1 package Data::Query::Renderer::SQL::Naive;
4 use SQL::ReservedWords;
5 use Data::Query::Constants qw(DQ_IDENTIFIER DQ_OPERATOR DQ_VALUE);
8 bless({ %{$_[1]||{}} }, (ref($_[0])||$_[0]))->BUILDALL;
13 $self->{reserved_ident_parts}
15 our $_DEFAULT_RESERVED ||= { map +($_ => 1), SQL::ReservedWords->words }
17 $self->{quote_chars}||=[''];
18 $self->{simple_ops}||=$self->_default_simple_ops;
22 sub _default_simple_ops {
24 (map +($_ => 'binop'), qw(= > < >= <=) ),
25 (map +($_ => 'unop'), (qw(NOT)) ),
26 (map +($_ => 'flatten'), qw(AND OR) ),
32 $self->_flatten_structure($self->_render(@_))
35 sub _flatten_structure {
36 my ($self, $struct) = @_;
41 elsif ($r eq 'ARRAY') {
42 my ($sql, @b) = @{$self->_flatten_structure($_)};
46 elsif ($r eq 'HASH') { push @bind, $_; () }
47 else { die "_flatten_structure can't handle ref type $r for $_" }
52 $_[0]->${\"_render_${\lc($_[1]->{type})}"}($_[1]);
55 sub _render_identifier {
56 die "Unidentified identifier (SQL can no has \$_)"
57 unless my @i = @{$_[1]->{elements}};
58 # handle single or paired quote chars
59 my ($q1, $q2) = @{$_[0]->{quote_chars}}[0,-1];
60 my $always_quote = $_[0]->{always_quote};
61 my $res_check = $_[0]->{reserved_ident_parts};
64 $_[0]->{identifier_sep}||'.',
66 $_ eq '*' # Yes, this means you can't have a column just called '*'.
67 ? $_ # Yes, this is a feature. Go shoot the DBA if he disagrees.
68 : ( # reserved are stored uc, quote if non-word
69 $always_quote || $res_check->{+uc} || /\W/
81 sub _render_operator {
83 my $op = $dq->{operator};
84 unless (exists $op->{'SQL.Naive'}) {
85 $op->{'SQL.Naive'} = $self->_convert_op($dq);
87 if (my $op_type = $self->{simple_ops}{my $op_name = $op->{'SQL.Naive'}}) {
88 return $self->${\"_handle_op_type_${op_type}"}($op_name, $dq);
90 die "Couldn't render operator ".$op->{'SQL.Naive'};
93 sub _handle_op_type_binop {
94 my ($self, $op_name, $dq) = @_;
95 die "${op_name} registered as binary op but args contain "
96 .scalar(@{$dq->{args}})." entries"
97 unless @{$dq->{args}} == 2;
99 $self->_render($dq->{args}[0]),
101 $self->_render($dq->{args}[1]),
105 sub _handle_op_type_unop {
106 my ($self, $op_name, $dq) = @_;
107 die "${op_name} registered as unary op but args contain "
108 .scalar(@{$dq->{args}})." entries"
109 unless @{$dq->{args}} == 1;
112 $self->_render($dq->{args}[0]),
116 sub _handle_op_type_flatten {
117 my ($self, $op_name, $dq) = @_;
118 my @argq = @{$dq->{args}};
120 while (my $arg = shift @argq) {
122 unless ($arg->{type} eq DQ_OPERATOR) {
123 push @arg_final, $arg;
127 my $op = $arg->{operator};
128 unless (exists $op->{'SQL.Naive'}) {
129 $op->{'SQL.Naive'} = $self->_convert_op($arg);
132 if ($op->{'SQL.Naive'} eq $op_name) {
133 unshift @argq, @{$arg->{args}};
135 push @arg_final, $arg;
138 my @sql = ('(', map +($self->_render($_), $op_name), @arg_final);
139 $sql[-1] = ')'; # replace final AND or whatever with )
144 my ($self, $dq) = @_;
145 if (my $perl_op = $dq->{'operator'}->{'Perl'}) {
147 $_ eq '==' and return '=';
148 $_ eq 'eq' and return '=';
149 $_ eq '!' and return 'NOT';
151 return uc $perl_op; # hope!
153 die "Can't convert non-perl op yet";