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使用聚合筛选器计算成员的MDX查询太慢

[英]MDX Query using Aggregate Filter Calculated Member too slow

 原文  2016-10-28 09:37:33  3   1    reporting-services/ filter/ aggregate/ mdx

问题描述

I am new to MDX. 我是MDX的新手。 I am trying to run the following MDX Query in an SSRS report and it is taking ages to finish running it. 我正在尝试在SSRS报表中运行以下MDX查询，并且要花一些时间才能完成运行。 Sometimes I have to cancel the Query because it is too slow. 有时我不得不取消查询，因为它太慢了。 

WITH 
  --All forms ordered ASC
  SET [OrderedSet] AS 
    Order
    (
      NonEmpty
      (
        [Form].[Number].[Number]
       ,[Measures].[Sales]
      )
     ,[Measures].[Sales]
     ,BASC
    ) 
  --Rank the forms in [orderedSet]
  MEMBER [Measures].[Rank] AS 
    Rank
    (
      [Form].[Number].CurrentMember
     ,[OrderedSet]
    ) 
  --Running Total
  MEMBER [Measures].[Running Total] AS 
    Sum
    (
      Head
      (
        [OrderedSet]
       ,(
          [Measures].[Rank]
         ,[Form].[Number].CurrentMember
        )
      )
     ,[Measures].[Sales]
    ) 
  --Total Sales
  MEMBER [Measures].[Total Sales] AS 
    Sum
    (
      [OrderedSet]
     ,[Measures].[Sales]
    ) 
  --Find the spending band Sales limits
  MEMBER [Measures].[3%Sales] AS 
    0.03 * [Measures].[Total Sales] 
  MEMBER [Measures].[8%Sales] AS 
    0.08 * [Measures].[Total Sales] 
  MEMBER [Measures].[18%Sales] AS 
    0.18 * [Measures].[Total Sales] 
  MEMBER [Measures].[38%Sales] AS 
    0.38 * [Measures].[Total Sales] 
  MEMBER [Measures].[62%Sales] AS 
    0.62 * [Measures].[Total Sales] 
  MEMBER [Measures].[82%Sales] AS 
    0.82 * [Measures].[Total Sales] 
  MEMBER [Measures].[92%Sales] AS 
    0.92 * [Measures].[Total Sales] 
  MEMBER [Measures].[97%Sales] AS 
    0.97 * [Measures].[Total Sales] 
  --Assign Sales limits for each spending bands
  MEMBER [Measures].[MinSales] AS 
    CASE 
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[0-3] 
      THEN 1
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[3-8] 
      THEN 
        [Measures].[3%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[8-18] 
      THEN 
        [Measures].[8%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[18-38] 
      THEN 
        [Measures].[18%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[38-62] 
      THEN 
        [Measures].[38%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[62-82] 
      THEN 
        [Measures].[62%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[82-92] 
      THEN 
        [Measures].[82%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[92-97] 
      THEN 
        [Measures].[92%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[97-100] 
      THEN 
        [Measures].[97%Sales]
    END 
  MEMBER [Measures].[MaxSales] AS 
    CASE 
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[0-3] 
      THEN 
        [Measures].[3%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[3-8] 
      THEN 
        [Measures].[8%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[8-18] 
      THEN 
        [Measures].[18%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[18-38] 
      THEN 
        [Measures].[38%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[38-62] 
      THEN 
        [Measures].[62%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[62-82] 
      THEN 
        [Measures].[82%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[82-92] 
      THEN 
        [Measures].[92%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[92-97] 
      THEN 
        [Measures].[97%Sales]
      WHEN 
        [Form].[Number].CurrentMember = [Form].[Number].[97-100] 
      THEN 
        [Measures].[Total Sales]
    END 
  --Create Spending bands based on the Running Total ranges
  MEMBER [Form].[Number].[0-3] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > 0
        AND 
          [Measures].[Running Total] <= [Measures].[3%Sales]
      )
    ) 
  MEMBER [Form].[Number].[3-8] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[3%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[8%Sales]
      )
    ) 
  MEMBER [Form].[Number].[8-18] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[8%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[18%Sales]
      )
    ) 
  MEMBER [Form].[Number].[18-38] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[18%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[38%Sales]
      )
    ) 
  MEMBER [Form].[Number].[38-62] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[38%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[62%Sales]
      )
    ) 
  MEMBER [Form].[Number].[62-82] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[62%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[82%Sales]
      )
    ) 
  MEMBER [Form].[Number].[82-92] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[82%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[92%Sales]
      )
    ) 
  MEMBER [Form].[Number].[92-97] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[92%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[97%Sales]
      )
    ) 
  MEMBER [Form].[Number].[97-100] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[97%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[Total Sales]
      )
    ) 
SELECT 
  NON EMPTY 
    {
      [Measures].[MinSales]
     ,[Measures].[MaxSales]
     ,[Measures].[Form Count]
     ,[Measures].[Sales]
    } ON 0
 ,{
    [Form].[Number].[0-3]
   ,[Form].[Number].[3-8]
   ,[Form].[Number].[8-18]
   ,[Form].[Number].[18-38]
   ,[Form].[Number].[38-62]
   ,[Form].[Number].[62-82]
   ,[Form].[Number].[82-92]
   ,[Form].[Number].[92-97]
   ,[Form].[Number].[97-100]
  } ON 1
FROM 
(
  SELECT 
    [blah] ON COLUMNS
  FROM [Cube]
);

