ot None and join_column_names is not None:
        ensure_no_ambiguous_variables(query_text, input_column_names, join_column_names)
    input_iterator = TableIterator(input_table, input_column_names, normalize_column_names)
    output_writer = TableWriter(output_table)
    join_tables_registry = None if join_table is None else ListTableRegistry([ListTableInfo('b', join_table, join_column_names), ListTableInfo('B', join_table, join_column_names)], normalize_column_names)
    query(query_text, input_iterator, output_writer, output_warnings, join_tables_registry, user_init_code=user_init_code)
    if output_column_names is not None:
        assert len(output_column_names) == 0, '`output_column_names` param must be an empty list or None'
        if output_writer.header is not None:
            for column_name in output_writer.header:
                output_column_names.append(column_name)


def set_debug_mode(new_value=True):
    global debug_mode
    debug_mode = new_value