Extension:WikibaseQualityConstraints/wbqc constraints table

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    |                |