Using a set in the filter condition - mdx

Question

I am trying the following query on the demo Sales cube of icCube:
WITH
SET [Amer.Countries]
AS Descendants([North America],[Country])
SELECT
Filter([Amer.Countries],([Measures].[Amount], {[2009], [2010]}) > 13240) on Rows,
[Measures].members on Columns
FROM [Sales]
WHERE [Time].[2011]
What is wrong with the condition ([Measures].[Amount], {[2009], [2010]}) > 13240 and how do I fix it?
I get the following error message from icCube:
operator '>' syntax error (left-operand:'set')
(right-operand:'numeric')
The only thing I understand from this message is that the use of the set  {[2009], [2010]} is out of place. However, I do not understand why that is the case and what the fix should be.
 
 
 
 
 
 

Answer 1

([Measures].[Amount], {[2009], [2010]}) > 13240
The left side of 13240 expects a numerical value or at least an expression that can be evaluated to a value. What you wrote is not a tuple and could be thought of as a crossjoin. To calculate the aggregated [Amount] for the year 2009 & 2010 of the current country:
([Measures].[Amount], {[2009], [2010]})
you can use eval function to compute the filtering value:
eval( {[2009], [2010]}, [Measures].[Amount] )
And use it within the SELECT to compute a static set that is ignoring the year [2011] specified in the slicer:
with
static set [Amer.Countries] as
filter( [North America].children ,
eval( {[2009], [2010]}, [Measures].[Amount]) >= 13240
)
select [Measures].members on 0, [Amer.Countries] on 1
from [Sales] where [Time].[2011]
You can have a look to the following introduction of MDX to better understand the notions of tuples, sets, etc...
Hope that helps.