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https://issues.apache.org/jira/browse/HIVE-3950?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ashutosh Chauhan updated HIVE-3950:
-----------------------------------
Attachment: hive-3950.patch
Attaching patch. Phabricator link: https://reviews.facebook.net/D8211
> Remove code for merging files via MR job
> ----------------------------------------
>
> Key: HIVE-3950
> URL: https://issues.apache.org/jira/browse/HIVE-3950
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Ashutosh Chauhan
> Attachments: hive-3950.patch
>
>
> Hive can merge files either via MR job or via map only job. Obviously, doing
> it via map-only job is more efficient, but there is an option of doing it via
> MR job as well because CombineFileInputFormat is available only in
> hadoop-0.20 and later. Since, we no longer support hadoop versions earlier
> than 20 anymore all that is now dead code, we should get rid of it.
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