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https://issues.apache.org/jira/browse/HIVE-1965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13010508#comment-13010508
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Liyin Tang commented on HIVE-1965:
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+1
> Auto convert mapjoin should not throw exception if the top operator is union
> operator.
> --------------------------------------------------------------------------------------
>
> Key: HIVE-1965
> URL: https://issues.apache.org/jira/browse/HIVE-1965
> Project: Hive
> Issue Type: Bug
> Reporter: He Yongqiang
> Assignee: Liyin Tang
> Attachments: HIVE-1965.1.patch
>
>
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