mirror of
https://github.com/MariaDB/server.git
synced 2025-09-02 09:41:40 +03:00
Backport into MariaDB-5.2 the following:
WL#2474 "Multi Range Read: Change the default MRR implementation to implement new MRR interface"
WL#2475 "Batched range read functions for MyISAM/InnoDb"
"Index condition pushdown for MyISAM/InnoDB"
Igor's fix from sp1r-igor@olga.mysql.com-20080330055902-07614:
There could be observed the following problems:
1. EXPLAIN did not mention pushdown conditions from on expressions in the
'extra' column. As a result if a query had no where conditions pushed
down to a table, but had on conditions pushed to this table the 'extra'
column in the EXPLAIN for the table missed 'using where'.
2. Conditions for ref access were not eliminated from on expressions
though such conditions were eliminated from the where condition.
This commit is contained in:
Sergey Petrunya
404
mysql-test/r/innodb_mrr.result
Normal file
404
mysql-test/r/innodb_mrr.result
Normal file
@@ -0,0 +1,404 @@
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drop table if exists t1,t2,t3,t4;
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set @save_storage_engine= @@storage_engine;
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set storage_engine=InnoDB;
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create table t1(a int);
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) DEFAULT NULL
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) ENGINE=InnoDB DEFAULT CHARSET=latin1
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insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t2(a int);
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insert into t2 select A.a + 10*(B.a + 10*C.a) from t1 A, t1 B, t1 C;
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create table t3 (
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a char(8) not null, b char(8) not null, filler char(200),
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key(a)
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);
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insert into t3 select @a:=concat('c-', 1000+ A.a, '=w'), @a, 'filler' from t2 A;
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insert into t3 select concat('c-', 1000+A.a, '=w'), concat('c-', 2000+A.a, '=w'),
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'filler-1' from t2 A;
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insert into t3 select concat('c-', 1000+A.a, '=w'), concat('c-', 3000+A.a, '=w'),
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'filler-2' from t2 A;
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select a,filler from t3 where a >= 'c-9011=w';
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a filler
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select a,filler from t3 where a >= 'c-1011=w' and a <= 'c-1015=w';
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a filler
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c-1011=w filler
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c-1012=w filler
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c-1013=w filler
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c-1014=w filler
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c-1015=w filler
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c-1011=w filler-1
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c-1012=w filler-1
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c-1013=w filler-1
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c-1014=w filler-1
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c-1015=w filler-1
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c-1011=w filler-2
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c-1012=w filler-2
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c-1013=w filler-2
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c-1014=w filler-2
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c-1015=w filler-2
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select a,filler from t3 where (a>='c-1011=w' and a <= 'c-1013=w') or
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(a>='c-1014=w' and a <= 'c-1015=w');
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a filler
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c-1011=w filler
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c-1012=w filler
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c-1013=w filler
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c-1014=w filler
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c-1015=w filler
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c-1011=w filler-1
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c-1012=w filler-1
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c-1013=w filler-1
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c-1014=w filler-1
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c-1015=w filler-1
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c-1011=w filler-2
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c-1012=w filler-2
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c-1013=w filler-2
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c-1014=w filler-2
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c-1015=w filler-2
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insert into t3 values ('c-1013=z', 'c-1013=z', 'err');
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insert into t3 values ('a-1014=w', 'a-1014=w', 'err');
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select a,filler from t3 where (a>='c-1011=w' and a <= 'c-1013=w') or
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(a>='c-1014=w' and a <= 'c-1015=w');
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a filler
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c-1011=w filler
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c-1012=w filler
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c-1013=w filler
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c-1014=w filler
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c-1015=w filler
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c-1011=w filler-1
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c-1012=w filler-1
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c-1013=w filler-1
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c-1014=w filler-1
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c-1015=w filler-1
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c-1011=w filler-2
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c-1012=w filler-2
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c-1013=w filler-2
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c-1014=w filler-2
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c-1015=w filler-2
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delete from t3 where b in ('c-1013=z', 'a-1014=w');
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select a,filler from t3 where a='c-1011=w' or a='c-1012=w' or a='c-1013=w' or
