Problema con una query con Hibernate

[ddr.house]

Ciao a tutti ho eseguito una named queries su DB Oracle attraverso questo codice:

StatelessSession session = AssignSessionFactory.getInstance().openStatelessSession();

List allRecord = session.getNamedQuery("policiesAssingmentQuery").list(); 

dove la named queries in questione è:

<sql-query name="policiesAssingmentQuery"> 
<return-scalar column="POL_NO" type="java.lang.Integer" />
<return-scalar column="LIFE_ASS" type="java.lang.String" />
<return-scalar column="PROPOSER" type="java.lang.String"/>
<return-scalar column="ASSIGNOR" type="java.lang.String"/>
<return-scalar column="ASSIGNEE" type="java.lang.String"/>
 <![CDATA[ 

SELECT

SASASSIGNS.POLICIES.POL_NO,
SASASSIGNS.POLICIES.LIFE_ASS,
SASASSIGNS.POLICIES.PROPOSER, 
SASASSIGNS.ASSIGNS.ASSIGNOR,
SASASSIGNS.ASSIGNS.ASSIGNEE 

    FROM SASASSIGNS.POLICIES
            LEFT JOIN SASASSIGNS.ASSIGNS 
       ON
          SASASSIGNS.POLICIES.POL_NO = SASASSIGNS.ASSIGNS.POL_NO

    ORDER BY SASASSIGNS.POLICIES.POL_NO 

Mi restituisce l'errore

class java.lang.ClassCastException: org.hibernate.impl.SQLQueryImpl cannot be cast to java.util.List

sulla riga:
List allRecord = session.getNamedQuery("policiesAssingmentQuery").l ist();

La query è corretta dove sta quindi il problema????

attendo le vostre risposte...

grazie