1248 lines
48 KiB
Plaintext
1248 lines
48 KiB
Plaintext
create table t1(a varchar(2) primary key) ENGINE=XENGINE;
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insert into t1 values('');
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create index t1a1 on t1(a(1));
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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drop table t1;
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create table t1(a int not null, b int, c char(10) not null, d varchar(20)) ENGINE=XENGINE;
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insert into t1 values (5,5,'oo','oo'),(4,4,'tr','tr'),(3,4,'ad','ad'),(2,3,'ak','ak');
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commit;
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alter table t1 add index b (b), add index b (b);
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ERROR 42000: Duplicate key name 'b'
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alter table t1 add index (b,b);
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ERROR 42S21: Duplicate column name 'b'
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alter table t1 add index d2 (d);
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) NOT NULL,
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`b` int(11) DEFAULT NULL,
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`c` char(10) COLLATE utf8mb4_general_ci NOT NULL,
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`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
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KEY `d2` (`d`)
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) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
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analyze table t1;
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explain select * from t1 force index(d2) order by d;
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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 index NULL d2 83 NULL # 100.00 NULL
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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`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`d2`) order by `test`.`t1`.`d`
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select * from t1 force index (d2) order by d;
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a b c d
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3 4 ad ad
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2 3 ak ak
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5 5 oo oo
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4 4 tr tr
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alter table t1 add unique index (b);
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ERROR 23000: Duplicate entry '4' for key 'b'
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) NOT NULL,
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`b` int(11) DEFAULT NULL,
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`c` char(10) COLLATE utf8mb4_general_ci NOT NULL,
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`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
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KEY `d2` (`d`)
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) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
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alter table t1 add index (b);
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) NOT NULL,
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`b` int(11) DEFAULT NULL,
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`c` char(10) COLLATE utf8mb4_general_ci NOT NULL,
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`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
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KEY `d2` (`d`),
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KEY `b` (`b`)
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) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
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alter table t1 add unique index (c), add index (d);
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 1
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Warnings:
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Warning 1831 Duplicate index 'd' defined on the table 'test.t1'. This is deprecated and will be disallowed in a future release.
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) NOT NULL,
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`b` int(11) DEFAULT NULL,
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`c` char(10) COLLATE utf8mb4_general_ci NOT NULL,
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`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
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UNIQUE KEY `c` (`c`),
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KEY `d2` (`d`),
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KEY `b` (`b`),
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KEY `d` (`d`)
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) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
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analyze table t1;
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Table Op Msg_type Msg_text
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test.t1 analyze status OK
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explain select * from t1 force index(c) order by c;
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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 index NULL c 40 NULL # 100.00 NULL
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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`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`c`) order by `test`.`t1`.`c`
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alter table t1 add primary key (a), drop index c;
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) NOT NULL,
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`b` int(11) DEFAULT NULL,
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`c` char(10) COLLATE utf8mb4_general_ci NOT NULL,
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`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
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PRIMARY KEY (`a`),
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KEY `d2` (`d`),
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KEY `b` (`b`),
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KEY `d` (`d`)
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) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
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affected rows: 1
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alter table t1 add primary key (c);
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ERROR 42000: Multiple primary key defined
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alter table t1 drop primary key, add primary key (b);
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ERROR 23000: Duplicate entry '4' for key 'PRIMARY'
