SQL Server CTE語句Varbinary（MAX）不返回RootID

Question

我有一個層次結構表來存儲二叉樹。 我正在使用遞歸查詢來檢索基於IntroducerID的樹級別作為“RootID”。 返回的值與我預期的一樣，但在AgentId數字增量達到116之后 ，此CTE查詢不會以層次結構形式返回Level值。

就像它無法追蹤RootID一樣。

這是我的表結構的樣子;

CREATE TABLE [dbo].[TblHierarchy]
(
      [ID] [bigint] IDENTITY(1,1) NOT NULL,
      [AgentID] [bigint] NULL,
      [AgentName] [varchar](50) NULL,
      [RootID] [bigint] NULL,
      [IntroducerID] [bigint] NULL,
      [Description] [varchar](50) NULL,
      [HierarchyTree] [hierarchyid] NULL
) ON [PRIMARY]

以下是表格中的樣本數據;

INSERT [dbo].[TblHierarchy] ([ID], [AgentID], [AgentName], [RootID], [IntroducerID], [Description], [HierarchyTree]) 
VALUES (1, 1, N'Toh', 0, NULL, N'', NULL)

INSERT [dbo].[TblHierarchy] ([ID], [AgentID], [AgentName], [RootID], [IntroducerID], [Description], [HierarchyTree]) 
VALUES (2, 2, N'Man', 1, 0, N'Child of Toh', NULL)

INSERT [dbo].[TblHierarchy] ([ID], [AgentID], [AgentName], [RootID], [IntroducerID], [Description], [HierarchyTree]) 
VALUES (3, 3, N'Rul', 1, 0, N'Child of Toh', NULL)

INSERT [dbo].[TblHierarchy] ([ID], [AgentID], [AgentName], [RootID], [IntroducerID], [Description], [HierarchyTree]) 
VALUES (4, 4, N'Rafiq', 2, 2, N'Child of Man', NULL)

INSERT [dbo].[TblHierarchy] ([ID], [AgentID], [AgentName], [RootID], [IntroducerID], [Description], [HierarchyTree]) 
VALUES (5, 5, N'Paan', 2, 2, N'Child of Man', NULL)

這是檢索信息的查詢。

WITH CTE AS
(
    SELECT 
        H1.AgentID,
        H1.RootID,
        H1.AgentName,
        H1.Description [Parent],
        Description [Self Description],
        CAST(AgentID AS varbinary(MAX)) [Level],
        CAST (h1.AgentID AS varchar(max)) [LevelID],
        CAST (H1.IntroducerID AS varchar(max)) [IntroducerID]
    FROM 
        TblHierarchy H1
    WHERE 
        H1.RootID = 3

    UNION ALL 

    SELECT 
        H2.AgentID,
        H2.RootID,
        H2.AgentName,
        c.[Self Description],
        Description [Self Description],
        c.[Level]+CAST(h2.AgentID AS varbinary(MAX)) AS [Level] ,
        c.[LevelID] + '>' + CAST (h2.AgentID AS varchar(max)) [LevelID],
        CAST (H2.IntroducerID AS varchar(max)) [IntroducerID]
    FROM
        TblHierarchy H2
    INNER JOIN 
        CTE c ON h2.RootID = c.AgentID
)
SELECT *
FROM CTE 
CROSS APPLY 
    (SELECT 
         SUBSTRING(LevelID, 1, CHARINDEX('>', LevelID + '>') - 1) ) c(RootLevelID) 
ORDER BY 
    [Level] DESC
OPTION (MAXRECURSION 0) 

Answer 1

我並不完全了解你的需求（尤其是你想要通過所有這些演員實現的目標...），但請檢查一下：

編輯：經過一番思考，我希望得到它

我刪除了之前的建議，我必須更改輸入數據。 以下內容使用您的輸入數據不變，並通過AgentID和RootID進行鏈接。

CREATE TABLE [dbo].[TblHierarchy](
      [ID] [bigint] IDENTITY(1,1) NOT NULL,
      [AgentID] [bigint] NULL,
      [AgentName] [varchar](50) NULL,
      [RootID] [bigint] NULL,
      [IntroducerID] [bigint] NULL,
      [Description] [varchar](50) NULL,
      [HierarchyTree] [hierarchyid] NULL
      ) ON [PRIMARY];


INSERT [dbo].[TblHierarchy] ( [AgentID], [AgentName], [RootID], [IntroducerID], [Description], [HierarchyTree]) 
VALUES 
( 1, N'Toh', 0, NULL, N'', NULL)
,( 2, N'Man', 1, 0, N'Child of Toh', NULL)
,( 3, N'Rul', 1, 0, N'Child of Toh', NULL)
,( 4, N'Rafiq', 2, 2, N'Child of Man', NULL)
,( 5, N'Paan', 2, 2, N'Child of Man', NULL)

SELECT * FROM dbo.TblHierarchy;

WITH recCTE AS
(
    SELECT h.ID
          ,h.AgentID
          ,h.AgentName
          ,h.RootID
          ,h.IntroducerID
          ,h.[Description]
          ,CAST(h.[Description] AS VARCHAR(MAX)) AS HierDescr
    FROM dbo.TblHierarchy AS h WHERE h.IntroducerID IS NULL

    UNION ALL

    SELECT h.ID
          ,h.AgentID
          ,h.AgentName
          ,h.RootID
          ,h.IntroducerID
          ,h.[Description]
          ,r.HierDescr + '/' + h.[Description]
    FROM recCTE AS r
    INNER JOIN dbo.TblHierarchy AS h ON h.RootID=r.AgentID
)
SELECT * FROM recCTE
GO
DROP TABLE [dbo].[TblHierarchy];