Memcache: Query failed(SELECT decode_url, headline, snippet, thumb_url, spam, twit_text,twit_user FROM ipl WHERE headline_hash = '7826019c34e221a6998a7e7a30b0e888') UNION (SELECT decode_url, headline, snippet, thumb_url, spam, twit_text, twit_user FROM archive WHERE headline_hash = '7826019c34e221a6998a7e7a30b0e888') limit 0,5