mssql server 数据库存储过程转换成mysql数据库

mssql server 数据库教程存储过程转换成mysql教程数据库

DELIMITER $$
DROP PROCEDURE IF EXISTS ChangeSequence$$
CREATE PROCEDURE ChangeSequence
(
_sign INT ,-- 0： 上移 1：下移 
TableName VARCHAR(50) ,-- 表名 
ItemName VARCHAR(50) ,-- 主键字段名 
ItemID INT , -- 主键ID 
SortName VARCHAR(50) , -- 排序ID 
TypeName VARCHAR(50) , -- 分类字段名 
TypeValue VARCHAR(50) -- 分类值 
)
BEGIN
DECLARE _SQL VARCHAR(4000);
DECLARE ThisSort INT;
DECLARE PREVID INT;
DECLARE NextID INT;
DECLARE _Count INT; 

CREATE TEMPORARY TABLE _Tab
(
_ItemID INT, 
_Sort INT 
);
SET _SQL=CONCAT('INSERT INTO _Tab (_ItemID,_Sort) SELECT ' ,ItemName,SortName,' FROM ',TableName) ;

IF (TypeName<>'' AND TypeValue<>'') THEN
  SET _SQL=CONCAT(_SQL,' where ',TypeName,'=',TypeValue);
END IF;
SET _SQL = CONCAT(_SQL,' ORDER BY _Sort ASC ') ;
SET @v_sql=_SQL;
PREPARE stmt FROM @v_sql;
EXECUTE stmt; 
DEALLOCATE PREPARE stmt;
SET _SQL = '';

SELECT COUNT(*) INTO _Count FROM _Tab ;
SELECT Sort INTO ThisSort FROM _Tab WHERE _ItemID = ItemID; 
IF(ThisSort>1) THEN 
  SELECT _ItemID INTO PREVID FROM _Tab WHERE _Sort=(ThisSort-1); 
END IF;
IF(ThisSort<_Count) THEN SELECT _ItemID INTO NextID FROM _Tab WHERE _Sort=(ThisSort+1);END IF; 

IF(_Sign=0) THEN 
  IF(ThisSort>1) THEN
  SET _SQL = CONCAT('UPDATE ',TableName,' SET ',SortName,'=','CONVERT((',ThisSort,'-1),varchar(100))',' WHERE ',ItemName,' = ','CONVERT(',ItemID,',varchar(100))' , ';' ,
  'UPDATE ',TableName,' SET ',SortName,'=','CONVERT(',ThisSort,',varchar(100))',' WHERE ',ItemName,' = ','CONVERT(',PREVID,',varchar(100))'); 
  END IF;
ELSE
  IF(ThisSort<_Count) THEN
  SET _SQL =CONCAT( 'UPDATE ',TableName,' SET ',SortName,'=','CONVERT((',ThisSort,'+1),varchar(100))',' WHERE ',ItemName,' = ','CONVERT(',ItemID,',varchar(100))',';',
  'UPDATE ',TableName,' SET ',SortName,'=','CONVERT(',ThisSort,',varchar(100))',' WHERE ',ItemName,' = ','CONVERT(',NextID,',varchar(100))'); 
  END IF;
END IF;
SET @v_sql1=_SQL;
PREPARE stmt1 FROM @v_sql1;
EXECUTE stmt1; 
DEALLOCATE PREPARE stmt1;
END$$