2 files changed, 8 insertions, 0 deletions
diff --git a/lib/arel/visitors/dot.rb b/lib/arel/visitors/dot.rb
index d96cf7a6a0..f0cefeabd7 100644
--- a/lib/arel/visitors/dot.rb
+++ b/lib/arel/visitors/dot.rb
@@ -82,12 +82,14 @@ module Arel
       alias :visit_Arel_Nodes_Range             :unary
 
       def window o
+        visit_edge o, "partitions"
         visit_edge o, "orders"
         visit_edge o, "framing"
       end
       alias :visit_Arel_Nodes_Window            :window
 
       def named_window o
+        visit_edge o, "partitions"
         visit_edge o, "orders"
         visit_edge o, "framing"
         visit_edge o, "name"
diff --git a/lib/arel/visitors/to_sql.rb b/lib/arel/visitors/to_sql.rb
index 7f74ebb402..8a5e1dbf25 100644
--- a/lib/arel/visitors/to_sql.rb
+++ b/lib/arel/visitors/to_sql.rb
@@ -336,6 +336,12 @@ module Arel
 
       def visit_Arel_Nodes_Window o, collector
         collector << "("
+
+        if o.partitions.any?
+          collector << "PARTITION BY "
+          collector = inject_join o.partitions, collector, ", "
+        end
+
         if o.orders.any?
           collector << "ORDER BY "
           collector = inject_join o.orders, collector, ", "