JPA Managed Entity: Is a searched Entity still a Managed Entity

Question

If an entity, which I have with Query.getSingleResult found even a Managed Entity. Can I make changes to it and it must not entityManager.merge or persist () call.

EntityManager em = ...
TypedQuery<User> query = em.createQuery("SELECT u FROM User u WHERE u.email = :userEmail");
query.setParameter("userEmail", "user@test.de");
User user = query.getSingleResult();
// change the user name and email
user.setName("Test1");
user.setEmail("test1@test.de");
// that all???

Answer 1

您已经通过EntityManager提取了它，还没有分离它，因此，是的，它仍然是一个受管实体，您对其所做的任何更改都将被写入数据库。