Kids speak: Can you write a SQL query and execute that in your RDBM's tools that loads something recursively?
HappyNomad wrote: > Really sorry, but I'm still drawing a blank. If you provide some > sample code then it would be easier for me to understand your > suggestion. > > > On Aug 3, 4:41 pm, Fabio Maulo <[email protected]> wrote: > >> Ok but... Can you write an SQL to eagerly load recursive relation ? >> 2009/8/3 HappyNomad <[email protected]> >> >> >> >> >> >> >>> Hi Fabio, thanks for the reply. But I'm not sure I understand the >>> nature of your question. In any case, the query would need to be in >>> HQL, and not SQL, since I need to load the actual objects, and not >>> just scalar values. >>> >>> On Aug 3, 4:32 pm, Fabio Maulo <[email protected]> wrote: >>> >>>> Can you write a SQL to eagerly load recursive relation ? >>>> >>>> 2009/8/3 HappyNomad <[email protected]> >>>> >>>>> I have a recursive one-to-many relationship that has the default lazy >>>>> value of true. How can I execute a query which recursively retrieves >>>>> the ENTIRE tree? >>>>> >>>>> Here's the recursive one-to-many relationship: >>>>> >>>>> <class name="Category" lazy="false"> >>>>> ... >>>>> <list name="SubCategories" fetch="subselect"> >>>>> <key column="ParentCategoryID"/> >>>>> <index column="PositionInList"/> >>>>> <one-to-many class="Category"/> >>>>> </list> >>>>> >>>>> I don't specify lazy="false" on the list since laziness is required in >>>>> about half the queries I need to run. I have fetch="subselect" on the >>>>> list as an optimization for when I do manage to retrieve the entire >>>>> tree. >>>>> >>>>> I've tried the ICriteria API: >>>>> session.CreateCriteria<Category>().SetFetchMode( "SubCategories", >>>>> FetchMode.Eager ).Add( Restrictions.IsNull >>>>> ("ParentCategory") ).SetResultTransformer >>>>> ( CriteriaSpecification.DistinctRootEntity ).List<Category>(); >>>>> >>>>> but that only eagerly loaded only the first level in the hierarchy. >>>>> >>>> -- >>>> Fabio Maulo >>>> >> -- >> 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] For more options, visit this group at http://groups.google.com/group/nhusers?hl=en -~----------~----~----~----~------~----~------~--~---
