librenms-librenms/upgrade-scripts/fix-events.php

<?php

// MYSQL Check - FIXME
// 3 ALTERS
// 1 SELECT
// 1 UPDATE
mysql_query('ALTER TABLE `eventlog` DROP `id`');
mysql_query('ALTER TABLE `eventlog` ADD  `event_id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY  FIRST');

$s = 'SELECT * FROM eventlog';
$q = mysql_query($s);
while ($event = mysql_fetch_assoc($q)) {
    if ($event['interface']) {
        mysql_query("UPDATE `eventlog` SET `interface` = NULL, `type` = 'interface', `reference` = '".$event['interface']."' WHERE `event_id` = '".$event['event_id']."'");
    }

    $i++;
}

mysql_query('ALTER TABLE `eventlog` DROP `interface`');