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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2021/03/01 14:18:27 UTC

[GitHub] [spark] cloud-fan commented on pull request #31356: [SPARK-34257][SQL] Improve performance for last_value over unbounded window frame

cloud-fan commented on pull request #31356:
URL: https://github.com/apache/spark/pull/31356#issuecomment-787983122


   It's a bit of waste to optimize for a single case `last_value`. Do we have other functions and get the n-th file from the end?


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