Re: Postgres Backup Utility

Ok, you say that you cannot drop and recreate, so you need to do this
via alter statements only? That's obviously going to complicate matters,
as a straight dump, drop, recreate, restore would be the fastest and by
far simplest method.

So, Ideally, you'll need to do a table def comparison over the two
databases, and generate the necessary sql to amend the tables in test
accordingly?

Querying the pg_catalog/information_schema over the two db's should give
you the table ddl from which you can diff, and then generate the alter
statements from the results.

Cheers

Martin

From: Bradley Holbrook [mailto:operations_bradley(at)servillian(dot)ca]
Sent: 18 January 2011 16:57
To: French, Martin
Cc: pgsql-admin(at)postgresql(dot)org
Subject: RE: [ADMIN] Postgres Backup Utility

Well, I can't just go dropping and recreating tables... it needs to
create the correct alter statements if existing tables and or functions
already exist.

Secondly, when I'm finished changing the structure, I need to be able to
select the list of tables that will have content updates.

Using a script might be more work maintaining then it's worth. I have a
backup utility that can do the job, but 3 tedious steps per schema, that
only work about 10% of the time (and no batching options so that I can
create a list of actions and run the list).

From: French, Martin [mailto:frenchm(at)cromwell(dot)co(dot)uk]
Sent: January-18-11 5:47 AM
To: Bradley Holbrook; pgsql-admin(at)postgresql(dot)org
Subject: RE: [ADMIN] Postgres Backup Utility

I'm assuming that this needs to be tightly controlled and as such a
replication tool is out of the question?

In that case; The first thing to pop into my head here would be to use
either use shell scripting, or to use the pg API and write a c program
to handle it.

I remember doing something very similar with Oracle a few years back.

Cheers

Martin

From: pgsql-admin-owner(at)postgresql(dot)org
[mailto:pgsql-admin-owner(at)postgresql(dot)org] On Behalf Of Bradley Holbrook
Sent: 18 January 2011 00:08
To: pgsql-admin(at)postgresql(dot)org
Subject: [ADMIN] Postgres Backup Utility

Hello!

First day on the new mailing list as I have need of some expert's
advice.

I need to be able to quickly apply the structure updates from a
development database to a testing database, and do selective data
updates (like on lookup tables, but not content tables).

Any help would be appreciated!

Brad

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