212
b b a i221 l221
b b b m222 p222
c a a a311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
d a a a411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b, max(c) from t1 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
a1 a2 b max(c)
a a a d111
a a b h112
a b a l121
a b b p122
c a a d311
c a b h312
c b a l321
c b b p322
d a a d411
d a b h412
d b a l421
d b b p422
select a1, max(c) from t1 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
a1 max(c)
a d111
a h112
a l121
a p122
c d311
c h312
c l321
c p322
d d411
d h412
d l421
d p422
select a1,a2,b,min(c),max(c) from t1 where a1 >= 'c' or a2 < 'b' group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a a111 d111
a a b e112 h112
b a a a211 d211
b a b e212 h212
c a a a311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
d a a a411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b, max(c) from t1 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
a1 a2 b max(c)
b a a d211
b a b h212
b b a l221
b b b p222
d a a d411
d a b h412
d b a l421
d b b p422
select a1,a2,b,min(c),max(c) from t1 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
a1 a2 b min(c) max(c)
b a a a211 d211
b a b e212 h212
b b a i221 l221
b b b m222 p222
d a a a411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b, max(c) from t1 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
a1 a2 b max(c)
a b a l121
a b b p122
b b a l221
b b b p222
c b a l321
c b b p322
d b a l421
d b b p422
select a1,a2,b,min(c),max(c) from t1 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
a1 a2 b min(c) max(c)
a b a i121 l121
a b b m122 p122
b b a i221 l221
b b b m222 p222
c b a i321 l321
c b b m322 p322
d b a i421 l421
d b b m422 p422
select a1,min(c),max(c) from t1 where a1 >= 'b' group by a1,a2,b;
a1 min(c) max(c)
b a211 d211
b e212 h212
b i221 l221
b m222 p222
c a311 d311
c e312 h312
c i321 l321
c m322 p322
d a411 d411
d e412 h412
d i421 l421
d m422 p422
select a1, max(c) from t1 where a1 in ('a','b','d') group by a1,a2,b;
a1 max(c)
a d111
a h112
a l121
a p122
b d211
b h212
b l221
b p222
d d411
d h412
d l421
d p422
select a1,a2,b, max(c) from t2 where a1 < 'd' group by a1,a2,b;
a1 a2 b max(c)
a a NULL a999
a a a d111
a a b h112
a b a l121
a b b p122
b a a d211
b a b h212
b b a l221
b b b p222
c a NULL c999
c a a d311
c a b h312
c b a l321
c b b p322
select a1,a2,b,min(c),max(c) from t2 where a1 < 'd' group by a1,a2,b;
a1 a2 b min(c) max(c)
a a NULL a777 a999
a a a a111 d111
a a b e112 h112
a b a i121 l121
a b b m122 p122
b a a a211 d211
b a b e212 h212
b b a i221 l221
b b b m222 p222
c a NULL c777 c999
c a a a311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
select a1,a2,b,min(c),max(c) from t2 where a1 >= 'b' group by a1,a2,b;
a1 a2 b min(c) max(c)
b a a a211 d211
b a b e212 h212
b b a i221 l221
b b b m222 p222
c a NULL c777 c999
c a a a311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
d a a a411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
e a a NULL NULL
e a b NULL NULL
select a1,a2,b, max(c) from t2 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
a1 a2 b max(c)
a a NULL a999
a a a d111
a a b h112
a b a l121
a b b p122
c a NULL c999
c a a d311
c a b h312
c b a l321
c b b p322
d a a d411
d a b h412
d b a l421
d b b p422
e a a NULL
e a b NULL
select a1, max(c) from t2 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
a1 max(c)
a a999
a d111
a h112
a l121
a p122
c c999
c d311
c h312
c l321
c p322
d d411
d h412
d l421
d p422
e NULL
e NULL
select a1,a2,b,min(c),max(c) from t2 where a1 >= 'c' or a2 < 'b' group by a1,a2,b;
a1 a2 b min(c) max(c)
a a NULL a777 a999
a a a a111 d111
a a b e112 h112
b a a a211 d211
b a b e212 h212
c a NULL c777 c999
c a a a311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
d a a a411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
e a a NULL NULL
e a b NULL NULL
select a1,a2,b, max(c) from t2 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
a1 a2 b max(c)
b a a d211
b a b h212
b b a l221
b b b p222
d a a d411
d a b h412
d b a l421
d b b p422
select a1,a2,b,min(c),max(c) from t2 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
a1 a2 b min(c) max(c)
b a a a211 d211
b a b e212 h212
b b a i221 l221
b b b m222 p222
d a a a411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b, max(c) from t2 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
a1 a2 b max(c)
a b a l121
a b b p122
b b a l221
b b b p222
c b a l321
c b b p322
d b a l421
d b b p422
select a1,a2,b,min(c),max(c) from t2 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
a1 a2 b min(c) max(c)
a b a i121 l121
a b b m122 p122
b b a i221 l221
b b b m222 p222
c b a i321 l321
c b b m322 p322
d b a i421 l421
d b b m422 p422
select a1,min(c),max(c) from t2 where a1 >= 'b' group by a1,a2,b;
a1 min(c) max(c)
b a211 d211
b e212 h212
b i221 l221
b m222 p222
c c777 c999
c a311 d311
c e312 h312
c i321 l321
c m322 p322
d a411 d411
d e412 h412
d i421 l421
d m422 p422
e NULL NULL
e NULL NULL
select a1, max(c) from t2 where a1 in ('a','b','d') group by a1,a2,b;
a1 max(c)
a a999
a d111
a h112
a l121
a p122
b d211
b h212
b l221
b p222
d d411
d h412
d l421
d p422
explain select a1,a2,b,max(c),min(c) from t1 where (a2 = 'a') and (b = 'b') group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 5 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,max(`test`.`t1`.`c`) AS `max(c)`,min(`test`.`t1`.`c`) AS `min(c)` from `test`.`t1` where ((`test`.`t1`.`b` = 'b') and (`test`.`t1`.`a2` = 'a')) group by `test`.`t1`.`a1`
explain select a1,max(c),min(c) from t1 where (a2 = 'a') and (b = 'b') group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 5 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,max(`test`.`t1`.`c`) AS `max(c)`,min(`test`.`t1`.`c`) AS `min(c)` from `test`.`t1` where ((`test`.`t1`.`b` = 'b') and (`test`.`t1`.`a2` = 'a')) group by `test`.`t1`.`a1`
explain select a1,a2,b, max(c) from t1 where (b = 'b') group by a1,a2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 9 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`b` = 'b') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select a1,a2,b,min(c),max(c) from t1 where (b = 'b') group by a1,a2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 9 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`b` = 'b') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select a1,a2, max(c) from t1 where (b = 'b') group by a1,a2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 9 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`b` = 'b') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b') group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL 5 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)`,min(`test`.`t2`.`c`) AS `min(c)` from `test`.`t2` where ((`test`.`t2`.`b` = 'b') and (`test`.`t2`.`a2` = 'a')) group by `test`.`t2`.`a1`
explain select a1,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b') group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL 5 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,max(`test`.`t2`.`c`) AS `max(c)`,min(`test`.`t2`.`c`) AS `min(c)` from `test`.`t2` where ((`test`.`t2`.`b` = 'b') and (`test`.`t2`.`a2` = 'a')) group by `test`.`t2`.`a1`
explain select a1,a2,b, max(c) from t2 where (b = 'b') group by a1,a2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 146 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`b` = 'b') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select a1,a2,b,min(c),max(c) from t2 where (b = 'b') group by a1,a2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`b` = 'b') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select a1,a2, max(c) from t2 where (b = 'b') group by a1,a2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 146 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`b` = 'b') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select a1,a2,b,max(c),min(c) from t3 where (a2 = 'a') and (b = 'b') group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t3 NULL range idx_t3_0,idx_t3_1,idx_t3_2 idx_t3_1 6 NULL 4 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t3`.`a1` AS `a1`,`test`.`t3`.`a2` AS `a2`,`test`.`t3`.`b` AS `b`,max(`test`.`t3`.`c`) AS `max(c)`,min(`test`.`t3`.`c`) AS `min(c)` from `test`.`t3` where ((`test`.`t3`.`b` = 'b') and (`test`.`t3`.`a2` = 'a')) group by `test`.`t3`.`a1`
explain select a1,max(c),min(c) from t3 where (a2 = 'a') and (b = 'b') group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t3 NULL range idx_t3_0,idx_t3_1,idx_t3_2 idx_t3_1 6 NULL 4 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t3`.`a1` AS `a1`,max(`test`.`t3`.`c`) AS `max(c)`,min(`test`.`t3`.`c`) AS `min(c)` from `test`.`t3` where ((`test`.`t3`.`b` = 'b') and (`test`.`t3`.`a2` = 'a')) group by `test`.`t3`.`a1`
select a1,a2,b,max(c),min(c) from t1 where (a2 = 'a') and (b = 'b') group by a1;
a1 a2 b max(c) min(c)
a a b h112 e112
b a b h212 e212
c a b h312 e312
d a b h412 e412
select a1,max(c),min(c) from t1 where (a2 = 'a') and (b = 'b') group by a1;
a1 max(c) min(c)
a h112 e112
b h212 e212
c h312 e312
d h412 e412
select a1,a2,b, max(c) from t1 where (b = 'b') group by a1,a2;
a1 a2 b max(c)
a a b h112
a b b p122
b a b h212
b b b p222
c a b h312
c b b p322
d a b h412
d b b p422
select a1,a2,b,min(c),max(c) from t1 where (b = 'b') group by a1,a2;
a1 a2 b min(c) max(c)
a a b e112 h112
a b b m122 p122
b a b e212 h212
b b b m222 p222
c a b e312 h312
c b b m322 p322
d a b e412 h412
d b b m422 p422
select a1,a2, max(c) from t1 where (b = 'b') group by a1,a2;
a1 a2 max(c)
a a h112
a b p122
b a h212
b b p222
c a h312
c b p322
d a h412
d b p422
select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b') group by a1;
a1 a2 b max(c) min(c)
a a b h112 e112
b a b h212 e212
c a b h312 e312
d a b h412 e412
e a b NULL NULL
select a1,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b') group by a1;
a1 max(c) min(c)
a h112 e112
b h212 e212
c h312 e312
d h412 e412
e NULL NULL
select a1,a2,b, max(c) from t2 where (b = 'b') group by a1,a2;
a1 a2 b max(c)
a a b h112
a b b p122
b a b h212
b b b p222
c a b h312
c b b p322
d a b h412
d b b p422
e a b NULL
select a1,a2,b,min(c),max(c) from t2 where (b = 'b') group by a1,a2;
a1 a2 b min(c) max(c)
a a b e112 h112
a b b m122 p122
b a b e212 h212
b b b m222 p222
c a b e312 h312
c b b m322 p322
d a b e412 h412
d b b m422 p422
e a b NULL NULL
select a1,a2, max(c) from t2 where (b = 'b') group by a1,a2;
a1 a2 max(c)
a a h112
a b p122
b a h212
b b p222
c a h312
c b p322
d a h412
d b p422
e a NULL
select a1,a2,b,max(c),min(c) from t3 where (a2 = 'a') and (b = 'b') group by a1;
a1 a2 b max(c) min(c)
a a b h112 e112
b a b h212 e212
c a b h312 e312
select a1,max(c),min(c) from t3 where (a2 = 'a') and (b = 'b') group by a1;
a1 max(c) min(c)
a h112 e112
b h212 e212
c h312 e312
explain select a1,a2,b,min(c) from t2 where (a2 = 'a') and b is NULL group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL 5 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)` from `test`.`t2` where ((`test`.`t2`.`a2` = 'a') and isnull(`test`.`t2`.`b`)) group by `test`.`t2`.`a1`
explain select a1,a2,b,max(c) from t2 where (a2 = 'a') and b is NULL group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 146 NULL 5 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`a2` = 'a') and isnull(`test`.`t2`.`b`)) group by `test`.`t2`.`a1`
explain select a1,a2,b,min(c) from t2 where b is NULL group by a1,a2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)` from `test`.`t2` where isnull(`test`.`t2`.`b`) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select a1,a2,b,max(c) from t2 where b is NULL group by a1,a2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 146 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where isnull(`test`.`t2`.`b`) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select a1,a2,b,min(c),max(c) from t2 where b is NULL group by a1,a2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where isnull(`test`.`t2`.`b`) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select a1,a2,b,min(c),max(c) from t2 where b is NULL group by a1,a2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where isnull(`test`.`t2`.`b`) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
select a1,a2,b,min(c) from t2 where (a2 = 'a') and b is NULL group by a1;
a1 a2 b min(c)
a a NULL a777
c a NULL c777
select a1,a2,b,max(c) from t2 where (a2 = 'a') and b is NULL group by a1;
a1 a2 b max(c)
a a NULL a999
c a NULL c999
select a1,a2,b,min(c) from t2 where b is NULL group by a1,a2;
a1 a2 b min(c)
a a NULL a777
c a NULL c777
select a1,a2,b,max(c) from t2 where b is NULL group by a1,a2;
a1 a2 b max(c)
a a NULL a999
c a NULL c999
select a1,a2,b,min(c),max(c) from t2 where b is NULL group by a1,a2;
a1 a2 b min(c) max(c)
a a NULL a777 a999
c a NULL c777 c999
select a1,a2,b,min(c),max(c) from t2 where b is NULL group by a1,a2;
a1 a2 b min(c) max(c)
a a NULL a777 a999
c a NULL c777 c999
