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From "Venky Iyer (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-348) Provide type information to custom mappers and reducers.
Date Fri, 13 Mar 2009 23:38:50 GMT
Provide type information to custom mappers and reducers.
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                 Key: HIVE-348
                 URL: https://issues.apache.org/jira/browse/HIVE-348
             Project: Hadoop Hive
          Issue Type: Improvement
            Reporter: Venky Iyer


Either by setting an environment variable with the schema, or (ideally), configurably passing
JSON data to custom mappers/reducers. This would be more data to pump into the pipe on each
mapper/reducer, but it would be generated on the mapper/reducer, and it may mean much less
processing for the custom script (using a fast json library compared to casting each column
that needs casting based on the schema). 

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