xudong963 opened a new issue #2035:
URL: https://github.com/apache/arrow-datafusion/issues/2035


   **Is your feature request related to a problem or challenge? Please describe 
what you are trying to do.**
   During reviewing PRs, I found `Explain row plan` will be useful. (`raw plan` 
means the plan doesn't optimize).
   
   **Describe the solution you'd like**
   A clear and concise description of what you want to happen.
   
   **Describe alternatives you've considered**
   A clear and concise description of any alternative solutions or features 
you've considered.
   
   **Additional context**
   Materialize has the feature: https://materialize.com/docs/sql/explain/
   Here is an example:
   ```
   materialize=> EXPLAIN RAW PLAN FOR select * from posts where content = '1' 
and id = 1;
                 Raw Plan
   -------------------------------------
    %0 =                               +
    | Get materialize.public.posts (u1)+
    | Filter ((#2 = "1") && (#0 = 1))  +
   
   (1 row)
   ```
   


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