ahshahid commented on pull request #30185:
URL: https://github.com/apache/spark/pull/30185#issuecomment-723398475


   @srowen Hi. This PR is now stabilized.  I have also done away with the need 
of creating EqualNullSafe constraints for the aliases as with the new logic 
they are not needed.  I will add a couple of tests more which show that these 
changes produce a more optimized plan using filter push down of constraints 
like literal "false" in  outer join conditions as compared to the current code.


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