Method _index_columns

django/db/backends/base/schema.py:1656–1657

(self, table, columns, col_suffixes, opclasses)

            return ""

    def _index_columns(self, table, columns, col_suffixes, opclasses):
        return Columns(table, columns, self.quote_name, col_suffixes=col_suffixes)

    def _model_indexes_sql(self, model):
        """