You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 20210514142828_add_site_size.rb
    path of file: ./repos/tiddlyhost/rails/db/migrate
    
    the code of the file until where you have to start completion: class AddSite
    
  def change
    # This will be the uncompressed byte size. The compressed
    # byte size is already available via the blob record.
    #
    add_column :sites, :raw_byte_size, :integer
    add_column :tspot_sites, :raw_byte_size, :integer
  end