port clause renderers to arrayref convention

[scpubgit/Q-Branch.git] / lib / SQL / Abstract / ExtraClauses.pm

diff --git a/lib/SQL/Abstract/ExtraClauses.pm b/lib/SQL/Abstract/ExtraClauses.pm
index ad49758..9eb04a8 100644 (file)
--- a/lib/SQL/Abstract/ExtraClauses.pm
+++ b/lib/SQL/Abstract/ExtraClauses.pm
@@ -62,9 +62,9 @@ sub register_defaults {
   );
 
   # set ops
-  {
-    my $orig = $self->expander('select');
-    $self->expander(select => sub {
+  $self->wrap_expander(select => sub {
+    my $orig = shift;
+    sub {
       my $self = shift;
       my $exp = $self->$orig(@_);
       return $exp unless my $setop = (my $sel = $exp->{-select})->{setop};
@@ -74,8 +74,8 @@ sub register_defaults {
           { -select => \%inner };
       }
       return $exp;
-    });
-  }
+    }
+  });
   my $expand_setop = sub {
     my ($self, $setop, $args) = @_;
     +{ "-${setop}" => {
@@ -87,37 +87,38 @@ sub register_defaults {
 
   $self->clause_renderer('select.setop' => sub {
     my ($self, undef, $setop) = @_;
-    $self->render_aqt($setop);
+    @{ $self->render_aqt($setop) };
   });
 
   $self->renderer($_ => sub {
     my ($self, $setop, $args) = @_;
-    $self->join_clauses(
+    $self->join_query_parts(
       ' '.$self->format_keyword(join '_', $setop, ($args->{type}||())).' ',
-      map [ $self->render_aqt($_) ], @{$args->{queries}}
+      @{$args->{queries}}
     );
   }) for qw(union intersect except);
 
-  foreach my $setop (qw(union intersect except)) {
+  my $setop_expander = sub {
+    my ($self, $setop, $args) = @_;
+    my ($op, $type) = split '_', $setop;
+    +(setop => $self->expand_expr({
+      "-${op}" => {
+        ($type ? (type => $type) : ()),
+        queries => (ref($args) eq 'ARRAY' ? $args : [ $args ])
+      }
+    }));
+  };
+
+  $self->clause_expanders(
+    map +($_ => $setop_expander),
+      map "select.${_}",
+        map +($_, "${_}_all", "${_}_distinct"),
+          qw(union intersect except)
+  );
 
-    $self->clause_expander("select.${setop}" => sub {
-      +(setop => $_[0]->expand_expr({
-                   "-${setop}" => {
-                     queries => (ref($_[2]) eq 'ARRAY' ? $_[2] : [ $_[2] ]),
-                   }
-                 }));
-    });
-    $self->clause_expander("select.${setop}_all" => sub {
-      +(setop => $_[0]->expand_expr({
-                   "-${setop}" => {
-                     type => 'all',
-                     queries => (ref($_[2]) eq 'ARRAY' ? $_[2] : [ $_[2] ]),
-                   }
-                 }));
-    });
-  }
   $self->clause_expander('select.with' => my $with_expander = sub {
-    my ($self, undef, $with) = @_;
+    my ($self, $name, $with) = @_;
+    my (undef, $type) = split '_', $name;
     if (ref($with) eq 'HASH') {
       return +{
         %$with,
@@ -134,30 +135,23 @@ sub register_defaults {
         $self->expand_expr($query)
       ];
     }
-    return +{ queries => \@exp };
-  });
-  $self->clause_expander('select.with_recursive' => sub {
-    my ($self, undef, $with) = @_;
-    my $exp = $self->$with_expander(undef, $with);
-    return +(with => +{
-      %$exp,
-      type => 'recursive'
-    });
+    return +(with => { ($type ? (type => $type) : ()), queries => \@exp });
   });
+  $self->clause_expander('select.with_recursive', $with_expander);
   $self->clause_renderer('select.with' => sub {
     my ($self, undef, $with) = @_;
-    my $q_part = [ $self->join_clauses(', ',
+    my $q_part = [ $self->join_query_parts(', ',
       map {
         my ($alias, $query) = @$_;
-        [ $self->join_clauses(' ',
-            [ $self->_render_alias($alias) ],
-            [ $self->format_keyword('as') ],
-            [ $self->render_aqt($query) ],
+        [ $self->join_query_parts(' ',
+            $self->_render_alias($alias),
+            $self->format_keyword('as'),
+            $query,
         ) ]
       } @{$with->{queries}}
     ) ];
-    return $self->join_clauses(' ',
-      [ $self->format_keyword(join '_', 'with', ($with->{type}||'')) ],
+    return $self->join_query_parts(' ',
+      $self->format_keyword(join '_', 'with', ($with->{type}||'')),
       $q_part,
     );
   });
@@ -165,8 +159,6 @@ sub register_defaults {
   return $self;
 }
 
-sub format_keyword { $_[0]->_sqlcase(join ' ', split '_', $_[1]) }
-
 sub _expand_select_clause_from {
   my ($self, undef, $from) = @_;
   +(from => $self->_expand_from_list(undef, $from));
@@ -221,28 +213,26 @@ sub _expand_join {
 
 sub _render_from_list {
   my ($self, undef, $list) = @_;
-  return $self->join_clauses(', ', map [ $self->render_aqt($_) ], @$list);
+  return $self->join_query_parts(', ', @$list);
 }
 
 sub _render_join {
   my ($self, undef, $args) = @_;
 
   my @parts = (
-    [ $self->render_aqt($args->{from}) ],
-    [ $self->format_keyword(join '_', ($args->{type}||()), 'join') ],
-    [ $self->render_aqt(
-        map +($_->{-ident} || $_->{-as} ? $_ : { -row => [ $_ ] }), $args->{to}
-    ) ],
+    $args->{from},
+    $self->format_keyword(join '_', ($args->{type}||()), 'join'),
+    (map +($_->{-ident} || $_->{-as} ? $_ : { -row => [ $_ ] }), $args->{to}),
     ($args->{on} ? (
-      [ $self->format_keyword('on') ],
-      [ $self->render_aqt($args->{on}) ],
+      $self->format_keyword('on') ,
+      $args->{on},
     ) : ()),
     ($args->{using} ? (
-      [ $self->format_keyword('using') ],
-      [ $self->render_aqt($args->{using}) ],
+      $self->format_keyword('using'),
+      $args->{using},
     ) : ()),
   );
-  return $self->join_clauses(' ', @parts);
+  return $self->join_query_parts(' ', @parts);
 }
 
 sub _expand_op_as {
@@ -255,11 +245,11 @@ sub _expand_op_as {
 sub _render_as {
   my ($self, undef, $args) = @_;
   my ($thing, @alias) = @$args;
-  return $self->join_clauses(
+  return $self->join_query_parts(
     ' ',
-    [ $self->render_aqt($thing) ],
-    [ $self->format_keyword('as') ],
-    [ $self->_render_alias(\@alias) ],
+    $self->render_aqt($thing),
+    $self->format_keyword('as'),
+    $self->_render_alias(\@alias),
   );
 }
 
@@ -267,12 +257,12 @@ sub _render_alias {
   my ($self, $args) = @_;
   my ($as, @cols) = @$args;
   return (@cols
-    ? $self->join_clauses('',
-         [ $self->render_aqt($as) ],
+    ? $self->join_query_parts('',
+         $as,
          [ '(' ],
-         [ $self->join_clauses(
+         [ $self->join_query_parts(
              ', ',
-             map [ $self->render_aqt($_) ], @cols
+             @cols
          ) ],
          [ ')' ],
       )