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https://issues.apache.org/jira/browse/HIVE-964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12798583#action_12798583
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Namit Jain commented on HIVE-964:
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Instead of making Driver aware of conditional task - can we change the code
structure ?
Pass a context to execute()/initialize() if needed.
The current tasks would ignore the context. But the conditional task would add
the resulting tasks in the queue which will be
passed in the context.
> 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
>
>
> 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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