DROP_TYPE - remove a data type

       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 CREATETYPE command and the data type
       extension mechanisms in PostgreSQL differ from the SQL standard.

DROPTYPE removes a user-defined data type. Only the owner of a type can remove it.

       To remove the data type box:

           DROP TYPE box;

       DROP_TYPE - remove a data type

       IF EXISTS
           Do not throw an error if the type does not exist. A notice is issued in this case.

       name
           The name (optionally schema-qualified) of the data type to remove.

       CASCADE
           Automatically drop objects that depend on the type (such as table columns, functions, and operators),
           and in turn all objects that depend on those objects (see Section 5.15).

       RESTRICT
           Refuse to drop the type if any objects depend on it. This is the default.

       ALTER TYPE (ALTER_TYPE(7)), CREATE TYPE (CREATE_TYPE(7))

PostgreSQL 17.5                                       2025                                          DROPTYPE(7)

       DROP TYPE [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]