pinker <pinker@onet.eu> writes:
> Is there any way to check from SQL or psql level if for roles LDAP
> Authentication is used? There is no information in pg_roles or pg_shadow.
Nope, sorry. That's determined by pg_hba.conf, which is intentionally
not exposed to clients (and wouldn't necessarily make the determination
on a per-role basis, either).
regards, tom lane