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From "Phabricator (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-2471) Add timestamp column to the partition stats table.
Date Fri, 16 Mar 2012 21:09:40 GMT

     [ https://issues.apache.org/jira/browse/HIVE-2471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Phabricator updated HIVE-2471:
------------------------------

    Attachment: HIVE-2471.D2367.3.patch

kevinwilfong updated the revision "HIVE-2471 [jira] Add timestamp column with index to the
partition stats table.".
Reviewers: JIRA, njain

  Added a big comment saying it is up to the Hive administrator to drop old partition stats
tables.

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,
HIVE-2471.D2367.3.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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