From: Christian Saldarini <cristian@gemini.como.polimi.it>
To: PSQL <pgsql-interfaces@postgreSQL.org>
Subject: need information about storing methods
Date: Tue, 10 Nov 1998 14:40:01 +0100
Message-ID: <36484231.3690A878@gemini.como.polimi.it> (raw)
Hi,
I'm nowadays tryng to use postgresql to store geographical data to use
them with a gis program (GRASS).
The coordinates of each point are stored in a field that is a
point-type.
Anyone can tell me if postgress uses, for this kind of data, a storing
method like HHCODE, poin-quad-trees (or anything better) , or it stores
point-data like anything else?
A query like this one:
" SELECT coordinates FROM table WHERE coordinates @ '((1,1),1)'::circle
"
is executed like anything else, processing evry tuple in the table ?
If so, anyone knows how to implement a more complex storing method?
Thanks to all,
Christian Saldarini
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Subject: Re: need information about storing methods
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