下面是一种实现的方法。思路就是想办法在触发器中利用一个出错的语句来中断代码的执行。 mysql create table t_control(id int primary key); Query OK, 0 rows affected (0.11 sec) mysql insert into t_control v
下面是一种实现的方法。思路就是想办法在触发器中利用一个出错的语句来中断代码的执行。 mysql> create table t_control(id int primary key); Query OK, 0 rows affected (0.11 sec) mysql> insert into t_control values (1); Query OK, 1 row affected (0.05 sec) mysql> create table t_bluerosehero(id int primary key,col int); Query OK, 0 rows affected (0.11 sec) mysql> delimiter // mysql> create trigger tr_t_bluerosehero_bi before insert on t_bluerosehero -> for each row -> begin -> if new.col>30 then -> insert into t_control values (1); -> end if; -> end; -> // Query OK, 0 rows affected (0.08 sec) mysql> delimiter ; mysql> mysql> insert into t_bluerosehero values (1,20); Query OK, 1 row affected (0.25 sec) mysql> insert into t_bluerosehero values (2,40); ERROR 1062 (23000): Duplicate entry '1' for key 'PRIMARY' mysql> mysql> select * from t_bluerosehero; +----+------+ | id | col | +----+------+ | 1 | 20 | +----+------+ 1 row in set (0.00 sec) mysql> 或者 mysql> delimiter // mysql> create trigger tr_t_bluerosehero_bi before insert on t_bluerosehero -> for each row -> begin -> declare i int; -> if new.col>30 then -> insert into xxxx values (1); -> end if; -> end; -> // Query OK, 0 rows affected (0.06 sec) mysql> delimiter ; mysql> delete from t_bluerosehero; Query OK, 3 rows affected (0.05 sec) mysql> insert into t_bluerosehero values (1,20); Query OK, 1 row affected (0.06 sec) mysql> insert into t_bluerosehero values (2,40); ERROR 1146 (42S02): Table 'csdn.xxxx' doesn't exist mysql>
