apply type op and NULL handling

diff --git a/lib/Data/Query/Renderer/SQL/Naive.pm b/lib/Data/Query/Renderer/SQL/Naive.pm
index bb81339..c20e610 100644 (file)
--- a/lib/Data/Query/Renderer/SQL/Naive.pm
+++ b/lib/Data/Query/Renderer/SQL/Naive.pm
@@ -28,7 +28,8 @@ sub _default_simple_ops {
     (map +($_ => 'unop_reverse'), ('IS NULL', 'IS NOT NULL')),
     (map +($_ => 'flatten'), qw(AND OR) ),
     (map +($_ => 'in'), ('IN', 'NOT IN')),
-    (map +($_ => 'between'), ('BETWEEN', 'NOT BETWEEN'))
+    (map +($_ => 'between'), ('BETWEEN', 'NOT BETWEEN')),
+    (apply => 'apply'),
   }
 }
 
@@ -100,7 +101,9 @@ sub _render_identifier {
 }
 
 sub _render_value {
-  [ '?', $_[1] ];
+  defined($_[1]->{value})
+    ? [ '?', $_[1] ]
+    : [ 'NULL' ];
 }
 
 sub _operator_type { 'SQL.Naive' }
@@ -198,6 +201,19 @@ sub _handle_op_type_between {
   [ $lhs, $op_name, $rhs1, 'AND', $rhs2 ];
 }
 
+sub _handle_op_type_apply {
+  my ($self, $op_name, $dq) = @_;
+  my ($func, @args) = @{$dq->{args}};
+  die "Function name must be identifier"
+    unless $func->{type} eq DQ_IDENTIFIER;
+  my $ident = $self->_render($func)->[0];
+  [
+    "$ident(",
+    (map $self->_render($_), @args),
+    ')'
+  ]
+}
+
 sub _convert_op {
   my ($self, $dq) = @_;
   if (my $perl_op = $dq->{'operator'}->{'Perl'}) {