Question2Answer query failed:

(SELECT '0' AS selectkey, qa_food_posts.postid, qa_food_posts.categoryid, qa_food_posts.type, LEFT(qa_food_posts.type,1) AS basetype, INSTR(qa_food_posts.type, '_HIDDEN')>0 AS hidden, qa_food_posts.acount, qa_food_posts.selchildid, qa_food_posts.upvotes, qa_food_posts.downvotes, BINARY qa_food_posts.title AS title, BINARY qa_food_posts.tags AS tags, UNIX_TIMESTAMP(qa_food_posts.created) AS created, BINARY qa_food_posts.content AS content, BINARY qa_food_posts.notify AS notify, UNIX_TIMESTAMP(qa_food_posts.updated) AS updated, qa_food_posts.format, qa_food_posts.lastuserid, INET_NTOA(qa_food_posts.lastip) AS lastip, qa_food_posts.parentid, qa_food_posts.userid, qa_food_posts.cookieid, INET_NTOA(qa_food_posts.createip) AS createip, qa_food_userpoints.points, qa_food_users.flags, qa_food_users.level, BINARY qa_food_users.email AS email, BINARY qa_food_users.handle AS handle, qa_food_users.avatarblobid, qa_food_users.avatarwidth, qa_food_users.avatarheight, BINARY lastusers.handle AS lasthandle, NULL AS qcount, NULL AS position, NULL AS pageid, NULL AS nav FROM qa_food_posts LEFT JOIN qa_food_users ON qa_food_posts.userid=qa_food_users.userid LEFT JOIN qa_food_users AS lastusers ON qa_food_posts.lastuserid=lastusers.userid LEFT JOIN qa_food_userpoints ON qa_food_posts.userid=qa_food_userpoints.userid WHERE qa_food_posts.postid=838285) UNION ALL (SELECT '1', qa_food_posts.postid, qa_food_posts.categoryid, qa_food_posts.type, LEFT(qa_food_posts.type,1), INSTR(qa_food_posts.type, '_HIDDEN')>0, qa_food_posts.acount, qa_food_posts.selchildid, qa_food_posts.upvotes, qa_food_posts.downvotes, BINARY qa_food_posts.title, BINARY qa_food_posts.tags, UNIX_TIMESTAMP(qa_food_posts.created), BINARY qa_food_posts.content, BINARY qa_food_posts.notify, UNIX_TIMESTAMP(qa_food_posts.updated), qa_food_posts.format, qa_food_posts.lastuserid, INET_NTOA(qa_food_posts.lastip), qa_food_posts.parentid, qa_food_posts.userid, qa_food_posts.cookieid, INET_NTOA(qa_food_posts.createip), qa_food_userpoints.points, qa_food_users.flags, qa_food_users.level, BINARY qa_food_users.email, BINARY qa_food_users.handle, qa_food_users.avatarblobid, qa_food_users.avatarwidth, qa_food_users.avatarheight, BINARY lastusers.handle, NULL, NULL, NULL, NULL FROM qa_food_posts LEFT JOIN qa_food_users ON qa_food_posts.userid=qa_food_users.userid LEFT JOIN qa_food_users AS lastusers ON qa_food_posts.lastuserid=lastusers.userid LEFT JOIN qa_food_userpoints ON qa_food_posts.userid=qa_food_userpoints.userid WHERE qa_food_posts.parentid=838285) UNION ALL (SELECT '2', qa_food_posts.postid, qa_food_posts.categoryid, qa_food_posts.type, LEFT(qa_food_posts.type,1), INSTR(qa_food_posts.type, '_HIDDEN')>0, qa_food_posts.acount, qa_food_posts.selchildid, qa_food_posts.upvotes, qa_food_posts.downvotes, BINARY qa_food_posts.title, BINARY qa_food_posts.tags, UNIX_TIMESTAMP(qa_food_posts.created), BINARY qa_food_posts.content, BINARY qa_food_posts.notify, UNIX_TIMESTAMP(qa_food_posts.updated), qa_food_posts.format, qa_food_posts.lastuserid, INET_NTOA(qa_food_posts.lastip), qa_food_posts.parentid, qa_food_posts.userid, qa_food_posts.cookieid, INET_NTOA(qa_food_posts.createip), qa_food_userpoints.points, qa_food_users.flags, qa_food_users.level, BINARY qa_food_users.email, BINARY qa_food_users.handle, qa_food_users.avatarblobid, qa_food_users.avatarwidth, qa_food_users.avatarheight, BINARY lastusers.handle, NULL, NULL, NULL, NULL FROM