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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-1638) convert commonly used udfs to generic udfs
Date Wed, 15 Sep 2010 17:27:33 GMT
convert commonly used udfs to generic udfs
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                 Key: HIVE-1638
                 URL: https://issues.apache.org/jira/browse/HIVE-1638
             Project: Hadoop Hive
          Issue Type: Improvement
          Components: Query Processor
            Reporter: Namit Jain
            Assignee: Siying Dong


Copying a mail from Joy:


i did a little bit of profiling of a simple hive group by query today. i was surprised to
see that one of the most expensive functions were in converting the equals udf (i had some
simple string filters) to generic udfs. (primitiveobjectinspectorconverter.textconverter)

am i correct in thinking that the fix is to simply port some of the most popular udfs (string
equality/comparison etc.) to generic udsf?


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