mysql> describe oc_calendars;
+---------------+-----------------+------+-----+---------+----------------+
| Field         | Type            | Null | Key | Default | Extra          |
+---------------+-----------------+------+-----+---------+----------------+
| id            | bigint unsigned | NO   | PRI | NULL    | auto_increment |
| principaluri  | varchar(255)    | YES  | MUL | NULL    |                |
| displayname   | varchar(255)    | YES  |     | NULL    |                |
| uri           | varchar(255)    | YES  |     | NULL    |                |
| synctoken     | int unsigned    | NO   |     | 1       |                |
| description   | varchar(255)    | YES  |     | NULL    |                |
| calendarorder | int unsigned    | NO   |     | 0       |                |
| calendarcolor | varchar(255)    | YES  |     | NULL    |                |
| timezone      | longtext        | YES  |     | NULL    |                |
| components    | varchar(255)    | YES  |     | NULL    |                |
| transparent   | smallint        | NO   |     | 0       |                |
+---------------+-----------------+------+-----+---------+----------------+
11 rows in set (0.00 sec)