使用来自 Excel 客户端的 Subselect MDX 更改上下文

Question

我有两个时间维度，生产周期和会计周期，以及一个度量值，当用户从 excel 查询多维数据集时，我想与其中一个维度而不是两个维度进行聚合。为此，我创建了一个标志度量来检查是否同时使用了两个维度

CREATE MEMBER CURRENTCUBE.[Measures].[AcctProdFlag] AS  
    IIF (
       [DIM Accounting Period].[Accounting Period Hierarchy].CURRENTMEMBER.level.ordinal <> 0 and 
          [DIM Production Period].[Production Month Hierarchy].currentmember.level.ordinal = 0 , 
      1, 
 IIF ( [DIM Production Period].[Production Month Hierarchy].currentmember.level.ordinal <> 0 and 
       [DIM Accounting Period].[Accounting Period Hierarchy].currentmember.level.ordinal = 0 , 
      2, 
      3
     )
), VISIBLE =0;

然后我使用这个标志来创建我的度量

CREATE MEMBER CURRENTCUBE.[Measures].[Sales/day] AS 

  IIF([Measures].[AcctProdFlag] = 1 , 
      ([Measures].[Sales] / [Measures].[Accounting Period Day Count]),
   IIF([Measures].[AcctProdFlag] = 2, 
       ([Measures].[Sales] / [Measures].[Production Period Day Count]), 
        "NA")),
VISIBLE = 1, DISPLAY_FOLDER = 'Sales\Daily' , FORMAT_STRING = "#,###";

当我使用来自 Management Studio 的查询时，它正常工作并且 returns "NA" 正如预期的那样，因为两个维度都被使用

SELECT {[Measures].[Sales/day]} ON COLUMNS , 
       [DIM Production Period].[Production Month].MEMBERS ON ROWS  
 FROM [My Cube] 
 WHERE {[DIM Accounting Period].[Accounting Year].[2014], 
         [DIM Accounting Period].[Accounting Year].[2015]};

但是，当我在 excel 中添加会计年度进行过滤并在行中添加生产期间时，当我 select 多个会计年度时，度量显示值（它不应该按照逻辑）但是当我 select 一个会计年度时显示 "NA" （正如预期的那样）。事实证明，当我 select 多年后，excel 将以下查询发送到 SSAS，导致它丢失上下文

 SELECT {[Measures].[Sales/day]} ON COLUMNS , 
         [DIM Production Period].[Production Month].MEMBERS ON ROWS 
FROM (SELECT (
              {[DIM Accounting Period].[Accounting Year].[2014],[DIM Accounting Period].[Accounting Year].[2015]}
              ) ON COLUMNS
       FROM [My Cube]
     )

我能做些什么来解决这个问题吗？我正在为 SQL Server 2008 R2 和 Excel 2013 使用 SSAS。

Answer 1

一种方法是动态命名集，如 "Using dynamic sets to detect subselects" 部分中 post 所述。

另一种方法是在仅连接到该维度的 DimAccountingPeriod 之上构建一个度量值组并构建一个计数度量值。然后测试Dim Accounting Period是否没有过滤器：

IIf(
 [Measures].[Accounting Period Count] = ([Measures].[Accounting Period Count], [DIM Accounting Period].[Accounting Period Hierarchy].[All])
 ,1
 ,0
)

进一步扩展您将如何使用它：

CREATE MEMBER CURRENTCUBE.[Measures].[AcctProdFlag] AS  
    IIF (
       [Measures].[Accounting Period Count] < ([Measures].[Accounting Period Count], [DIM Accounting Period].[Accounting Period Hierarchy].[All]) and 
          [Measures].[Production Period Count] = ([Measures].[Production Period Count], [DIM Production Period].[Production Month Hierarchy].[All]) , 
      1, 
 IIF ( [Measures].[Production Period Count] < ([Measures].[Production Period Count], [DIM Production Period].[Production Month Hierarchy].[All]) and 
       [Measures].[Accounting Period Count] = ([Measures].[Accounting Period Count], [DIM Accounting Period].[Accounting Period Hierarchy].[All]) , 
      2, 
      3
     )
), VISIBLE =0;

您可以尝试动态集方法，但度量方法的效果最好。

Answer 2

所以我最终做了以下事情来解决这个问题。我在数据源视图中创建了两个度量为 NULL 并调用了它们； [Measures].[Prod Months Used] 和 [Measures].[Acct Months Used] 我还创建了计算成员来计算所有生产月份和所有会计月份。那些工作是这样的 -- 创建此度量是为了计算立方体中的生产月数

CREATE MEMBER CURRENTCUBE.[Measures].[AllProdMonths] AS 

    SUM(
      DESCENDANTS(
                   [DIM Production Period].[Production Month Hierarchy].[All],
                    [DIM Production Period].[Production Month Hierarchy].[Production Month], SELF
                   )
       , 1
       ), VISIBLE=0 ; 

-- This measure is created to count the number of accounting months in the cube
CREATE MEMBER CURRENTCUBE.[Measures].[AllAcctMonths] AS 

    SUM(
      DESCENDANTS(
                   [DIM Accounting Period].[Accounting Period Hierarchy].[All],
                    [DIM Accounting Period].[Accounting Period Hierarchy].[Accounting Month], SELF
                   )
       , 1
       ), VISIBLE =0;

最后，为了计算使用的会计月数和生产月数，我执行了以下操作：

-- This measure is scoped to count the number of used Production months in excel (including filters) 
-- It does that by overwritting all values except the All member. 
SCOPE (
          ([Measures].[Prod Months Used],
          [DIM Production Period].[Production Month Hierarchy].[Production Month].MEMBERS)
       ); 
 SCOPE DESCENDANTS(
                   [DIM Production Period].[Production Month Hierarchy].[All],, AFTER
                  );

      THIS =   1; 
          END SCOPE; 
 END SCOPE; 



-- This measure is scoped to count the number of used Accounting months in excel (including filters) 
-- It does that by overwritting all values except the All member. 
SCOPE (
          ([Measures].[Acct Months Used],
          [DIM Accounting Period].[Accounting Period Hierarchy].[Accounting Month].MEMBERS)
       ); 
 SCOPE DESCENDANTS(
                   [DIM Accounting Period].[Accounting Period Hierarchy].[All],, AFTER
                  );

      THIS =   1; 
          END SCOPE; 
 END SCOPE;

我的标志将根据以下表达式进行评估

CREATE MEMBER CURRENTCUBE.[Measures].[AcctProdFlag] AS  

    IIF (
            [Measures].[Acct Months Used] < [Measures].[AllAcctMonths] AND 
            [Measures].[Prod Months Used] = [Measures].[AllProdMonths], 
      1, 
 IIF ( [Measures].[Acct Months Used] = [Measures].[AllAcctMonths] AND 
            [Measures].[Prod Months Used] < [Measures].[AllProdMonths] , 
      2, 
      3
     )
), VISIBLE =0;

此解决方案运行良好，性能非常好。

使用来自 Excel 客户端的 Subselect MDX 更改上下文

Change the context with Subselect MDX from Excel client

ssas

mdx

cube

sql-server-2008-r2