This variable lets you specify a particular ODBC SQL Server driver name for the SQL Server interface. SQL Server is the value set by default, and is the most commonly found name; however, if you intend to use a different driver, set the value to the name of the intended driver, as shown in the ODBC Data Source dialog box (Windows) or odbcinst.ini (UNIX/Linux). Results are undefined if changed to a value which is not a valid supported SQL Server ODBC driver on your system.