ALTER TABLE logbook ADD COLUMN "steering_person" INTEGER NOT NULL DEFAULT 0 REFERENCES user(id);
UPDATE logbook SET steering_person = shipmaster;
CREATE TABLE "logbook_temp" (
	"id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
	"boat_id" INTEGER NOT NULL REFERENCES boat(id),
	"shipmaster" INTEGER NOT NULL REFERENCES user(id),
	"steering_person" INTEGER NOT NULL DEFAULT 1 REFERENCES user(id),
	"shipmaster_only_steering" boolean not null,
	"departure" datetime not null,
	"arrival" datetime,
	"destination" text,
	"distance_in_km" integer,
	"comments" text,
	"logtype" INTEGER REFERENCES logbook_type(id)
);
INSERT INTO logbook_temp(id, boat_id, shipmaster, shipmaster_only_steering, departure, arrival, destination, distance_in_km, comments, logtype) SELECT id, boat_id, shipmaster, shipmaster_only_steering, COALESCE(departure, '2000-01-01 00:00:00'), arrival, destination, distance_in_km, comments, logtype FROM logbook;
DROP TABLE logbook;
ALTER TABLE logbook_temp RENAME TO logbook;

INSERT INTO rower(rower_id, logbook_id) SELECT shipmaster, id FROM logbook;
