remove a literal "" in favour of undef

[dbsrgits/SQL-Abstract.git] / lib / SQL / Abstract.pm

diff --git a/lib/SQL/Abstract.pm b/lib/SQL/Abstract.pm
index 62057d0..092598b 100644 (file)
--- a/lib/SQL/Abstract.pm
+++ b/lib/SQL/Abstract.pm
@@ -186,7 +186,7 @@ sub new {
 
   $opt{node_types} = +{
     map +("-$_" => '_render_'.$_),
-      qw(op func value bind ident literal list)
+      qw(op func bind ident literal list)
   };
 
   $opt{expand_unary} = {};
@@ -558,12 +558,12 @@ sub _expand_expr {
   }
   if (!ref($expr) or Scalar::Util::blessed($expr)) {
     if (my $d = $Default_Scalar_To) {
-      return +{ $d => $expr };
+      return $self->_expand_expr({ $d => $expr });
     }
     if (my $m = our $Cur_Col_Meta) {
       return +{ -bind => [ $m, $expr ] };
     }
-    return +{ -value => $expr };
+    return +{ -bind => [ undef, $expr ] };
   }
   die "notreached";
 }
@@ -639,8 +639,8 @@ sub _expand_expr_hashpair {
         return { -op => [ $op, $v ] };
       }
     }
-    if ($k eq '-value' and my $m = our $Cur_Col_Meta) {
-      return +{ -bind => [ $m, $v ] };
+    if ($k eq '-value') {
+      return +{ -bind => [ our $Cur_Col_Meta, $v ] };
     }
     if (my $custom = $self->{expand_unary}{$k}) {
       return $self->$custom($v);
@@ -691,7 +691,7 @@ sub _expand_expr_hashpair {
           sort keys %$v
       ] };
     }
-    return { -literal => [ '' ] } unless keys %$v;
+    return undef unless keys %$v;
     my ($vk, $vv) = %$v;
     $vk =~ s/^-//;
     $vk = lc($vk);
@@ -921,12 +921,6 @@ sub _render_ident {
   return $self->_convert($self->_quote($ident));
 }
 
-sub _render_value {
-  my ($self, $value) = @_;
-
-  return ($self->_convert('?'), $self->_bindtype(undef, $value));
-}
-
 my %unop_postfix = map +($_ => 1),
   'is null', 'is not null',
   'asc', 'desc',