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 $self->{expand_clause}{"update.$_"} = "_expand_update_clause_$_"
25 for @{$self->{clauses_of}{update}};
26 $self->{clauses_of}{delete} = [ qw(delete_from where returning) ];
27 $self->{expand}{delete} = sub { shift->_expand_statement(@_) };
28 $self->{render}{delete} = sub { shift->_render_statement(delete => @_) };
29 $self->{expand_clause}{"delete.$_"} = "_expand_delete_clause_$_"
30 for @{$self->{clauses_of}{delete}};
31 $self->{clauses_of}{insert} = [
32 'insert_into', 'fields', 'values', 'returning'
34 $self->{expand}{insert} = sub { shift->_expand_statement(@_) };
35 $self->{render}{insert} = sub { shift->_render_statement(insert => @_) };
36 $self->{expand_clause}{'insert.insert_into'} = sub {
37 shift->expand_expr(@_, -ident);
39 $self->{expand_clause}{'insert.returning'} = sub {
40 shift->_expand_maybe_list_expr(@_, -ident);
42 $self->{render_clause}{'insert.fields'} = sub {
43 return $_[0]->render_aqt({ -row => [ $_[1] ] });
48 sub _expand_select_clause_select {
49 my ($self, $select) = @_;
50 +(select => $self->_expand_maybe_list_expr($select, -ident));
53 sub _expand_select_clause_from {
54 my ($self, $from) = @_;
55 +(from => $self->_expand_maybe_list_expr($from, -ident));
58 sub _expand_select_clause_where {
59 my ($self, $where) = @_;
60 +(where => $self->expand_expr($where));
63 sub _expand_select_clause_order_by {
64 my ($self, $order_by) = @_;
65 +(order_by => $self->_expand_order_by($order_by));
68 sub _expand_update_clause_update {
69 my ($self, $target) = @_;
70 +(update => $self->expand_expr($target, -ident));
73 sub _expand_update_clause_set {
74 +(set => shift->_expand_update_set_values(@_));
77 sub _expand_update_clause_where {
78 +(where => shift->expand_expr(@_));
81 sub _expand_update_clause_returning {
82 +(returning => shift->_expand_maybe_list_expr(@_, -ident));
85 sub _expand_delete_clause_delete_from {
86 +(delete_from => shift->_expand_maybe_list_expr(@_, -ident));
89 sub _expand_delete_clause_where { +(where => shift->expand_expr(@_)); }
91 sub _expand_delete_clause_returning {
92 +(returning => shift->_expand_maybe_list_expr(@_, -ident));
95 sub _expand_statement {
96 my ($self, $type, $args) = @_;
97 my $ec = $self->{expand_clause};
98 return +{ "-${type}" => +{
100 my $val = $args->{$_};
101 if (defined($val) and my $exp = $ec->{"${type}.$_"}) {
102 if ((my (@exp) = $self->$exp($val)) == 1) {
114 sub _render_statement {
115 my ($self, $type, $args) = @_;
117 foreach my $clause (@{$self->{clauses_of}{$type}}) {
118 next unless my $clause_expr = $args->{$clause};
119 local $self->{convert_where} = $self->{convert} if $clause eq 'where';
120 my ($sql) = my @part = do {
121 if (my $rdr = $self->{render_clause}{"${type}.${clause}"}) {
122 $self->$rdr($clause_expr);
124 my ($clause_sql, @bind) = $self->render_aqt($clause_expr);
126 $self->_sqlcase(join ' ', split '_', $clause),
131 next unless defined($sql) and length($sql);
134 return $self->_join_parts(' ', @parts);
138 my ($self, @args) = @_;
140 @clauses{qw(from select where order_by)} = @args;
142 # This oddity is to literalify since historically SQLA doesn't quote
143 # a single identifier argument, so we convert it into a literal
145 $clauses{select} = { -literal => [ $clauses{select}||'*' ] }
146 unless ref($clauses{select});
148 my ($sql, @bind) = $self->render_expr({ -select => \%clauses });
149 return wantarray ? ($sql, @bind) : $sql;
153 my ($self, $table, $set, $where, $options) = @_;
155 @clauses{qw(update set where)} = ($table, $set, $where);
156 puke "Unsupported data type specified to \$sql->update"
157 unless ref($clauses{set}) eq 'HASH';
158 @clauses{keys %$options} = values %$options;
159 my ($sql, @bind) = $self->render_expr({ -update => \%clauses });
160 return wantarray ? ($sql, @bind) : $sql;
164 my ($self, $table, $where, $options) = @_;
165 my %clauses = (delete_from => $table, where => $where, %{$options||{}});
166 my ($sql, @bind) = $self->render_expr({ -delete => \%clauses });
167 return wantarray ? ($sql, @bind) : $sql;
171 my ($self, $table, $data, $options) = @_;
172 my %clauses = (insert_into => $table, %{$options||{}});
173 my ($f_aqt, $v_aqt) = $self->_expand_insert_values($data);
174 $clauses{fields} = $f_aqt if $f_aqt;
175 $clauses{values} = $v_aqt;
176 my ($sql, @bind) = $self->render_expr({ -insert => \%clauses });
177 return wantarray ? ($sql, @bind) : $sql;