验证MGR架构表需要使用主键,不然插入数据会报错。

mysql> show tables;
+--------------+
| Tables_in_dd |
+--------------+
| a            |
+--------------+
1 row in set (0.00 sec)

mysql> desc a; +-------+---------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+---------+------+-----+---------+-------+ | id | int(11) | YES | | NULL | | +-------+---------+------+-----+---------+-------+ 1 row in set (0.00 sec)

mysql> insert into a values(1); ERROR 3098 (HY000): The table does not comply with the requirements by an external plugin.

mysql> alter table a add primary key (id); Query OK, 0 rows affected (0.02 sec) Records: 0 Duplicates: 0 Warnings: 0

mysql> desc a; +-------+---------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+---------+------+-----+---------+-------+ | id | int(11) | NO | PRI | NULL | | +-------+---------+------+-----+---------+-------+ 1 row in set (0.01 sec)

mysql> insert into a values(1); Query OK, 1 row affected (0.00 sec) mysql> insert into a values(1); Query OK, 1 row affected (0.00 sec)

mysql> select * from a; +----+ | id | +----+ | 1 | +----+ 1 row in set (0.00 sec)