Question2Answer query failed:

(SELECT '0' AS selectkey, qa_posts.postid, qa_posts.categoryid, qa_posts.type, LEFT(qa_posts.type, 1) AS basetype, INSTR(qa_posts.type, '_HIDDEN')>0 AS hidden, qa_posts.acount, qa_posts.selchildid, qa_posts.closedbyid, qa_posts.upvotes, qa_posts.downvotes, qa_posts.netvotes, qa_posts.views, qa_posts.hotness, qa_posts.flagcount, qa_posts.title, qa_posts.tags, UNIX_TIMESTAMP(qa_posts.created) AS created, qa_categories.title AS categoryname, qa_categories.backpath AS categorybackpath, qa_posts.userid, qa_posts.cookieid, INET_NTOA(qa_posts.createip) AS createip, qa_userpoints.points, score, matchparts, NULL AS pageid, NULL AS flags, NULL AS permit, NULL AS nav, NULL AS position, NULL AS heading, NULL AS widgetid, NULL AS place FROM qa_posts LEFT JOIN qa_categories ON qa_categories.categoryid=qa_posts.categoryid LEFT JOIN qa_userpoints ON qa_posts.userid=qa_userpoints.userid JOIN (SELECT questionid, SUM(score)+2*(LOG(10000)*(qa_posts.hotness-(SELECT MIN(hotness) FROM qa_posts WHERE type='Q'))/((SELECT MAX(hotness) FROM qa_posts WHERE type='Q')-(SELECT MIN(hotness) FROM qa_posts WHERE type='Q')))+LOG(questionid)/1000000 AS score, GROUP_CONCAT(CONCAT_WS(':', matchposttype, matchpostid, ROUND(score,3))) AS matchparts FROM ((SELECT postid AS questionid, LOG(10000/titlecount) AS score, 'Q' AS matchposttype, postid AS matchpostid FROM qa_titlewords JOIN qa_words ON qa_titlewords.wordid=qa_words.wordid WHERE word IN ('samsung','galaxy','s','duos') AND titlecount<10000) UNION ALL (SELECT questionid, (1-1/(1+count))*LOG(10000/contentcount)*(CASE qa_contentwords.type WHEN 'Q' THEN 1.0 WHEN 'A' THEN 0.5 ELSE 0.25 END) AS score, qa_contentwords.type AS matchposttype, qa_contentwords.postid AS matchpostid FROM qa_contentwords JOIN qa_words ON qa_contentwords.wordid=qa_words.wordid WHERE word IN ('samsung','galaxy','s','duos') AND contentcount<10000) UNION ALL (SELECT postid AS questionid, 2*LOG(10000/tagwordcount) AS score, 'Q' AS matchposttype, postid AS matchpostid FROM qa_tagwords JOIN qa_words ON qa_tagwords.wordid=qa_words.wordid WHERE word IN ('samsung','galaxy','s','duos') AND tagwordcount<10000) UNION ALL (SELECT postid AS questionid, LOG(10000/qposts) AS score, 'Q' AS matchposttype, postid AS matchpostid FROM qa_posts JOIN qa_userpoints ON qa_posts.userid=qa_userpoints.userid WHERE qa_posts.userid IN ('3477','1745') AND type='Q')) x LEFT JOIN qa_posts ON qa_posts.postid=questionid GROUP BY questionid ORDER BY score DESC LIMIT 980,21) y ON qa_posts.postid=y.questionid) UNION ALL (SELECT 'pending_navpages', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, title, tags, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, pageid, flags, permit+0, nav, position, heading, NULL, NULL FROM qa_pages WHERE nav IN ('B','M','O','F') ORDER BY position) UNION ALL (SELECT 'pending_widgets', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, title, tags, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, position, NULL, widgetid, place FROM qa_widgets ORDER BY position)

Error 126: Incorrect key file for table '/tmp/#sql_996e_4.MYI'; try to repair it