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109 lines
2.1 KiB
Text
109 lines
2.1 KiB
Text
create table t1 (a tinyint unsigned 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` tinyint(3) unsigned 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 (255), (254), (253), (252), (1), (2), (128);
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select * from t1;
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a
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1
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128
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2
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252
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253
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254
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255
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select * from t1 where a=253;
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a
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253
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delete from t1 where a=253;
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select * from t1;
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a
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1
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128
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2
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252
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254
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255
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drop table t1;
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create table t2 (a tinyint unsigned not null, primary key(a)) engine='MYISAM'
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partition by key (a) partitions 8;
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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` tinyint(3) unsigned 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 8
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insert into t2 values (255), (254), (253), (252);
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select * from t2;
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a
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252
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253
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254
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255
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select * from t2 where a=253;
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a
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253
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delete from t2 where a=253;
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select * from t2;
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a
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252
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254
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255
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delete from t2;
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255 inserts;
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select count(*) from t2;
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count(*)
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255
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drop table t2;
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create table t3 (a tinyint not null, primary key(a)) engine='MYISAM'
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partition by key (a) partitions 7;
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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` tinyint(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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PARTITIONS 7
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insert into t3 values (127), (126), (125), (124), (-128), (-127), (1), (-1), (0);
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select * from t3;
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a
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-1
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-127
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-128
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0
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1
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124
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125
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126
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127
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select * from t3 where a=125;
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a
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125
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delete from t3 where a=125;
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select * from t3;
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a
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-1
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-127
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-128
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0
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1
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124
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126
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127
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drop table t3;
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