RivusCEP是一个Erlang库用于复杂的事件处理，使用声明式的类似SQL的DSL来定义事件流的操作。示例代码：application:start(rivus_cep).QueryStr = "define correlation2 as select ev1.eventparam1, ev2.eventparam2, sum(ev2.eventparam3) from event1 as ev1, event2 as ev2 where ev1.eventparam2 = ev2.eventparam2
