I have 2 entities that persist into a DB.

@Entity
// bid is a foreign key to B (id)
public class A
{
    @Id
    @GeneratedValue (strategy = GenerationType.IDENTITY)
    @Getter
    @Setter
    private Long id;

    @NotNull
    @Column (unique = false)
    @Getter
    @Setter
    private String name;

    @Column (unique = false)
    @Getter
    @Setter
    private Long bid;  // foreign key to B (id)

    @OneToOne
    @JoinColumn (name = "bid", referencedColumnName = "id", insertable = false, updatable = false)
    @Getter
    private B b;
}



@Entity
public class B
{
    @Id
    @GeneratedValue (strategy = GenerationType.IDENTITY)
    @Getter
    @Setter
    private Long id;

    @NotNull
    @Column (unique = false)
    @Getter
    @Setter
    private String info;
}

This is working well.

public interface ARepo extends JpaRepository <A, Long>
{   
    public List <A> findByName (String name);
}

findByName delivers A-objects where member getB returns object of B.

But I do not want the whole B, I only want B.info.

Can I change the @JoinColumn to get only that single element instead of the whole row?