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https://issues.apache.org/jira/browse/HIVE-964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12801018#action_12801018
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Namit Jain commented on HIVE-964:
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Can you file follow up patches - I will try to merge this
> handle skewed keys for a join in a separate job
> -----------------------------------------------
>
> Key: HIVE-964
> URL: https://issues.apache.org/jira/browse/HIVE-964
> Project: Hadoop Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: He Yongqiang
> Attachments: hive-964-2009-12-17.txt, hive-964-2009-12-28-2.patch,
> hive-964-2009-12-29-4.patch, hive-964-2010-01-08.patch,
> hive-964-2010-01-13-2.patch, hive-964-2010-01-14-3.patch,
> hive-964-2010-01-15-4.patch
>
>
> The skewed keys can be written to a temporary table or file, and a followup
> conditional task can be used to perform the join on those keys.
> As a first step, JDBM can be used for those keys
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