explain select a1,a2,b, max(c) from t1 where (c > 'b1') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL # 33.33 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`c` > 'b1') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where (c > 'b1') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`c` > 'b1') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b, max(c) from t1 where (c > 'f123') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 33.33 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`c` > 'f123') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where (c > 'f123') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`c` > 'f123') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b, max(c) from t1 where (c < 'a0') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`c` < 'a0') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where (c < 'a0') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`c` < 'a0') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b, max(c) from t1 where (c < 'k321') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`c` < 'k321') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where (c < 'k321') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`c` < 'k321') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b, max(c) from t1 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where ((`test`.`t1`.`c` < 'a0') or (`test`.`t1`.`c` > 'b1')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where ((`test`.`t1`.`c` < 'a0') or (`test`.`t1`.`c` > 'b1')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b, max(c) from t1 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 55.55 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where ((`test`.`t1`.`c` > 'b1') or (`test`.`t1`.`c` <= 'g1')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 55.55 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where ((`test`.`t1`.`c` > 'b1') or (`test`.`t1`.`c` <= 'g1')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where (c > 'b111') and (c <= 'g112') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where ((`test`.`t1`.`c` > 'b111') and (`test`.`t1`.`c` <= 'g112')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where (c < 'c5') or (c = 'g412') or (c = 'k421') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where ((`test`.`t1`.`c` < 'c5') or (`test`.`t1`.`c` = 'g412') or (`test`.`t1`.`c` = 'k421')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where ((c > 'b111') and (c <= 'g112')) or ((c > 'd000') and (c <= 'i110')) group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (((`test`.`t1`.`c` > 'b111') and (`test`.`t1`.`c` <= 'g112')) or ((`test`.`t1`.`c` > 'd000') and (`test`.`t1`.`c` <= 'i110'))) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where (c between 'b111' and 'g112') or (c between 'd000' and 'i110') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where ((`test`.`t1`.`c` between 'b111' and 'g112') or (`test`.`t1`.`c` between 'd000' and 'i110')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b, max(c) from t2 where (c > 'b1') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 33.33 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`c` > 'b1') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where (c > 'b1') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`c` > 'b1') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b, max(c) from t2 where (c > 'f123') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 33.33 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`c` > 'f123') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where (c > 'f123') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`c` > 'f123') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b, max(c) from t2 where (c < 'a0') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`c` < 'a0') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where (c < 'a0') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`c` < 'a0') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b, max(c) from t2 where (c < 'k321') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`c` < 'k321') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where (c < 'k321') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (`test`.`t2`.`c` < 'k321') group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b, max(c) from t2 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`c` < 'a0') or (`test`.`t2`.`c` > 'b1')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`c` < 'a0') or (`test`.`t2`.`c` > 'b1')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b, max(c) from t2 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 55.55 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`c` > 'b1') or (`test`.`t2`.`c` <= 'g1')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`c` > 'b1') or (`test`.`t2`.`c` <= 'g1')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where (c > 'b111') and (c <= 'g112') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`c` > 'b111') and (`test`.`t2`.`c` <= 'g112')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where (c < 'c5') or (c = 'g412') or (c = 'k421') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`c` < 'c5') or (`test`.`t2`.`c` = 'g412') or (`test`.`t2`.`c` = 'k421')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where ((c > 'b111') and (c <= 'g112')) or ((c > 'd000') and (c <= 'i110')) group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (((`test`.`t2`.`c` > 'b111') and (`test`.`t2`.`c` <= 'g112')) or ((`test`.`t2`.`c` > 'd000') and (`test`.`t2`.`c` <= 'i110'))) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
select a1,a2,b, max(c) from t1 where (c > 'b1') group by a1,a2,b;
a1 a2 b max(c)
a a a d111
a a b h112
a b a l121
a b b p122
b a a d211
b a b h212
b b a l221
b b b p222
c a a d311
c a b h312
c b a l321
c b b p322
d a a d411
d a b h412
d b a l421
d b b p422
select a1,a2,b,min(c),max(c) from t1 where (c > 'b1') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a b111 d111
a a b e112 h112
a b a i121 l121
a b b m122 p122
b a a b211 d211
b a b e212 h212
b b a i221 l221
b b b m222 p222
c a a b311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
d a a b411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b, max(c) from t1 where (c > 'f123') group by a1,a2,b;
a1 a2 b max(c)
a a b h112
a b a l121
a b b p122
b a b h212
b b a l221
b b b p222
c a b h312
c b a l321
c b b p322
d a b h412
d b a l421
d b b p422
select a1,a2,b,min(c),max(c) from t1 where (c > 'f123') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a b g112 h112
a b a i121 l121
a b b m122 p122
b a b f212 h212
b b a i221 l221
b b b m222 p222
c a b f312 h312
c b a i321 l321
c b b m322 p322
d a b f412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b, max(c) from t1 where (c < 'a0') group by a1,a2,b;
a1 a2 b max(c)
select a1,a2,b,min(c),max(c) from t1 where (c < 'a0') group by a1,a2,b;
a1 a2 b min(c) max(c)
select a1,a2,b, max(c) from t1 where (c < 'k321') group by a1,a2,b;
a1 a2 b max(c)
a a a d111
a a b h112
a b a k121
b a a d211
b a b h212
b b a k221
c a a d311
c a b h312
c b a j321
d a a d411
d a b h412
d b a j421
select a1,a2,b,min(c),max(c) from t1 where (c < 'k321') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a a111 d111
a a b e112 h112
a b a i121 k121
b a a a211 d211
b a b e212 h212
b b a i221 k221
c a a a311 d311
c a b e312 h312
c b a i321 j321
d a a a411 d411
d a b e412 h412
d b a i421 j421
select a1,a2,b, max(c) from t1 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
a1 a2 b max(c)
a a a d111
a a b h112
a b a l121
a b b p122
b a a d211
b a b h212
b b a l221
b b b p222
c a a d311
c a b h312
c b a l321
c b b p322
d a a d411
d a b h412
d b a l421
d b b p422
select a1,a2,b,min(c),max(c) from t1 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a b111 d111
a a b e112 h112
a b a i121 l121
a b b m122 p122
b a a b211 d211
b a b e212 h212
b b a i221 l221
b b b m222 p222
c a a b311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
d a a b411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b, max(c) from t1 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
a1 a2 b max(c)
a a a d111
a a b h112
a b a l121
a b b p122
b a a d211
b a b h212
b b a l221
b b b p222
c a a d311
c a b h312
c b a l321
c b b p322
d a a d411
d a b h412
d b a l421
d b b p422
select a1,a2,b,min(c),max(c) from t1 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a a111 d111
a a b e112 h112
a b a i121 l121
a b b m122 p122
b a a a211 d211
b a b e212 h212
b b a i221 l221
b b b m222 p222
c a a a311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
d a a a411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b,min(c),max(c) from t1 where (c > 'b111') and (c <= 'g112') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a c111 d111
a a b e112 g112
b a a b211 d211
b a b e212 f212
c a a b311 d311
c a b e312 f312
d a a b411 d411
d a b e412 f412
select a1,a2,b,min(c),max(c) from t1 where (c < 'c5') or (c = 'g412') or (c = 'k421') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a a111 c111
b a a a211 c211
c a a a311 c311
d a a a411 c411
d a b g412 g412
d b a k421 k421
select a1,a2,b,min(c),max(c) from t1 where ((c > 'b111') and (c <= 'g112')) or ((c > 'd000') and (c <= 'i110')) group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a c111 d111
a a b e112 h112
b a a b211 d211
b a b e212 h212
c a a b311 d311
c a b e312 h312
d a a b411 d411
d a b e412 h412
select a1,a2,b,min(c),max(c) from t1 where (c between 'b111' and 'g112') or (c between 'd000' and 'i110') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a b111 d111
a a b e112 h112
b a a b211 d211
b a b e212 h212
c a a b311 d311
c a b e312 h312
d a a b411 d411
d a b e412 h412
select a1,a2,b, max(c) from t2 where (c > 'b1') group by a1,a2,b;
a1 a2 b max(c)
a a a d111
a a b h112
a b a l121
a b b p122
b a a d211
b a b h212
b b a l221
b b b p222
c a NULL c999
c a a d311
c a b h312
c b a l321
c b b p322
d a a d411
d a b h412
d b a l421
d b b p422
select a1,a2,b,min(c),max(c) from t2 where (c > 'b1') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a b111 d111
a a b e112 h112
a b a i121 l121
a b b m122 p122
b a a b211 d211
b a b e212 h212
b b a i221 l221
b b b m222 p222
c a NULL c777 c999
c a a b311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
d a a b411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b, max(c) from t2 where (c > 'f123') group by a1,a2,b;
a1 a2 b max(c)
a a b h112
a b a l121
a b b p122
b a b h212
b b a l221
b b b p222
c a b h312
c b a l321
c b b p322
d a b h412
d b a l421
d b b p422
select a1,a2,b,min(c),max(c) from t2 where (c > 'f123') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a b g112 h112
a b a i121 l121
a b b m122 p122
b a b f212 h212
b b a i221 l221
b b b m222 p222
c a b f312 h312
c b a i321 l321
c b b m322 p322
d a b f412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b, max(c) from t2 where (c < 'a0') group by a1,a2,b;
a1 a2 b max(c)
select a1,a2,b,min(c),max(c) from t2 where (c < 'a0') group by a1,a2,b;
a1 a2 b min(c) max(c)
select a1,a2,b, max(c) from t2 where (c < 'k321') group by a1,a2,b;
a1 a2 b max(c)
a a NULL a999
a a a d111
a a b h112
a b a k121
b a a d211
b a b h212
b b a k221
c a NULL c999
c a a d311
c a b h312
c b a j321
d a a d411
d a b h412
d b a j421
select a1,a2,b,min(c),max(c) from t2 where (c < 'k321') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a NULL a777 a999
a a a a111 d111
a a b e112 h112
a b a i121 k121
b a a a211 d211
b a b e212 h212
b b a i221 k221
c a NULL c777 c999
c a a a311 d311
c a b e312 h312
c b a i321 j321
d a a a411 d411
d a b e412 h412
d b a i421 j421
select a1,a2,b, max(c) from t2 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
a1 a2 b max(c)
a a a d111
a a b h112
a b a l121
a b b p122
b a a d211
b a b h212
b b a l221
b b b p222
c a NULL c999
c a a d311
c a b h312
c b a l321
c b b p322
d a a d411
d a b h412
d b a l421
d b b p422
select a1,a2,b,min(c),max(c) from t2 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a b111 d111
a a b e112 h112
a b a i121 l121
a b b m122 p122
b a a b211 d211
b a b e212 h212
b b a i221 l221
b b b m222 p222
c a NULL c777 c999
c a a b311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
d a a b411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b, max(c) from t2 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
a1 a2 b max(c)
a a NULL a999
a a a d111
a a b h112
a b a l121
a b b p122
b a a d211
b a b h212
b b a l221
b b b p222
c a NULL c999
c a a d311
c a b h312
c b a l321
c b b p322
d a a d411
d a b h412
d b a l421
d b b p422
select a1,a2,b,min(c),max(c) from t2 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a NULL a777 a999
a a a a111 d111
a a b e112 h112
a b a i121 l121
a b b m122 p122
b a a a211 d211
b a b e212 h212
b b a i221 l221
b b b m222 p222
c a NULL c777 c999
c a a a311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
d a a a411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b,min(c),max(c) from t2 where (c > 'b111') and (c <= 'g112') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a c111 d111
a a b e112 g112
b a a b211 d211
b a b e212 f212
c a NULL c777 c999
c a a b311 d311
c a b e312 f312
d a a b411 d411
d a b e412 f412
select a1,a2,b,min(c),max(c) from t2 where (c < 'c5') or (c = 'g412') or (c = 'k421') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a NULL a777 a999
a a a a111 c111
b a a a211 c211
c a a a311 c311
d a a a411 c411
d a b g412 g412
d b a k421 k421
select a1,a2,b,min(c),max(c) from t2 where ((c > 'b111') and (c <= 'g112')) or ((c > 'd000') and (c <= 'i110')) group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a c111 d111
a a b e112 h112
b a a b211 d211
b a b e212 h212
c a NULL c777 c999
c a a b311 d311
c a b e312 h312
d a a b411 d411
d a b e412 h412
explain select a1,a2,b,min(c),max(c) from t1
where exists ( select * from t2 where t2.c = t1.c )
group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL index idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 128 100.00 Using where; Using index
2 DEPENDENT SUBQUERY t2 NULL index NULL idx_t2_1 163 NULL 164 10.00 Using where; Using index
Warnings:
Note 1276 Field or reference 'test.t1.c' of SELECT #2 was resolved in SELECT #1
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where exists(/* select#2 */ select 1 from `test`.`t2` where (`test`.`t2`.`c` = `test`.`t1`.`c`)) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1
where exists ( select * from t2 where t2.c > 'b1' )
group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using index for group-by
