optimize orderby followed by a groupby --------------------------------------
Key: HIVE-2340
URL: https://issues.apache.org/jira/browse/HIVE-2340
Project: Hive
Issue Type: Sub-task
Components: Query Processor
Reporter: Navis
Priority: Minor
Before implementing optimizer for JOIN-GBY, try to implement RS-GBY
optimizer(cluster-by following group-by).
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