From: Tom Lane It's probably mostly historical accident :-(. There have been suggestions before to convert more system catalog columns to regfoo types, but there's serious stumbling blocks in the way:
Thank you so much for concise detailed explanation of the history and current situation. I understood that it would do more harm than good to change existing plain oid columns to reg* types for various clients, and it wouldn't very beneficial but also not so harmful to make new catalogs/columns reg* types. Regards MauMau -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
