Question

我做了一个CTE查询，它可以在存储过程中正常工作，当我在查询编辑器中执行时（使用where语句）

但是当我尝试创建与View相同时（没有where语句）。并使用where语句执行此操作，我得到的数据不是递归的。我没有看到错误。

这是SP中的查询和查询编辑器，它工作正常。（SP中的Guid作为参数）

WITH recursiveTable(ParentApplicationRoleId, ChildApplicationRoleId)
AS
(
    SELECT ParentApplicationRoleId, ChildApplicationRoleId
        FROM ApplicationRoleParentChild
        WHERE ParentApplicationRoleId = '69BCC94B-2884-4270-B39E-A09669C1D658'
    UNION ALL
    SELECT ApplicationRoleParentChild.ParentApplicationRoleId, ApplicationRoleParentChild.ChildApplicationRoleId
        FROM ApplicationRoleParentChild
        INNER JOIN recursiveTable ON ApplicationRoleParentChild.ParentApplicationRoleId = recursiveTable.ChildApplicationRoleId   
)
/* Get all Childelements (from recursive Table) and add the ParentRoleId to this List */
SELECT ApplicationRole.Name AS RoleName
    FROM recursiveTable
    INNER JOIN ApplicationRole ON ApplicationRole.ApplicationRoleId = recursiveTable.ChildApplicationRoleId 
    UNION
    SELECT Name AS RoleName FROM ApplicationRole WHERE ApplicationRoleId = '69BCC94B-2884-4270-B39E-A09669C1D658'
OPTION(MAXRECURSION 32767)

结果我得到Result Image

View需要所有ApplicationRoles（包含所有Childroles）并且未经过滤，因为我在调用View时会使用过滤器。

如何在没有where语句的情况下更改它的CTE？

我以此为例。但它只返回'管理员'的直接成员我也从Childs中搜索Child。

WITH recursiveTable(ParentApplicationRoleId, ChildApplicationRoleId)
AS
(
    SELECT ParentApplicationRoleId, ChildApplicationRoleId
        FROM ApplicationRoleParentChild
    UNION ALL
    SELECT ApplicationRoleParentChild.ParentApplicationRoleId, ApplicationRoleParentChild.ChildApplicationRoleId
        FROM ApplicationRoleParentChild
        INNER JOIN recursiveTable ON ApplicationRoleParentChild.ParentApplicationRoleId = recursiveTable.ChildApplicationRoleId   
)
/* Get all Childelements (from recursive Table) and add the ParentRoleId to this List */
    SELECT ApplicationRole.Name AS ChildRoleName, Parent.Name AS ParentRoleName
    FROM recursiveTable
    INNER JOIN ApplicationRole ON ApplicationRole.ApplicationRoleId = recursiveTable.ChildApplicationRoleId 
    INNER JOIN ApplicationRole as Parent ON Parent.ApplicationRoleId = recursiveTable.ParentApplicationRoleId 

/*The Query-Filter when i call the View: Like SELECT * FROM View WHERE Parent.Name = 'Administrator'
    Expected Returns: Role1-10, Departement1-3 and Administrator
    Current Returns: Only direct Childs (Role2,7,8, Departement1,3)

    Departement2 is Child of Departement1
    And some other Roles are in one of the Departements or roles
*/

表： ApplicationRole（所有角色） ApplicationRoleParentChild（所有父子关系）（使用FK父级和FK子角色）

我希望有人可以帮助我。

由于

Answer 1

yor where子句过滤所有记录。更深层的记录没有直接的父管理员。要按其过滤，您可以将顶级记录名称存储为cte

中的列

WITH recursiveTable(ParentApplicationRoleId, ChildApplicationRoleId, TopLevelName)
AS
(
    SELECT ParentApplicationRoleId, ChildApplicationRoleId, Name
        FROM ApplicationRoleParentChild
    UNION ALL
    SELECT ApplicationRoleParentChild.ParentApplicationRoleId, ApplicationRoleParentChild.ChildApplicationRoleId
        , recursiveTable.TopLevelName
        FROM ApplicationRoleParentChild
        INNER JOIN recursiveTable ON ApplicationRoleParentChild.ParentApplicationRoleId = recursiveTable.ChildApplicationRoleId   
)

或者你甚至可以建立孩子的完整路径

   WITH recursiveTable(ParentApplicationRoleId, ChildApplicationRoleId, TopLevelName)
    AS
    (
        SELECT ParentApplicationRoleId, ChildApplicationRoleId, cast(Name as varchar(1000))
            FROM ApplicationRoleParentChild

        UNION ALL
        SELECT ApplicationRoleParentChild.ParentApplicationRoleId, ApplicationRoleParentChild.ChildApplicationRoleId
            , left(recursiveTable.TopLevelName + '/' + name, 1000)
            FROM ApplicationRoleParentChild
            INNER JOIN recursiveTable ON ApplicationRoleParentChild.ParentApplicationRoleId = recursiveTable.ChildApplicationRoleId   
    )

然后过滤where Parent.TopLevelName like '%Administrator%'

<强>更新如通知 Ivan Starostin 在他的评论中如果你不打算将每个记录的所有层次结构作为最高级别。您必须为cte中的第一个选择添加where子句以定义topLevel节点。类似ParentApplicationRoleId is NULL或ParentApplicationRoleId = ''

的内容

sql递归cte在视图中工作不正常

1 个答案: