mirror of
https://github.com/MariaDB/server.git
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393 lines
11 KiB
Text
393 lines
11 KiB
Text
drop table if exists t1;
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create table t1 (a int not null,b int not null, primary key using BTREE (a)) engine=heap comment="testing heaps" avg_row_length=100 min_rows=1 max_rows=100;
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insert into t1 values(1,1),(2,2),(3,3),(4,4);
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delete from t1 where a=1 or a=0;
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show keys from t1;
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Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Ignored
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t1 0 PRIMARY 1 a A NULL NULL NULL BTREE NO
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select * from t1;
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a b
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2 2
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3 3
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4 4
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select * from t1 where a=4;
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a b
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4 4
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update t1 set b=5 where a=4;
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update t1 set b=b+1 where a>=3;
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replace t1 values (3,3);
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select * from t1;
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a b
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2 2
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3 3
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4 6
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alter table t1 add c int not null, add key using BTREE (c,a);
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drop table t1;
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create table t1 (a int not null,b int not null, primary key using BTREE (a)) engine=heap comment="testing heaps";
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insert into t1 values(-2,-2),(-1,-1),(0,0),(1,1),(2,2),(3,3),(4,4);
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delete from t1 where a > -3;
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select * from t1;
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a b
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drop table t1;
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create table t1 (a int not null,b int not null, primary key using BTREE (a)) engine=heap comment="testing heaps";
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insert into t1 values(1,1),(2,2),(3,3),(4,4);
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alter table t1 modify a int not null auto_increment, engine=myisam, comment="new myisam table";
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select * from t1;
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a b
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1 1
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2 2
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3 3
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4 4
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drop table t1;
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create table t1 (a int not null) engine=heap;
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insert into t1 values (869751),(736494),(226312),(802616),(728912);
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select * from t1 where a > 736494;
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a
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869751
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802616
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alter table t1 add unique uniq_id using BTREE (a);
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select * from t1 where a > 736494;
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a
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802616
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869751
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select * from t1 where a = 736494;
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a
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736494
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select * from t1 where a=869751 or a=736494;
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a
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736494
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869751
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select * from t1 where a in (869751,736494,226312,802616);
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a
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226312
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736494
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802616
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869751
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explain select * from t1 where a in (869751,736494,226312,802616);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range uniq_id uniq_id 4 NULL 4 Using where
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alter table t1 engine=myisam;
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explain select * from t1 where a in (869751,736494,226312,802616);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range uniq_id uniq_id 4 NULL 4 Using where; Using index
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insert into t1 values (1),(2),(3),(4),(5),(6);
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explain select * from t1 where a in (869751,736494,226312,802616);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range uniq_id uniq_id 4 NULL 4 Using where; Using index
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drop table t1;
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create table t1 (x int not null, y int not null, key x using BTREE (x,y), unique y using BTREE (y))
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engine=heap;
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insert into t1 values (1,1),(2,2),(1,3),(2,4),(2,5),(2,6);
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explain select * from t1 where x=1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref x x 4 const 1
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select * from t1 where x=1;
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x y
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1 1
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1 3
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select * from t1,t1 as t2 where t1.x=t2.y;
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x y x y
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1 1 1 1
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2 2 2 2
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1 3 1 1
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2 4 2 2
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2 5 2 2
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2 6 2 2
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explain select * from t1,t1 as t2 where t1.x=t2.y;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL x NULL NULL NULL 6
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1 SIMPLE t2 eq_ref y y 4 test.t1.x 1
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drop table t1;
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create table t1 (a int) engine=heap;
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insert into t1 values(1);
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select max(a) from t1;
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max(a)
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1
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drop table t1;
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CREATE TABLE t1 ( a int not null default 0, b int not null default 0, key using BTREE (a,b), key using BTREE (b) ) ENGINE=HEAP;
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insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
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select * from t1 where a=1;
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a b
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1 1
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1 2
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1 3
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1 4
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1 5
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1 6
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insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
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select * from t1 where a=1;
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a b
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1 1
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1 1
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1 2
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1 2
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1 3
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1 3
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1 4
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1 4
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1 5
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1 5
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1 6
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1 6
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explain select * from tx where a=x order by a,b;
