alamb commented on issue #3898:
URL: 
https://github.com/apache/arrow-datafusion/issues/3898#issuecomment-1286034135

   One benefit of keeping it inside `PhysicalExpr` is that then anyone who has 
an extension for `PhysicalExpr` can also provide their own expression analysis
   
   As long as they have reasonable default implementations (that return unknown 
ExprBounds) I think it would be fine


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