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477 lines
22 KiB
477 lines
22 KiB
drop table if exists t1,t2;
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create table t1 (a int not null,b int not null, primary key using HASH (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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analyze table t1;
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Table Op Msg_type Msg_text
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test.t1 analyze note The storage engine for the table doesn't support analyze
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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 Visible Expression
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t1 0 PRIMARY 1 a NULL 3 NULL NULL HASH YES NULL
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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 HASH (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 HASH (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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delete from t1 where a > 0;
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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 (x int not null, y int not null, key x using HASH (x), unique y using HASH (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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select * from t1 where x=1;
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x y
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1 3
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1 1
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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 partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ALL x NULL NULL NULL 6 100.00 NULL
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1 SIMPLE t2 NULL eq_ref y y 4 test.t1.x 1 100.00 NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`x` AS `x`,`test`.`t1`.`y` AS `y`,`test`.`t2`.`x` AS `x`,`test`.`t2`.`y` AS `y` from `test`.`t1` join `test`.`t1` `t2` where (`test`.`t2`.`y` = `test`.`t1`.`x`)
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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 HASH (a), key using HASH (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 6
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1 5
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1 4
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1 3
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1 2
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1 1
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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 6
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1 5
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1 4
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1 3
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1 2
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1 1
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1 6
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1 5
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1 4
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1 3
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1 2
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1 1
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drop table t1;
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create table t1 (id int unsigned not null, primary key using HASH (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 HASH (btn)) charset utf8mb4 engine=heap;
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insert into t1 values ("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 "q%";
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ALL btn NULL NULL NULL 14 11.11 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`btn` AS `btn` from `test`.`t1` where (`test`.`t1`.`btn` like 'q%')
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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 HASH (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 partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ALL btn NULL NULL NULL 14 10.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`btn` AS `btn`,`test`.`t1`.`new_col` AS `new_col` from `test`.`t1` where (`test`.`t1`.`btn` = 'a')
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explain select * from t1 where btn="a" and new_col="a";
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref btn btn 44 const,const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`btn` AS `btn`,`test`.`t1`.`new_col` AS `new_col` from `test`.`t1` where ((`test`.`t1`.`new_col` = 'a') and (`test`.`t1`.`btn` = 'a'))
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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 HASH (a),
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UNIQUE b using HASH (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 partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 5 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (`test`.`t1`.`a` is null)
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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 partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref b b 5 const 1 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (`test`.`t1`.`b` is null)
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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 not null, primary key using HASH (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
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(
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a char(8) not null,
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b char(20) not null,
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c int not null,
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key (a)
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) charset utf8mb4 engine=heap;
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insert into t1 values ('aaaa', 'prefill-hash=5',0);
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insert into t1 values ('aaab', 'prefill-hash=0',0);
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insert into t1 values ('aaac', 'prefill-hash=7',0);
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insert into t1 values ('aaad', 'prefill-hash=2',0);
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insert into t1 values ('aaae', 'prefill-hash=1',0);
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insert into t1 values ('aaaf', 'prefill-hash=4',0);
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insert into t1 values ('aaag', 'prefill-hash=3',0);
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insert into t1 values ('aaah', 'prefill-hash=6',0);
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explain select * from t1 where a='aaaa';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaaa')
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explain select * from t1 where a='aaab';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaab')
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explain select * from t1 where a='aaac';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaac')
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explain select * from t1 where a='aaad';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaad')
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insert into t1 select * from t1;
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flush tables;
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explain select * from t1 where a='aaaa';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaaa')
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explain select * from t1 where a='aaab';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaab')
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explain select * from t1 where a='aaac';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaac')
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explain select * from t1 where a='aaad';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaad')
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flush tables;
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explain select * from t1 where a='aaaa';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaaa')
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explain select * from t1 where a='aaab';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaab')
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explain select * from t1 where a='aaac';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaac')
