postgres=# -- Querying a system table: pg_language
postgres=#
postgres=# SELECT * FROM pg_language;
lanname | lanispl | lanpltrusted | lanplcallfoid | lanvalidator | lanacl
----------+---------+--------------+---------------+--------------+--------
internal | f | f | 0 | 2246 |
c | f | f | 0 | 2247 |
sql | f | t | 0 | 2248 |
(3 rows)
postgres=#