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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/05/23 11:07:57 UTC

[GitHub] [arrow-datafusion] alamb commented on issue #2581: Introduce ProjectionMask To Allow Nested Projection Pushdown

alamb commented on issue #2581:
URL: https://github.com/apache/arrow-datafusion/issues/2581#issuecomment-1134533242

   I like the idea of a single Projection structure that understand how to select nested types.
   
   > We could theoretically lift this into arrow-rs
   
   As long as we can maintain independence for parquet (aka one can select subsets of parquet files without having to use Arrow) that is great.
   
   If we don't get the Projection into arrow-rs in time, we could also copy/paste the Projection code into DataFusion and provide a conversion back and forth during the interim period


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