1 package SQL::Abstract::ExtraClauses;
5 use if $] < '5.010', 'MRO::Compat';
7 use base qw(SQL::Abstract::Clauses);
9 BEGIN { *puke = \&SQL::Abstract::puke }
12 my ($proto, @args) = @_;
13 my $new = $proto->next::method(@args);
14 $new->{clauses_of}{select} = [
15 @{$new->{clauses_of}{select}}, qw(group_by having)
17 $new->{expand_clause}{'select.group_by'} = sub {
18 $_[0]->_expand_maybe_list_expr($_[1], -ident)
20 $new->{expand_clause}{'select.having'} = sub {
21 $_[0]->expand_expr($_[1])
23 $new->{expand}{from_list} = '_expand_from_list';
24 $new->{render}{from_list} = '_render_from_list';
25 $new->{expand}{join} = '_expand_join';
26 $new->{render}{join} = '_render_join';
27 $new->{expand_op}{as} = '_expand_op_as';
28 $new->{expand}{as} = '_expand_op_as';
29 $new->{render}{as} = '_render_as';
30 splice(@{$new->{clauses_of}{update}}, 2, 0, 'from');
31 splice(@{$new->{clauses_of}{delete}}, 1, 0, 'using');
32 $new->{expand_clause}{'update.from'} = '_expand_select_clause_from';
33 $new->{expand_clause}{'delete.using'} = sub {
34 +(using => $_[0]->_expand_from_list(undef, $_[1]));
39 sub _expand_select_clause_from {
40 my ($self, $from) = @_;
41 +(from => $self->_expand_from_list(undef, $from));
44 sub _expand_from_list {
45 my ($self, undef, $args) = @_;
46 if (ref($args) eq 'HASH') {
47 return { -from_list => [ $self->expand_expr($args) ] };
50 my @args = ref($args) ? @$args : ($args);
51 while (my $entry = shift @args) {
52 if (!ref($entry) and $entry =~ /^-(.*)/) {
54 $list[-1] = $self->expand_expr({ -as => [
55 $list[-1], map +(ref($_) eq 'ARRAY' ? @$_ : $_), shift(@args)
59 $entry = { $entry => shift @args };
61 my $aqt = $self->expand_expr($entry, -ident);
62 if ($aqt->{-join} and not $aqt->{-join}{from}) {
63 $aqt->{-join}{from} = pop @list;
67 return { -from_list => \@list };
71 my ($self, undef, $args) = @_;
75 : (to => $args->[0], @{$args}[1..$#$args])
77 if (my $as = delete $proto{as}) {
78 $proto{to} = { -as => [ $proto{to}, ref($as) eq 'ARRAY' ? @$as : $as ] };
80 if (defined($proto{using}) and ref(my $using = $proto{using}) ne 'HASH') {
81 $proto{using} = { -row => [
82 map [ $self->expand_expr($_, -ident) ],
83 ref($using) eq 'ARRAY' ? @$using: $using
86 my %ret = map +($_ => $self->expand_expr($proto{$_}, -ident)),
88 return +{ -join => \%ret };
91 sub _render_from_list {
92 my ($self, $list) = @_;
93 return $self->_join_parts(', ', map [ $self->render_aqt($_) ], @$list);
97 my ($self, $args) = @_;
100 [ $self->render_aqt($args->{from}) ],
103 ? join(' ', split '_', $args->{type}).' '
110 map +($_->{-ident} || $_->{-as} ? $_ : { -row => [ $_ ] }), $args->{to}
113 [ $self->_sqlcase('on') ],
114 [ $self->render_aqt($args->{on}) ],
117 [ $self->_sqlcase('using') ],
118 [ $self->render_aqt($args->{using}) ],
121 return $self->_join_parts(' ', @parts);
125 my ($self, undef, $vv, $k) = @_;
126 my @as = map $self->expand_expr($_, -ident),
127 (defined($k) ? ($k) : ()), ref($vv) eq 'ARRAY' ? @$vv : $vv;
128 return { -as => \@as };
132 my ($self, $args) = @_;
133 my ($thing, $as, @cols) = @$args;
134 return $self->_join_parts(
137 map +($_->{-ident} ? $_ : { -row => [ $_ ] }), $thing
139 [ $self->_sqlcase('as') ],
141 ? [ $self->_join_parts('',
142 [ $self->render_aqt($as) ],
144 [ $self->_join_parts(
146 map [ $self->render_aqt($_) ], @cols
150 : [ $self->render_aqt($as) ]