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id select_type table type possible_keys key key_len ref rows Extra
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x SIMPLE tx ref a a x const x Using where
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explain select * from tx where a=x order by b;
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id select_type table type possible_keys key key_len ref rows Extra
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x SIMPLE tx ref a a x const x Using where
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select * from t1 where b=1;
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a b
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1 1
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1 1
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explain select * from tx where b=x;
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id select_type table type possible_keys key key_len ref rows Extra
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x SIMPLE tx ref b b x const x
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drop table t1;
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create table t1 (id int unsigned not null, primary key using BTREE (id)) engine=HEAP;
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insert into t1 values(1);
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select max(id) from t1;
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max(id)
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1
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insert into t1 values(2);
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select max(id) from t1;
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max(id)
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2
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replace into t1 values(1);
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drop table t1;
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create table t1 (n int) engine=heap;
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drop table t1;
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create table t1 (n int) engine=heap;
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drop table if exists t1;
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CREATE table t1(f1 int not null,f2 char(20) not
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null,index(f2)) engine=heap;
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INSERT into t1 set f1=12,f2="bill";
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INSERT into t1 set f1=13,f2="bill";
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INSERT into t1 set f1=14,f2="bill";
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INSERT into t1 set f1=15,f2="bill";
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INSERT into t1 set f1=16,f2="ted";
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INSERT into t1 set f1=12,f2="ted";
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INSERT into t1 set f1=12,f2="ted";
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INSERT into t1 set f1=12,f2="ted";
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INSERT into t1 set f1=12,f2="ted";
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delete from t1 where f2="bill";
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select * from t1;
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f1 f2
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16 ted
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12 ted
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12 ted
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12 ted
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12 ted
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drop table t1;
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create table t1 (btn char(10) not null, key using BTREE (btn)) engine=heap;
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insert into t1 values ("hello"),("hello"),("hello"),("hello"),("hello"),("hello"),("hello"), ("a"),("b"),("c"),("d"),("e"),("f"),("g"),("h"),("i");
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explain select * from t1 where btn like "i%";
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range btn btn 40 NULL 1 Using where
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explain select * from t1 where btn like "h%";
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range btn btn 40 NULL # Using where
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explain select * from t1 where btn like "a%";
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range btn btn 40 NULL 1 Using where
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explain select * from t1 where btn like "b%";
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range btn btn 40 NULL 1 Using where
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select * from t1 where btn like "ff%";
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btn
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select * from t1 where btn like " %";
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btn
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select * from t1 where btn like "q%";
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btn
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alter table t1 add column new_col char(1) not null, add key using BTREE (btn,new_col), drop key btn;
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update t1 set new_col=left(btn,1);
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explain select * from t1 where btn="a";
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref btn btn 40 const 1 Using where
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explain select * from t1 where btn="a" and new_col="a";
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref btn btn 44 const,const 1 Using where
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drop table t1;
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CREATE TABLE t1 (
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a int default NULL,
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b int default NULL,
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KEY a using BTREE (a),
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UNIQUE b using BTREE (b)
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) engine=heap;
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INSERT INTO t1 VALUES (NULL,99),(99,NULL),(1,1),(2,2),(1,3);
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SELECT * FROM t1 WHERE a=NULL;
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a b
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explain SELECT * FROM t1 WHERE a IS NULL;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref a a 5 const 1 Using where
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SELECT * FROM t1 WHERE a<=>NULL;
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a b
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NULL 99
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SELECT * FROM t1 WHERE b=NULL;
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a b
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explain SELECT * FROM t1 WHERE b IS NULL;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref b b 5 const 1 Using where
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SELECT * FROM t1 WHERE b<=>NULL;
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a b
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99 NULL
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INSERT INTO t1 VALUES (1,3);
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ERROR 23000: Duplicate entry '3' for key 'b'
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DROP TABLE t1;
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CREATE TABLE t1 (a int, b int, c int, key using BTREE (a, b, c)) engine=heap;
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INSERT INTO t1 VALUES (1, NULL, NULL), (1, 1, NULL), (1, NULL, 1);
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SELECT * FROM t1 WHERE a=1 and b IS NULL;
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a b c
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1 NULL NULL
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1 NULL 1
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SELECT * FROM t1 WHERE a=1 and c IS NULL;
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a b c
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1 NULL NULL
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1 1 NULL
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SELECT * FROM t1 WHERE a=1 and b IS NULL and c IS NULL;
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a b c
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1 NULL NULL
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DROP TABLE t1;
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CREATE TABLE t1 (a int not null, primary key using BTREE (a)) engine=heap;
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INSERT into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11);
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DELETE from t1 where a < 100;
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SELECT * from t1;
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a
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DROP TABLE t1;
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create table t1(a int not null, key using btree(a)) engine=heap;
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insert into t1 values (2), (2), (2), (1), (1), (3), (3), (3), (3);
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select a from t1 where a > 2 order by a;
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a
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3
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3
