message: [pivot] add support for  in Pivot on Druid
diff: @@ -817,6 +817,11 @@ class DruidDatasource(Model, BaseDatasource):
  """
  # TODO refactor into using a TBD Query object
  client = client or self.cluster.get_pydruid_client()
  +
  + if DTTM_ALIAS in groupby:
  + groupby.remove(DTTM_ALIAS)
  + is_timeseries = True
  +
  if not is_timeseries:
  granularity = 'all'
  inner_from_dttm = inner_from_dttm or from_dttm
  