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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/11/05 05:45:41 UTC

[GitHub] [arrow-datafusion] xudong963 commented on issue #1246: group by high cardinality column in datafusion 10 times slower than low cardinality column

xudong963 commented on issue #1246:
URL: https://github.com/apache/arrow-datafusion/issues/1246#issuecomment-961642519


   If I recall correctly, datafusion doesn't do fine optimization about `group by` and `aggregate functions` at present. It's worth adding it to our RoadMap and doing it in the future.


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