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(select => @_) };
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(update => @_) };
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(delete => @_) };
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(insert => @_) };
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]);
75 sub _expand_select_clause_select {
76 my ($self, $select) = @_;
77 +(select => $self->_expand_maybe_list_expr($select, -ident));
80 sub _expand_select_clause_from {
81 my ($self, $from) = @_;
82 +(from => $self->_expand_maybe_list_expr($from, -ident));
85 sub _expand_select_clause_where {
86 my ($self, $where) = @_;
87 +(where => $self->expand_expr($where));
90 sub _expand_select_clause_order_by {
91 my ($self, $order_by) = @_;
92 +(order_by => $self->_expand_order_by($order_by));
95 sub _expand_update_clause_target {
96 my ($self, $target) = @_;
97 +(target => $self->_expand_maybe_list_expr($target, -ident));
100 sub _expand_update_clause_set {
101 return $_[1] if ref($_[1]) eq 'HASH' and ($_[1]->{-op}||[''])->[0] eq ',';
102 +(set => shift->_expand_update_set_values(@_));
105 sub _expand_update_clause_where {
106 +(where => shift->expand_expr(@_));
109 sub _expand_update_clause_returning {
110 +(returning => shift->_expand_maybe_list_expr(@_, -ident));
113 sub _expand_delete_clause_target {
114 +(target => shift->_expand_maybe_list_expr(@_, -ident));
117 sub _expand_delete_clause_where { +(where => shift->expand_expr(@_)); }
119 sub _expand_delete_clause_returning {
120 +(returning => shift->_expand_maybe_list_expr(@_, -ident));
123 sub _expand_statement {
124 my ($self, $type, $args) = @_;
125 my $ec = $self->{expand_clause};
126 return +{ "-${type}" => +{
128 my $val = $args->{$_};
129 if (defined($val) and my $exp = $ec->{"${type}.$_"}) {
130 if ((my (@exp) = $self->$exp($val)) == 1) {
136 ($_ => $self->expand_expr($val))
142 sub _render_statement {
143 my ($self, $type, $args) = @_;
145 foreach my $clause (@{$self->{clauses_of}{$type}}) {
146 next unless my $clause_expr = $args->{$clause};
147 local $self->{convert_where} = $self->{convert} if $clause eq 'where';
148 my ($sql) = my @part = do {
149 if (my $rdr = $self->{render_clause}{"${type}.${clause}"}) {
150 $self->$rdr($clause_expr);
152 my ($clause_sql, @bind) = $self->render_aqt($clause_expr);
154 $self->_sqlcase(join ' ', split '_', $clause),
159 next unless defined($sql) and length($sql);
162 return $self->_join_parts(' ', @parts);
166 my ($self, @args) = @_;
168 return $self->render_expr({ -select => $_[1] }) if ref($_[1]) eq 'HASH';
171 @clauses{qw(from select where order_by)} = @args;
173 # This oddity is to literalify since historically SQLA doesn't quote
174 # a single identifier argument, so we convert it into a literal
176 $clauses{select} = { -literal => [ $clauses{select}||'*' ] }
177 unless ref($clauses{select});
179 return $self->render_expr({ -select => \%clauses });
183 my ($self, $table, $set, $where, $options) = @_;
185 return $self->render_expr({ -update => $_[1] }) if ref($_[1]) eq 'HASH';
188 @clauses{qw(target set where)} = ($table, $set, $where);
189 puke "Unsupported data type specified to \$sql->update"
190 unless ref($clauses{set}) eq 'HASH';
191 @clauses{keys %$options} = values %$options;
192 return $self->render_expr({ -update => \%clauses });
196 my ($self, $table, $where, $options) = @_;
198 return $self->render_expr({ -delete => $_[1] }) if ref($_[1]) eq 'HASH';
200 my %clauses = (target => $table, where => $where, %{$options||{}});
201 return $self->render_expr({ -delete => \%clauses });
205 my ($self, $table, $data, $options) = @_;
207 return $self->render_expr({ -insert => $_[1] }) if ref($_[1]) eq 'HASH';
209 my %clauses = (target => $table, values => $data, %{$options||{}});
210 return $self->render_expr({ -insert => \%clauses });
213 sub _expand_insert_clause_target {
214 +(target => shift->_expand_maybe_list_expr(@_, -ident));
217 sub _expand_insert_clause_values {
218 my ($self, $data) = @_;
219 if (ref($data) eq 'HASH' and (keys(%$data))[0] =~ /^-/) {
220 return $self->expand_expr($data);
222 return $data if ref($data) eq 'HASH' and $data->{-row};
223 my ($f_aqt, $v_aqt) = $self->_expand_insert_values($data);
224 return (from => { -values => $v_aqt }, ($f_aqt ? (fields => $f_aqt) : ()));