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我有问题。我正在使用DAS 3.0.1。在siddhi加入触发器
Trazablack是一个postgres表。
我不能让与事件Trazafiltrada联接,它是用下面的代码创建:
define trigger FiveMinTriggerStream at every 5 min;
from FiveMinTriggerStream join Trazablack as t
select t.sensorValue as sensorValue
insert into TrazaFiltrada;
但是,我想做出与其他事件不同的加盟,我用下面的代码:
from sensorStream JOIN TrazaFiltrada
on sensorStream.sensorValue==TrazaFiltrada.sensorValue
select sensorStream.meta_timestamp, sensorStream.meta_sensorName,
sensorStream.correlation_longitude, sensorStream.correlation_latitude, sensorStream.sensorValue as valor1, TrazaFiltrada.sensorValue as valor2
insert into StreamPaso;
Trazablack TrazaFiltrada sensorStream
---------- ------------- -------------
156 156 156
170 170
85 85
我的问题是这个查询是空的。为什么?