mirror of
https://github.com/MariaDB/server.git
synced 2025-10-30 04:26:45 +03:00
638 lines
20 KiB
Plaintext
638 lines
20 KiB
Plaintext
drop table if exists t0, t1, t2, t3;
|
|
set @myisam_mrr_tmp=@@optimizer_switch;
|
|
set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
|
|
set @mrr_buffer_size_save= @@mrr_buffer_size;
|
|
set mrr_buffer_size=79;
|
|
Warnings:
|
|
Warning 1292 Truncated incorrect mrr_buffer_size value: '79'
|
|
create table t1(a int);
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) DEFAULT NULL
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t2(a int);
|
|
insert into t2 select A.a + 10*(B.a + 10*C.a) from t1 A, t1 B, t1 C;
|
|
create table t3 (
|
|
a char(8) not null, b char(8) not null, filler char(200),
|
|
key(a)
|
|
);
|
|
insert into t3 select @a:=concat('c-', 1000+ A.a, '=w'), @a, 'filler' from t2 A;
|
|
insert into t3 select concat('c-', 1000+A.a, '=w'), concat('c-', 2000+A.a, '=w'),
|
|
'filler-1' from t2 A;
|
|
insert into t3 select concat('c-', 1000+A.a, '=w'), concat('c-', 3000+A.a, '=w'),
|
|
'filler-2' from t2 A;
|
|
select a,filler from t3 where a >= 'c-9011=w';
|
|
a filler
|
|
select a,filler from t3 where a >= 'c-1011=w' and a <= 'c-1015=w';
|
|
a filler
|
|
c-1011=w filler
|
|
c-1012=w filler
|
|
c-1013=w filler
|
|
c-1014=w filler
|
|
c-1015=w filler
|
|
c-1011=w filler-1
|
|
c-1012=w filler-1
|
|
c-1013=w filler-1
|
|
c-1014=w filler-1
|
|
c-1015=w filler-1
|
|
c-1011=w filler-2
|
|
c-1012=w filler-2
|
|
c-1013=w filler-2
|
|
c-1014=w filler-2
|
|
c-1015=w filler-2
|
|
select a,filler from t3 where (a>='c-1011=w' and a <= 'c-1013=w') or
|
|
(a>='c-1014=w' and a <= 'c-1015=w');
|
|
a filler
|
|
c-1011=w filler
|
|
c-1012=w filler
|
|
c-1013=w filler
|
|
c-1014=w filler
|
|
c-1015=w filler
|
|
c-1011=w filler-1
|
|
c-1012=w filler-1
|
|
c-1013=w filler-1
|
|
c-1014=w filler-1
|
|
c-1015=w filler-1
|
|
c-1011=w filler-2
|
|
c-1012=w filler-2
|
|
c-1013=w filler-2
|
|
c-1014=w filler-2
|
|
c-1015=w filler-2
|
|
insert into t3 values ('c-1013=z', 'c-1013=z', 'err');
|
|
insert into t3 values ('a-1014=w', 'a-1014=w', 'err');
|
|
select a,filler from t3 where (a>='c-1011=w' and a <= 'c-1013=w') or
|
|
(a>='c-1014=w' and a <= 'c-1015=w');
|
|
a filler
|
|
c-1011=w filler
|
|
c-1012=w filler
|
|
c-1013=w filler
|
|
c-1014=w filler
|
|
c-1015=w filler
|
|
c-1011=w filler-1
|
|
c-1012=w filler-1
|
|
c-1013=w filler-1
|
|
c-1014=w filler-1
|
|
c-1015=w filler-1
|
|
c-1011=w filler-2
|
|
c-1012=w filler-2
|
|
c-1013=w filler-2
|
|
c-1014=w filler-2
|
|
c-1015=w filler-2
|
|
delete from t3 where b in ('c-1013=z', 'a-1014=w');
|
|
select a,filler from t3 where a='c-1011=w' or a='c-1012=w' or a='c-1013=w' or
|
|
a='c-1014=w' or a='c-1015=w';
