EXISTING Keyword (MDX)

Artykuł
02/13/2015

Forces a specified set to be evaluated within the current context.

Składnia

Existing Set_Expression

Arguments

Set_Expression
A valid Multidimensional Expressions (MDX) set expression.

Uwagi

By default, sets are evaluated within the context of the cube that contains the members of the set. The Existing keyword forces a specified set to be evaluated within the current context instead.

Example

The following example returns the count of the resellers whose sales have declined over the previous time period, based on user-selected State-Province member values evaluated using the Aggregate function. The Hierarchize (MDX) and DrilldownLevel (MDX) functions are used to return values for declining sales for product categories in the Product dimension. The Existing keyword forces the the set in the Filter function to be evaluated in the current context - that is, for the Washington and Oregon members of the State-Province attribute hierarchy.

WITH MEMBER Measures.[Declining Reseller Sales] AS
   Count
      (Filter
         (Existing
            (Reseller.Reseller.Reseller)
         , [Measures].[Reseller Sales Amount] < 
            ([Measures].[Reseller Sales Amount]
               ,[Date].Calendar.PrevMember
            )
        )
      )
MEMBER [Geography].[State-Province].x AS 
   Aggregate 
      ( {[Geography].[State-Province].&[WA]&[US]
         , [Geography].[State-Province].&[OR]&[US] } 
      )
SELECT NON EMPTY HIERARCHIZE 
      (AddCalculatedMembers 
         ( 
            {DrillDownLevel
               ({[Product].[All Products]}
               )
            } 
         ) 
      ) DIMENSION PROPERTIES PARENT_UNIQUE_NAME ON COLUMNS 
FROM [Adventure Works]
WHERE 
      ( [Geography].[State-Province].x
        , [Date].[Calendar].[Calendar Quarter].&[2003]&[4]
        ,[Measures].[Declining Reseller Sales]
      )