如何配料ESPER EPL事件

Question

我正在尝试批处理这样的通知事件，并且我正在通过一个通知事件获取一个Notifications事件。谁能帮我？

提前提醒。

相关声明

INSERT INTO Notification SELECT d.id as id,a.stationId as stationId,d.firebaseToken as firebaseToken, d.position as devicePos,a.location as stationPos,a.levelNumber as levelNumber,a.levelName as levelName FROM AirQualityAlert.win:time(3sec) as a, device.win:time(3sec) as d WHERE d.position.distance(a.location) < 300 

INSERT INTO Notifications SELECT * FROM Notification.std:groupwin(id).win:time_batch(20sec) for grouped_delivery(id) 

Answer 1

该解决方案能够提供每“身份证”包含与事件列表中的列一行。

create context Batch20Sec start @now end after 20 sec; 
context Batch20Sec select id, window(*) as data 
from Notifications#keepall 
group by id 
output all when terminated; 

我认为这就是你想要的。