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(update 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->{clauses_of}{delete} = [ qw(delete_from where returning) ];
28 $self->{expand}{delete} = sub { shift->_expand_statement(@_) };
29 $self->{render}{delete} = sub { shift->_render_statement(delete => @_) };
30 $self->{expand_clause}{"delete.$_"} = "_expand_delete_clause_$_"
31 for @{$self->{clauses_of}{delete}};
32 $self->{clauses_of}{insert} = [
33 'insert_into', 'fields', 'values', 'returning'
35 $self->{expand}{insert} = sub { shift->_expand_statement(@_) };
36 $self->{render}{insert} = sub { shift->_render_statement(insert => @_) };
37 $self->{expand_clause}{'insert.insert_into'} = sub {
38 shift->expand_expr(@_, -ident);
40 $self->{expand_clause}{'insert.values'} = '_expand_insert_clause_values';
41 $self->{expand_clause}{'insert.returning'} = sub {
42 shift->_expand_maybe_list_expr(@_, -ident);
44 $self->{render_clause}{'insert.fields'} = sub {
45 return $_[0]->render_aqt($_[1]);
50 sub _expand_select_clause_select {
51 my ($self, $select) = @_;
52 +(select => $self->_expand_maybe_list_expr($select, -ident));
55 sub _expand_select_clause_from {
56 my ($self, $from) = @_;
57 +(from => $self->_expand_maybe_list_expr($from, -ident));
60 sub _expand_select_clause_where {
61 my ($self, $where) = @_;
62 +(where => $self->expand_expr($where));
65 sub _expand_select_clause_order_by {
66 my ($self, $order_by) = @_;
67 +(order_by => $self->_expand_order_by($order_by));
70 sub _expand_update_clause_update {
71 my ($self, $target) = @_;
72 +(update => $self->expand_expr($target, -ident));
75 sub _expand_update_clause_set {
76 return $_[1] if ref($_[1]) eq 'HASH' and ($_[1]->{-op}||[''])->[0] eq ',';
77 +(set => shift->_expand_update_set_values(@_));
80 sub _expand_update_clause_where {
81 +(where => shift->expand_expr(@_));
84 sub _expand_update_clause_returning {
85 +(returning => shift->_expand_maybe_list_expr(@_, -ident));
88 sub _expand_delete_clause_delete_from {
89 +(delete_from => shift->_expand_maybe_list_expr(@_, -ident));
92 sub _expand_delete_clause_where { +(where => shift->expand_expr(@_)); }
94 sub _expand_delete_clause_returning {
95 +(returning => shift->_expand_maybe_list_expr(@_, -ident));
98 sub _expand_statement {
99 my ($self, $type, $args) = @_;
100 my $ec = $self->{expand_clause};
101 return +{ "-${type}" => +{
103 my $val = $args->{$_};
104 if (defined($val) and my $exp = $ec->{"${type}.$_"}) {
105 if ((my (@exp) = $self->$exp($val)) == 1) {
117 sub _render_statement {
118 my ($self, $type, $args) = @_;
120 foreach my $clause (@{$self->{clauses_of}{$type}}) {
121 next unless my $clause_expr = $args->{$clause};
122 local $self->{convert_where} = $self->{convert} if $clause eq 'where';
123 my ($sql) = my @part = do {
124 if (my $rdr = $self->{render_clause}{"${type}.${clause}"}) {
125 $self->$rdr($clause_expr);
127 my ($clause_sql, @bind) = $self->render_aqt($clause_expr);
129 $self->_sqlcase(join ' ', split '_', $clause),
134 next unless defined($sql) and length($sql);
137 return $self->_join_parts(' ', @parts);
141 my ($self, @args) = @_;
143 @clauses{qw(from select where order_by)} = @args;
145 # This oddity is to literalify since historically SQLA doesn't quote
146 # a single identifier argument, so we convert it into a literal
148 $clauses{select} = { -literal => [ $clauses{select}||'*' ] }
149 unless ref($clauses{select});
151 my ($sql, @bind) = $self->render_expr({ -select => \%clauses });
152 return wantarray ? ($sql, @bind) : $sql;
156 my ($self, $table, $set, $where, $options) = @_;
158 @clauses{qw(update set where)} = ($table, $set, $where);
159 puke "Unsupported data type specified to \$sql->update"
160 unless ref($clauses{set}) eq 'HASH';
161 @clauses{keys %$options} = values %$options;
162 my ($sql, @bind) = $self->render_expr({ -update => \%clauses });
163 return wantarray ? ($sql, @bind) : $sql;
167 my ($self, $table, $where, $options) = @_;
168 my %clauses = (delete_from => $table, where => $where, %{$options||{}});
169 my ($sql, @bind) = $self->render_expr({ -delete => \%clauses });
170 return wantarray ? ($sql, @bind) : $sql;
174 my ($self, $table, $data, $options) = @_;
175 my %clauses = (insert_into => $table, values => $data, %{$options||{}});
176 my ($sql, @bind) = $self->render_expr({ -insert => \%clauses });
177 return wantarray ? ($sql, @bind) : $sql;
180 sub _expand_insert_clause_values {
181 my ($self, $data) = @_;
182 return $data if ref($data) eq 'HASH' and $data->{-row};
183 my ($f_aqt, $v_aqt) = $self->_expand_insert_values($data);
184 return (values => $v_aqt, ($f_aqt ? (fields => $f_aqt) : ()));