How do I list all extensions that are already installed in a database or schema from psql?
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4 Answers
In psql that would be
\dx
See the manual of psql for details.
Doing it in plain SQL it would be a select on pg_extension:
SELECT *
FROM pg_extension;
Additionally if you want to know which extensions are available on your server: SELECT * FROM pg_available_extensions.
See pg_available_extensions and pg_available_extension_versions.
This SQL query gives output similar to \dx:
SELECT e.extname AS "Name", e.extversion AS "Version", n.nspname AS "Schema", c.description AS "Description"
FROM pg_catalog.pg_extension e
LEFT JOIN pg_catalog.pg_namespace n ON n.oid = e.extnamespace
LEFT JOIN pg_catalog.pg_description c ON c.objoid = e.oid AND c.classoid = 'pg_catalog.pg_extension'::pg_catalog.regclass
ORDER BY 1;
Thanks to
Just a comment that whether you run as suggested above, in psql either
\dx
or
select extname from pg_extension ;
Keep in mind that
- Make sure you are connected to the right database. As your extensions are loaded database specific.
- Any extensions added to template1 database will by definition, appear on all databases.
