c# - LINQ to Nhibernate 重复连接

Question

我有这样的问题

var orderedQueryable = this.participationRequests
           .Fetch(x => x.CommunityEvent)
           .Fetch(x => x.CommunityMember)
                .ThenFetch(x => x.User)
           .Where(x => x.CommunityMember.Community.Id == communityId)
           .OrderBy(x => x.CreateDate);

由于 this bug，where 子句需要在 fetch 之后. 问题是 thouse Fetch 调用会发出额外的连接。在 SQL 查询中如下所示:

select *
from   ParticipationRequests participat0_
       left outer join CommunityEvents communitye1_
         on participat0_.CommunityEventId = communitye1_.Id
       left outer join CommunityMembers communitym2_
         on participat0_.CommunityMemberId = communitym2_.Id
       left outer join Users user3_
         on communitym2_.UserId = user3_.Id
       inner join CommunityMembers communitym4_
         on participat0_.CommunityMemberId = communitym4_.Id
       inner join CommunityMembers communitym5_
         on participat0_.CommunityMemberId = communitym5_.Id
       inner join Communities community6_
         on communitym5_.CommunityId = community6_.Id
where  community6_.Id = 2002 /* @p0 */
order  by participat0_.CreateDate asc

它执行内部联接以在 CommunityId 上放置条件，并执行左外部联接以执行提取。

我找到了 similar question ，但我的查询有不同的执行计划，有和没有额外的连接。

这是 LINQ 提供程序中的错误吗？也许有解决方法？

Answer 1

Added issue在休眠 jira 上