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 $self->renderer(as => '_render_as');
31 splice(@{$self->{clauses_of}{update}}, 2, 0, 'from');
32 splice(@{$self->{clauses_of}{delete}}, 1, 0, 'using');
33 $self->clause_expanders(
34 'update.from' => '_expand_select_clause_from',
35 'delete.using' => sub {
36 +(using => $_[0]->_expand_from_list(undef, $_[1]));
38 'insert.rowvalues' => sub {
39 +(from => $_[0]->expand_expr({ -values => $_[1] }));
41 'insert.select' => sub {
42 +(from => $_[0]->expand_expr({ -select => $_[1] }));
48 sub _expand_select_clause_from {
49 my ($self, $from) = @_;
50 +(from => $self->_expand_from_list(undef, $from));
53 sub _expand_from_list {
54 my ($self, undef, $args) = @_;
55 if (ref($args) eq 'HASH') {
56 return { -from_list => [ $self->expand_expr($args) ] };
59 my @args = ref($args) eq 'ARRAY' ? @$args : ($args);
60 while (my $entry = shift @args) {
61 if (!ref($entry) and $entry =~ /^-(.*)/) {
63 $list[-1] = $self->expand_expr({ -as => [
64 $list[-1], map +(ref($_) eq 'ARRAY' ? @$_ : $_), shift(@args)
68 $entry = { $entry => shift @args };
70 my $aqt = $self->expand_expr($entry, -ident);
71 if ($aqt->{-join} and not $aqt->{-join}{from}) {
72 $aqt->{-join}{from} = pop @list;
76 return { -from_list => \@list };
80 my ($self, undef, $args) = @_;
84 : (to => $args->[0], @{$args}[1..$#$args])
86 if (my $as = delete $proto{as}) {
87 $proto{to} = { -as => [ $proto{to}, ref($as) eq 'ARRAY' ? @$as : $as ] };
89 if (defined($proto{using}) and ref(my $using = $proto{using}) ne 'HASH') {
90 $proto{using} = { -row => [
91 map [ $self->expand_expr($_, -ident) ],
92 ref($using) eq 'ARRAY' ? @$using: $using
95 my %ret = map +($_ => $self->expand_expr($proto{$_}, -ident)),
97 return +{ -join => \%ret };
100 sub _render_from_list {
101 my ($self, $list) = @_;
102 return $self->_join_parts(', ', map [ $self->render_aqt($_) ], @$list);
106 my ($self, $args) = @_;
109 [ $self->render_aqt($args->{from}) ],
112 ? join(' ', split '_', $args->{type}).' '
119 map +($_->{-ident} || $_->{-as} ? $_ : { -row => [ $_ ] }), $args->{to}
122 [ $self->_sqlcase('on') ],
123 [ $self->render_aqt($args->{on}) ],
126 [ $self->_sqlcase('using') ],
127 [ $self->render_aqt($args->{using}) ],
130 return $self->_join_parts(' ', @parts);
134 my ($self, undef, $vv, $k) = @_;
135 my @as = map $self->expand_expr($_, -ident),
136 (defined($k) ? ($k) : ()), ref($vv) eq 'ARRAY' ? @$vv : $vv;
137 return { -as => \@as };
141 my ($self, $args) = @_;
142 my ($thing, $as, @cols) = @$args;
143 return $self->_join_parts(
145 [ $self->render_aqt($thing) ],
146 [ $self->_sqlcase('as') ],
148 ? [ $self->_join_parts('',
149 [ $self->render_aqt($as) ],
151 [ $self->_join_parts(
153 map [ $self->render_aqt($_) ], @cols
157 : [ $self->render_aqt($as) ]