MySQL SP : ERROR 1241 (21000)

Question

您好，我正在尝试使用此 sp 插入语句插入:

call insertuser (1, '077788899965', 'Digest 1.0', ':=', 'asjdfhiuoadshgiadufg');

SP 代码:

DELIMITER$$

CREATE PROCEDURE insertuser (IN IdParam INT, IN UserNameParam varchar(64), IN AttributeParam varchar(64), IN OpParam  char(2), IN ValueParam varchar(253)) 
BEGIN 

    // Delete user if they already exist

    DELETE FROM radcheck 
    WHERE username = UserNameParam; 

    // Insert

    INSERT INTO  radcheck (id, username, atrribute, op, value) 
    SELECT (IdParam, UserNameParam, AttributeParam, OpParam, ValueParam); 

END$$

但是我得到的错误是:

ERROR 1241 (21000): Operand should contain 1 column(s)

知道如何解决这个问题吗？

Answer 1

DELIMITER $$

CREATE PROCEDURE insertuser (IN IdParam INT, IN UserNameParam varchar(64), 
                             IN AttributeParam varchar(64), IN OpParam  char(2), 
                             IN ValueParam varchar(253)) 
BEGIN 
    DELETE FROM radcheck 
    WHERE username = UserNameParam; 

    INSERT INTO  radcheck (id, username, atrribute, op, `value`) 
    SELECT IdParam, UserNameParam, AttributeParam, OpParam, ValueParam;
END
$$

有两个问题:

• DELIMITER 后缺少空格
• // 在 MySQL 中不是注释开头。使用 /* */

如果您使用像 MySQL Workbench 这样的 SQL IDE，这样的错误将被突出显示并且更容易修复。