1 files changed, 18 insertions, 3 deletions
diff --git a/lib/arel/visitors/bind_visitor.rb b/lib/arel/visitors/bind_visitor.rb
index 0f1e38315b..c336e87395 100644
--- a/lib/arel/visitors/bind_visitor.rb
+++ b/lib/arel/visitors/bind_visitor.rb
@@ -6,19 +6,34 @@ module Arel
         super
       end
 
-      def accept node, &block
+      def accept node, collector, &block
         @block = block if block_given?
         super
       end
 
       private
-      def visit_Arel_Nodes_BindParam o
+
+      def visit_Arel_Nodes_Assignment o, collector
+        if o.right.is_a? Arel::Nodes::BindParam
+          collector = visit o.left, collector
+          collector << " = "
+          visit o.right, collector
+        else
+          super
+        end
+      end
+
+      def visit_Arel_Nodes_BindParam o, collector
         if @block
-          @block.call
+          val = @block.call
+          if String === val
+            collector << val
+          end
         else
           super
         end
       end
+
     end
   end
 end