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3
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3
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delete from t1 where a < 4;
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select a from t1 order by a;
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a
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insert into t1 values (2), (2), (2), (1), (1), (3), (3), (3), (3);
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select a from t1 where a > 4 order by a;
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a
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delete from t1 where a > 4;
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select a from t1 order by a;
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a
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1
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1
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2
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2
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2
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3
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3
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3
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3
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select a from t1 where a > 3 order by a;
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a
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delete from t1 where a >= 2;
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select a from t1 order by a;
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a
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1
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1
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drop table t1;
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CREATE TABLE t1 (
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c1 CHAR(3),
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c2 INTEGER,
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KEY USING BTREE(c1),
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KEY USING BTREE(c2)
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) ENGINE= MEMORY;
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INSERT INTO t1 VALUES ('ABC',0), ('A',0), ('B',0), ('C',0);
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UPDATE t1 SET c2= c2 + 1 WHERE c1 = 'A';
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SELECT * FROM t1;
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c1 c2
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ABC 0
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A 1
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B 0
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C 0
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DROP TABLE t1;
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CREATE TABLE t1 (
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c1 ENUM('1', '2'),
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UNIQUE USING BTREE(c1)
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) ENGINE= MEMORY DEFAULT CHARSET= utf8;
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INSERT INTO t1 VALUES('1'), ('2');
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DROP TABLE t1;
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CREATE TABLE t1 (
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c1 SET('1', '2'),
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UNIQUE USING BTREE(c1)
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) ENGINE= MEMORY DEFAULT CHARSET= utf8;
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INSERT INTO t1 VALUES('1'), ('2');
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DROP TABLE t1;
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CREATE TABLE t1 (a INT, KEY USING BTREE(a)) ENGINE=MEMORY;
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INSERT INTO t1 VALUES(1),(2),(2);
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DELETE FROM t1 WHERE a=2;
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SELECT * FROM t1;
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a
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1
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DROP TABLE t1;
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End of 4.1 tests
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CREATE TABLE t1(val INT, KEY USING BTREE(val)) ENGINE=memory;
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INSERT INTO t1 VALUES(0);
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SELECT INDEX_LENGTH FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA=DATABASE() AND TABLE_NAME='t1';
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INDEX_LENGTH
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21
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UPDATE t1 SET val=1;
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SELECT INDEX_LENGTH FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA=DATABASE() AND TABLE_NAME='t1';
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INDEX_LENGTH
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21
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DROP TABLE t1;
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CREATE TABLE t1 (a INT, UNIQUE USING BTREE(a)) ENGINE=MEMORY;
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INSERT INTO t1 VALUES(NULL),(NULL);
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DROP TABLE t1;
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create table t1(a varchar(255), b varchar(255),
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key using btree (a,b)) engine=memory;
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insert into t1 values (1, 1), (3, 3), (2, 2), (NULL, 1), (NULL, NULL), (0, 0);
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select * from t1 where a is null;
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a b
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NULL NULL
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NULL 1
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drop table t1;
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#
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# bug#39918 - memory (heap) engine crashing while executing self join with delete
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#
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CREATE TABLE t1(a INT, KEY USING BTREE (a)) ENGINE=MEMORY;
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INSERT INTO t1 VALUES(1),(1);
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DELETE a1 FROM t1 AS a1, t1 AS a2 WHERE a1.a=a2.a;
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DROP TABLE t1;
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End of 5.0 tests
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# bit index in heap tables
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create table t1 (a bit(63) not null) engine=heap;
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insert into t1 values (869751),(736494),(226312),(802616),(728912);
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alter table t1 add unique uniq_id using BTREE (a);
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select 0+a from t1 where a > 736494;
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0+a
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802616
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869751
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explain select 0+a from t1 where a > 736494;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range uniq_id uniq_id 8 NULL 3 Using where
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select 0+a from t1 where a = 736494;
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0+a
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736494
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explain select 0+a from t1 where a = 736494;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 const uniq_id uniq_id 8 const 1
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select 0+a from t1 where a=869751 or a=736494;
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0+a
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736494
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869751
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explain select 0+a from t1 where a=869751 or a=736494;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range uniq_id uniq_id 8 NULL 2 Using where
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insert into t1 (a) select * from seq_1_to_100;
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select 0+a from t1 where a in (869751,736494,226312,802616);
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0+a
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226312
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736494
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802616
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869751
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explain select 0+a from t1 where a in (869751,736494,226312,802616);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range uniq_id uniq_id 8 NULL 4 Using where
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drop table t1;
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End of 5.3 tests
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create table t1 (id int, a varchar(300) not null, key using btree(a)) engine=heap;
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insert t1 values (1, repeat('a', 300));
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drop table t1;
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End of 5.5 tests
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