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Date: Mon, 18 Oct 2010 17:26:30 -0400 (EDT)
From: "Siying Dong (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Subject: [jira] Updated: (HIVE-1638) convert commonly used udfs to generic
 udfs
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     [ https://issues.apache.org/jira/browse/HIVE-1638?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Siying Dong updated HIVE-1638:
------------------------------

    Attachment: HIVE-1638.4.patch

One file is missing in HIVE-1638.3.patch

> convert commonly used udfs to generic udfs
> ------------------------------------------
>
>                 Key: HIVE-1638
>                 URL: https://issues.apache.org/jira/browse/HIVE-1638
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Siying Dong
>         Attachments: HIVE-1638.1.patch, HIVE-1638.2.patch, HIVE-1638.3.patch, HIVE-1638.4.patch
>
>
> 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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