uuid for each postgres install?

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From: Gerardo Herzig <gherzig@fmed.uba.ar>
To: pgsql-sql <pgsql-sql@postgresql.org>
Subject: uuid for each postgres install?
Date: Thu, 25 Sep 2014 17:02:27 -0300 (ART)
Message-ID: <1925720361.922357.1411675347958.JavaMail.root@fmed.uba.ar> (raw)
In-Reply-To: <1776688750.922326.1411675271595.JavaMail.root@fmed.uba.ar>
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Hi all. Im wondering if there is, maybe at compilation time, some sort of unique identifier who identifies the actual installation.

It would be even  better if can be accesed in SQL form.
At "initdb" time would be accepted, too.

Thanks!

Gerardo

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