mirror of
https://github.com/MariaDB/server.git
synced 2025-10-31 02:46:29 +01:00
238 lines
9.3 KiB
Text
238 lines
9.3 KiB
Text
drop table if exists t0,t1,t2,t3;
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set @innodb_mrr_cpk_tmp=@@optimizer_switch;
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set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
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set @save_join_cache_level=@@join_cache_level;
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set join_cache_level=6;
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set @save_storage_engine=@@default_storage_engine;
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set default_storage_engine=innodb;
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create table t0(a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1(a char(8), b char(8), filler char(100), primary key(a)) charset=latin1;
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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` char(8) NOT NULL,
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`b` char(8) DEFAULT NULL,
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`filler` char(100) DEFAULT NULL,
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PRIMARY KEY (`a`)
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) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
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insert into t1 select
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concat('a-', 1000 + A.a + B.a*10 + C.a*100, '=A'),
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concat('b-', 1000 + A.a + B.a*10 + C.a*100, '=B'),
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'filler'
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from t0 A, t0 B, t0 C;
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create table t2 (a char(8)) charset=latin1;
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insert into t2 values ('a-1010=A'), ('a-1030=A'), ('a-1020=A');
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This should use join buffer:
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explain select * from t1, t2 where t1.a=t2.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
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1 SIMPLE t1 eq_ref PRIMARY PRIMARY 8 test.t2.a 1 Using join buffer (flat, BKA join); Key-ordered scan
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This output must be sorted by value of t1.a:
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select * from t1, t2 where t1.a=t2.a;
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a b filler a
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a-1010=A b-1010=B filler a-1010=A
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a-1020=A b-1020=B filler a-1020=A
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a-1030=A b-1030=B filler a-1030=A
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drop table t1, t2;
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create table t1(
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a char(8) character set utf8, b int, filler char(100),
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primary key(a,b)
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);
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insert into t1 select
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concat('a-', 1000 + A.a + B.a*10 + C.a*100, '=A'),
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1000 + A.a + B.a*10 + C.a*100,
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'filler'
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from t0 A, t0 B, t0 C;
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create table t2 (a char(8) character set utf8, b int);
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insert into t2 values ('a-1010=A', 1010), ('a-1030=A', 1030), ('a-1020=A', 1020);
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explain select * from t1, t2 where t1.a=t2.a and t1.b=t2.b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
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1 SIMPLE t1 eq_ref PRIMARY PRIMARY 28 test.t2.a,test.t2.b 1 Using join buffer (flat, BKA join); Key-ordered scan
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select * from t1, t2 where t1.a=t2.a and t1.b=t2.b;
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a b filler a b
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a-1010=A 1010 filler a-1010=A 1010
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a-1020=A 1020 filler a-1020=A 1020
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a-1030=A 1030 filler a-1030=A 1030
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insert into t2 values ('a-1030=A', 1030), ('a-1020=A', 1020);
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explain select * from t1, t2 where t1.a=t2.a and t1.b=t2.b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 5 Using where
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1 SIMPLE t1 eq_ref PRIMARY PRIMARY 28 test.t2.a,test.t2.b 1 Using join buffer (flat, BKA join); Key-ordered scan
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select * from t1, t2 where t1.a=t2.a and t1.b=t2.b;
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a b filler a b
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a-1010=A 1010 filler a-1010=A 1010
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a-1020=A 1020 filler a-1020=A 1020
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a-1020=A 1020 filler a-1020=A 1020
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a-1030=A 1030 filler a-1030=A 1030
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a-1030=A 1030 filler a-1030=A 1030
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drop table t1, t2;
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create table t1(
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a varchar(8) character set utf8, b int, filler char(100),
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primary key(a,b)
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);
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insert into t1 select
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concat('a-', 1000 + A.a + B.a*10 + C.a*100, '=A'),
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1000 + A.a + B.a*10 + C.a*100,
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'filler'
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from t0 A, t0 B, t0 C;
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create table t2 (a char(8) character set utf8, b int);
