Question

我使用NHibernate执行HQL：

from Contact a where IsInternal = 0

这给了我sallowing sql（来自NHProfiler）：

select TOP ( 25 /* @p0 */ ) contact0_.Id                   as Id29_,
                   contact0_.ObjectVersion        as ObjectVe2_29_,
                   ...
                   ...
from   Contact contact0_
       left outer join Company contact0_1_
         on contact0_.Id = contact0_1_.Id
       left outer join Person contact0_2_
         on contact0_.Id = contact0_2_.Id
       left outer join Branch contact0_3_
         on contact0_.Id = contact0_3_.Id
       left outer join ContactGroup contact0_4_
         on contact0_.Id = contact0_4_.Id
where  contact0_.IsInternal = 0

我现在想用

扩展where-condition

   ... and (contact0_1.Id is not null or contact0_2_.Id is not null)

现在的问题是，我如何访问HQL中的联接表？

最诚挚的问候，托马斯

Answer 1

呃，如果该字段为null，则引用的对象为null。所以：

where IsInternal = 0 and (a.person is not null or a.company is not null)

在where where condition中使用join的列

1 个答案: