WITH subtbl(flight_id, charges, duration) AS
(SELECT flight_id, charges, duration FROM FlightExp)
SELECT * FROM TABLE (
TD_SYSFNLIB.TD_SUM_NORMALIZE_OVERLAP_MEET(NEW VARIANT_TYPE(subtbl.flight_id),
NEW VARIANT_TYPE(subtbl.charges),
subtbl.duration)
RETURNS (flight_id INT, charges FLOAT,
duration PERIOD(TIMESTAMP(6) WITH TIME ZONE))
HASH BY flight_id /* input data is redistributed on column, flight_id */
LOCAL ORDER BY flight_id, duration) /* input data is sorted on these columns */
AS DT(flight_id, charges, duration) ORDER BY 1,3;