From: Richard Huxton <dev@archonet.com>
To: pgsql-sql@postgresql.org
Subject: Scalar in a range (but textual not numeric)
Date: Wed, 25 Feb 2004 19:18:20 +0000
Message-ID: <200402251918.20289.dev@archonet.com> (raw)
Large table representing non-overlapping blocks:
blocks(id int4, min varchar, max varchar)
SELECT * FROM blocks WHERE 'ABCDE' BETWEEN min AND max;
The estimator gets the wrong plan because it doesn't realise there's (at most)
only one block that can match.
Can't use any of the geometry related types since we've got text here not
numbers. Nothing in the archives seems quite right (AFAICT).
Any smart ideas? I'm happy to trade time when updating the blocks table
against lookup speed.
--
Richard Huxton
Archonet Ltd
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: dev@archonet.com
Subject: Re: Scalar in a range (but textual not numeric)
In-Reply-To: <200402251918.20289.dev@archonet.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox