class ActiveRecord::ConnectionAdapters::SchemaCache

def encode_with(coder)
  reset_version!
  coder["columns"]          = @columns
  coder["primary_keys"]     = @primary_keys
  coder["data_sources"]     = @data_sources
  coder["indexes"]          = @indexes
  coder["version"]          = @version
  coder["database_version"] = database_version
end