1 package SQL::Abstract::Clauses;
6 use base 'SQL::Abstract';
8 BEGIN { *puke = \&SQL::Abstract::puke }
11 shift->next::method(@_)->register_defaults
14 sub register_defaults {
16 $self->{clauses_of}{select} = [ qw(select from where order_by) ];
17 $self->{expand}{select} = sub { shift->_expand_statement(@_) };
18 $self->{render}{select} = sub { shift->_render_statement(select => @_) };
19 $self->{expand_clause}{"select.$_"} = "_expand_select_clause_$_"
20 for @{$self->{clauses_of}{select}};
21 $self->{clauses_of}{update} = [ qw(update set where returning) ];
22 $self->{expand}{update} = sub { shift->_expand_statement(@_) };
23 $self->{render}{update} = sub { shift->_render_statement(update => @_) };
24 $self->{expand_clause}{'update.update'} = sub {
25 $_[0]->expand_expr($_[1], -ident)
27 $self->{expand_clause}{'update.set'} = '_expand_update_set_values';
28 $self->{expand_clause}{'update.where'} = 'expand_expr';
29 $self->{expand_clause}{'update.returning'} = sub {
30 shift->_expand_maybe_list_expr(@_, -ident);
32 $self->{clauses_of}{delete} = [ qw(delete_from where returning) ];
33 $self->{expand}{delete} = sub { shift->_expand_statement(@_) };
34 $self->{render}{delete} = sub { shift->_render_statement(delete => @_) };
35 $self->{expand_clause}{'delete.delete_from'} = sub {
36 $_[0]->_expand_maybe_list_expr($_[1], -ident)
38 $self->{expand_clause}{'delete.where'} = 'expand_expr';
39 $self->{expand_clause}{'delete.returning'} = sub {
40 shift->_expand_maybe_list_expr(@_, -ident);
42 $self->{clauses_of}{insert} = [
43 'insert_into', 'fields', 'values', 'returning'
45 $self->{expand}{insert} = sub { shift->_expand_statement(@_) };
46 $self->{render}{insert} = sub { shift->_render_statement(insert => @_) };
47 $self->{expand_clause}{'insert.insert_into'} = sub {
48 shift->expand_expr(@_, -ident);
50 $self->{expand_clause}{'insert.returning'} = sub {
51 shift->_expand_maybe_list_expr(@_, -ident);
53 $self->{render_clause}{'insert.fields'} = sub {
54 return $_[0]->render_aqt({ -row => [ $_[1] ] });
59 sub _expand_select_clause_select {
60 my ($self, $select) = @_;
61 +(select => $self->_expand_maybe_list_expr($select, -ident));
64 sub _expand_select_clause_from {
65 my ($self, $from) = @_;
66 +(from => $self->_expand_maybe_list_expr($from, -ident));
69 sub _expand_select_clause_where {
70 my ($self, $where) = @_;
71 +(where => $self->expand_expr($where));
74 sub _expand_select_clause_order_by {
75 my ($self, $order_by) = @_;
76 +(order_by => $self->_expand_order_by($order_by));
79 sub _expand_statement {
80 my ($self, $type, $args) = @_;
81 my $ec = $self->{expand_clause};
82 return +{ "-${type}" => +{
84 my $val = $args->{$_};
85 if (defined($val) and my $exp = $ec->{"${type}.$_"}) {
86 if ((my (@exp) = $self->$exp($val)) == 1) {
98 sub _render_statement {
99 my ($self, $type, $args) = @_;
101 foreach my $clause (@{$self->{clauses_of}{$type}}) {
102 next unless my $clause_expr = $args->{$clause};
103 local $self->{convert_where} = $self->{convert} if $clause eq 'where';
104 my ($sql) = my @part = do {
105 if (my $rdr = $self->{render_clause}{"${type}.${clause}"}) {
106 $self->$rdr($clause_expr);
108 my ($clause_sql, @bind) = $self->render_aqt($clause_expr);
110 $self->_sqlcase(join ' ', split '_', $clause),
115 next unless defined($sql) and length($sql);
118 return $self->_join_parts(' ', @parts);
122 my ($self, @args) = @_;
124 @clauses{qw(from select where order_by)} = @args;
126 # This oddity is to literalify since historically SQLA doesn't quote
127 # a single identifier argument, so we convert it into a literal
129 $clauses{select} = { -literal => [ $clauses{select}||'*' ] }
130 unless ref($clauses{select});
132 my ($sql, @bind) = $self->render_expr({ -select => \%clauses });
133 return wantarray ? ($sql, @bind) : $sql;
137 my ($self, $table, $set, $where, $options) = @_;
139 @clauses{qw(update set where)} = ($table, $set, $where);
140 puke "Unsupported data type specified to \$sql->update"
141 unless ref($clauses{set}) eq 'HASH';
142 @clauses{keys %$options} = values %$options;
143 my ($sql, @bind) = $self->render_expr({ -update => \%clauses });
144 return wantarray ? ($sql, @bind) : $sql;
148 my ($self, $table, $where, $options) = @_;
149 my %clauses = (delete_from => $table, where => $where, %{$options||{}});
150 my ($sql, @bind) = $self->render_expr({ -delete => \%clauses });
151 return wantarray ? ($sql, @bind) : $sql;
155 my ($self, $table, $data, $options) = @_;
156 my %clauses = (insert_into => $table, %{$options||{}});
157 my ($f_aqt, $v_aqt) = $self->_expand_insert_values($data);
158 $clauses{fields} = $f_aqt if $f_aqt;
159 $clauses{values} = $v_aqt;
160 my ($sql, @bind) = $self->render_expr({ -insert => \%clauses });
161 return wantarray ? ($sql, @bind) : $sql;