You can use the following SQL statements to drop the objects that were created for this example.
DROP CAST (circle_t AS VARCHAR(80)); DROP ORDERING FOR circle_t; DROP TRANSFORM circle_t_io FOR circle_t; DROP FUNCTION circle_t_tosql; ALTER TYPE circle_t DROP SPECIFIC METHOD circle_t_constructor; ALTER TYPE circle_t DROP SPECIFIC METHOD circle_t_cast; ALTER TYPE circle_t DROP SPECIFIC METHOD circle_t_ordering; ALTER TYPE circle_t DROP SPECIFIC METHOD circle_t_fromsql; DROP TYPE circle_t; DROP TYPE color_t;