diff --git a/log.graphqls b/log.graphqls
index 005bc6cc31ad48e572223e76186b8a161f9109be..7ffdbb891d292db312607653a4c01b3f439e0ad2 100644
--- a/log.graphqls
+++ b/log.graphqls
@@ -37,6 +37,8 @@ type Log {
 
 # Represent the conditions used for query logs
 input LogQueryCondition {
+    # Metric name of the log records
+    metricName: ID
     # The value of 0 means all services.
     serviceId: ID
     serviceInstanceId: ID