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From "Kristian Waagan (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-4849) Re-compilation may cause duplicate entries in the XPLAIN table
Date Thu, 14 Oct 2010 07:47:36 GMT
Re-compilation may cause duplicate entries in the XPLAIN table
--------------------------------------------------------------

                 Key: DERBY-4849
                 URL: https://issues.apache.org/jira/browse/DERBY-4849
             Project: Derby
          Issue Type: Bug
          Components: SQL
    Affects Versions: 10.6.2.1, 10.7.0.0
            Reporter: Kristian Waagan
            Priority: Minor


If happening at the right moment, a re-compilation request may cause duplicate entries in
the XPLAIN statement tables.
I have only confirmed this for the SYSXPLAIN_STATEMENTS table, and I do not know if the other
XPLAIN tables are affected.

The error is highly intermittent, and so far I have only been able to trigger it when testing
the automatic index statistics update prototype.
See the attached stack-trace for some more details.

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