Note: The following description applies both to Postgres-XC and PostgreSQL if not described explicitly. You can read PostgreSQL as Postgres-XC except for version number, which is specific to each product.
DROP LANGUAGE removes the definition of a previously registered procedural language. You must be a superuser or the owner of the language to use DROP LANGUAGE.
Note: As of PostgreSQL 9.1, most procedural languages have been made into "extensions", and should therefore be removed with DROP EXTENSION not DROP LANGUAGE.
Note: The following description applies both to Postgres-XC and PostgreSQL if not described explicitly. You can read PostgreSQL as Postgres-XC except for version number, which is specific to each product.
Do not throw an error if the language does not exist. A notice is issued in this case.
The name of an existing procedural language. For backward compatibility, the name can be enclosed by single quotes.
Automatically drop objects that depend on the language (such as functions in the language).
Refuse to drop the language if any objects depend on it. This is the default.