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https://issues.apache.org/jira/browse/HIVE-21279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16771356#comment-16771356
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Vineet Garg commented on HIVE-21279:
------------------------------------
[~bslim] Thanks for pointing it out. This initial patch was just to get a test
run. I will fix all the check-style violations in upcoming patch(s).
> Avoid moving/rename operation in FileSink op for SELECT queries
> ---------------------------------------------------------------
>
> Key: HIVE-21279
> URL: https://issues.apache.org/jira/browse/HIVE-21279
> Project: Hive
> Issue Type: Improvement
> Components: Query Planning
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Priority: Major
> Fix For: 4.0.0
>
> Attachments: HIVE-21279.1.patch
>
>
> Currently at the end of a job FileSink operator moves/rename temp directory
> to another directory from which FetchTask fetches result. This is done to
> avoid fetching potential partial/invalid files by failed/runway tasks. This
> operation is expensive for cloud storage. It could be avoided if FetchTask is
> passed on set of files to read from instead of whole directory.
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