Re: DROP ROLE prevented by dependency

From: "Bulgrien, Kevin" <Kevin(dot)Bulgrien(at)GDSATCOM(dot)com>
To: "'pgsql-general(at)postgresql(dot)org'" <pgsql-general(at)postgresql(dot)org>
Subject: Re: DROP ROLE prevented by dependency
Date: 2012-01-06 19:27:58
Message-ID: 83894A1821034948BA27FE4DAA47427928F7C29922@apde03.APD.Satcom.Local
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> -----Original Message-----
> From: Tom Lane [mailto:tgl(at)sss(dot)pgh(dot)pa(dot)us]
> Sent: Friday, January 06, 2012 12:22 PM
> To: Bulgrien, Kevin
> Cc: 'pgsql-general(at)postgresql(dot)org'
> Subject: Re: [GENERAL] DROP ROLE prevented by dependency
> > I have no idea what the procedure is for figuring out how
> > to drop this role:
> > DROP ROLE myuser;
> > ERROR: role "myuser" cannot be dropped because some
> > objects depend on it
> > DETAIL: 1 objects in database postgres
> Try the command while connected to the postgres database. It
> can't give you more detail than that from where you are, for
> lack of visibility into the other database's system catalogs.

Hah. I was connecting to template1 to do the DROP, so I changed to
postgres and got:

DROP ROLE myuser;
ERROR: role "myuser" cannot be dropped because some objects depend on it
DETAIL: 1 objects in database template1

That jostled loose a clue. That seemed to imply that ROLE myuser
had some setup (GRANT/REVOKE) done in both postgres AND template1.

After undoing all custom ROLE setup in both template1 (GRANT/REVOKE)
in postgres AND template1, the ROLE dropped fine.

Apparently the database that is connected when ROLE GRANTS and
REVOKES are done is tied to the database - so it can only be undone
by connecting to the same database. I have to be consistant about
doing the role management consistently in the same database
context. Normally I do all the database owner ROLE stuff when
connected to template1, but somehow that user had some setup
in both template1 and postgres. I vaguely remember connected to
postgres some time ago when trying to figure out how to dump the
global data not associated with an application database. I must
have "forgotten" which context I was in when playing around with
the ROLE.

It's fixed now. Thanks for the tip! I think I learned
something important in the process.

Kevin Bulgrien

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