MySQL的改变表分区的语法

Question

我试图通过改变表用下面的代码做表分区的MySQL：

ALTER TABLE tt DROP PRIMARY KEY, ADD PRIMARY KEY(id, st); 
ALTER TABLE tt ADD PARTITION BY LIST(st) (
    PARTITION p0 VALUES IN (20,10), 
    PARTITION p1 VALUES IN (0,-10) 
); 

而且得到了以下错误：

Mysql::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ALTER TABLE tt ADD PARTITION (PARTITION p0 VALUES IN' at line 2:

可有人请让我语法有什么问题？

Answer 1

ALTER TABLE orders PARTITION BY LIST(st) (
      PARTITION p0 VALUES IN (20,10), 
      PARTITION p1 VALUES IN (0,-10) 
); 

的ADD是多余的 - 语法到CREATE TABLE声明基本相同。

确保您在执行此操作之前拥有良好的可恢复备份。

登录：

mysql> create table orders (id int, st int, whatever varchar(10), primary key (id)); 
Query OK, 0 rows affected (0.06 sec) 

mysql> ALTER TABLE orders DROP PRIMARY KEY, ADD PRIMARY KEY(id, st); 
Query OK, 0 rows affected (0.06 sec) 
Records: 0 Duplicates: 0 Warnings: 0 

mysql> ALTER TABLE orders PARTITION BY LIST(st) (
    ->   PARTITION p0 VALUES IN (20,10), 
    ->   PARTITION p1 VALUES IN (0,-10) 
    ->); 
Query OK, 0 rows affected (0.06 sec) 
Records: 0 Duplicates: 0 Warnings: 0