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https://issues.apache.org/jira/browse/HIVE-18513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16484147#comment-16484147
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Jason Dere commented on HIVE-18513:
-----------------------------------
The cache is disabled for queries involving external tables.
It is disabled by default for non-transactional tables as well, but can be
enabled for those with hive.query.results.cache.nontransactional.tables.enabled.
> Query results caching
> ---------------------
>
> Key: HIVE-18513
> URL: https://issues.apache.org/jira/browse/HIVE-18513
> Project: Hive
> Issue Type: Bug
> Components: Query Planning
> Reporter: Jason Dere
> Assignee: Jason Dere
> Priority: Major
> Fix For: 3.0.0
>
> Attachments: HIVE-18513.1.patch, HIVE-18513.2.patch,
> HIVE-18513.3.patch, HIVE-18513.4.patch, HIVE-18513.5.patch, HIVE-18513.6.patch
>
>
> Add a query results cache that can save the results of an executed Hive query
> for reuse on subsequent queries. This may be useful in cases where the same
> query is issued many times, since Hive can return back the results of a
> cached query rather than having to execute the full query on the cluster.
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