alamb commented on PR #7612:
URL: 
https://github.com/apache/arrow-datafusion/pull/7612#issuecomment-1735340910

   > I don't mind simplifying the code so I'll work on it following your 
earlier suggestions.
   
   Thank you! BTW I found the relevant code to extract equijoins predicates 
here: 
https://docs.rs/datafusion/latest/datafusion/optimizer/extract_equijoin_predicate/struct.ExtractEquijoinPredicate.html
   
   > are you thinking a new set of tests that specifically test for the absence 
of post_join_filter
   
   Yes I guess I was thinking about that. Mostly I was thinking "if we broke / 
reverted the code in this PR accidentally, how would we know something wasn't 
correct"? Without some test coverage the behavior could change and we don't 
know. 
   
   


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