code: def _get_dbal_column_type(self, type_):
          
          type_ = type_.lower()
  
          if type_ == "enum":
              return "string"
  
          return super(PostgresSchemaGrammar, self)._get_dbal_column_type(type_)
docs: Get the dbal column type.
  
          :param type_: The fluent type
          :type type_: str
  
          :rtype: str