Inherited IdClass properties ignored in Hibernate

Issue

• Defined an id class hierarchy for use with an entity with a composite id

  public class KeyWithName ... {
      private String name;
      ...
  }
  
  public class KeyWithNameAndId extends KeyWithName ... {
      private Long id;
      ...
  }
  
  @Entity
  @IdClass(KeyWithNameAndId.class)
  public class MyEntity {
      @Id
      private String name;
      @Id
      private Long id;
      ...
  }
  

• The properties of the superclass (e.g. KeyWithName) are ignored
  • They are omitted from DDL when Hibernate creates the table
  • They are not included when the entity is persisted to the database
  • They are not included in the WHERE clause of finds