Suppose I have defined an additional type in a PG extension. Is it possible to add custom accessors to that type -much like jsonb does- but use an API/hook without touching the core PG grammar & parser? Hypothetical Examples: Assuming I have a TextFile type I’d like to implement syntax like: (‘/home/me/a.txt’::TextFile).firstline (‘/home/me/a.txt’::TextFile).lastline (‘/home/me/a.txt’::TextFile).countlines() (‘/home/me/a.txt’::TextFile).size() (‘/home/me/a.txt’::TextFile).datemodified() The only relevant patch I could find is [1] but it’s a dead-end [1] https://www.postgresql.org/message-id/20210501072458.adqjoaqnmhg4l34l%40nol
