使用聚合过滤器计算成员的 MDX 查询太慢

【问题标题】：MDX Query using Aggregate Filter Calculated Member too slow使用聚合过滤器计算成员的 MDX 查询太慢
【发布时间】：2016-10-28 09:37:33
【问题描述】：

我是 MDX 的新手。我正在尝试在 SSRS 报告中运行以下 MDX 查询，并且需要很长时间才能完成运行它。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]
);

经过几次测试和谷歌搜索，我知道罪魁祸首是聚合过滤后的表单编号的计算成员。此外，[Form].[Number].[Number] 维度是一个拥有数十万成员的巨大维度。所以想知道如果我们在这样的维度中创建一个计算成员，这会减慢查询速度吗？如果是这样，有什么解决方法？

非常感谢

【问题讨论】：

    标签： reporting-services filter aggregate mdx


    【解决方案1】：

    CASE 和 FILTER 都是慢速 mdx 函数。对于微不足道的CASE，切换到通常性能更好的IIF 很容易——但是你有太多条件可以嵌套IIFs。

    可能有帮助的三点：

    1.我注意到您的案例陈述中有一个错误 - 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.你的WITH子句的运行顺序是错误的——这些不同的成员[Form].[Number].[97-100]是在CASE语句中使用后计算出来的。

    3.您对[Total Sales] 的计算我无法想象需要任何排序，那么为什么要使用有序集呢？事实上，您可以只使用带有层次结构 [All] 成员的元组来获取此值：

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

    所以我们现在有了上面的实现：

    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]
);

    【讨论】：

    • @user2463061 我发现了另一个严重的问题 - 您应该始终在 WITH 子句中将成员按正确的运行顺序排列。
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