如何检查MySQL中是否存在存储过程?
让我们首先创建一个存储过程" title="存储过程">存储过程-
mysql> DELIMITER //mysql> CREATE PROCEDURE ExtenddatesWithMonthdemo(IN date1 datetime, IN NumberOfMonth int )
-> BEGIN
-> SELECT DATE_ADD(date1,INTERVAL NumberOfMonth MONTH) AS ExtendDate;
-> END;
-> //
mysql> DELIMITER ;
现在,使用help SHOW CREATE命令检查存储过程是否存在。
查询如下-
mysql> SHOW CREATE PROCEDURE ExtenddatesWithMonthdemo;The following is the output displaying the details of the stored procedure we created above:
+--------------------------+--------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+--------------------+
| Procedure | sql_mode | Create Procedure | character_set_client | collation_connection | Database Collation |
+--------------------------+--------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+--------------------+
| ExtenddatesWithMonthdemo | STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION | CREATE DEFINER = `root`@`%` PROCEDURE `ExtenddatesWithMonthdemo`(IN date1 datetime, IN NumberOfMonth int )
BEGIN
SELECT DATE_ADD(date1,INTERVAL NumberOfMonth MONTH) AS ExtendDate;
END | utf8 | utf8_general_ci | utf8_general_ci |
+--------------------------+--------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+--------------------+
1 row in set (0.00 sec)
借助CALL命令调用存储过程。查询如下-
mysql> call ExtenddatesWithMonthdemo('2019-02-13',6);
输出结果
+---------------------+| ExtendDate |
+---------------------+
| 2019-08-13 00:00:00 |
+---------------------+
1 row in set (0.10 sec)
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