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a='c-1014=w' or a='c-1015=w';
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a filler
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c-1011=w filler
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c-1012=w filler
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c-1013=w filler
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c-1014=w filler
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c-1015=w filler
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c-1011=w filler-1
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c-1012=w filler-1
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c-1013=w filler-1
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c-1014=w filler-1
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c-1015=w filler-1
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c-1011=w filler-2
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c-1012=w filler-2
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c-1013=w filler-2
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c-1014=w filler-2
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c-1015=w filler-2
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insert into t3 values ('c-1013=w', 'del-me', 'inserted');
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select a,filler from t3 where a='c-1011=w' or a='c-1012=w' or a='c-1013=w' or
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a='c-1014=w' or a='c-1015=w';
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a filler
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c-1011=w filler
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c-1012=w filler
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c-1013=w filler
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c-1014=w filler
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c-1015=w filler
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c-1011=w filler-1
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c-1012=w filler-1
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c-1013=w filler-1
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c-1014=w filler-1
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c-1015=w filler-1
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c-1011=w filler-2
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c-1012=w filler-2
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c-1013=w filler-2
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c-1014=w filler-2
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c-1015=w filler-2
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c-1013=w inserted
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delete from t3 where b='del-me';
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alter table t3 add primary key(b);
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select b,filler from t3 where (b>='c-1011=w' and b<= 'c-1018=w') or
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b IN ('c-1019=w', 'c-1020=w', 'c-1021=w',
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'c-1022=w', 'c-1023=w', 'c-1024=w');
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b filler
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c-1011=w filler
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c-1012=w filler
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c-1013=w filler
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c-1014=w filler
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c-1015=w filler
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c-1016=w filler
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c-1017=w filler
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c-1018=w filler
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c-1019=w filler
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c-1020=w filler
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c-1021=w filler
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c-1022=w filler
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c-1023=w filler
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c-1024=w filler
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select b,filler from t3 where (b>='c-1011=w' and b<= 'c-1020=w') or
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b IN ('c-1021=w', 'c-1022=w', 'c-1023=w');
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b filler
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c-1011=w filler
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c-1012=w filler
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c-1013=w filler
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c-1014=w filler
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c-1015=w filler
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c-1016=w filler
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c-1017=w filler
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c-1018=w filler
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c-1019=w filler
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c-1020=w filler
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c-1021=w filler
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c-1022=w filler
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c-1023=w filler
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select b,filler from t3 where (b>='c-1011=w' and b<= 'c-1018=w') or
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b IN ('c-1019=w', 'c-1020=w') or
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(b>='c-1021=w' and b<= 'c-1023=w');
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b filler
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c-1011=w filler
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c-1012=w filler
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c-1013=w filler
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c-1014=w filler
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c-1015=w filler
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c-1016=w filler
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c-1017=w filler
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c-1018=w filler
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c-1019=w filler
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c-1020=w filler
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c-1021=w filler
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c-1022=w filler
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c-1023=w filler
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create table t4 (a varchar(10), b int, c char(10), filler char(200),
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key idx1 (a, b, c));
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insert into t4 (filler) select concat('NULL-', 15-a) from t2 order by a limit 15;
