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Posted to github@arrow.apache.org by "mingmwang (via GitHub)" <gi...@apache.org> on 2023/02/22 03:28:08 UTC

[GitHub] [arrow-datafusion] mingmwang commented on issue #5360: Support rewrite multiple COUNT(DISTINCT expr)

mingmwang commented on issue #5360:
URL: https://github.com/apache/arrow-datafusion/issues/5360#issuecomment-1439388342

   I'm going to leverage the `group by grouping set` to rewrite this.  Looks like Presto/Trino also take this approach. 
   SparkSQL and Calcite have implement this optimizations but they use different approach. 


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