If the UDF library for your database contains any objects with multibyte characters in their name, you cannot use a single-byte session character set to create a new UDF, UDT, method, or Java stored procedure object even if the new object name contains only single-byte characters. Otherwise, the system returns an error to the requestor. Instead, use a multibyte session character set.
See
Teradata Vantage™ - SQL Fundamentals, B035-1141 for the rules for naming database objects.
Note that the creation of a structured type consumes two names in the
TVMNameI name space for SYSUDTLIB: