Oracle CEP 如何工作？
我对 Oracle CEP 有一些疑问。如果有人能回答他们就好了。
- 序列和关系之间有什么区别？
- 每个查询执行的频率是多少？
- 什么情况下我们必须将关系转换为序列？
- join 语句如何工作？它只适用于关系吗？
- 根据文档表和缓存事件源是拉事件源。这是否意味着执行 join 语句时将查询数据库表或缓存以查找当前关系中的每个事件？
提前致谢。
I have some questions concerning the Oracle CEP. It would be fine if somebody could answer them.
- What are the differences between sequences and relations?
- How often each query is executed?
- What are the cases when we have to convert relation to sequence?
- How the join statement works? Is it applicable only for relations?
- According to the documentation table and cache event source are pull event sources. Does it mean that the database table or cache will be queried for each event in the current relation when performing join statement?
Thanks in advance.
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我没有研究过 oracle CEP 工具，但看了这些问题，我觉得 CEP 的基础知识可能会有所帮助（如果我错了，请忽略这篇文章）。我建议（如果您还没有）首先了解 CEP 引擎的工作原理。不是对数据运行查询，而是根据静态查询评估连续数据流。
http://www.ebizq.net/topics/cep/features/9313。 html
I have not looked into oracle CEP tooling, but looking at the questions I have feeling that the basics of CEP might be helpful (excuse me if I am wrong and ignore this post). I suggest (if you have not already) to first understand how CEP engines work. Instead of running queries against the data, the continuous stream of data is evaluated against the static query.
http://www.ebizq.net/topics/cep/features/9313.html