alamb commented on PR #3912:
URL: 
https://github.com/apache/arrow-datafusion/pull/3912#issuecomment-1306183236

   > I know there are still some reservations on the context side, but I am out 
of ideas on how to make it simpler while preserving the same set of features 
(allowing dynamic column boundary updates from sub-expressions; being able to 
fork it at certain points (like ORs) and still able to delegate all this 
information back to the call side [so not only to sub-expressions but also the 
expression itself who is calling us]). I'd be happy to try any suggestions 
though.
   
   I feel like we are somewhat stuck because the usecase (at least to me) of 
intermediate column analysis isn't 100% clear. To truly understand I think I 
need some example code showing how this would be used. Until then I can't seem 
to quite follow the proposals (maybe because I am too stuck in previous 
patterns I have seen)
   
   Here is what I propose:
   
   1. We get some sort of specific usecase for the intermediate column range 
expressions
   2. If we can't get that maybe we abandon the multi-column flexibility 
initially and work on getting something in with focus on specific columns and 
see where multi column would have helped


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