MySQL存儲過程錯誤1064

Question

我正在處理一些代碼，並且陷入了這個存儲過程的問題。。。花了太長時間了，所以如果有人能告訴我我是誰，請告訴我。

我收到以下錯誤：

錯誤代碼：1064您的SQL語法錯誤； 檢查與您的MySQL服務器版本相對應的手冊，以在'@ownerid varchar（50）附近使用正確的語法； 聲明@active tinyint; 聲明@subuser tinyint; 在第4行設置

在此代碼上：

    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 ;

這是存儲過程的新手，因此它非常簡單。.....在此先感謝

Answer 1

要在SELECT語句中將值傳遞給變量時，應使用'：='而不是'='，否則MySQL將只與操作數進行比較。

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

您也可以使用SELECT INTO語句，例如-

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

SELECT語法 。

Answer 2

也許是失蹤的@

DECLARE cardid VARCHAR(50);

...

DECLARE @cardid VARCHAR(50);