mysql 分區 1526錯誤

mysql 分區  

 原文：http://fyzjhh.blog.163.com/blog/static/1694442262012544429953/

 

參考：https://bugs.mysql.com/bug.php?id=52815

簡而言之就是你建的表分區最大值不夠用了

 

 

 
如果表有主鍵， 那么主鍵必須包含分區鍵，分區鍵是主鍵的子集。這個應該算是局限了。

這個是正確的

 CREATE TABLE IF NOT EXISTS `test_hash_part41` (  
  `id` int(11) NOT NULL  ,  
  `pid` int(11) NOT NULL  ,  
  `comment` varchar(1000) NOT NULL DEFAULT '' ,  
  `ip` varchar(25) NOT NULL DEFAULT '' ,  
  PRIMARY KEY (`id`,pid)  
) ENGINE=INNODB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1  
PARTITION BY KEY(id)  
PARTITIONS 3;  

 

下面這個會 ERROR 1503 (HY000): A PRIMARY KEY must include all columns in the table's partitioning function
 

CREATE TABLE IF NOT EXISTS `test_hash_part42` (  
  `id` int(11) NOT NULL  ,  
  `pid` int(11) NOT NULL  ,  
  `comment` varchar(1000) NOT NULL DEFAULT '' ,  
  `ip` varchar(25) NOT NULL DEFAULT '' ,  
  PRIMARY KEY (`id`)  
) ENGINE=INNODB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1  
PARTITION BY KEY(id,pid)  
PARTITIONS 3; 

 

分區的sql語法

partition_options:
    PARTITION BY
        { [LINEAR] HASH(expr)
        | [LINEAR] KEY(column_list)
        | RANGE(expr)
        | LIST(expr) }
    [PARTITIONS num]
    [SUBPARTITION BY
        { [LINEAR] HASH(expr)
        | [LINEAR] KEY(column_list) }
      [SUBPARTITIONS num]
    ]
    [(partition_definition [, partition_definition] ...)]

partition_definition:
    PARTITION partition_name
        [VALUES {LESS THAN {(expr) | MAXVALUE} | IN (value_list)}]
        [[STORAGE] ENGINE [=] engine_name]
        [COMMENT [=] 'comment_text' ]
        [DATA DIRECTORY [=] 'data_dir']
        [INDEX DIRECTORY [=] 'index_dir']
        [MAX_ROWS [=] max_number_of_rows]
        [MIN_ROWS [=] min_number_of_rows]
        [TABLESPACE [=] tablespace_name]
        [NODEGROUP [=] node_group_id]
        [(subpartition_definition [, subpartition_definition] ...)]

subpartition_definition:
    SUBPARTITION logical_name
        [[STORAGE] ENGINE [=] engine_name]
        [COMMENT [=] 'comment_text' ]
        [DATA DIRECTORY [=] 'data_dir']
        [INDEX DIRECTORY [=] 'index_dir']
        [MAX_ROWS [=] max_number_of_rows]
        [MIN_ROWS [=] min_number_of_rows]
        [TABLESPACE [=] tablespace_name]
        [NODEGROUP [=] node_group_id]

 

 例子：
 
創建range分區

CREATE TABLE  `testpartition` (  
   `id` int(11) NOT NULL AUTO_INCREMENT ,  
   `name` varchar(50) NOT NULL  ,  
   `sex` int(1) NOT NULL DEFAULT '0' ,  
   PRIMARY KEY (`id`)  
 ) ENGINE=Innodb  DEFAULT CHARSET=utf8 
 PARTITION BY RANGE (id) (  
     PARTITION p0 VALUES LESS THAN (3),  
     PARTITION p1 VALUES LESS THAN (6),  
     PARTITION p2 VALUES LESS THAN (9),  
     PARTITION p3 VALUES LESS THAN (12),  
     PARTITION p4 VALUES LESS THAN MAXVALUE  
 );  

 插入數據

 INSERT INTO testpartition (`name` ,`sex`)VALUES ('jhh', '0')  
,('zhang',1),('ying',1),('aaaa',1),('bbbb',0),('test1',1),('jhh2',1)  
,('jhh1',1),('test2',1),('test3',1),('test4',1),('test5',1),('jhh3',1)  
,('jhh4',1),('jhh5',1),('jhh6',1),('jhh7',1),('jhh8',1),('jhh9',1)  
,('jhh10',1),('jhh11',1),('jhh12',1),('jhh13',1),('jhh21',1),('jhh42',1);

 
 
 可以drop 某個分區 
 alter table drop partition p4 ;
 
 如果是刪除了最大的分區p4，導致比較大的數值沒有相應的分區，會報如下類似錯誤的。 
 ERROR 1526 (HY000): Table has no partition for value .
 
改變分區，相當於重整分區了。 需要生成臨時表 ，並且加鎖。

 alter table testpartition partition by RANGE(id)  
(PARTITION p1 VALUES less than (6),  
PARTITION p2 VALUES less than (16),  
PARTITION p3 VALUES less than MAXVALUE);

Hash分區和key分區 , 只需要指定 partitions的數量。

CREATE TABLE IF NOT EXISTS `test_hash_part44` (  
  `id` int(11) NOT NULL  ,  
  `pid` int(11) NOT NULL  ,  
  `comment` varchar(1000) NOT NULL DEFAULT '' ,  
  `ip` varchar(25) NOT NULL DEFAULT '' ,  
  PRIMARY KEY (`id`)  
) ENGINE=INNODB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1  
PARTITION BY KEY(id)  
PARTITIONS 3;