Changing database type from mysql to mysqli- affects?
 

Can you just change the database type to mysqli in config.php without doing anything else? It has been set this way since installed.

// Valid options are mysql and mysqli, for slave support add _slave. Try to use mysqli if you are using PHP 5 and MySQL 4.1+
// for slave options just append _slave to your preferred database type.
$config['Database']['dbtype'] = 'mysql';

Thanks for your help