Re: [PR] #17801 Improve nullability reporting of case expressions [datafusion]

["pepijnve (via GitHub)" <gi...@apache.org>]

pepijnve commented on PR #17813:
URL: https://github.com/apache/datafusion/pull/17813#issuecomment-3356588582

   I experimented a bit with the rewrite + const eval approach on the physical expression side of things. While attractive and simple to implement, the downside is that it's going to be very hard to ensure the logical and physical side agree. Logical needs to work without `ExecutionProps` so it has less information available to it compared to the `PhysicalExpr` tree. I don't see a way to resolve that. As a consequence I ended up with an limited ad hoc version of const evaluation on the logical side and would have to do the same for physical which isn't really ideal from a DRY perspective.


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