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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/05/19 10:59:55 UTC

[GitHub] [arrow-datafusion] alamb commented on issue #2573: Improve UX for `UNION` vs `UNION ALL`

alamb commented on issue #2573:
URL: https://github.com/apache/arrow-datafusion/issues/2573#issuecomment-1131546072

   Given the usecase is trying to map Union plans to what Spark does, using an explicit `Distinct` in the logical plan (that is converted into a `GroupBy` when doing physical planning makes sense to me 👍 
   
   Doing the UNION --> GroupBy transformation during SQL planning was probably a shortcut.


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