使用psql如何列出数据库中安装的扩展？

Question

如何列出psql中已安装在数据库或模式中的所有扩展名？

另见

• Finding a list of available extensions that PostgreSQL ships with

Answer 1

在psql中将是

\dx

有关详细信息，请参阅手册：http://www.postgresql.org/docs/current/static/app-psql.html

在纯SQL中执行它，它将是pg_extension上的选择：

SELECT * 
FROM pg_extension

http://www.postgresql.org/docs/current/static/catalog-pg-extension.html

Answer 2

此外，如果您想知道服务器上有哪些可用的扩展程序：SELECT * FROM pg_available_extensions

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/