|
|
a filler
|
|
c-1011=w filler
|
|
c-1012=w filler
|
|
c-1013=w filler
|
|
c-1014=w filler
|
|
c-1015=w filler
|
|
c-1011=w filler-1
|
|
c-1012=w filler-1
|
|
c-1013=w filler-1
|
|
c-1014=w filler-1
|
|
c-1015=w filler-1
|
|
c-1011=w filler-2
|
|
c-1012=w filler-2
|
|
c-1013=w filler-2
|
|
c-1014=w filler-2
|
|
c-1015=w filler-2
|
|
insert into t3 values ('c-1013=w', 'del-me', 'inserted');
|
|
select a,filler from t3 where a='c-1011=w' or a='c-1012=w' or a='c-1013=w' or
|
|
a='c-1014=w' or a='c-1015=w';
|
|
a filler
|
|
c-1011=w filler
|
|
c-1012=w filler
|
|
c-1013=w filler
|
|
c-1014=w filler
|
|
c-1015=w filler
|
|
c-1011=w filler-1
|
|
c-1012=w filler-1
|
|
c-1013=w filler-1
|
|
c-1014=w filler-1
|
|
c-1015=w filler-1
|
|
c-1011=w filler-2
|
|
c-1012=w filler-2
|
|
c-1013=w filler-2
|
|
c-1014=w filler-2
|
|
c-1015=w filler-2
|
|
c-1013=w inserted
|
|
delete from t3 where b='del-me';
|
|
alter table t3 add primary key(b);
|
|
select b,filler from t3 where (b>='c-1011=w' and b<= 'c-1018=w') or
|
|
b IN ('c-1019=w', 'c-1020=w', 'c-1021=w',
|
|
'c-1022=w', 'c-1023=w', 'c-1024=w');
|
|
b filler
|
|
c-1011=w filler
|
|
c-1012=w filler
|
|
c-1013=w filler
|
|
c-1014=w filler
|
|
c-1015=w filler
|
|
c-1016=w filler
|
|
c-1017=w filler
|
|
c-1018=w filler
|
|
c-1019=w filler
|
|
c-1020=w filler
|
|
c-1021=w filler
|
|
c-1022=w filler
|
|
c-1023=w filler
|
|
c-1024=w filler
|
|
select b,filler from t3 where (b>='c-1011=w' and b<= 'c-1020=w') or
|
|
b IN ('c-1021=w', 'c-1022=w', 'c-1023=w');
|
|
b filler
|
|
c-1011=w filler
|
|
c-1012=w filler
|
|
c-1013=w filler
|
|
c-1014=w filler
|
|
c-1015=w filler
|
|
c-1016=w filler
|
|
c-1017=w filler
|
|
c-1018=w filler
|
|
c-1019=w filler
|
|
c-1020=w filler
|
|
c-1021=w filler
|
|
c-1022=w filler
|
|
c-1023=w filler
|
|
select b,filler from t3 where (b>='c-1011=w' and b<= 'c-1018=w') or
|
|
b IN ('c-1019=w', 'c-1020=w') or
|
|
(b>='c-1021=w' and b<= 'c-1023=w');
|
|
b filler
|
|
c-1011=w filler
|
|
c-1012=w filler
|
|
c-1013=w filler
|
|
c-1014=w filler
|
|
c-1015=w filler
|
|
c-1016=w filler
|
|
c-1017=w filler
|
|
c-1018=w filler
|
|
c-1019=w filler
|
|
c-1020=w filler
|
|
c-1021=w filler
|
|
c-1022=w filler
|
|
c-1023=w filler
|
|
drop table if exists t4;
|
|
create table t4 (a varchar(10), b int, c char(10), filler char(200),
|
|
key idx1 (a, b, c));
|
|
insert into t4 (filler) select concat('NULL-', 15-a) from t2 order by a limit 15;
|
|
insert into t4 (a,b,c,filler)
|
|
select 'b-1',NULL,'c-1', concat('NULL-', 15-a) from t2 order by a limit 15;
|
|
insert into t4 (a,b,c,filler)
|
|
select 'b-1',NULL,'c-222', concat('NULL-', 15-a) from t2 order by a limit 15;
|
|
insert into t4 (a,b,c,filler)
|
|
