CREATE TABLE mailbox_permission (
	id_mailbox integer NOT NULL,
	name text NOT NULL DEFAULT '',
	is_user boolean NOT NULL,
	permission text NOT NULL DEFAULT '',
	CONSTRAINT mailbox_permission_fk FOREIGN KEY (id_mailbox)
		REFERENCES mailbox (id) MATCH FULL
		ON UPDATE CASCADE ON DELETE CASCADE
);

ALTER TABLE mailbox ADD COLUMN is_own boolean NOT NULL DEFAULT 1;
ALTER TABLE mailbox ADD COLUMN my_permission text NOT NULL DEFAULT '';
UPDATE config SET value = '7' WHERE key = 'version';