DROP EXTENSION removes extensions from the database. Dropping an extension causes its component objects to be dropped as well.
You must own the extension to use DROP EXTENSION.
Do not throw an error if the extension does not exist. A notice is issued in this case.
The name of an installed extension.
Automatically drop objects that depend on the extension.
Refuse to drop the extension if any objects depend on it (other than its own member objects and other extensions listed in the same DROP command). This is the default.