adriangb commented on issue #16511:
URL: https://github.com/apache/datafusion/issues/16511#issuecomment-3001322864

   > Make it a new physical optimizer rule? Or add them to the current physical 
filter push down
   
   Do we need a phyiscal optimizer rule? My thought is that these optimizations 
can happen at the logical layer. At the phyiscal layer we do need some 
expression optimization, but primarily to deal with type casting to match the 
file schema, etc (i.e. https://github.com/apache/datafusion/pull/16530), 
expressions at this point should be already simplified from the logical layer 
and that doesn't really change except maybe in some edge cases which I'm not 
sure are worth dealing with.
   
   
   > Some filters, such as partition columns related predicates, will be fully 
pushed down scan, that is, we don't have such predicates in some FilterExec. 
How to capture this?
   
   Not sure I understood this part


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