Message Title

When doing an entity join on an entity type that involves multiple tables, currently the joins for the subclasses are missing in the SQL leading to a syntax error when e.g. using a sub- or super-type property with joined inheritance strategy.

@Entity(name = "Item")
@Inheritance(strategy = InheritanceType.JOINED)
public static class Item {
	@Id
	@GeneratedValue
	private Long id;

	@ManyToOne(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
	private Price price;

}

@Entity(name = "Price")
public static class Price{
	@Id
	long id;

	int amount;

	String currency;
}

@Entity(name = "Book")
@Table(name="BOOK")
public static class Book extends Item {
	private String title;

	@ManyToOne(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
	private Author author;
}

@Entity(name = "Car")
@Table(name="CAR")
public static class Car extends Item {
	@OneToMany
	private List<Person> owners;

	String color;
}

SELECT i1 FROM Book i1 JOIN Book i2 ON i1.price = i2.price

The column for the property price is rendered in the ON clause into SQL, but the table join for the super type table item is missing.