Ok, I've been hacking at this for a while now using the median function or using some combination of tail/head to do the same thing and I keep running into this same issue. In these examples, I'm going to use the median function to demonstrate just because the code is easier to look at.So, I run this:WITH MEMBER [Measures].[MedianPID] AS MEDIAN ( NONEMPTY(([Measures].[Process Duration], [Job Completed Date].[Job Completed Calendar Period].members)) )SELECT [Measures].[MedianPID] ON 0 , ([Job Completed Date].[Job Completed Calendar Period].[Month].&[2014]&[5],[Department].[Department].&[7]) on 1FROM [MyCube]I get the correct answer (which is 1039 in this case), but it's slow. Takes around 10 seconds to run. However, if I run this:WITH MEMBER [Measures].[MedianPID] AS MEDIAN ( NONEMPTY(([Measures].[Process Duration], [Job Completed Date].[Job Completed Calendar Period].currentmember)) )SELECT [Measures].[MedianPID] ON 0 , ([Job Completed Date].[Job Completed Calendar Period].[Month].&[2014]&[5],[Department].[Department].&[7]) on 1FROM [MyCube]It comes back in a blink, but the answer is way off (114543265 in this case - which I think is the SUM of all the measure elements). The difference between the two.Slow, correct: [Job Completed Date].[Job Completed Calendar Period].membersfast, incorrect: [Job Completed Date].[Job Completed Calendar Period].currentmemberWhat I don't understand is that logically, I would think that currentmember is what I want in that set. I only want the process duration measures that are in the month of May, which is declared in the row axis ([Job Completed Date].[Job Completed Calendar Period].[Month].&[2014]&[5]). But that doesn't seem to be the case.What in blazes is happening here? Also, have a look at this blog post: http://erikasblog.datainspirations.com/2010/01/22/calculating-non-numerical-medians-in-mdx/That dude is doing exactly what I think I need to do, but I can't seem to translate that into what I need. Ultimately, I need better a performing median calculation in my cube and the median function syntax that gives me the correct answer is far too slow when I start adding more filters or hierarchies. Any help would be appreciated.Thanks in advance.
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