| Field | Description | Type | Null | Key | Default | Extra |
| ------------------ | -------------------------------------- | -------------- | ---- | --- | ------- | -------------- |
| id | sequential ID | int unsigned | NO | PRI | NULL | auto_increment |
-| activity-id | id of the incoming activity | varbinary(255) | YES | | NULL | |
-| object-id | | varbinary(255) | YES | | NULL | |
-| in-reply-to-id | | varbinary(255) | YES | | NULL | |
-| conversation | | varbinary(255) | YES | | NULL | |
+| activity-id | id of the incoming activity | varbinary(383) | YES | | NULL | |
+| object-id | | varbinary(383) | YES | | NULL | |
+| in-reply-to-id | | varbinary(383) | YES | | NULL | |
+| conversation | | varbinary(383) | YES | | NULL | |
| type | Type of the activity | varchar(64) | YES | | NULL | |
| object-type | Type of the object activity | varchar(64) | YES | | NULL | |
| object-object-type | Type of the object's object activity | varchar(64) | YES | | NULL | |