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insert into t4 (a,b,c,filler)
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select 'b-1',NULL,'c-1', concat('NULL-', 15-a) from t2 order by a limit 15;
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insert into t4 (a,b,c,filler)
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select 'b-1',NULL,'c-222', concat('NULL-', 15-a) from t2 order by a limit 15;
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insert into t4 (a,b,c,filler)
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select 'bb-1',NULL,'cc-2', concat('NULL-', 15-a) from t2 order by a limit 15;
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insert into t4 (a,b,c,filler)
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select 'zz-1',NULL,'cc-2', 'filler-data' from t2 order by a limit 500;
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explain
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select * from t4 where a IS NULL and b IS NULL and (c IS NULL or c='no-such-row1'
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or c='no-such-row2');
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t4 range idx1 idx1 29 NULL 16 Using index condition; Using MRR
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select * from t4 where a IS NULL and b IS NULL and (c IS NULL or c='no-such-row1'
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or c='no-such-row2');
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a b c filler
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NULL NULL NULL NULL-15
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NULL NULL NULL NULL-14
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NULL NULL NULL NULL-13
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NULL NULL NULL NULL-12
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NULL NULL NULL NULL-11
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NULL NULL NULL NULL-10
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NULL NULL NULL NULL-9
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NULL NULL NULL NULL-8
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NULL NULL NULL NULL-7
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NULL NULL NULL NULL-6
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NULL NULL NULL NULL-5
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NULL NULL NULL NULL-4
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NULL NULL NULL NULL-3
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NULL NULL NULL NULL-2
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NULL NULL NULL NULL-1
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explain
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select * from t4 where (a ='b-1' or a='bb-1') and b IS NULL and (c='c-1' or c='cc-2');
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t4 range idx1 idx1 29 NULL 32 Using index condition; Using MRR
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select * from t4 where (a ='b-1' or a='bb-1') and b IS NULL and (c='c-1' or c='cc-2');
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a b c filler
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b-1 NULL c-1 NULL-15
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b-1 NULL c-1 NULL-14
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b-1 NULL c-1 NULL-13
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b-1 NULL c-1 NULL-12
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b-1 NULL c-1 NULL-11
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b-1 NULL c-1 NULL-10
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b-1 NULL c-1 NULL-9
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b-1 NULL c-1 NULL-8
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b-1 NULL c-1 NULL-7
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b-1 NULL c-1 NULL-6
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b-1 NULL c-1 NULL-5
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b-1 NULL c-1 NULL-4
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b-1 NULL c-1 NULL-3
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b-1 NULL c-1 NULL-2
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b-1 NULL c-1 NULL-1
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bb-1 NULL cc-2 NULL-15
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bb-1 NULL cc-2 NULL-14
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bb-1 NULL cc-2 NULL-13
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bb-1 NULL cc-2 NULL-12
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bb-1 NULL cc-2 NULL-11
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bb-1 NULL cc-2 NULL-10
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bb-1 NULL cc-2 NULL-9
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bb-1 NULL cc-2 NULL-8
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bb-1 NULL cc-2 NULL-7
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bb-1 NULL cc-2 NULL-6
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bb-1 NULL cc-2 NULL-5
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bb-1 NULL cc-2 NULL-4
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bb-1 NULL cc-2 NULL-3
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bb-1 NULL cc-2 NULL-2
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bb-1 NULL cc-2 NULL-1
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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');
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a b c filler
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b-1 NULL c-1 NULL-15
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b-1 NULL c-1 NULL-14
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b-1 NULL c-1 NULL-13
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b-1 NULL c-1 NULL-12
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b-1 NULL c-1 NULL-11
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b-1 NULL c-1 NULL-10
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b-1 NULL c-1 NULL-9
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b-1 NULL c-1 NULL-8
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b-1 NULL c-1 NULL-7
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b-1 NULL c-1 NULL-6
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b-1 NULL c-1 NULL-5
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b-1 NULL c-1 NULL-4
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b-1 NULL c-1 NULL-3
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b-1 NULL c-1 NULL-2
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b-1 NULL c-1 NULL-1
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bb-1 NULL cc-2 NULL-15
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bb-1 NULL cc-2 NULL-14
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bb-1 NULL cc-2 NULL-13
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bb-1 NULL cc-2 NULL-12
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bb-1 NULL cc-2 NULL-11
