Re: Need advice for migration to pgsql
On 13 Aug 1997, Siggy Brentrup wrote:
> Then, the v6.1.1 INSTALL file instructs to use the pg_dumpall utility
> from v6.1 up to backup an existing database.
>
> Since pgsql replaces files from postgres95, the backup has to be run
> before pgsql is unpacked or postgres95 is removed.
>
> I'm thinking of a postgres95-migrate package where pgsql predepends
> upon. Its postinst will check for postgres95 being installed and only
> when this test succeeds prompt the user whether existing databases are
> to be dumped. The postinst will only succeed when postgres95 is not
> installed or existing databases have been successfully dumped.
I propose a simpler (IMHO) method:
pgsql Conflicts: with postgres95, but does NOT replace it. In case of
conflict, pgsql's preinst gives a warning and tell the command to run to
uninstall postgres95 properly. (a bit like the conversion from the old TeX
distribution to the new TeTeX).
I really dislike the idea of having a wrapper package (which given the
Pre-Depends: line, even people who don't use postgres95 will be forced to
install).
Cordialement,
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