linq-to-nhibernate

I have table with 10 000 elements. IQuerable<IEntity> query = dataRep.Get<IEntity>() .Query(); I need to get the index(rownum) of selected obj without getting all table items var obj = query.Where( x => x.Name == "testName") .FirstOrDefault(); The simple sql work fine : select name, id, r from ( select name, id, rownum r from collections order by id ) where name = 'testName'; How do this in Linq to NHibernate ? Edit: I tried add to IEntity class property RowNumber and mapping this on hbm as <property name="RowNumber" formula="rownum" /> But after var index = query.Where( x => x.Name ==

If i do Session.Linq<MyClass>().Where(x => x.Id = someId).FirstOrDefault(); where MyClass has a set of eager loaded child object on it, the FirstOrDefault() seems to prevent this from working by adding a TOP 1 to the SQL. Is this just a bug (feature?) in Linq2NH (which i understand is being rewritten) or am I missing something? Is there a preferred alternative which works properly? Thanks Looks like a bug, in my opinion FirstOrDefault is a pretty well defined Linq operator and it has nothing to do with eager/lazy loading, so it should not break it. I guess there are lots of such nuances, which

Having a situation similar to the following example: 1 parent entity Employee having 2 child collections: Addresses and Phones I need to retrieve in a single roundtrip all employees with their Addresses and Phones initialized and also cache the query that achieves that in level 2 cache using Cacheable() . Using: var baseQuery = session .Query<Employee>() .Cacheable(); baseQuery .FetchMany(e => e.Addresses) .ToFuture(); var list = baseQuery .FetchMany(e => e.Phones) .ToFuture() .ToList(); should work, but I get the following exception: NHibernate.PropertyAccessException Message: Exception

I have a query that I can run in LinqPad, but not in NHibernate LINQ. I found a similar bug on NHibernate Jira NHibernate NH-2865 , but I think this perhaps a different bug and I'm looking for possible alternatives. The query that works in LinqPad using default LINQ to SQL is like this: from ticket in LotteryTickets group tiket by ticket.ticketType into g select new { TicketType = g.Key, TotalWinningTickets = g.Count(b => b.WinAmount != 0), TotalWon = g.Sum(b => b.WinAmount * b.ticketWeight), TotalTickets = g.Count(), } There are various other ways to count the TotalWinningTickets such as

As far as I know group by has only been added in NHibernate 3.0, but even when using version 3, I can't get group by to work. I have tried to do the following query: Session.Query().GroupBy(gbftr => gbftr.Tag).OrderByDescending(obftr => obftr.Count()).Take(count).ToList(); But I receive the following error: Antlr.Runtime.NoViableAltException'. [. OrderByDescending (. GroupBy (NHibernate.Linq.NhQueryable `1 [Forum.Core.ForumTagRelation] Quote ((gbftr,) => (gbftr.Tag)),), Quote ((obftr,) => (. Count (obftr,))),)] Does anyone have an idea if I might be mistaken, and group by isn't implemented in