alamb commented on issue #2059:
URL: 
https://github.com/apache/arrow-datafusion/issues/2059#issuecomment-1075709389


   > @alamb could you please provide some context on why we are using Expr 
instead of PhyscialExpr for ParquetExec in the first place?
   
   I don't know of any original rationale -- I think @yordan-pavlov 's initial 
implementation was in terms of `Expr`
   
   
   I think it would be fine to use physical exprs instead (as we can always 
translate from Expr --> PhysicalExpr)


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