ODBC Driver for Teradata uses the application code page for Unicode to user-defined session character set conversions unless a translation DLL is specified. A user-defined session character set can be defined using the setup program. The following figure provides an example, using the ODBC Driver Setup for Teradata Database dialog box. A character set called userdefined is set.
During logon, the session character set does not read userdefined. This is correct because translation DLLs are loaded after logon. For instance, ASCII is used to logon to the database and then the translation DLL is loaded and used for conversions between Unicode and the session character set.