I read Ayende's blog for effectively selecting a tree. (
http://ayende.com/Blog/archive/2009/08/28/nhibernate-tips-amp-tricks-efficiently-selecting-a-tree.aspx
)

It seems ok but I have a problem.I have hierarchical role tables and
hierarchical RoleApplicationss tables. For the query, "select r from Role r
left join fetch r.ChildRoles left join fetch r.RoleApplications"

,it gets all the role hierarchy and related applications. But I also want to
get roleapplication hierarchy. Are there any effective ways to do that?

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