ALTER TABLE settings_data
ADD COLUMN booking_enabled boolean,
ADD COLUMN booking_slot_interval integer,
ADD COLUMN booking_export_to_ya_services boolean;

UPDATE settings_data
SET booking_enabled = TRUE,
    booking_slot_interval = 30,
    booking_export_to_ya_services = FALSE;

ALTER TABLE settings_data
ALTER COLUMN booking_enabled SET NOT NULL,
ALTER COLUMN booking_slot_interval SET NOT NULL,
ALTER COLUMN booking_export_to_ya_services SET NOT NULL;