2 SUBQUERY t2 NULL index NULL idx_t2_1 163 NULL 164 33.33 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where 1 group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (((`test`.`t1`.`a1` >= 'c') or (`test`.`t1`.`a2` < 'b')) and (`test`.`t1`.`b` > 'a')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where (a1 >= 'c' or a2 < 'b') and (c > 'b111') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (((`test`.`t1`.`a1` >= 'c') or (`test`.`t1`.`a2` < 'b')) and (`test`.`t1`.`c` > 'b111')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,min(c),max(c) from t1 where (a2 >= 'b') and (b = 'a') and (c > 'b111') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where ((`test`.`t1`.`b` = 'a') and (`test`.`t1`.`a2` >= 'b') and (`test`.`t1`.`c` > 'b111')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select a1,a2,b,min(c) from t1 where ((a1 > 'a') or (a1 < '9')) and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c < 'h112') or (c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122')) group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 14 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)` from `test`.`t1` where ((`test`.`t1`.`b` = 'a') and ((`test`.`t1`.`a1` > 'a') or (`test`.`t1`.`a1` < '9')) and (`test`.`t1`.`a2` >= 'b') and (`test`.`t1`.`a2` < 'z') and ((`test`.`t1`.`c` < 'h112') or (`test`.`t1`.`c` = 'j121') or ((`test`.`t1`.`c` > 'k121') and (`test`.`t1`.`c` < 'm122')) or (`test`.`t1`.`c` > 'o122'))) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select a1,a2,b,min(c) from t1 where ((a1 > 'a') or (a1 < '9')) and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122') or (c < 'h112') or (c = 'c111')) group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 14 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)` from `test`.`t1` where ((`test`.`t1`.`b` = 'a') and ((`test`.`t1`.`a1` > 'a') or (`test`.`t1`.`a1` < '9')) and (`test`.`t1`.`a2` >= 'b') and (`test`.`t1`.`a2` < 'z') and ((`test`.`t1`.`c` = 'j121') or ((`test`.`t1`.`c` > 'k121') and (`test`.`t1`.`c` < 'm122')) or (`test`.`t1`.`c` > 'o122') or (`test`.`t1`.`c` < 'h112') or (`test`.`t1`.`c` = 'c111'))) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select a1,a2,b,min(c) from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 14 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)` from `test`.`t1` where ((`test`.`t1`.`b` = 'c') and (`test`.`t1`.`a1` > 'a') and (`test`.`t1`.`a2` > 'a')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select a1,a2,b,min(c) from t1 where (ord(a1) > 97) and (ord(a2) + ord(a1) > 194) and (b = 'c') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)` from `test`.`t1` where ((`test`.`t1`.`b` = 'c') and (ord(`test`.`t1`.`a1`) > 97) and ((ord(`test`.`t1`.`a2`) + ord(`test`.`t1`.`a1`)) > 194)) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select a1,a2,b,min(c),max(c) from t2 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (((`test`.`t2`.`a1` >= 'c') or (`test`.`t2`.`a2` < 'b')) and (`test`.`t2`.`b` > 'a')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where (a1 >= 'c' or a2 < 'b') and (c > 'b111') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where (((`test`.`t2`.`a1` >= 'c') or (`test`.`t2`.`a2` < 'b')) and (`test`.`t2`.`c` > 'b111')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b,min(c),max(c) from t2 where (a2 >= 'b') and (b = 'a') and (c > 'b111') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`b` = 'a') and (`test`.`t2`.`a2` >= 'b') and (`test`.`t2`.`c` > 'b111')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select a1,a2,b,min(c) from t2 where ((a1 > 'a') or (a1 < '9')) and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c < 'h112') or (c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122')) group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)` from `test`.`t2` where ((`test`.`t2`.`b` = 'a') and ((`test`.`t2`.`a1` > 'a') or (`test`.`t2`.`a1` < '9')) and (`test`.`t2`.`a2` >= 'b') and (`test`.`t2`.`a2` < 'z') and ((`test`.`t2`.`c` < 'h112') or (`test`.`t2`.`c` = 'j121') or ((`test`.`t2`.`c` > 'k121') and (`test`.`t2`.`c` < 'm122')) or (`test`.`t2`.`c` > 'o122'))) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select a1,a2,b,min(c) from t2 where ((a1 > 'a') or (a1 < '9')) and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122') or (c < 'h112') or (c = 'c111')) group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)` from `test`.`t2` where ((`test`.`t2`.`b` = 'a') and ((`test`.`t2`.`a1` > 'a') or (`test`.`t2`.`a1` < '9')) and (`test`.`t2`.`a2` >= 'b') and (`test`.`t2`.`a2` < 'z') and ((`test`.`t2`.`c` = 'j121') or ((`test`.`t2`.`c` > 'k121') and (`test`.`t2`.`c` < 'm122')) or (`test`.`t2`.`c` > 'o122') or (`test`.`t2`.`c` < 'h112') or (`test`.`t2`.`c` = 'c111'))) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select a1,a2,b,min(c) from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)` from `test`.`t2` where ((`test`.`t2`.`b` = 'c') and (`test`.`t2`.`a1` > 'a') and (`test`.`t2`.`a2` > 'a')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
select a1,a2,b,min(c),max(c) from t1 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a b e112 h112
b a b e212 h212
c a b e312 h312
c b b m322 p322
d a b e412 h412
d b b m422 p422
select a1,a2,b,min(c),max(c) from t1 where (a1 >= 'c' or a2 < 'b') and (c > 'b111') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a c111 d111
a a b e112 h112
b a a b211 d211
b a b e212 h212
c a a b311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
d a a b411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b,min(c),max(c) from t1 where (a2 >= 'b') and (b = 'a') and (c > 'b111') group by a1,a2,b;
a1 a2 b min(c) max(c)
a b a i121 l121
b b a i221 l221
c b a i321 l321
d b a i421 l421
select a1,a2,b,min(c) from t1 where ((a1 > 'a') or (a1 < '9')) and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c < 'h112') or (c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122')) group by a1,a2,b;
a1 a2 b min(c)
b b a k221
c b a k321
d b a k421
select a1,a2,b,min(c) from t1 where ((a1 > 'a') or (a1 < '9')) and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122') or (c < 'h112') or (c = 'c111')) group by a1,a2,b;
a1 a2 b min(c)
b b a k221
c b a k321
d b a k421
select a1,a2,b,min(c) from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
a1 a2 b min(c)
select a1,a2,b,min(c) from t1 where (ord(a1) > 97) and (ord(a2) + ord(a1) > 194) and (b = 'c') group by a1,a2,b;
a1 a2 b min(c)
select a1,a2,b,min(c),max(c) from t2 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a b e112 h112
b a b e212 h212
c a b e312 h312
c b b m322 p322
d a b e412 h412
d b b m422 p422
e a b NULL NULL
select a1,a2,b,min(c),max(c) from t2 where (a1 >= 'c' or a2 < 'b') and (c > 'b111') group by a1,a2,b;
a1 a2 b min(c) max(c)
a a a c111 d111
a a b e112 h112
b a a b211 d211
b a b e212 h212
c a NULL c777 c999
c a a b311 d311
c a b e312 h312
c b a i321 l321
c b b m322 p322
d a a b411 d411
d a b e412 h412
d b a i421 l421
d b b m422 p422
select a1,a2,b,min(c),max(c) from t2 where (a2 >= 'b') and (b = 'a') and (c > 'b111') group by a1,a2,b;
a1 a2 b min(c) max(c)
a b a i121 l121
b b a i221 l221
c b a i321 l321
d b a i421 l421
select a1,a2,b,min(c) from t2 where ((a1 > 'a') or (a1 < '9')) and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c < 'h112') or (c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122')) group by a1,a2,b;
a1 a2 b min(c)
b b a k221
c b a k321
d b a k421
select a1,a2,b,min(c) from t2 where ((a1 > 'a') or (a1 < '9')) and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122') or (c < 'h112') or (c = 'c111')) group by a1,a2,b;
a1 a2 b min(c)
b b a k221
c b a k321
d b a k421
select a1,a2,b,min(c) from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
a1 a2 b min(c)
explain select a1,a2,b from t1 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (((`test`.`t1`.`a1` >= 'c') or (`test`.`t1`.`a2` < 'b')) and (`test`.`t1`.`b` > 'a')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 'a') and (`test`.`t1`.`a2` >= 'b')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((`test`.`t1`.`c` = 'i121') and (`test`.`t1`.`b` = 'a') and (`test`.`t1`.`a2` >= 'b')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 14 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 'c') and (`test`.`t1`.`a1` > 'a') and (`test`.`t1`.`a2` > 'a')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select a1,a2,b from t2 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b` from `test`.`t2` where (((`test`.`t2`.`a1` >= 'c') or (`test`.`t2`.`a2` < 'b')) and (`test`.`t2`.`b` > 'a')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1,a2,b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b` from `test`.`t2` where ((`test`.`t2`.`b` = 'a') and (`test`.`t2`.`a2` >= 'b')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 0.61 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t2` where ((`test`.`t2`.`c` = 'i121') and (`test`.`t2`.`b` = 'a') and (`test`.`t2`.`a2` >= 'b')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b` from `test`.`t2` where ((`test`.`t2`.`b` = 'c') and (`test`.`t2`.`a1` > 'a') and (`test`.`t2`.`a2` > 'a')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
select a1,a2,b from t1 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
a1 a2 b
a a b
b a b
c a b
c b b
d a b
d b b
select a1,a2,b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
a1 a2 b
a b a
b b a
c b a
d b a
select a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
a1 a2 b c
a b a i121
select a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
a1 a2 b
select a1,a2,b from t2 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
a1 a2 b
a a b
b a b
c a b
c b b
d a b
d b b
e a b
select a1,a2,b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
a1 a2 b
a b a
b b a
c b a
d b a
select a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
a1 a2 b c
a b a i121
select a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
a1 a2 b
explain select distinct a1,a2,b from t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b` from `test`.`t1`
explain select distinct a1,a2,b from t1 where (a2 >= 'b') and (b = 'a');
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 'a') and (`test`.`t1`.`a2` >= 'b'))
explain extended select distinct a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index idx_t1_1 idx_t1_1 163 NULL 128 0.78 Using where; Using index
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((`test`.`t1`.`c` = 'i121') and (`test`.`t1`.`b` = 'a') and (`test`.`t1`.`a2` >= 'b'))
explain select distinct a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 14 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 'c') and (`test`.`t1`.`a1` > 'a') and (`test`.`t1`.`a2` > 'a'))
explain select distinct b from t1 where (a2 >= 'b') and (b = 'a');
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index idx_t1_1,idx_t1_2 idx_t1_2 147 NULL 128 3.33 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 'a') and (`test`.`t1`.`a2` >= 'b'))
explain select distinct a1,a2,b from t2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b` from `test`.`t2`
explain select distinct a1,a2,b from t2 where (a2 >= 'b') and (b = 'a');
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b` from `test`.`t2` where ((`test`.`t2`.`b` = 'a') and (`test`.`t2`.`a2` >= 'b'))
explain extended select distinct a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index idx_t2_1 idx_t2_1 163 NULL 164 0.61 Using where; Using index
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select distinct `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t2` where ((`test`.`t2`.`c` = 'i121') and (`test`.`t2`.`b` = 'a') and (`test`.`t2`.`a2` >= 'b'))
explain select distinct a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b` from `test`.`t2` where ((`test`.`t2`.`b` = 'c') and (`test`.`t2`.`a1` > 'a') and (`test`.`t2`.`a2` > 'a'))
explain select distinct b from t2 where (a2 >= 'b') and (b = 'a');
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index idx_t2_1,idx_t2_2 idx_t2_2 146 NULL 164 3.33 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t2`.`b` AS `b` from `test`.`t2` where ((`test`.`t2`.`b` = 'a') and (`test`.`t2`.`a2` >= 'b'))
select distinct a1,a2,b from t1;
a1 a2 b
a a a
a a b
a b a
a b b
b a a
b a b
b b a
b b b
c a a
c a b
c b a
c b b
d a a
d a b
d b a
d b b
select distinct a1,a2,b from t1 where (a2 >= 'b') and (b = 'a');
a1 a2 b
a b a
b b a
c b a
d b a
select distinct a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
a1 a2 b c
a b a i121
select distinct a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
a1 a2 b
select distinct b from t1 where (a2 >= 'b') and (b = 'a');
b
a
select distinct a1,a2,b from t2;
a1 a2 b
a a NULL
a a a
a a b
a b a
a b b
b a a
b a b
b b a
b b b
c a NULL
c a a
c a b
c b a
c b b
d a a
d a b
d b a
d b b
e a a
e a b
select distinct a1,a2,b from t2 where (a2 >= 'b') and (b = 'a');
a1 a2 b
a b a
b b a
c b a
d b a
select distinct a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
a1 a2 b c
a b a i121
select distinct a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
a1 a2 b
select distinct b from t2 where (a2 >= 'b') and (b = 'a');
b
a
select distinct t_00.a1
from t1 t_00
where exists ( select * from t2 where a1 = t_00.a1 );
a1
a
b
c
d
select distinct a1,a1 from t1;
a1 a1
a a
b b
c c
d d
select distinct a2,a1,a2,a1 from t1;
a2 a1 a2 a1
a a a a
b a b a
a b a b
b b b b
a c a c
b c b c
a d a d
b d b d
select distinct t1.a1,t2.a1 from t1,t2;
a1 a1
a a
b a
c a
d a
a b
b b
c b
d b
a c
b c
c c
d c
a d
b d
c d
d d
a e
b e
c e
d e
explain select distinct a1,a2,b from t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b` from `test`.`t1`
explain select distinct a1,a2,b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 'a') and (`test`.`t1`.`a2` >= 'b')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select distinct a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 163 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((`test`.`t1`.`c` = 'i121') and (`test`.`t1`.`b` = 'a') and (`test`.`t1`.`a2` >= 'b')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select distinct a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 14 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 'c') and (`test`.`t1`.`a1` > 'a') and (`test`.`t1`.`a2` > 'a')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select distinct b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using where; Using index for group-by; Using temporary; Using filesort
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 'a') and (`test`.`t1`.`a2` >= 'b')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain select distinct a1,a2,b from t2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b` from `test`.`t2`
