SQL Server Native Client (SNAC) is not supported beyond SQL Server 2012. Avoid using SNAC in new development work, and plan to modify applications that currently use it. The Microsoft ODBC Driver for SQL Server provides native connectivity from Windows to Microsoft SQL Server and Microsoft Azure SQL Database.
By default, the SQL Server Native Client ODBC driver closes a statement's associated cursor when SQLEndTran commits or rolls back an operation. Server cursors are closed unless they are static. When SQLEndTran commits or rolls back an operation, the behavior of the statement's associated cursor is determined by the value of the driver-specific ODBC connection attribute SQL_COPT_SS_PRESERVE_CURSORS, set by SQLSetConnectAttr.