qa_food_posts LEFT JOIN qa_food_users ON qa_food_posts.userid=qa_food_users.userid LEFT JOIN qa_food_users AS lastusers ON qa_food_posts.lastuserid=lastusers.userid LEFT JOIN qa_food_userpoints ON qa_food_posts.userid=qa_food_userpoints.userid JOIN qa_food_posts AS parents ON qa_food_posts.parentid=parents.postid WHERE parents.parentid=838285 AND (parents.type='A' OR parents.type='A_HIDDEN')) UNION ALL (SELECT '3', qa_food_posts.postid, qa_food_posts.categoryid, qa_food_posts.type, LEFT(qa_food_posts.type,1), INSTR(qa_food_posts.type, '_HIDDEN')>0, qa_food_posts.acount, qa_food_posts.selchildid, qa_food_posts.upvotes, qa_food_posts.downvotes, BINARY qa_food_posts.title, BINARY qa_food_posts.tags, UNIX_TIMESTAMP(qa_food_posts.created), NULL, NULL, NULL, NULL, NULL, NULL, NULL, qa_food_posts.userid, qa_food_posts.cookieid, INET_NTOA(qa_food_posts.createip), qa_food_userpoints.points, qa_food_users.flags, qa_food_users.level, BINARY qa_food_users.email, BINARY qa_food_users.handle, qa_food_users.avatarblobid, qa_food_users.avatarwidth, qa_food_users.avatarheight, NULL, NULL, NULL, NULL, NULL FROM qa_food_posts LEFT JOIN qa_food_users ON qa_food_posts.userid=qa_food_users.userid LEFT JOIN qa_food_userpoints ON qa_food_posts.userid=qa_food_userpoints.userid WHERE qa_food_posts.postid=(SELECT IF((parent.type='A') OR (parent.type='A_HIDDEN'), parent.parentid, parent.postid) FROM qa_food_posts AS child LEFT JOIN qa_food_posts AS parent ON parent.postid=child.parentid WHERE child.postid=838285)) UNION ALL (SELECT '4', qa_food_posts.postid, qa_food_posts.categoryid, qa_food_posts.type, LEFT(qa_food_posts.type,1), INSTR(qa_food_posts.type, '_HIDDEN')>0, qa_food_posts.acount, qa_food_posts.selchildid, qa_food_posts.upvotes, qa_food_posts.downvotes, BINARY qa_food_posts.title, BINARY qa_food_posts.tags, UNIX_TIMESTAMP(qa_food_posts.created), NULL, NULL, NULL, NULL, NULL, NULL, NULL, qa_food_posts.userid, qa_food_posts.cookieid, INET_NTOA(qa_food_posts.createip), qa_food_userpoints.points, qa_food_users.flags, qa_food_users.level, BINARY qa_food_users.email, BINARY qa_food_users.handle, qa_food_users.avatarblobid, qa_food_users.avatarwidth, qa_food_users.avatarheight, NULL, NULL, NULL, NULL, NULL FROM qa_food_posts LEFT JOIN qa_food_users ON qa_food_posts.userid=qa_food_users.userid LEFT JOIN qa_food_userpoints ON qa_food_posts.userid=qa_food_userpoints.userid JOIN (SELECT postid FROM qa_food_posts WHERE type=_utf8 'Q' ORDER BY rand() DESC LIMIT 0,50) y ON qa_food_posts.postid=y.postid) UNION ALL (SELECT '5', NULL, categoryid, NULL, NULL, NULL, NULL, NULL, NULL, NULL, BINARY title, BINARY tags, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, qcount, position, NULL, NULL FROM qa_food_categories ORDER BY position) UNION ALL (SELECT '_options', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, title, NULL, NULL, BINARY content, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL FROM qa_food_options) UNION ALL (SELECT '_time', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, UNIX_TIMESTAMP(NOW()), NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) UNION ALL (SELECT '_navpages', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, BINARY title, BINARY tags, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, flags, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, position, pageid, nav FROM qa_food_pages WHERE nav IN (_utf8 'B',_utf8 'M',_utf8 'O',_utf8 'F') ORDER BY position)

Error 0: