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https://issues.apache.org/jira/browse/HIVE-1743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12930671#action_12930671
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Namit Jain commented on HIVE-1743:
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+1
running tests
> 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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