--- In ib-support@yahoogroups.com, "Marco Menardi" <mmenaz@l...>
wrote:

> Perfectly right! I's something like that. I was afraid of telling

this

> because if you give specific problem, people very often tells you

"you

> have to change the design", and not help to solve *that* specific
> problem. Suggestions about design are very usefull too, but they
> should come *in addition* to solution of specific problems, if
> available. Or they should in any case consider if that could be a
> general problem in another situation. Of course, when I help someone
> in newsgroups, I often do the same mistake ;))

:)) Personally I prefer adopt model to tool, not vice versa, so have
not much experiense with hierarhical structures in relational server,
but many my colleagues have. We have rather large section of articles
on this subject on www.ibase.ru, but unfortunately for you, mainly in
Russian. I selected among them articles in English, rather old, but
perhaps you did'nt see part of them and they can help you:

http://www.ibase.ru/devinfo/DBMSTrees/9603d06.html
http://www.ibase.ru/devinfo/DBMSTrees/9604d06.html
http://www.ibase.ru/devinfo/DBMSTrees/9605d06.html
http://www.ibase.ru/devinfo/DBMSTrees/sqltrees.html
http://www.ibase.ru/devinfo/tree.txt

Best regards, Alexander.