[GitHub] [spark] andygrove edited a comment on pull request #33140: [SPARK-35881][SQL] Add support for columnar execution of final query stage in AdaptiveSparkPlanExec

[GitBox <gi...@apache.org>]

andygrove edited a comment on pull request #33140:
URL: https://github.com/apache/spark/pull/33140#issuecomment-872683064


   > why does the final plan matter? are you going to change `df.collect` to leverage columnar execution as well?
   
   We have no plans to change `df.collect`. The main issue is that `AdaptiveSparkPlanExec` isn't always the final plan. It can be contained inside other plans. One example is when writing the results of an adaptive plan to Parquet and we want to avoid unnecessary columnar-to-row followed by row-to-columnar when doing the columnar write.
   
   


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