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https://issues.apache.org/jira/browse/HIVE-2471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phabricator updated HIVE-2471:
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Attachment: HIVE-2471.D2367.2.patch
kevinwilfong updated the revision "HIVE-2471 [jira] Add timestamp column with
index to the partition stats table.".
Reviewers: JIRA, njain
Changed the name of the stats table so that this update will apply
automatically and immediately, otherwise the update command will fail on old
schemas. Also introduced versioning to the name while I think is better than
the old method of coming up with a new combination of (PARTITION, PART) and
(STATISTICS, STATS).
REVISION DETAIL
https://reviews.facebook.net/D2367
AFFECTED FILES
ql/src/java/org/apache/hadoop/hive/ql/stats/jdbc/JDBCStatsSetupConstants.java
ql/src/java/org/apache/hadoop/hive/ql/stats/jdbc/JDBCStatsUtils.java
> Add timestamp column to the partition stats table.
> --------------------------------------------------
>
> Key: HIVE-2471
> URL: https://issues.apache.org/jira/browse/HIVE-2471
> Project: Hive
> Issue Type: Improvement
> Reporter: Kevin Wilfong
> Assignee: Kevin Wilfong
> Attachments: HIVE-2471.1.patch.txt, HIVE-2471.D2367.1.patch,
> HIVE-2471.D2367.2.patch
>
>
> Occasionally, when entries are added to the partition stats table the program
> is halted before it can delete those entries, by an exception, keyboard
> interrupt, etc. These build up to the point where the table gets very large,
> and it hurts the performance of the update statement which is often called.
> In order to fix this, I am adding a column to the table which is
> auto-populated with the current timestamp. This will allow us to create
> scripts that go through periodically and clean out old entries from the table.
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