Abstract Superclass DELETE not mapped error

[Markus Schmider]

Hello,

using hibernate-jpa-2.1-api 1.0.0.Final, hibernate-entitymanager 4.0.1.Final
I want to use an abstract superclass

@MappedSuperclass
@NamedQueries({
	@NamedQuery(name="Gesamtendscheidung.DeleteAll", query="DELETE FROM Gesamtentscheidung g"),
	@NamedQuery(name="Gesamtendscheidung.FindAll", query="SELECT g From Gesamtentscheidung g")
})
@Inheritance(strategy=InheritanceType.JOINED)
public abstract class Gesamtentscheidung implements Serializable

When I run the named queries I get

ERROR: HHH000177: Error in named query: Gesamtendscheidung.DeleteAll
org.hibernate.hql.internal.ast.QuerySyntaxException: Gesamtentscheidung is not mapped [DELETE FROM Gesamtentscheidung g]

ERROR: HHH000177: Error in named query: Gesamtendscheidung.FindAll
org.hibernate.hql.internal.ast.QuerySyntaxException: Gesamtentscheidung is not mapped [SELECT g From Gesamtentscheidung g]

How can I find all instances or delete all instances in this kind of class hierachy?

Thanks

Hans

[Markus Schmider]

OK answer is
replace @MappedSuperclass with @Entity
MappedSuperclasses cannot be used in queries.

Question: Is there any advantage to use @MappedSuperclass instead of @Entity