Martijn van Oosterhout writes:
> > By the way, PostgreSQL does support multiple storage managers; not as
> > easily today as in the early days, but that is mostly due to the fact that
> > no one ever wanted to replace the current one.
>
> Does this mean that in the 7.1 tree one could include the storage manager
> for 7.0, thus being able to read both types, or is it more complicated than
> that?
The storage manager hasn't changed in principle since 6.5. What has
changed is the system catalog structure and contents. (Recall the
pg_upgrade program that was available for 6.5->7.0 transition. It would
copy the data files right over.)
--
Peter Eisentraut peter_e@gmx.net http://funkturm.homeip.net/~peter