SQL 服务器 CTE 语句 Varbinary(MAX) 未返回 RootID

Question

我有一个层次结构 table 来存储二叉树。我正在使用递归查询来检索基于 IntroducerID 作为 "RootID" 的树级别。值 return 符合我的预期，但在 AgentId 数字增量达到 116 后，此 CTE 查询没有 return 级别值分层形式。

好像它无法再跟踪 RootID。

这就是我的 table 结构的样子；

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]

下面是来自 table;

的示例数据

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)

这是检索信息的查询。

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

我不完全理解你的需求（尤其是你试图通过所有这些铸造来实现的......），但请检查一下：

编辑：经过一番思考，我希望我明白了

我删除了之前的建议，我不得不更改您的输入数据。以下使用未更改的输入数据并通过 AgentID 和 RootID 链接。

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];

SQL 服务器 CTE 语句 Varbinary(MAX) 未返回 RootID

SQL Server CTE statement Varbinary(MAX) Not Returning the RootID

sql

sql-server

stored-procedures

common-table-expression

varbinarymax

编辑：经过一番思考，我希望我明白了