On Wednesday 31 December 2008 05:50:19 Tom Lane wrote:
> That was part of the original concept for pg_pltemplate, but IIRC there
> was push-back from some folks who thought it was a bad idea. I don't
> recall what their arguments were exactly;
Basically, we have no information about what the proper parameters of external
languages would be. (We have some pretty good ideas, but that's not the
same.) Especially if we override the trusted/untrustedness, we could create
complete disaster.
Ultimately, as we add more loadable facilities (languages, plugins/modules,
foreign-data wrappers), we will need a better upgrade mechanism anyway than
maintaining our own override list of everything in the world. So let's just
leave this mechanism restricted to the built-in languages for now.