explain select distinct a1,a2,b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b` from `test`.`t2` where ((`test`.`t2`.`b` = 'a') and (`test`.`t2`.`a2` >= 'b')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select distinct a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index idx_t2_1,idx_t2_2 idx_t2_1 163 NULL # 0.61 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t2` where ((`test`.`t2`.`c` = 'i121') and (`test`.`t2`.`b` = 'a') and (`test`.`t2`.`a2` >= 'b')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select distinct a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b` from `test`.`t2` where ((`test`.`t2`.`b` = 'c') and (`test`.`t2`.`a1` > 'a') and (`test`.`t2`.`a2` > 'a')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
explain select distinct b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range idx_t2_1,idx_t2_2 idx_t2_1 146 NULL # 100.00 Using where; Using index for group-by; Using temporary; Using filesort
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t2`.`b` AS `b` from `test`.`t2` where ((`test`.`t2`.`b` = 'a') and (`test`.`t2`.`a2` >= 'b')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`
select distinct a1,a2,b from t1;
a1 a2 b
a a a
a a b
a b a
a b b
b a a
b a b
b b a
b b b
c a a
c a b
c b a
c b b
d a a
d a b
d b a
d b b
select distinct a1,a2,b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
a1 a2 b
a b a
b b a
c b a
d b a
select distinct a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
a1 a2 b c
a b a i121
select distinct a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
a1 a2 b
select distinct b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
b
a
select distinct a1,a2,b from t2;
a1 a2 b
a a NULL
a a a
a a b
a b a
a b b
b a a
b a b
b b a
b b b
c a NULL
c a a
c a b
c b a
c b b
d a a
d a b
d b a
d b b
e a a
e a b
select distinct a1,a2,b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
a1 a2 b
a b a
b b a
c b a
d b a
select distinct a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
a1 a2 b c
a b a i121
select distinct a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
a1 a2 b
select distinct b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
b
a
explain select count(distinct a1,a2,b) from t1 where (a2 >= 'b') and (b = 'a');
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`) AS `count(distinct a1,a2,b)` from `test`.`t1` where ((`test`.`t1`.`b` = 'a') and (`test`.`t1`.`a2` >= 'b'))
explain select count(distinct a1,a2,b,c) from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1 idx_t1_1 163 NULL 65 100.00 Using where; Using index for group-by (scanning)
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`,`test`.`t1`.`c`) AS `count(distinct a1,a2,b,c)` from `test`.`t1` where ((`test`.`t1`.`c` = 'i121') and (`test`.`t1`.`b` = 'a') and (`test`.`t1`.`a2` >= 'b'))
explain extended select count(distinct a1,a2,b) from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 14 100.00 Using where; Using index for group-by
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`) AS `count(distinct a1,a2,b)` from `test`.`t1` where ((`test`.`t1`.`b` = 'c') and (`test`.`t1`.`a1` > 'a') and (`test`.`t1`.`a2` > 'a'))
explain select count(distinct b) from t1 where (a2 >= 'b') and (b = 'a');
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index idx_t1_1,idx_t1_2 idx_t1_2 147 NULL 128 3.33 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`b`) AS `count(distinct b)` from `test`.`t1` where ((`test`.`t1`.`b` = 'a') and (`test`.`t1`.`a2` >= 'b'))
explain extended select 98 + count(distinct a1,a2,b) from t1 where (a1 > 'a') and (a2 > 'a');
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 14 100.00 Using where; Using index for group-by
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select (98 + count(distinct `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`)) AS `98 + count(distinct a1,a2,b)` from `test`.`t1` where ((`test`.`t1`.`a1` > 'a') and (`test`.`t1`.`a2` > 'a'))
select count(distinct a1,a2,b) from t1 where (a2 >= 'b') and (b = 'a');
count(distinct a1,a2,b)
4
select count(distinct a1,a2,b,c) from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
count(distinct a1,a2,b,c)
1
select count(distinct a1,a2,b) from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
count(distinct a1,a2,b)
0
select count(distinct b) from t1 where (a2 >= 'b') and (b = 'a');
count(distinct b)
1
select 98 + count(distinct a1,a2,b) from t1 where (a1 > 'a') and (a2 > 'a');
98 + count(distinct a1,a2,b)
104
explain select a1,a2,b, concat(min(c), max(c)) from t1 where a1 < 'd' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,concat(min(`test`.`t1`.`c`),max(`test`.`t1`.`c`)) AS `concat(min(c), max(c))` from `test`.`t1` where (`test`.`t1`.`a1` < 'd') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select concat(a1,min(c)),b from t1 where a1 < 'd' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select concat(`test`.`t1`.`a1`,min(`test`.`t1`.`c`)) AS `concat(a1,min(c))`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (`test`.`t1`.`a1` < 'd') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select concat(a1,min(c)),b,max(c) from t1 where a1 < 'd' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select concat(`test`.`t1`.`a1`,min(`test`.`t1`.`c`)) AS `concat(a1,min(c))`,`test`.`t1`.`b` AS `b`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`a1` < 'd') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select concat(a1,a2),b,min(c),max(c) from t1 where a1 < 'd' group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select concat(`test`.`t1`.`a1`,`test`.`t1`.`a2`) AS `concat(a1,a2)`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`a1` < 'd') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select concat(ord(min(b)),ord(max(b))),min(b),max(b) from t1 group by a1,a2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 9 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select concat(ord(min(`test`.`t1`.`b`)),ord(max(`test`.`t1`.`b`))) AS `concat(ord(min(b)),ord(max(b)))`,min(`test`.`t1`.`b`) AS `min(b)`,max(`test`.`t1`.`b`) AS `max(b)` from `test`.`t1` group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
select a1,a2,b, concat(min(c), max(c)) from t1 where a1 < 'd' group by a1,a2,b;
a1 a2 b concat(min(c), max(c))
a a a a111d111
a a b e112h112
a b a i121l121
a b b m122p122
b a a a211d211
b a b e212h212
b b a i221l221
b b b m222p222
c a a a311d311
c a b e312h312
c b a i321l321
c b b m322p322
select concat(a1,min(c)),b from t1 where a1 < 'd' group by a1,a2,b;
concat(a1,min(c)) b
aa111 a
ae112 b
ai121 a
am122 b
ba211 a
be212 b
bi221 a
bm222 b
ca311 a
ce312 b
ci321 a
cm322 b
select concat(a1,min(c)),b,max(c) from t1 where a1 < 'd' group by a1,a2,b;
concat(a1,min(c)) b max(c)
aa111 a d111
ae112 b h112
ai121 a l121
am122 b p122
ba211 a d211
be212 b h212
bi221 a l221
bm222 b p222
ca311 a d311
ce312 b h312
ci321 a l321
cm322 b p322
select concat(a1,a2),b,min(c),max(c) from t1 where a1 < 'd' group by a1,a2,b;
concat(a1,a2) b min(c) max(c)
aa a a111 d111
aa b e112 h112
ab a i121 l121
ab b m122 p122
ba a a211 d211
ba b e212 h212
bb a i221 l221
bb b m222 p222
ca a a311 d311
ca b e312 h312
cb a i321 l321
cb b m322 p322
select concat(ord(min(b)),ord(max(b))),min(b),max(b) from t1 group by a1,a2;
concat(ord(min(b)),ord(max(b))) min(b) max(b)
9798 a b
9798 a b
9798 a b
9798 a b
9798 a b
9798 a b
9798 a b
9798 a b
explain select a1,a2,b,d,min(c),max(c) from t1 group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL idx_t1_1,idx_t1_2 NULL NULL NULL 128 100.00 Using temporary; Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`d` AS `d`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,b,d from t1 group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL idx_t1_1,idx_t1_2 NULL NULL NULL 128 100.00 Using temporary; Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`d` AS `d` from `test`.`t1` group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain extended select a1,a2,min(b),max(b) from t1
where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') and (c > 'a111') group by a1,a2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 130 NULL 76 33.33 Using where; Using index
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,min(`test`.`t1`.`b`) AS `min(b)`,max(`test`.`t1`.`b`) AS `max(b)` from `test`.`t1` where (((`test`.`t1`.`a1` = 'b') or (`test`.`t1`.`a1` = 'd') or (`test`.`t1`.`a1` = 'a') or (`test`.`t1`.`a1` = 'c')) and (`test`.`t1`.`a2` > 'a') and (`test`.`t1`.`c` > 'a111')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
explain extended select a1,a2,b,min(c),max(c) from t1
where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') and (d > 'xy2') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL idx_t1_0,idx_t1_1,idx_t1_2 NULL NULL NULL 128 11.02 Using where; Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (((`test`.`t1`.`a1` = 'b') or (`test`.`t1`.`a1` = 'd') or (`test`.`t1`.`a1` = 'a') or (`test`.`t1`.`a1` = 'c')) and (`test`.`t1`.`a2` > 'a') and (`test`.`t1`.`d` > 'xy2')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain extended select a1,a2,b,c from t1
where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') and (d > 'xy2') group by a1,a2,b,c;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL idx_t1_0,idx_t1_1,idx_t1_2 NULL NULL NULL 128 11.02 Using where; Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (((`test`.`t1`.`a1` = 'b') or (`test`.`t1`.`a1` = 'd') or (`test`.`t1`.`a1` = 'a') or (`test`.`t1`.`a1` = 'c')) and (`test`.`t1`.`a2` > 'a') and (`test`.`t1`.`d` > 'xy2')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`,`test`.`t1`.`c`
explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b') or (b < 'b') group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL 164 34.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)`,min(`test`.`t2`.`c`) AS `min(c)` from `test`.`t2` where (((`test`.`t2`.`b` = 'b') and (`test`.`t2`.`a2` = 'a')) or (`test`.`t2`.`b` < 'b')) group by `test`.`t2`.`a1`
explain extended select a1,a2,b from t1 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') and (c > 'a111') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 130 NULL 76 33.33 Using where; Using index
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (((`test`.`t1`.`a1` = 'b') or (`test`.`t1`.`a1` = 'd') or (`test`.`t1`.`a1` = 'a') or (`test`.`t1`.`a1` = 'c')) and (`test`.`t1`.`a2` > 'a') and (`test`.`t1`.`c` > 'a111')) group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select a1,a2,min(b),c from t2 where (a2 = 'a') and (c = 'a111') group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL 164 1.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,min(`test`.`t2`.`b`) AS `min(b)`,`test`.`t2`.`c` AS `c` from `test`.`t2` where ((`test`.`t2`.`c` = 'a111') and (`test`.`t2`.`a2` = 'a')) group by `test`.`t2`.`a1`
select a1,a2,min(b),c from t2 where (a2 = 'a') and (c = 'a111') group by a1;
a1 a2 min(b) c
a a a a111
explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b') or (b = 'a') group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index idx_t2_0,idx_t2_1,idx_t2_2 idx_t2_1 163 NULL 164 10.90 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,max(`test`.`t2`.`c`) AS `max(c)`,min(`test`.`t2`.`c`) AS `min(c)` from `test`.`t2` where (((`test`.`t2`.`b` = 'b') and (`test`.`t2`.`a2` = 'a')) or (`test`.`t2`.`b` = 'a')) group by `test`.`t2`.`a1`
explain select a1,a2,b,min(c),max(c) from t2
where (c > 'a000') and (c <= 'd999') and (c like '_8__') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index idx_t2_1,idx_t2_2 idx_t2_1 163 NULL 164 1.23 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,min(`test`.`t2`.`c`) AS `min(c)`,max(`test`.`t2`.`c`) AS `max(c)` from `test`.`t2` where ((`test`.`t2`.`c` > 'a000') and (`test`.`t2`.`c` <= 'd999') and (`test`.`t2`.`c` like '_8__')) group by `test`.`t2`.`a1`,`test`.`t2`.`a2`,`test`.`t2`.`b`
explain select a1, a2, b, c, min(d), max(d) from t1 group by a1,a2,b,c;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL idx_t1_1 NULL NULL NULL 128 100.00 Using temporary; Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c`,min(`test`.`t1`.`d`) AS `min(d)`,max(`test`.`t1`.`d`) AS `max(d)` from `test`.`t1` group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`,`test`.`t1`.`c`
explain select a1,a2,count(a2) from t1 group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index idx_t1_1,idx_t1_2 idx_t1_2 147 NULL 128 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,count(`test`.`t1`.`a2`) AS `count(a2)` from `test`.`t1` group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain extended select a1,a2,count(a2) from t1 where (a1 > 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_2 147 NULL 128 75.00 Using where; Using index
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,count(`test`.`t1`.`a2`) AS `count(a2)` from `test`.`t1` where (`test`.`t1`.`a1` > 'a') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain extended select sum(ord(a1)) from t1 where (a1 > 'a') group by a1,a2,b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_2 147 NULL 128 75.00 Using where; Using index
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select sum(ord(`test`.`t1`.`a1`)) AS `sum(ord(a1))` from `test`.`t1` where (`test`.`t1`.`a1` > 'a') group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
explain select distinct(a1) from t1 where ord(a2) = 98;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_2 147 NULL 128 100.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a1` AS `a1` from `test`.`t1` where (ord(`test`.`t1`.`a2`) = 98)
select distinct(a1) from t1 where ord(a2) = 98;
a1
a
b
c
d
explain select a1 from t1 where a2 = 'b' group by a1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 130 NULL 5 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a1` AS `a1` from `test`.`t1` where (`test`.`t1`.`a2` = 'b') group by `test`.`t1`.`a1`
select a1 from t1 where a2 = 'b' group by a1;
a1
a
b
c
d
explain select distinct a1 from t1 where a2 = 'b';
