dump_to

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 163
      def dump_to(filename)
        clear!
        connection.data_sources.each { |table| add(table) }
        open(filename) { |f|
          if filename.include?(".dump")
            f.write(Marshal.dump(self))
          else
            f.write(YAML.dump(self))
          end
        }
      end