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create unique index c on t1 (c);
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) NOT NULL,
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`b` int(11) DEFAULT NULL,
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`c` char(10) COLLATE utf8mb4_general_ci NOT NULL,
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`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
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PRIMARY KEY (`a`),
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UNIQUE KEY `c` (`c`),
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KEY `d2` (`d`),
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KEY `b` (`b`),
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KEY `d` (`d`)
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) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
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analyze table t1;
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Table Op Msg_type Msg_text
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test.t1 analyze status OK
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explain select * from t1 force index(c) order by c;
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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 index NULL c 40 NULL # 100.00 NULL
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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`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`c`) order by `test`.`t1`.`c`
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select * from t1 force index(c) order by c;
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a b c d
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3 4 ad ad
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2 3 ak ak
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5 5 oo oo
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4 4 tr tr
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alter table t1 drop index b, add index (b);
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) NOT NULL,
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`b` int(11) DEFAULT NULL,
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`c` char(10) COLLATE utf8mb4_general_ci NOT NULL,
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`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
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PRIMARY KEY (`a`),
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UNIQUE KEY `c` (`c`),
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KEY `d2` (`d`),
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KEY `b` (`b`),
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KEY `d` (`d`)
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) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
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insert into t1 values(6,1,'ggg','ggg');
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select * from t1;
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a b c d
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2 3 ak ak
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3 4 ad ad
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4 4 tr tr
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5 5 oo oo
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6 1 ggg ggg
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select * from t1 force index(b) order by b;
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a b c d
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6 1 ggg ggg
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2 3 ak ak
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3 4 ad ad
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4 4 tr tr
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5 5 oo oo
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select * from t1 force index(c) order by c;
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a b c d
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3 4 ad ad
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2 3 ak ak
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6 1 ggg ggg
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5 5 oo oo
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4 4 tr tr
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select * from t1 force index(d) order by d;
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a b c d
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3 4 ad ad
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2 3 ak ak
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6 1 ggg ggg
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5 5 oo oo
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4 4 tr tr
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analyze table t1;
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explain select * from t1 force index(b) order by b;
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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 index NULL b 5 NULL # 100.00 NULL
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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`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`b`) order by `test`.`t1`.`b`
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explain select * from t1 force index(c) order by c;
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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 index NULL c 40 NULL # 100.00 NULL
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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`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`c`) order by `test`.`t1`.`c`
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explain select * from t1 force index(d) order by d;
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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 index NULL d 83 NULL # 100.00 NULL
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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`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`d`) order by `test`.`t1`.`d`
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) NOT NULL,
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`b` int(11) DEFAULT NULL,
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`c` char(10) COLLATE utf8mb4_general_ci NOT NULL,
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`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
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PRIMARY KEY (`a`),
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UNIQUE KEY `c` (`c`),
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KEY `d2` (`d`),
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KEY `b` (`b`),
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KEY `d` (`d`)
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) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
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drop table t1;
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create table t1(a int not null, b int, c char(10), d varchar(20), primary key (a)) ENGINE=XENGINE;
