jackwener commented on issue #4628:
URL: 
https://github.com/apache/arrow-datafusion/issues/4628#issuecomment-1352500600

   If we can remove `Arc<LogicalPlan>` and use `LogicalPlan`, wen can use 
pattern-match to match subtree pattern like:
   
   match projection-filter
   
   LogicalPlan::Projection(Projection{LogicalPlan::Filter, ..})


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