criteriaQuery和multiselect

Question

你好我尝试使用multiselect。我有这个代码。

CriteriaBuilder criteriaBuilder = getEntityManager().getCriteriaBuilder();
        CriteriaQuery<SessionPersonne> criteriaQuery  = criteriaBuilder.createQuery(SessionPersonne.class);
        Root<SessionPersonne> sessionPersonneRoot = criteriaQuery.from(SessionPersonne.class);
criteriaQuery.multiselect(sessionPersonneRoot.get("keySessionPersonne"), sessionPersonneRoot.get("origine"));

        Query query = getEntityManager().createQuery(criteriaQuery);

        List<Object[]> result = query.getResultList();
        for(int i = 0;i <result.size(); i++){
            Object[] resultat = result.get(i);
            System.out.println(resultat[0]+" "+resultat[1]);
        }

但我有此错误消息：

-Exception [EclipseLink-6051] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.QueryException
Exception Description: Partial object queries are not allowed to maintain the cache or be edited.  You must use dontMaintainCache().
Query: ReadAllQuery(referenceClass=SessionPersonne )

感谢您的帮助。