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.values'} = '_expand_insert_clause_values';
52 $self->{expand_clause}{'insert.returning'} = sub {
53 shift->_expand_maybe_list_expr(@_, -ident);
55 $self->{render_clause}{'insert.fields'} = sub {
56 return $_[0]->render_aqt($_[1]);
58 $self->{render_clause}{'insert.target'} = sub {
59 my ($self, $from) = @_;
60 my ($sql, @bind) = $self->render_aqt($from);
61 ($self->_sqlcase('insert into ').$sql, @bind);
66 sub _expand_select_clause_select {
67 my ($self, $select) = @_;
68 +(select => $self->_expand_maybe_list_expr($select, -ident));
71 sub _expand_select_clause_from {
72 my ($self, $from) = @_;
73 +(from => $self->_expand_maybe_list_expr($from, -ident));
76 sub _expand_select_clause_where {
77 my ($self, $where) = @_;
78 +(where => $self->expand_expr($where));
81 sub _expand_select_clause_order_by {
82 my ($self, $order_by) = @_;
83 +(order_by => $self->_expand_order_by($order_by));
86 sub _expand_update_clause_target {
87 my ($self, $target) = @_;
88 +(target => $self->expand_expr($target, -ident));
91 sub _expand_update_clause_set {
92 return $_[1] if ref($_[1]) eq 'HASH' and ($_[1]->{-op}||[''])->[0] eq ',';
93 +(set => shift->_expand_update_set_values(@_));
96 sub _expand_update_clause_where {
97 +(where => shift->expand_expr(@_));
100 sub _expand_update_clause_returning {
101 +(returning => shift->_expand_maybe_list_expr(@_, -ident));
104 sub _expand_delete_clause_target {
105 +(target => shift->_expand_maybe_list_expr(@_, -ident));
108 sub _expand_delete_clause_where { +(where => shift->expand_expr(@_)); }
110 sub _expand_delete_clause_returning {
111 +(returning => shift->_expand_maybe_list_expr(@_, -ident));
114 sub _expand_statement {
115 my ($self, $type, $args) = @_;
116 my $ec = $self->{expand_clause};
117 return +{ "-${type}" => +{
119 my $val = $args->{$_};
120 if (defined($val) and my $exp = $ec->{"${type}.$_"}) {
121 if ((my (@exp) = $self->$exp($val)) == 1) {
133 sub _render_statement {
134 my ($self, $type, $args) = @_;
136 foreach my $clause (@{$self->{clauses_of}{$type}}) {
137 next unless my $clause_expr = $args->{$clause};
138 local $self->{convert_where} = $self->{convert} if $clause eq 'where';
139 my ($sql) = my @part = do {
140 if (my $rdr = $self->{render_clause}{"${type}.${clause}"}) {
141 $self->$rdr($clause_expr);
143 my ($clause_sql, @bind) = $self->render_aqt($clause_expr);
145 $self->_sqlcase(join ' ', split '_', $clause),
150 next unless defined($sql) and length($sql);
153 return $self->_join_parts(' ', @parts);
157 my ($self, @args) = @_;
159 @clauses{qw(from select where order_by)} = @args;
161 # This oddity is to literalify since historically SQLA doesn't quote
162 # a single identifier argument, so we convert it into a literal
164 $clauses{select} = { -literal => [ $clauses{select}||'*' ] }
165 unless ref($clauses{select});
167 my ($sql, @bind) = $self->render_expr({ -select => \%clauses });
168 return wantarray ? ($sql, @bind) : $sql;
172 my ($self, $table, $set, $where, $options) = @_;
174 @clauses{qw(target set where)} = ($table, $set, $where);
175 puke "Unsupported data type specified to \$sql->update"
176 unless ref($clauses{set}) eq 'HASH';
177 @clauses{keys %$options} = values %$options;
178 my ($sql, @bind) = $self->render_expr({ -update => \%clauses });
179 return wantarray ? ($sql, @bind) : $sql;
183 my ($self, $table, $where, $options) = @_;
184 my %clauses = (target => $table, where => $where, %{$options||{}});
185 my ($sql, @bind) = $self->render_expr({ -delete => \%clauses });
186 return wantarray ? ($sql, @bind) : $sql;
190 my ($self, $table, $data, $options) = @_;
191 my %clauses = (target => $table, values => $data, %{$options||{}});
192 my ($sql, @bind) = $self->render_expr({ -insert => \%clauses });
193 return wantarray ? ($sql, @bind) : $sql;
196 sub _expand_insert_clause_target {
197 +(target => shift->_expand_maybe_list_expr(@_, -ident));
200 sub _expand_insert_clause_values {
201 my ($self, $data) = @_;
202 return $data if ref($data) eq 'HASH' and $data->{-row};
203 my ($f_aqt, $v_aqt) = $self->_expand_insert_values($data);
204 return (values => $v_aqt, ($f_aqt ? (fields => $f_aqt) : ()));