discourse=# postgres -c 'psql discourse'
discourse-# \dx
List of installed extensions
Name | Version | Schema | Description
----------+---------+------------+-------------------------------------------------------------------
hstore | 1.7 | public | data type for storing sets of (key, value) pairs
pg_trgm | 1.5 | public | text similarity measurement and index searching based on trigrams
plpgsql | 1.0 | pg_catalog | PL/pgSQL procedural language
unaccent | 1.1 | public | text search dictionary that removes accents
vector | 0.7.2 | public | vector data type and ivfflat access method
(5 rows)