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insert into t1 values (1,1,'ab','ab'),(2,2,'ac','ac'),(3,3,'ad','ad'),(4,4,'afe','afe');
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commit;
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alter table t1 add index (c(2));
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) NOT NULL,
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`b` int(11) DEFAULT NULL,
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`c` char(10) COLLATE utf8mb4_general_ci DEFAULT NULL,
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`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
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PRIMARY KEY (`a`),
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KEY `c` (`c`(2))
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) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
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affected rows: 1
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alter table t1 add unique index (d(10));
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) NOT NULL,
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`b` int(11) DEFAULT NULL,
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`c` char(10) COLLATE utf8mb4_general_ci DEFAULT NULL,
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`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
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PRIMARY KEY (`a`),
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UNIQUE KEY `d` (`d`(10)),
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KEY `c` (`c`(2))
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) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
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affected rows: 1
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insert into t1 values(5,1,'ggg','ggg');
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analyze table t1;
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select * from t1;
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a b c d
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1 1 ab ab
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2 2 ac ac
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3 3 ad ad
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4 4 afe afe
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5 1 ggg ggg
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select * from t1 force index(c) order by c;
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a b c d
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1 1 ab ab
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2 2 ac ac
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3 3 ad ad
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4 4 afe afe
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5 1 ggg ggg
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select * from t1 force index(d) order by d;
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a b c d
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1 1 ab ab
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2 2 ac ac
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3 3 ad ad
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4 4 afe afe
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5 1 ggg ggg
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explain select * from t1 order by b;
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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 NULL NULL NULL NULL # 100.00 Using filesort
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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`,`test`.`t1`.`d` AS `d` from `test`.`t1` order by `test`.`t1`.`b`
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explain select * from t1 force index(c) order by c;
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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 NULL NULL NULL NULL # 100.00 Using filesort
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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`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`c`) order by `test`.`t1`.`c`
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explain select * from t1 force index(d) order by d;
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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 NULL NULL NULL NULL # 100.00 Using filesort
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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`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`d`) order by `test`.`t1`.`d`
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) NOT NULL,
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`b` int(11) DEFAULT NULL,
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`c` char(10) COLLATE utf8mb4_general_ci DEFAULT NULL,
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`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
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PRIMARY KEY (`a`),
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UNIQUE KEY `d` (`d`(10)),
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KEY `c` (`c`(2))
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) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
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alter table t1 drop index d;
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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insert into t1 values(8,9,'fff','fff');
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select * from t1;
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a b c d
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1 1 ab ab
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2 2 ac ac
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3 3 ad ad
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4 4 afe afe
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5 1 ggg ggg
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8 9 fff fff
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select * from t1 force index(c) order by c;
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a b c d
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1 1 ab ab
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2 2 ac ac
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3 3 ad ad
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4 4 afe afe
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8 9 fff fff
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5 1 ggg ggg
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analyze table t1;
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explain select * from t1 order by b;
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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 NULL NULL NULL NULL # 100.00 Using filesort
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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`,`test`.`t1`.`d` AS `d` from `test`.`t1` order by `test`.`t1`.`b`
