Sudden db error

My blog was fine and suddenly I have got this

WordPress database error: [Got error 127 from table handler]
SELECT ID, COUNT( comment_ID ) AS ccount FROM ch_posts LEFT JOIN ch_comments ON ( comment_post_ID = ID AND comment_approved = ‘1’) WHERE post_status = ‘publish’ AND ID IN (134,133,132,131,130,129,128,127,126,125,124,123) GROUP BY ID
nothing fancy

I never did anything. Really strange. Any clue much appreciated. It looks a mess.