Re: Migration from 8.0 to 7.4...

Romain,

If you're using JDBC and the V3 protocol is hurting you (which was my
case at one point), you can force the 8.0 driver to use the V2 protocol
which does a lot of things differently. For a quick solution that could
work until you fix your code to properly work with V3.

Just shooting in the dark...

Csaba.


On Mon, 2005-10-24 at 10:02, Romain Vinot wrote:
> Hi,
>
> We've got a problem with postgres 8.0 (our own code is not ready yet for
> the new driver) but a production database is already on postgres 8.0
> (too bad, we didn't tested it enough...).
>
> So we need to migrate back to postgres 7.4 and wait for a code upgrade.
> Is there a possible way to do this ?
>
> pg_dump output of 8.0 is not compatible with 7.4. But the output of
> "pg_dump -a" seems to be compatible.
> One solution would be to create tables with a 7.4 sql script. Then use
> pg_dump to get the data from the 8.0 database and fill them in the 7.4
> database. And finally restore all functions and triggers from a 7.4 sql
> script.
>
> Before testing this way, I would like your advise to know if our
> solution has a chance to work, if there is a better way or anything...
>
> Thanks for any help