postgresql - 使用 psql 如何列出安装在数据库中的扩展？

Question

如何从 psql 列出已安装在数据库或模式中的所有扩展？

也可以看看

• 查找 PostgreSQL 附带的可用扩展列表

Answer 1

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;

Answer 2

此外，如果您想知道您的服务器上有哪些扩展可用：SELECT * FROM pg_available_extensions.

见pg_available_extensions和pg_available_extension_versions。

Answer 3

此 SQL 查询给出的输出类似于\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;

感谢https://blog.dbi-services.com/listing-the-extensions-available-in-postgresql/