MDX Scope for all attributes of a dimension - ssas

Question

I have a dimension X with 10 attributes 1..10. In order to make a custom calculation for measure Y within a scope I can write this statement:
SCOPE([X].[1].CHILDREN, [Measures].[Y]);
THIS = 1+1;
END SCOPE;
This will make sure that when dimension attribute 1 is selected together with Y then the result will be 2.
Is there any easy way of writing this to make sure it works for all attributes within dimension X instead of using a nested scope and explicitly defining it for all attributes?
Something like SCOPE([X].[*]) or similar?

Answer 1

Create one more calculated member like this:
CREATE MEMBER DimSelected AS
IIF(
[X].[1].CURRENTMEMBER IS [X].[1].[All]
AND
[X].[2].CURRENTMEMBER IS [X].[2].[All]
AND
[X].[3].CURRENTMEMBER IS [X].[3].[All]
AND
[X].[4].CURRENTMEMBER IS [X].[4].[All]
AND
[X].[5].CURRENTMEMBER IS [X].[5].[All]
AND
[X].[6].CURRENTMEMBER IS [X].[6].[All]
AND
[X].[7].CURRENTMEMBER IS [X].[7].[All]
AND
[X].[8].CURRENTMEMBER IS [X].[8].[All]
AND
[X].[9].CURRENTMEMBER IS [X].[9].[All]
AND
[X].[10].CURRENTMEMBER IS [X].[10].[All],
NULL,
1)
And modify your scope logic to below:
SCOPE([Measures].[Y]);
IF Measures.DimSelected = 1 THEN This = 1+1 END IF;
END SCOPE;
Alternatively if you just plan to ever select the dim on some given axis, below might work:
CREATE MEMBER MembersSelected AS
GENERATE(AXIS(1) AS a, a.current.item(0).unique_name)
CREATE member HasX as
IIF(instr(1,MembersSelected,"[X].") <> 0, "Yes", NULL)
Then modify your scope logic to below:
SCOPE([Measures].[Y]);
IF Measures.HasX = "Yes" THEN This = 1+1 END IF;
END SCOPE;