Re: Major upgrade of PostgreSQL and MySQL

On 9/12/2013 11:11 AM, Patrick Dung wrote:
> While reading some manual of PostgreSQL and MySQL (eg.
> http://dev.mysql.com/doc/refman/5.1/en/upgrading-from-previous-series.html)
>
> I have found that MySQL has stated many incompatibilities and know
> issues (a long list) in the MySQL version 5.0, 5.1, 5.5, 5.6 and 5.7.
>
> For PostgreSQL, it seems I can't find the list (it just say see the
> Appendix E / release notes).
> I think it is a plus for PostgreSQL if it has few incompatibilities
> between major versions.
>
> By the way, for in-place major version upgrade (not dumping DB and
> import again), MySQL is doing a better job in here.
>
> Please share your thought, thanks.
>
pg_upgrade will do an in-place upgrade if you wish. It is somewhat
risky if not done using a COPY (it can either copy or not, as you wish)
but it's considerably faster than a dump/restore and is "in-place."

I use it regularly.

--
Karl Denninger
karl(at)denninger(dot)net
/Cuda Systems LLC/