Requirement

As a user I want to be able to search traces not only by span tags, but also by first class fields such as span.status, scope.name, etc.

Problem

The only top-level fields the search supports today are service/operation name and the timestamp/duration.

Proposal

Extend the internal Search API to allow specifying more first-class fields in designated fields of the search params, rather than via Tags map.

The UI experience can remain the same, we can instruct the users via tooltip that span.* and scope.* and resource.* tags will be directed to the corresponding parts of the trace, and some specific names like span.status will refer to the first-class field rather than a status attribute.

Open questions

No response