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 130 NULL 5 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a1` AS `a1` from `test`.`t1` where (`test`.`t1`.`a2` = 'b')
select distinct a1 from t1 where a2 = 'b';
a1
a
b
c
d
drop table t1,t2,t3;
create table t1 (c1 int not null,c2 int not null, primary key(c1,c2));
insert into t1 (c1,c2) values
(10,1),(10,2),(10,3),(20,4),(20,5),(20,6),(30,7),(30,8),(30,9);
select distinct c1, c2 from t1 order by c2;
c1 c2
10 1
10 2
10 3
20 4
20 5
20 6
30 7
30 8
30 9
select c1,min(c2) as c2 from t1 group by c1 order by c2;
c1 c2
10 1
20 4
30 7
select c1,c2 from t1 group by c1,c2 order by c2;
c1 c2
10 1
10 2
10 3
20 4
20 5
20 6
30 7
30 8
30 9
drop table t1;
CREATE TABLE t1 (a varchar(5), b int(11), PRIMARY KEY (a,b));
INSERT INTO t1 VALUES ('AA',1), ('AA',2), ('AA',3), ('BB',1), ('AA',4);
OPTIMIZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 optimize status OK
SELECT a FROM t1 WHERE a='AA' GROUP BY a;
a
AA
SELECT a FROM t1 WHERE a='BB' GROUP BY a;
a
BB
EXPLAIN SELECT a FROM t1 WHERE a='AA' GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range PRIMARY PRIMARY 7 NULL 1 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` = 'AA') group by `test`.`t1`.`a`
EXPLAIN SELECT a FROM t1 WHERE a='BB' GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ref PRIMARY PRIMARY 7 const 1 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` = 'BB') group by `test`.`t1`.`a`
SELECT DISTINCT a FROM t1 WHERE a='BB';
a
BB
SELECT DISTINCT a FROM t1 WHERE a LIKE 'B%';
a
BB
SELECT a FROM t1 WHERE a LIKE 'B%' GROUP BY a;
a
BB
DROP TABLE t1;
CREATE TABLE t1 (
a int(11) NOT NULL DEFAULT '0',
b varchar(16) COLLATE latin1_general_ci NOT NULL DEFAULT '',
PRIMARY KEY (a,b)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;
CREATE PROCEDURE a(x INT)
BEGIN
DECLARE rnd INT;
DECLARE cnt INT;
WHILE x > 0 DO
SET rnd= x % 100;
SET cnt = (SELECT COUNT(*) FROM t1 WHERE a = rnd);
INSERT INTO t1(a,b) VALUES (rnd, CAST(cnt AS CHAR));
SET x= x - 1;
END WHILE;
END|
CALL a(1000);
SELECT a FROM t1 WHERE a=0;
a
0
0
0
0
0
0
0
0
0
0
SELECT DISTINCT a FROM t1 WHERE a=0;
a
0
SELECT COUNT(DISTINCT a) FROM t1 WHERE a=0;
COUNT(DISTINCT a)
1
DROP TABLE t1;
DROP PROCEDURE a;
CREATE TABLE t1 (a varchar(64) NOT NULL default '', PRIMARY KEY(a));
INSERT INTO t1 (a) VALUES
(''), ('CENTRAL'), ('EASTERN'), ('GREATER LONDON'),
('NORTH CENTRAL'), ('NORTH EAST'), ('NORTH WEST'), ('SCOTLAND'),
('SOUTH EAST'), ('SOUTH WEST'), ('WESTERN');
EXPLAIN SELECT DISTINCT a,a FROM t1 ORDER BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index PRIMARY PRIMARY 66 NULL 11 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a` AS `a`,`test`.`t1`.`a` AS `a` from `test`.`t1` order by `test`.`t1`.`a`
SELECT DISTINCT a,a FROM t1 ORDER BY a;
a a
CENTRAL CENTRAL
EASTERN EASTERN
GREATER LONDON GREATER LONDON
NORTH CENTRAL NORTH CENTRAL
NORTH EAST NORTH EAST
NORTH WEST NORTH WEST
SCOTLAND SCOTLAND
SOUTH EAST SOUTH EAST
SOUTH WEST SOUTH WEST
WESTERN WESTERN
DROP TABLE t1;
CREATE TABLE t1 (id1 INT, id2 INT);
CREATE TABLE t2 (id2 INT, id3 INT, id5 INT);
CREATE TABLE t3 (id3 INT, id4 INT);
CREATE TABLE t4 (id4 INT);
CREATE TABLE t5 (id5 INT, id6 INT);
CREATE TABLE t6 (id6 INT);
INSERT INTO t1 VALUES(1,1);
INSERT INTO t2 VALUES(1,1,1);
INSERT INTO t3 VALUES(1,1);
INSERT INTO t4 VALUES(1);
INSERT INTO t5 VALUES(1,1);
INSERT INTO t6 VALUES(1);
SELECT * FROM
t1
NATURAL JOIN
(t2 JOIN (t3 NATURAL JOIN t4, t5 NATURAL JOIN t6)
ON (t3.id3 = t2.id3 AND t5.id5 = t2.id5));
id2 id1 id3 id5 id4 id3 id6 id5
1 1 1 1 1 1 1 1
SELECT * FROM
t1
NATURAL JOIN
(((t3 NATURAL JOIN t4) join (t5 NATURAL JOIN t6) on t3.id4 = t5.id5) JOIN t2
ON (t3.id3 = t2.id3 AND t5.id5 = t2.id5));
id2 id1 id4 id3 id6 id5 id3 id5
1 1 1 1 1 1 1 1
SELECT * FROM t1 NATURAL JOIN ((t3 join (t5 NATURAL JOIN t6)) JOIN t2);
id2 id1 id3 id4 id6 id5 id3 id5
1 1 1 1 1 1 1 1
SELECT * FROM
(t2 JOIN (t3 NATURAL JOIN t4, t5 NATURAL JOIN t6)
ON (t3.id3 = t2.id3 AND t5.id5 = t2.id5))
NATURAL JOIN
t1;
id2 id3 id5 id4 id3 id6 id5 id1
1 1 1 1 1 1 1 1
SELECT * FROM
(t2 JOIN ((t3 NATURAL JOIN t4) join (t5 NATURAL JOIN t6)))
NATURAL JOIN
t1;
id2 id3 id5 id4 id3 id6 id5 id1
1 1 1 1 1 1 1 1
DROP TABLE t1,t2,t3,t4,t5,t6;
CREATE TABLE t1 (a int, b int, PRIMARY KEY (a,b), KEY b (b));
INSERT INTO t1 VALUES (1,1),(1,2),(1,0),(1,3);
INSERT INTO t1 VALUES (2,1),(2,2),(2,0),(2,3);
INSERT INTO t1 VALUES (3,1),(3,2),(3,0),(3,3);
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status OK
explain SELECT MAX(b), a FROM t1 WHERE b < 2 AND a = 1 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range PRIMARY,b PRIMARY 8 NULL 1 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select max(`test`.`t1`.`b`) AS `MAX(b)`,`test`.`t1`.`a` AS `a` from `test`.`t1` where ((`test`.`t1`.`a` = 1) and (`test`.`t1`.`b` < 2)) group by `test`.`t1`.`a`
SELECT MAX(b), a FROM t1 WHERE b < 2 AND a = 1 GROUP BY a;
MAX(b) a
1 1
SELECT MIN(b), a FROM t1 WHERE b > 1 AND a = 1 GROUP BY a;
MIN(b) a
2 1
CREATE TABLE t2 (a int, b int, c int, PRIMARY KEY (a,b,c));
INSERT INTO t2 SELECT a,b,b FROM t1;
ANALYZE TABLE t2;
Table Op Msg_type Msg_text
test.t2 analyze status OK
explain SELECT MIN(c) FROM t2 WHERE b = 2 and a = 1 and c > 1 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range PRIMARY PRIMARY 12 NULL 1 100.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select min(`test`.`t2`.`c`) AS `MIN(c)` from `test`.`t2` where ((`test`.`t2`.`a` = 1) and (`test`.`t2`.`b` = 2) and (`test`.`t2`.`c` > 1)) group by `test`.`t2`.`a`
SELECT MIN(c) FROM t2 WHERE b = 2 and a = 1 and c > 1 GROUP BY a;
MIN(c)
2
DROP TABLE t1,t2;
CREATE TABLE t1 (a INT, b INT, INDEX (a,b));
INSERT INTO t1 (a, b) VALUES (1,1), (1,2), (1,3), (1,4), (1,5),
(2,2), (2,3), (2,1), (3,1), (4,1), (4,2), (4,3), (4,4), (4,5), (4,6),
(5,1), (5,2), (5,3), (5,4), (5,5);
EXPLAIN SELECT max(b), a FROM t1 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range a a 5 NULL 11 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select max(`test`.`t1`.`b`) AS `max(b)`,`test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a`
FLUSH STATUS;
SELECT max(b), a FROM t1 GROUP BY a;
max(b) a
5 1
3 2
1 3
6 4
5 5
SHOW STATUS LIKE 'handler_read__e%';
Variable_name Value
Handler_read_key 10
Handler_read_next 0
EXPLAIN SELECT max(b), a FROM t1 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range a a 5 NULL 11 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select max(`test`.`t1`.`b`) AS `max(b)`,`test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a`
FLUSH STATUS;
CREATE TABLE t2 SELECT max(b), a FROM t1 GROUP BY a;
SHOW STATUS LIKE 'handler_read__e%';
Variable_name Value
Handler_read_key 10
Handler_read_next 0
FLUSH STATUS;
SELECT * FROM (SELECT max(b), a FROM t1 GROUP BY a) b;
max(b) a
5 1
3 2
1 3
6 4
5 5
SHOW STATUS LIKE 'handler_read__e%';
Variable_name Value
Handler_read_key 10
Handler_read_next 0
FLUSH STATUS;
(SELECT max(b), a FROM t1 GROUP BY a) UNION
(SELECT max(b), a FROM t1 GROUP BY a);
max(b) a
5 1
3 2
1 3
6 4
5 5
SHOW STATUS LIKE 'handler_read__e%';
Variable_name Value
Handler_read_key 20
Handler_read_next 0
EXPLAIN (SELECT max(b), a FROM t1 GROUP BY a) UNION
(SELECT max(b), a FROM t1 GROUP BY a);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL range a a 5 NULL 11 100.00 Using index for group-by
2 UNION t1 NULL range a a 5 NULL 11 100.00 Using index for group-by
NULL UNION RESULT <union1,2> NULL ALL NULL NULL NULL NULL NULL NULL Using temporary
Warnings:
Note 1003 (/* select#1 */ select max(`test`.`t1`.`b`) AS `max(b)`,`test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a`) union (/* select#2 */ select max(`test`.`t1`.`b`) AS `max(b)`,`test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a`)
EXPLAIN SELECT (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) x
FROM t1 AS t1_outer;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_outer NULL index NULL a 10 NULL 20 100.00 Using index
2 SUBQUERY t1 NULL range a a 5 NULL 11 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select (/* select#2 */ select max(`test`.`t1`.`b`) from `test`.`t1` group by `test`.`t1`.`a` having (`test`.`t1`.`a` < 2)) AS `x` from `test`.`t1` `t1_outer`
EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE EXISTS
(SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_outer NULL index NULL a 10 NULL 20 100.00 Using index
2 SUBQUERY t1 NULL range a a 5 NULL 11 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` `t1_outer` where 1
EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE
(SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
2 SUBQUERY t1 NULL range a a 5 NULL 11 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` `t1_outer` where 0
EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE
a IN (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_outer NULL index NULL a 10 NULL 20 100.00 Using where; Using index
2 SUBQUERY t1 NULL range a a 5 NULL 11 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` `t1_outer` where <in_optimizer>(`test`.`t1_outer`.`a`,`test`.`t1_outer`.`a` in ( <materialize> (/* select#2 */ select max(`test`.`t1`.`b`) from `test`.`t1` group by `test`.`t1`.`a` having (`test`.`t1`.`a` < 2) ), <primary_index_lookup>(`test`.`t1_outer`.`a` in <temporary table> on <auto_key> where ((`test`.`t1_outer`.`a` = `materialized-subquery`.`max(b)`)))))
EXPLAIN SELECT 1 FROM t1 AS t1_outer GROUP BY a HAVING
a > (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_outer NULL range a a 5 NULL 11 100.00 Using index for group-by
2 SUBQUERY t1 NULL range a a 5 NULL 11 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` `t1_outer` group by `test`.`t1_outer`.`a` having (`test`.`t1_outer`.`a` > (/* select#2 */ select max(`test`.`t1`.`b`) from `test`.`t1` group by `test`.`t1`.`a` having (`test`.`t1`.`a` < 2)))
EXPLAIN SELECT 1 FROM t1 AS t1_outer1 JOIN t1 AS t1_outer2
ON t1_outer1.a = (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2)
AND t1_outer1.b = t1_outer2.b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_outer1 NULL ref a a 5 const 5 100.00 Using where; Using index
1 PRIMARY t1_outer2 NULL index NULL a 10 NULL 20 10.00 Using where; Using index; Using join buffer (Block Nested Loop)
2 SUBQUERY t1 NULL range a a 5 NULL 11 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` `t1_outer1` join `test`.`t1` `t1_outer2` where ((`test`.`t1_outer2`.`b` = `test`.`t1_outer1`.`b`) and (`test`.`t1_outer1`.`a` = (/* select#2 */ select max(`test`.`t1`.`b`) from `test`.`t1` group by `test`.`t1`.`a` having (`test`.`t1`.`a` < 2))))
EXPLAIN SELECT (SELECT (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) x
FROM t1 AS t1_outer) x2 FROM t1 AS t1_outer2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1_outer2 NULL index NULL a 10 NULL 20 100.00 Using index
2 SUBQUERY t1_outer NULL index NULL a 10 NULL 20 100.00 Using index
3 SUBQUERY t1 NULL range a a 5 NULL 11 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select (/* select#2 */ select (/* select#3 */ select max(`test`.`t1`.`b`) from `test`.`t1` group by `test`.`t1`.`a` having (`test`.`t1`.`a` < 2)) AS `x` from `test`.`t1` `t1_outer`) AS `x2` from `test`.`t1` `t1_outer2`
CREATE TABLE t3 LIKE t1;
FLUSH STATUS;
INSERT INTO t3 SELECT a,MAX(b) FROM t1 GROUP BY a;
SHOW STATUS LIKE 'handler_read__e%';
Variable_name Value
Handler_read_key 10
Handler_read_next 0
DELETE FROM t3;
FLUSH STATUS;
INSERT INTO t3 SELECT 1, (SELECT MAX(b) FROM t1 GROUP BY a HAVING a < 2)
FROM t1 LIMIT 1;
SHOW STATUS LIKE 'handler_read__e%';
Variable_name Value
Handler_read_key 10
Handler_read_next 0
FLUSH STATUS;
DELETE FROM t3 WHERE (SELECT MAX(b) FROM t1 GROUP BY a HAVING a < 2) > 10000;
SHOW STATUS LIKE 'handler_read__e%';
Variable_name Value
Handler_read_key 10
Handler_read_next 0
FLUSH STATUS;
DELETE FROM t3 WHERE (SELECT (SELECT MAX(b) FROM t1 GROUP BY a HAVING a < 2) x
FROM t1) > 10000;
ERROR 21000: Subquery returns more than 1 row
SHOW STATUS LIKE 'handler_read__e%';
Variable_name Value
Handler_read_key 10
Handler_read_next 1
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (a int, INDEX idx(a));
INSERT INTO t1 VALUES
(4), (2), (1), (2), (4), (2), (1), (4),
(4), (2), (1), (2), (2), (4), (1), (4),
(4), (2), (1), (2), (2), (4), (1), (4);
EXPLAIN SELECT DISTINCT(a) FROM t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx idx 5 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a` AS `a` from `test`.`t1`
SELECT DISTINCT(a) FROM t1;
a
1
2
4
EXPLAIN SELECT SQL_BIG_RESULT DISTINCT(a) FROM t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range idx idx 5 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select distinct sql_big_result `test`.`t1`.`a` AS `a` from `test`.`t1`
SELECT SQL_BIG_RESULT DISTINCT(a) FROM t1;
a
1
2
4
DROP TABLE t1;
CREATE TABLE t1 (a INT, b INT);
INSERT INTO t1 (a, b) VALUES (1,1), (1,2), (1,3);
INSERT INTO t1 SELECT a + 1, b FROM t1;
INSERT INTO t1 SELECT a + 2, b FROM t1;
INSERT INTO t1 SELECT a + 4, b FROM t1;
EXPLAIN
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 24 100.00 Using temporary; Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,min(`test`.`t1`.`b`) AS `MIN(b)`,max(`test`.`t1`.`b`) AS `MAX(b)` from `test`.`t1` group by `test`.`t1`.`a` desc order by `test`.`t1`.`a` desc
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
a MIN(b) MAX(b)
8 1 3
7 1 3
6 1 3
5 1 3
4 1 3
3 1 3
2 1 3
1 1 3
CREATE INDEX break_it ON t1 (a, b);
EXPLAIN
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range break_it break_it 10 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,min(`test`.`t1`.`b`) AS `MIN(b)`,max(`test`.`t1`.`b`) AS `MAX(b)` from `test`.`t1` group by `test`.`t1`.`a` order by `test`.`t1`.`a`
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a;
a MIN(b) MAX(b)
1 1 3
2 1 3
3 1 3
4 1 3
5 1 3
6 1 3
7 1 3
8 1 3
EXPLAIN
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range break_it break_it 10 NULL 10 100.00 Using index for group-by; Using temporary; Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,min(`test`.`t1`.`b`) AS `MIN(b)`,max(`test`.`t1`.`b`) AS `MAX(b)` from `test`.`t1` group by `test`.`t1`.`a` desc order by `test`.`t1`.`a` desc
