if exists (select * from dbo.sysobjects where id = object_id(N’[dbo].[f_updatestr]’) and xtype in (N’FN’, N’IF’, N’TF’))
drop function [dbo].[f_updatestr]
GO
/*--更新字符串列表中,指定位置的字符串
更新字符串列表中,指定位置的字符串为新的值
如果位置超出范围,则不做更新--*/
/*--调用示例
select dbo.f_updatestr(’001|002|003|’,1,’00a’,’|’)
--*/
create function f_updatestr(
@s varchar(8000),
@pos int,
@newstr varchar(100),
@spliststr varchar(10) --字符串列表的分隔符
)returns varchar(8000)
as
begin
declare @i int,@ilen int
select @i=charindex(@spliststr,@spliststr+@s)
,@ilen=len(@spliststr)
while @i>0 and @pos>1
select @i=charindex(@spliststr,@s,@i)+@ilen
,@pos=@pos-1
return(case @i when 0 then @s else stuff(@s,@i,charindex(@spliststr,@s+@spliststr,@i)-@i,@newstr) end)
end
go