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explain select * from t1 where a='aaad';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaad')
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create table t2 as select * from t1;
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delete from t1;
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insert into t1 select * from t2;
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explain select * from t1 where a='aaaa';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaaa')
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explain select * from t1 where a='aaab';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaab')
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explain select * from t1 where a='aaac';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaac')
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explain select * from t1 where a='aaad';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref a a 32 const 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` = 'aaad')
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drop table t1, t2;
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create table t1 (
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id int unsigned not null primary key auto_increment,
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name varchar(20) not null,
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index heap_idx(name),
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index btree_idx using btree(name)
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) charset latin1 engine=heap;
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create table t2 (
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id int unsigned not null primary key auto_increment,
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name varchar(20) not null,
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index btree_idx using btree(name),
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index heap_idx(name)
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) charset latin1 engine=heap;
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insert into t1 (name) values ('Matt'), ('Lilu'), ('Corbin'), ('Carly'),
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('Suzy'), ('Hoppy'), ('Burrito'), ('Mimi'), ('Sherry'), ('Ben'), ('Phil'),
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('Emily');
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insert into t2 select * from t1;
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explain select * from t1 where name='matt';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref heap_idx,btree_idx btree_idx 22 const 1 100.00 NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`name` AS `name` from `test`.`t1` where (`test`.`t1`.`name` = 'matt')
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explain select * from t2 where name='matt';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 NULL ref btree_idx,heap_idx btree_idx 22 const 1 100.00 NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t2`.`id` AS `id`,`test`.`t2`.`name` AS `name` from `test`.`t2` where (`test`.`t2`.`name` = 'matt')
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explain select * from t1 where name='Lilu';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref heap_idx,btree_idx btree_idx 22 const 1 100.00 NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`name` AS `name` from `test`.`t1` where (`test`.`t1`.`name` = 'Lilu')
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explain select * from t2 where name='Lilu';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 NULL ref btree_idx,heap_idx btree_idx 22 const 1 100.00 NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t2`.`id` AS `id`,`test`.`t2`.`name` AS `name` from `test`.`t2` where (`test`.`t2`.`name` = 'Lilu')
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explain select * from t1 where name='Phil';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref heap_idx,btree_idx btree_idx 22 const 1 100.00 NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`name` AS `name` from `test`.`t1` where (`test`.`t1`.`name` = 'Phil')
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explain select * from t2 where name='Phil';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 NULL ref btree_idx,heap_idx btree_idx 22 const 1 100.00 NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t2`.`id` AS `id`,`test`.`t2`.`name` AS `name` from `test`.`t2` where (`test`.`t2`.`name` = 'Phil')
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explain select * from t1 where name='Lilu';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ref heap_idx,btree_idx btree_idx 22 const 1 100.00 NULL
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`name` AS `name` from `test`.`t1` where (`test`.`t1`.`name` = 'Lilu')
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explain select * from t2 where name='Lilu';
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 NULL ref btree_idx,heap_idx btree_idx 22 const 1 100.00 NULL
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Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`id` AS `id`,`test`.`t2`.`name` AS `name` from `test`.`t2` where (`test`.`t2`.`name` = 'Lilu')
|
|
insert into t1 (name) select name from t2;
|
|
insert into t1 (name) select name from t2;
|
|
insert into t1 (name) select name from t2;
|
|
insert into t1 (name) select name from t2;
|
|
insert into t1 (name) select name from t2;
|
|
insert into t1 (name) select name from t2;
|
|
flush tables;
|
|
select count(*) from t1 where name='Matt';
|
|
count(*)
|
|
7
|
|
explain select * from t1 ignore index (btree_idx) where name='matt';
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ref heap_idx heap_idx 22 const 7 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`name` AS `name` from `test`.`t1` IGNORE INDEX (`btree_idx`) where (`test`.`t1`.`name` = 'matt')
|
|
analyze table t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze note The storage engine for the table doesn't support analyze
|
|
show index from t1;
|
|
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Visible Expression
|
|
t1 0 PRIMARY 1 id NULL 84 NULL NULL HASH YES NULL
|
|
t1 1 heap_idx 1 name NULL 11 NULL NULL HASH YES NULL
|
|
t1 1 btree_idx 1 name A NULL NULL NULL BTREE YES NULL
|
|
show index from t1;
|
|
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Visible Expression
|
|
t1 0 PRIMARY 1 id NULL 84 NULL NULL HASH YES NULL
|
|
t1 1 heap_idx 1 name NULL 11 NULL NULL HASH YES NULL
|
|
t1 1 btree_idx 1 name A NULL NULL NULL BTREE YES NULL
|
|
create table t3
|
|
(
|
|
a varchar(20) not null,
|
|
b varchar(20) not null,
|
|
key (a,b)
|
|
) charset latin1 engine=heap;
|
|
insert into t3 select name, name from t1;
|
|
show index from t3;
|
|
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Visible Expression
|
|
t3 1 a 1 a NULL NULL NULL NULL HASH YES NULL
|
|
t3 1 a 2 b NULL 11 NULL NULL HASH YES NULL
|
|
show index from t3;
|
|
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Visible Expression
|
|
t3 1 a 1 a NULL NULL NULL NULL HASH YES NULL
|
|
t3 1 a 2 b NULL 11 NULL NULL HASH YES NULL
|
|
explain select * from t1 ignore key(btree_idx), t3 where t1.name='matt' and t3.a = concat('',t1.name) and t3.b=t1.name;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ref heap_idx heap_idx 22 const 7 100.00 NULL
|
|
1 SIMPLE t3 NULL ALL a NULL NULL NULL 84 1.19 Using where; Using join buffer (Block Nested Loop)
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`name` AS `name`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t1` IGNORE INDEX (`btree_idx`) join `test`.`t3` where ((`test`.`t1`.`name` = 'matt') and (`test`.`t3`.`b` = 'matt') and (`test`.`t3`.`a` = concat('',`test`.`t1`.`name`)))
|
|
drop table t1, t2, t3;
|
|
create temporary table t1 ( a int, index (a) ) engine=memory;
|
|
insert into t1 values (1),(2),(3),(4),(5);
|
|
select a from t1 where a in (1,3);
|
|
a
|
|
1
|
|
3
|
|
explain select a from t1 where a in (1,3);
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL range a a 5 NULL 4 100.00 Using where
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` in (1,3))
|
|
drop table t1;
|
|
End of 4.1 tests
|
|
CREATE TABLE t1(col1 VARCHAR(32) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
|
|
col2 VARCHAR(32) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
|
|
UNIQUE KEY key1 USING HASH (col1, col2)) ENGINE=MEMORY;
|
|
Warnings:
|
|
Warning 3719 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
|
|
Warning 3778 'utf8_bin' is a collation of the deprecated character set UTF8MB3. Please consider using UTF8MB4 with an appropriate collation instead.
