MDAC 2.5 SDK - ODBC Programmer's Reference
Appendix G: Driver Guidelines for Backward Compatibility
When an ODBC 2.x application working with an ODBC 3.x driver calls SQLSetPos with an Operation argument of SQL_ADD, the Driver Manager does not map this call to SQLBulkOperations. If an ODBC 3.x driver should work with an application that calls SQLSetPos with SQL_ADD, the driver should support that operation.
One major difference in behavior when SQLSetPos is called with SQL_ADD occurs when it is called in state S6. In ODBC 2.x, the driver returned S1010 when SQLSetPos was called with SQL_ADD in state S6 (after the cursor has been positioned with SQLFetch). In ODBC 3.x, SQLBulkOperations with an Operation of SQL_ADD can be called in state S6. A second major difference in behavior is that SQLBulkOperations with an Operation of SQL_ADD can be called in state S5, while SQLSetPos with an Operation of SQL_ADD cannot. For the statement transitions that can occur for the same call in ODBC 3.x, see Appendix B, "ODBC State Transition Tables."