postgresql-extensions

How do I list all extensions that are already installed in a database or schema from psql? See also Finding a list of available extensions that PostgreSQL ships with In psql that would be \dx See the manual for details: http://www.postgresql.org/docs/current/static/app-psql.html Doing it in plain SQL it would be a select on pg_extension : SELECT * FROM pg_extension http://www.postgresql.org/docs/current/static/catalog-pg-extension.html Additionally if you want to know which extensions are available on your server: SELECT * FROM pg_available_extensions This SQL query gives output similar to \dx

I'm working on a project that needs to use hstore on multiple schemas. The 'public' schema, where the hstore extension was being installed isn't available everywhere, because my scope doesn't lookup at 'public'. On some tryouts, I've created the extension on a schema called 'hstore' and used the schema on every available scope (search path) used. Based on this, I've some questions: Is it ok to create a schema just for the extension? Or is it better to create the extension on every single schema (like, customer_1 , customer_2 , and so on...)? Does the creation of the extension in a separate