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Extract window parameters

pull/56/head
Konstantin Gründger 2016-06-30 20:31:24 +02:00
rodzic 90911bf1b2
commit 49b8a0b81f
1 zmienionych plików z 15 dodań i 12 usunięć
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27
ogn/collect/logbook.py
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@ -48,27 +48,30 @@ def compute_takeoff_and_landing():
else: else:
aircraft_beacon_id_start = last_used_aircraft_beacon_id[0] + 1 aircraft_beacon_id_start = last_used_aircraft_beacon_id[0] + 1
# 'wo' is the window order for the sql window function
wo = and_(AircraftBeacon.device_id, AircraftBeacon.timestamp)
# make a query with current, previous and next position # make a query with current, previous and next position
sq = app.session.query( sq = app.session.query(
AircraftBeacon.id, AircraftBeacon.id,
AircraftBeacon.timestamp, AircraftBeacon.timestamp,
func.lag(AircraftBeacon.timestamp).over(order_by=and_(AircraftBeacon.device_id, AircraftBeacon.timestamp)).label('timestamp_prev'), func.lag(AircraftBeacon.timestamp).over(order_by=wo).label('timestamp_prev'),
func.lead(AircraftBeacon.timestamp).over(order_by=and_(AircraftBeacon.device_id, AircraftBeacon.timestamp)).label('timestamp_next'), func.lead(AircraftBeacon.timestamp).over(order_by=wo).label('timestamp_next'),
AircraftBeacon.location_wkt, AircraftBeacon.location_wkt,
func.lag(AircraftBeacon.location_wkt).over(order_by=and_(AircraftBeacon.device_id, AircraftBeacon.timestamp)).label('location_wkt_prev'), func.lag(AircraftBeacon.location_wkt).over(order_by=wo).label('location_wkt_prev'),
func.lead(AircraftBeacon.location_wkt).over(order_by=and_(AircraftBeacon.device_id, AircraftBeacon.timestamp)).label('location_wkt_next'), func.lead(AircraftBeacon.location_wkt).over(order_by=wo).label('location_wkt_next'),
AircraftBeacon.track, AircraftBeacon.track,
func.lag(AircraftBeacon.track).over(order_by=and_(AircraftBeacon.device_id, AircraftBeacon.timestamp)).label('track_prev'), func.lag(AircraftBeacon.track).over(order_by=wo).label('track_prev'),
func.lead(AircraftBeacon.track).over(order_by=and_(AircraftBeacon.device_id, AircraftBeacon.timestamp)).label('track_next'), func.lead(AircraftBeacon.track).over(order_by=wo).label('track_next'),
AircraftBeacon.ground_speed, AircraftBeacon.ground_speed,
func.lag(AircraftBeacon.ground_speed).over(order_by=and_(AircraftBeacon.device_id, AircraftBeacon.timestamp)).label('ground_speed_prev'), func.lag(AircraftBeacon.ground_speed).over(order_by=wo).label('ground_speed_prev'),
func.lead(AircraftBeacon.ground_speed).over(order_by=and_(AircraftBeacon.device_id, AircraftBeacon.timestamp)).label('ground_speed_next'), func.lead(AircraftBeacon.ground_speed).over(order_by=wo).label('ground_speed_next'),
AircraftBeacon.altitude, AircraftBeacon.altitude,
func.lag(AircraftBeacon.altitude).over(order_by=and_(AircraftBeacon.device_id, AircraftBeacon.timestamp)).label('altitude_prev'), func.lag(AircraftBeacon.altitude).over(order_by=wo).label('altitude_prev'),
func.lead(AircraftBeacon.altitude).over(order_by=and_(AircraftBeacon.device_id, AircraftBeacon.timestamp)).label('altitude_next'), func.lead(AircraftBeacon.altitude).over(order_by=wo).label('altitude_next'),
AircraftBeacon.device_id, AircraftBeacon.device_id,
func.lag(AircraftBeacon.device_id).over(order_by=and_(AircraftBeacon.device_id, AircraftBeacon.timestamp)).label('device_id_prev'), func.lag(AircraftBeacon.device_id).over(order_by=wo).label('device_id_prev'),
func.lead(AircraftBeacon.device_id).over(order_by=and_(AircraftBeacon.device_id, AircraftBeacon.timestamp)).label('device_id_next')) \ func.lead(AircraftBeacon.device_id).over(order_by=wo).label('device_id_next')) \
.filter(between(AircraftBeacon.id, aircraft_beacon_id_start, aircraft_beacon_id_start + max_id_offset)) \ .filter(between(AircraftBeacon.id, aircraft_beacon_id_start, aircraft_beacon_id_start + max_id_offset)) \
.subquery() .subquery()