Grafana 变量：选择“全部”时返回所有 Elastic 文档，属性可能为空列表

Question

Take the following Lucene query:

provision_org.keyword:$provision_org

If $provision_org has the value "hello", the query returns all documents where provision_org (a list) contains the item "hello". So far so good.

If $provision_org has the value "*", the query returns all documents where provision_org (a list) contains an element.

Is there any value that I could assign to $provision_org so that all documents are returned, even those where provision_org is an empty list?

The reason I want this value is to set it as the "Custom All value" in the Grafana (multi-value) variable. Obviously what I want is to have an "All" option that effectively results in ignoring that particular variable. (I'm not really certain that the "Custom All value" is the correct way to do that.)

Answer 1

This might help:

* OR (NOT _exists_:provision_org.keyword)

Or you can use Ad hoc filter , but way to use it is quite different from variable