After few tests and google search, I know that the culprit is the calculated member that aggregates the filtered Form Numbers. 经过几次测试和Google搜索后，我知道罪魁祸首是汇总过滤后的表格编号的计算成员。 Also the [Form].[Number].[Number] dimension is a huge dimension with hundreds of thousands of members. [Form]。[Number]。[Number]维度也是一个巨大的维度，具有成千上万的成员。 So was wondering if we create a calculated member in such a dimension, would that slow down the query and if so what can be a workaround? 因此，想知道我们是否在这样的维度上创建一个计算成员，这会减慢查询速度吗？

Many Thanks 非常感谢

1 个解决方案

解决方案1
 0  2016-10-28 12:18:13

CASE and FILTER are both slow mdx functions. CASE和FILTER都是慢速mdx函数。 For a trivial CASE it is easy enough to switch to IIF which generally performs better - but you have too many conditions to nest IIF s. 对于平凡的CASE ，切换到通常表现更好的IIF很容易-但是您嵌套IIF的条件太多。

Three points that might help: 三点可能会有所帮助：

1.I noticed that you have a mistake in your case statements - you should be using the IS operator rather than the = 1.我注意到您的case语句有误-您应该使用IS运算符而不是= 

CASE 
  WHEN 
    [Form].[Number].CurrentMember IS [Form].[Number].[0-3] 
  THEN 1
  WHEN 
    [Form].[Number].CurrentMember IS [Form].[Number].[3-8] 
  THEN 
    [Measures].[3%Sales]
  WHEN 
    [Form].[Number].CurrentMember IS [Form].[Number].[8-18] 
  THEN 
    [Measures].[8%Sales]
  WHEN 
    [Form].[Number].CurrentMember IS [Form].[Number].[18-38] 
  THEN 
    [Measures].[18%Sales]
  WHEN 
    [Form].[Number].CurrentMember IS [Form].[Number].[38-62] 
  THEN 
    [Measures].[38%Sales]
  WHEN 
    [Form].[Number].CurrentMember IS [Form].[Number].[62-82] 
  THEN 
    [Measures].[62%Sales]
  WHEN 
    [Form].[Number].CurrentMember IS [Form].[Number].[82-92] 
  THEN 
    [Measures].[82%Sales]
  WHEN 
    [Form].[Number].CurrentMember IS [Form].[Number].[92-97] 
  THEN 
    [Measures].[92%Sales]
  WHEN 
    [Form].[Number].CurrentMember IS [Form].[Number].[97-100] 
  THEN 
    [Measures].[97%Sales]
END

2.The running order of your WITH clause is wrong - these various members [Form].[Number].[97-100] are calculated after they are used in the CASE statements. 2. WITH子句的运行顺序错误-这些各种成员[Form].[Number].[97-100]是在CASE语句中使用后计算出来的。

3.The calculation you have for [Total Sales] I cannot imagine will require any sort of ordering so why use the ordered set? 3.您无法想象的[Total Sales]计算将需要任何排序，那么为什么要使用排序集？ I fact you could just use a tuple with the [All] member of the hierarchy to get this value: 我确实可以将一个元组与层次结构的[All]成员一起使用来获取此值： 

--Total Sales
MEMBER [Measures].[Total Sales] AS 
(
  [Form].[Number].[All]
 ,[Measures].[Sales]
)

So implementing the above we now have: 因此，实现以上内容，我们现在有： 

WITH 
  --All forms ordered ASC
  SET [OrderedSet] AS 
    Order
    (
      NonEmpty
      (
        [Form].[Number].[Number]
       ,[Measures].[Sales]
      )
     ,[Measures].[Sales]
     ,BASC
    ) 
  --Rank the forms in [orderedSet]
  MEMBER [Measures].[Rank] AS 
    Rank
    (
      [Form].[Number].CurrentMember
     ,[OrderedSet]
    ) 
  --Running Total
  MEMBER [Measures].[Running Total] AS 
    Sum
    (
      Head
      (
        [OrderedSet]
       ,(
          [Measures].[Rank]
         ,[Form].[Number].CurrentMember
        )
      )
     ,[Measures].[Sales]
    ) 
  --Total Sales
  MEMBER [Measures].[Total Sales] AS 
  (
    [Form].[Number].[All]
   ,[Measures].[Sales]
  )
  --Find the spending band Sales limits
  MEMBER [Measures].[3%Sales] AS 
    0.03 * [Measures].[Total Sales] 
  MEMBER [Measures].[8%Sales] AS 
    0.08 * [Measures].[Total Sales] 
  MEMBER [Measures].[18%Sales] AS 
    0.18 * [Measures].[Total Sales] 
  MEMBER [Measures].[38%Sales] AS 
    0.38 * [Measures].[Total Sales] 
  MEMBER [Measures].[62%Sales] AS 
    0.62 * [Measures].[Total Sales] 
  MEMBER [Measures].[82%Sales] AS 
    0.82 * [Measures].[Total Sales] 
  MEMBER [Measures].[92%Sales] AS 
    0.92 * [Measures].[Total Sales] 
  MEMBER [Measures].[97%Sales] AS 
    0.97 * [Measures].[Total Sales] 
  --Create Spending bands based on the Running Total ranges
  MEMBER [Form].[Number].[0-3] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > 0
        AND 
          [Measures].[Running Total] <= [Measures].[3%Sales]
      )
    ) 
  MEMBER [Form].[Number].[3-8] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[3%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[8%Sales]
      )
    ) 
  MEMBER [Form].[Number].[8-18] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[8%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[18%Sales]
      )
    ) 
  MEMBER [Form].[Number].[18-38] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[18%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[38%Sales]
      )
    ) 
  MEMBER [Form].[Number].[38-62] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[38%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[62%Sales]
      )
    ) 
  MEMBER [Form].[Number].[62-82] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[62%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[82%Sales]
      )
    ) 
  MEMBER [Form].[Number].[82-92] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[82%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[92%Sales]
      )
    ) 
  MEMBER [Form].[Number].[92-97] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[92%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[97%Sales]
      )
    ) 
  MEMBER [Form].[Number].[97-100] AS 
    Aggregate
    (
      Filter
      (
        [OrderedSet]
       ,
          [Measures].[Running Total] > [Measures].[97%Sales]
        AND 
          [Measures].[Running Total] <= [Measures].[Total Sales]
      )
    ) 
  --Assign Sales limits for each spending bands
  MEMBER [Measures].[MinSales] AS 
    CASE 
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[0-3] 
      THEN 1
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[3-8] 
      THEN 
        [Measures].[3%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[8-18] 
      THEN 
        [Measures].[8%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[18-38] 
      THEN 
        [Measures].[18%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[38-62] 
      THEN 
        [Measures].[38%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[62-82] 
      THEN 
        [Measures].[62%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[82-92] 
      THEN 
        [Measures].[82%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[92-97] 
      THEN 
        [Measures].[92%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[97-100] 
      THEN 
        [Measures].[97%Sales]
    END 
  MEMBER [Measures].[MaxSales] AS 
    CASE 
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[0-3] 
      THEN 
        [Measures].[3%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[3-8] 
      THEN 
        [Measures].[8%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[8-18] 
      THEN 
        [Measures].[18%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[18-38] 
      THEN 
        [Measures].[38%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[38-62] 
      THEN 
        [Measures].[62%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[62-82] 
      THEN 
        [Measures].[82%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[82-92] 
      THEN 
        [Measures].[92%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[92-97] 
      THEN 
        [Measures].[97%Sales]
      WHEN 
        [Form].[Number].CurrentMember IS [Form].[Number].[97-100] 
      THEN 
        [Measures].[Total Sales]
    END 
SELECT 
  NON EMPTY 
    {
      [Measures].[MinSales]
     ,[Measures].[MaxSales]
     ,[Measures].[Form Count]
     ,[Measures].[Sales]
    } ON 0
 ,{
    [Form].[Number].[0-3]
   ,[Form].[Number].[3-8]
   ,[Form].[Number].[8-18]
   ,[Form].[Number].[18-38]
   ,[Form].[Number].[38-62]
   ,[Form].[Number].[62-82]
   ,[Form].[Number].[82-92]
   ,[Form].[Number].[92-97]
   ,[Form].[Number].[97-100]
  } ON 1
FROM 
(
  SELECT 
    [blah] ON COLUMNS
  FROM [Cube]
);

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