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', 'values', '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);
72 sub _expand_select_clause_select {
73 my ($self, $select) = @_;
74 +(select => $self->_expand_maybe_list_expr($select, -ident));
77 sub _expand_select_clause_from {
78 my ($self, $from) = @_;
79 +(from => $self->_expand_maybe_list_expr($from, -ident));
82 sub _expand_select_clause_where {
83 my ($self, $where) = @_;
84 +(where => $self->expand_expr($where));
87 sub _expand_select_clause_order_by {
88 my ($self, $order_by) = @_;
89 +(order_by => $self->_expand_order_by($order_by));
92 sub _expand_update_clause_target {
93 my ($self, $target) = @_;
94 +(target => $self->expand_expr($target, -ident));
97 sub _expand_update_clause_set {
98 return $_[1] if ref($_[1]) eq 'HASH' and ($_[1]->{-op}||[''])->[0] eq ',';
99 +(set => shift->_expand_update_set_values(@_));
102 sub _expand_update_clause_where {
103 +(where => shift->expand_expr(@_));
106 sub _expand_update_clause_returning {
107 +(returning => shift->_expand_maybe_list_expr(@_, -ident));
110 sub _expand_delete_clause_target {
111 +(target => shift->_expand_maybe_list_expr(@_, -ident));
114 sub _expand_delete_clause_where { +(where => shift->expand_expr(@_)); }
116 sub _expand_delete_clause_returning {
117 +(returning => shift->_expand_maybe_list_expr(@_, -ident));
120 sub _expand_statement {
121 my ($self, $type, $args) = @_;
122 my $ec = $self->{expand_clause};
123 return +{ "-${type}" => +{
125 my $val = $args->{$_};
126 if (defined($val) and my $exp = $ec->{"${type}.$_"}) {
127 if ((my (@exp) = $self->$exp($val)) == 1) {
139 sub _render_statement {
140 my ($self, $type, $args) = @_;
142 foreach my $clause (@{$self->{clauses_of}{$type}}) {
143 next unless my $clause_expr = $args->{$clause};
144 local $self->{convert_where} = $self->{convert} if $clause eq 'where';
145 my ($sql) = my @part = do {
146 if (my $rdr = $self->{render_clause}{"${type}.${clause}"}) {
147 $self->$rdr($clause_expr);
149 my ($clause_sql, @bind) = $self->render_aqt($clause_expr);
151 $self->_sqlcase(join ' ', split '_', $clause),
156 next unless defined($sql) and length($sql);
159 return $self->_join_parts(' ', @parts);
163 my ($self, @args) = @_;
165 return $self->render_expr({ -select => $_[1] }) if ref($_[1]) eq 'HASH';
168 @clauses{qw(from select where order_by)} = @args;
170 # This oddity is to literalify since historically SQLA doesn't quote
171 # a single identifier argument, so we convert it into a literal
173 $clauses{select} = { -literal => [ $clauses{select}||'*' ] }
174 unless ref($clauses{select});
176 return $self->render_expr({ -select => \%clauses });
180 my ($self, $table, $set, $where, $options) = @_;
182 return $self->render_expr({ -update => $_[1] }) if ref($_[1]) eq 'HASH';
185 @clauses{qw(target set where)} = ($table, $set, $where);
186 puke "Unsupported data type specified to \$sql->update"
187 unless ref($clauses{set}) eq 'HASH';
188 @clauses{keys %$options} = values %$options;
189 return $self->render_expr({ -update => \%clauses });
193 my ($self, $table, $where, $options) = @_;
195 return $self->render_expr({ -delete => $_[1] }) if ref($_[1]) eq 'HASH';
197 my %clauses = (target => $table, where => $where, %{$options||{}});
198 return $self->render_expr({ -delete => \%clauses });
202 my ($self, $table, $data, $options) = @_;
204 return $self->render_expr({ -insert => $_[1] }) if ref($_[1]) eq 'HASH';
206 my %clauses = (target => $table, values => $data, %{$options||{}});
207 return $self->render_expr({ -insert => \%clauses });
210 sub _expand_insert_clause_target {
211 +(target => shift->_expand_maybe_list_expr(@_, -ident));
214 sub _expand_insert_clause_values {
215 my ($self, $data) = @_;
216 return $data if ref($data) eq 'HASH' and $data->{-row};
217 my ($f_aqt, $v_aqt) = $self->_expand_insert_values($data);
218 return (values => $v_aqt, ($f_aqt ? (fields => $f_aqt) : ()));