client.rb in opentelemetry-instrumentation-mysql2-0.18.0

- old
+ new

@@ -117,13 +117,13 @@
             host = (query_options[:host] || query_options[:hostname]).to_s
             port = query_options[:port].to_s
 
             attributes = {
               'db.system' => 'mysql',
-              'db.name' => database_name,
               'net.peer.name' => host,
               'net.peer.port' => port
             }
+            attributes['db.name'] = database_name if database_name
             attributes['peer.service'] = config[:peer_service] if config[:peer_service]
             attributes
           end
 
           def tracer