|
|
Warning 3719 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
|
|
Warning 3778 'utf8_bin' is a collation of the deprecated character set UTF8MB3. Please consider using UTF8MB4 with an appropriate collation instead.
|
|
INSERT INTO t1 VALUES('A', 'A');
|
|
INSERT INTO t1 VALUES('A ', 'A ');
|
|
ERROR 23000: Duplicate entry 'A -A ' for key 'key1'
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1(col1 VARCHAR(32) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL,
|
|
col2 VARCHAR(32) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL,
|
|
UNIQUE KEY key1 USING HASH (col1, col2)) ENGINE=MEMORY;
|
|
INSERT INTO t1 VALUES('A', 'A');
|
|
INSERT INTO t1 VALUES('A ', 'A ');
|
|
ERROR 23000: Duplicate entry 'A -A ' for key 'key1'
|
|
DROP TABLE t1;
|
|
End of 5.0 tests
|
|
#
|
|
# Bug #55472: Assertion failed in heap_rfirst function of hp_rfirst.c
|
|
# on DELETE statement
|
|
#
|
|
CREATE TABLE t1 (col_int_nokey INT,
|
|
col_int_key INT,
|
|
INDEX(col_int_key) USING HASH) ENGINE = HEAP;
|
|
INSERT INTO t1 (col_int_nokey, col_int_key) VALUES (3, 0), (4, 0), (3, 1);
|
|
DELETE FROM t1 WHERE col_int_nokey = 5 ORDER BY col_int_key LIMIT 2;
|
|
DROP TABLE t1;
|
|
#
|
|
# Bug #44771: Unique Hash index in memory engine will give wrong
|
|
# query result for NULL value.
|
|
#
|
|
CREATE TABLE t1
|
|
(
|
|
pk INT PRIMARY KEY,
|
|
val INT,
|
|
UNIQUE KEY USING HASH(val)
|
|
) ENGINE=MEMORY;
|
|
INSERT INTO t1 VALUES (1, NULL);
|
|
INSERT INTO t1 VALUES (2, NULL);
|
|
INSERT INTO t1 VALUES (3, NULL);
|
|
INSERT INTO t1 VALUES (4, NULL);
|
|
SELECT * FROM t1 WHERE val IS NULL;
|
|
pk val
|
|
4 NULL
|
|
3 NULL
|
|
2 NULL
|
|
1 NULL
|
|
EXPLAIN SELECT * FROM t1 WHERE val IS NULL;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ref val val 5 const 1 100.00 Using where
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk`,`test`.`t1`.`val` AS `val` from `test`.`t1` where (`test`.`t1`.`val` is null)
|
|
DROP TABLE t1;
|
|
End of 5.5 tests
|
|
# Bug#24364448: Check that hash indexes are not used to provide ordering
|
|
CREATE TABLE t1(
|
|
id INT AUTO_INCREMENT PRIMARY KEY,
|
|
c1 INT NOT NULL,
|
|
c2 INT NOT NULL,
|
|
UNIQUE KEY USING HASH (c2,c1)) ENGINE = MEMORY;
|
|
INSERT INTO t1(c1,c2) VALUES (5,1), (4,1), (3,5), (2,3), (1,3);
|
|
EXPLAIN SELECT c2, COUNT(c1) FROM t1 GROUP BY c2;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL c2 NULL NULL NULL 5 100.00 Using temporary
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`c2` AS `c2`,count(`test`.`t1`.`c1`) AS `COUNT(c1)` from `test`.`t1` group by `test`.`t1`.`c2`
|
|
SELECT c2, COUNT(c1) FROM t1 GROUP BY c2;
|
|
c2 COUNT(c1)
|
|
1 2
|
|
5 1
|
|
3 2
|
|
DROP TABLE t1;
|
|
|