MySQL存储过程错误1064

Question

我正在处理一些代码，并且陷入了这个存储过程的问题。。。花了太长时间了，所以如果有人能告诉我我是谁，请告诉我。

我收到以下错误：

错误代码：1064您的SQL语法错误； 检查与您的MySQL服务器版本相对应的手册，以在'@ownerid varchar（50）附近使用正确的语法； 声明@active tinyint; 声明@subuser tinyint; 在第4行设置

在此代码上：

    DELIMITER //

USE `test`//

DROP PROCEDURE IF EXISTS `getAccount`//

CREATE DEFINER=`peter`@`%` PROCEDURE `getAccount`( IN cid VARCHAR(20))
BEGIN
    DECLARE cardid VARCHAR(50);
    DECLARE @ownerid VARCHAR(50);
    DECLARE @active TINYINT;
    DECLARE @subuser TINYINT;
    SET cardid = MD5( cid + SHA1(cid + 'a salt value'));

    SELECT @active = active, @ownerid = ownerid, @subuser = subuser FROM cards_tbl WHERE cardhash = cardid;

    IF @active = 1 THEN
        IF @subuser = 1 THEN
            SELECT subuser_m2s_tbl.name,subuser_m2s_tbl.image, user_saldo.saldo AS credits FROM subuser_m2s_tbl 
            JOIN user_saldo ON subuser_m2s_tbl.subhash = user_saldo.userhash 
            WHERE subuser_m2s_tbl.subhash = @ownerid;
        ELSE
            SELECT user_m2s_tbl.name,user_m2s_tbl.image, user_saldo.saldo AS credits FROM user_m2s_tbl 
            JOIN user_saldo ON user_m2s_tbl.userhash = user_saldo.userhash 
            WHERE user_m2s_tbl.userhash = @ownerid; 
        END IF;
    END IF; 
    END$$

DELIMITER ;

这是存储过程的新手，因此它非常简单。.....在此先感谢

Answer 1

要在SELECT语句中将值传递给变量时，应使用'：='而不是'='，否则MySQL将只与操作数进行比较。

SELECT
  active_var := active, ownerid_var := ownerid, subuser_var := subuser
FROM
  cards_tbl
WHERE
  cardhash = cardid;

您也可以使用SELECT INTO语句，例如-

SELECT
  active, ownerid, subuser
INTO
  active_var, ownerid_var, subuser_var
FROM
  cards_tbl
WHERE
  cardhash = cardid;

SELECT语法 。

Answer 2

也许是失踪的@

DECLARE cardid VARCHAR(50);

...

DECLARE @cardid VARCHAR(50);