Re: Migration from 8.0 to 7.4...

Good point.

This is exactly my problem.

I tried to switch to the V2 protocol with the 8.0 JDBC driver. But in
this case, I have the same behavior than with the 7.4 driver working on
the 8.0 database.

To answer Richard Huxton : the problem of JDBC 7.4 driver with a 8.0
database is that autocommit/commit/rollback doesn't work anymore. And I
have also this behavior with a 8.0 JDBC driver and V2 protocol.

So, I'm back to my first point...

Csaba Nagy a écrit :
> 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
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
>        choose an index scan if your joining column's datatypes do not
>        match
>

--
Romain Vinot - Ingénieur R&D
Akio Software
43, rue de Dunkerque
Tel : 01 53 20 63 80