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JDO Doc
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postDelete(event)

) Invoked whenever a persistent instance is deleted, for example during javax.jdo.PersistenceManager.deletePersistent. This method is called after the instance transitions to persistent-deleted. Access to field values is not permitted. Parameters: event - the delete event. Since: JDO 2.0
Forum
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Attempt to open a non existing file '/tmp/objectdb_xxxx/SortQueryItr_6.mrg'

- maybe one application deleted the tmp file of another application. I hope this description is sufficient. EKK ObjectDB deletes its temporary files in 2 ways: Every process deletes its own temporary files that become unreachable (tracked by using weak references). When a process starts it tries to delete
JDO Doc
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deletePersistentAll(parameters)

Method javax.jdo.Query long deletePersistentAll(   Map parameters ) Deletes all the instances of the candidate class that pass the filter. Parameters: parameters - for the query Returns: the number of instances of the candidate class that were deleted Since: JDO 2.0 See Also: deletePersistentAll()
JDO Doc
1

deletePersistentAll(parameters)

Method javax.jdo.Query long deletePersistentAll(   Object... parameters ) Deletes all the instances of the candidate class that pass the filter. Parameters: parameters - for the query Returns: the number of instances of the candidate class that were deleted Since: JDO 2.0 See Also: deletePersistentAll()
JDO Doc
1

Element.deleteAction

Annotation Element javax.jdo.annotations.Element ForeignKeyAction deleteAction Delete action to apply to any foreign key for the element. Returns: delete action to apply to any foreign key for the element Default value: javax.jdo.annotations.ForeignKeyAction.UNSPECIFIED Since: JDO 2.1
JPA Doc
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executeUpdate()

Method javax.persistence.Query int executeUpdate() Execute an update or delete statement. Returns: the number of entities updated or deleted Throws: IllegalStateException - if called for a Java Persistence query language SELECT statement or for a criteria query TransactionRequiredException
JDO Doc
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ForeignKey.deleteAction

Annotation Element javax.jdo.annotations.ForeignKey ForeignKeyAction deleteAction The delete action of this foreign key. Returns: the delete action of this foreign key Default value: javax.jdo.annotations.ForeignKeyAction.RESTRICT Since: JDO 2.1
JDO Doc
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javax.jdo.ObjectState

ObjectState PERSISTENT_CLEAN Since: JDO 1.0 ObjectState PERSISTENT_DELETED Since: JDO 1.0 ObjectState ... _DELETED Since: JDO 1.0 ObjectState PERSISTENT_NONTRANSACTIONAL_DIRTY Since: JDO 1.0 ObjectState
JPA Doc
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javax.persistence.EntityManager

., for update or delete. Create an instance of Query for executing a native SQL statement, e.g., for update or delete. Parameters: sqlString - a native SQL query string Returns: the new query instance
JPA Doc
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javax.persistence.LockModeType

. Another transaction T2 then modifies or deletes that row, before T1 has committed. Both transactions eventually ... reads a row. Another transaction T2 then modifies or deletes that row, before T1 has committed or rolled