no schema for stratum
This table isnt part of the MPOS schema you have to create it yourself, my schema for this table is:

mysql&gt; show columns from shares;
+-----------------+--------------+------+-----+---------+----------------+
| Field           | Type         | Null | Key | Default | Extra          |
+-----------------+--------------+------+-----+---------+----------------+
| shareID         | int(11)      | NO   | PRI | NULL    | auto_increment |
| rem_host        | varchar(100) | YES  |     | NULL    |                |
| username        | varchar(100) | YES  |     | NULL    |                |
| our_result      | varchar(255) | YES  |     | NULL    |                |
| upstream_result | varchar(255) | YES  |     | NULL    |                |
| reason          | varchar(255) | YES  |     | NULL    |                |
| solution        | varchar(255) | YES  |     | NULL    |                |
+-----------------+--------------+------+-----+---------+----------------+
7 rows in set (0.00 sec)


I keep this in a seperate db to MPOS but there is no reason you cant add it manually to the MPOS table.  I will also add that while this works I'm not certain if varchar is the correct datatype to use here.