Memcache: Query failed(SELECT decode_url, headline, snippet, thumb_url, spam, twit_text,twit_user FROM ipl WHERE headline_hash = 'f8d278e3c442e0e38a29c6b1f5a6fd8d') UNION (SELECT decode_url, headline, snippet, thumb_url, spam, twit_text, twit_user FROM archive WHERE headline_hash = 'f8d278e3c442e0e38a29c6b1f5a6fd8d') limit 0,5