nealrichardson opened a new issue, #33760:
URL: https://github.com/apache/arrow/issues/33760

   ### Describe the enhancement requested
   
   https://github.com/apache/arrow/pull/19706/files#r1073391100 pointed out 
that in creating the ScanNode, we're extracting field names from Expressions in 
order to pass them to C++, which then makes FieldRef Expressions again. We can 
probably eliminate that step. Doing so may mean we need to drop a following 
Project step (or not, we'll have to see), and if so that means our 
`show_query()` output would change too--but if the projection doesn't show up 
faithfully in the print method of the ScanNode, we may want to reconsider (or, 
better, improve the ScanNode print).
   
   ### Component(s)
   
   R


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