case 'unanswered':
                $l_search_title = $user->lang['SEARCH_UNANSWERED'];
                $show_results = $request->variable('sr', 'topics');
                $show_results = ($show_results == 'posts') ? 'posts' : 'topics';
                $sort_by_sql['t'] = ($show_results == 'posts') ? 'p.post_time' : 't.topic_last_post_time';
                $sort_by_sql['s'] = ($show_results == 'posts') ? 'p.post_subject' : 't.topic_title';
                $sql_sort = 'ORDER BY ' . $sort_by_sql[$sort_key] . (($sort_dir == 'a') ? ' ASC' : ' DESC');

                $sort_join = ($sort_key == 'f') ? FORUMS_TABLE . ' f, ' : '';
                $sql_sort = ($sort_key == 'f') ? ' AND f.forum_id = p.forum_id ' . $sql_sort : $sql_sort;

                if ($sort_days)
                {
                    $last_post_time = 'AND p.post_time > ' . (time() - ($sort_days * 24 * 3600));
                }
                else
                {
                    $last_post_time = '';
                }

                if ($sort_key == 'a')
                {
                    $sort_join = USERS_TABLE . ' u, ';
                    $sql_sort = ' AND u.user_id = p.poster_id ' . $sql_sort;
                }
                if ($show_results == 'posts')
                {
                    $sql = "SELECT p.post_id
                        FROM $sort_join" . POSTS_TABLE . ' p, ' . TOPICS_TABLE . " t
                        WHERE t.topic_posts_approved = 1
                            AND p.topic_id = t.topic_id
                            $last_post_time
                            AND $m_approve_posts_fid_sql
                            " . ((sizeof($ex_fid_ary)) ? ' AND ' . $db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '') . "
                            $sql_sort";
                    $field = 'post_id';
                }
                else
                {
                    $sql = 'SELECT DISTINCT ' . $sort_by_sql[$sort_key] . ", p.topic_id
                        FROM $sort_join" . POSTS_TABLE . ' p, ' . TOPICS_TABLE . " t
                        WHERE t.topic_posts_approved = 1
                            AND t.topic_moved_id = 0
                            AND p.topic_id = t.topic_id
                            $last_post_time
                            AND $m_approve_topics_fid_sql
                            " . ((sizeof($ex_fid_ary)) ? ' AND ' . $db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '') . "
                        $sql_sort";
                    $field = 'topic_id';
                }