SELF_BEFORE_AFTER - 为什么不返回相关级别的成员? [英] SELF_BEFORE_AFTER - why aren't members from related levels returned?

问题描述

这是我的脚本:

WITH 
    SET [Set_TargetEmp] AS
        {
        FILTER(
            [Employee Department].AllMembers,
                (
                InStr(
                    1, 
                    [Employee].[Employee Department].currentmember.name, 
                    "REUBEN") <> 0
                ) 
            )
        }
SELECT
    DESCENDANTS(
        [Set_TargetEmp],
        [Employee].[Employee Department],
        SELF_BEFORE_AFTER)
    ON 1,
    {} ON 0
FROM [Adventure Works] 

我知道 [Set_TargetEmp] 如下:

那么为什么当我用可选的参数 SELF_BEFORE_AFTER 将它包装在函数 DESCENDANTS 中时，它不是 reuben 的相关部门和标题没有返回?

So why when I wrap it in the function DESCENDANTS with the optional arg SELF_BEFORE_AFTER isn't reuben's related Department and Title not returned ?

编辑

所以我进一步简化了上述内容.为什么下面不返回 Reuben 的头衔和部门 - 我认为 SELF_BEFORE_AFTER 的重点是也返回来自其他层次的亲属 [Employee].[Employee Department] ?

So I've simplified the above even further. Why doesn't the following return Reuben's title and department - I thought the point of SELF_BEFORE_AFTER was to also return relatives from the other levels of the hierarchy [Employee].[Employee Department] ?

SELECT
    DESCENDANTS(
        [Employee].[Employee Department].[Employee].[Reuben H. D'sa],
        [Employee].[Employee Department],
        SELF_BEFORE_AFTER)
    ON 1,
    {} ON 0
FROM [Adventure Works] 

推荐答案

Descendants 只返回后代，即.e.比第一个参数低的成员.您需要的是 Ancestor.但是 - 根据文档 - Ancestor 和 Ancestors 函数不允许将集合作为第一个参数.这意味着 - 假设您的集合可能包含多个成员 - 您必须使用 Generate 迭代[Set_TargetEmp] 的成员:

Descendants only returns descendants, i. e. members on a lower level than the first argument. What you require would be an Ancestor. But - according to the documentation - the Ancestor and Ancestors functions do not allow a set as first argument. This means that - assuming your set is meant to possibly contain more than one member - you would have to use Generate to iterate over the members of [Set_TargetEmp]:

WITH 
    SET [Set_TargetEmp] AS
        {
        FILTER(
            [Employee Department].AllMembers,
                (
                InStr(
                    1, 
                    [Employee].[Employee Department].currentmember.name, 
                    "REUBEN") <> 0
                ) 
            )
        }
SELECT
    {} ON 0,
    Generate([Set_TargetEmp] as e,
             {Ancestor(e.Current, [Employee].[Employee Department].[Department])}
            )
    ON 1
FROM [Adventure Works] 

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