Maryann Xue created PHOENIX-944:
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             Summary: Support derived tables in FROM clause that needs extra 
steps of client-side aggregation or other processing
                 Key: PHOENIX-944
                 URL: https://issues.apache.org/jira/browse/PHOENIX-944
             Project: Phoenix
          Issue Type: Task
    Affects Versions: 3.0.0, 4.0.0, 5.0.0
            Reporter: Maryann Xue
            Assignee: Maryann Xue
             Fix For: 3.0.0, 4.0.0, 5.0.0


Groupby in both outer and inner queries cannot be flattened. We can apply an 
extra step of client-side aggregation to handle such cases.
See DerivedTableIT.java for all those examples that are currently not supported.



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