1 package Data::Query::Renderer::SQL::MySQL;
3 use Data::Query::Constants;
4 use Data::Query::ExprHelpers;
7 extends 'Data::Query::Renderer::SQL::Naive';
9 with 'Data::Query::Renderer::SQL::Slice::LimitXY';
11 sub _insert_default_values {
13 $self->_format_keyword('VALUES'), qw( ( ) );
16 foreach my $type (qw(update delete)) {
17 around "_render_${type}" => sub {
18 my ($orig, $self) = (shift, shift);
19 $self->$orig($self->_maybe_double_subquery(@_));
23 sub _maybe_double_subquery {
25 my $target = $dq->{target};
27 foreach my $key (qw(set where)) {
28 next unless $dq->{$key};
29 $new->{$key} = map_dq_tree {
33 if (is_Identifier($target)) {
34 my $ident = $target->{elements}[0];
35 +{ DQ_IDENTIFIER ,=> sub {
36 my @el = @{$_[0]->{elements}};
37 $found = 1 if @el == 1 and $el[0] eq $ident;
40 } elsif (is_Literal($target)) {
41 my $ident = $target->{literal} or die "Can't handle complex literal";
42 +{ DQ_LITERAL ,=> sub {
43 my $lit = $_[0]->{literal};
44 $found = 1 if $lit and $lit eq $ident;
48 die "Can't handle target type ".$target->{type};
52 \Select([ Identifier('*') ], Alias('_forced_double_subquery', $_));