How to: Traces support
To show Traces you need query with format as "Traces" with following
![Format as Traces](https://github.com/Altinity/clickhouse-grafana/raw/master/.github/images/26_format_as_trace.png)

![Trace example](https://github.com/Altinity/clickhouse-grafana/raw/master/.github/images/27_traces_example.png)

For example, if `
1
` in user profile and `system.opentelemetry_span_log` is not emtpy, then you can show traces about clickhouse query execution
Look to [system.opentelemetry_span_log](https://clickhouse.com/docs/en/operations/system-tables/opentelemetry_span_log) table description for how to get data for FlameGraph
Look to [tracing dashboard example](https://github.com/Altinity/clickhouse-grafana/blob/master/docker/grafana/dashboards/flamegraph_and_tracing_support.json) for example of dashboard with FlameGraph

Tracing visualization requires following field names (case sensitive):
- `traceID` - String
- `spanID` - String
- `operationName` - String
- `parentSpanID` - String
- `serviceName` - String
- `duration` - UInt64 - duration in milliseconds
- `startTime` - UInt64 - start time in milliseconds
- `tags` - map(String, String) - tags for span
- `serviceTags` - map(String, String) - tags for service (for example 'hostName')