SELECT fh.flappinghistory_id, UNIX_TIMESTAMP(fh.event_time) event_time,
  fh.event_time_usec, fh.event_type, fh.percent_state_change, fh.low_threshold,
  fh.high_threshold, o.objecttype_id, o.name1, COALESCE(o.name2, '') name2
FROM icinga_flappinghistory fh USE INDEX (PRIMARY)
INNER JOIN icinga_objects o ON o.object_id=fh.object_id
WHERE fh.flappinghistory_id BETWEEN :fromid AND :toid
AND fh.flappinghistory_id > :checkpoint -- where we were interrupted
ORDER BY fh.flappinghistory_id -- this way we know what has already been migrated from just the last row's ID
LIMIT :bulk