eejbyfeldt commented on PR #16161:
URL: https://github.com/apache/datafusion/pull/16161#issuecomment-2981365745

   I did not look closely at yet since I have not really contributed here in 
months. 
   
   > there are three projections. for bitwise operation, there's no benifit for 
extra projection.
   
   
   This extra projection is introduced by `CommonSubexprEliminate`. I 
understand that the changes make it so that they do not interact in the 
presented query, but is this really a general fix of that behavior?
   
   
   
   But the goal of leaving more structure in logical plan after resolving the 
grouping expr so that optimization and unparsing sounds reasonable to me.


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