class Person {
	@Id
	@Column(name="id")
	private int id;

	@Column(name="name")
	private String name;

	@OneToMany(cascade = {CascadeType.PERSIST}, fetch = FetchType.LAZY)
	@JoinColumn(name="person_id", referencedColumnName = "id")
	private Set<Phone> phones = new HashSet<Phone>();
}

class Phone {
	@Id
	@Column(name="id")
	private int id;

	@Column(name="number")
	private String number;
}

em.createQuery("SELECT p FROM Person p").getResultList()

em.createQuery("SELECT p.phones FROM Person p WHERE p.phones IS NOT EMPTY").getResultList()

em.createQuery("SELECT p.phones FROM Person p").getResultList()