Ashutosh Chauhan created HIVE-3950:
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             Summary: Remove code for merging files via MR job
                 Key: HIVE-3950
                 URL: https://issues.apache.org/jira/browse/HIVE-3950
             Project: Hive
          Issue Type: Improvement
          Components: Query Processor
            Reporter: Ashutosh Chauhan


Hive can merge files either via MR job or via map only job. Obviously, doing it 
via map-only job is more efficient, but there is an option of doing it via MR 
job as well because CombineFileInputFormat is available only in hadoop-0.20 and 
later. Since, we no longer support hadoop versions earlier than 20 anymore all 
that is now dead code, we should get rid of it.

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