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From "Daniel John Debrunner (JIRA)" <derby-...@db.apache.org>
Subject [jira] Resolved: (DERBY-997) ClassCastException when executing queries with aggregates in app servers
Date Thu, 02 Mar 2006 20:10:44 GMT
     [ http://issues.apache.org/jira/browse/DERBY-997?page=all ]
Daniel John Debrunner resolved DERBY-997:

    Fix Version:
     Resolution: Fixed

Fixed and confirm with test case

> ClassCastException when executing queries with aggregates in app servers
> ------------------------------------------------------------------------
>          Key: DERBY-997
>          URL: http://issues.apache.org/jira/browse/DERBY-997
>      Project: Derby
>         Type: Bug
>   Components: SQL
>     Reporter: Daniel John Debrunner
>     Assignee: Daniel John Debrunner
>      Fix For:,

> Classes that implement the aggregates such as MAX/MIN are loaded as user-defined classes
due to old support for user-defined aggregates.
> If the class loader setup running Derby is not well set up these classes are loaded in
a different class loader space to Derby's class leading to non-comparable classes due to the
the same class (dependend or subper-class, not sure which) being loaded twice.
> While this may be a user setup bug, it has occured frequently leading to wasted time
resolving the issue, it would be better if Derby ensured its classes were loaded consistently.

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