4 files changed, 8 insertions, 3 deletions
diff --git a/lib/arel/factory_methods.rb b/lib/arel/factory_methods.rb
index 85862c24c1..4899adfdc8 100644
--- a/lib/arel/factory_methods.rb
+++ b/lib/arel/factory_methods.rb
@@ -6,8 +6,8 @@ module Arel
       klass.new(to, constraint)
     end
 
-    def create_string_join from, to
-      create_join from, to, Nodes::StringJoin
+    def create_string_join to
+      create_join to, nil, Nodes::StringJoin
     end
 
     def create_and clauses
diff --git a/lib/arel/nodes/inner_join.rb b/lib/arel/nodes/inner_join.rb
index bf10eeac18..d09d9e819b 100644
--- a/lib/arel/nodes/inner_join.rb
+++ b/lib/arel/nodes/inner_join.rb
@@ -1,6 +1,10 @@
 module Arel
   module Nodes
     class InnerJoin < Arel::Nodes::Join
+      def initialize left, right
+        raise if right == Arel::Nodes::StringJoin
+        super
+      end
     end
   end
 end
diff --git a/lib/arel/nodes/select_statement.rb b/lib/arel/nodes/select_statement.rb
index 6881a66747..c9a0cde4e0 100644
--- a/lib/arel/nodes/select_statement.rb
+++ b/lib/arel/nodes/select_statement.rb
@@ -5,6 +5,7 @@ module Arel
       attr_accessor :limit, :orders, :lock, :offset
 
       def initialize cores = [SelectCore.new]
+        #puts caller
         @cores  = cores
         @orders = []
         @limit  = nil
diff --git a/lib/arel/visitors/to_sql.rb b/lib/arel/visitors/to_sql.rb
index b83bf2f6e7..8ceb839a6b 100644
--- a/lib/arel/visitors/to_sql.rb
+++ b/lib/arel/visitors/to_sql.rb
@@ -228,7 +228,7 @@ module Arel
       end
 
       def visit_Arel_Nodes_StringJoin o
-        "#{visit o.left} #{visit o.right}"
+        visit o.left
       end
 
       def visit_Arel_Nodes_OuterJoin o