parthchandra commented on PR #4891:
URL: 
https://github.com/apache/datafusion-comet/pull/4891#issuecomment-4940747083

   > I was thinking about another approach for this. I haven't explored how 
practical it is to implement though.
   > 
   > The extended explain plan just shows operators, but what if we include 
expressions and use a symbol to annotate whether the expression is rust or jvm?
   > 
   > For example, here `*` could mean Rust and `+` could mean JVM.
   > 
   > ```
   > CometProject: expr1*, expr2* expr3+, expr4+
   >   CometFilter: expr*
   > ```
   
   The way to do it, I think, would be to have a new tag for the expression 
nodes and then the explain plan generator can format it however we want it to 
be displayed. 


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