Alter Table Help

[Darin Isola]

Hi All,

Can someone please tell me how to alter this table so the field 
'summary_path' will chamge to a blob.

+--------------+-----------------------+------+-----+---------+-------+
| Field        | Type                  | Null | Key | Default | Extra |
+--------------+-----------------------+------+-----+---------+-------+
| job_status   | enum('open','closed') |      |     | open    |       |
| title        | char(50)              |      | PRI |         |       |
| summary_path | char(100)             |      |     |         |       |
| job_code     | char(50)              |      |     |         |       |
| dept_code    | char(50)              |      |     |         |       |
+--------------+-----------------------+------+-----+---------+-------+ 


Thanks alot!

Darin