anchor.diff:      select_virtual(ddSchema, MatchSpec);
   select(ddSize, MatchSpec, _Limit) ->
       select_virtual(ddSize, MatchSpec);
  +select(snapshot, MatchSpec, _Limit) ->
  +    select_virtual(snapshot, MatchSpec);
   select(Table, MatchSpec, Limit) ->
       imem_if:select(physical_table_name(Table), MatchSpec, Limit).
   
  
positive.code: 
  -include("imem.hrl").
  -include("imem_meta.hrl").
  
  %% HARD CODED CONFIGURATIONS
  
  
negative.code:     fetch_start_virtual(Pid, ddSchema, MatchSpec, BlockSize, Opts);
  fetch_start(Pid, ddSize, MatchSpec, BlockSize, Opts) ->
      fetch_start_virtual(Pid, ddSize, MatchSpec, BlockSize, Opts);
  fetch_start(Pid, snapshot, MatchSpec, BlockSize, Opts) ->
      fetch_start_virtual(Pid, snapshot, MatchSpec, BlockSize, Opts);
  fetch_start(Pid, Table, MatchSpec, BlockSize, Opts) ->
      imem_if:fetch_start(Pid, physical_table_name(Table), MatchSpec, BlockSize, Opts).
  
  