select 'bb-1',NULL,'cc-2', concat('NULL-', 15-a) from t2 order by a limit 15;
|
|
insert into t4 (a,b,c,filler)
|
|
select 'zz-1',NULL,'cc-2', 'filler-data' from t2 order by a limit 500;
|
|
explain
|
|
select * from t4 where a IS NULL and b IS NULL and (c IS NULL or c='no-such-row1'
|
|
or c='no-such-row2');
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t4 range idx1 idx1 29 NULL 10 Using index condition; Using where; Rowid-ordered scan
|
|
select * from t4 where a IS NULL and b IS NULL and (c IS NULL or c='no-such-row1'
|
|
or c='no-such-row2');
|
|
a b c filler
|
|
NULL NULL NULL NULL-15
|
|
NULL NULL NULL NULL-14
|
|
NULL NULL NULL NULL-13
|
|
NULL NULL NULL NULL-12
|
|
NULL NULL NULL NULL-11
|
|
NULL NULL NULL NULL-10
|
|
NULL NULL NULL NULL-9
|
|
NULL NULL NULL NULL-8
|
|
NULL NULL NULL NULL-7
|
|
NULL NULL NULL NULL-6
|
|
NULL NULL NULL NULL-5
|
|
NULL NULL NULL NULL-4
|
|
NULL NULL NULL NULL-3
|
|
NULL NULL NULL NULL-2
|
|
NULL NULL NULL NULL-1
|
|
explain
|
|
select * from t4 where (a ='b-1' or a='bb-1') and b IS NULL and (c='c-1' or c='cc-2');
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t4 range idx1 idx1 29 NULL 21 Using index condition; Using where; Rowid-ordered scan
|
|
select * from t4 where (a ='b-1' or a='bb-1') and b IS NULL and (c='c-1' or c='cc-2');
|
|
a b c filler
|
|
b-1 NULL c-1 NULL-15
|
|
b-1 NULL c-1 NULL-14
|
|
b-1 NULL c-1 NULL-13
|
|
b-1 NULL c-1 NULL-12
|
|
b-1 NULL c-1 NULL-11
|
|
b-1 NULL c-1 NULL-10
|
|
b-1 NULL c-1 NULL-9
|
|
b-1 NULL c-1 NULL-8
|
|
b-1 NULL c-1 NULL-7
|
|
b-1 NULL c-1 NULL-6
|
|
b-1 NULL c-1 NULL-5
|
|
b-1 NULL c-1 NULL-4
|
|
b-1 NULL c-1 NULL-3
|
|
b-1 NULL c-1 NULL-2
|
|
b-1 NULL c-1 NULL-1
|
|
bb-1 NULL cc-2 NULL-15
|
|
bb-1 NULL cc-2 NULL-14
|
|
bb-1 NULL cc-2 NULL-13
|
|
bb-1 NULL cc-2 NULL-12
|
|
bb-1 NULL cc-2 NULL-11
|
|
bb-1 NULL cc-2 NULL-10
|
|
bb-1 NULL cc-2 NULL-9
|
|
bb-1 NULL cc-2 NULL-8
|
|
bb-1 NULL cc-2 NULL-7
|
|
bb-1 NULL cc-2 NULL-6
|
|
bb-1 NULL cc-2 NULL-5
|
|
bb-1 NULL cc-2 NULL-4
|
|
bb-1 NULL cc-2 NULL-3
|
|
bb-1 NULL cc-2 NULL-2
|
|
bb-1 NULL cc-2 NULL-1
|
|
select * from t4 ignore index(idx1) where (a ='b-1' or a='bb-1') and b IS NULL and (c='c-1' or c='cc-2');
|
|
a b c filler
|
|
b-1 NULL c-1 NULL-15
|
|
b-1 NULL c-1 NULL-14
|
|
b-1 NULL c-1 NULL-13
|
|
b-1 NULL c-1 NULL-12
|
|
b-1 NULL c-1 NULL-11
|
|
b-1 NULL c-1 NULL-10
|
|
b-1 NULL c-1 NULL-9
|
|
b-1 NULL c-1 NULL-8
|
|
b-1 NULL c-1 NULL-7
|
|
b-1 NULL c-1 NULL-6
|
|
b-1 NULL c-1 NULL-5
|
|
b-1 NULL c-1 NULL-4
|
|
b-1 NULL c-1 NULL-3
|
|
b-1 NULL c-1 NULL-2
|
|
b-1 NULL c-1 NULL-1
|
|
bb-1 NULL cc-2 NULL-15
|
|
bb-1 NULL cc-2 NULL-14
|
|
bb-1 NULL cc-2 NULL-13
|
|
bb-1 NULL cc-2 NULL-12
|
|
bb-1 NULL cc-2 NULL-11
|
|
bb-1 NULL cc-2 NULL-10
|
|
bb-1 NULL cc-2 NULL-9
