https://clickhouse-test-reports.s3.yandex.net/18817/9049599e367bcccd809f45af138452f965b3303a/stress_test_(undefined)/test_run.txt.out.log
if (should_start_trace(thread_local_rng))
        {
            
            query_trace_context.trace_id = random.uuid;
            query_trace_context.span_id = thread_local_rng();
            
            query_trace_context.trace_flags = 1;
        }
    }
    String query_id_to_set = query_id;
    if (query_id_to_set.empty())    
    {
        
        struct QueryUUID : Poco::UUID
        {
            QueryUUID(const char * bytes, Poco::UUID::Version version)
                : Poco::UUID(bytes, version) {}
        };
        query_id_to_set = QueryUUID(random.bytes, Poco::UUID::UUID_RANDOM).toString();
    }
    client_info.current_query_id = query_id_to_set;
}
void Context::killCurrentQuery()
{
    if (process_list_elem)
    {
        process_list_elem->cancelQuery(true);
    }
};
String Context::getDefaultFormat() const