ALTER TABLE attempts
    DROP CONSTRAINT attempts_state_check,
    DROP CONSTRAINT attempts_state_timestamps_check,
    ADD COLUMN stopped_at TIMESTAMPTZ,
    ADD COLUMN committed_at TIMESTAMPTZ,
    ADD COLUMN failure JSONB,
    ADD CONSTRAINT attempts_state_check CHECK (
        state IN ('authorized', 'executing', 'reaped', 'stopped', 'committed')
    ),
    ADD CONSTRAINT attempts_state_timestamps_check CHECK (
        (state = 'authorized' AND executing_at IS NULL AND reaped_at IS NULL
            AND stopped_at IS NULL AND committed_at IS NULL)
        OR (state = 'executing' AND executing_at IS NOT NULL AND reaped_at IS NULL
            AND stopped_at IS NULL AND committed_at IS NULL)
        OR (state = 'reaped' AND executing_at IS NULL AND reaped_at IS NOT NULL
            AND stopped_at IS NULL AND committed_at IS NULL)
        OR (state = 'stopped' AND executing_at IS NOT NULL AND reaped_at IS NULL
            AND stopped_at IS NOT NULL AND committed_at IS NULL)
        OR (state = 'committed' AND executing_at IS NOT NULL AND reaped_at IS NULL
            AND stopped_at IS NULL AND committed_at IS NOT NULL)
    );

ALTER TABLE jobs
    ADD COLUMN cancel_requested BOOLEAN NOT NULL DEFAULT FALSE,
    ADD COLUMN resolved_source JSONB,
    ADD COLUMN checkpoint JSONB,
    ADD COLUMN committed_result JSONB,
    ADD COLUMN failure JSONB,
    ADD COLUMN terminal_at TIMESTAMPTZ,
    ADD CONSTRAINT jobs_terminal_projection_check CHECK (
        ((phase = 'succeeded') = (committed_result IS NOT NULL))
        AND ((phase = 'failed') = (failure IS NOT NULL))
        AND ((phase IN ('succeeded', 'failed', 'cancelled')) = (terminal_at IS NOT NULL))
        AND (committed_result IS NULL OR failure IS NULL)
    );