Question

我在MySQL数据库上创建了一个存储过程，如果我直接从Navicat（一个SGBD）运行它，它可以工作正常但如果我尝试从C＃代码运行存储过程的脚本，我会收到一个错误＆＃34;参数＆＃39; @ req＆＃39;必须定义＆＃34;。我的代码如下：

DROP PROCEDURE IF EXISTS SP_GET_EXPERIENCE_RECORD_STATISTICS;

CREATE PROCEDURE SP_GET_EXPERIENCE_RECORD_STATISTICS(IN startTime  VARCHAR(19), IN endTime VARCHAR(19), IN isEquipment INT)
BEGIN
DECLARE req VARCHAR(1000);
SET @req = "SELECT ";

IF(isEquipment = 1) THEN
    SET @req = CONCAT(@req, "ClientName,");
ELSE
    SET @req = CONCAT(@req, "ContentName 'ClientName',");
END IF;

SET req = CONCAT(req, " COUNT(1) 'ConsumeCount',
SUM(Points) 'PointsCount',
SUM(CASE WHEN Mode = 1 THEN 1 ELSE 0 END) 'CardCount',
SUM(CASE WHEN Mode = 1 THEN Points ELSE 0 END) 'CardPoints',
SUM(CASE WHEN Mode = 0 THEN 1 ELSE 0 END) 'WeChatCount',
SUM(CASE WHEN Mode = 0 THEN Points ELSE 0 END) 'WeChatPoints'
FROM experiencerecord
WHERE EndTime BETWEEN '", startTime, "' AND '", endTime, "'");

IF (isEquipment = 1) THEN
    SET @req = CONCAT(@req, " GROUP BY ClientName");
ELSE
    SET req = CONCAT(req, " GROUP BY ContentName");
END IF;

PREPARE stmt FROM @req;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
END;

 -- CALL SP_GET_EXPERIENCE_RECORD_STATISTICS('2010-01-01 00:00:00', '2016-12-31 23:59:59', 0);
 -- CALL SP_GET_EXPERIENCE_RECORD_STATISTICS('2010-01-01 00:00:00', '2016-12-31 23:59:59', 1);

我在C＃中的代码：

MySqlConnection conn = new MySqlConnection(Properties.Settings.Default.DatabaseConnectionString);

public bool mysql(string sql)
    {
        try
        {
            MySqlCommand comm = new MySqlCommand(sql, conn);
            MySqlDataAdapter mda = new MySqlDataAdapter(comm);
            DataSet ds = new DataSet();
            mda.Fill(ds);
            return true;
        }
        catch (Exception ex)
        {
            return false;
            throw ex;
        }

    }

任何想法来自哪里都将非常感激。

Answer 1

最后我添加了Allow User Variables = True;到connectionString，现在它工作得很好。

Answer 2

似乎是拼写错误

[ec2-user ~]$ sudo groupadd www

[ec2-user ~]$ sudo usermod -a -G www ec2-user

[ec2-user ~]$ sudo chown -R root:www /var/www

[ec2-user ~]$ sudo chmod 2775 /var/www

[ec2-user ~]$ find /var/www -type d -exec sudo chmod 2775 {} \;

[ec2-user ~]$ find /var/www -type f -exec sudo chmod 0664 {} \;

此外，由于# phpMyAdmin - Web based MySQL browser written in php # # Allows only localhost by default # # But allowing phpMyAdmin to anyone other than localhost should be considered # dangerous unless properly secured by SSL Alias /phpMyAdmin /usr/share/phpMyAdmin Alias /phpmyadmin /usr/share/phpMyAdmin <Directory /usr/share/phpMyAdmin/> AddDefaultCharset UTF-8 <IfModule mod_authz_core.c> # Apache 2.4 <RequireAny> Require ip my_ip Require ip ::1 </RequireAny> </IfModule> <IfModule !mod_authz_core.c> # Apache 2.2 Order Deny,Allow Deny from All Allow from my_ip Allow from ::1 </IfModule> </Directory> <Directory /usr/share/phpMyAdmin/setup/> <IfModule mod_authz_core.c> # Apache 2.4 <RequireAny> Require ip my_ip Require ip ::1 </RequireAny> </IfModule> <IfModule !mod_authz_core.c> # Apache 2.2 Order Deny,Allow Deny from All Allow from my_ip Allow from ::1 </IfModule> </Directory> # These directories do not require access over HTTP - taken from the original # phpMyAdmin upstream tarball # <Directory /usr/share/phpMyAdmin/libraries/> Order Deny,Allow Deny from All Allow from None </Directory> <Directory /usr/share/phpMyAdmin/setup/lib/> Order Deny,Allow Deny from All Allow from None </Directory> <Directory /usr/share/phpMyAdmin/setup/frames/> Order Deny,Allow Deny from All Allow from None </Directory> # This configuration prevents mod_security at phpMyAdmin directories from # filtering SQL etc. This may break your mod_security implementation. # #<IfModule mod_security.c> # <Directory /usr/share/phpMyAdmin/> # SecRuleInheritance Off # </Directory> #</IfModule>是参数，我在C＃代码中看不到任何IF (isEquipment = 1) THEN SET @req = CONCAT(@req, " GROUP BY ClientName"); ELSE SET @req = CONCAT(@req, " GROUP BY ContentName"); //You forgot @req here! END IF;行。

AddWithParameter

MySQL参数必须用C＃定义

2 个答案: