Patricia as well as other digital trees could be realized using GiST
once we'll have time and support to extend current GiST interface.
For the moment you can use SP-GiST which should have patricia implementation.
http://www.cs.purdue.edu/spgist/.
Oleg
On Sat, 25 Aug 2007, Alex Povolotsky wrote:
> Hello!
>
> I'm working on a project requiring fast query like 'does ADDRESS belongs to
> SET OF NETWORKS?'. Naturally, such a query is better implemented using
> PATRICIA, but building PATRICIA tree is a relatively long task and is better
> to be done once, for instance, at server startup.
>
> I'm thinking of implementing such a tree using stored procedures, and looking
> for advise from postgresql-hackers: how can I hook startup of server?
>
> Idea of having something like a blob to store and restore PATRICIA tree may
> be better suited to standard SQL, but I'm looking for more elegant solution.
> Or am I totally wrong?
>
> Alex.
>
>
>
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>
Regards, Oleg
_____________________________________________________________
Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
Sternberg Astronomical Institute, Moscow University, Russia
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83
