Question

我想做统计，统计数据是百分比。

我有一个查询，告诉我来自一个包含多个值的流的事件数量[＆＃39; R＆＃39;，＆＃39; B＆＃39;，＆＃39; A＆＃39;，＆＃39; C＆＃39]。我想计算stream1中有多少Bs百分比。

stream1中的事件数

@info(name='Query 1')
from stream1
select count() as numEvents
insert into event_num;

B类型的事件数

@info(name='Query 2')
from stream1[value == 'B']
select count() as numBs
insert into b_num;

百分比计数：

@info(name='Query 3')
from every e1=event_num,e2=b_num
select (e2.numBs*100)/e1.numEvents as bpercent
insert into b_percent;

如果存在不是B的值，则查询3将不会增加numEvents并重新计算百分比。这意味着Bs百分比仅在B进入时计算。这不是我想要的。如果有不同的值，我希望B百分比减少。如果B进来，我希望增加。

如何以event_num或v_num是否收到新事件计算de百分比的方式生成Query3？

Answer 1

如何遵循执行计划：

@IndexBy('dummyId')
define table counterTable (dummyId int, numBs long, numAll long);

define stream stream1 (value string);

@info(name='counting bValues')
from stream1[value == 'B']
select 1 as dummyId, count() as numBs
update counterTable
    on counterTable.dummyId == dummyId;

@info(name='counting allValues')
from stream1
select 1 as dummyId, count() as numAll
update counterTable
    on counterTable.dummyId == dummyId;

@info(name='processing allValues')
from stream1 JOIN counterTable
select (counterTable.numBs * 100) / counterTable.numAll as percentage
insert into statStream;

下面，

对于每个事件，numAll计数器将递增。
如果有B值事件发生，则numB计数器将被计算在内。
将对每个活动到达进行百分比计算（无论value）

wso2 cep Siddhiql合并来自2个流的数据

1 个答案: