修改AUTO_INCREMENT PRIMARY KEY进行分区

Question

我需要在临时数据（字段从下表开始）中对MySQL表进行分区。

CREATE TABLE `table1` (
    `id` bigint(20) NOT NULL AUTO_INCREMENT, 
    `fk_id` bigint(20) NOT NULL, 
    `begin` bigint(20) NOT NULL,  
    PRIMARY KEY (`id`), 
    KEY `FK1E57078DB20EC268` (`fk_id`) 
) ENGINE=MyISAM AUTO_INCREMENT=10443288 DEFAULT CHARSET=latin1 

当我试图划分是这样的：

alter table table1 partition by range (begin) (
PARTITION until_2010_07 VALUES LESS THAN (1280620800000), 
PARTITION 2010_08 VALUES LESS THAN (1283299200000), 
PARTITION 2010_09 VALUES LESS THAN (1285891200000), 
PARTITION 2010_10 VALUES LESS THAN (1288569600000), 
PARTITION 2010_11 VALUES LESS THAN (1291161600000), 
PARTITION 2010_12 VALUES LESS THAN (1293840000000), 
PARTITION from_2011 VALUES LESS THAN MAXVALUE 
); 

我得到一个MySQL错误：ERROR 1503 (HY000): A PRIMARY KEY must include all columns in the table's partitioning function

当我从MySQL文档明白，分区列应该属于主键。 对我来说，问题是我想改变PRIMARY_KEY为一个复合的，即PRIMARY KEY ('id','fk_id','begin')而不改变现有的id列（因为它是一个在应用程序中用来生成可收藏的url的字段，所以重新编号的id不是一个选项）

如何更改PRIMARY_KEY以便我可以进行分区？

Answer 1

我终于找到了一个办法做到这一点，我的回答对谁遇到这个问题，其他人着想

//drop auto_increment capability 
alter table table1 change column id id BIGINT NOT NULL; 
//in one line, drop primary key and rebuild one 
alter table table1 drop primary key, add primary key(id,fk_id,begin); 
//re add the auto_increment capability, last value is remembered 
alter table table1 change column id id BIGINT NOT NULL AUTO_INCREMENT; 
//build the partition 
alter table table1 partition by range (begin) ( 
    PARTITION until_2010_07 VALUES LESS THAN (1280620800000), 
    PARTITION 2010_08 VALUES LESS THAN (1283299200000), 
    PARTITION 2010_09 VALUES LESS THAN (1285891200000), 
    PARTITION 2010_10 VALUES LESS THAN (1288569600000), 
    PARTITION 2010_11 VALUES LESS THAN (1291161600000), 
    PARTITION 2010_12 VALUES LESS THAN (1293840000000), 
    PARTITION from_2011 VALUES LESS THAN MAXVALUE 
); 

分区确实很容易，但我建议人们思考它在创建实际使用他们的数据库在生产:-)

每一步都需要3分钟，我的笔记本电脑前主键，那么我将不得不停止该服务，以保持我的数据库一致性