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bb-1 NULL cc-2 NULL-10
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bb-1 NULL cc-2 NULL-9
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bb-1 NULL cc-2 NULL-8
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bb-1 NULL cc-2 NULL-7
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bb-1 NULL cc-2 NULL-6
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bb-1 NULL cc-2 NULL-5
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bb-1 NULL cc-2 NULL-4
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bb-1 NULL cc-2 NULL-3
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bb-1 NULL cc-2 NULL-2
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bb-1 NULL cc-2 NULL-1
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drop table t1, t2, t3, t4;
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create table t1 (a int, b int not null,unique key (a,b),index(b));
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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);
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create table t2 like t1;
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insert into t2 select * from t1;
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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));
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select * from t1 where a is null;
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a b c
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NULL 7 0
|
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NULL 9 0
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NULL 9 0
|
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select * from t1 where (a is null or a > 0 and a < 3) and b > 7 limit 3;
|
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a b c
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NULL 9 0
|
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NULL 9 0
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select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
|
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a b c
|
||||
NULL 7 0
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NULL 9 0
|
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NULL 9 0
|
||||
drop table t1, t2;
|
||||
set storage_engine= @save_storage_engine;
|
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set @read_rnd_buffer_size_save= @@read_rnd_buffer_size;
|
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set read_rnd_buffer_size=64;
|
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Warnings:
|
||||
Warning 1292 Truncated incorrect read_rnd_buffer_size value: '64'
|
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create table t1(a int);
|
||||
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
||||
create table t2(a char(8), b char(8), c char(8), filler char(100), key(a,b,c) ) engine=InnoDB;
|
||||
insert into t2 select
|
||||
concat('a-', 1000 + A.a, '-a'),
|
||||
concat('b-', 1000 + B.a, '-b'),
|
||||
concat('c-', 1000 + C.a, '-c'),
|
||||
'filler'
|
||||
from t1 A, t1 B, t1 C;
|
||||
explain
|
||||
select count(length(a) + length(filler)) from t2 where a>='a-1000-a' and a <'a-1001-a';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 range a a 9 NULL 99 Using index condition; Using MRR
|
||||
select count(length(a) + length(filler)) from t2 where a>='a-1000-a' and a <'a-1001-a';
|
||||
count(length(a) + length(filler))
|
||||
100
|
||||
drop table t2;
|
||||
create table t2 (a char(100), b char(100), c char(100), d int,
|
||||
filler char(10), key(d), primary key (a,b,c)) engine= innodb;
|
||||
insert into t2 select A.a, B.a, B.a, A.a, 'filler' from t1 A, t1 B;
|
||||
explain select * from t2 force index (d) where d < 10;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 range d d 5 NULL 47 Using index condition; Using MRR
|
||||
drop table t2;
|
||||
drop table t1;
|
||||
set @@read_rnd_buffer_size= @read_rnd_buffer_size_save;
|
||||
create table t1 (f1 int not null, f2 int not null,f3 int not null, f4 char(1), primary key (f1,f2), key ix(f3))Engine=InnoDB;
|
||||
select * from t1 where (f3>=5 and f3<=10) or (f3>=1 and f3<=4);
|
||||
f1 f2 f3 f4
|
||||
1 1 1 A
|
||||
2 2 2 A
|
||||
3 3 3 A
|
||||
4 4 4 A
|
||||
5 5 5 A
|
||||
6 6 6 A
|
||||
7 7 7 A
|
||||
8 8 8 A
|
||||
9 9 9 A
|
||||
10 10 10 A
|
||||
drop table t1;
|
||||
|
||||
BUG#37977: Wrong result returned on GROUP BY + OR + Innodb
|
||||
|
||||
CREATE TABLE t1 (
|
||||
`pk` int(11) NOT NULL AUTO_INCREMENT,
|
||||
`int_nokey` int(11) NOT NULL,
|
||||
`int_key` int(11) NOT NULL,
|
||||
`date_key` date NOT NULL,
|
||||
`date_nokey` date NOT NULL,
|
||||
`time_key` time NOT NULL,
|
||||
`time_nokey` time NOT NULL,
|
||||
`datetime_key` datetime NOT NULL,
|
||||
`datetime_nokey` datetime NOT NULL,
|
||||
`varchar_key` varchar(5) DEFAULT NULL,
|
||||
`varchar_nokey` varchar(5) DEFAULT NULL,
|
||||
PRIMARY KEY (`pk`),
|
||||
KEY `int_key` (`int_key`),
|
||||
KEY `date_key` (`date_key`),
|
||||
KEY `time_key` (`time_key`),
|
||||
KEY `datetime_key` (`datetime_key`),
|
||||
KEY `varchar_key` (`varchar_key`)
|
||||
) ENGINE=InnoDB;
|
||||
INSERT INTO t1 VALUES
|
||||
(1,5,5,'2009-10-16','2009-10-16','09:28:15','09:28:15','2007-09-14 05:34:08','2007-09-14 05:34:08','qk','qk'),
|
||||
(2,6,6,'0000-00-00','0000-00-00','23:06:39','23:06:39','0000-00-00 00:00:00','0000-00-00 00:00:00','j','j'),
|
||||
(3,10,10,'2000-12-18','2000-12-18','22:16:19','22:16:19','2006-11-04 15:42:50','2006-11-04 15:42:50','aew','aew'),
|
||||
(4,0,0,'2001-09-18','2001-09-18','00:00:00','00:00:00','2004-03-23 13:23:35','2004-03-23 13:23:35',NULL,NULL),
|
||||
(5,6,6,'2007-08-16','2007-08-16','22:13:38','22:13:38','2004-08-19 11:01:28','2004-08-19 11:01:28','qu','qu');
|
||||
select pk from t1 WHERE `varchar_key` > 'kr' group by pk;
|
||||
pk
|
||||
1
|
||||
5
|
||||
select pk from t1 WHERE `int_nokey` IS NULL OR `varchar_key` > 'kr' group by pk;
|
||||
pk
|
||||
1
|
||||
5
|
||||
drop table t1;
|
||||
#
|
||||
# BUG#39447: Error with NOT NULL condition and LIMIT 1
|
||||
#
|
||||
CREATE TABLE t1 (
|
||||
id int(11) NOT NULL,
|
||||
parent_id int(11) DEFAULT NULL,
|
||||
name varchar(10) DEFAULT NULL,
|
||||
PRIMARY KEY (id),
|
||||
KEY ind_parent_id (parent_id)
|
||||
) ENGINE=InnoDB;
|
||||
insert into t1 (id, parent_id, name) values
|
||||
(10,NULL,'A'),
|
||||
(20,10,'B'),
|
||||
(30,10,'C'),
|
||||
(40,NULL,'D'),
|
||||
(50,40,'E'),
|
||||
(60,40,'F'),
|
||||
(70,NULL,'J');
|
||||
SELECT id FROM t1 WHERE parent_id IS NOT NULL ORDER BY id DESC LIMIT 1;
|
||||
id
|
||||
60
|
||||
This must show type=index, extra=Using where
|
||||
explain SELECT * FROM t1 FORCE INDEX (PRIMARY) WHERE parent_id IS NOT NULL ORDER BY id DESC LIMIT 1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index NULL PRIMARY 4 NULL 1 Using where
|
||||
SELECT * FROM t1 WHERE parent_id IS NOT NULL ORDER BY id DESC LIMIT 1;
|
||||
id parent_id name
|
||||
60 40 F
|
||||
drop table t1;
|
||||
Reference in New Issue
Block a user