Hibernate 4与众不同并一起订购

Question

select distinct groupMember.proUcer.proUserDetail 
from proGroupMembership groupMember 
where groupMember.proGroup.id =:groupId and groupMember.status = 1 
order by groupMember.proUcer.proUserDetail.firstName

ORA-01791例外 当我执行此查询时来。 经过多次研究后，我得到了解决这个问题的解决方案，选择了一个我们正在申请的专栏 - 所以我根据解决方案转换查询

select distinct groupMember.proUcer.proUserDetail, groupMember.proUcer.proUserDetail.firstName 
from proGroupMembership groupMember 
where groupMember.proGroup.id =:groupId and groupMember.status = 1 
order by groupMember.proUcer.proUserDetail.firstName

现在我的问题是我只需要对象列表但是 query.list（）返回对象数组的列表。 请帮我解决这个问题。