DROP [ PROCEDURAL ] LANGUAGE name [ CASCADE | RESTRICT ]
The name of an existing procedural language. For backward compatibility, the name may 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 there are any dependent objects. This is the default.
DROP PROCEDURAL LANGUAGE will remove the definition of the previously registered procedural language called name.
The DROP PROCEDURAL LANGUAGE statement is a PostgreSQL language extension.
Refer to CREATE LANGUAGE for information on how to create procedural languages.