Mostafa Mokhtar created HIVE-10123:
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             Summary: Hybrid grace Hash join : Use estimate key count from 
stats to initialize BytesBytesMultiHashMap
                 Key: HIVE-10123
                 URL: https://issues.apache.org/jira/browse/HIVE-10123
             Project: Hive
          Issue Type: Bug
          Components: Hive
    Affects Versions: 1.2.0
            Reporter: Mostafa Mokhtar
            Assignee: Mostafa Mokhtar
             Fix For: 1.2.0


Hybrid grace Hash join is not using estimated number of rows from the 
statistics to initialize BytesBytesMultiHashMap. 

Add some logging to BytesBytesMultiHashMap to track get probes and use msec for 
expandAndRehash as us overflow.



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