my @parts = (
$args->{from},
$self->format_keyword(join '_', ($args->{type}||()), 'join'),
- (map +($_->{-ident} || $_->{-as} ? $_ : { -row => [ $_ ] }), $args->{to}),
+ (map +($_->{-ident} || $_->{-as} ? $_ : ('(', $_, ')')), $args->{to}),
($args->{on} ? (
$self->format_keyword('on') ,
$args->{on},