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(@_);
14 my @clauses = $self->clauses_of('select');
16 CLAUSE: foreach my $idx (0..$#clauses) {
17 if ($clauses[$idx] eq 'order_by') {
18 @before_setop = @clauses[0..$idx-1];
19 splice(@clauses, $idx, 0, qw(setop group_by having));
23 die "Huh?" unless @before_setop;
24 $self->clauses_of(select => @clauses);
25 $self->clause_expanders(
26 'select.group_by', sub {
27 $_[0]->_expand_maybe_list_expr($_[1], -ident)
29 'select.having', 'expand_expr',
31 foreach my $thing (qw(join from_list)) {
32 $self->expander($thing => "_expand_${thing}")
33 ->renderer($thing => "_render_${thing}")
35 $self->op_expander(as => '_expand_op_as');
36 $self->expander(as => '_expand_op_as');
37 $self->renderer(as => '_render_as');
39 $self->clauses_of(update => sub {
40 my ($self, @clauses) = @_;
41 splice(@clauses, 2, 0, 'from');
45 $self->clauses_of(delete => sub {
46 my ($self, @clauses) = @_;
47 splice(@clauses, 1, 0, 'using');
51 $self->clause_expanders(
52 'update.from' => '_expand_select_clause_from',
53 'delete.using' => sub {
54 +(using => $_[0]->_expand_from_list(undef, $_[1]));
56 'insert.rowvalues' => sub {
57 +(from => $_[0]->expand_expr({ -values => $_[1] }));
59 'insert.select' => sub {
60 +(from => $_[0]->expand_expr({ -select => $_[1] }));
66 my $orig = $self->expander('select');
67 $self->expander(select => sub {
69 my $exp = $self->$orig(@_);
70 return $exp unless my $setop = (my $sel = $exp->{-select})->{setop};
71 if (my @keys = grep $sel->{$_}, @before_setop) {
72 my %inner; @inner{@keys} = delete @{$sel}{@keys};
73 unshift @{(values(%$setop))[0]{queries}},
74 { -select => \%inner };
80 $self->clause_expander('select.union' => sub {
81 +(setop => $_[0]->expand_expr({
83 queries => (ref($_[1]) eq 'ARRAY' ? $_[1] : [ $_[1] ]),
87 $self->clause_expander('select.union_all' => sub {
88 +(setop => $_[0]->expand_expr({
91 queries => (ref($_[1]) eq 'ARRAY' ? $_[1] : [ $_[1] ]),
95 $self->expander(union => sub {
96 my ($self, undef, $args) = @_;
99 queries => [ map $self->expand_expr($_), @{$args->{queries}} ],
103 $self->clause_renderer('select.setop' => sub {
104 my ($self, $setop) = @_;
105 $self->render_aqt($setop);
108 $self->renderer(union => sub {
109 my ($self, $args) = @_;
111 ' '.$self->format_keyword(join '_', 'union', ($args->{type}||())).' ',
112 map [ $self->render_aqt($_) ], @{$args->{queries}}
119 sub format_keyword { $_[0]->_sqlcase(join ' ', split '_', $_[1]) }
121 sub _expand_select_clause_from {
122 my ($self, $from) = @_;
123 +(from => $self->_expand_from_list(undef, $from));
126 sub _expand_from_list {
127 my ($self, undef, $args) = @_;
128 if (ref($args) eq 'HASH') {
129 return { -from_list => [ $self->expand_expr($args) ] };
132 my @args = ref($args) eq 'ARRAY' ? @$args : ($args);
133 while (my $entry = shift @args) {
134 if (!ref($entry) and $entry =~ /^-(.*)/) {
136 $list[-1] = $self->expand_expr({ -as => [
137 $list[-1], map +(ref($_) eq 'ARRAY' ? @$_ : $_), shift(@args)
141 $entry = { $entry => shift @args };
143 my $aqt = $self->expand_expr($entry, -ident);
144 if ($aqt->{-join} and not $aqt->{-join}{from}) {
145 $aqt->{-join}{from} = pop @list;
149 return { -from_list => \@list };
153 my ($self, undef, $args) = @_;
157 : (to => $args->[0], @{$args}[1..$#$args])
159 if (my $as = delete $proto{as}) {
160 $proto{to} = { -as => [ $proto{to}, ref($as) eq 'ARRAY' ? @$as : $as ] };
162 if (defined($proto{using}) and ref(my $using = $proto{using}) ne 'HASH') {
163 $proto{using} = { -row => [
164 map [ $self->expand_expr($_, -ident) ],
165 ref($using) eq 'ARRAY' ? @$using: $using
168 my %ret = map +($_ => $self->expand_expr($proto{$_}, -ident)),
170 return +{ -join => \%ret };
173 sub _render_from_list {
174 my ($self, $list) = @_;
175 return $self->join_clauses(', ', map [ $self->render_aqt($_) ], @$list);
179 my ($self, $args) = @_;
182 [ $self->render_aqt($args->{from}) ],
183 [ $self->format_keyword(join '_', ($args->{type}||()), 'join') ],
185 map +($_->{-ident} || $_->{-as} ? $_ : { -row => [ $_ ] }), $args->{to}
188 [ $self->format_keyword('on') ],
189 [ $self->render_aqt($args->{on}) ],
192 [ $self->format_keyword('using') ],
193 [ $self->render_aqt($args->{using}) ],
196 return $self->join_clauses(' ', @parts);
200 my ($self, undef, $vv, $k) = @_;
201 my @as = map $self->expand_expr($_, -ident),
202 (defined($k) ? ($k) : ()), ref($vv) eq 'ARRAY' ? @$vv : $vv;
203 return { -as => \@as };
207 my ($self, $args) = @_;
208 my ($thing, $as, @cols) = @$args;
209 return $self->join_clauses(
211 [ $self->render_aqt($thing) ],
212 [ $self->format_keyword('as') ],
214 ? [ $self->join_clauses('',
215 [ $self->render_aqt($as) ],
217 [ $self->join_clauses(
219 map [ $self->render_aqt($_) ], @cols
223 : [ $self->render_aqt($as) ]