From: Tom Lane <tgl@sss.pgh.pa.us>
To: Luis P Caamano <lcaamano@mindspring.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Can statement_timeout emulated NOWAIT?
Date: Tue, 16 Mar 2004 10:48:26 -0500
Message-ID: <25031.1079452106@sss.pgh.pa.us> (raw)
In-Reply-To: <DIEAJDKECNMGBBCLCGFFAEHPCGAA.lcaamano@mindspring.com>
References: <DIEAJDKECNMGBBCLCGFFAEHPCGAA.lcaamano@mindspring.com>
"Luis P Caamano" <lcaamano@mindspring.com> writes:
> I've researched the recent discussions about statement_timeout
> and NOWAIT and I'd like to confirm my understanding of the
> situation before acting on it. Please let me know if the
> following statements are true:
> - LOCK TABLE ... NOWAIT has been checked in and will be available
> in 7.5
Yes.
> - SELECT ... FOR UPDATE NOWAIT is in the TODO list (among other
> NOWAIT commands) but it will also be available in 7.5
I haven't seen anyone working on that.
> - Using "SET LOCAL statement_timeout=xxx" can be used before
> "SELECT ... FOR UPDATE" to emulate NOWAIT when the select
> is simple and involves a relatively small number of rows.
Yes, if you are sure you know how long the select "ought" to take.
> - The error raised by statement_timeout and NOWAIT will be the
> same.
Wouldn't expect so. (Right now, I think statement_timeout reports
the same error code as query cancel, which is pretty bogus also.)
regards, tom lane
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: tgl@sss.pgh.pa.us, lcaamano@mindspring.com
Subject: Re: Can statement_timeout emulated NOWAIT?
In-Reply-To: <25031.1079452106@sss.pgh.pa.us>
* 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