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From "Siying Dong (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-1743) Group-by to determine equals of Keys in reverse order
Date Tue, 09 Nov 2010 01:16:08 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1743?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Siying Dong updated HIVE-1743:
------------------------------

    Attachment: HIVE-1743.1.patch

Use revers order to compare list of keys. Also a couple of minor bugs in GenericUDF OP codes.

> Group-by to determine equals of Keys in reverse order
> -----------------------------------------------------
>
>                 Key: HIVE-1743
>                 URL: https://issues.apache.org/jira/browse/HIVE-1743
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Siying Dong
>            Assignee: Siying Dong
>            Priority: Minor
>         Attachments: HIVE-1743.1.patch
>
>
> When processing group-by, in reduce side, keys are ordered. Comparing equality of two
keys can be more efficient in reverse order.

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