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: [EMAIL PROTECTED], http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83
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