EclipseLink JPA：无法在报表查询

Question

EclipseLink：无法在报表查询中设置提取组。

    TypedQuery<Q> query = em.createQuery(criteriaQuery);
    query.setHint("javax.persistence.fetchgraph", entityGraph); 
    List results = query.getResultList();

什么是报告查询？

https://docs.oracle.com/cd/B25221_04/web.1013/b13593/errcode006.htm

6112: FETCH_GROUP_NOT_SUPPORT_ON_REPORT_QUERY
Cause: Fetch group cannot be set on report query.
Action: Remove the fetch group setting on ReportQuery, or use ReadObjectQuery or ReadObjectQuery instead.

感谢。