From: Neil Conway <neilc@samurai.com>
To: Josh Berkus <josh@agliodbs.com>
Cc: Karl O. Pinc <kop@meme.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Using LIMIT 1 in plpgsql PERFORM statements
Date: Mon, 24 Oct 2005 00:40:10 -0400
Message-ID: <1130128810.8506.25.camel@localhost.localdomain> (raw)
In-Reply-To: <200510232136.35790.josh@agliodbs.com>
References: <1129957521l.27845l.2l@mofo>
<200510231402.35612.josh@agliodbs.com>
<1130114418l.8670l.2l@mofo>
<200510232136.35790.josh@agliodbs.com>
On Sun, 2005-23-10 at 21:36 -0700, Josh Berkus wrote:
> SELECT id INTO v_check
> FROM some_table ORDER BY id LIMIT 1;
>
> IF id > 0 THEN ....
>
> ... that says pretty clearly to code maintainers that I'm only interested in
> finding out whether there's any rows in the table, while making sure I use
> the index on ID.
Why would you want to use the index on ID?
-Neil
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To: pgsql-performance@postgresql.org
Cc: neilc@samurai.com, josh@agliodbs.com, kop@meme.com
Subject: Re: Using LIMIT 1 in plpgsql PERFORM statements
In-Reply-To: <1130128810.8506.25.camel@localhost.localdomain>
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