SQL批量更新具有树形结构表Path字段

Create FUNCTION  [dbo].[F_Org]
(    
@id int 
)
RETURNS TABLE 
AS
RETURN 
(
with testTable 
as(
select UpperID from Core_DeptInfo  
where ID=@id union all 
select Core_DeptInfo.UpperID from Core_DeptInfo,testTable 
where Core_DeptInfo.ID=testTable .UpperID)
 select UpperID  from testTable   
)

declare @minId int 
declare @maxId int 
declare @result nvarchar(50)
declare @count int
select  @minId = MIN(id) from Core_DeptInfo
select  @maxId = MAX(id) from Core_DeptInfo

WHILE @maxId >=@minId
BEGIN
    select @count = COUNT(1) from Core_DeptInfo where  ID=@maxId;
    if @count=1
    begin
        select @result = (select  CONVERT(nvarchar(50),UpperID) +‘.‘  from dbo.F_Org(@maxId) order by UpperID    for xml path(‘‘)  )  
        set @result = LEFT(@result,LEN(@result)-1)  
        update Core_DeptInfoExtend set Path=@result where ID=@maxId
    end      
    SET @maxId = @maxId -1
END