Re: Finer Extension dependencies

Excerpts from Dimitri Fontaine's message of vie mar 23 16:51:57 -0300 2012:
>
> Alvaro Herrera <alvherre@commandprompt.com> writes:
> >> Yes, for pg_depend, no I don't know how to make that work with pointing
> >> to the extensions directly, because the whole point here is to be able
> >> to depend on a feature rather than the whole extension.
> >
> > Yes, I understand that -- but would it work to have the feature
> > resolution be done at install/upgrade time, and once it's resolved, you
> > record it by storing the extension than contains the feature?  That way
>
> I don't think so, because at upgrade time you then typically only have
> the new .control file with the new set of features, and you need to
> act on the difference between the old and new features compared to the
> current other packages dependencies towards them.

Aha, right.

So you still need an index on (oid), one on (extoid), and one on
(extfeature).

--
Álvaro Herrera <alvherre@commandprompt.com>
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