[ http://issues.apache.org/jira/browse/DERBY-997?page=all ]
Daniel John Debrunner reassigned DERBY-997:
-------------------------------------------
Assign To: Daniel John Debrunner
> 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
>
> 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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