How to set multiple expression by oal

[807801002]

Please answer these questions before submitting your issue.

• Why do you submit this issue?
• Question or discussion
• Bug
• Requirement
• Feature or performance improvement

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Question

• What do you want to know?
  https://github.com/apache/skywalking/blob/master/docs/en/concepts-and-designs/oal.md
  The documents says that the filter expressions support linking by and, or and (...),I set the expression like: service_relation_redis_client_cpm = from(ServiceRelation.*).filter(detectPoint == DetectPoint.CLIENT and componentId == 7).cpm(); but it is failed.
  

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Bug

• Which version of SkyWalking, OS, and JRE?

• Which company or project?

• What happened?
  If possible, provide a way to reproduce the error. e.g. demo application, component version.

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Requirement or improvement

• Please describe your requirements or improvement suggestions.

[wu-sheng]

Filter part should be write as a chain mode according to the grammar tree.

service_relation_redis_client_cpm = from(ServiceRelation.*).filter(detectPoint == DetectPoint.CLIENT).filter(componentId == 7).cpm()

[807801002]

Which field can be used at filter()？I thought all fields in org.apache.skywalking.oap.server.core.source.ServiceRelation can be used to the filter expression for "from(ServiceRelation.*)".But the "componentId == 7" is error. which is a field at ServiceRelation.

[love720720]

@wu-sheng
Is there support for the OR expression syntax now? I expect to exclude the number of 404 HTTP requests in service_sla. However, I do not wish to exclude non-HTTP requests. How can this be achieved?

[wu-sheng]

There isn't or support. But usually we only tracing http, how do you trace others?

[love720720]

There isn't or support. But usually we only tracing http, how do you trace others?

Sorry, I was mistaken in my understanding.