复制代码 代码如下: mysql mysql delimiter $$ mysql mysql CREATE PROCEDURE myProc() – MODIFIES SQL DATA – BEGIN – DECLARE l_status VARCHAR(20); – – CALL myProc1(l_status); – IF l_status=’Duplicate Entry’ THEN – SELECT CONCAT(‘Warning:
复制代码 代码如下: mysql> mysql> delimiter $$ mysql> mysql> CREATE PROCEDURE myProc() -> MODIFIES SQL DATA -> BEGIN -> DECLARE l_status VARCHAR(20); -> -> CALL myProc1(l_status); -> IF l_status=’Duplicate Entry’ THEN -> SELECT CONCAT(‘Warning: using existing definition for location ‘) AS warning; -> END IF; -> END$$ Query OK, 0 rows affected (0.00 sec) mysql> mysql> CREATE PROCEDURE myProc1(OUT out_status VARCHAR(30)) -> BEGIN -> set out_status = ‘Duplicate Entry’; -> END$$ Query OK, 0 rows affected (0.00 sec) mysql> mysql> mysql> delimiter ; mysql> call myProc(); +————————————————–+ | warning | +————————————————–+ | Warning: using existing definition for location | +————————————————–+ 1 row in set (0.00 sec) Query OK, 0 rows affected (0.01 sec) mysql> drop procedure myProc; Query OK, 0 rows affected (0.00 sec) mysql> drop procedure myProc1; Query OK, 0 rows affected (0.00 sec) mysql> mysql>
