Re: Postgres Backup Utility

Brad,
Google for "SQL Power Architect", download it, and try a schema comparison.  That might get you a ways down to road to what you want.
Bob Lunney

--- On Wed, 1/19/11, French, Martin <frenchm(at)cromwell(dot)co(dot)uk> wrote:

From: French, Martin <frenchm(at)cromwell(dot)co(dot)uk>
Subject: Re: [ADMIN] Postgres Backup Utility
To: "Bradley Holbrook" <operations_bradley(at)servillian(dot)ca>
Cc: pgsql-admin(at)postgresql(dot)org
Date: Wednesday, January 19, 2011, 2:12 AM

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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