CTE ebeveyn-çocuk gösteren kardeşi

Question

Özyineleme kullanarak bir ağaç görüntüleyen bir CTE sorgum var. Bu tüm ağacı görüntülerken harika çalışıyor. Ama ben ID olarak bir değişken olarak geçmek ve her geçerli düğüm için kardeşleri dahil etmek istiyorum.

deneme kodunda:

DECLARE @TT TABLE 
(
ID int, 
Name varchar(25), 
ParentID int, 
SortIndex int 
) 

INSERT @TT 
SELECT 1, 'A', NULL, 1 UNION ALL 
SELECT 2, 'B_1', 3, 1 UNION ALL 
SELECT 3, 'B', 1, 2 UNION ALL 
SELECT 4, 'B_2', 3, 2 UNION ALL 
SELECT 5, 'C', 1, 3 UNION ALL 
SELECT 6, 'C_2', 5, 2 UNION ALL 
SELECT 7, 'A_1', 1, 1 UNION ALL 
SELECT 8, 'A_2', 1, 2 UNION ALL 
SELECT 9, 'C_1', 5, 1 


;WITH CTETree 
AS 
(
    SELECT *, CAST(NULL AS VARCHAR(25)) AS ParentName, 1 AS Lev, 
    CAST(ROW_NUMBER() OVER(ORDER BY SortIndex) AS VARBINARY(MAX)) AS SortPath 
    FROM @TT 
    WHERE ParentID IS NULL 

    UNION ALL 

    SELECT F.*, CTETree.Name AS ParentName, Lev + 1, 
    SortPath + CAST(ROW_NUMBER() OVER(ORDER BY F.SortIndex) AS BINARY(32)) 
    FROM @TT AS F 
    INNER JOIN CTETree 
    ON F.ParentID = CTETree.ID 
) 

SELECT * FROM CTETree 
    ORDER BY SortPath 

/* 
DESIRED RESULT: 

WHEN ID = 3 PASSED IN: 

1 A NULL 1 NULL 1 
3 B 1 2 A 2 
2 B_1 3 1 B 3 
4 B_2 3 2 B 3 
5 C 1 3 A 2 

WHEN ID = 1 PASSED IN: 

1 A NULL 1 NULL 1 
3 B 1 2 A 2 
5 C 1 3 A 2 

WHEN ID = 9 PASSED IN: 

1 A NULL 1 NULL 1 
3 B 1 2 A 2 
5 C 1 3 A 2 
9 C_1 5 1 C 3 
6 C_2 5 2 C 3 

*/ 

SQL Fiddle: Ben A_1 olarak benzer şekilde A_2 kaybolur bir soruyla karşılaşmış Sadece bir kez http://sqlfiddle.com/#!3/d41d8/5526

Answer 1

. Bu nedenle istisna ekleyin (fıkrada). Bu kayıtlar bu ifadeyi VE f.ID silmek gerekiyorsa! = 7 VE f.ID! = 8.

DECLARE @ID int = 3 -- variable wich you want pass 
DECLARE @Matched int = (SELECT CASE WHEN ParentID = 1 THEN ID ELSE ParentID END FROM @TT WHERE ID = @ID) 
;WITH CTETree 
AS 
(
SELECT *, CAST(NULL AS VARCHAR(25)) AS ParentName, 1 AS Lev, 
     CAST(ROW_NUMBER() OVER(ORDER BY SortIndex) AS VARBINARY(MAX)) AS SortPath, 
     0 AS Matched 
FROM @TT 
WHERE ParentID IS NULL 
UNION ALL 
SELECT F.*, cte.Name AS ParentName, cte.Lev + 1, 
     SortPath + CAST(ROW_NUMBER() OVER(ORDER BY F.SortIndex) AS BINARY(32)), 
     CASE WHEN (cte.ID = 1 AND f.ID != 7 AND f.ID != 8) 
     OR (cte.ID = @Matched AND cte.Lev + 1 > 2) 
     THEN 1 END AS Matched 
FROM @TT AS F INNER JOIN CTETree cte 
ON F.ParentID = cte.ID 
) 
SELECT ID, Name, ParentID, SortIndex, ParentName, Lev FROM CTETree 
WHERE Matched IS NOT NULL 
ORDER BY SortPath 

SQLFiddle