Hibernate: Don't query inheriting subclass with Criteria

Question

Say I have a class with a subclass:

@Entity
@Table(name = "TABLE_A")
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
public class ClassA {
    // columns

    @Entity
    @Table(name = "TABLE_B")
    public static class ClassB extends ClassA {
        // extra columns
    }
}

When I want to query TABLE_A I try session.createCriteria(ClassA.class) , but it ends up giving me results from both TABLE_A and TABLE_B. How can I make it only get results from TABLE_A (ie the parent class only)?

Answer 1

使用type函数：

select a from ClassA a where type(a) not in (ClassB)