простой класс
public class Users {
private Long id;
public void setId(Long id){this.id = id;}
public Long getId(){return id;}
}


файл users.hbm.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping
PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="test.Users"
table="Users">

<id name="id"
type="long"

column="userID">
<generator class="identity"/>
</id>
</class>
</hibernate-mapping>



в куске когда

String query = "select userID from Users";

List list = mySession.createQuery(query).list();

if (list.size()==0 )
{

}


Ошибка
-No data type for node: org.hibernate.hql.ast.tree.IdentNode
\-[IDENT] IdentNode: 'userID' {originalText=userID}


что делать?