From: Jeffrey Tenny <jeffrey.tenny@comcast.net>
To: pgsql-sql@postgresql.org
Subject: Atomic query and update of sequence generators
Date: Wed, 14 Jan 2004 19:51:49 -0500
Message-ID: <4005E425.2070706@comcast.net> (raw)
If I want to allocate a block of adjacent values from a sequence generator,
is the following statement atomic with respect to the time between
when the call to nextval() and setval()?
SELECT setval('foo', nextval()+20) ...
The goal is to get a sequence of 20 values that are all +1 from each other.
If the above isn't safe in concurrent environments, is there something
else I can
do to achieve the effect safely?
I saw a similar unanswered question on one of the PostgreSQL newsgroups,
and have a need to do the same thing from my JDBC app.
Tips appreciated.
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To: pgsql-sql@postgresql.org
Cc: jeffrey.tenny@comcast.net
Subject: Re: Atomic query and update of sequence generators
In-Reply-To: <4005E425.2070706@comcast.net>
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