|
|
bb-1 NULL cc-2 NULL-8
|
|
bb-1 NULL cc-2 NULL-7
|
|
bb-1 NULL cc-2 NULL-6
|
|
bb-1 NULL cc-2 NULL-5
|
|
bb-1 NULL cc-2 NULL-4
|
|
bb-1 NULL cc-2 NULL-3
|
|
bb-1 NULL cc-2 NULL-2
|
|
bb-1 NULL cc-2 NULL-1
|
|
drop table t1, t2, t3, t4;
|
|
create table t1 (a int, b int not null,unique key (a,b),index(b));
|
|
insert ignore into t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(null,7),(9,9),(8,8),(7,7),(null,9),(null,9),(6,6);
|
|
create table t2 like t1;
|
|
insert into t2 select * from t1;
|
|
alter table t1 modify b blob not null, add c int not null, drop key a, add unique key (a,b(20),c), drop key b, add key (b(10));
|
|
select * from t1 where a is null;
|
|
a b c
|
|
NULL 7 0
|
|
NULL 9 0
|
|
NULL 9 0
|
|
select * from t1 where (a is null or a > 0 and a < 3) and b > 7 limit 3;
|
|
a b c
|
|
NULL 9 0
|
|
NULL 9 0
|
|
select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
|
|
a b c
|
|
NULL 7 0
|
|
NULL 9 0
|
|
NULL 9 0
|
|
drop table t1, t2;
|
|
set @@mrr_buffer_size= @mrr_buffer_size_save;
|
|
CREATE TABLE t1 (
|
|
ID int(10) unsigned NOT NULL AUTO_INCREMENT,
|
|
col1 int(10) unsigned DEFAULT NULL,
|
|
key1 int(10) unsigned NOT NULL DEFAULT '0',
|
|
key2 int(10) unsigned DEFAULT NULL,
|
|
text1 text,
|
|
text2 text,
|
|
col2 smallint(6) DEFAULT '100',
|
|
col3 enum('headers','bodyandsubject') NOT NULL DEFAULT 'bodyandsubject',
|
|
col4 tinyint(3) unsigned NOT NULL DEFAULT '0',
|
|
PRIMARY KEY (ID),
|
|
KEY (key1),
|
|
KEY (key2)
|
|
) ENGINE=MyISAM AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;
|
|
INSERT INTO t1 VALUES
|
|
(1,NULL,1130,NULL,'Hello',NULL,100,'bodyandsubject',0),
|
|
(2,NULL,1130,NULL,'bye',NULL,100,'bodyandsubject',0),
|
|
(3,NULL,1130,NULL,'red',NULL,100,'bodyandsubject',0),
|
|
(4,NULL,1130,NULL,'yellow',NULL,100,'bodyandsubject',0),
|
|
(5,NULL,1130,NULL,'blue',NULL,100,'bodyandsubject',0);
|
|
select * FROM t1 WHERE key1=1130 AND col1 IS NULL ORDER BY text1;
|
|
ID col1 key1 key2 text1 text2 col2 col3 col4
|
|
5 NULL 1130 NULL blue NULL 100 bodyandsubject 0
|
|
2 NULL 1130 NULL bye NULL 100 bodyandsubject 0
|
|
1 NULL 1130 NULL Hello NULL 100 bodyandsubject 0
|
|
3 NULL 1130 NULL red NULL 100 bodyandsubject 0
|
|
4 NULL 1130 NULL yellow NULL 100 bodyandsubject 0
|
|
drop table t1;
|
|
|
|
BUG#37851: Crash in test_if_skip_sort_order tab->select is zero
|
|
|
|
CREATE TABLE t1 (
|
|
pk int(11) NOT NULL AUTO_INCREMENT,
|
|
PRIMARY KEY (pk)
|
|
);
|
|
INSERT INTO t1 VALUES (1);
|
|
CREATE TABLE t2 (
|
|
pk int(11) NOT NULL AUTO_INCREMENT,
|
|
int_key int(11) DEFAULT NULL,
|
|
PRIMARY KEY (pk),
|
|
KEY int_key (int_key)
|
|
);
|
|
INSERT INTO t2 VALUES (1,1),(2,6),(3,0);
|
|
EXPLAIN EXTENDED
|
|
SELECT MIN(t1.pk)
|
|
