| id | name | field1 | field2| .... | field 100|
-----------------------------------------------
| 1  | foo  | 12.2   | blue  | .... | 13.7     |
| 2  | bar  | 22.1   | green | .... | 78.0     |

| timestamp | objid | field | oldval | newval |
-----------------------------------------------
| 1234      | 1     | field2| white  | blue   |
| 1367      | 1     | field1| 11.5   | 12.2   |
| 1372      | 2     | field1| 11.9   | 22.1   |
| 1387      | 1     | name  | baz    | foo    |