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  1. Derby
  2. DERBY-997

ClassCastException when executing queries with aggregates in app servers

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 10.1.3.1, 10.2.1.6
    • Component/s: SQL
    • Labels:
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      Description

      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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            • Assignee:
              djd Daniel John Debrunner
              Reporter:
              djd Daniel John Debrunner
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                Updated:
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