4 files changed, 3 insertions, 15 deletions
diff --git a/lib/arel/visitors/dot.rb b/lib/arel/visitors/dot.rb
index c515cbe220..eab5e4afdc 100644
--- a/lib/arel/visitors/dot.rb
+++ b/lib/arel/visitors/dot.rb
@@ -28,10 +28,6 @@ module Arel
       end
 
       private
-      def visit_Arel_Nodes_Grouping o
-        visit_edge o, "expr"
-      end
-
       def visit_Arel_Nodes_Ordering o
         visit_edge o, "expr"
         visit_edge o, "direction"
@@ -55,10 +51,6 @@ module Arel
         visit_edge o, "distinct"
       end
 
-      def visit_Arel_Nodes_On o
-        visit_edge o, "expr"
-      end
-
       def visit_Arel_Nodes_Values o
         visit_edge o, "expressions"
       end
@@ -80,10 +72,6 @@ module Arel
         visit_edge o, "wheres"
       end
 
-      def visit_Arel_Nodes_UnqualifiedColumn o
-        visit_edge o, "attribute"
-      end
-
       def unary o
         visit_edge o, "expr"
       end
diff --git a/lib/arel/visitors/mysql.rb b/lib/arel/visitors/mysql.rb
index 143b4d36f4..ace8fb0979 100644
--- a/lib/arel/visitors/mysql.rb
+++ b/lib/arel/visitors/mysql.rb
@@ -25,7 +25,7 @@ module Arel
           ("SET #{o.values.map { |value| visit value }.join ', '}" unless o.values.empty?),
           ("WHERE #{o.wheres.map { |x| visit x }.join ' AND '}" unless o.wheres.empty?),
           ("ORDER BY #{o.orders.map { |x| visit x }.join(', ')}" unless o.orders.empty?),
-          ("LIMIT #{o.limit}" if o.limit),
+          ("LIMIT #{visit o.limit}" if o.limit),
         ].compact.join ' '
       end
 
diff --git a/lib/arel/visitors/postgresql.rb b/lib/arel/visitors/postgresql.rb
index 553ee91bf9..01fbda75b9 100644
--- a/lib/arel/visitors/postgresql.rb
+++ b/lib/arel/visitors/postgresql.rb
@@ -17,7 +17,7 @@ module Arel
           [
             "SELECT * FROM (#{sql}) AS id_list",
             "ORDER BY #{aliased_orders(o.orders).join(', ')}",
-            ("LIMIT #{o.limit}" if o.limit),
+            ("LIMIT #{visit o.limit}" if o.limit),
             (visit(o.offset) if o.offset),
           ].compact.join ' '
         else
diff --git a/lib/arel/visitors/to_sql.rb b/lib/arel/visitors/to_sql.rb
index f4c529bf92..5446298189 100644
--- a/lib/arel/visitors/to_sql.rb
+++ b/lib/arel/visitors/to_sql.rb
@@ -109,7 +109,7 @@ module Arel
         [
           o.cores.map { |x| visit_Arel_Nodes_SelectCore x }.join,
           ("ORDER BY #{o.orders.map { |x| visit x }.join(', ')}" unless o.orders.empty?),
-          ("LIMIT #{o.limit}" if o.limit),
+          ("LIMIT #{visit o.limit}" if o.limit),
           (visit(o.offset) if o.offset),
           (visit(o.lock) if o.lock),
         ].compact.join ' '