Sql recursive error invalid column name CTE

Question

I have done following CTE it works fine,but I need to get sum of the last node so the problem is when I add T1.Debit Column to be calculated its give me an invalid column name 'Debit' !!! on line ***

ALTER Function [dbo].[SubTopics_GetSum]
 -- Add the parameters for the stored procedure here
    (
    @TopicID int
    )
RETURNS TABLE 
AS
RETURN 
(
    -- Add the SELECT statement with parameter references here
    WITH cte
    AS (
        SELECT
            T1.TopicID,
            T1.Code,
            T1.Description,
            T1.ParentID,
            T1.ParentID AS NewParentID,
            CAST(T1.Code AS nvarchar(MAX)) AS TopicCode,
            CAST(T1.Description AS nvarchar(MAX)) AS TopicDescription,
            isnull((Accounting.DocumentDetail.Debit),0) AS Debit,
            isnull((Accounting.DocumentDetail.Credit),0) AS Credit
        FROM Accounting.Topics AS T1
            LEFT OUTER JOIN Accounting.DocumentDetail
                ON T1.TopicID = Accounting.DocumentDetail.TopicFK
        where NOT EXISTS(
                        SELECT
                            T2.TopicID,
                            T2.Code,
                            T2.Description,
                            T2.ParentID,
                            isnull((Accounting.DocumentDetail.Debit),0) AS Debit,
                            isnull((Accounting.DocumentDetail.Credit),0) AS Credit
                        FROM Accounting.Topics AS T2
                            LEFT OUTER JOIN Accounting.DocumentDetail
                                ON T2.TopicID = Accounting.DocumentDetail.TopicFK
                        WHERE (ParentID = T1.TopicID)
                        )
        UNION ALL
        SELECT
            c.TopicID,
            c.Code,
            c.Description,
            c.ParentID,
            T1.ParentID AS NewParentID,
            CAST(T1.Code AS nvarchar(MAX)) + c.TopicCode AS TopicCode,
            CAST(T1.Description AS nvarchar(MAX)) + ' - ' + c.TopicDescription AS TopicDescription,
            ***   isnull((T1.Debit),0)+isnull(c.Debit,0) AS Debit,--IN THIS LINE error 'Invalid Column Name 'Debit''
            isnull(c.Credit,0) AS Credit
        FROM cte AS c
            INNER JOIN Accounting.Topics AS T1
                ON T1.TopicID = c.NewParentID
        )

    SELECT isnull(sum(Debit),0)AS Debit,
        isnull(sum(Credit),0)AS Credit
    FROM cte AS c
    WHERE (NewParentID = @TopicID)
)

let me know whats wrong with my code confused !!!

actually it doesn't return me a last node sum of debit,credit ... !!! check following pic

Answer 1

I think below code will help,

ALTER FUNCTION [dbo].[Subtopics_getsum] 
-- Add the parameters for the stored procedure here 
(@TopicID INT) 
returns TABLE 
AS 
    RETURN ( 
      -- Add the SELECT statement with parameter references here 
      WITH cte 
           AS (SELECT T1.topicid, 
                      T1.code, 
                      T1.description, 
                      T1.parentid, 
                      T1.parentid                                     AS 
                      NewParentID 
                      , 
                      Cast(T1.code AS NVARCHAR(max)) 
                      AS TopicCode, 
                      Cast(T1.description AS NVARCHAR(max))           AS 
                      TopicDescription, 
                      Isnull(( accounting.documentdetail.debit ), 0)  AS Debit, 
                      Isnull(( accounting.documentdetail.credit ), 0) AS Credit 
               FROM   accounting.topics AS T1 
                      LEFT OUTER JOIN accounting.documentdetail 
                                   ON T1.topicid = 
                                      accounting.documentdetail.topicfk 
               WHERE  NOT EXISTS(SELECT T2.topicid, 
                                        T2.code, 
                                        T2.description, 
                                        T2.parentid, 
    Isnull(( accounting.documentdetail.debit ), 0) 
    AS 
    Debit, 
    Isnull(( accounting.documentdetail.credit ), 0) AS 
    Credit 
    FROM   accounting.topics AS T2 
    LEFT OUTER JOIN accounting.documentdetail 
    ON T2.topicid = 
    accounting.documentdetail.topicfk 
    WHERE  ( parentid = T1.topicid ))) 
    SELECT Isnull(Sum(debit), 0) AS Debit, 
    Isnull(Sum(credit), 0)AS Credit 
    FROM   cte AS c 
    WHERE  ( newparentid = @TopicID )
    )

Answer 2

I think you Accounting.Topics hasn't column Debit.

UPDTAE

isnull((T1.Debit),0)+isnull(c.Debit,0) AS Debit,--IN THIS LINE error 'Invalid Column Name 'Debit'' isnull(c.Credit,0) AS Credit FROM cte AS c INNER JOIN Accounting.Topics AS T1 ON T1.TopicID = c.NewParentID

In the code above your T1.Debit refers to Accounting.Topics.