Hibernate与多个JoinColumn的ManyToOne关系不是延迟获取的

Question

我有一个以下示例我想使用多个连接列（下面的类示例）在Car和CarAchievement表之间创建一个懒惰的@ManyToOne关系

@Entity
@Table(name = "CAR")
public class Car implements Serializable {

    @Id
    @GenericGenerator(name = "SEQ_CAR", strategy = "sequence",
        parameters = {
                @org.hibernate.annotations.Parameter(
                        name = "sequence",
                        value = "SEQ_CAR"
                        )
                }
    )
    @GeneratedValue(generator = "SEQ_CAR")
    @Column(name = "ID")
    private Integer id;

    @ManyToOne(fetch = FetchType.LAZY)
    @NotFound(action = NotFoundAction.IGNORE)
    @JoinColumns({
        @JoinColumn(name = "region", referencedColumnName = "region", updatable = false, insertable = false),
        @JoinColumn(name = "model", referencedColumnName = "model", updatable = false, insertable = false),
        @JoinColumn(name = "year", referencedColumnName = "type", updatable = false, insertable = false),
        @JoinColumn(name = "type", referencedColumnName = "year", updatable = false, insertable = false)
    })
    @JsonIgnore
    private CarAchievement carAchievement;
}

这种关系工作正常，但似乎不是一个LazyFetch，CAR的每个查询似乎都会自动获取CarAchievement，即使它未指定获取此关系

Hibernate版本：4.3.10.Final