3 class SQL::Abstract::AST::v1 extends SQL::Abstract {
8 use Moose::Util::TypeConstraints;
9 use MooseX::Types::Moose qw/ArrayRef Str Int Ref HashRef/;
10 use MooseX::AttributeHelpers;
11 use SQL::Abstract::Types qw/AST ArrayAST HashAST/;
15 # set things that are valid in where clauses
16 override _build_where_dispatch_table {
19 -in => $self->can('_in'),
20 -not_in => $self->can('_in'),
21 map { +"-$_" => $self->can("_$_") } qw/
30 method _select(HashAST $ast) {
34 method _where(ArrayAST $ast) {
35 my (undef, @clauses) = @$ast;
37 return 'WHERE ' . $self->_recurse_where(\@clauses);
40 method _order_by(ArrayAST $ast) {
41 my (undef, @clauses) = @$ast;
46 if ($_->[0] =~ /^-(asc|desc)$/) {
48 push @output, $self->dispatch($_->[1]) . " " . uc($o);
51 push @output, $self->dispatch($_);
54 return "ORDER BY " . join(", ", @output);
57 method _name(ArrayAST $ast) {
58 my (undef, @names) = @$ast;
60 my $sep = $self->name_separator;
63 join( $sep->[1] . $sep->[0], @names ) .
67 return join($sep->[0], @names);
70 method _join(HashAST $ast) {
72 my $output = 'JOIN ' . $self->dispatch($ast->{tablespec});
74 $output .= exists $ast->{on}
75 ? ' ON (' . $self->_recurse_where( $ast->{on} )
76 : ' USING (' .$self->dispatch($ast->{using} || croak "No 'on' or 'join' clause passed to -join");
83 method _list(ArrayAST $ast) {
84 my (undef, @items) = @$ast;
87 $self->list_separator,
88 map { $self->dispatch($_) } @items);
91 method _alias(ArrayAST $ast) {
92 my (undef, $alias, $as) = @$ast;
94 return $self->dispatch($alias) . " AS $as";
98 method _value(ArrayAST $ast) {
99 my ($undef, $value) = @$ast;
101 $self->add_bind($value);
105 method _recurse_where(ArrayRef $clauses) {
108 my $prio = $SQL::Abstract::PRIO{and};
109 my $first = $clauses->[0];
112 if ($first =~ /^-(and|or)$/) {
114 $prio = $SQL::Abstract::PRIO{$1};
117 # If first is not a ref, and its not -and or -or, then $clauses
118 # contains just a single clause
119 $clauses = [ $clauses ];
123 my $dispatch_table = $self->where_dispatch_table;
126 foreach (@$clauses) {
127 croak "invalid component in where clause: $_" unless is_ArrayRef($_);
130 if ($op =~ /^-(and|or)$/) {
131 my $sub_prio = $SQL::Abstract::PRIO{$1};
133 if ($sub_prio <= $prio) {
134 push @output, $self->_recurse_where($_);
136 push @output, '(' . $self->_recurse_where($_) . ')';
139 push @output, $self->_where_component($_);
143 return join(" $OP ", @output);
146 method _where_component(ArrayRef $ast) {
149 if (my $code = $self->lookup_where_dispatch($op)) {
151 return $code->($self, $ast);
154 croak "'$op' is not a valid clause in a where AST"
157 croak "'$op' is not a valid operator";
162 method _binop(ArrayRef $ast) {
163 my ($op, $lhs, $rhs) = @$ast;
165 join (' ', $self->_where_component($lhs),
166 $self->binop_mapping($op) || croak("Unknown binary operator $op"),
167 $self->_where_component($rhs)
171 method _in(ArrayAST $ast) {
172 my ($tag, $field, @values) = @$ast;
174 my $not = $tag =~ /^-not/ ? " NOT" : "";
176 return $self->_false if @values == 0;
177 return $self->_where_component($field) .
180 join(", ", map { $self->dispatch($_) } @values ) .
184 method _generic_func(ArrayRef $ast) {
187 # 'constants' that are portable across DBs
188 method _false($ast?) { "0 = 1" }
189 method _true($ast?) { "1 = 1" }