CREATE TABLE IF NOT EXISTS material_consumption_snapshots (
    timestamp timestamptz NOT NULL,
    calculation_id text NOT NULL,
    machine_id text NOT NULL,
    production_order text NOT NULL,
    run_id text NOT NULL,
    consumption_kg double precision NOT NULL,
    PRIMARY KEY (calculation_id, machine_id, production_order, timestamp)
);

-- Machine time series across orders; the primary key covers a specific order.
CREATE INDEX IF NOT EXISTS material_consumption_snapshots_machine_time_idx
    ON material_consumption_snapshots (calculation_id, machine_id, timestamp);