2 files changed, 13 insertions, 0 deletions
diff --git a/lib/active_relation/extensions/array.rb b/lib/active_relation/extensions/array.rb
index c07819d35f..2af5832707 100644
--- a/lib/active_relation/extensions/array.rb
+++ b/lib/active_relation/extensions/array.rb
@@ -6,4 +6,8 @@ class Array
   def to_sql(formatter = nil)
     "(" + collect { |e| e.to_sql(formatter) }.join(', ') + ")"
   end
+  
+  def predicate_sql
+    "IN"
+  end
 end
 \ No newline at end of file
diff --git a/lib/active_relation/extensions/range.rb b/lib/active_relation/extensions/range.rb
new file mode 100644
index 0000000000..0218a0ab44
--- /dev/null
+++ b/lib/active_relation/extensions/range.rb
@@ -0,0 +1,9 @@
+class Range
+  def to_sql(formatter = nil)
+    formatter.range self.begin, self.end
+  end
+  
+  def predicate_sql
+    "BETWEEN"
+  end
+end
+\ No newline at end of file