I have several Entities which have a reference to the same instance of another Entity-Object like so:

    @Data
    @Entity
    @OnDelete(action = OnDeleteAction.CASCADE)
    class A {
      @Id
      private Long id;
    }
    
    @Data
    @Entity
    @Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
    abstract class B {
      @Id
      private Long id;

      @OnDelete(action = OnDeleteAction.CASCADE)    
      @ManyToOne(fetch = FetchType.EAGER, optional = false, cascade = CascadeType.REMOVE)  
      private A a;
    }
    
    @Data
    @Entity
    class C extends B {

    }

    @Data
    @Entity
    class D extends B {

    }

My problem is I just want to delete cascade the instance `A`. The number of Entities referencing A is not known upfront (hence the class is abstract). The DDL generated of the concrete classes `C` and `D` does not contain the `OnDelete` action anymore, so I had to work around using `@JoinColumn` together with `@ForeignKey` lke so: @JoinColumn(foreignKey = @ForeignKey(foreignKeyDefinition="FOREIGN KEY (trance_id) REFERENCES m_trace(id) ON DELETE CASCADE"))