From: Christopher Kings-Lynne <chriskl@familyhealth.com.au>
To: nolan@celery.tssi.com
To: The Hermit Hacker <scrappy@postgresql.org>
Cc: The Hermit Hacker <scrappy@postgresql.org>
Cc: Jan Wieck <JanWieck@Yahoo.com>
Cc: Bruce Momjian <pgman@candle.pha.pa.us>
Cc: Josh Berkus <josh@agliodbs.com>
Cc: Joe Conway <mail@joeconway.com>
Cc: \"\"\"Advocacy PostgreSQL\"\"\" <pgsql-advocacy@postgresql.org>
Cc: PostgreSQL-general <pgsql-general@postgresql.org>
Subject: Re: [GENERAL] interesting PHP/MySQL thread
Date: Mon, 23 Jun 2003 13:54:07 +0800
Message-ID: <029201c3394b$dc63e310$2800a8c0@mars> (raw)
References: <20030623053352.1457.qmail@celery.tssi.com>
> Also, unlike PostgreSQL (at least in 7.3), if you define an index on
> the column, mysql appears to use it for LIKE queries.
>
> "SELECT * FROM table WHERE field LIKE 'nolan%';"
Nonsense. PostgreSQL indexes such a thing quite happily. I've used that a
lot.
> is very fast in mysql but not in 7.3, and even non-anchored LIKE searches
> in mysql appear to be using the index.
>
> "SELECT * FROM table WHERE field LIKE '%nolan%';"
>
> executes considerably faster with an index on field than without one.
Hmmm - that seems iffy to me - have they invented a new field of index
theory?
Chris
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Cc: chriskl@familyhealth.com.au, nolan@celery.tssi.com, scrappy@postgresql.org, JanWieck@Yahoo.com, pgman@candle.pha.pa.us, josh@agliodbs.com, mail@joeconway.com, pgsql-advocacy@postgresql.org, pgsql-general@postgresql.org
Subject: Re: [GENERAL] interesting PHP/MySQL thread
In-Reply-To: <029201c3394b$dc63e310$2800a8c0@mars>
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