1 package SQL::Abstract::ExtraClauses;
6 is => 'ro', init_arg => undef,
8 expand_expr expand_maybe_list_expr render_aqt
9 format_keyword join_query_parts
13 BEGIN { *puke = \&SQL::Abstract::puke }
16 my ($self, $method) = @_;
17 return sub { local $self->{sqla} = shift; $self->$method(@_) };
21 my ($self, $sqla) = @_;
22 $self = $self->new unless ref($self);
23 my @clauses = $sqla->clauses_of('select');
25 CLAUSE: foreach my $idx (0..$#clauses) {
26 if ($clauses[$idx] eq 'order_by') {
27 @before_setop = @clauses[0..$idx-1];
28 splice(@clauses, $idx, 0, qw(setop group_by having));
32 die "Huh?" unless @before_setop;
33 $sqla->clauses_of(select => 'with', @clauses);
34 $sqla->clause_expanders(
35 'select.group_by', $self->cb(sub {
36 $_[0]->expand_maybe_list_expr($_[2], -ident)
38 'select.having', $self->cb(sub { $_[0]->expand_expr($_[2]) }),
40 foreach my $thing (qw(join from_list)) {
41 $sqla->expander($thing => $self->cb("_expand_${thing}"))
42 ->renderer($thing => $self->cb("_render_${thing}"))
44 $sqla->op_expander(as => $self->cb('_expand_op_as'));
45 $sqla->expander(as => $self->cb('_expand_op_as'));
46 $sqla->renderer(as => $self->cb('_render_as'));
47 $sqla->expander(alias => $self->cb('_expand_alias'));
48 $sqla->renderer(alias => $self->cb('_render_alias'));
50 $sqla->clauses_of(update => sub {
51 my ($self, @clauses) = @_;
52 splice(@clauses, 2, 0, 'from');
56 $sqla->clauses_of(delete => sub {
57 my ($self, @clauses) = @_;
58 splice(@clauses, 1, 0, 'using');
62 $sqla->clause_expanders(
63 'update.from' => $self->cb('_expand_select_clause_from'),
64 'delete.using' => $self->cb(sub {
65 +(using => $_[0]->_expand_from_list(undef, $_[2]));
67 'insert.rowvalues' => $self->cb(sub {
68 +(from => $_[0]->expand_expr({ -values => $_[2] }));
70 'insert.select' => $self->cb(sub {
71 +(from => $_[0]->expand_expr({ -select => $_[2] }));
76 $sqla->wrap_expander(select => sub {
80 my $exp = $self->sqla->$orig(@_);
81 return $exp unless my $setop = (my $sel = $exp->{-select})->{setop};
82 if (my @keys = grep $sel->{$_}, @before_setop) {
83 my %inner; @inner{@keys} = delete @{$sel}{@keys};
84 unshift @{(values(%$setop))[0]{queries}},
85 { -select => \%inner };
90 my $expand_setop = $self->cb(sub {
91 my ($self, $setop, $args) = @_;
94 queries => [ map $self->expand_expr($_), @{$args->{queries}} ],
97 $sqla->expanders(map +($_ => $expand_setop), qw(union intersect except));
99 $sqla->clause_renderer('select.setop' => $self->cb(sub {
100 my ($self, undef, $setop) = @_;
101 $self->render_aqt($setop);
104 $sqla->renderer($_ => $self->cb(sub {
105 my ($self, $setop, $args) = @_;
106 $self->join_query_parts(
107 ' '.$self->format_keyword(join '_', $setop, ($args->{type}||())).' ',
110 })) for qw(union intersect except);
112 my $setop_expander = $self->cb(sub {
113 my ($self, $setop, $args) = @_;
114 my ($op, $type) = split '_', $setop;
115 +(setop => $self->expand_expr({
117 ($type ? (type => $type) : ()),
118 queries => (ref($args) eq 'ARRAY' ? $args : [ $args ])
123 $sqla->clause_expanders(
124 map +($_ => $setop_expander),
126 map +($_, "${_}_all", "${_}_distinct"),
127 qw(union intersect except)
130 my $w_exp = $self->cb('_expand_with');
131 my $w_rdr = $self->cb('_render_with');
132 $sqla->clause_expander('select.with' => $w_exp);
133 $sqla->clause_expander('select.with_recursive' => $w_exp);
134 $sqla->clause_renderer('select.with' => $w_rdr);
136 foreach my $stmt (qw(insert update delete)) {
137 $sqla->clauses_of($stmt => 'with', $sqla->clauses_of($stmt));
138 $sqla->clause_expander("${stmt}.$_" => $w_exp)
139 for qw(with with_recursive);
140 $sqla->clause_renderer("${stmt}.with" => $w_rdr);
143 $sqla->expander(cast => $self->cb('_expand_cast'));
145 $sqla->clause_expanders(
146 "select.from", $self->cb('_expand_select_clause_from'),
