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142 lines
3.8 KiB
Text
142 lines
3.8 KiB
Text
create table t1 (a decimal(10,4) not null, primary key(a)) engine='MYISAM'
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partition by key (a) (
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partition pa1 max_rows=20 min_rows=2,
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partition pa2 max_rows=30 min_rows=3,
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partition pa3 max_rows=30 min_rows=4,
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partition pa4 max_rows=40 min_rows=2);
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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` decimal(10,4) NOT NULL,
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PRIMARY KEY (`a`)
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) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
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PARTITION BY KEY (`a`)
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(PARTITION `pa1` MAX_ROWS = 20 MIN_ROWS = 2 ENGINE = MyISAM,
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PARTITION `pa2` MAX_ROWS = 30 MIN_ROWS = 3 ENGINE = MyISAM,
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PARTITION `pa3` MAX_ROWS = 30 MIN_ROWS = 4 ENGINE = MyISAM,
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PARTITION `pa4` MAX_ROWS = 40 MIN_ROWS = 2 ENGINE = MyISAM)
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insert into t1 values (999999.9999), (-999999.9999), (123456.7899), (-123456.7899), (-1.5), (1), (0), (-1), (1.5), (1234.567), (-1234.567);
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select * from t1;
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a
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-1.0000
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-1.5000
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-1234.5670
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-123456.7899
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-999999.9999
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0.0000
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1.0000
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1.5000
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1234.5670
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123456.7899
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999999.9999
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select * from t1 where a=1234.567;
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a
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1234.5670
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delete from t1 where a=1234.567;
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select * from t1;
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a
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-1.0000
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-1.5000
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-1234.5670
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-123456.7899
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-999999.9999
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0.0000
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1.0000
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1.5000
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123456.7899
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999999.9999
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drop table t1;
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create table t2 (a decimal(18,9) not null, primary key(a)) engine='MYISAM'
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partition by key (a) partitions 10;
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show create table t2;
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Table Create Table
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t2 CREATE TABLE `t2` (
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`a` decimal(18,9) NOT NULL,
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PRIMARY KEY (`a`)
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) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
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PARTITION BY KEY (`a`)
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PARTITIONS 10
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insert into t2 values (999999999.999999999), (-999999999.999999999), (-1.5), (-1), (0), (1.5), (1234.567), (-1234.567);
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select * from t2;
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a
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-1.000000000
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-1.500000000
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-1234.567000000
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-999999999.999999999
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0.000000000
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1.500000000
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1234.567000000
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999999999.999999999
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select * from t2 where a=1234.567;
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a
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1234.567000000
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delete from t2 where a=1234.567;
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select * from t2;
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a
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-1.000000000
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-1.500000000
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-1234.567000000
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-999999999.999999999
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0.000000000
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1.500000000
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999999999.999999999
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delete from t2;
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65535*3 inserts;
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select count(*) from t2;
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count(*)
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196605
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drop table t2;
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create table t3 (a decimal(18,9) not null, primary key(a)) engine='MYISAM'
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partition by range (floor(a)) subpartition by key (a) subpartitions 2 (
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partition pa2 values less than (2),
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partition pa4 values less than (4),
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partition pa6 values less than (6),
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partition pa8 values less than (8),
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partition pa10 values less than (10)
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);
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show create table t3;
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Table Create Table
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t3 CREATE TABLE `t3` (
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`a` decimal(18,9) NOT NULL,
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PRIMARY KEY (`a`)
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) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
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PARTITION BY RANGE (floor(`a`))
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SUBPARTITION BY KEY (`a`)
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SUBPARTITIONS 2
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(PARTITION `pa2` VALUES LESS THAN (2) ENGINE = MyISAM,
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PARTITION `pa4` VALUES LESS THAN (4) ENGINE = MyISAM,
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PARTITION `pa6` VALUES LESS THAN (6) ENGINE = MyISAM,
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PARTITION `pa8` VALUES LESS THAN (8) ENGINE = MyISAM,
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PARTITION `pa10` VALUES LESS THAN (10) ENGINE = MyISAM)
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9*3 inserts;
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select count(*) from t3;
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count(*)
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27
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drop table t3;
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create table t4 (a decimal(18,9) not null, primary key(a)) engine='MYISAM'
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partition by list (ceiling(a)) subpartition by key (a) subpartitions 2 (
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partition pa2 values in (1,2),
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partition pa4 values in (3,4),
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partition pa6 values in (5,6),
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partition pa8 values in (7,8),
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partition pa10 values in (9,10)
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);
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show create table t4;
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Table Create Table
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t4 CREATE TABLE `t4` (
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`a` decimal(18,9) NOT NULL,
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PRIMARY KEY (`a`)
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) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
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PARTITION BY LIST (ceiling(`a`))
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SUBPARTITION BY KEY (`a`)
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SUBPARTITIONS 2
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(PARTITION `pa2` VALUES IN (1,2) ENGINE = MyISAM,
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PARTITION `pa4` VALUES IN (3,4) ENGINE = MyISAM,
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PARTITION `pa6` VALUES IN (5,6) ENGINE = MyISAM,
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PARTITION `pa8` VALUES IN (7,8) ENGINE = MyISAM,
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PARTITION `pa10` VALUES IN (9,10) ENGINE = MyISAM)
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9*3 inserts;
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select count(*) from t4;
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count(*)
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27
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drop table t4;
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