如何使用 VIEWS 来模拟 CHECK CONSTRAINT？
示例
假设我们有一个名为“car1”的表，可以修复该问题语法注册号，如两个字母、一个破折号、三个数字、一个破折号、两个字母，如下 -
mysql> Create table car1 (number char(9)); Query OK, 0 rows affected (0.32 sec) mysql> Insert into car1 values('AB-235-YZ'); Query OK, 1 row affected (0.10 sec)登录后复制
mysql> insert into car1 values('AB-2X5-YZ'); Query OK, 1 row affected (0.04 sec)登录后复制
创建 VIEW 来模拟 CHECK CONSTRAINT 以插入和更新价值观 -
mysql> Create view car_invalid_check as -> Select * from car1 WHERE number rlike '^[[:alpha:]]{2}-[[:digit:]]{3}-[[:alpha:]]{2}$' -> with check option; Query OK, 0 rows affected (0.12 sec) mysql> Insert into car_invalid_check values('AB-2X5-YZ'); ERROR 1369 (HY000): CHECK OPTION failed 'query.car_invalid_check' mysql> Insert into car_invalid_check values('AB-235-YZ'); Query OK, 1 row affected (0.09 sec) mysql> Update car_invalid_check SET NUMBER = 'AB-2X5-ZT'; ERROR 1369 (HY000): CHECK OPTION failed 'query.car_invalid_check'登录后复制
