Stuff

mysql> select * from orksegment;
+----+----------+-----------------+------------+-------------+-------------+------------+------------------+---------------+----------+---------+---------------------+-----------+------------+---------+---------+---------+
| id | duration | localEntryPoint | localParty | loginString | remoteParty | tapeOffset | persianTimestamp | sessionOffset | portName | deleted | timestamp           | direction | session_id | user_id | tape_id | port_id |
+----+----------+-----------------+------------+-------------+-------------+------------+------------------+---------------+----------+---------+---------------------+-----------+------------+---------+---------+---------+
|  1 |        3 |                 | 1011       |             | 1010        |          0 |                  |             0 | USJ      |         | 2011-05-15 10:41:27 |         0 |       NULL |    NULL |    NULL |    NULL | 
|  2 |        2 |                 | 1011       |             | 1010        |          0 |                  |             0 | UST      |         | 2011-05-15 11:31:25 |         0 |       NULL |    NULL |    NULL |    NULL | 
+----+----------+-----------------+------------+-------------+-------------+------------+------------------+---------------+----------+---------+---------------------+-----------+------------+---------+---------+---------+
2 rows in set (0.00 sec)

mysql> select * from orksegment where port_id=NULL;
Empty set (0.00 sec)

mysql>