class ActiveRecord::ConnectionAdapters::SchemaCache

def self.load_from(filename)
  return unless File.file?(filename)
  read(filename) do |file|
    if filename.include?(".dump")
      Marshal.load(file)
    else
      if YAML.respond_to?(:unsafe_load)
        YAML.unsafe_load(file)
      else
        YAML.load(file)
      end
    end
  end
end