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
a MIN(b) MAX(b)
8 1 3
7 1 3
6 1 3
5 1 3
4 1 3
3 1 3
2 1 3
1 1 3
EXPLAIN
SELECT a, MIN(b), MAX(b), AVG(b) FROM t1 GROUP BY a ORDER BY a DESC;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index break_it break_it 10 NULL 24 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,min(`test`.`t1`.`b`) AS `MIN(b)`,max(`test`.`t1`.`b`) AS `MAX(b)`,avg(`test`.`t1`.`b`) AS `AVG(b)` from `test`.`t1` group by `test`.`t1`.`a` desc order by `test`.`t1`.`a` desc
SELECT a, MIN(b), MAX(b), AVG(b) FROM t1 GROUP BY a ORDER BY a DESC;
a MIN(b) MAX(b) AVG(b)
8 1 3 2.0000
7 1 3 2.0000
6 1 3 2.0000
5 1 3 2.0000
4 1 3 2.0000
3 1 3 2.0000
2 1 3 2.0000
1 1 3 2.0000
DROP TABLE t1;
create table t1 (a int, b int, primary key (a,b), key `index` (a,b)) engine=MyISAM;
insert into t1 (a,b) values
(0,0),(0,1),(0,2),(0,3),(0,4),(0,5),(0,6),
(0,7),(0,8),(0,9),(0,10),(0,11),(0,12),(0,13),
(1,0),(1,1),(1,2),(1,3),(1,4),(1,5),(1,6),
(1,7),(1,8),(1,9),(1,10),(1,11),(1,12),(1,13),
(2,0),(2,1),(2,2),(2,3),(2,4),(2,5),(2,6),
(2,7),(2,8),(2,9),(2,10),(2,11),(2,12),(2,13),
(3,0),(3,1),(3,2),(3,3),(3,4),(3,5),(3,6),
(3,7),(3,8),(3,9),(3,10),(3,11),(3,12),(3,13);
insert into t1 (a,b) select a, max(b)+1 from t1 where a = 0 group by a;
select * from t1;
a b
0 0
0 1
0 2
0 3
0 4
0 5
0 6
0 7
0 8
0 9
0 10
0 11
0 12
0 13
0 14
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
2 0
2 1
2 2
2 3
2 4
2 5
2 6
2 7
2 8
2 9
2 10
2 11
2 12
2 13
3 0
3 1
3 2
3 3
3 4
3 5
3 6
3 7
3 8
3 9
3 10
3 11
3 12
3 13
explain extended select sql_buffer_result a, max(b)+1 from t1 where a = 0 group by a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range PRIMARY,index index 4 NULL 3 100.00 Using where; Using index for group-by; Using temporary
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select sql_buffer_result `test`.`t1`.`a` AS `a`,(max(`test`.`t1`.`b`) + 1) AS `max(b)+1` from `test`.`t1` where (`test`.`t1`.`a` = 0) group by `test`.`t1`.`a`
drop table t1;
CREATE TABLE t1 (a int, b int, c int, d int,
KEY foo (c,d,a,b), KEY bar (c,a,b,d));
INSERT INTO t1 VALUES (1, 1, 1, 1), (1, 1, 1, 2), (1, 1, 1, 3), (1, 1, 1, 4);
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT a,b,c+1,d FROM t1;
EXPLAIN SELECT DISTINCT c FROM t1 WHERE d=4;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range foo,bar foo 10 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`d` = 4)
SELECT DISTINCT c FROM t1 WHERE d=4;
c
1
2
DROP TABLE t1;
#
# Bug #45386: Wrong query result with MIN function in field list,
# WHERE and GROUP BY clause
#
CREATE TABLE t (a INT, b INT, INDEX (a,b));
INSERT INTO t VALUES (2,0), (2,0), (2,1), (2,1);
INSERT INTO t SELECT * FROM t;
INSERT INTO t SELECT * FROM t;
INSERT INTO t SELECT * FROM t;
# test MIN
#should use range with index for group by
EXPLAIN
SELECT a, MIN(b) FROM t WHERE b <> 0 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t NULL range a a 10 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t`.`a` AS `a`,min(`test`.`t`.`b`) AS `MIN(b)` from `test`.`t` where (`test`.`t`.`b` <> 0) group by `test`.`t`.`a`
#should return 1 row
SELECT a, MIN(b) FROM t WHERE b <> 0 GROUP BY a;
a MIN(b)
2 1
# test MAX
#should use range with index for group by
EXPLAIN
SELECT a, MAX(b) FROM t WHERE b <> 1 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t NULL range a a 10 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t`.`a` AS `a`,max(`test`.`t`.`b`) AS `MAX(b)` from `test`.`t` where (`test`.`t`.`b` <> 1) group by `test`.`t`.`a`
#should return 1 row
SELECT a, MAX(b) FROM t WHERE b <> 1 GROUP BY a;
a MAX(b)
2 0
# test 3 ranges and use the middle one
INSERT INTO t SELECT a, 2 FROM t;
#should use range with index for group by
EXPLAIN
SELECT a, MAX(b) FROM t WHERE b > 0 AND b < 2 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t NULL range a a 10 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t`.`a` AS `a`,max(`test`.`t`.`b`) AS `MAX(b)` from `test`.`t` where ((`test`.`t`.`b` > 0) and (`test`.`t`.`b` < 2)) group by `test`.`t`.`a`
#should return 1 row
SELECT a, MAX(b) FROM t WHERE b > 0 AND b < 2 GROUP BY a;
a MAX(b)
2 1
DROP TABLE t;
#
# Bug #48472: Loose index scan inappropriately chosen for some WHERE
# conditions
#
CREATE TABLE t (a INT, b INT, INDEX (a,b));
INSERT INTO t VALUES (2,0), (2,0), (2,1), (2,1);
INSERT INTO t SELECT * FROM t;
SELECT a, MAX(b) FROM t WHERE 0=b+0 GROUP BY a;
a MAX(b)
2 0
DROP TABLE t;
End of 5.0 tests
#
# Bug #46607: Assertion failed: (cond_type == Item::FUNC_ITEM) results in
# server crash
#
CREATE TABLE t (a INT, b INT, INDEX (a,b));
INSERT INTO t VALUES (2,0), (2,0), (2,1), (2,1);
INSERT INTO t SELECT * FROM t;
SELECT a, MAX(b) FROM t WHERE b GROUP BY a;
a MAX(b)
2 1
DROP TABLE t;
CREATE TABLE t1(a INT NOT NULL, b INT NOT NULL, KEY (b));
INSERT INTO t1 VALUES(1,1),(2,1);
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status OK
SELECT 1 AS c, b FROM t1 WHERE b IN (1,2) GROUP BY c, b;
c b
1 1
SELECT a FROM t1 WHERE b=1;
a
1
2
DROP TABLE t1;
#
# Bug#47762: Incorrect result from MIN() when WHERE tests NOT NULL column
# for NULL
#
## Test for NULLs allowed
CREATE TABLE t1 ( a INT, KEY (a) );
INSERT INTO t1 VALUES (1), (2), (3);
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a = NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a = NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a <> NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a <> NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a > NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a > NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a < NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a < NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a <=> NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL No matching min/max row
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a <=> NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND 10;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a BETWEEN 10 AND NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a BETWEEN 10 AND NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
x x x NULL x x x x x x 100.00 Using where; Using index
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0);
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a IS NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL No matching min/max row
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a IS NULL;
MIN( a )
NULL
INSERT INTO t1 VALUES (NULL), (NULL);
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a = NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a = NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a <> NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a <> NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a > NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a > NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a < NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a < NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a <=> NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL Select tables optimized away
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a <=> NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND 10;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a BETWEEN 10 AND NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a BETWEEN 10 AND NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
x x x NULL x x x x x x 100.00 Using where; Using index
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0);
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a IS NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL Select tables optimized away
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a IS NULL;
MIN( a )
NULL
DROP TABLE t1;
## Test for NOT NULLs
CREATE TABLE t1 ( a INT NOT NULL PRIMARY KEY);
INSERT INTO t1 VALUES (1), (2), (3);
#
# NULL-safe operator test disabled for non-NULL indexed columns.
#
# See bugs
#
# - Bug#52173: Reading NULL value from non-NULL index gives
# wrong result in embedded server
#
# - Bug#52174: Sometimes wrong plan when reading a MAX value from
# non-NULL index
#
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a = NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a = NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a <> NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a <> NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a > NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a > NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a < NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a < NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND 10;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a BETWEEN 10 AND NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a BETWEEN 10 AND NULL;
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL no matching row in const table
x x x NULL x x x x x x 100.00 Using where; Using index
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0);
MIN( a )
NULL
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a IS NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
x x x NULL x x x x x x NULL Impossible WHERE
Warnings:
x x x
SELECT MIN( a ) FROM t1 WHERE a IS NULL;
MIN( a )
NULL
DROP TABLE t1;
#
# Bug#53859: Valgrind: opt_sum_query(TABLE_LIST*, List<Item>&, Item*) at
# opt_sum.cc:305
#
CREATE TABLE t1 ( a INT, KEY (a) );
INSERT INTO t1 VALUES (1), (2), (3);
SELECT MIN( a ) AS min_a
FROM t1
WHERE a > 1 AND a IS NULL
ORDER BY min_a;
min_a
NULL
DROP TABLE t1;
End of 5.1 tests
#
# WL#3220 (Loose index scan for COUNT DISTINCT)
#
CREATE TABLE t1 (a INT, b INT, c INT, KEY (a,b));
INSERT INTO t1 VALUES (1,1,1), (1,2,1), (1,3,1), (1,4,1);
INSERT INTO t1 SELECT a, b + 4, 1 FROM t1;
INSERT INTO t1 SELECT a + 1, b, 1 FROM t1;
INSERT INTO t1 SELECT a + 2, b + 8, 1 FROM t1;
CREATE TABLE t2 (a INT, b INT, c INT, d INT, e INT, f INT, KEY (a,b,c));
INSERT INTO t2 VALUES (1,1,1,1,1,1), (1,2,1,1,1,1), (1,3,1,1,1,1),
(1,4,1,1,1,1);
INSERT INTO t2 SELECT a, b + 4, c,d,e,f FROM t2;
INSERT INTO t2 SELECT a + 1, b, c,d,e,f FROM t2;
INSERT INTO t2 SELECT a + 2, b + 8, c,d,e,f FROM t2;
EXPLAIN SELECT COUNT(DISTINCT a) FROM t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range a a 5 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT a)` from `test`.`t1`
SELECT COUNT(DISTINCT a) FROM t1;
COUNT(DISTINCT a)
4
EXPLAIN SELECT COUNT(DISTINCT a,b) FROM t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range a a 10 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`a`,`test`.`t1`.`b`) AS `COUNT(DISTINCT a,b)` from `test`.`t1`
SELECT COUNT(DISTINCT a,b) FROM t1;
COUNT(DISTINCT a,b)
32
EXPLAIN SELECT COUNT(DISTINCT b,a) FROM t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range a a 10 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`b`,`test`.`t1`.`a`) AS `COUNT(DISTINCT b,a)` from `test`.`t1`
SELECT COUNT(DISTINCT b,a) FROM t1;
COUNT(DISTINCT b,a)
32
EXPLAIN SELECT COUNT(DISTINCT b) FROM t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index a a 10 NULL 32 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`b`) AS `COUNT(DISTINCT b)` from `test`.`t1`
SELECT COUNT(DISTINCT b) FROM t1;
COUNT(DISTINCT b)
16
EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range a a 5 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT a)` from `test`.`t1` group by `test`.`t1`.`a`
SELECT COUNT(DISTINCT a) FROM t1 GROUP BY a;
COUNT(DISTINCT a)
1
1
1
1
EXPLAIN SELECT COUNT(DISTINCT b) FROM t1 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range a a 10 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`b`) AS `COUNT(DISTINCT b)` from `test`.`t1` group by `test`.`t1`.`a`
SELECT COUNT(DISTINCT b) FROM t1 GROUP BY a;
COUNT(DISTINCT b)
8
8
8
8
EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 GROUP BY b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index a a 10 NULL 32 100.00 Using index; Using filesort
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT a)` from `test`.`t1` group by `test`.`t1`.`b`
SELECT COUNT(DISTINCT a) FROM t1 GROUP BY b;
COUNT(DISTINCT a)
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
EXPLAIN SELECT DISTINCT COUNT(DISTINCT a) FROM t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range a a 5 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT a)` from `test`.`t1`
SELECT DISTINCT COUNT(DISTINCT a) FROM t1;
COUNT(DISTINCT a)
4
EXPLAIN SELECT COUNT(DISTINCT a, b + 0) FROM t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index NULL a 10 NULL 32 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`a`,(`test`.`t1`.`b` + 0)) AS `COUNT(DISTINCT a, b + 0)` from `test`.`t1`
SELECT COUNT(DISTINCT a, b + 0) FROM t1;
COUNT(DISTINCT a, b + 0)
32
EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 HAVING COUNT(DISTINCT b) < 20;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index NULL a 10 NULL 32 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT a)` from `test`.`t1` having (count(distinct `test`.`t1`.`b`) < 20)
SELECT COUNT(DISTINCT a) FROM t1 HAVING COUNT(DISTINCT b) < 20;
COUNT(DISTINCT a)
4
EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 HAVING COUNT(DISTINCT c) < 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 32 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT a)` from `test`.`t1` having (count(distinct `test`.`t1`.`c`) < 10)
SELECT COUNT(DISTINCT a) FROM t1 HAVING COUNT(DISTINCT c) < 10;
COUNT(DISTINCT a)
4
EXPLAIN SELECT 1 FROM t1 HAVING COUNT(DISTINCT a) < 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range a a 5 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` having (count(distinct `test`.`t1`.`a`) < 10)
SELECT 1 FROM t1 HAVING COUNT(DISTINCT a) < 10;
1
1
EXPLAIN SELECT 1 FROM t1 GROUP BY a HAVING COUNT(DISTINCT b) > 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range a a 10 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` group by `test`.`t1`.`a` having (count(distinct `test`.`t1`.`b`) > 1)
SELECT 1 FROM t1 GROUP BY a HAVING COUNT(DISTINCT b) > 1;
