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From "Sushanth Sowmyan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-10562) Add version column to NOTIFICATION_LOG table and DbNotificationListener
Date Thu, 30 Apr 2015 22:24:05 GMT
Sushanth Sowmyan created HIVE-10562:
---------------------------------------

             Summary: Add version column to NOTIFICATION_LOG table and DbNotificationListener
                 Key: HIVE-10562
                 URL: https://issues.apache.org/jira/browse/HIVE-10562
             Project: Hive
          Issue Type: Sub-task
    Affects Versions: 1.2.0
            Reporter: Sushanth Sowmyan


Currently, we have a JSON encoded message being stored in the NOTIFICATION_LOG table.

If we want to be future proof, we need to allow for versioning of this message, since we might
change what gets stored in the message. A prime example of what we'd want to change is as
in HIVE-10393.

MessageFactory already has stubs to allow for versioning of messages, and we could expand
on this further in the future. NotificationListener currently encodes the message version
into the header for the JMS message it sends, which seems to be the right place for a message
version (instead of being contained in the message, for eg.).

So, we should have a similar ability for DbEventListener as well, and the place this makes
the most sense is to and add a version column to the NOTIFICATION_LOG table.



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