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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/04/07 09:07:48 UTC

[GitHub] [arrow-datafusion] yjshen commented on pull request #1990: Make it possible to only scan part of a parquet file in a partition

yjshen commented on PR #1990:
URL: https://github.com/apache/arrow-datafusion/pull/1990#issuecomment-1091385001

   Since @tustvold is working on the new task scheduler in DataFusion, I keep this PR containing only physical plan changes. Leave planner or API unchanged.
   
   The current changes are still helpful for downstream projects like Ballista or our Blaze, where query planning is done separately, no matter what we take later in DataFusion core. In Blaze, we use the Spark way of deciding InputSplits based on total dataset size and assigning parts of a big parquet file to multiple tasks.
   
   @alamb @tustvold @liukun4515, please let me know what you think about this.


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