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	Optimistic locking: prevent version increment on entity collection attribute ; em.getTransaction().begin(); Document doc = new Document ... "); EntityManager em = emf.createEntityManager(); em.getTransaction().begin ... = emf.createEntityManager(); em.getTransaction().begin(); Document doc = new Document
	Internal exception when updating date filed (TemporalType.DATE) ; entityManager.getTransaction().begin ... ; entityManager.getTransaction().begin(); ... .getTransaction().begin(); for (int index = 0; index < 10000; index
	Date field Index is corrupted due to time change ().begin(); ... ; em.getTransaction().begin(); Long r = (Long) q ... ; em.getTransaction().begin();
	Schema Update: class hierarchy change ; em.getTransaction().begin(); MyEntity entity = new MyEntity(); entity.id = "123 ... ; em.getTransaction().commit(); em.getTransaction().begin(); MyEntity ... a new object! // // Persist an entity // em.getTransaction().begin(); //
	Updating Entities - All have been verified to be passed Main.paygradeDB.getTransaction().begin(); this.rate ... .getResultList().forEach(p -> System.out.println(p.getRate())); Main.paygradeDB.getTransaction().begin ... ="pre-java"> Main.employeeDB.getTransaction().begin(); for(Employee e : Query
	Persist error @ManyToMany how to define correct entities relationships (){ if(!em.getTransaction().isActive()) em.getTransaction().begin(); } } }begin(); } } }begin(); } } } lo Hoel If you use merge, you many want to change
	Remove a modified entity cause an optimistic lock exception ; em.getTransaction().begin(); ... .getTransaction().begin(); MyEntity e = em.find(MyEntity.class, 1 ... ; em.getTransaction().begin(); em.persist(new
	Items in list are doubled, when the entity class is not enhanced c from Customer c").getResultList(); em.getTransaction().begin(); for(Object o ... .createQuery("select i from Item i").getResultList(); em.getTransaction().begin ... (); em.getTransaction().begin(); Customer c = new Customer(); em.persist(c
	@OneToMany(fetch = FetchType.LAZY) list is always null ) { try { transaction.begin(); entityManager.persist(o ... { transaction.begin(); entityManager.persist(child); if (child.getParent ... ) { try { transaction.begin(); entityManager.persist(o
	Remove of an entry from a @OneToMany collection is not possible if the enhancer is disabled ; ParentEntity parentEntity = new ParentEntity(); entityManager.getTransaction().begin(); ... ; entityManager.getTransaction().begin(); ChildEntity childEntity = new ChildEntity(); ... ; em.getTransaction().begin(); MyEntity e = new