在下面的存储过程中我遇到了一个错误:
DROP PROCEDURE IF EXISTS `SP_DeleteFileInfo`;
CREATE PROCEDURE `SP_DeleteFileInfo`(pFileID int)
Set @FileRef= null;
select filesinfo.ReferenceID into @FileRef FROM filesinfo where filesinfo.FileID =pFileID;
DELETE From filesinfo
WHERE filesinfo.FileID= pFileID;
IF EXISTS(SELECT * from filesrefrences where filesrefrences.ReferenceID= @FileRef and filesrefrences.RefrenceCount>1) then
update filesrefrences
set
filesrefrences.RefrenceCount= filesrefrences.RefrenceCount-1
where
filesrefrences.ReferenceID= @FileRef;
SELECT @FileRef;
ELSE IF(@FileRef is Not NULL) THEN
DELETE from filesrefrences WHERE filesrefrences.ReferenceID = @FileRef;
SELECT -77;
ELSE
SELECT -99;
end if;
遇到的错误是:
[SQL]
select filesinfo.ReferenceID into @FileRef FROM filesinfo where filesinfo.FileID =pFileID;
[Err] 1054 - **Unknown column 'pFileID' in 'where clause'**
解决此错误的最佳解决方案是什么?
最佳答案
将pFileID
定义为IN
参数,例如
CREATE PROCEDURE SP_DeleteFileInfo(IN pFileID int)
完整查询,
DROP PROCEDURE IF EXISTS `SP_DeleteFileInfo`;
DELIMITER //
CREATE PROCEDURE `SP_DeleteFileInfo`(IN pFileID int)
BEGIN
Set @FileRef= null;
select filesinfo.ReferenceID into @FileRef FROM filesinfo where filesinfo.FileID =pFileID;
DELETE From filesinfo WHERE filesinfo.FileID= pFileID;
IF EXISTS(SELECT * from filesrefrences where filesrefrences.ReferenceID= @FileRef and filesrefrences.RefrenceCount>1) then
update filesrefrences
set filesrefrences.RefrenceCount= filesrefrences.RefrenceCount-1
where filesrefrences.ReferenceID= @FileRef;
SELECT @FileRef;
ELSE
IF(@FileRef is Not NULL) THEN
DELETE from filesrefrences WHERE filesrefrences.ReferenceID = @FileRef;
SELECT -77;
ELSE
SELECT -99;
END IF;
END IF;
END //
DELIMITER ;
关于MySql 存储过程 else if 和多查询,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14180344/