Consider this table that has a circle_t column:
CREATE circle_table(pkey INTEGER, circle circle_t);
This query requires that a transform exists for the circle_t UDT that transforms to the client representation (in this case VARCHAR(80)):
SELECT * FROM circle_table;
This query requires that an ordering exists for the circle_t UDT:
SELECT *
FROM circle_table
WHERE circle < NEW circle_t().x(128).y(128).radius(1).color('RED');