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https://issues.apache.org/jira/browse/HIVE-1622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12907367#action_12907367
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Namit Jain commented on HIVE-1622:
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+1
looks good
> Use CombineHiveInputFormat for the merge job if hive.merge.mapredfiles=true
> ---------------------------------------------------------------------------
>
> Key: HIVE-1622
> URL: https://issues.apache.org/jira/browse/HIVE-1622
> Project: Hadoop Hive
> Issue Type: Improvement
> Reporter: Ning Zhang
> Assignee: Ning Zhang
> Attachments: HIVE-1622.patch
>
>
> Currently map-only merge (using CombineHiveInputFormat) is only enabled for
> merging files generated by mappers. It should be used for files generated at
> readers as well.
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