last.edited.or.added.php

        $query = "
    SELECT
        tn.id AS id,
        tn.skeleton_id AS skeleton_id,
        (tn.location).x as x,
        (tn.location).y as y,
        (tn.location).z AS z,
        greatest(tn.creation_time, tn.edition_time) AS most_recent,
        'treenode' as type
   FROM
        treenode tn
   WHERE
        tn.project_id = $pid AND
        tn.skeleton_id = $skid AND
        tn.user_id = $uid
   ORDER BY most_recent DESC
   LIMIT 1";