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explain select * from t1 force index(c) order by c;
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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 NULL NULL NULL NULL # 100.00 Using filesort
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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`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`c`) order by `test`.`t1`.`c`
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explain select * from t1 order by d;
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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 NULL NULL NULL NULL # 100.00 Using filesort
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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`,`test`.`t1`.`d` AS `d` from `test`.`t1` order by `test`.`t1`.`d`
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) NOT NULL,
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`b` int(11) DEFAULT NULL,
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`c` char(10) COLLATE utf8mb4_general_ci DEFAULT NULL,
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`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
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PRIMARY KEY (`a`),
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KEY `c` (`c`(2))
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) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
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drop table t1;
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create table t1(a int not null, b int, c char(10), d varchar(20), primary key (a)) ENGINE=XENGINE;
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insert into t1 values (1,1,'ab','ab'),(2,2,'ac','ac'),(3,2,'ad','ad'),(4,4,'afe','afe');
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commit;
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alter table t1 add unique index (b,c);
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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insert into t1 values(8,9,'fff','fff');
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select * from t1;
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a b c d
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1 1 ab ab
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2 2 ac ac
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3 2 ad ad
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4 4 afe afe
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8 9 fff fff
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select * from t1 force index(b) order by b;
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a b c d
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1 1 ab ab
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2 2 ac ac
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3 2 ad ad
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4 4 afe afe
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8 9 fff fff
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analyze table t1;
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explain select * from t1 force index(b) order by b;
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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 index NULL b 46 NULL # 100.00 NULL
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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`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`b`) order by `test`.`t1`.`b`
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) NOT NULL,
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`b` int(11) DEFAULT NULL,
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`c` char(10) COLLATE utf8mb4_general_ci DEFAULT NULL,
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`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
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PRIMARY KEY (`a`),
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UNIQUE KEY `b` (`b`,`c`)
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) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
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alter table t1 add index (b,c);
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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insert into t1 values(11,11,'kkk','kkk');
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select * from t1;
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a b c d
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1 1 ab ab
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2 2 ac ac
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3 2 ad ad
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4 4 afe afe
|
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8 9 fff fff
|
|
11 11 kkk kkk
|
|
select * from t1 force index(b) order by b;
|
|
a b c d
|
|
1 1 ab ab
|
|
2 2 ac ac
|
|
3 2 ad ad
|
|
4 4 afe afe
|
|
8 9 fff fff
|
|
11 11 kkk kkk
|
|
analyze table t1;
|
|
explain select * from t1 force index(b) order by b;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL b 46 NULL # 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`b`) order by `test`.`t1`.`b`
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` int(11) DEFAULT NULL,
|
|
`c` char(10) COLLATE utf8mb4_general_ci DEFAULT NULL,
|
|
`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
UNIQUE KEY `b` (`b`,`c`),
|
|
KEY `b_2` (`b`,`c`)
|
|
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
|
|
alter table t1 add unique index (c,d);
|
|
affected rows: 0
|
|
info: Records: 0 Duplicates: 0 Warnings: 0
|
|
insert into t1 values(13,13,'yyy','aaa');
|
|
select * from t1;
|
|
a b c d
|
|
1 1 ab ab
|
|
2 2 ac ac
|
|
3 2 ad ad
|
|
4 4 afe afe
|
|
8 9 fff fff
|
|
11 11 kkk kkk
|
|
13 13 yyy aaa
|
|
select * from t1 force index(b) order by b;
|
|
a b c d
|
|
1 1 ab ab
|
|
2 2 ac ac
|
|
3 2 ad ad
|
|
4 4 afe afe
|
|
8 9 fff fff
|
|
11 11 kkk kkk
|
|
13 13 yyy aaa
|
|
select * from t1 force index(c) order by c;
|
|
a b c d
|
|
1 1 ab ab
|
|
2 2 ac ac
|
|
3 2 ad ad
|
|
4 4 afe afe
|
|
8 9 fff fff
|
|
11 11 kkk kkk
|
|
13 13 yyy aaa
|
|
analyze table t1;
|
|
explain select * from t1 force index(b) order by b;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL b 46 NULL # 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`b`) order by `test`.`t1`.`b`
|
|
explain select * from t1 force index(c) order by c;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL c 124 NULL # 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`c`) order by `test`.`t1`.`c`
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` int(11) DEFAULT NULL,
|
|
`c` char(10) COLLATE utf8mb4_general_ci DEFAULT NULL,
|
|
`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
UNIQUE KEY `b` (`b`,`c`),
|
|
UNIQUE KEY `c` (`c`,`d`),
|
|
KEY `b_2` (`b`,`c`)
|
|
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
|
|
drop table t1;
|
|
create table t1(a int not null, b int, c char(10), d varchar(20), primary key (a))ENGINE=XENGINE default charset=utf8;
|
|
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.
|
|
