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https://issues.apache.org/jira/browse/HIVE-1213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879145#action_12879145
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Namit Jain commented on HIVE-1213:
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The patch does not apply cleanly
> sort-merge join does not work for sub-queries
> ---------------------------------------------
>
> Key: HIVE-1213
> URL: https://issues.apache.org/jira/browse/HIVE-1213
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: He Yongqiang
> Attachments: Hive-1213.1.patch, Hive-1213.4.patch, Hive-1213.5.patch,
> Hive-1213.6.patch, Hive-1213.7.patch, Hive-1213.8.patch, Hive-1213.9.patch
>
>
> A query like:
> select count(1) from (select /*+ MAPJOIN(x) */ from x join y ON ... ) subq;
> does not work - since there is no mapping between the join operator and the
> corresponding source
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