title: org.hibernate.Session.save() triggering DB insert
body: <p>I've got the problem that my entity is inserted into the db without any "flush" being called,
  Maybe someone has an idea under which circumstances a session.save immediately triggers db insert?</p>
  
  <p>I think the only to interesting parts of my object which I would like to save (but not persist(!)) is </p>
  
  <pre><code>  @javax.persistence.Id
    @javax.persistence.GeneratedValue(strategy = GenerationType.IDENTITY)
    @javax.persistence.Column(name = "EM_id")
    private Long     id;
  
    @javax.persistence.Version
    @javax.persistence.Column(name = "version")
    private int      version;
  </code></pre>