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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-4396) Create a efficient method to create a deep copy of a mapredwork
Date Mon, 22 Apr 2013 06:25:15 GMT
Namit Jain created HIVE-4396:
--------------------------------

             Summary: Create a efficient method to create a deep copy of a mapredwork 
                 Key: HIVE-4396
                 URL: https://issues.apache.org/jira/browse/HIVE-4396
             Project: Hive
          Issue Type: Improvement
          Components: Query Processor
            Reporter: Namit Jain


In many optimization steps, we create a copy of the query plan and then change some parts
of it.
Currently, the only reliable way to do so is to serialize and deserialize it, which is fairly
expensive.
It would be very useful to have a cheaper method to do the same.

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