FROM t1 WHERE EXISTS (
|
|
SELECT t2.pk
|
|
FROM t2
|
|
WHERE t2.int_key IS NULL
|
|
GROUP BY t2.pk
|
|
);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00
|
|
2 SUBQUERY t2 ref int_key int_key 5 const 1 100.00 Using index condition
|
|
Warnings:
|
|
Note 1003 select min(1) AS `MIN(t1.pk)` from dual where exists(select `test`.`t2`.`pk` from `test`.`t2` where isnull(`test`.`t2`.`int_key`))
|
|
DROP TABLE t1, t2;
|
|
#
|
|
# BUG#42048 Discrepancy between MyISAM and Maria's ICP implementation
|
|
#
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1 (a int, b char(20), filler char(200), key(a,b(10)));
|
|
insert into t1 select A.a + 10*(B.a + 10*C.a), 'bbb','filler' from t0 A, t0 B, t0 C;
|
|
update t1 set b=repeat(char(65+a), 20) where a < 25;
|
|
This must show range + using index condition:
|
|
explain select * from t1 where a < 10 and b = repeat(char(65+a), 20);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range a a 5 NULL 19 Using index condition; Using where
|
|
select * from t1 where a < 10 and b = repeat(char(65+a), 20);
|
|
a b filler
|
|
0 AAAAAAAAAAAAAAAAAAAA filler
|
|
1 BBBBBBBBBBBBBBBBBBBB filler
|
|
2 CCCCCCCCCCCCCCCCCCCC filler
|
|
3 DDDDDDDDDDDDDDDDDDDD filler
|
|
4 EEEEEEEEEEEEEEEEEEEE filler
|
|
5 FFFFFFFFFFFFFFFFFFFF filler
|
|
6 GGGGGGGGGGGGGGGGGGGG filler
|
|
7 HHHHHHHHHHHHHHHHHHHH filler
|
|
8 IIIIIIIIIIIIIIIIIIII filler
|
|
9 JJJJJJJJJJJJJJJJJJJJ filler
|
|
drop table t0,t1;
|
|
#
|
|
# BUG#41136: ORDER BY + range access: EXPLAIN shows "Using MRR" while MRR is actually not used
|
|
#
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1 (a int, b int, key(a));
|
|
insert into t1 select A.a + 10 *(B.a + 10*C.a), A.a + 10 *(B.a + 10*C.a) from t0 A, t0 B, t0 C;
|
|
This mustn't show "Using MRR":
|
|
explain select * from t1 where a < 20 order by a;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range a a 5 NULL 20 Using index condition
|
|
drop table t0, t1;
|
|
#
|
|
# Part of MWL#67: DS-MRR backport: add an @@optimizer_switch flag for
|
|
# index_condition pushdown:
|
|
# - engine_condition_pushdown does not affect ICP
|
|
select @@optimizer_switch like '%index_condition_pushdown=on%';
|
|
@@optimizer_switch like '%index_condition_pushdown=on%'
|
|
1
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1 (a int, b int, key(a));
|
|
insert into t1 select A.a + 10 *(B.a + 10*C.a), A.a + 10 *(B.a + 10*C.a) from t0 A, t0 B, t0 C;
|
|
A query that will use ICP:
|
|
explain select * from t1 where a < 20;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range a a 5 NULL 20 Using index condition; Rowid-ordered scan
|
|
set @save_optimizer_switch=@@optimizer_switch;
|
|
set optimizer_switch='index_condition_pushdown=off';
|
|