insert into t1 values (1,1,'ab','ab'),(2,2,'ac','ac'),(3,2,'ad','ad'),(4,4,'afe','afe');
|
|
commit;
|
|
alter table t1 add unique index (b);
|
|
ERROR 23000: Duplicate entry '2' for key 'b'
|
|
insert into t1 values(8,9,'fff','fff');
|
|
select * from t1;
|
|
a b c d
|
|
1 1 ab ab
|
|
2 2 ac ac
|
|
3 2 ad ad
|
|
4 4 afe afe
|
|
8 9 fff fff
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` int(11) DEFAULT NULL,
|
|
`c` char(10) DEFAULT NULL,
|
|
`d` varchar(20) DEFAULT NULL,
|
|
PRIMARY KEY (`a`)
|
|
) ENGINE=XENGINE DEFAULT CHARSET=utf8
|
|
alter table t1 add index (b);
|
|
insert into t1 values(10,10,'kkk','iii');
|
|
select * from t1;
|
|
a b c d
|
|
1 1 ab ab
|
|
2 2 ac ac
|
|
3 2 ad ad
|
|
4 4 afe afe
|
|
8 9 fff fff
|
|
10 10 kkk iii
|
|
select * from t1 force index(b) order by b;
|
|
a b c d
|
|
1 1 ab ab
|
|
2 2 ac ac
|
|
3 2 ad ad
|
|
4 4 afe afe
|
|
8 9 fff fff
|
|
10 10 kkk iii
|
|
explain select * from t1 force index(b) order by b;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL b 5 NULL # 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`b`) order by `test`.`t1`.`b`
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` int(11) DEFAULT NULL,
|
|
`c` char(10) DEFAULT NULL,
|
|
`d` varchar(20) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `b` (`b`)
|
|
) ENGINE=XENGINE DEFAULT CHARSET=utf8
|
|
alter table t1 add unique index (c), add index (d);
|
|
insert into t1 values(11,11,'aaa','mmm');
|
|
select * from t1;
|
|
a b c d
|
|
1 1 ab ab
|
|
2 2 ac ac
|
|
3 2 ad ad
|
|
4 4 afe afe
|
|
8 9 fff fff
|
|
10 10 kkk iii
|
|
11 11 aaa mmm
|
|
select * from t1 force index(b) order by b;
|
|
a b c d
|
|
1 1 ab ab
|
|
2 2 ac ac
|
|
3 2 ad ad
|
|
4 4 afe afe
|
|
8 9 fff fff
|
|
10 10 kkk iii
|
|
11 11 aaa mmm
|
|
select * from t1 force index(c) order by c;
|
|
a b c d
|
|
11 11 aaa mmm
|
|
1 1 ab ab
|
|
2 2 ac ac
|
|
3 2 ad ad
|
|
4 4 afe afe
|
|
8 9 fff fff
|
|
10 10 kkk iii
|
|
select * from t1 force index(d) order by d;
|
|
a b c d
|
|
1 1 ab ab
|
|
2 2 ac ac
|
|
3 2 ad ad
|
|
4 4 afe afe
|
|
8 9 fff fff
|
|
10 10 kkk iii
|
|
11 11 aaa mmm
|
|
explain select * from t1 force index(b) order by b;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL b 5 NULL # 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`b`) order by `test`.`t1`.`b`
|
|
explain select * from t1 force index(c) order by c;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL c 31 NULL # 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`c`) order by `test`.`t1`.`c`
|
|
explain select * from t1 force index(d) order by d;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL d 63 NULL # 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c`,`test`.`t1`.`d` AS `d` from `test`.`t1` FORCE INDEX (`d`) order by `test`.`t1`.`d`
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` int(11) DEFAULT NULL,
|
|
`c` char(10) DEFAULT NULL,
|
|
`d` varchar(20) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
UNIQUE KEY `c` (`c`),
|
|
KEY `b` (`b`),
|
|
KEY `d` (`d`)
|
|
) ENGINE=XENGINE DEFAULT CHARSET=utf8
|
|
check table t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 check status OK
|
|
drop table t1;
|
|
create table t1(a int not null, b int) ENGINE=XENGINE;
|
|
insert into t1 values (1,1),(1,1),(1,1),(1,1);
|
|
alter table t1 add unique index (a);
|
|
ERROR 23000: Duplicate entry '1' for key 'a'
|
|
alter table t1 add unique index (b);
|
|
ERROR 23000: Duplicate entry '1' for key 'b'
|
|
alter table t1 add unique index (a), add unique index(b);
|
|
ERROR 23000: Duplicate entry '1' for key 'a'
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` int(11) DEFAULT NULL
|
|
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
|
|
drop table t1;
|
|
create table t1(a int not null, c int not null,b int, primary key(a), unique key(c), key(b)) ENGINE=XENGINE;
|
|
alter table t1 drop index c, drop index b;
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`c` int(11) NOT NULL,
|
|
`b` int(11) DEFAULT NULL,
|
|
PRIMARY KEY (`a`)
|
|
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
|
|
drop table t1;
|
|
create table t1(a int not null, b int, primary key(a)) ENGINE=XENGINE;
|
|
alter table t1 add index (b);
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` int(11) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
KEY `b` (`b`)
|
|
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
|
|
drop table t1;
|
|
create table t1(a int not null, b int, c char(10), d varchar(20), primary key (a)) ENGINE=XENGINE;
|
|
insert into t1 values (1,1,'ab','ab'),(2,2,'ac','ac'),(3,3,'ac','ac'),(4,4,'afe','afe'),(5,4,'affe','affe');
|
|
alter table t1 add unique index (b), add unique index (c), add unique index (d);
|
|
ERROR 23000: Duplicate entry 'ac' for key 'd'
|
|
alter table t1 add unique index (c), add unique index (b), add index (d);
|
|
ERROR 23000: Duplicate entry '4' for key 'b'
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` int(11) DEFAULT NULL,
|
|
`c` char(10) COLLATE utf8mb4_general_ci DEFAULT NULL,
|
|
`d` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
|
|
PRIMARY KEY (`a`)
|
|
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
|
|
drop table t1;
|
|
create table t1(a int not null, b int not null, c int, primary key (a), key(c)) ENGINE=XENGINE;
|
|
insert into t1 values (5,1,5),(4,2,4),(3,3,3),(2,4,2),(1,5,1);
|
|
alter table t1 add unique index (b);
|
|
affected rows: 0
|
|
info: Records: 0 Duplicates: 0 Warnings: 0
|
|
insert into t1 values (10,20,20),(11,19,19),(12,18,18),(13,17,17);
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` int(11) NOT NULL,
|
|
`c` int(11) DEFAULT NULL,
|
|
PRIMARY KEY (`a`),
|
|
UNIQUE KEY `b` (`b`),
|
|
KEY `c` (`c`)
|
|
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
|
|
check table t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 check status OK
|
|
analyze table t1;
|
|
explain select * from t1 force index(c) order by c;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL c 5 NULL # 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` FORCE INDEX (`c`) order by `test`.`t1`.`c`
|
|
explain select * from t1 order by a;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL PRIMARY 4 NULL # 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` order by `test`.`t1`.`a`
|
|
explain select * from t1 force index(b) order by b;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL b 4 NULL # 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` FORCE INDEX (`b`) order by `test`.`t1`.`b`
|
|
select * from t1 order by a;
|
|
a b c
|
|
1 5 1
|
|
2 4 2
|
|
3 3 3
|
|
4 2 4
|
|
5 1 5
|
|
10 20 20
|
|
11 19 19
|
|
12 18 18
|
|
13 17 17
|
|
select * from t1 force index(b) order by b;
|
|
a b c
|
|
5 1 5
|
|
4 2 4
|
|
3 3 3
|
|
2 4 2
|
|
1 5 1
|
|
13 17 17
|
|
12 18 18
|
|
11 19 19
|
|
10 20 20
|
|
select * from t1 force index(c) order by c;
|
|
a b c
|
|
1 5 1
|
|
2 4 2
|
|
3 3 3
|
|
4 2 4
|
|
5 1 5
|
|
13 17 17
|
|
12 18 18
|
|
11 19 19
|
|
10 20 20
|
|
drop table t1;
|
|
create table t1(a int not null, b int not null) ENGINE=XENGINE;
|
|
insert into t1 values (1,1);
|
|
alter table t1 add primary key(b);
|
|
affected rows: 0
|
|
info: Records: 0 Duplicates: 0 Warnings: 0
|
|
insert into t1 values (2,2);
