HKEY_OVERLOAD"  WHEN 27 THEN "LQHKEY_OVERLOAD_TC"  WHEN 28 THEN "LQHKEY_OVERLOAD_READER"  WHEN 29 THEN "LQHKEY_OVERLOAD_NODE_PEER"  WHEN 30 THEN "LQHKEY_OVERLOAD_SUBSCRIBER"  WHEN 31 THEN "LQHSCAN_SLOWDOWNS"  ELSE "<unknown>"  END AS counter_name, val FROM `ndbinfo`.`ndb$counters` c LEFT JOIN `ndbinfo`.`ndb$blocks` b ON c.block_number = b.block_number','SET @dummy = 0');