anchor.diff:      {reply, Reply, State#state{updPlan=UpdatePlan1}};  
   handle_call({update_cursor_execute, IsSec, _SKey, Lock}, _From, #state{seco=SKey, fetchCtx=FetchCtx0, updPlan=UpdatePlan, statement=Stmt}=State) ->
       #fetchCtx{metarec=MetaRec}=FetchCtx0,
  +    ?Log("UpdateMetaRec ~p~n", [MetaRec]),
       Reply = try 
           case FetchCtx0#fetchCtx.monref of
               undefined ->    ok;
               MonitorRef ->   kill_fetch(MonitorRef, FetchCtx0#fetchCtx.pid)
           end,
  +        % ?Log("UpdatePlan ~p~n", [UpdatePlan]),
           KeyUpdateRaw = if_call_mfa(IsSec,update_tables,[SKey, UpdatePlan, Lock]),
           % ?Log("KeyUpdateRaw ~p~n", [KeyUpdateRaw]),
           case length(Stmt#statement.tables) of
  
positive.code:                     , status    ::atom()            %% undefined | waiting | fetching | done | tailing | aborted
                      , metarec   ::tuple()
                      , blockSize=100 ::integer()     %% could be adaptive
                      , remaining ::integer()         %% rows remaining to be fetched. initialized to Limit and decremented
                      , opts = [] ::list()            %% fetch options like {tail_mode,true}
                      , tailSpec  ::any()             %% compiled matchspec for master table condition (bound with MetaRec) 
                      , filter    ::any()             %% filter specification {Guard,Binds}
  
negative.code: 
  join_table(Rec, _BlockSize, Ti, Table, #scanSpec{sspec=SSpec,sbinds=SBinds,fguard=FGuard,mbinds=MBinds,fbinds=FBinds,limit=Limit}) ->
      % ?Log("Rec used for join bind ~p~n", [Rec]),
      [{MatchHead, Guard0, [Result]}] = SSpec,
      Guard1 = case Guard0 of
          [] ->   [];
          _ ->    [join_bind(Rec, hd(Guard0), SBinds)]
      end,
      MaxSize = Limit+1000,
      % ?Log("Join guard after bind : ~p~n", [Guard1]),
      case imem_meta:select(Table, [{MatchHead, Guard1, [Result]}], MaxSize) of
          {[], true} ->   [];
          {L, true} ->
              case FGuard of
  