isidentical commented on issue #4222:
URL: 
https://github.com/apache/arrow-datafusion/issues/4222#issuecomment-1320542364

   Exactly! The only major distinction I see is that, these seems to be 
constraints only for stuff that can be inferred at the logical planning time 
(so no stats, only schema + the existing query) which in turn might restrict 
some use cases but also might be much more reliable source. I am still in the 
middle on how we can unify these though 🤔 


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