Hibernate InheritanceType.JOINED trouble

I created two classes:

@Entity
@Inheritance( strategy = InheritanceType.JOINED )
public class Parent implements Serializable {

@Id
@GeneratedValue
private Long id;

@Column( unique = true, nullable = false )
private String name;
...
}


@Entity
public class Child extends Parent {

@Column
private String dsc;
...
}

Saving, retrieve, updating of Parent class objects is perfect.
But I can't save Child class objects.
It is interesting to know that after writing Parent class object both
tables are created.
Please, help me in this dummy situation.

.

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