Delphi 为TClientdataset定义结果集，并增加记录 

procedure addDefsFieldsForCDS(aDataSet: TClientDataSet);
begin
  aDataSet.Data := null;
  aDataSet.FieldDefs.Clear;
  aDataSet.FieldDefs.Add('ID', ftString, 100);
  aDataSet.FieldDefs.Add('CODE', ftString, 100);
  aDataSet.FieldDefs.Add('NEW_L_CODE', ftString, 100);
  aDataSet.FieldDefs.Add('OLD_L_CODE', ftString, 100);
  aDataSet.CreateDataSet;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
 addDefsFieldsForCDS(ClientDataSet1);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  ClientDataSet1.Append;
  ClientDataSet1.FieldByName('ID').AsString := '100';
  ClientDataSet1.FieldByName('CODE').AsString := '100';
  ClientDataSet1.FieldByName('NEW_L_CODE').AsString := '100';
  ClientDataSet1.FieldByName('OLD_L_CODE').AsString := '100';
  ClientDataSet1.Post;
end;