RENAME FUNCTION (External Form)
RENAME FUNCTION (External Form) and UDTs
You cannot directly change the name of a UDF that performs the role of a transform, ordering, or cast for a UDT. Otherwise, Teradata Database aborts the request and returns an error to the requestor.
To do this you must first drop the corresponding transform, ordering, or cast definitions and after you have done so, rename the UDT. For information about how to drop a cast, ordering, or transform, see “DROP CAST” on page 793, “DROP ORDERING” on page 806, or “DROP TRANSFORM” on page 812.