Question

我的MySQL存储过程非常糟糕，我无法在数据库中创建此过程（MySQL 5.5.27）

我想知道为什么它拒绝我的变量声明，多选和if else（希望是一些代码错误）我粘贴我的代码！

DELIMITER $$

DROP PROCEDURE IF EXISTS EditEnterprise

$$

CREATE PROCEDURE  EditEnterprise(    
    IN pEnterpriseId                VARCHAR(32),    
    IN pEnterpriseName              VARCHAR(64)    
) 

/* declare the new variables */    
DECLARE nEnterpriseId               VARCHAR(32);    
DECLARE nEnterpriseName             VARCHAR(64); 

/* declare the old variables */    
DECLARE oEnterpriseId               VARCHAR(32);    
DECLARE oEnterpriseName             VARCHAR(64);

BEGIN 

SET autocommit = 0;    

/* get the old variables */    
SELECT     
    Enterprise_ID = oEnterpriseId,    
    Enterprise_Name = oEnterpriseName    
FROM     
    enterprise    
WHERE    
    Enterprise_ID = pEnterpriseId;    

/* set the variables with the new inputs */  
IF pEnterpriseName = NULL    
    SET nEnterpriseName = oEnterpriseName    
ELSE IF pEnterpriseName = ''    
    SET oEnterpriseName = NULL    
ELSE
    SET nEnterpriseName = pEnterpriseName    


UPDATE enterprise    
SET     
    Enterprise_Name = nEnterpriseName    
WHERE Enterprise_ID = pEnterpriseId;

COMMIT;

END $$

DELIMITER ;

Answer 1

在Mysql（与Oracle不同）中，DECLARE追踪BEGIN

您的代码应为：

DELIMITER $$

DROP PROCEDURE IF EXISTS EditEnterprise$$

CREATE PROCEDURE  EditEnterprise(
    IN pEnterpriseId                VARCHAR(32),
    IN pEnterpriseName              VARCHAR(64)
) 
BEGIN 
/* declare the new variables */
DECLARE nEnterpriseId               VARCHAR(32);
DECLARE nEnterpriseName             VARCHAR(64);

/* declare the old variables */
DECLARE oEnterpriseId               VARCHAR(32);
DECLARE oEnterpriseName             VARCHAR(64);

SET autocommit = 0;

/* get the old variables */
SELECT 
    Enterprise_ID := oEnterpriseId,
    Enterprise_Name := oEnterpriseName
FROM 
    enterprise
WHERE
    Enterprise_ID = pEnterpriseId;

/* set the variables with the new inputs */


IF pEnterpriseName IS NULL THEN
    SET nEnterpriseName = oEnterpriseName;
ELSEIF pEnterpriseName = '' THEN
    SET oEnterpriseName = NULL;
ELSE
    SET nEnterpriseName = pEnterpriseName;
END IF;

UPDATE enterprise SET 
    Enterprise_Name = nEnterpriseName
WHERE Enterprise_ID = pEnterpriseId;

COMMIT;

END$$

DELIMITER ;

我还添加了丢失的;，THEN和END IF个关键字。另外，请注意您可能在此行中输入错字：

SET oEnterpriseName = NULL;

你可能意味着：

SET nEnterpriseName = NULL;

现在我认为你应该重新考虑你的存储过程。实际上，所有这些都可以在单个SQL查询中完成。你真的需要一个存储过程吗？除非您有限制性拨款政策，否则可能只是多余的。

Answer 2

SP中存在一些错误，应该是这样的

DELIMITER $$
DROP PROCEDURE IF EXISTS EditEnterprise
$$
CREATE PROCEDURE  EditEnterprise(
    IN pEnterpriseId                VARCHAR(32),
    IN pEnterpriseName              VARCHAR(64)
)

BEGIN

/* declare the new variables */
DECLARE nEnterpriseId               VARCHAR(32);
DECLARE nEnterpriseName             VARCHAR(64);

/* declare the old variables */
DECLARE oEnterpriseId               VARCHAR(32);
DECLARE oEnterpriseName             VARCHAR(64);

SET autocommit = 0;

/* get the old variables */
SELECT 
    @oEnterpriseID := Enterprise_ID,
    @oEnterpriseName := Enterprise_Name
FROM 
    enterprise
WHERE
    Enterprise_ID = pEnterpriseId;

/* set the variables with the new inputs */
IF pEnterpriseName = NULL THEN  
    SET @nEnterpriseName = @oEnterpriseName;
ELSEIF pEnterpriseName = '' THEN   
    SET @oEnterpriseName = NULL;
ELSE
    SET @nEnterpriseName = pEnterpriseName;
END IF;

UPDATE enterprise
SET 
    Enterprise_Name = nEnterpriseName,
    Enterprise_Established_Date = nEnterpriseCreateDate,
    Enterprise_Description = nEnterpriseDetails,
    Enterprise_Type = nEnterpriseType,
    Enterprise_Status = nEnterpriseStatus
WHERE Enterprise_ID = pEnterpriseId;
COMMIT;

END $$
DELIMITER ;

指出一些错误

如果ELSE IF适用于多种情况，则为ELSEIF
声明变量“DECLARE myvar VARCHAR（32）”后，如果我们不使用SET命令，我们需要使用：=为其赋值。

MySQL存储过程存在多个语句问题

2 个答案: