Yongzhi Chen created HIVE-20915:

             Summary: Make dynamic sort partition optimization available to HoS 
and MR
                 Key: HIVE-20915
                 URL: https://issues.apache.org/jira/browse/HIVE-20915
             Project: Hive
          Issue Type: Bug
          Components: Query Planning
    Affects Versions: 4.0.0
            Reporter: Yongzhi Chen
            Assignee: Yongzhi Chen

HIVE-20703 put dynamic sort partition optimization under cost based decision, 
but it also makes the optimizer only available to tez. 
hive.optimize.sort.dynamic.partition works with other execution engines for a 
long time, we should keep the optimizer available to them. 

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