INSERT INTO event_log_settings (log_id, setting_name, setting_value, setting_type) SELECT event_log.log_id, 'submissionId', event_log.assoc_id, 'string' FROM event_log WHERE event_log.message='log.author.submitted' AND NOT EXISTS (SELECT * FROM event_log_settings WHERE setting_name='submissionId' AND log_id=event_log.log_id)