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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-1738) Optimize Key Comparison in GroupByOperator
Date Fri, 22 Oct 2010 19:54:17 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12923992#action_12923992
] 

Namit Jain commented on HIVE-1738:
----------------------------------

Siying, can you file a follow-up jira for the above ?

> Optimize Key Comparison in GroupByOperator
> ------------------------------------------
>
>                 Key: HIVE-1738
>                 URL: https://issues.apache.org/jira/browse/HIVE-1738
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Siying Dong
>            Assignee: Siying Dong
>             Fix For: 0.7.0
>
>         Attachments: HIVE.1738.1.patch, HIVE.1738.2.patch, HIVE.1738.3.patch
>
>
> GroupByOperator uses ObjectInspectorUtils.compare() to compare keys, which is written
for generalized object comparisons, which is not optimized for group-by operator. By optimizing
this logic, we expect to see obvious improvements in GroupByOperator.

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