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` int(11) NOT NULL,
|
|
PRIMARY KEY (`b`)
|
|
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
|
|
check table t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 check status OK
|
|
select * from t1;
|
|
a b
|
|
1 1
|
|
2 2
|
|
analyze table t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status OK
|
|
explain select * from t1;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL # 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`
|
|
explain select * from t1 order by a;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL # 100.00 Using filesort
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` order by `test`.`t1`.`a`
|
|
explain select * from t1 order by b;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL PRIMARY 4 NULL # 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` order by `test`.`t1`.`b`
|
|
checksum table t1;
|
|
Table Checksum
|
|
test.t1 582702641
|
|
drop table t1;
|
|
create table t1(a int not null) ENGINE=XENGINE;
|
|
insert into t1 values (1);
|
|
alter table t1 add primary key(a);
|
|
affected rows: 0
|
|
info: Records: 0 Duplicates: 0 Warnings: 0
|
|
insert into t1 values (2);
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
PRIMARY KEY (`a`)
|
|
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
|
|
check table t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 check status OK
|
|
commit;
|
|
select * from t1;
|
|
a
|
|
1
|
|
2
|
|
analyze table t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status OK
|
|
explain select * from t1;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL PRIMARY 4 NULL # 100.00 Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1`
|
|
explain select * from t1 order by a;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL PRIMARY 4 NULL # 100.00 Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` order by `test`.`t1`.`a`
|
|
drop table t1;
|
|
create table t480(a serial)engine=xengine;
|
|
insert into t480
|
|
values(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),
|
|
(),(),(),(),(),(),(),();
|
|
insert into t480 select 0 from t480;
|
|
insert into t480 select 0 from t480;
|
|
insert into t480 select 0 from t480;
|
|
insert into t480 select 0 from t480;
|
|
# Bug#19163915 INNODB: DUPLICATE RECORDS COULD EXIST
|
|
# WHEN SKIPPING SORT FOR CLUSTER INDEX
|
|
SELECT @@innodb_sort_buffer_size;
|
|
@@innodb_sort_buffer_size
|
|
1048576
|
|
create table t1(f1 int auto_increment not null,
|
|
f2 char(200) not null, f3 char(200) not null,
|
|
f4 char(200) not null,primary key(f1,f2,f3,f4)) charset latin1;
|
|
insert into t1 select NULL,'aaa','bbb','ccc' from t480;
|
|
insert into t1 values(106, 'aaa','bbb','cccc');
|
|
select count(*) from t1;
|
|
count(*)
|
|
481
|
|
# Skip sort
|
|
# Change PK from (f1,f2,f3,f4) to (f1,f2,f3)
|
|
alter table t1 drop primary key, add primary key(f1,f2,f3);
|
|
ERROR 23000: Duplicate entry '106-aaa-bbb' for key 'PRIMARY'
|
|
select count(*) from t1;
|
|
count(*)
|
|
481
|
|
drop table t1;
|
|
create table t1(f1 int auto_increment not null,
|
|
f2 char(200) not null, f3 char(200) not null,
|
|
f4 char(200) not null,primary key(f1,f2,f3,f4)) charset latin1;
|
|
insert into t1 select NULL,'aaa','bbb','ccc' from t480;
|
|
insert into t1 values(108,'aaa','bbb','cccc');
|
|
select count(*) from t1;
|
|
count(*)
|
|
481
|
|
alter table t1 drop primary key, add primary key(f1,f2,f3);
|
|
ERROR 23000: Duplicate entry '108-aaa-bbb' for key 'PRIMARY'
|
|
select count(*) from t1;
|
|
count(*)
|
|
481
|
|
drop table t1, t480;
|
|
#
|
|
# Bug #19896922 SORTING SKIPPED WHEN PREFIX LENGTH OF THE PK
|
|
# FIELD IS CHANGED
|
|
#
|
|
create table t1(a int not null, b varchar(30) not null,
|
|
primary key (b(10), a)) ENGINE=XENGINE;
|
|
insert into t1 values(0,'khdHps6UxW8Lwaoxa604oK6zkb'),(1,'khdHps6UxW8L');
|
|
select * from t1;
|
|
a b
|
|
0 khdHps6UxW8Lwaoxa604oK6zkb
|
|
1 khdHps6UxW8L
|
|
alter table t1 drop primary key, add primary key (b(18),a);
|
|
select * from t1;
|
|
a b
|
|
1 khdHps6UxW8L
|
|
0 khdHps6UxW8Lwaoxa604oK6zkb
|
|
drop table t1;
|
|
create table t1(a int not null, b varchar(30) not null,
|
|
primary key (b(10), a)) ENGINE=XENGINE;
|
|
insert into t1 values(0,'khdHps6UxW8Lwaoxa604oK6zkb'),(1,'khdHps6UtW8L');
|
|
select * from t1;
|
|
a b
|
|
1 khdHps6UtW8L
|
|
0 khdHps6UxW8Lwaoxa604oK6zkb
|
|
alter table t1 drop primary key, add primary key (b(8),a);
|
|
select * from t1;
|
|
a b
|
|
0 khdHps6UxW8Lwaoxa604oK6zkb
|
|
1 khdHps6UtW8L
|
|
drop table t1;
|
|
#
|
|
# Bug #21103101 SORTING SKIPPED WHEN DROPPING THE SINGLE
|
|
# COLUMN PRIMARY KEY
|
|
#
|
|
create table t1(f1 int not null, f2 int not null,
|
|
primary key (f1), unique key(f1, f2))ENGINE=XENGINE;
|
|
insert into t1 values(1,3), (2,2);
|
|
alter table t1 drop column f1;
|
|
drop table t1;
|
|
create table t1(f1 int not null, f2 int not null,
|
|
primary key (f1), unique key(f1, f2))ENGINE=XENGINE;
|
|
insert into t1 values(1,3), (2,2);
|
|
alter table t1 drop primary key, lock=none;
|
|
ERROR 0A000: LOCK=NONE is not supported. Reason: With INPLACE DDL, XEngine only allows that DROP PRIMARY KEY is combined with ADD PRIMARY KEY. Try LOCK=SHARED.
|
|
drop table t1;
|
|
#
|
|
# BUG#21612714 ALTER TABLE SORTING SKIPPED WHEN CHANGE PK AND DROP
|
|
# LAST COLUMN OF OLD PK
|
|
#
|
|
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(1,2,1);
|
|
alter table t1 drop primary key, add primary key(o1,o3), drop o2, lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(1,2,1);
|
|
alter table t1 drop o1, drop o2, add primary key(o3), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(1,2,1);
|
|
alter table t1 drop primary key, add primary key(o1,o3), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(1,2,1);
|
|
alter table t1 drop primary key, add primary key(o3), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(1,2,1);
|
|
alter table t1 add column n1 int not null, drop primary key, add primary key(n1,o3), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(2,2,1);
|
|
alter table t1 add column n1 int not null, drop primary key, add primary key(o3,n1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values(1,2,2),(2,1,1);
|
|
alter table t1 drop primary key, add primary key(o2, o1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values(1,2,2),(2,1,1);
|
|
alter table t1 drop primary key, add primary key(o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values(1,2,2),(2,1,1);
|
|
alter table t1 drop primary key, add primary key(o2,o3), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int not null, primary key(o2,o1)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(2,1,1);
|
|
alter table t1 drop primary key, add primary key(o2,o3), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(1,2,1);
|
|
alter table t1 drop primary key, add primary key(o1,o3,o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values(1,2,2),(2,1,1);
|
|
alter table t1 drop primary key, add primary key(o3,o1,o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(1,2,1);
|
|
alter table t1 drop primary key, add primary key(o1,o3), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) ENGINE=XENGINE;
|
|
insert into t1 values(1,2,2),(2,1,1);
