Hibernate 如何使用 InheritanceType.JOINED 区分对象类型

我的 Spring 应用程序中有不同的用户类型。我实现了某种继承。所有用户类型都从 User 类扩展而来。我认为这里有两张表就足够了：

1. 表“用户” - 包含所有共享实体属性的列
2. 表“users_corporate” - 包含 CorporateCustomer 类属性的列：companyName 和 VatNumber

“用户”将有：id、用户名、密码、名字、姓氏、电子邮件、手机、城市、街道、邮政编码

“users_corporate”将有：company_name, vat_number

类 RetailCustomer 和 Provider 没有任何带有 @Column 注释的字段，因此不需要为它们设置表，我只需要使用 OneToMany 映射声明字段..现在我想知道 hibernate 如何将 Provider 和 RetailCustomer 与每个字段区分开来其他，如果我在他们的班级中没有 @Table 注释。当我将使用 Spring Data 存储库并例如调用 providerRepository.findAll() 时，它现在如何将“用户”表中的哪些行是提供者，哪些是零售客户？它会起作用吗？我错过了什么吗？

基础实体：

@MappedSuperclass
public class BaseEntity{

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
}

用户：

@Entity
@Table(name="users")
@Inheritance(strategy = InheritanceType.JOINED)
public class User extends BaseEntity{

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

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

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

    @ManyToMany(fetch = FetchType.EAGER)
    @JoinTable(name = "users_roles", joinColumns = @JoinColumn(name = "user_id"), inverseJoinColumns = @JoinColumn(name = "role_id"))
    private Collection<Role> roles;

}

企业客户：

@Entity
@Table(name="users_corporate")
public class CorporateCustomer extends User{

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

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

    @OneToMany(mappedBy = "customer")
    private List<Appointment> appointments;
}

零售客户：

@Entity
//@Table  <---- i think it is not needed here?
public class RetailCustomer extends User {

    @OneToMany(mappedBy = "customer")
    private List<Appointment> appointments;
}

供应商：

@Entity
//@Table  <---- i think it is not needed here?
public class Provider extends User{

    @OneToMany(mappedBy = "provider")
    private List<Appointment> appointments;

    @ManyToMany
    @JoinTable(name="works_providers", joinColumns=@JoinColumn(name="id_user"), inverseJoinColumns=@JoinColumn(name="id_work"))
    private List<Work> works;

    @OneToOne(mappedBy="provider", cascade = {CascadeType.ALL})
    private WorkingPlan workingPlan;
}