btw... I don't know where you are generating the query... in general I don't have such problems because I'm using HQL most of the times.
On Thu, Jun 24, 2010 at 12:24 PM, Diego Mijelshon <[email protected]>wrote: > session.Query<T> is new in 3.x, using the integrated Linq provider, which > is HQL-based instead of Criteria-based behind the scenes, allowing for more > flexibility. > > Diego > > > > On Thu, Jun 24, 2010 at 12:13, ben <[email protected]> wrote: > >> Fabio, >> >> Is session.Query<T> new? >> >> Using what you have with session.Linq<T>: >> >> var query = from v in _session.Linq<Vehicle>() >> where v.Carrier == >> _session.Load<Carrier>(carrierId) >> select v; >> >> Generates the same sql as what I have in the my original Linq example: >> >> NHibernate: SELECT this_.Id as Id1_1_, this_.VehicleType as >> VehicleT2_1_1_, this_.BusinessRef as Business3_1_1_, this_.CarrierId >> as CarrierId1_1_, carrier1_.Id as Id2_0_, carrier1_.Name as Name2_0_, >> carrier1_.BusinessRef as Business3_2_0_, carrier1_.Enabled as >> Enabled2_0_ FROM Vehicles this_ left outer join Carriers carrier1_ on >> this_.CarrierId=carrier1_.Id WHERE this_.CarrierId = @p0;@p0 = 1 >> >> Thanks >> Ben >> >> On Jun 23, 12:38 pm, Fabio Maulo <[email protected]> wrote: >> > from v in session.Query<Vehicle>() where v.Carrier == >> > session.Load<Carrier>(1) select v >> > >> > >> > >> > On Wed, Jun 23, 2010 at 8:16 AM, ben <[email protected]> wrote: >> > > I've got a one to many association between a Carrier and Vehicle. In >> > > my database my Vehicle table has a foreign key CarrierId. >> > >> > > The most efficient way to query vehicles by carrier would be: >> > >> > > select ... from Vehicles where Vehicles.CarrierId == 1 >> > >> > > However, if I use QBC: >> > >> > > var fromDb = session.CreateCriteria<Vehicle>() >> > > .CreateCriteria("Carrier", >> > > global::NHibernate.SqlCommand.JoinType.InnerJoin) >> > > .Add(Expression.Eq("Id", 1)) >> > > .AddOrder(new Order("BusinessRef", true)) >> > > .List<Vehicle>(); >> > >> > > The result is: >> > >> > > NHibernate: SELECT this_.Id as Id1_1_, this_.VehicleType as >> > > VehicleT2_1_1_, this_.BusinessRef as Business3_1_1_, this_.CarrierId >> > > as CarrierId1_1_, carrier1_.Id as Id2_0_, carrier1_.Name as Name2_0_, >> > > carrier1_.BusinessRef as Business3_2_0_ FROM Vehicles this_ inner join >> > > Carriers carrier1_ on this_.CarrierId=carrier1_.Id WHERE carrier1_.Id >> > > = @p0 ORDER BY carrier1_.BusinessRef asc;@p0 = 1 >> > >> > > If I use NHibernate.Linq: >> > >> > > var fromDb2 = session.Linq<Vehicle>() >> > > .Where(x => x.Carrier.Id == 1) >> > > .OrderBy(x => x.BusinessRef) >> > > .ToList(); >> > >> > > The result is similar but always seems to do an outer join (how can I >> > > force it to be left inner?): >> > >> > > NHibernate: SELECT this_.Id as Id1_1_, this_.VehicleType as >> > > VehicleT2_1_1_, this_.BusinessRef as Business3_1_1_, this_.CarrierId >> > > as CarrierId1_1_, carrier1_.Id as Id2_0_, carrier1_.Name as Name2_0_, >> > > carrier1_.BusinessRef as Business3_2_0_ FROM Vehicles this_ left outer >> > > join Carriers carrier1_ on this_.CarrierId=carrier1_.Id WHERE >> > > carrier1_.Id = @p0 ORDER BY this_.BusinessRef asc;@p0 = 1 >> > >> > > Finally if I use HQL (as much as I dislike using "magic" strings), the >> > > result is exactly what I would expect and seems the most efficient: >> > >> > > var fromDb3 = session.CreateQuery("from Vehicle where >> > > Carrier.Id = :id") >> > > .SetParameter("id", 1) >> > > .List<Vehicle>(); >> > >> > > NHibernate: select vehicle0_.Id as Id1_, vehicle0_.VehicleType as >> > > VehicleT2_1_, vehicle0_.BusinessRef as Business3_1_, >> > > vehicle0_.CarrierId as CarrierId1_ from Vehicles vehicle0_ where >> > > vehicle0_.carrier...@p0;@p0 = 1 >> > >> > > So why do I get this difference and more importantly, how can I use >> > > QBC or Linq to generate the same SQL as HQL does? >> > >> > > Thanks, >> > > Ben >> > >> > > -- >> > > You received this message because you are subscribed to the Google >> Groups >> > > "nhusers" group. >> > > To post to this group, send email to [email protected]. >> > > To unsubscribe from this group, send email to >> > > [email protected]<nhusers%[email protected]> >> <nhusers%[email protected]<nhusers%[email protected]> >> > >> > > . >> > > For more options, visit this group at >> > >http://groups.google.com/group/nhusers?hl=en. >> > >> > -- >> > Fabio Maulo >> >> -- >> You received this message because you are subscribed to the Google Groups >> "nhusers" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]<nhusers%[email protected]> >> . >> For more options, visit this group at >> http://groups.google.com/group/nhusers?hl=en. >> >> > -- > You received this message because you are subscribed to the Google Groups > "nhusers" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<nhusers%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/nhusers?hl=en. > -- Fabio Maulo -- You received this message because you are subscribed to the Google Groups "nhusers" group. 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