14 The SQL Server Classic Wire Protocol Driver : Unicode Support

Unicode Support
The SQL Server Classic Wire Protocol driver maps the Microsoft SQL Server data types to Unicode data types as shown in the following table:
 

1
Supported only for Microsoft SQL Server 2005 and higher.

The driver supports the Unicode ODBC W (Wide) function calls, such as SQLConnectW. This allows the Driver Manager to transmit these calls directly to the driver. Otherwise, the Driver Manager would incur the additional overhead of converting the W calls to ANSI function calls, and vice versa.
See “UTF-16 Applications on UNIX and Linux” for related details. Also, Refer to Chapter 4 “Internationalization, Localization, and Unicode” in the DataDirect Connect Series for ODBC Reference for a more detailed explanation of Unicode.