WordPress database error Got error 134

I don’t know why I am facing following error? How to fix it?

[20-Jan-2010 13:55:01] WordPress database error Got error 134 from storage engine for query SELECT option_value FROM wp_options WHERE option_name = ‘rewrite_rules’ LIMIT 1 made by require, require_once, require_once, require_once, do_action, call_user_func_array, wps_init, update_option, get_option

thanks…