1 package SQL::Abstract::Clauses;
5 use if $] < '5.010', 'MRO::Compat';
7 use base 'SQL::Abstract';
9 BEGIN { *puke = \&SQL::Abstract::puke }
12 shift->next::method(@_)->register_defaults
15 sub register_defaults {
17 $self->{clauses_of}{select} = [ qw(select from where order_by) ];
18 $self->{expand}{select} = sub { shift->_expand_statement(@_) };
19 $self->{render}{select} = sub { shift->_render_statement(@_) };
20 $self->{expand_clause}{"select.$_"} = "_expand_select_clause_$_"
21 for @{$self->{clauses_of}{select}};
22 $self->{clauses_of}{update} = [ qw(target set where returning) ];
23 $self->{expand}{update} = sub { shift->_expand_statement(@_) };
24 $self->{render}{update} = sub { shift->_render_statement(@_) };
25 $self->{expand_clause}{"update.$_"} = "_expand_update_clause_$_"
26 for @{$self->{clauses_of}{update}};
27 $self->{expand_clause}{'update.update'} = '_expand_update_clause_target';
28 $self->{render_clause}{'update.target'} = sub {
29 my ($self, $target) = @_;
30 my ($sql, @bind) = $self->render_aqt($target);
31 ($self->_sqlcase('update ').$sql, @bind);
33 $self->{clauses_of}{delete} = [ qw(target where returning) ];
34 $self->{expand}{delete} = sub { shift->_expand_statement(@_) };
35 $self->{render}{delete} = sub { shift->_render_statement(@_) };
36 $self->{expand_clause}{"delete.$_"} = "_expand_delete_clause_$_"
37 for @{$self->{clauses_of}{delete}};
38 $self->{expand_clause}{"delete.from"} = '_expand_delete_clause_target';
39 $self->{render_clause}{'delete.target'} = sub {
40 my ($self, $from) = @_;
41 my ($sql, @bind) = $self->render_aqt($from);
42 ($self->_sqlcase('delete from ').$sql, @bind);
44 $self->{clauses_of}{insert} = [
45 'target', 'fields', 'from', 'returning'
47 $self->{expand}{insert} = sub { shift->_expand_statement(@_) };
48 $self->{render}{insert} = sub { shift->_render_statement(@_) };
49 $self->{expand_clause}{'insert.into'} = '_expand_insert_clause_target';
50 $self->{expand_clause}{'insert.target'} = '_expand_insert_clause_target';
51 $self->{expand_clause}{'insert.fields'} = sub {
53 shift->_expand_maybe_list_expr(@_, -ident)
54 ] } if ref($_[1]) eq 'ARRAY';
55 return $_[1]; # should maybe still expand somewhat?
57 $self->{expand_clause}{'insert.values'} = '_expand_insert_clause_values';
58 $self->{expand_clause}{'insert.returning'} = sub {
59 shift->_expand_maybe_list_expr(@_, -ident);
61 $self->{render_clause}{'insert.fields'} = sub {
62 return $_[0]->render_aqt($_[1]);
64 $self->{render_clause}{'insert.target'} = sub {
65 my ($self, $from) = @_;
66 my ($sql, @bind) = $self->render_aqt($from);
67 ($self->_sqlcase('insert into ').$sql, @bind);
69 $self->{render_clause}{'insert.from'} = sub {
70 return $_[0]->render_aqt($_[1], 1);
72 $self->{expand}{values} = '_expand_values';
73 $self->{render}{values} = '_render_values';
74 $self->{expand}{exists} = sub {
75 $_[0]->_expand_op(undef, [ exists => $_[2] ]);
80 sub _expand_select_clause_select {
81 my ($self, $select) = @_;
82 +(select => $self->_expand_maybe_list_expr($select, -ident));
85 sub _expand_select_clause_from {
86 my ($self, $from) = @_;
87 +(from => $self->_expand_maybe_list_expr($from, -ident));
90 sub _expand_select_clause_where {
91 my ($self, $where) = @_;
92 +(where => $self->expand_expr($where));
95 sub _expand_select_clause_order_by {
96 my ($self, $order_by) = @_;
97 +(order_by => $self->_expand_order_by($order_by));
100 sub _expand_update_clause_target {
101 my ($self, $target) = @_;
102 +(target => $self->_expand_maybe_list_expr($target, -ident));
105 sub _expand_update_clause_set {
106 return $_[1] if ref($_[1]) eq 'HASH' and ($_[1]->{-op}||[''])->[0] eq ',';
107 +(set => shift->_expand_update_set_values(@_));
110 sub _expand_update_clause_where {
111 +(where => shift->expand_expr(@_));
114 sub _expand_update_clause_returning {
115 +(returning => shift->_expand_maybe_list_expr(@_, -ident));
118 sub _expand_delete_clause_target {
119 +(target => shift->_expand_maybe_list_expr(@_, -ident));
122 sub _expand_delete_clause_where { +(where => shift->expand_expr(@_)); }
124 sub _expand_delete_clause_returning {
125 +(returning => shift->_expand_maybe_list_expr(@_, -ident));
128 sub _expand_statement {
129 my ($self, $type, $args) = @_;
130 my $ec = $self->{expand_clause};
133 $args->{$type} = delete $args->{_}
135 return +{ "-${type}" => +{
137 my $val = $args->{$_};
