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https://issues.apache.org/jira/browse/HIVE-21279?focusedWorklogId=220632&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-220632
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ASF GitHub Bot logged work on HIVE-21279:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 29/Mar/19 17:47
Start Date: 29/Mar/19 17:47
Worklog Time Spent: 10m
Work Description: vineetgarg02 commented on pull request #582: Hive
21386: Extend the fetch task enhancement done in HIVE-21279 to make it work
with query result cache
URL: https://github.com/apache/hive/pull/582
This patch brings the following changes:
* If result cache is enable for a query (select), results will be written to
result cache dir instead of tmp scratch dir.
* Query result cache will then cache the set of files if it can for the
query, instead of moving and caching the result directory.
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Issue Time Tracking
-------------------
Worklog Id: (was: 220632)
Time Spent: 10m
Remaining Estimate: 0h
> 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
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: HIVE-21279.1.patch, HIVE-21279.10.patch,
> HIVE-21279.11.patch, HIVE-21279.12.patch, HIVE-21279.13.patch,
> HIVE-21279.2.patch, HIVE-21279.3.patch, HIVE-21279.4.patch,
> HIVE-21279.5.patch, HIVE-21279.6.patch, HIVE-21279.7.patch,
> HIVE-21279.8.patch, HIVE-21279.9.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> 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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