explain select * from t1 where a < 20;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range a a 5 NULL 20 Using where; Rowid-ordered scan
|
|
set optimizer_switch='index_condition_pushdown=on';
|
|
explain select * from t1 where a < 20;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range a a 5 NULL 20 Using index condition; Rowid-ordered scan
|
|
set optimizer_switch=@save_optimizer_switch;
|
|
#
|
|
# BUG#629684: Unreachable code in multi_range_read.cc in maria-5.3-dsmrr-cpk
|
|
#
|
|
delete from t0 where a > 2;
|
|
insert into t0 values (NULL),(NULL);
|
|
insert into t1 values (NULL, 1234), (NULL, 5678);
|
|
set @save_join_cache_level=@@join_cache_level;
|
|
set @@join_cache_level=6;
|
|
explain
|
|
select * from t0, t1 where t0.a<=>t1.a;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t0 ALL NULL NULL NULL NULL 5
|
|
1 SIMPLE t1 ref a a 5 test.t0.a 1 Using index condition(BKA); Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
select * from t0, t1 where t0.a<=>t1.a;
|
|
a a b
|
|
0 0 0
|
|
1 1 1
|
|
2 2 2
|
|
NULL NULL 1234
|
|
NULL NULL 1234
|
|
NULL NULL 5678
|
|
NULL NULL 5678
|
|
set @@join_cache_level=@save_join_cache_level;
|
|
drop table t0, t1;
|
|
#
|
|
# BUG#625841: Assertion `!table || (!table->read_set || bitmap_is_set
|
|
# (table->read_set, field_index))' on REPLACE ... SELECT with MRR
|
|
#
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1 (
|
|
key1 varchar(10),
|
|
col1 char(255), col2 char(255),
|
|
col3 char(244), col4 char(255),
|
|
key(key1)
|
|
);
|
|
create table t2 like t1;
|
|
insert into t1
|
|
select
|
|
1000+A.a+100*B.a + 10*C.a,
|
|
'col1val', 'col2val',
|
|
'col3val', 'col4val'
|
|
from t0 A, t0 B, t0 C;
|
|
REPLACE INTO t2(col2,col3,col4)
|
|
SELECT col2,col3,col4
|
|
FROM t1
|
|
WHERE `key1` LIKE CONCAT( LEFT( '1' , 7 ) , '%' )
|
|
ORDER BY col1 LIMIT 7;
|
|
drop table t0, t1, t2;
|
|
#
|
|
# BUG#670417: Diverging results in maria-5.3-mwl128-dsmrr-cpk with join buffer (incremental, BKA join)
|
|
#
|
|
set @save_join_cache_level = @@join_cache_level;
|
|
set join_cache_level = 6;
|
|
set @save_join_buffer_size=@@join_buffer_size;
|
|
set join_buffer_size = 136;
|
|
CREATE TABLE t1 (
|
|
pk int(11) NOT NULL AUTO_INCREMENT,
|
|
col_int_key int(11) NOT NULL,
|
|
col_varchar_key varchar(1) NOT NULL,
|
|
col_varchar_nokey varchar(1) NOT NULL,
|
|
PRIMARY KEY (pk),
|
|
KEY col_varchar_key (col_varchar_key,col_int_key)
|
|
);
|
|
INSERT INTO t1 VALUES
|
|
(10,8,'v','v'),(11,8,'f','f'), (12,5,'v','v'),
|
|
(13,8,'s','s'),(14,8,'a','a'),(15,6,'p','p'),
|
|
(16,7,'z','z'),(17,2,'a','a'),(18,5,'h','h'),
|
|
(19,7,'h','h'),(20,2,'v','v'),(21,9,'v','v'),
|
|
(22,142,'b','b'),(23,3,'y','y'),(24,0,'v','v'),
|
|
(25,3,'m','m'),(26,5,'z','z'),(27,9,'n','n'),
|
