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https://issues.apache.org/jira/browse/HIVE-3774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13529808#comment-13529808
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Namit Jain commented on HIVE-3774:
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comments addressed
> Sort merge join should work if join cols are a prefix of sort columns for
> each partition
> ----------------------------------------------------------------------------------------
>
> Key: HIVE-3774
> URL: https://issues.apache.org/jira/browse/HIVE-3774
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: Namit Jain
> Attachments: hive.3774.1.patch, hive.3774.2.patch
>
>
> Currently, a join is converted into a sort-merge join only if the join cols
> exactly matches the sort cols.
> This constraint can definitely be relaxed.
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