Tracing in DirectQuery

The APM module is tracing DirectQuery connector requests.
When enabled, APM produces a span tree for each request, describing all the executed sub-tasks.
These sub-tasks are tagged with additional information, such as the executed SQL query or the query id in the external database.
Each span tree can then be added to the logs or sent to a correlation server like Zipkin or simply logged.

Minimal logging

Without tracing activated, DirectQuery connector provide a minimal logging of the API and external queries.
This logging is made at the FINE level.