mysql> describe wbqc_constraints;
+-----------------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------------------+------------------+------+-----+---------+----------------+
| constraint_id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| constraint_guid | varbinary(63) | NO | UNI | NULL | |
| pid | int(11) | NO | MUL | NULL | |
| constraint_type_qid | varbinary(25) | NO | | NULL | |
| constraint_parameters | blob | YES | | NULL | |
+-----------------------+------------------+------+-----+---------+----------------+
