You are forgetting some other NH feature. 2009/10/28 Igor <igor.korol...@gmail.com>
> > On 21 окт, 18:05, Fabio Maulo <fabioma...@gmail.com> wrote: > > I'm not so sure that such kind of query has a better performance than 2 > or 3 > > round-trips. > > I suppose, there will be more than "just 2 or 3 round-trips", as > p.ADDRESSES is collection, and fetching collection and object tree > (pretty deep in this case) for each item of this collection is not so > cheap. Of course if we really have just 2-3 items in this collection, > it will be not so bad... 1 query for collection items, and (2-3)*3 > queries for associated objects (in worst case where all objects will > be different). But for other cases there are more reasons to avoid > "1+n query problem"... > For some cases it may be even better to prefetch small amounts of > "reference data" with dummy queries - say > "from Country" - to get all countries in 1 query and then > initialization of any state.Country (but just in the same session, if > there is no second-level cache) won't require db trip at all. > > > -- Fabio Maulo --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to nhusers@googlegroups.com To unsubscribe from this group, send email to nhusers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/nhusers?hl=en -~----------~----~----~----~------~----~------~--~---
