DROP_TYPE (7) - Linux Manuals
DROP_TYPE: remove a data type
DROP_TYPE - remove a data type
DROP TYPE [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]
- Do not throw an error if the type does not exist. A notice is issued in this case.
- The name (optionally schema-qualified) of the data type to remove.
- Automatically drop objects that depend on the type (such as table columns, functions, operators).
- Refuse to drop the type if any objects depend on it. This is the default.
To remove the data type box:
DROP TYPE box;
This command is similar to the corresponding command in the SQL standard, apart from the IF EXISTS option, which is a PostgreSQL extension. But note that much of the CREATE TYPE command and the data type extension mechanisms in PostgreSQL differ from the SQL standard.