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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2022/12/01 10:13:48 UTC

[GitHub] [spark] zhengruifeng commented on pull request #38799: [SPARK-37099][SQL] Introduce the group limit of Window for rank-based filter to optimize top-k computation

zhengruifeng commented on PR #38799:
URL: https://github.com/apache/spark/pull/38799#issuecomment-1333530415

   I just image a special case: if the child's (e.g a SMJ) output ordering happens to satisfy the requirement of this filter, then there will be no extra SortExec, is it always beneficial to apply this optimization?


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