CREATE TABLE principals ( id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT, uri VARBINARY(200) NOT NULL, email VARBINARY(80), displayname VARCHAR(80), UNIQUE(uri) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4; CREATE TABLE groupmembers ( id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT, principal_id INTEGER UNSIGNED NOT NULL, member_id INTEGER UNSIGNED NOT NULL, UNIQUE(principal_id, member_id) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4; INSERT INTO principals (uri,email,displayname) VALUES ('principals/admin', 'admin@example.org','Administrator'), ('principals/admin/calendar-proxy-read', null, null), ('principals/admin/calendar-proxy-write', null, null);