Just an idea, but I would try to:
- pg_dump both schemas in 'custom' format
- extract TOC from each one
- use the lists as a basis for compare
(i guess that's what pgdiff does, maybe it just needs minor patch to
extend its functionality )
2007/10/12, Tomi N/A <hefest@gmail.com>:
> Looking at the mailing list archive, this is just one in a rather long
> line of questions regarding diffing db schema dumps, but I've been
> unable to find what I was looking for in any of the prior
> conversations. I know of apgdiff (seems to work very nicely) and of
> other specialized pg diff tools (as outdated or proprietary as they
> may be), but what I'm interested in is just a plain, basic schema dump
> with a database object order usable with diff.
> I can't find it now, but I'm fairly certain I've read somewhere (in
> the release changes of an 8.x pgsql version?) that pg_dump has been
> "upgraded" so that it orders database objects fist by their
> dependencies and then by name. I thought that would imply that dumping
> the database like so
> pg_dump -f out.sql -F p -s a_db
> would give me an sql script which I could compare versions of with
> plain old diff or svn diff or whatever existing diff tool I care to
> use.
>
> I guess my question is: is pg_dump supposed to dump the schema in a
> diff-compatible, predictable way but it's not working or is pg_dump
> only concerned with satisfying db object dependencies?
> I would very much like this functionality because it would make pgsql
> much better integrated into the work environment we have setup at the
> office (using e.g. svn diff would be very nice). Tools like apgdiff
> don't help as much: it great that it's command line (can be
> automated), it does it job well, but it sitll only tells me e.g. that
> a view is different, rather than showing me _how_ it is different or
> allowing me to compare object definitions using a generic diff - which
> is what I really want.
>
> Sorry for the confusing trail of thought and thanks for any comments,
> t.n.a.
>
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--
Filip Rembiałkowski
