class PostgresField implements Field {
private $name, $tablename, $type, $nullable, $max_length, $deferred, $deferrable, $conname,
$has_default, $default;
class PostgresField implements Field {
private $name, $tablename, $type, $nullable, $max_length, $deferred, $deferrable, $conname,
$has_default, $default;