gabotechs commented on issue #20396:
URL: https://github.com/apache/datafusion/issues/20396#issuecomment-3915089490

   > A possible alternative would be to keep annotations in a separate context 
structure keyed by plan nodes, which optimizers can consult when needed
   
   This sounds reasonable. I don't have strong opinions about the actual 
implementation, at this stage I'd mainly like to collect information about 
whether this is something people would find useful.
   
   As it would imply extending the already big `ExecutionPlan` trait, I want to 
make sure people would be fine with that.


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