Class#parent inspection is dirt slow.

Author: metaskills

lib/active_record/connection_adapters/sqlserver/database_statements.rb

@@ -256,7 +256,7 @@ def handle_to_fields_and_rows_odbc(handle)
           end
           rows = results.inject([]) do |rows,row|
             row.each_with_index do |value, i|
-              if value.is_a? raw_connection.class.parent::TimeStamp
+              if value.respond_to?(:to_sqlserver_string)
                 row[i] = value.to_sqlserver_string
               end
             end