|
(28,1,'d','d'),(29,107,'a','a');
|
|
INSERT INTO t1 VALUES
|
|
(110,8,'v','v'),(111,8,'f','f'), (112,5,'v','v'),
|
|
(113,8,'s','s'),(114,8,'a','a'),(115,6,'p','p'),
|
|
(116,7,'z','z'),(117,2,'a','a'),(118,5,'h','h'),
|
|
(119,7,'h','h'),(120,2,'v','v'),(121,9,'v','v'),
|
|
(122,142,'b','b'),(123,3,'y','y'),(124,0,'v','v'),
|
|
(125,3,'m','m'),(126,5,'z','z'),(127,9,'n','n'),
|
|
(128,1,'d','d'),(129,107,'a','a');
|
|
SELECT COUNT(*)
|
|
FROM
|
|
t1 AS table2, t1 AS table3
|
|
where
|
|
table3.col_varchar_key = table2.col_varchar_key AND
|
|
table3.col_varchar_key = table2.col_varchar_nokey AND
|
|
table3.pk<>0;
|
|
COUNT(*)
|
|
200
|
|
EXPLAIN SELECT COUNT(*)
|
|
FROM
|
|
t1 AS table2, t1 AS table3
|
|
where
|
|
table3.col_varchar_key = table2.col_varchar_key AND
|
|
table3.col_varchar_key = table2.col_varchar_nokey AND
|
|
table3.pk<>0;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE table2 ALL col_varchar_key NULL NULL NULL 40 Using where
|
|
1 SIMPLE table3 ref PRIMARY,col_varchar_key col_varchar_key 3 test.table2.col_varchar_key 5 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
set join_cache_level= @save_join_cache_level;
|
|
set join_buffer_size= @save_join_buffer_size;
|
|
drop table t1;
|
|
#
|
|
# BUG#730133: Wrong result with jkl = 7, BKA, ICP in maria-5.3 + compound index
|
|
#
|
|
set @tmp_730133_jcl= @@join_cache_level;
|
|
set join_cache_level = 7;
|
|
set @tmp_730133_os= @@optimizer_switch;
|
|
set optimizer_switch= 'join_cache_hashed=off,join_cache_bka=on,index_condition_pushdown=on,optimize_join_buffer_size=on';
|
|
CREATE TABLE t1 (f1 int, f2 int, f3 int, f4 int, f5 int, KEY (f4,f3));
|
|
INSERT IGNORE INTO t1 VALUES ('2','9','5','0','0'),('4','7','0','0','0'),
|
|
('6','97','190','0','0'),('7','3','6','0','0'),('11','101','186','0','0'),
|
|
('14','194','226','0','0'),('15','148','133','0','0'),
|
|
('16','9','6','0','0'),('17','9','3','0','0'),('18','1','8','0','0'),
|
|
('19','1','5','0','0'),('20','5','7','0','0');
|
|
explain
|
|
SELECT COUNT(alias2.f2)
|
|
FROM
|
|
t1 STRAIGHT_JOIN
|
|
t1 AS alias3 STRAIGHT_JOIN
|
|
t1 AS alias2 FORCE KEY (f4)
|
|
WHERE
|
|
alias2.f4=alias3.f5 AND
|
|
alias2.f3 > alias3.f1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 index NULL f4 10 NULL 12 Using index
|
|
1 SIMPLE alias3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
|
1 SIMPLE alias2 ref f4 f4 5 test.alias3.f5 2 Using index condition(BKA); Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
|
SELECT COUNT(alias2.f2)
|
|
FROM
|
|
t1 STRAIGHT_JOIN
|
|
t1 AS alias3 STRAIGHT_JOIN
|
|
t1 AS alias2 FORCE KEY (f4)
|
|
WHERE
|
|
alias2.f4=alias3.f5 AND
|
|
alias2.f3 > alias3.f1;
|
|
COUNT(alias2.f2)
|
|
768
|
|
set @@join_cache_level= @tmp_730133_jcl;
