DB Migration 8.4 -> 8.3

--- On Mon, 15/6/09, Eoghan Murray <eoghanomurray@gmail.com> wrote:

From: Eoghan Murray <eoghanomurray@gmail.com>
Subject: [GENERAL] DB Migration 8.4 -> 8.3
To: pgsql-general@postgresql.org
Date: Monday, 15 June, 2009, 10:19 PM
I unintentionally installed 8.4beta2
on a server (using yum), while I
run 8.3.7 on my dev machine.
The 8.3 version of pg_dump does not work with the server,
even with
the -i option:
   8.3: pg_dump: Error message from server:
ERROR:  column
"reltriggers" does not exist
the 8.4 pg_dump works okay, but then the 8.3 version of
pg_restore is
not able to restore the resultant databases:
   8.3: pg_restore: [archiver] input file
does not appear to be a
valid archive

Try the 8.4 pg_restore against the 8.3 server

2009/6/15 Glyn Astill <gl*******@yahoo.co.uk>:

Try the 8.4 pg_restore against the 8.3 server

Thanks!, that worked!
FWIW I set up an ssh connection with the reverse/remote forwarding
option -R

Also the error message on pg_restore should have read:

8.3: pg_restore: [archiver] unsupported version (1.11) in file
header

Eoghan Murray <eoghanomurray@gmail.com> writes:

How can I migrate a database from 8.4 to 8.3?

The only way is to dump to text (no -Fc or -Ft) with 8.4's pg_dump,
and then manually edit the file until 8.3 will take it.

8.3: pg_restore: [archiver] input file does not appear to be a
valid archive

It's possible here that your only mistake was using -Fc. That format
isn't necessarily backwards-compatible.

regards, tom lane