mirror of
				https://github.com/MariaDB/server.git
				synced 2025-10-31 10:56:12 +01:00 
			
		
		
		
	
		
			
				
	
	
		
			90 lines
		
	
	
	
		
			1.8 KiB
		
	
	
	
		
			Text
		
	
	
	
	
	
			
		
		
	
	
			90 lines
		
	
	
	
		
			1.8 KiB
		
	
	
	
		
			Text
		
	
	
	
	
	
| create table t1 (a float not null, primary key(a)) engine='MYISAM' 
 | |
| partition by key (a) (
 | |
| partition pa1 max_rows=20 min_rows=2,
 | |
| partition pa2 max_rows=30 min_rows=3,
 | |
| partition pa3 max_rows=30 min_rows=4,
 | |
| partition pa4 max_rows=40 min_rows=2);
 | |
| show create table t1;
 | |
| Table	Create Table
 | |
| t1	CREATE TABLE `t1` (
 | |
|   `a` float NOT NULL,
 | |
|   PRIMARY KEY (`a`)
 | |
| ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 | |
|  PARTITION BY KEY (`a`)
 | |
| (PARTITION `pa1` MAX_ROWS = 20 MIN_ROWS = 2 ENGINE = MyISAM,
 | |
|  PARTITION `pa2` MAX_ROWS = 30 MIN_ROWS = 3 ENGINE = MyISAM,
 | |
|  PARTITION `pa3` MAX_ROWS = 30 MIN_ROWS = 4 ENGINE = MyISAM,
 | |
|  PARTITION `pa4` MAX_ROWS = 40 MIN_ROWS = 2 ENGINE = MyISAM)
 | |
| insert into t1 values (-3.402823466E+38), (3.402823466E+38), (-1.5), (-1), (0), (1), (1.5);
 | |
| select * from t1;
 | |
| a
 | |
| -3.40282e38
 | |
| -1.5
 | |
| -1
 | |
| 0
 | |
| 1
 | |
| 1.5
 | |
| 3.40282e38
 | |
| select * from t1 where a=1.5;
 | |
| a
 | |
| 1.5
 | |
| delete from t1 where a=1.5;
 | |
| select * from t1;
 | |
| a
 | |
| -3.40282e38
 | |
| -1.5
 | |
| -1
 | |
| 0
 | |
| 1
 | |
| 3.40282e38
 | |
| drop table t1;
 | |
| create table t2 (a float not null, primary key(a)) engine='MYISAM' 
 | |
| partition by key (a) partitions 10;
 | |
| show create table t2;
 | |
| Table	Create Table
 | |
| t2	CREATE TABLE `t2` (
 | |
|   `a` float NOT NULL,
 | |
|   PRIMARY KEY (`a`)
 | |
| ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 | |
|  PARTITION BY KEY (`a`)
 | |
| PARTITIONS 10
 | |
| insert into t2 values (-3.402823466E+38), (-3.402823466E+37), (-123.456), (0), (1234546.789), (123.456), (1.5);
 | |
| select * from t2;
 | |
| a
 | |
| -3.40282e38
 | |
| -3.40282e37
 | |
| -123.456
 | |
| 0
 | |
| 1.5
 | |
| 123.456
 | |
| 1234550
 | |
| select * from t2 where a=123.456;
 | |
| a
 | |
| delete from t2 where a=123.456;
 | |
| select * from t2;
 | |
| a
 | |
| -3.40282e38
 | |
| -3.40282e37
 | |
| -123.456
 | |
| 0
 | |
| 1.5
 | |
| 123.456
 | |
| 1234550
 | |
| select * from t2 where a=1.5;
 | |
| a
 | |
| 1.5
 | |
| delete from t2 where a=1.5;
 | |
| select * from t2;
 | |
| a
 | |
| -3.40282e38
 | |
| -3.40282e37
 | |
| -123.456
 | |
| 0
 | |
| 123.456
 | |
| 1234550
 | |
| delete from t2;
 | |
| 16384*3 inserts;
 | |
| select count(*) from t2;
 | |
| count(*)
 | |
| 49152
 | |
| drop table t2;
 | 
