slim bouguerra created HIVE-18732:
-------------------------------------

             Summary: Push order/limit to Druid historical when approximate 
results are allowed 
                 Key: HIVE-18732
                 URL: https://issues.apache.org/jira/browse/HIVE-18732
             Project: Hive
          Issue Type: Improvement
            Reporter: slim bouguerra


Druid 0.11 allow force push down of Order by Limit to historicals using a 
context Query Flag \{code} forcePushDownLimit\{code}. 
[http://druid.io/docs/latest/querying/groupbyquery.html]

As per the docs 
[http://druid.io/docs/latest/querying/groupbyquery.html|http://druid.io/docs/latest/querying/groupbyquery.html.],
 this is a great optimization that can be used if the approximate results are 
allowed. 



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