mysql - 更新程序 输入参数中的列不正确/未知

Question

我有一个输入参数错误，但我不知道为什么:

0   14:31:47    call UpdateComment(66,1,2,"NOWYTitle","NOWYContent")    Error Code: 1054. Unknown column 'NOWYTitle' in 'field list'

调用过程:

call UpdateComment(66,1,2,"NOWYTitle","NOWYContent");

我的程序:

DELIMITER $$
DROP PROCEDURE IF EXISTS UpdateComment $$
CREATE PROCEDURE `UpdateComment`(UserId INT,/*Crc32 int(11) unsigned,*/ArticleId int(11),CommentsId int(11), newTitle varchar(255), newContent varchar(255))
BEGIN

        DECLARE helpUserTable varchar(255);

        set helpUserTable = CONCAT("User",UserId);

        set @score1 =CONCAT("UPDATE `",helpUserTable,"` SET Title = ",newTitle," WHERE CommentsId = ",CommentsId," AND ArticleId = ",ArticleId);
        PREPARE stmt FROM @score1;
        EXECUTE stmt;
        DEALLOCATE PREPARE stmt;
        set @score2 =CONCAT("UPDATE `",helpUserTable,"` SET Content = ",newContent," WHERE CommentsId = ",CommentsId," AND ArticleId = ",ArticleId);
        PREPARE stmt FROM @score2;
        EXECUTE stmt;
        DEALLOCATE PREPARE stmt;

END

Answer 1

首先，您需要在命令中的文本值周围添加引号，其次您的 SQL 语句可以合并为一个语句(它们共享相同的 where 子句):

试试这个:

    set @score1 = CONCAT("UPDATE `", helpUserTable, "` SET Title = '", newTitle, 
        "', Content = '", newContent, "' WHERE CommentsId = ", 
        CommentsId, " AND ArticleId = ", ArticleId);

并完全删除@score2