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https://issues.apache.org/jira/browse/HIVE-18513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16341418#comment-16341418
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Xuefu Zhang commented on HIVE-18513:
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[~jdere] Thanks for working on this useful feature! The patch seems big, and
for such a feature, a high-level doc might be helpful to those who are
interested in knowing more it w/o reading the code changes. For example,
besides the question of determining if two queries are the same asked above,
I'd also like to know if the cache is distributed (shared by multiple HS2s).
One might also ask about the eviction policy, etc. A high-level doc would be
greatly helpful to meet the curiosity. Thanks.
> 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
> Attachments: HIVE-18513.1.patch, HIVE-18513.2.patch,
> HIVE-18513.3.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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