alamb commented on issue #17171:
URL: https://github.com/apache/datafusion/issues/17171#issuecomment-3266105128

   Another possibility is to use a data structure like a Bloom Filter, which I 
think s what spark does. 
   
    https://issues.apache.org/jira/browse/SPARK-32268 has a bit of background
   
   I remember @mbutrovich  was also working on this at some point
   


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