diff --git a/trace.graphqls b/trace.graphqls
index b3d6d6b..162c601 100644
--- a/trace.graphqls
+++ b/trace.graphqls
@@ -197,7 +197,8 @@ extend type Query {
     queryBasicTraces(condition: TraceQueryCondition, debug: Boolean): TraceBrief
     queryBasicTracesByName(condition: TraceQueryConditionByName, debug: Boolean): TraceBrief
     # Read the specific trace ID with given trace ID
-    queryTrace(traceId: ID!, debug: Boolean): Trace
+    # duration is optional, and only for BanyanDB. If not provided, means search in the last 1 day.
+    queryTrace(traceId: ID!, duration: Duration, debug: Boolean): Trace
     # Read the list of searchable keys
     queryTraceTagAutocompleteKeys(duration: Duration!):[String!]
     # Search the available value options of the given key.