About @Id


Is there any faster select method?

SELECT: TypedQuery<Point> query = em.createQuery("SELECT p FROM Point p WHERE p.id = " + element.getId(), Point.class); List<Point> points = query.getResultList();   WRITE: em.persist(p);   ** the Point class is of the tutorial.   I found the above select method is ten times slower than the write method, in my very simple benchmark. I guess the reason there is no SQL in the write method.   #1 2011-02-19 04:40 SELECT: TypedQuery<Point> query = em. createQuery ( "SELECT p FROM Point p WHERE ...



Unpin the parameter instances from the second-level cache.(Method of javax.jdo.datastore.DataStoreCache)


Bug when posting threads with Firefox 34.0.5

#1 2014-12-10 11:03 I can't see the textarea when creating forum threads or tickets with Firefox 34.0.5? ...



(Optional) Name of table that stores the generated id values.(Annotation Element of javax.persistence.TableGenerator)


EntityManager.merge gives EntityNotFoundException

Just started using objectdb (2.3.4). Calling EntityManager.merge for a new (non-managed) object gives EntityNotFoundException. I am perplexed by this. See attached test case. Thanks for your assistance. Full error output is: Exception in thread "main" [ObjectDB 2.3.4] javax.persistence.EntityNotFoundException Entity is not found: classdb.Test#'id' (error 631) at com.objectdb.jpa.EMImpl.merge(EMImpl.java:456) at classdb.Test.main(Test.java:32) #1 2011-11-29 12:06 Just started using objectdb (2.3.4). Calling EntityManager.merge for a new (non-managed) object gives EntityNotFo ...



Groups PrimaryKeyJoinColumn annotations.(Annotation of JPA)


not possible to add an existing object to an array via explorer

when trying to add an existing object via context menu/add existing object an entering the id the attached message appears Bug Version: 1.04 Priority: Normal Status: Fixed Replies: 1 Type:  Bug ...



Return a copy of the JDO identity associated with this instance.(Method of javax.jdo.spi.PersistenceCapable)


copyKeyFieldsToObjectId(pcClass, fm, oid)

Copy fields from an outside source to the key fields in the ObjectId.(Method of javax.jdo.spi.JDOImplHelper)


jdoCopyKeyFieldsFromObjectId(fm, oid)

Copy fields to an outside consumer from the key fields in the ObjectId.(Method of javax.jdo.spi.PersistenceCapable)