.java

/**
 * 단일 테이블 전략
 *     create table Item (
 *        DTYPE varchar(31) not null,
 *         id bigint not null,
 *         brand varchar(255),
 *         price integer not null,
 *         hasHipassYn varchar(255),
 *         isElectronicYn varchar(255),
 *         cargoWeight integer,
 *         source varchar(255),
 *         destination varchar(255),
 *         primary key (id)
 *     )
 */
@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn // 단일 테이블 전략의 경우 해당 어노테이션 없어도 생성됨
@Getter
@Setter
public class Vehicle {
  
  @Id
  @GeneratedValue
  private Long id;
  
  private String brand;
  
  private int price;
}

@Entity
@Getter
@Setter
public class Car extends Vehicle {
  
  private String hasHipassYn;
  
  private String isElectronicYn;
}

@Entity
@Getter
@Setter
public class Truck extends Vehicle {
   
  private int cargoWeight;
  
  private String source;
  
  private String destination;
}