Slow DAX Measure, trying to find overlapping Dates

[pcavacas]

I have the below DAX Expressions

Count Of Overlaps = 
var fromDate = MIN('VF Trade Spend'[From])
var toDate = MAX('VF Trade Spend'[To])

return CALCULATE(DISTINCTCOUNT('VF Trade Spend'[Contract Line #]),
    REMOVEFILTERS('VF Trade Spend'[Contract Line #], 'VF Trade Spend'[From], 'VF Trade Spend'[To]),
    FILTER('VF Trade Spend', 
        'VF Trade Spend'[From] >= fromDate 
        && 'VF Trade Spend'[From] <= toDate
        && 'VF Trade Spend'[To] >= fromDate 
        && 'VF Trade Spend'[To] <= toDate
    )
)

This DAX measure is working, but it is really slow (takes 30+ seconds to complete).

The main point of what it is trying to do is we have a table that has a contract # and start and end dates on it.  I'm trying to find a count of any contracts that have overlapping date ranges in them.

[AntrikshSharma · Accepted solution]

That is an optimization problem, I had the same problem and Marco Russo from SQLBI suggested to use this construct:

SUMX( DISTINCT ( 'VF Trade Spend'[Contract Line #] ), 1 )

Please read this article here. SQLBI: Analyzing the performance of DISTINCTCOUNT