Checks if any tables are present in the current assets database.

        Parameters
        ----------
        txn : Transaction
            The open transaction to check in.

        Returns
        -------
        has_tables : bool
            True if any tables are present, otherwise False.

def _all_tables_present(self, txn):
        """
        Checks if any tables are present in the current assets database.

        Parameters
        ----------
        txn : Transaction
            The open transaction to check in.

        Returns
        -------
        has_tables : bool
            True if any tables are present, otherwise False.
        """
        conn = txn.connect()
        for table_name in asset_db_table_names:
            if txn.dialect.has_table(conn, table_name):
                return True
        return False