create FUNCTION ReturnStatuText(@docStatu varchar(10)) 
RETURNS varchar(10) --返回返回值的数据类型
as
BEGIN
declare @result varchar(10)
select @result = (CASE @docStatu
			WHEN 'A' THEN '创建' 
			WHEN 'B' THEN '审核中' 
			WHEN 'C' THEN '已审核' 
			WHEN 'D' THEN '重新审核' 
			WHEN 'Z' THEN '暂存' 
			ELSE ''
		END)
RETURN @result
END