From: Bruce Momjian <pgman@candle.pha.pa.us>
To: Thomas Lockhart <lockhart@fourpalms.org>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Tim Hart <tjhart@mac.com>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: [SQL] line datatype
Date: Tue, 16 Jul 2002 11:38:28 -0400 (EDT)
Message-ID: <200207161538.g6GFcS925954@candle.pha.pa.us> (raw)
In-Reply-To: <3D343BEA.1B51B9CD@fourpalms.org>
Thomas Lockhart wrote:
> ...
> > > We do need a solution for exact dump/reload of floating-point data,
> > > but I don't see why the lack of it should be reason to disable access
> > > to the LINE type.
> > I don't understand why dumping the two point values isn't sufficient.
>
> Which two point values? LINE is handled as an equation, not as points,
> unlike the LSEG type which has two points.
Well, the \dT documentation used to show line as two points, so I
assumed that was how it was specified.
> One possibility is to have the external representation *be* the same as
> LSEG, then convert internally. Then we need to decide how to scale those
> points; maybe always using a unit vector is the right thing to do...
No one likes entering an equation. Two points seems the simplest.
--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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To: pgsql-sql@postgresql.org
Cc: pgman@candle.pha.pa.us, lockhart@fourpalms.org, tgl@sss.pgh.pa.us, tjhart@mac.com, pgsql-hackers@postgresql.org
Subject: Re: [SQL] line datatype
In-Reply-To: <200207161538.g6GFcS925954@candle.pha.pa.us>
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