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Posted to issues@hive.apache.org by "Naveen Gangam (JIRA)" <ji...@apache.org> on 2017/10/30 15:13:00 UTC
[jira] [Assigned] (HIVE-16663) String Caching For Rows
[ https://issues.apache.org/jira/browse/HIVE-16663?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Naveen Gangam reassigned HIVE-16663:
------------------------------------
Assignee: Naveen Gangam (was: BELUGA BEHR)
> String Caching For Rows
> -----------------------
>
> Key: HIVE-16663
> URL: https://issues.apache.org/jira/browse/HIVE-16663
> Project: Hive
> Issue Type: Improvement
> Components: Beeline
> Affects Versions: 2.0.1
> Reporter: BELUGA BEHR
> Assignee: Naveen Gangam
> Priority: Minor
> Attachments: HIVE-16663.1.patch, HIVE-16663.2.patch, HIVE-16663.3.patch, HIVE-16663.4.patch, HIVE-16663.5.patch, HIVE-16663.6.patch, HIVE-16663.7.patch
>
>
> It is very common that there are many repeated values in the result set of a query, especially when JOINs are present in the query. As it currently stands, beeline does not attempt to cache any of these values and therefore it consumes a lot of memory.
> Adding a string cache may save a lot of memory. There are organizations that use beeline to perform ETL processing of result sets into CSV. This will better support those organizations.
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