From: David <de4@kent.ac.uk>
To: Joe Conway <mail@joeconway.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-sql@postgresql.org
Subject: Re: arrays and polygons
Date: Fri, 13 Feb 2004 17:00:10 -0000
Message-ID: <005b01c3f252$d6d59ef0$5b660c81@ad.kent.ac.uk> (raw)
References: <001e01c3f21b$a8c0eb00$2d650c81@ad.kent.ac.uk>
<2252.1076684559@sss.pgh.pa.us>
<402CFC66.5060707@joeconway.com>
Thanks to you both that helped enormously,
Dave
----- Original Message -----
From: "Joe Conway" <mail@joeconway.com>
To: "Tom Lane" <tgl@sss.pgh.pa.us>
Cc: "David" <de4@kent.ac.uk>; <pgsql-sql@postgresql.org>
Sent: Friday, February 13, 2004 4:33 PM
Subject: Re: [SQL] arrays and polygons
> Tom Lane wrote:
> > "David" <de4@kent.ac.uk> writes:
> >>INSERT INTO species (location) VALUES ('{((432,89), (45,87), (89,87)),
> >>((54,78), (34,98))};
> >
> > I think you'd need to double-quote each polygon within the array
> > literal.
> >
> > '{"((432,89), (45,87), (89,87))", "..."}'
> >
> > The array parser doesn't think parens are special, so it's not going to
> > magically distinguish array commas from polygon commas for you.
> >
> > BTW, if you are using 7.4, the ARRAY[] constructor syntax might be
> > easier to use.
>
> FWIW, here's what it would look like in 7.4.x:
>
> regression=# select ARRAY['((432,89), (45,87), (89,87))'::polygon,
> '((432,89), (45,87), (89,87))'];
> array
> -------------------------------------------------------------
> {"((432,89),(45,87),(89,87))","((432,89),(45,87),(89,87))"}
> (1 row)
>
> You need to explicitly cast at least the first polygon in order to get
> an array of polygons (versus an array of text).
>
> HTH,
>
> Joe
>
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To: pgsql-sql@postgresql.org
Cc: de4@kent.ac.uk, mail@joeconway.com, tgl@sss.pgh.pa.us
Subject: Re: arrays and polygons
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