Maryann Xue created PHOENIX-3309:

             Summary: Divide query planning into multiple stages
                 Key: PHOENIX-3309
             Project: Phoenix
          Issue Type: Task
            Reporter: Maryann Xue
            Assignee: Maryann Xue

Right now we do query planning all in one step, converting a Calcite logical 
Rel tree into a Phoenix physical Rel tree.
We'll have to divide this process into two or more stages. The basic two-stage 
model will be logical planning and physical planning, where general 
optimization rules and the conversion from Calcite logical algebra to Phoenix 
logical operators will take place in the logical planning stage, and Phoenix 
physical-operator-specific rules will be assigned to the physical planning 

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