anchor.diff:         is_binary(Doc) ->
       Values = to_insert_vals(Doc),
       {{update, _}, _} =
  -        dikdik_db:simple_query(<<"UPDATE ", Table/binary," SET data=hstore('", Values/binary,"') WHERE id='", Id/binary, "'">>).
  +        dikdik_db:simple_query(<<"UPDATE ", Table/binary," SET data=data || ('", Values/binary,"') WHERE id='", Id/binary, "'">>).
   
   %%% Internal functions
   
  
positive.code:     {{insert, _}, _} =
          dikdik_db:simple_query(<<"INSERT INTO ", Table/binary," (id, data) VALUES ('", Id/binary, "','", Values/binary,"')">>).
  
  %% Update an already existing document at Id with new document
  -spec update(Table::binary(), Id::binary(), Doc::jsx:json_text()) -> ok | {error, Error::binary()}.
  update(Table, Id, Doc)
    when is_binary(Table),
  
negative.code:         ,lookup/2
          ,insert/2
          ,insert/3
          ,replace/3
          ,update/3]).
  
  %%%===================================================================
  