From: Andrew Sullivan <ajs@crankycanuck.ca>
To: pgsql-sql@postgresql.org
Subject: Re: concurrency problem
Date: Mon, 19 Jun 2006 11:28:50 -0400
Message-ID: <20060619152850.GD31354@phlogiston.dyndns.org> (raw)
In-Reply-To: <ee0ad3a30606162053j1533b7e2o16d05a7e0fe7d944@mail.gmail.com>
References: <ee0ad3a30606152114g122d0021ja7c603a8f36ae62c@mail.gmail.com>
<20060616140855.72700.qmail@web52513.mail.yahoo.com>
<ee0ad3a30606162053j1533b7e2o16d05a7e0fe7d944@mail.gmail.com>
On Sat, Jun 17, 2006 at 09:23:17AM +0530, sathish kumar shanmugavelu wrote:
> I fetch the consultatioin_no and add one to it, i should know this
> consultation_no to save the other 10 tables. because i use this number as
Don't do that. Fetch the number from a sequence first: select
nextval(). Then you can insert it as currval() for all your other
INSERTs. No, there is no race condition or concurrency problem: see
the docs on these functions. No locks.
A
--
Andrew Sullivan | ajs@crankycanuck.ca
When my information changes, I alter my conclusions. What do you do sir?
--attr. John Maynard Keynes
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To: pgsql-sql@postgresql.org
Cc: ajs@crankycanuck.ca
Subject: Re: concurrency problem
In-Reply-To: <20060619152850.GD31354@phlogiston.dyndns.org>
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