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Re: proposed FAQ entry

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: David Gardner <david(at)gardnerit(dot)net>
Cc: pgsql-docs(at)postgresql(dot)org
Subject: Re: proposed FAQ entry
Date: 2007-06-29 01:06:20
Message-ID: 200706290106.l5T16KU18798@momjian.us (view raw or flat)
Thread:
Lists: pgsql-docs
David Gardner wrote:
> Earlier today I was tempted to start storing usesysid's as foreign keys 
> in one of my tables by doing:
> SELECT usesysid FROM pg_user WHERE pg_user.usename= user;
> 
> My proposed FAQ entry is based on this mailing list post which convinced 
> me not to:
> http://archives.postgresql.org/pgsql-novice/2005-04/msg00328.php
> 
> 
> So the Question would be:
> 
> Q) How do I keep track of edits to a table? OR Can I use store usesysid 
> in my table to identify users?
> 
> A) No because usesysid values are not guaranteed to remain the same 
> after a restore, or upgrade. Instead store the user name as text, if 
> needed create your own user table and associate the user names with 
> integer keys.

Uh, sorry, this is not a _frequent_ question/issue.

-- 
  Bruce Momjian  <bruce(at)momjian(dot)us>          http://momjian.us
  EnterpriseDB                               http://www.enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +

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