Date: Fri, 3 Oct 2008 13:35:50 -0400
From: Alvaro Herrera <alvherre@commandprompt.com>
To: Julie Warden <Julie_Warden@nospam.hotmail.com>
Cc: pgsql-admin@postgresql.org
Subject: Re: pg_dump and roles
Message-ID: <20081003173550.GE3817@alvh.no-ip.org>
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Julie Warden wrote:

> Is there a method to dump just the roles from a database, or otherwise
> select them, so I can build a script to reload the roles? Otherwise, I
> guess I'll just read the tables for each database and build the
> security script from that.

Roles are not per-database; they are global objects.  You can get a dump
of all the roles with pg_dumpall -g.

If you really need to filter out roles per database, my best suggestion
is to filter a global role dump them with the pg_shdepend catalog for
each database.

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support