|
|
set @@optimizer_switch= @tmp_730133_os;
|
|
drop table t1;
|
|
#
|
|
# Test of MRR handler counters
|
|
#
|
|
flush status;
|
|
show status like 'Handler_mrr%';
|
|
Variable_name Value
|
|
Handler_mrr_init 0
|
|
Handler_mrr_key_refills 0
|
|
Handler_mrr_rowid_refills 0
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1 (a int, b int, filler char(200), key(a));
|
|
insert into t1
|
|
select A.a+10*B.a+100*C.a+1000*D.a, 123,'filler' from t0 A, t0 B, t0 C, t0 D;
|
|
explain select sum(b) from t1 where a < 10;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range a a 5 NULL 8 Using index condition; Rowid-ordered scan
|
|
# This should show one MRR scan and no re-fills:
|
|
flush status;
|
|
select sum(b) from t1 where a < 10;
|
|
sum(b)
|
|
1230
|
|
show status like 'handler_mrr%';
|
|
Variable_name Value
|
|
Handler_mrr_init 1
|
|
Handler_mrr_key_refills 0
|
|
Handler_mrr_rowid_refills 0
|
|
set @mrr_buffer_size_save= @@mrr_buffer_size;
|
|
set mrr_buffer_size=128;
|
|
explain select sum(b) from t1 where a < 1600;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range a a 5 NULL 1380 Using index condition; Rowid-ordered scan
|
|
# This should show one MRR scan and one extra rowid sort:
|
|
flush status;
|
|
select sum(b) from t1 where a < 1600;
|
|
sum(b)
|
|
196800
|
|
show status like 'handler_mrr%';
|
|
Variable_name Value
|
|
Handler_mrr_init 1
|
|
Handler_mrr_key_refills 0
|
|
Handler_mrr_rowid_refills 1
|
|
set @@mrr_buffer_size= @mrr_buffer_size_save;
|
|
#Now, let's check BKA:
|
|
set @join_cache_level_save= @@join_cache_level;
|
|
set @join_buffer_size_save= @@join_buffer_size;
|
|
set join_cache_level=6;
|
|
explain select sum(t1.b) from t0,t1 where t0.a=t1.a;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
|
|
1 SIMPLE t1 ref a a 5 test.t0.a 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
flush status;
|
|
select sum(t1.b) from t0,t1 where t0.a=t1.a;
|
|
sum(t1.b)
|
|
1230
|
|
show status like 'handler_mrr%';
|
|
Variable_name Value
|
|
Handler_mrr_init 1
|
|
Handler_mrr_key_refills 0
|
|
Handler_mrr_rowid_refills 0
|
|
set join_buffer_size=10;
|
|
explain select sum(t1.b) from t0,t1 where t0.a=t1.a;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
|
|
1 SIMPLE t1 ref a a 5 test.t0.a 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
flush status;
|
|
select sum(t1.b) from t0,t1 where t0.a=t1.a;
|
|
sum(t1.b)
|
|
1230
|
|
show status like 'handler_mrr%';
|
|
Variable_name Value
|
|
Handler_mrr_init ok
|
|
Handler_mrr_key_refills ok
|
|
Handler_mrr_rowid_refills ok
|
|
set join_cache_level= @join_cache_level_save;
|
|
set join_buffer_size= @join_buffer_size_save;
|
|
drop table t0, t1;
|
|
set optimizer_switch= @myisam_mrr_tmp;
|