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Posted to derby-dev@db.apache.org by "Andrew McIntyre (JIRA)" <de...@db.apache.org> on 2006/04/24 22:56:07 UTC
[jira] Reopened: (DERBY-997) ClassCastException when executing
queries with aggregates in app servers
[ http://issues.apache.org/jira/browse/DERBY-997?page=all ]
Andrew McIntyre reopened DERBY-997:
-----------------------------------
> 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: 10.2.0.0, 10.1.2.3, 10.1.3.0
>
> 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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