|
|
alter table t1 drop o1, lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(1,2,1);
|
|
alter table t1 drop o2, lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) ENGINE=XENGINE;
|
|
insert into t1 values(1,2,2),(2,1,1);
|
|
alter table t1 drop o1, drop o2, lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1(2), o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1, 1), ('abc', 2, 2);
|
|
alter table t1 drop primary key, add primary key(o1(3), o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1(2), o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1, 1), ('abc', 2, 2);
|
|
alter table t1 drop primary key, add primary key(o1, o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1(2), o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1, 1), ('abc', 2, 2);
|
|
alter table t1 drop primary key, add primary key(o1(3), o3), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1(2), o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1, 1), ('abc', 2, 2);
|
|
alter table t1 drop primary key, add primary key(o1, o3), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1(3), o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abc', 2, 1), ('abd', 1, 2);
|
|
alter table t1 drop primary key, add primary key(o1(2), o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1, o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abc', 2, 1), ('abd', 1, 2);
|
|
alter table t1 drop primary key, add primary key(o1(2), o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1(3), o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abc', 2, 2), ('abd', 1, 1);
|
|
alter table t1 drop primary key, add primary key(o1(2), o3), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1, o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abc', 2, 2), ('abd', 1, 1);
|
|
alter table t1 drop primary key, add primary key(o1(2), o3), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 varchar(10), o3 int, primary key(o1,o2(2),o3)) ENGINE=XENGINE;
|
|
insert into t1 values(1, 'abd', 1), (1, 'abc', 2);
|
|
alter table t1 drop primary key, add primary key(o1,o2(3)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 varchar(10), o3 int, primary key(o1,o2(2),o3)) ENGINE=XENGINE;
|
|
insert into t1 values(1, 'abd', 1), (1, 'abc', 2);
|
|
alter table t1 drop primary key, add primary key(o1,o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1(3),o2(3))) ENGINE=XENGINE;
|
|
insert into t1 values('abc', 'acd'), ('abd', 'abd');
|
|
alter table t1 drop primary key, add primary key(o1(2),o2(3)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abc', 'acd'), ('abd', 'abd');
|
|
alter table t1 drop primary key, add primary key(o1(2),o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1(3),o2(3))) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 'acd'), ('acd', 'abd');
|
|
alter table t1 drop primary key, add primary key(o2(3),o1(3)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 'acd'), ('acd', 'abd');
|
|
alter table t1 drop primary key, add primary key(o2,o1), lock=none;
|
|
drop table t1;
|
|
CREATE TABLE t1(a INT NOT NULL, b INT, PRIMARY KEY (a ASC)) ENGINE=XENGINE;
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL,
|
|
`b` int(11) DEFAULT NULL,
|
|
PRIMARY KEY (`a`)
|
|
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
|
|
INSERT INTO t1 VALUES(5,5), (4,4), (3,4), (2,3);
|
|
ALTER TABLE t1 DROP PRIMARY KEY, ADD PRIMARY KEY (a DESC);
|
|
ERROR 42000: The storage engine for the table doesn't support descending indexes
|
|
ALTER TABLE t1 DROP PRIMARY KEY, ADD PRIMARY KEY (a ASC);
|
|
CHECK TABLE t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 check status OK
|
|
SELECT * FROM t1;
|
|
a b
|
|
2 3
|
|
3 4
|
|
4 4
|
|
5 5
|
|
DROP TABLE t1;
|
|
create table t1(o1 varchar(10), primary key(o1(2))) ENGINE=XENGINE;
|
|
insert into t1 values('abd'), ('acd');
|
|
alter table t1 drop primary key, add primary key(o1(3)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), primary key(o1(2))) ENGINE=XENGINE;
|
|
insert into t1 values('abd'), ('acd');
|
|
alter table t1 drop primary key, add primary key(o1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), primary key(o1(2))) ENGINE=XENGINE;
|
|
insert into t1 values('abd'), ('acd');
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1(3), n1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), primary key(o1(2))) ENGINE=XENGINE;
|
|
insert into t1 values('abd'), ('acd');
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1, n1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int not null, primary key(o1(2))) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1), ('acd', 2);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1(3), o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int not null, primary key(o1(2))) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1), ('acd', 2);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1, o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), primary key(o1(3))) ENGINE=XENGINE;
|
|
insert into t1 values('abd'), ('acd');
|
|
alter table t1 drop primary key, add primary key(o1(2)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), primary key(o1)) ENGINE=XENGINE;
|
|
insert into t1 values('abd'), ('acd');
|
|
alter table t1 drop primary key, add primary key(o1(2)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, primary key(o1(3), o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1), ('acd', 2);
|
|
alter table t1 drop primary key, add primary key(o1(2)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, primary key(o1, o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1), ('acd', 2);
|
|
alter table t1 drop primary key, add primary key(o1(2)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, primary key(o1(3), o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1), ('acd', 2);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1(2),n1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, primary key(o1, o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1), ('acd', 2);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1(2),n1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, primary key(o1(3), o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1), ('acd', 2);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1(3),n1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, primary key(o1, o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1), ('acd', 2);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1,n1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 varchar(10), primary key(o1,o2(3))) ENGINE=XENGINE;
|
|
insert into t1 values(1,'abd'), (2,'acd');
|
|
alter table t1 drop primary key, add primary key(o1,o2(2)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 varchar(10), primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values(1,'abd'), (2,'acd');
|
|
alter table t1 drop primary key, add primary key(o1,o2(2)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 varchar(10), primary key(o1,o2(2))) ENGINE=XENGINE;
|
|
insert into t1 values(1, 'abd'), (2, 'acd');
|
|
alter table t1 drop primary key, add primary key(o1,o2(3)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 varchar(10), primary key(o1,o2(2))) ENGINE=XENGINE;
