MySQL存储过程不适用于SELECT(基本问题) [英] MySQL Stored Procedures not working with SELECT (basic question)

问题描述

我正在使用一个平台(performforms)，该平台要求我对大多数查询使用存储过程，并且从未使用过存储过程，所以无法弄清楚自己在做什么错.以下语句执行无错误:

I am using a platform (perfectforms) that requires me to use stored procedures for most of my queries, and having never used stored procedures, I can't figure out what I'm doing wrong. The following statement executes without error:

DELIMITER //
DROP PROCEDURE IF EXISTS test_db.test_proc//
CREATE PROCEDURE test_db.test_proc() SELECT 'foo'; //
DELIMITER ;

但是当我尝试使用以下方式调用它时:

But when I try to call it using:

CALL test_proc();

我收到以下错误:

#1312 - PROCEDURE test_db.test_proc can't return a result set in the given context

我正在phpmyadmin 3.2.4，PHP版本5.2.12和mysql服务器版本5.0.89-community中执行这些语句.

I am executing these statements from within phpmyadmin 3.2.4, PHP Version 5.2.12 and the mysql server version is 5.0.89-community.

当我编写一个存储过程返回一个参数，然后选择它时，一切正常(例如):

When I write a stored procedure that returns a parameter, and then select it, things work fine (e.g.):

DELIMITER //
DROP PROCEDURE IF EXISTS test_db.get_sum//
CREATE PROCEDURE test_db.get_sum(out total int)
BEGIN
SELECT SUM(field1) INTO total FROM test_db.test_table;
END //
DELIMITER ;

工作正常，当我调用它时:

works fine, and when I call it:

CALL get_sum(@t); SELECT @t;

我没问题了.

最终，我需要做的是在存储过程中包装一个漂亮的SELECT语句，因此我可以调用它，并返回多个字段的多行.现在，我只是想让任何选择正常工作.

Ultimately, what I need to do is have a fancy SELECT statement wrapped up in a stored procedure, so I can call it, and return multiple rows of multiple fields. For now I'm just trying to get any select working.

非常感谢您的帮助.

推荐答案

弄清楚了.这不是PHP的错误(尽管以前是)-在某些版本的phpmyadmin中是错误.间歇性地出现相同的错误，然后在各种子版本中对其进行了修复(请参见上文):

Figured it out. This is not a bug with PHP (though it used to be) - it's a bug in some versions of phpmyadmin. The same bug intermittently reappears and is then fixed in various subversions (see above):

#1312 - PROCEDURE [name] can't return a result set in the given context

此行为似乎仅限于phpmyadmin内部存储过程中的 SELECT语句 .

This behavior appears limited to SELECT statements within stored procedures inside phpmyadmin.

使用类似MySQL Workbench的客户端可以解决该问题(或者您可以升级phpmyadmin，但是如果您使用的是像我这样的共享服务器，那会很麻烦).

Using a client like MySQL Workbench works around the problem (or you could upgrade phpmyadmin, but that's a pain if you're on a shared server like I am).

无论如何，感谢大家的帮助.

Anyway, thanks to everyone for your help.

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