147 "update.target", $self->cb('_expand_update_clause_target'),
148 "update.update", $self->cb('_expand_update_clause_target'),
154 sub _expand_select_clause_from {
155 my ($self, undef, $from) = @_;
156 +(from => $self->_expand_from_list(undef, $from));
159 sub _expand_from_list {
160 my ($self, undef, $args) = @_;
161 if (ref($args) eq 'HASH') {
162 return $args if $args->{-from_list};
163 return { -from_list => [ $self->expand_expr($args) ] };
166 my @args = ref($args) eq 'ARRAY' ? @$args : ($args);
167 while (my $entry = shift @args) {
168 if (!ref($entry) and $entry =~ /^-(.*)/) {
170 $list[-1] = $self->expand_expr({ -as => [
171 $list[-1], map +(ref($_) eq 'ARRAY' ? @$_ : $_), shift(@args)
175 $entry = { $entry => shift @args };
177 my $aqt = $self->expand_expr($entry, -ident);
178 if ($aqt->{-join} and not $aqt->{-join}{from}) {
179 $aqt->{-join}{from} = pop @list;
183 return { -from_list => \@list };
187 my ($self, undef, $args) = @_;
191 : (to => $args->[0], @{$args}[1..$#$args])
193 if (my $as = delete $proto{as}) {
194 $proto{to} = $self->expand_expr({ -as => [ $proto{to}, $as ] });
196 if (defined($proto{using}) and ref(my $using = $proto{using}) ne 'HASH') {
198 map [ $self->expand_expr($_, -ident) ],
199 ref($using) eq 'ARRAY' ? @$using: $using
202 my %ret = map +($_ => $self->expand_expr($proto{$_}, -ident)),
204 return +{ -join => \%ret };
207 sub _render_from_list {
208 my ($self, undef, $list) = @_;
209 return $self->join_query_parts(', ', @$list);
213 my ($self, undef, $args) = @_;
217 $self->format_keyword(join '_', ($args->{type}||()), 'join'),
218 (map +($_->{-ident} || $_->{-as} ? $_ : ('(', $_, ')')), $args->{to}),
220 $self->format_keyword('on') ,
224 $self->format_keyword('using'),
225 '(', $args->{using}, ')',
228 return $self->join_query_parts(' ', @parts);
232 my ($self, undef, $vv, $k) = @_;
233 my @vv = (ref($vv) eq 'ARRAY' ? @$vv : $vv);
235 my $ik = $self->expand_expr($k, -ident);
236 return +{ -as => [ $ik, $self->expand_expr($vv[0], -alias) ] }
237 if @vv == 1 and ref($vv[0]) eq 'HASH';
239 my @as = map $self->expand_expr($_, -ident), @vv;
240 return { -as => [ $ik, { -alias => \@as } ] };
244 my ($self, undef, $args) = @_;
245 my ($thing, $alias) = @$args;
246 return $self->join_query_parts(
249 $self->format_keyword('as'),
255 my ($self, undef, $args) = @_;
256 my ($as, @cols) = @$args;
258 ? $self->join_query_parts('',
261 $self->join_query_parts(
267 : $self->render_aqt($as)
271 sub _expand_update_clause_target {
272 my ($self, undef, $target) = @_;
273 +(target => $self->_expand_from_list(undef, $target));
277 my ($self, undef, $thing) = @_;
278 return { -func => [ cast => $thing ] } if ref($thing) eq 'HASH';
279 my ($cast, $to) = @{$thing};
280 +{ -func => [ cast => { -as => [
281 $self->expand_expr($cast),
282 $self->expand_expr($to, -ident),
287 my ($self, undef, $args) = @_;
288 if (ref($args) eq 'HASH' and my $alias = $args->{-alias}) {
292 map $self->expand_expr($_, -ident),
293 ref($args) eq 'ARRAY' ? @{$args} : $args
299 my ($self, $name, $with) = @_;
300 my (undef, $type) = split '_', $name;
301 if (ref($with) eq 'HASH') {
306 $self->expand_expr({ -alias => $_->[0] }, -ident),
307 $self->expand_expr($_->[1]),
308 ], @{$with->{queries}}
314 while (my ($alias, $query) = splice @with, 0, 2) {
316 $self->expand_expr({ -alias => $alias }, -ident),
317 $self->expand_expr($query)
320 return +(with => { ($type ? (type => $type) : ()), queries => \@exp });
324 my ($self, undef, $with) = @_;
325 my $q_part = $self->join_query_parts(', ',
327 my ($alias, $query) = @$_;
328 $self->join_query_parts(' ',
330 $self->format_keyword('as'),
333 } @{$with->{queries}}
335 return $self->join_query_parts(' ',
336 $self->format_keyword(join '_', 'with', ($with->{type}||'')),