Columns
| Column | Type | Size | Nulls | Auto | Default | Children | Parents | Comments | 
|---|---|---|---|---|---|---|---|---|
| obj_id | INT | 10 | 0 |  |  | |||
| usr_id | INT | 10 | 0 |  |  | |||
| notice | VARCHAR | 4000 | √ | null |  |  | ||
| returned | TINYINT | 3 | 0 |  |  | |||
| solved | TINYINT | 3 | √ | null |  |  | ||
| status_time | DATETIME | 19 | √ | null |  |  | ||
| sent | TINYINT | 3 | √ | null |  |  | ||
| sent_time | DATETIME | 19 | √ | null |  |  | ||
| feedback_time | DATETIME | 19 | √ | null |  |  | ||
| feedback | TINYINT | 3 | 0 |  |  | |||
| status | CHAR | 9 | √ | notgraded |  |  | 
Indexes
| Constraint Name | Type | Sort | Column(s) | 
|---|---|---|---|
| PRIMARY | Primary key | Asc/Asc | obj_id + usr_id | 
| i1_idx | Performance | Asc | usr_id | 
| ob_idx | Performance | Asc | obj_id | 
Diagram producer might be missing
No diagrams were produced please see application output for any errors