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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2021/03/23 02:45:16 UTC

[GitHub] [spark] viirya commented on pull request #31937: [SPARK-10816][SS] Support session window natively

viirya commented on pull request #31937:
URL: https://github.com/apache/spark/pull/31937#issuecomment-804541032


   > This PR leverages two different approaches on merging session windows:
   >    1. merging session windows with Spark's aggregation logic (a variant of sort aggregation)
   >    2. updating session window for all rows bound to the same session, and applying aggregation logic afterwards
   
   Is the second one the approach we took in #31570?
    
   
   


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