Carsten Kropf <ckropf2@fh-hof.de> writes:
> I wanted to ask, if there is a method to determine the oid of a
> certain type using the C backend interface?
Starting from what?
For built-in types it's usual practice to use the #define from
pg_type.h, if there is one. If you have a string name for the type,
there's a parser function to derive an OID, which I forget the name
of but it's probably in parse_type.c.
regards, tom lane