|
|
insert into t1 values(1, 'abd'), (2, 'acd');
|
|
alter table t1 drop primary key, add primary key(o1,o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 varchar(10), o3 int, primary key(o1,o2(3),o3)) ENGINE=XENGINE;
|
|
insert into t1 values(1, 'abd', 1), (2, 'acd', 2);
|
|
alter table t1 drop primary key, add primary key(o1,o2(2)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 varchar(10), o3 int, primary key(o1,o2,o3)) ENGINE=XENGINE;
|
|
insert into t1 values(1, 'abd', 1), (2, 'acd', 2);
|
|
alter table t1 drop primary key, add primary key(o1,o2(2)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1(3),o2(3))) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 'acd'), ('acd', 'abd');
|
|
alter table t1 drop primary key, add primary key(o1(3),o2(2)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1,o2)) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 'acd'), ('acd', 'abd');
|
|
alter table t1 drop primary key, add primary key(o1,o2(2)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1(3),o2(2))) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 'acd'), ('acd', 'abd');
|
|
alter table t1 drop primary key, add primary key(o1(3),o2(3)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1,o2(2))) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 'acd'), ('acd', 'abd');
|
|
alter table t1 drop primary key, add primary key(o1,o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, o3 varchar(10), primary key(o1(3),o2,o3(2))) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1, 'acd'), ('acd', 2, 'abd');
|
|
alter table t1 drop primary key, add primary key(o1(3),o2,o3(3)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, o3 varchar(10), primary key(o1,o2,o3(2))) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1, 'acd'), ('acd', 2, 'abd');
|
|
alter table t1 drop primary key, add primary key(o1,o2,o3), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, o3 varchar(10), primary key(o1(3),o2,o3(3))) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1, 'acd'), ('acd', 2, 'abd');
|
|
alter table t1 drop primary key, add primary key(o1(3),o2,o3(2)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 varchar(10), o2 int, o3 varchar(10), primary key(o1,o2,o3(3))) ENGINE=XENGINE;
|
|
insert into t1 values('abd', 1, 'acd'), ('acd', 2, 'abd');
|
|
alter table t1 drop primary key, add primary key(o1,o2,o3(2)), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int not null, primary key(o1)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1),(2,2);
|
|
alter table t1 drop primary key, add primary key(o1,o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int not null, primary key(o1)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1),(2,2);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1,n1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int not null, primary key(o1)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1),(2,2);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(n1,o1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int not null, primary key(o1)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1),(2,2);
|
|
alter table t1 add n1 int not null, add n2 int not null, drop primary key, add primary key(n1,o1,n2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int not null, primary key(o1)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1),(2,2);
|
|
alter table t1 add n1 int not null, add n2 int not null, drop primary key, add primary key(n1,n2,o1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int not null, primary key(o1)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1),(2,2);
|
|
alter table t1 add n1 int not null, add n2 int not null, drop primary key, add primary key(o1,n1,n2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int not null, primary key(o1)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1),(2,2);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1,o2,n1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int not null, primary key(o1)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1),(2,2);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1,n1,o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int not null, primary key(o1)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1),(2,2);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(n1,o1,o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int not null, o3 int not null, primary key(o1)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(2,2,1);
|
|
alter table t1 drop primary key, add primary key(o1,o2,o3), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int not null, o3 int not null, primary key(o1)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(2,2,1);
|
|
alter table t1 drop primary key, add primary key(o1,o3,o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(2,2,1);
|
|
alter table t1 drop primary key, add primary key(o1,o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int, o4 int not null, primary key(o1,o2,o3)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2,2),(2,2,1,1);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1,o2,o3,o4), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(2,2,1);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1,o2,n1), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(2,2,1);
|
|
alter table t1 add n1 int not null, drop primary key, add primary key(o1,n1,o2), lock=none;
|
|
drop table t1;
|
|
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) ENGINE=XENGINE;
|
|
insert into t1 values(1,1,2),(2,2,1);
|
|
alter table t1 drop primary key, add primary key(o1), lock=none;
|
|
drop table t1;
|
|
CREATE TABLE t1(o1 int, o2 int, o3 int, PRIMARY KEY(o1), KEY(o2)) ENGINE=XENGINE;
|
|
INSERT INTO t1 VALUES(1,1,2),(2,2,1);
|
|
EXPLAIN SELECT * FROM t1 ORDER BY o2;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL # 100.00 Using filesort
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`o1` AS `o1`,`test`.`t1`.`o2` AS `o2`,`test`.`t1`.`o3` AS `o3` from `test`.`t1` order by `test`.`t1`.`o2`
|
|
SELECT * FROM t1 ORDER BY o2;
|
|
o1 o2 o3
|
|
1 1 2
|
|
2 2 1
|
|
CHECK TABLE t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 check status OK
|
|
SELECT * FROM t1;
|
|
o1 o2 o3
|
|
1 1 2
|
|
2 2 1
|
|
EXPLAIN SELECT * FROM t1 ORDER BY o2;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL # 100.00 Using filesort
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`o1` AS `o1`,`test`.`t1`.`o2` AS `o2`,`test`.`t1`.`o3` AS `o3` from `test`.`t1` order by `test`.`t1`.`o2`
|
|
SELECT * FROM t1 ORDER BY o2;
|
|
o1 o2 o3
|
|
1 1 2
|
|
2 2 1
|
|
ALTER TABLE t1 DROP INDEX o2, ADD INDEX (o2 ASC);
|
|
CHECK TABLE t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 check status OK
|
|
SELECT * FROM t1;
|
|
o1 o2 o3
|
|
1 1 2
|
|
2 2 1
|
|
EXPLAIN SELECT * FROM t1 ORDER BY o2;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL # 100.00 Using filesort
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`o1` AS `o1`,`test`.`t1`.`o2` AS `o2`,`test`.`t1`.`o3` AS `o3` from `test`.`t1` order by `test`.`t1`.`o2`
|
|
SELECT * FROM t1 ORDER BY o2;
|
|
o1 o2 o3
|
|
1 1 2
|
|
2 2 1
|
|
DROP TABLE t1;
|