3 files changed, 17 insertions, 0 deletions
diff --git a/lib/arel/nodes/insert_statement.rb b/lib/arel/nodes/insert_statement.rb
index ed601aa841..8c6e1234d0 100644
--- a/lib/arel/nodes/insert_statement.rb
+++ b/lib/arel/nodes/insert_statement.rb
@@ -8,6 +8,12 @@ module Arel
         @columns  = []
         @values   = []
       end
+
+      def initialize_copy other
+        super
+        @columns = @columns.map { |o| o.clone }
+        @values =  @values.map  { |o| o.clone }
+      end
     end
   end
 end
diff --git a/lib/arel/nodes/select_statement.rb b/lib/arel/nodes/select_statement.rb
index 122f6275fe..50fef776f6 100644
--- a/lib/arel/nodes/select_statement.rb
+++ b/lib/arel/nodes/select_statement.rb
@@ -8,6 +8,11 @@ module Arel
         @cores = cores
         @limit = nil
       end
+
+      def initialize_copy other
+        super
+        @cores = @cores.map { |o| o.clone }
+      end
     end
   end
 end
diff --git a/lib/arel/nodes/update_statement.rb b/lib/arel/nodes/update_statement.rb
index 9f069cddb3..27e3e4e6ac 100644
--- a/lib/arel/nodes/update_statement.rb
+++ b/lib/arel/nodes/update_statement.rb
@@ -8,6 +8,12 @@ module Arel
         @wheres   = []
         @values   = []
       end
+
+      def initialize_copy other
+        super
+        @wheres = @wheres.map { |o| o.clone }
+        @values = @values.map { |o| o.clone }
+      end
     end
   end
 end