anchor.diff:          ]
       }).
   
  +%% ------------------------------------------------------------------
  +%% @doc Delete a session.
  +%% @end
  +%% ------------------------------------------------------------------
   delete_session(#t_session{} = Session) ->
       {ok, Client} = get_cqerl_client(),
       {ok, _} = cqerl:run_query(Client, #cql_query{
  
positive.code:         )
      ", [?KEYSPACE, ?TABLE_USER]));
  
  create_table(alias) ->
      {ok, Client} = get_cqerl_client(),
      {ok, _} = cqerl:run_query(Client, io_lib:format("
  
negative.code: %% Session
  %% ------------------------------------------------------------------
  
  %% ------------------------------------------------------------------
  %% @doc Insert a session.
  %% @end
  %% ------------------------------------------------------------------
  insert_session(#t_session{} = Session) ->
      {ok, Client} = get_cqerl_client(),
      {ok, _} = cqerl:run_query(Client, #cql_query{
  