1 package SQL::Abstract::ExtraClauses;
5 use if $] < '5.010', 'MRO::Compat';
7 use base qw(SQL::Abstract::Clauses);
9 BEGIN { *puke = \&SQL::Abstract::puke }
11 sub register_defaults {
13 $self->next::method(@_);
15 select => $self->clauses_of('select'), qw(group_by having)
17 $self->clause_expanders(
18 'select.group_by', sub {
19 $_[0]->_expand_maybe_list_expr($_[1], -ident)
21 'select.having', 'expand_expr',
23 foreach my $thing (qw(join from_list)) {
24 $self->expander($thing => "_expand_${thing}")
25 ->renderer($thing => "_render_${thing}")
27 $self->op_expander(as => '_expand_op_as');
28 $self->expander(as => '_expand_op_as');
29 $self->renderer(as => '_render_as');
31 $self->clauses_of(update => sub {
32 my ($self, @clauses) = @_;
33 splice(@clauses, 2, 0, 'from');
37 $self->clauses_of(delete => sub {
38 my ($self, @clauses) = @_;
39 splice(@clauses, 1, 0, 'using');
43 $self->clause_expanders(
44 'update.from' => '_expand_select_clause_from',
45 'delete.using' => sub {
46 +(using => $_[0]->_expand_from_list(undef, $_[1]));
48 'insert.rowvalues' => sub {
49 +(from => $_[0]->expand_expr({ -values => $_[1] }));
51 'insert.select' => sub {
52 +(from => $_[0]->expand_expr({ -select => $_[1] }));
56 $self->renderer(keyword => sub {
57 $_[0]->_sqlcase(join ' ', split '_', $_[1]);
62 sub _expand_select_clause_from {
63 my ($self, $from) = @_;
64 +(from => $self->_expand_from_list(undef, $from));
67 sub _expand_from_list {
68 my ($self, undef, $args) = @_;
69 if (ref($args) eq 'HASH') {
70 return { -from_list => [ $self->expand_expr($args) ] };
73 my @args = ref($args) eq 'ARRAY' ? @$args : ($args);
74 while (my $entry = shift @args) {
75 if (!ref($entry) and $entry =~ /^-(.*)/) {
77 $list[-1] = $self->expand_expr({ -as => [
78 $list[-1], map +(ref($_) eq 'ARRAY' ? @$_ : $_), shift(@args)
82 $entry = { $entry => shift @args };
84 my $aqt = $self->expand_expr($entry, -ident);
85 if ($aqt->{-join} and not $aqt->{-join}{from}) {
86 $aqt->{-join}{from} = pop @list;
90 return { -from_list => \@list };
94 my ($self, undef, $args) = @_;
98 : (to => $args->[0], @{$args}[1..$#$args])
100 if (my $as = delete $proto{as}) {
101 $proto{to} = { -as => [ $proto{to}, ref($as) eq 'ARRAY' ? @$as : $as ] };
103 if (defined($proto{using}) and ref(my $using = $proto{using}) ne 'HASH') {
104 $proto{using} = { -row => [
105 map [ $self->expand_expr($_, -ident) ],
106 ref($using) eq 'ARRAY' ? @$using: $using
109 my %ret = map +($_ => $self->expand_expr($proto{$_}, -ident)),
111 return +{ -join => \%ret };
114 sub _render_from_list {
115 my ($self, $list) = @_;
116 return $self->_join_parts(', ', map [ $self->render_aqt($_) ], @$list);
120 my ($self, $args) = @_;
123 [ $self->render_aqt($args->{from}) ],
125 { -keyword => join '_', ($args->{type}||()), 'join' }
128 map +($_->{-ident} || $_->{-as} ? $_ : { -row => [ $_ ] }), $args->{to}
131 [ $self->render_aqt({ -keyword => 'on' }) ],
132 [ $self->render_aqt($args->{on}) ],
135 [ $self->render_aqt({ -keyword => 'using' }) ],
136 [ $self->render_aqt($args->{using}) ],
139 return $self->_join_parts(' ', @parts);
143 my ($self, undef, $vv, $k) = @_;
144 my @as = map $self->expand_expr($_, -ident),
145 (defined($k) ? ($k) : ()), ref($vv) eq 'ARRAY' ? @$vv : $vv;
146 return { -as => \@as };
150 my ($self, $args) = @_;
151 my ($thing, $as, @cols) = @$args;
152 return $self->_join_parts(
154 [ $self->render_aqt($thing) ],
155 [ $self->render_aqt({ -keyword => 'as' }) ],
157 ? [ $self->_join_parts('',
158 [ $self->render_aqt($as) ],
160 [ $self->_join_parts(
162 map [ $self->render_aqt($_) ], @cols
166 : [ $self->render_aqt($as) ]