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insert into t2 values ('a-1010=A', 1010), ('a-1030=A', 1030), ('a-1020=A', 1020);
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explain select * from t1, t2 where t1.a=t2.a and t1.b=t2.b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
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1 SIMPLE t1 eq_ref PRIMARY PRIMARY 30 test.t2.a,test.t2.b 1 Using where; Using join buffer (flat, BKA join); Key-ordered scan
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select * from t1, t2 where t1.a=t2.a and t1.b=t2.b;
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a b filler a b
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a-1010=A 1010 filler a-1010=A 1010
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a-1020=A 1020 filler a-1020=A 1020
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a-1030=A 1030 filler a-1030=A 1030
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explain select * from t1, t2 where t1.a=t2.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
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1 SIMPLE t1 ref PRIMARY PRIMARY 26 test.t2.a 1 Using where; Using join buffer (flat, BKA join); Key-ordered scan
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select * from t1, t2 where t1.a=t2.a;
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a b filler a b
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a-1010=A 1010 filler a-1010=A 1010
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a-1020=A 1020 filler a-1020=A 1020
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a-1030=A 1030 filler a-1030=A 1030
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drop table t1, t2;
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create table t1 (a int, b int, c int, filler char(100), primary key(a,b,c));
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insert into t1 select A.a, B.a, C.a, 'filler' from t0 A, t0 B, t0 C;
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insert into t1 values (11, 11, 11, 'filler');
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insert into t1 values (11, 11, 12, 'filler');
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insert into t1 values (11, 11, 13, 'filler');
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insert into t1 values (11, 22, 1234, 'filler');
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insert into t1 values (11, 33, 124, 'filler');
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insert into t1 values (11, 33, 125, 'filler');
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create table t2 (a int, b int);
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insert into t2 values (11,33), (11,22), (11,11);
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explain select * from t1, t2 where t1.a=t2.a and t1.b=t2.b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
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1 SIMPLE t1 ref PRIMARY PRIMARY 8 test.t2.a,test.t2.b 1 Using join buffer (flat, BKA join); Key-ordered scan
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select * from t1, t2 where t1.a=t2.a and t1.b=t2.b;
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a b c filler a b
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11 11 11 filler 11 11
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11 11 12 filler 11 11
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11 11 13 filler 11 11
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11 22 1234 filler 11 22
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11 33 124 filler 11 33
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11 33 125 filler 11 33
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set join_cache_level=0;
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select * from t1, t2 where t1.a=t2.a and t1.b=t2.b;
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a b c filler a b
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11 33 124 filler 11 33
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11 33 125 filler 11 33
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11 22 1234 filler 11 22
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11 11 11 filler 11 11
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11 11 12 filler 11 11
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11 11 13 filler 11 11
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set join_cache_level=6;
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explain select * from t1, t2 where t1.a=t2.a and t2.b + t1.b > 100;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
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1 SIMPLE t1 ref PRIMARY PRIMARY 4 test.t2.a 1 Using where; Using join buffer (flat, BKA join); Key-ordered scan
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select * from t1, t2 where t1.a=t2.a and t2.b + t1.b > 100;
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a b c filler a b
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set optimizer_switch='index_condition_pushdown=off';
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explain select * from t1, t2 where t1.a=t2.a and t2.b + t1.b > 100;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
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1 SIMPLE t1 ref PRIMARY PRIMARY 4 test.t2.a 1 Using where; Using join buffer (flat, BKA join); Key-ordered scan
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select * from t1, t2 where t1.a=t2.a and t2.b + t1.b > 100;
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a b c filler a b
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set optimizer_switch='index_condition_pushdown=on';
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drop table t1,t2;
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drop table t0;
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#
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# MDEV-6878: Use of uninitialized saved_primary_key in Mrr_ordered_index_reader::resume_read()
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#
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create table t0(a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1 (
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pk varchar(32) character set utf8 primary key,
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kp1 char(32) not null,
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col1 varchar(32),
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key (kp1)
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) engine=innodb charset=latin1;
