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 => 'with', @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 };
79 my $expand_setop = sub {
80 my ($self, $setop, $args) = @_;
83 queries => [ map $self->expand_expr($_), @{$args->{queries}} ],
86 $self->expanders(map +($_ => $expand_setop), qw(union intersect except));
88 $self->clause_renderer('select.setop' => sub {
89 my ($self, $setop) = @_;
90 $self->render_aqt($setop);
93 foreach my $setop (qw(union intersect except)) {
94 $self->renderer($setop => sub {
95 my ($self, undef, $args) = @_;
97 ' '.$self->format_keyword(join '_', $setop, ($args->{type}||())).' ',
98 map [ $self->render_aqt($_) ], @{$args->{queries}}
102 $self->clause_expander("select.${setop}" => sub {
103 +(setop => $_[0]->expand_expr({
105 queries => (ref($_[1]) eq 'ARRAY' ? $_[1] : [ $_[1] ]),
109 $self->clause_expander("select.${setop}_all" => sub {
110 +(setop => $_[0]->expand_expr({
113 queries => (ref($_[1]) eq 'ARRAY' ? $_[1] : [ $_[1] ]),
118 $self->clause_expander('select.with' => my $with_expander = sub {
119 my ($self, $with) = @_;
120 if (ref($with) eq 'HASH') {
123 queries => [ map $self->expand_expr($_), @{$with->{queries}} ]
128 while (my ($name, $query) = splice @with, 0, 2) {
129 my @n = map $self->expand_expr($_, -ident),
130 ref($name) eq 'ARRAY' ? @$name : $name;
133 $self->expand_expr($query)
136 return +{ queries => \@exp };
138 $self->clause_expander('select.with_recursive' => sub {
139 my ($self, $with) = @_;
140 my $exp = $self->$with_expander($with);
146 $self->clause_renderer('select.with' => sub {
147 my ($self, $with) = @_;
148 my $q_part = [ $self->join_clauses(', ',
150 my ($alias, $query) = @$_;
151 [ $self->join_clauses(' ',
152 [ $self->_render_alias($alias) ],
153 [ $self->format_keyword('as') ],
154 [ $self->render_aqt($query) ],
156 } @{$with->{queries}}
158 return $self->join_clauses(' ',
159 [ $self->format_keyword(join '_', 'with', ($with->{type}||'')) ],
167 sub format_keyword { $_[0]->_sqlcase(join ' ', split '_', $_[1]) }
169 sub _expand_select_clause_from {
170 my ($self, $from) = @_;
171 +(from => $self->_expand_from_list(undef, $from));
174 sub _expand_from_list {
175 my ($self, undef, $args) = @_;
176 if (ref($args) eq 'HASH') {
177 return { -from_list => [ $self->expand_expr($args) ] };
180 my @args = ref($args) eq 'ARRAY' ? @$args : ($args);
181 while (my $entry = shift @args) {
182 if (!ref($entry) and $entry =~ /^-(.*)/) {
184 $list[-1] = $self->expand_expr({ -as => [
185 $list[-1], map +(ref($_) eq 'ARRAY' ? @$_ : $_), shift(@args)
189 $entry = { $entry => shift @args };
191 my $aqt = $self->expand_expr($entry, -ident);
192 if ($aqt->{-join} and not $aqt->{-join}{from}) {
193 $aqt->{-join}{from} = pop @list;
197 return { -from_list => \@list };
201 my ($self, undef, $args) = @_;
205 : (to => $args->[0], @{$args}[1..$#$args])
207 if (my $as = delete $proto{as}) {
208 $proto{to} = { -as => [ $proto{to}, ref($as) eq 'ARRAY' ? @$as : $as ] };
210 if (defined($proto{using}) and ref(my $using = $proto{using}) ne 'HASH') {
211 $proto{using} = { -row => [
212 map [ $self->expand_expr($_, -ident) ],
213 ref($using) eq 'ARRAY' ? @$using: $using
216 my %ret = map +($_ => $self->expand_expr($proto{$_}, -ident)),
218 return +{ -join => \%ret };
221 sub _render_from_list {
222 my ($self, undef, $list) = @_;
223 return $self->join_clauses(', ', map [ $self->render_aqt($_) ], @$list);
227 my ($self, undef, $args) = @_;
230 [ $self->render_aqt($args->{from}) ],
231 [ $self->format_keyword(join '_', ($args->{type}||()), 'join') ],
233 map +($_->{-ident} || $_->{-as} ? $_ : { -row => [ $_ ] }), $args->{to}
236 [ $self->format_keyword('on') ],
237 [ $self->render_aqt($args->{on}) ],
240 [ $self->format_keyword('using') ],
241 [ $self->render_aqt($args->{using}) ],
244 return $self->join_clauses(' ', @parts);
248 my ($self, undef, $vv, $k) = @_;
249 my @as = map $self->expand_expr($_, -ident),
250 (defined($k) ? ($k) : ()), ref($vv) eq 'ARRAY' ? @$vv : $vv;
251 return { -as => \@as };
255 my ($self, undef, $args) = @_;
256 my ($thing, @alias) = @$args;
257 return $self->join_clauses(
259 [ $self->render_aqt($thing) ],
260 [ $self->format_keyword('as') ],
261 [ $self->_render_alias(\@alias) ],
266 my ($self, $args) = @_;
267 my ($as, @cols) = @$args;
269 ? $self->join_clauses('',
270 [ $self->render_aqt($as) ],
272 [ $self->join_clauses(
274 map [ $self->render_aqt($_) ], @cols
278 : $self->render_aqt($as)
282 sub _expand_update_clause_target {
283 my ($self, $target) = @_;
284 +(target => $self->_expand_from_list(undef, $target));