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Date: Wed, 6 Jun 2012 17:56:22 +0000 (UTC)
From: "Sambavi Muthukrishnan (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Message-ID: <1612608604.44338.1339005383140.JavaMail.jiratomcat@issues-vm>
Subject: [jira] [Created] (HIVE-3096) Support for dynamic table links
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Sambavi Muthukrishnan created HIVE-3096:
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             Summary: Support for dynamic table links
                 Key: HIVE-3096
                 URL: https://issues.apache.org/jira/browse/HIVE-3096
             Project: Hive
          Issue Type: Improvement
          Components: Query Processor
    Affects Versions: 0.10.0
            Reporter: Sambavi Muthukrishnan
            Assignee: Sambavi Muthukrishnan


HIVE-2989 introduces the concept of table links. In this improvement, the plan is to complete the support for dynamic table links. 
Dynamic links are a type of link where
a) if the source of the table link adds a partition, that partition is automatically added to all tables that link to it
b) if the source of the table link drops a partition, that partition is automatically dropped from all the tables that link to it
c) if the source of the table link has a metadata change via:
ALTER TABLE table CHANGE COLUMN column ...
ALTER TABLE table ADD/REPLACE COLUMN column ...
ALTER TABLE table_name [PARTITION partitionSpec] SET LOCATION "new location"
the links pointing to that table will also have their metadata correspondingly changed.


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