Different results for MDX queries when using Attribute Hierarchies

We receive different results for the follow 2 MDX expressions. The only difference is that the second parameter in the Where clause uses a separate dimension called Asset Class in the first query, whereas in the first it uses an Attribute Hierarchy dimension on the Asset dimension.

The first provides the expected results which is the top 10 Equity assets, whereas the second returns just 3 Equity assets which belong to the top 10 assets overall.

Can anyone explain this? Using a cross join in the Topcount function works, but unfortunately ProClarity which we are using does not deal with this properly.

Query 1

SELECT NON EMPTY { [Measures].[Value Base] } ON COLUMNS ,

NON EMPTY { TOPCOUNT( { [Asset].[Asset].[All].CHILDREN }, 10, ( [Measures].[Value Base] ) ) } ON ROWS

FROM [MIQB Daily]

WHERE ( [Period].[Month].&[2005-11-01T00:00:00], [Asset Class].[Asset Class Category].&[Equity])

Query 2

SELECT NON EMPTY { [Measures].[Value Base] } ON COLUMNS ,

NON EMPTY { TOPCOUNT( { [Asset].[Asset].[All].CHILDREN }, 10, ( [Measures].[Value Base] ) ) } ON ROWS

FROM [MIQB Daily]

WHERE ( [Period].[Year Month Hierarchy].[Month].&[2005-11-01T00:00:00], [Asset].[Asset Class Hierarchy].[Asset Class Category].&[Equity )

At first sight this might be an issue with your attribute relationships. Have you looked into that?|||

Yes we believe the relations have been set up correctly and the indicator on the hierarchy has turned green.

We think it is because the hierarchy in the Where clause is in the same dimension as the hierarchy in the Topcount function in the second case - possibly something to do with the auto exists?

Interestingly if you use the browser in the Dev Studio and filter on the [Asset].[Asset Class Hierarchy] in the sepate Filter pane, then doing a top 10 query works fine, but if you put the filter on the page section of the browser, it does not produce the correct results.

|||

Can you "translate" this to an Adventure Works cube? Do you get the same results if you run the two queries in management studio?

Regards

/Thomas

|||This is a known bug that Microsoft is fixing (see http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=549706&SiteID=1). Should get it by the end of August. It is a major fix that will be backported to SP1 (as it required some fixes from the SP2 branch).|||

Many thanks for your post - we were worried that it might have been a 'feature' rather than a bug

Paul

|||We are testing the fix now and the results look promising.