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From "Prasad Mujumdar (JIRA)" <>
Subject [jira] [Created] (HIVE-3764) Support metastore version consistency check
Date Mon, 03 Dec 2012 08:57:58 GMT
Prasad Mujumdar created HIVE-3764:

             Summary: Support metastore version consistency check
                 Key: HIVE-3764
             Project: Hive
          Issue Type: Improvement
          Components: Metastore
            Reporter: Prasad Mujumdar
            Assignee: Prasad Mujumdar

Today there's no version/compatibility information stored in hive metastore. Also the datanucleus
configuration property to automatically create missing tables is enabled by default. If you
happen to start an older or newer hive or don't run the correct upgrade scripts during migration,
the metastore would end up corrupted. The autoCreate schema is not always sufficient to upgrade
metastore when migrating to newer release. It's not supported with all databases. Besides
the migration often involves altering existing table, changing or moving data etc.

Hence it's very useful to have some consistency check to make sure that hive is using correct
metastore and for production systems the schema is not automatically by running hive.

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