/**
* Set the default collation of the MSSQL nvarchar fields that we create.
* We don't apply this to the database as a whole, so that we can use unicode collations.
*/
public static function set_collation($collation)
{
self::$collation = $collation;
}
/**
* Return a varchar type-formatted string
*
* @params array $values Contains a tokenised list of info about this data type
* @return string
*/
public function varchar($values)
{
$collation = MSSQLDatabase::get_collation();
$collationSQL = $collation ? " COLLATE {$collation}" : "";
return "nvarchar(" . $values['precision'] . "){$collationSQL} null";
}