alamb commented on PR #20749:
URL: https://github.com/apache/datafusion/pull/20749#issuecomment-4026897337

   > > I'm concerned that we start to have multiple optimizers that have to 
coordinate (namely CSE, the expression pushdown for get_field and this) but I 
don't have any suggestions for a better approach and I guess if we have tests 
it will be okay. I can try to review more in detail tomorrow. Do you want to 
take this out of draft?
   > 
   > An approach might be combining optimizers in one pass if possible, I think 
there are some opportunities there.
   
   - See also https://github.com/apache/datafusion/issues/15045


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