Andrew Dunstan <andrew@dunslane.net> writes:
> I fully agree it's not bulletproof, but I'm not sure what alternative there
> is.
If you know the type has been installed as an extension you can look at
the extension's content in pg_depend, much like \dx+ does, limiting to
only types whose name matches.
Regards,
--
Dimitri Fontaine
http://2ndQuadrant.fr PostgreSQL : Expertise, Formation et Support