MySQL存储过程相互调用并获得错误码示例

发布时间：2020-12-12 08:15:32 所属栏目：MsSql教程来源：网络整理

导读：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

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>

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!