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insert into t1
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select
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concat('pk-', 1000 +A.a),
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concat('kp1-', 1000 +A.a),
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concat('val-', 1000 +A.a)
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from test.t0 A ;
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create table t2 as select kp1 as a from t1;
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set join_cache_level=8;
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set optimizer_switch='mrr=on,mrr_sort_keys=on';
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explain
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select * from t2 straight_join t1 force index(kp1) where t1.kp1=t2.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 10
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1 SIMPLE t1 ref kp1 kp1 32 test.t2.a 1 Using join buffer (flat, BKAH join); Key-ordered Rowid-ordered scan
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select * from t2 straight_join t1 force index(kp1) where t1.kp1=t2.a;
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a pk kp1 col1
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kp1-1000 pk-1000 kp1-1000 val-1000
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kp1-1001 pk-1001 kp1-1001 val-1001
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kp1-1002 pk-1002 kp1-1002 val-1002
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kp1-1003 pk-1003 kp1-1003 val-1003
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kp1-1004 pk-1004 kp1-1004 val-1004
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kp1-1005 pk-1005 kp1-1005 val-1005
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kp1-1006 pk-1006 kp1-1006 val-1006
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kp1-1007 pk-1007 kp1-1007 val-1007
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kp1-1008 pk-1008 kp1-1008 val-1008
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kp1-1009 pk-1009 kp1-1009 val-1009
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drop table t0,t1,t2;
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#
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#
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# MDEV-3817: Wrong result with index_merge+index_merge_intersection, InnoDB table, join, AND and OR conditions
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#
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set @tmp_mdev3817=@@optimizer_switch;
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SET optimizer_switch='index_merge=on,index_merge_intersection=on';
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CREATE TABLE t1 (
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a INT PRIMARY KEY,
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b INT,
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c VARCHAR(1024) CHARACTER SET utf8,
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d INT,
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KEY (b)
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) ENGINE=InnoDB;
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INSERT INTO t1 VALUES
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(1, 9, 'one', 11), (2, 6, 'two', 12), (3, 2, 'three', 13), (4, 5, 'four', 14);
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CREATE TABLE t2 (e INT, g INT) ENGINE=InnoDB;
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INSERT INTO t2 VALUES (1,9), (2,6) ;
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SELECT * FROM t1, t2 WHERE g = b AND ( a < 7 OR a > e );
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a b c d e g
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1 9 one 11 1 9
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2 6 two 12 2 6
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DROP TABLE t1, t2;
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set optimizer_switch=@tmp_mdev3817;
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#
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# MDEV-5037: Server crash on a JOIN on a derived table with join_cache_level > 2
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#
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create table t0 (a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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CREATE TABLE t1 (
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id char(8) CHARACTER SET utf8 NOT NULL
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) ENGINE=InnoDB DEFAULT CHARSET=latin1;
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CREATE TABLE t2 (
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id char(8) CHARACTER SET utf8 DEFAULT NULL,
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url text CHARACTER SET utf8
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) ENGINE=InnoDB DEFAULT CHARSET=latin1;
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insert into t1 select '03b2ca8c' from t0 A, t0 B limit 80;
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insert into t2 select '03b2ca8c','' from t0 A, t0 B, t0 C;
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set @tmp_mdev5037=@@join_cache_level;
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set join_cache_level=3;
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explain SELECT 1 FROM (SELECT url, id FROM t2 LIMIT 1 OFFSET 20) derived RIGHT JOIN t1 ON t1.id = derived.id;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL #
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1 PRIMARY <derived2> ref key0 key0 25 test.t1.id #
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2 DERIVED t2 ALL NULL NULL NULL NULL #
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set join_cache_level= @tmp_mdev5037;
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drop table t0,t1,t2;
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#
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# This must be at the end:
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#
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set @@join_cache_level= @save_join_cache_level;
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set default_storage_engine=@save_storage_engine;
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set optimizer_switch=@innodb_mrr_cpk_tmp;
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