sql函數返回數據集

USE [bpmdb]
GO


/****** Object:  UserDefinedFunction [dbo].[f_GetTree]    Script Date: 05/07/2015 12:44:16 ******/
SET ANSI_NULLS ON
GO


SET QUOTED_IDENTIFIER ON
GO


--模塊：查詢指定製定科目的彙總值
--時間：2014.12.23
--編寫人： lj


--SELECT a.Code, a.ouname, lvl
--FROM BPMSysOUs a
--    JOIN dbo.f_GetTree(59) b
--       ON  a.OUID = b.ID   where  OULevel ='部門'
       
       
       




ALTER FUNCTION [dbo].[f_GetTree]
(
    @ID AS INT=NULL
)
RETURNS @r TABLE
(
    ID INT,
    lvl INT,
    px VARBINARY(8000)
)
AS
BEGIN
    DECLARE @lvl INT   
    SET @lvl = 0 
   
    IF ISNULL(@ID,0)<>0
       INSERT @r VALUES(@ID,@lvl,CAST(@ID AS VARBINARY))
    ELSE
       INSERT @r
       SELECT OUID, @lvl ,CAST(OUID AS VARBINARY)
       FROM BPMSysOUs
       WHERE  ParentOUID is null 
        
    WHILE @@rowcount>0
    BEGIN
        SET @lvl = @lvl+1;  
        INSERT @r
        SELECT a.OUID, @lvl ,b.px+CAST(a.OUID AS VARBINARY)
        FROM BPMSysOUs a
        JOIN @r b
            ON  a.ParentOUID = b.ID
                AND b.lvl = @lvl-1
    END
    RETURN;
END


GO