message: [BUGFIX]: Fixing dttm_sql_literal to use python_date_format when specified.
diff: @@ -104,18 +104,19 @@ class TableColumn(Model, BaseColumn):
  If database_expression is not empty, the internal dttm
  will be parsed as the sql sentence for the database to convert
  """
  -
  - tf = self.python_date_format or '%Y-%m-%d %H:%M:%S.%f'
  + tf = self.python_date_format
  if self.database_expression:
  return self.database_expression.format(dttm.strftime('%Y-%m-%d %H:%M:%S'))
  - elif tf == 'epoch_s':
  + elif tf:
  + if tf == 'epoch_s':
  return str((dttm - datetime(1970, 1, 1)).total_seconds())
  elif tf == 'epoch_ms':
  return str((dttm - datetime(1970, 1, 1)).total_seconds() * 1000.0)
  + return "'{}'".format(dttm.strftime(tf))
  else:
  s = self.table.database.db_engine_spec.convert_dttm(
  self.type or '', dttm)
  - return s or "'{}'".format(dttm.strftime(tf))
  + return s or "'{}'".format(dttm.strftime('%Y-%m-%d %H:%M:%S.%f'))
  class SqlMetric(Model, BaseMetric):
  