AS2005. Strange MDX behaviour.

Question

Hi, MDX gurus,

 

I have a unexplainable problem with pretty easy MDX.

 

Following MDX queries

 

//
select
Filter([Date].[Date].members,
[Date].[Date].CurrentMember.MemberValue = VBA![dateadd]("yyyy", -2, VBA![Date]()) )
on 0,
{} on 1
from [Adventure Works]

//
select
Filter([Date].[Date].members,
[Date].[Date].CurrentMember.MemberValue = CDate("11.07.2004"))
on 0,
{} on 1
from [Adventure Works]

provide the same result as expected.

 

This query

//
select
Filter([Date].[Calendar].[Month].members,
[Date].[Date].CurrentMember.MemberValue = CDate("11.07.2004"))
on 0,
{} on 1
from [Adventure Works]

returns as expected one member

 

but this query

select
Filter([Date].[Calendar].[Month].members,
[Date].[Date].CurrentMember.MemberValue = VBA![dateadd]("yyyy", -2, VBA![Date]()) )
on 0,
{} on 1
from [Adventure Works]

retuns nothing. This is strange, isn't it?
Can anybody explain it?

Thanks in advance,

Vladimir Chtepa

Answer 1

The puzzle for me is not why your fourth query doesn't return anything - I don't think it should - but why the third query does return July 2004. In your third query you're filtering the members on [Date].[Calendar].[Month] and for each one checking the currentmember on [Date].[Date] - but the currentmember should be the All Member on [Date].[Date] in all cases, as the following queries show:

with member measures.test as [Date].[Date].CurrentMember.membervalue

select measures.test on 0,

[Date].[Calendar].[Month].members on 1

from [Adventure Works]

and

with member measures.test as [Date].[Date].CurrentMember.membervalue = CDate("11/07/2004")

select measures.test on 0,

[Date].[Calendar].[Month].members on 1

from [Adventure Works]

Very strange...

Chris

Answer 2

I don't know why 3-d query returns "expected" result.

It will be great If anybody from developer team could explain it.