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Sun Java System Application Server Platform Edition 9.0 Update 1 Release Notes
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Chapter 3 Known Issues and Limitations
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Java Persistence API
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Unable to map null database values to primitives.
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Sun Java System Application Server Platform Edition 9.0 Update 1 Release Notes
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: You cannot list MappedSuperclass explicitly using class element in persistence.xml. (Glassfish ID 558)
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Solution
Use Java wrapper types for mapping to nullable database columns.
Previous
: You cannot list MappedSuperclass explicitly using class element in persistence.xml. (Glassfish ID 558)
Next
: Upgrade
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