ホームページ >データベース >mysql チュートリアル >MySQL存储过程相互调用并获得错误码
演示如何在存储过程中调用另外一个存储过程,并获取执行的错误信息 MySQL mysqlmysql delimiter $$mysqlmysql CREATE PROCEDURE myProc() - MODIFIES SQL DATA - BEGIN - DECLARE l_status VARCHAR(20); - - CALL myProc1(l_status); - IF l_status='Duplicat
演示如何在存储过程中调用另外一个存储过程,并获取执行的错误信息mysql> mysql> delimiter $$ 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>