138 if (defined($val) and my $exp = $ec->{"${type}.$_"}) {
139 if ((my (@exp) = $self->$exp($val)) == 1) {
145 ($_ => $self->expand_expr($val))
151 sub _render_statement {
152 my ($self, $type, $args) = @_;
154 foreach my $clause (@{$self->{clauses_of}{$type}}) {
155 next unless my $clause_expr = $args->{$clause};
156 local $self->{convert_where} = $self->{convert} if $clause eq 'where';
157 my ($sql) = my @part = do {
158 if (my $rdr = $self->{render_clause}{"${type}.${clause}"}) {
159 $self->$rdr($clause_expr);
161 my ($clause_sql, @bind) = $self->render_aqt($clause_expr, 1);
163 $self->_sqlcase(join ' ', split '_', $clause),
168 next unless defined($sql) and length($sql);
171 my ($sql, @bind) = $self->join_clauses(' ', @parts);
173 (our $Render_Top_Level ? $sql : '('.$sql.')'),
179 my ($self, $aqt, $top_level) = @_;
180 local our $Render_Top_Level = $top_level;
181 return $self->next::method($aqt);
184 sub render_statement {
185 my ($self, $expr, $default_scalar_to) = @_;
186 my ($sql, @bind) = $self->render_aqt(
187 $self->expand_expr($expr, $default_scalar_to), 1
189 return (wantarray ? ($sql, @bind) : $sql);
193 my ($self, @args) = @_;
195 return $self->render_statement({ -select => $_[1] }) if ref($_[1]) eq 'HASH';
198 @clauses{qw(from select where order_by)} = @args;
200 # This oddity is to literalify since historically SQLA doesn't quote
201 # a single identifier argument, so we convert it into a literal
203 $clauses{select} = { -literal => [ $clauses{select}||'*' ] }
204 unless ref($clauses{select});
206 return $self->render_statement({ -select => \%clauses });
210 my ($self, $table, $set, $where, $options) = @_;
212 return $self->render_statement({ -update => $_[1] }) if ref($_[1]) eq 'HASH';
215 @clauses{qw(target set where)} = ($table, $set, $where);
216 puke "Unsupported data type specified to \$sql->update"
217 unless ref($clauses{set}) eq 'HASH';
218 @clauses{keys %$options} = values %$options;
219 return $self->render_statement({ -update => \%clauses });
223 my ($self, $table, $where, $options) = @_;
225 return $self->render_statement({ -delete => $_[1] }) if ref($_[1]) eq 'HASH';
227 my %clauses = (target => $table, where => $where, %{$options||{}});
228 return $self->render_statement({ -delete => \%clauses });
232 my ($self, $table, $data, $options) = @_;
234 return $self->render_statement({ -insert => $_[1] }) if ref($_[1]) eq 'HASH';
236 my %clauses = (target => $table, values => $data, %{$options||{}});
237 return $self->render_statement({ -insert => \%clauses });
240 sub _expand_insert_clause_target {
241 +(target => shift->_expand_maybe_list_expr(@_, -ident));
244 sub _expand_insert_clause_values {
245 my ($self, $data) = @_;
246 if (ref($data) eq 'HASH' and (keys(%$data))[0] =~ /^-/) {
247 return $self->expand_expr($data);
249 return $data if ref($data) eq 'HASH' and $data->{-row};
250 my ($f_aqt, $v_aqt) = $self->_expand_insert_values($data);
251 return (from => { -values => $v_aqt }, ($f_aqt ? (fields => $f_aqt) : ()));
255 my ($self, undef, $values) = @_;
256 return { -values => [
259 ? $self->expand_expr($_)
260 : +{ -row => [ map $self->expand_expr($_), @$_ ] }
261 ), ref($values) eq 'ARRAY' ? @$values : $values
266 my ($self, undef, $values) = @_;
267 my ($v_sql, @bind) = $self->join_clauses(
269 map [ $self->render_aqt($_) ],
270 ref($values) eq 'ARRAY' ? @$values : $values
272 my $sql = $self->_sqlcase('values').' '.$v_sql;
274 (our $Render_Top_Level ? $sql : '('.$sql.')'),
280 my ($self, $name, $key, $value) = @_;
281 return $self->{$name}{$key} unless @_ > 3;
282 $self->{$name}{$key} = $value;
287 foreach my $type (qw(
288 expand op_expand render op_render clause_expand clause_render
290 my $key = join '_', reverse split '_', $type;
291 my $singular = "${type}er";
292 eval qq{sub ${singular} { shift->_ext_rw($key => \@_) }; 1 }
293 or die "Method builder failed for ${type}er: $@";
294 eval qq{sub ${singular}s {
295 my (\$self, \@args) = \@_;
296 while (my (\$this_key, \$this_value) = splice(\@args, 0, 2)) {
297 \$self->{${key}}{\$this_key} = \$this_value;
300 }; 1 } or die "Method builder failed for ${singular}s: $@";
305 my ($self, $of, @clauses) = @_;
307 return @{$self->{clauses_of}{$of}||[]};
309 if (ref($clauses[0]) eq 'CODE') {
310 @clauses = $self->${\($clauses[0])}(@{$self->{clauses_of}{$of}||[]});
312 $self->{clauses_of}{$of} = \@clauses;
321 ref($self->{$_}) eq 'HASH'