mssql自定义函数中使用游标

create FUNCTION [dbo].[F_getsortname]
(
@pid varchar(1000)
)
RETURNS  nvarchar(4000)
AS
BEGIN
declare @name nvarchar(100)
declare @t nvarchar(4000)
DECLARE @MyCursor CURSOR
set @pid=','+@pid+','
--局部游标
set @MyCursor=CURSOR FOR select sortname from dbo.sort where  charindex(','+rtrim(sortid)+',', @pid)>0 --替换如in(1,2,3)
set @t=''
open @MyCursor
FETCH NEXT FROM @MyCursor INTO @name
while @@FETCH_STATUS = 0
begin
if len(@t)=0
begin
set @t=@name
end
else
begin
set @t=@t+','+@name
end
FETCH NEXT FROM @MyCursor INTO @name
end
CLOSE @MyCursor
DEALLOCATE @MyCursor
return @t
END