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From "Ning Zhang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-1348) Moving inputFileChanged() from ExecMapper to where it is needed
Date Tue, 18 May 2010 17:50:42 GMT
Moving inputFileChanged() from ExecMapper to where it is needed
---------------------------------------------------------------

                 Key: HIVE-1348
                 URL: https://issues.apache.org/jira/browse/HIVE-1348
             Project: Hadoop Hive
          Issue Type: Improvement
            Reporter: Ning Zhang
            Assignee: He Yongqiang


inputFileChanged() is only needed for Bucketed sort merge map join. It should not be put in
ExecMapper.map() where all code paths will hit this function. This function is quite expensive
since JobConf look up is a hash table look up. 

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