1
1
1
1
1
EXPLAIN SELECT COUNT(DISTINCT t1_1.a) FROM t1 t1_1, t1 t1_2 GROUP BY t1_1.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1_1 NULL index a a 10 NULL 32 100.00 Using index; Using temporary; Using filesort
1 SIMPLE t1_2 NULL index NULL a 10 NULL 32 100.00 Using index; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1_1`.`a`) AS `COUNT(DISTINCT t1_1.a)` from `test`.`t1` `t1_1` join `test`.`t1` `t1_2` group by `test`.`t1_1`.`a`
SELECT COUNT(DISTINCT t1_1.a) FROM t1 t1_1, t1 t1_2 GROUP BY t1_1.a;
COUNT(DISTINCT t1_1.a)
1
1
1
1
EXPLAIN SELECT COUNT(DISTINCT a), 12 FROM t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range a a 5 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT a)`,12 AS `12` from `test`.`t1`
SELECT COUNT(DISTINCT a), 12 FROM t1;
COUNT(DISTINCT a) 12
4 12
EXPLAIN SELECT COUNT(DISTINCT a, b, c) FROM t2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range a a 15 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t2`.`a`,`test`.`t2`.`b`,`test`.`t2`.`c`) AS `COUNT(DISTINCT a, b, c)` from `test`.`t2`
SELECT COUNT(DISTINCT a, b, c) FROM t2;
COUNT(DISTINCT a, b, c)
32
EXPLAIN SELECT COUNT(DISTINCT a), SUM(DISTINCT a), AVG(DISTINCT a) FROM t2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range a a 5 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t2`.`a`) AS `COUNT(DISTINCT a)`,sum(distinct `test`.`t2`.`a`) AS `SUM(DISTINCT a)`,avg(distinct `test`.`t2`.`a`) AS `AVG(DISTINCT a)` from `test`.`t2`
SELECT COUNT(DISTINCT a), SUM(DISTINCT a), AVG(DISTINCT a) FROM t2;
COUNT(DISTINCT a) SUM(DISTINCT a) AVG(DISTINCT a)
4 10 2.5000
EXPLAIN SELECT COUNT(DISTINCT a), SUM(DISTINCT a), AVG(DISTINCT f) FROM t2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 32 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t2`.`a`) AS `COUNT(DISTINCT a)`,sum(distinct `test`.`t2`.`a`) AS `SUM(DISTINCT a)`,avg(distinct `test`.`t2`.`f`) AS `AVG(DISTINCT f)` from `test`.`t2`
SELECT COUNT(DISTINCT a), SUM(DISTINCT a), AVG(DISTINCT f) FROM t2;
COUNT(DISTINCT a) SUM(DISTINCT a) AVG(DISTINCT f)
4 10 1.0000
EXPLAIN SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, a) FROM t2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range a a 10 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t2`.`a`,`test`.`t2`.`b`) AS `COUNT(DISTINCT a, b)`,count(distinct `test`.`t2`.`b`,`test`.`t2`.`a`) AS `COUNT(DISTINCT b, a)` from `test`.`t2`
SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, a) FROM t2;
COUNT(DISTINCT a, b) COUNT(DISTINCT b, a)
32 32
EXPLAIN SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, f) FROM t2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 32 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t2`.`a`,`test`.`t2`.`b`) AS `COUNT(DISTINCT a, b)`,count(distinct `test`.`t2`.`b`,`test`.`t2`.`f`) AS `COUNT(DISTINCT b, f)` from `test`.`t2`
SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, f) FROM t2;
COUNT(DISTINCT a, b) COUNT(DISTINCT b, f)
32 16
EXPLAIN SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, d) FROM t2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 32 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t2`.`a`,`test`.`t2`.`b`) AS `COUNT(DISTINCT a, b)`,count(distinct `test`.`t2`.`b`,`test`.`t2`.`d`) AS `COUNT(DISTINCT b, d)` from `test`.`t2`
SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, d) FROM t2;
COUNT(DISTINCT a, b) COUNT(DISTINCT b, d)
32 16
EXPLAIN SELECT a, c, COUNT(DISTINCT c, a, b) FROM t2 GROUP BY a, b, c;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range a a 15 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`c` AS `c`,count(distinct `test`.`t2`.`c`,`test`.`t2`.`a`,`test`.`t2`.`b`) AS `COUNT(DISTINCT c, a, b)` from `test`.`t2` group by `test`.`t2`.`a`,`test`.`t2`.`b`,`test`.`t2`.`c`
SELECT a, c, COUNT(DISTINCT c, a, b) FROM t2 GROUP BY a, b, c;
a c COUNT(DISTINCT c, a, b)
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
2 1 1
2 1 1
2 1 1
2 1 1
2 1 1
2 1 1
2 1 1
2 1 1
3 1 1
3 1 1
3 1 1
3 1 1
3 1 1
3 1 1
3 1 1
3 1 1
4 1 1
4 1 1
4 1 1
4 1 1
4 1 1
4 1 1
4 1 1
4 1 1
EXPLAIN SELECT COUNT(DISTINCT c, a, b) FROM t2
WHERE a > 5 AND b BETWEEN 10 AND 20 GROUP BY a, b, c;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range a a 5 NULL 1 11.11 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t2`.`c`,`test`.`t2`.`a`,`test`.`t2`.`b`) AS `COUNT(DISTINCT c, a, b)` from `test`.`t2` where ((`test`.`t2`.`a` > 5) and (`test`.`t2`.`b` between 10 and 20)) group by `test`.`t2`.`a`,`test`.`t2`.`b`,`test`.`t2`.`c`
SELECT COUNT(DISTINCT c, a, b) FROM t2
WHERE a > 5 AND b BETWEEN 10 AND 20 GROUP BY a, b, c;
COUNT(DISTINCT c, a, b)
EXPLAIN SELECT COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 WHERE a = 5
GROUP BY b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ref a a 5 const 1 100.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t2`.`b`) AS `COUNT(DISTINCT b)`,sum(distinct `test`.`t2`.`b`) AS `SUM(DISTINCT b)` from `test`.`t2` where (`test`.`t2`.`a` = 5) group by `test`.`t2`.`b`
SELECT COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 WHERE a = 5
GROUP BY b;
COUNT(DISTINCT b) SUM(DISTINCT b)
EXPLAIN SELECT a, COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range a a 10 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,count(distinct `test`.`t2`.`b`) AS `COUNT(DISTINCT b)`,sum(distinct `test`.`t2`.`b`) AS `SUM(DISTINCT b)` from `test`.`t2` group by `test`.`t2`.`a`
SELECT a, COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 GROUP BY a;
a COUNT(DISTINCT b) SUM(DISTINCT b)
1 8 36
2 8 36
3 8 100
4 8 100
EXPLAIN SELECT COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range a a 10 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t2`.`b`) AS `COUNT(DISTINCT b)`,sum(distinct `test`.`t2`.`b`) AS `SUM(DISTINCT b)` from `test`.`t2` group by `test`.`t2`.`a`
SELECT COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 GROUP BY a;
COUNT(DISTINCT b) SUM(DISTINCT b)
8 36
8 36
8 100
8 100
EXPLAIN SELECT COUNT(DISTINCT a, b) FROM t2 WHERE c = 13 AND d = 42;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL a NULL NULL NULL 32 3.12 Using where
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t2`.`a`,`test`.`t2`.`b`) AS `COUNT(DISTINCT a, b)` from `test`.`t2` where ((`test`.`t2`.`d` = 42) and (`test`.`t2`.`c` = 13))
SELECT COUNT(DISTINCT a, b) FROM t2 WHERE c = 13 AND d = 42;
COUNT(DISTINCT a, b)
0
EXPLAIN SELECT a, COUNT(DISTINCT a), SUM(DISTINCT a) FROM t2
WHERE b = 13 AND c = 42 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range a a 15 NULL 10 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,count(distinct `test`.`t2`.`a`) AS `COUNT(DISTINCT a)`,sum(distinct `test`.`t2`.`a`) AS `SUM(DISTINCT a)` from `test`.`t2` where ((`test`.`t2`.`c` = 42) and (`test`.`t2`.`b` = 13)) group by `test`.`t2`.`a`
SELECT a, COUNT(DISTINCT a), SUM(DISTINCT a) FROM t2
WHERE b = 13 AND c = 42 GROUP BY a;
a COUNT(DISTINCT a) SUM(DISTINCT a)
# This query could have been resolved using loose index scan since
# the second part of count(..) is defined by a constant predicate
EXPLAIN SELECT COUNT(DISTINCT a, b), SUM(DISTINCT a) FROM t2 WHERE b = 42;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index NULL a 15 NULL 32 10.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select count(distinct `test`.`t2`.`a`,`test`.`t2`.`b`) AS `COUNT(DISTINCT a, b)`,sum(distinct `test`.`t2`.`a`) AS `SUM(DISTINCT a)` from `test`.`t2` where (`test`.`t2`.`b` = 42)
SELECT COUNT(DISTINCT a, b), SUM(DISTINCT a) FROM t2 WHERE b = 42;
COUNT(DISTINCT a, b) SUM(DISTINCT a)
0 NULL
EXPLAIN SELECT SUM(DISTINCT a), MAX(b) FROM t2 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index a a 15 NULL 32 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select sum(distinct `test`.`t2`.`a`) AS `SUM(DISTINCT a)`,max(`test`.`t2`.`b`) AS `MAX(b)` from `test`.`t2` group by `test`.`t2`.`a`
SELECT SUM(DISTINCT a), MAX(b) FROM t2 GROUP BY a;
SUM(DISTINCT a) MAX(b)
1 8
2 8
3 16
4 16
EXPLAIN SELECT 42 * (a + c + COUNT(DISTINCT c, a, b)) FROM t2 GROUP BY a, b, c;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL range a a 15 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 /* select#1 */ select (42 * ((`test`.`t2`.`a` + `test`.`t2`.`c`) + count(distinct `test`.`t2`.`c`,`test`.`t2`.`a`,`test`.`t2`.`b`))) AS `42 * (a + c + COUNT(DISTINCT c, a, b))` from `test`.`t2` group by `test`.`t2`.`a`,`test`.`t2`.`b`,`test`.`t2`.`c`
SELECT 42 * (a + c + COUNT(DISTINCT c, a, b)) FROM t2 GROUP BY a, b, c;
42 * (a + c + COUNT(DISTINCT c, a, b))
126
126
126
126
126
126
126
126
168
168
168
168
168
168
168
168
210
210
210
210
210
210
210
210
252
252
252
252
252
252
252
252
EXPLAIN SELECT (SUM(DISTINCT a) + MAX(b)) FROM t2 GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index a a 15 NULL 32 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select (sum(distinct `test`.`t2`.`a`) + max(`test`.`t2`.`b`)) AS `(SUM(DISTINCT a) + MAX(b))` from `test`.`t2` group by `test`.`t2`.`a`
SELECT (SUM(DISTINCT a) + MAX(b)) FROM t2 GROUP BY a;
(SUM(DISTINCT a) + MAX(b))
9
10
19
20
DROP TABLE t1,t2;
# end of WL#3220 tests
#
# Bug#50539: Wrong result when loose index scan is used for an aggregate
# function with distinct
#
CREATE TABLE t1 (
f1 int(11) NOT NULL DEFAULT '0',
f2 char(1) NOT NULL DEFAULT '',
PRIMARY KEY (f1,f2)
) ;
insert into t1 values(1,'A'),(1 , 'B'), (1, 'C'), (2, 'A'),
(3, 'A'), (3, 'B'), (3, 'C'), (3, 'D');
SELECT f1, COUNT(DISTINCT f2) FROM t1 GROUP BY f1;
f1 COUNT(DISTINCT f2)
1 3
2 1
3 4
explain SELECT f1, COUNT(DISTINCT f2) FROM t1 GROUP BY f1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range PRIMARY PRIMARY 5 NULL 9 100.00 Using index for group-by (scanning)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,count(distinct `test`.`t1`.`f2`) AS `COUNT(DISTINCT f2)` from `test`.`t1` group by `test`.`t1`.`f1`
drop table t1;
# End of test#50539.
#
# Bug#18497308 WRONG COST ESTIMATE FOR LOOSE INDEX SCAN WHEN
# INDEX STATISTICS IS MISSING
#
CREATE TABLE t1 (
a INTEGER,
b INTEGER,
c INTEGER,
d INTEGER,
KEY foo (a,b,c,d)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1, 1, 1, 1), (1, 2, 1, 2), (1, 3, 1, 3), (1, 4, 1, 4);
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
EXPLAIN SELECT DISTINCT a FROM t1 WHERE b=4;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range foo foo 10 NULL 101 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`b` = 4)
SELECT DISTINCT a FROM t1 WHERE b=4;
a
1
DROP TABLE t1;
#
# Bug#17217128 - BAD INTERACTION BETWEEN MIN/MAX AND
# "HAVING SUM(DISTINCT)": WRONG RESULTS.
#
CREATE TABLE t (a INT, b INT, KEY(a,b));
INSERT INTO t VALUES (1,1), (2,2), (3,3), (4,4), (1,0), (3,2), (4,5);
set optimizer_trace_max_mem_size=1048576;
set @@session.optimizer_trace='enabled=on';
set end_markers_in_json=on;
ANALYZE TABLE t;
Table Op Msg_type Msg_text
test.t analyze status OK
SELECT a, SUM(DISTINCT a), MIN(b) FROM t GROUP BY a;
a SUM(DISTINCT a) MIN(b)
1 1 0
2 2 2
3 3 2
4 4 4
EXPLAIN SELECT a, SUM(DISTINCT a), MIN(b) FROM t GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t NULL index a a 10 NULL 7 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t`.`a` AS `a`,sum(distinct `test`.`t`.`a`) AS `SUM(DISTINCT a)`,min(`test`.`t`.`b`) AS `MIN(b)` from `test`.`t` group by `test`.`t`.`a`
SELECT TRACE RLIKE 'have_both_agg_distinct_and_min_max' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
SELECT a, SUM(DISTINCT a), MAX(b) FROM t GROUP BY a;
a SUM(DISTINCT a) MAX(b)
1 1 1
2 2 2
3 3 3
4 4 5
EXPLAIN SELECT a, SUM(DISTINCT a), MAX(b) FROM t GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t NULL index a a 10 NULL 7 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t`.`a` AS `a`,sum(distinct `test`.`t`.`a`) AS `SUM(DISTINCT a)`,max(`test`.`t`.`b`) AS `MAX(b)` from `test`.`t` group by `test`.`t`.`a`
SELECT TRACE RLIKE 'have_both_agg_distinct_and_min_max' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
SELECT a, MAX(b) FROM t GROUP BY a HAVING SUM(DISTINCT a);
a MAX(b)
1 1
2 2
3 3
4 5
EXPLAIN SELECT a, MAX(b) FROM t GROUP BY a HAVING SUM(DISTINCT a);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t NULL index a a 10 NULL 7 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t`.`a` AS `a`,max(`test`.`t`.`b`) AS `MAX(b)` from `test`.`t` group by `test`.`t`.`a` having sum(distinct `test`.`t`.`a`)
SELECT TRACE RLIKE 'have_both_agg_distinct_and_min_max' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
SELECT SUM(DISTINCT a), MIN(b), MAX(b) FROM t;
SUM(DISTINCT a) MIN(b) MAX(b)
10 0 5
EXPLAIN SELECT SUM(DISTINCT a), MIN(b), MAX(b) FROM t;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t NULL index a a 10 NULL 7 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select sum(distinct `test`.`t`.`a`) AS `SUM(DISTINCT a)`,min(`test`.`t`.`b`) AS `MIN(b)`,max(`test`.`t`.`b`) AS `MAX(b)` from `test`.`t`
SELECT TRACE RLIKE 'have_both_agg_distinct_and_min_max' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
SELECT a, SUM(DISTINCT a), MIN(b), MAX(b) FROM t GROUP BY a;
a SUM(DISTINCT a) MIN(b) MAX(b)
1 1 0 1
2 2 2 2
3 3 2 3
4 4 4 5
EXPLAIN SELECT a, SUM(DISTINCT a), MIN(b), MAX(b) FROM t GROUP BY a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t NULL index a a 10 NULL 7 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t`.`a` AS `a`,sum(distinct `test`.`t`.`a`) AS `SUM(DISTINCT a)`,min(`test`.`t`.`b`) AS `MIN(b)`,max(`test`.`t`.`b`) AS `MAX(b)` from `test`.`t` group by `test`.`t`.`a`
SELECT TRACE RLIKE 'have_both_agg_distinct_and_min_max' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
SET optimizer_trace_max_mem_size=DEFAULT;
SET optimizer_trace=DEFAULT;
SET end_markers_in_json=DEFAULT;
DROP TABLE t;
#
# Bug #18066518: THE COST VALUE IS A NEGATIVE NUMBER FOR MERGE ENGINE
# TABLE
#
CREATE TABLE t(a INT PRIMARY KEY)
ENGINE = MERGE;
EXPLAIN SELECT DISTINCT(a) FROM t;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t NULL index PRIMARY PRIMARY 4 NULL 0 0.00 Using index
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t`.`a` AS `a` from `test`.`t`
SELECT DISTINCT(a) FROM t;
a
DROP TABLE t;
