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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/09/16 18:22:54 UTC

[GitHub] [arrow-datafusion] alamb commented on issue #3516: Support Top-K query optimization for `ORDER BY [ASC|DESC] LIMIT n`

alamb commented on issue #3516:
URL: https://github.com/apache/arrow-datafusion/issues/3516#issuecomment-1249672493

   The TopK operator can also be parallelized the same way as a multi-stage grouping
   
   Like run `TopK` on each of the input DataFusion partitions, Union them all together, and then do a TopK on the final plan


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