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.
The SQL Server Native Client ODBC driver satisfies SQLNativeSql requests without visiting the server. The function efficiently tests the syntax of SQL statements. Syntax checking does not determine if identifiers or the results of expressions in the SQL statements are valid, and SQL Server native SQL returned by SQLNativeSql can fail to run.