Question

我正在尝试评估数组中的ST_WITHIN，但我无法在google上找到解决方案，然后我正在尝试寻求帮助

我附上了我的代码，我的目标是从一个存放围栏的桌子上获取围栏，每个人都获得一个位置纬度经度与我的围栏比较并知道这是否进入这个围栏

CREATE OR REPLACE FUNCTION insert_position(
    _imei character varying(8),
    _datagram text,
    _created timestamp with time zone,
    _updated timestamp with time zone,
    _date_time_process timestamp with time zone,
    _latitude numeric,
    _longitude numeric,
    _course integer,
    _speed integer,
    _mileage integer,
    _gps_signal integer,
    _gsm_signal integer,
    _alarm_status boolean,
    _gps_status boolean,
    _vehicle_status boolean,
    _alarm_over_speed boolean,
    _other text
    ) RETURNS integer AS $$ 
DECLARE
    device_id integer;
BEGIN
    SELECT gpstracking_devices.id INTO device_id FROM gpstracking_devices WHERE gpstracking_devices.imei = $1;
    INSERT INTO gpstracking_device_tracks (device_id, imei, datagram, created, updated, date_time_process, latitude, longitude, course, speed, mileage, gps_signal, gsm_signal, alarm_status, gps_status, vehicle_status, alarm_over_speed, other, point) 
    VALUES (device_id, $1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, ST_Transform(ST_SetSRID(ST_MakePoint($6, $7), 4326),26913));
    SELECT geometry WHERE gpstracking_fences.id in ( SELECT gpstracking_fences_devices.fence_id from gpstracking_fences_devices WHERE gpstracking_fences_devices.device_id = device_id)

    -- I need to iterate this geometris into a ST_WITHIN

    RETURN device_id;
END
$$ 
LANGUAGE plpgsql VOLATILE SECURITY DEFINER;

Answer 1

我不确定我是否完全理解您的用例，但也许您可以使用Postgres LOOP，如下所示：

CREATE OR REPLACE FUNCTION insert_position(
  -- your args 
DECLARE
 device_id integer;
 intersect_count
BEGIN
    --
    -- initial logic
    --
    FOR mygeom IN SELECT geometry WHERE gpstracking_fences.id in ( SELECT gpstracking_fences_devices.fence_id from gpstracking_fences_devices WHERE gpstracking_fences_devices.device_id = device_id)
    LOOP
      IF  (ST_Within(ST_GeomFromText('POINT(-1.234 4.321)', YOUR_SRID), mygeom))  THEN
         intersect_count = intersect_count+1;
      END IF;
    END LOOP;
    RETURN device_id;
END
-- ....

栅栏阵列上的ST_DWITHIN

1 个答案: