docs: def _mysql_isval(val):
      """ These types should either be ignored or have already been
      inserted into the SQL directly and dont need sqlalchemy to do
      it for us. """
      if _mysql_is_list(val):
          return False
      elif isinstance(val, mysql_col):
          return False
      elif val in [None, mysql_now, mysql_ignore]:
          return False
      return True