public function __construct(\PDO $connection, $tableName, $schemaName = 'public')
{
parent::__construct($connection, $tableName);
$driver = $this->connection->getAttribute(PDO::ATTR_DRIVER_NAME);
$this->quote = in_array($driver, array('mysql', 'pgsql')) ? '"' : '`';
$this->schemaName = $schemaName;
}