# End of test#18066518.
#
# Bug #18486293: ASSERTION FAILED: KEYS >= 0.0 IN
# COST_MODEL_TABLE::KEY_COMPARE_COST
#
CREATE TABLE t (b INT, KEY b_key (b)) ENGINE=INNODB
PARTITION BY RANGE COLUMNS(b) (PARTITION p_part VALUES LESS THAN (0));
SELECT 1 FROM t WHERE b IN ('') GROUP BY b ;
1
DROP TABLE t;
# End of test#18486293.
#
# Bug#18109609: LOOSE INDEX SCAN IS NOT USED WHEN IT SHOULD
#
CREATE TABLE t1 (
id INT AUTO_INCREMENT PRIMARY KEY,
c1 INT,
c2 INT,
KEY(c1,c2));
INSERT INTO t1(c1,c2) VALUES
(1, 1), (1,2), (2,1), (2,2), (3,1), (3,2), (3,3), (4,1), (4,2), (4,3),
(4,4), (4,5), (4,6), (4,7), (4,8), (4,9), (4,10), (4,11), (4,12), (4,13),
(4,14), (4,15), (4,16), (4,17), (4,18), (4,19), (4,20),(5,5);
EXPLAIN SELECT MAX(c2), c1 FROM t1 WHERE c1 = 4 GROUP BY c1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range c1 c1 5 NULL 7 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select max(`test`.`t1`.`c2`) AS `MAX(c2)`,`test`.`t1`.`c1` AS `c1` from `test`.`t1` where (`test`.`t1`.`c1` = 4) group by `test`.`t1`.`c1`
FLUSH STATUS;
SELECT MAX(c2), c1 FROM t1 WHERE c1 = 4 GROUP BY c1;
MAX(c2) c1
20 4
SHOW SESSION STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 3
Handler_read_last 1
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 0
DROP TABLE t1;
# End of test for Bug#18109609
#
# Bug#24423143 - WRONG RESULTS FOR AGGREGATE QUERY
#
# Test index merge tree scenario
CREATE TABLE a (
aggr_col int,
group_by_col int,
KEY aggr_col_key (aggr_col),
KEY group_by_col_key (group_by_col, aggr_col)
) ENGINE=InnoDB;
set optimizer_trace_max_mem_size=1048576;
set @@session.optimizer_trace='enabled=on';
set end_markers_in_json=on;
INSERT INTO a VALUES (2,3),(5,6),(6,3),(7,NULL),(9,NULL),(10,6);
ANALYZE TABLE a;
Table Op Msg_type Msg_text
test.a analyze status OK
SELECT group_by_col, MIN(aggr_col) FROM a
WHERE (group_by_col IN (70, 9)) OR (aggr_col > 2) GROUP BY group_by_col;
group_by_col MIN(aggr_col)
NULL 7
3 6
6 5
EXPLAIN SELECT group_by_col, MIN(aggr_col) FROM a
WHERE (group_by_col IN (70 ,9)) OR (aggr_col > 2) GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL index aggr_col_key,group_by_col_key group_by_col_key 10 NULL 6 55.55 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,min(`test`.`a`.`aggr_col`) AS `MIN(aggr_col)` from `test`.`a` where ((`test`.`a`.`group_by_col` in (70,9)) or (`test`.`a`.`aggr_col` > 2)) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'disjuntive_predicate_present' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
SELECT group_by_col, MAX(aggr_col) FROM a
WHERE (group_by_col IN (70, 9)) OR (aggr_col < 9) GROUP BY group_by_col;
group_by_col MAX(aggr_col)
NULL 7
3 6
6 5
EXPLAIN SELECT group_by_col, MAX(aggr_col) FROM a
WHERE (group_by_col IN (70 , 9)) OR (aggr_col < 9) GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL index aggr_col_key,group_by_col_key group_by_col_key 10 NULL 6 55.55 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,max(`test`.`a`.`aggr_col`) AS `MAX(aggr_col)` from `test`.`a` where ((`test`.`a`.`group_by_col` in (70,9)) or (`test`.`a`.`aggr_col` < 9)) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'disjuntive_predicate_present' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
# Test IMPOSSIBLE TREE scenario
ALTER TABLE a DROP KEY aggr_col_key;
SELECT group_by_col, MIN(aggr_col) FROM a
WHERE (group_by_col IN (70 ,9)) OR (aggr_col > 2) GROUP BY group_by_col;
group_by_col MIN(aggr_col)
NULL 7
3 6
6 5
EXPLAIN SELECT group_by_col, MIN(aggr_col) FROM a
WHERE (group_by_col IN (70, 9)) OR (aggr_col > 2) GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL index group_by_col_key group_by_col_key 10 NULL 6 55.55 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,min(`test`.`a`.`aggr_col`) AS `MIN(aggr_col)` from `test`.`a` where ((`test`.`a`.`group_by_col` in (70,9)) or (`test`.`a`.`aggr_col` > 2)) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'minmax_keypart_in_disjunctive_query' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
SELECT group_by_col, MAX(aggr_col) FROM a
WHERE (group_by_col IN (70, 9)) OR (aggr_col < 9) GROUP BY group_by_col;
group_by_col MAX(aggr_col)
NULL 7
3 6
6 5
EXPLAIN SELECT group_by_col, MAX(aggr_col) FROM a
WHERE (group_by_col IN (70, 9)) OR (aggr_col < 9) GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL index group_by_col_key group_by_col_key 10 NULL 6 55.55 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,max(`test`.`a`.`aggr_col`) AS `MAX(aggr_col)` from `test`.`a` where ((`test`.`a`.`group_by_col` in (70,9)) or (`test`.`a`.`aggr_col` < 9)) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'minmax_keypart_in_disjunctive_query' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
# Scenario 3: aggregate field used as equal expression.
SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE (group_by_col IN (3, 9)) OR (aggr_col = 9) GROUP BY group_by_col;
group_by_col MIN(aggr_col) MAX(aggr_col)
NULL 9 9
3 2 6
EXPLAIN SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE (group_by_col IN (3, 9)) OR (aggr_col = 9) GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL index group_by_col_key group_by_col_key 10 NULL 6 44.44 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,min(`test`.`a`.`aggr_col`) AS `MIN(aggr_col)`,max(`test`.`a`.`aggr_col`) AS `MAX(aggr_col)` from `test`.`a` where ((`test`.`a`.`group_by_col` in (3,9)) or (`test`.`a`.`aggr_col` = 9)) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'minmax_keypart_in_disjunctive_query' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
# Scenario 4: non aggregate field used as equal expression.
SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE (group_by_col = 3) OR (aggr_col > 8) GROUP BY group_by_col;
group_by_col MIN(aggr_col) MAX(aggr_col)
NULL 9 9
3 2 6
6 10 10
EXPLAIN SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE (group_by_col = 3) OR (aggr_col > 8) GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL index group_by_col_key group_by_col_key 10 NULL 6 55.55 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,min(`test`.`a`.`aggr_col`) AS `MIN(aggr_col)`,max(`test`.`a`.`aggr_col`) AS `MAX(aggr_col)` from `test`.`a` where ((`test`.`a`.`group_by_col` = 3) or (`test`.`a`.`aggr_col` > 8)) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'minmax_keypart_in_disjunctive_query' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
# Scenario 5: aggregate field used as non-zero expression.
INSERT INTO a VALUES(0, 3);
INSERT INTO a VALUES(0, 9);
INSERT INTO a VALUES(8, 0);
ANALYZE TABLE a;
Table Op Msg_type Msg_text
test.a analyze status OK
SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE (group_by_col = 9) OR aggr_col GROUP BY group_by_col;
group_by_col MIN(aggr_col) MAX(aggr_col)
NULL 7 9
0 8 8
3 2 6
6 5 10
9 0 0
EXPLAIN SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE group_by_col = 9 OR aggr_col GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL index group_by_col_key group_by_col_key 10 NULL 9 91.11 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,min(`test`.`a`.`aggr_col`) AS `MIN(aggr_col)`,max(`test`.`a`.`aggr_col`) AS `MAX(aggr_col)` from `test`.`a` where ((`test`.`a`.`group_by_col` = 9) or `test`.`a`.`aggr_col`) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'minmax_keypart_in_disjunctive_query' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
# Scenario 6: non aggregate field used as non-zero expression.
SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE group_by_col OR (aggr_col < 9) GROUP BY group_by_col;
group_by_col MIN(aggr_col) MAX(aggr_col)
NULL 7 7
0 8 8
3 0 6
6 5 10
9 0 0
EXPLAIN SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE group_by_col OR (aggr_col < 9) GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL index group_by_col_key group_by_col_key 10 NULL 9 92.59 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,min(`test`.`a`.`aggr_col`) AS `MIN(aggr_col)`,max(`test`.`a`.`aggr_col`) AS `MAX(aggr_col)` from `test`.`a` where (`test`.`a`.`group_by_col` or (`test`.`a`.`aggr_col` < 9)) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'minmax_keypart_in_disjunctive_query' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
# Scenario 7: aggregate field used in equal exp without a CONST
INSERT INTO a VALUES(1,1),(1,2),(2,1);
SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE aggr_col = group_by_col GROUP BY group_by_col;
group_by_col MIN(aggr_col) MAX(aggr_col)
1 1 1
EXPLAIN SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE aggr_col = group_by_col GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL index group_by_col_key group_by_col_key 10 NULL 12 100.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,min(`test`.`a`.`aggr_col`) AS `MIN(aggr_col)`,max(`test`.`a`.`aggr_col`) AS `MAX(aggr_col)` from `test`.`a` where (`test`.`a`.`group_by_col` = `test`.`a`.`aggr_col`) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'minmax_keypart_in_disjunctive_query' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
# Scenario 8: aggregate field used in a non-eq exp without a CONST
SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE aggr_col < group_by_col GROUP BY group_by_col;
group_by_col MIN(aggr_col) MAX(aggr_col)
2 1 1
3 0 2
6 5 5
9 0 0
EXPLAIN SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE aggr_col < group_by_col GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL index group_by_col_key group_by_col_key 10 NULL 12 33.33 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,min(`test`.`a`.`aggr_col`) AS `MIN(aggr_col)`,max(`test`.`a`.`aggr_col`) AS `MAX(aggr_col)` from `test`.`a` where (`test`.`a`.`aggr_col` < `test`.`a`.`group_by_col`) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'minmax_keypart_in_disjunctive_query' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
# Scenario 8
INSERT INTO a VALUES(0,1),(1,0),(0,0);
SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE aggr_col OR group_by_col GROUP BY group_by_col;
group_by_col MIN(aggr_col) MAX(aggr_col)
NULL 7 9
0 1 8
1 0 2
2 1 1
3 0 6
6 5 10
9 0 0
EXPLAIN SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE aggr_col OR group_by_col GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL index group_by_col_key group_by_col_key 10 NULL 15 99.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,min(`test`.`a`.`aggr_col`) AS `MIN(aggr_col)`,max(`test`.`a`.`aggr_col`) AS `MAX(aggr_col)` from `test`.`a` where (`test`.`a`.`aggr_col` or `test`.`a`.`group_by_col`) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'minmax_keypart_in_disjunctive_query' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
# Scenario 9
SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE aggr_col AND group_by_col GROUP BY group_by_col;
group_by_col MIN(aggr_col) MAX(aggr_col)
1 1 2
2 1 1
3 2 6
6 5 10
EXPLAIN SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE aggr_col AND group_by_col GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL index group_by_col_key group_by_col_key 10 NULL 15 81.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,min(`test`.`a`.`aggr_col`) AS `MIN(aggr_col)`,max(`test`.`a`.`aggr_col`) AS `MAX(aggr_col)` from `test`.`a` where (`test`.`a`.`aggr_col` and `test`.`a`.`group_by_col`) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'minmax_keypart_in_disjunctive_query' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
# Scenario 10: Added for completion. This fix does not have an impact.
SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE aggr_col<>0 AND group_by_col<>0 GROUP BY group_by_col;
group_by_col MIN(aggr_col) MAX(aggr_col)
1 1 2
2 1 1
3 2 6
6 5 10
EXPLAIN SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE aggr_col<>0 AND group_by_col<>0 GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL range group_by_col_key group_by_col_key 10 NULL 7 100.00 Using where; Using index for group-by
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,min(`test`.`a`.`aggr_col`) AS `MIN(aggr_col)`,max(`test`.`a`.`aggr_col`) AS `MAX(aggr_col)` from `test`.`a` where ((`test`.`a`.`aggr_col` <> 0) and (`test`.`a`.`group_by_col` <> 0)) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'minmax_keypart_in_disjunctive_query' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
0
# Scenario 11: ITEM_FUNC as an argument of ITEM_FUNC
SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE group_by_col OR (group_by_col < (aggr_col = 1)) GROUP BY group_by_col;
group_by_col MIN(aggr_col) MAX(aggr_col)
0 1 1
1 0 2
2 1 1
3 0 6
6 5 10
9 0 0
EXPLAIN SELECT group_by_col, MIN(aggr_col), MAX(aggr_col) FROM a
WHERE group_by_col OR (group_by_col < (aggr_col = 1)) GROUP BY group_by_col;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE a NULL index group_by_col_key group_by_col_key 10 NULL 15 93.33 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`a`.`group_by_col` AS `group_by_col`,min(`test`.`a`.`aggr_col`) AS `MIN(aggr_col)`,max(`test`.`a`.`aggr_col`) AS `MAX(aggr_col)` from `test`.`a` where (`test`.`a`.`group_by_col` or (`test`.`a`.`group_by_col` < (`test`.`a`.`aggr_col` = 1))) group by `test`.`a`.`group_by_col`
SELECT TRACE RLIKE 'minmax_keypart_in_disjunctive_query' AS OK
FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
OK
1
SET optimizer_trace_max_mem_size=DEFAULT;
SET optimizer_trace=DEFAULT;
SET end_markers_in_json=DEFAULT;
DROP TABLE a;
# End of test for Bug#24423143