Žiga Kranjec <ziga@ljudmila.org> writes:
> This might be a silly idea, but I'm not sure if it was really
> discussed with respect to extensions here before...
yes, it was ...
> Why not use PL/pgSQL as install/upgrade script language,
> specially now when it's included in the core by default?
"Included by default" does not mean "required to be present".
It can be removed, and we can't have that mean breaking the extension
mechanism.
regards, tom lane