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https://issues.apache.org/jira/browse/HIVE-5483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ashutosh Chauhan updated HIVE-5483:
-----------------------------------
Attachment: HIVE-5483.2.patch
Rewrote most of the patch. Addressed comments. Added more checks and tests.
> use metastore statistics to optimize max/min/etc. queries
> ---------------------------------------------------------
>
> Key: HIVE-5483
> URL: https://issues.apache.org/jira/browse/HIVE-5483
> Project: Hive
> Issue Type: Improvement
> Reporter: Sergey Shelukhin
> Assignee: Ashutosh Chauhan
> Attachments: HIVE-5483.2.patch, HIVE-5483.patch
>
>
> We have discussed this a little bit.
> Hive can answer queries such as select max(c1) from t purely from metastore
> using partition statistics, provided that we know the statistics are up to
> date.
> All data changes (e.g. adding new partitions) currently go thru metastore so
> we can track up-to-date-ness. If they are not up-to-date, the queries will
> have to read data (at least for outdated partitions) until someone runs
> analyze table. We can also analyze new partitions after add, if that is
> configured/specified in the command.
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