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 };
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, $args) = @_;
97 ' '.$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] ]),
122 sub format_keyword { $_[0]->_sqlcase(join ' ', split '_', $_[1]) }
124 sub _expand_select_clause_from {
125 my ($self, $from) = @_;
126 +(from => $self->_expand_from_list(undef, $from));
129 sub _expand_from_list {
130 my ($self, undef, $args) = @_;
131 if (ref($args) eq 'HASH') {
132 return { -from_list => [ $self->expand_expr($args) ] };
135 my @args = ref($args) eq 'ARRAY' ? @$args : ($args);
136 while (my $entry = shift @args) {
137 if (!ref($entry) and $entry =~ /^-(.*)/) {
139 $list[-1] = $self->expand_expr({ -as => [
140 $list[-1], map +(ref($_) eq 'ARRAY' ? @$_ : $_), shift(@args)
144 $entry = { $entry => shift @args };
146 my $aqt = $self->expand_expr($entry, -ident);
147 if ($aqt->{-join} and not $aqt->{-join}{from}) {
148 $aqt->{-join}{from} = pop @list;
152 return { -from_list => \@list };
156 my ($self, undef, $args) = @_;
160 : (to => $args->[0], @{$args}[1..$#$args])
162 if (my $as = delete $proto{as}) {
163 $proto{to} = { -as => [ $proto{to}, ref($as) eq 'ARRAY' ? @$as : $as ] };
165 if (defined($proto{using}) and ref(my $using = $proto{using}) ne 'HASH') {
166 $proto{using} = { -row => [
167 map [ $self->expand_expr($_, -ident) ],
168 ref($using) eq 'ARRAY' ? @$using: $using
171 my %ret = map +($_ => $self->expand_expr($proto{$_}, -ident)),
173 return +{ -join => \%ret };
176 sub _render_from_list {
177 my ($self, $list) = @_;
178 return $self->join_clauses(', ', map [ $self->render_aqt($_) ], @$list);
182 my ($self, $args) = @_;
185 [ $self->render_aqt($args->{from}) ],
186 [ $self->format_keyword(join '_', ($args->{type}||()), 'join') ],
188 map +($_->{-ident} || $_->{-as} ? $_ : { -row => [ $_ ] }), $args->{to}
191 [ $self->format_keyword('on') ],
192 [ $self->render_aqt($args->{on}) ],
195 [ $self->format_keyword('using') ],
196 [ $self->render_aqt($args->{using}) ],
199 return $self->join_clauses(' ', @parts);
203 my ($self, undef, $vv, $k) = @_;
204 my @as = map $self->expand_expr($_, -ident),
205 (defined($k) ? ($k) : ()), ref($vv) eq 'ARRAY' ? @$vv : $vv;
206 return { -as => \@as };
210 my ($self, $args) = @_;
211 my ($thing, $as, @cols) = @$args;
212 return $self->join_clauses(
214 [ $self->render_aqt($thing) ],
215 [ $self->format_keyword('as') ],
217 ? [ $self->join_clauses('',
218 [ $self->render_aqt($as) ],
220 [ $self->join_clauses(
222 map [ $self->render_aqt($_) ], @cols
226 : [ $self->render_aqt($as) ]