Question

一个简单的问题：我已将数据库从MSSQL移到MySQL，我现在正在转换存储过程。但是，这个在执行时似乎没有正常运行（我可以创建它，但是当我运行它时我得不到结果）：

DELIMITER $$

CREATE PROCEDURE `Employee_GetAll`(
IN community_id int,
IN search varchar(255)
)
BEGIN

select e.*, er.name as rolename, er.access_level as accesslevel from Employee e
inner join Employee_Role er on e.employee_role = er.id
where e.community_id = community_id
and (firstname like ('%' + search + '%') or lastname like ('%' + search + '%'));

END

所以，我可以创建它，但是当我运行它时没有给出结果。如果我运行此代码......

select e.*, er.name as rolename, er.access_level as accesslevel from Employee e
inner join Employee_Role er on e.employee_role = er.id
where e.community_id = 1
and (firstname like ('%do%') or lastname like ('%do%'));

...然后运行正常。那么，我是否在使用SEARCH变量做错了什么？我是MySQL的新手，并尝试稍微改进它。

此致

鲍勃

Answer 1

一些问题：

不要为参数指定与列名相同的名称
使用CONCAT()为LIKE。
由于它是一个声明程序，因此您不需要使用BEGIN...END阻止并更改DELIMITER

这就是说这样试试

CREATE PROCEDURE `Employee_GetAll`(
  IN _community_id INT,
  IN _search VARCHAR(255)
)
SELECT e.*, er.name AS rolename, er.access_level AS accesslevel 
 FROM Employee e JOIN Employee_Role er 
   ON e.employee_role = er.id
 WHERE e.community_id = _community_id
   AND (firstname LIKE CONCAT('%', _search, '%') OR 
        lastname  LIKE CONCAT('%', _search, '%'));

这是 SQLFiddle 演示

MySQL SP不返回结果？可变问题？

1 个答案: