Everything is now "required by the database system"

With the new dependency system we have the entire system catalog content
pinned down and unchangeable. This is a tiny dent in the nice extensible
nature of the system.

Would it be feasible to identify the non-essential parts of the built-in
objects (say, inet type, numeric type, associated functions, etc.) and
declare those with regular SQL commands in initdb? In the end, the system
catalog contents in include/catalog/ would only contain the "bootstrap"
content. For example, the pg_proc content could be made more manageable
that way.

Not sure if this is worth considering for this release, but it might be a
medium-term project.

Comments?

--
Peter Eisentraut peter_e(at)gmx(dot)net