[v9.5.x] SSE: Fix DSNode to not panic when response has empty response (#74874)

Fix DSNode to not panic when response has empty response (#74866)
2023-09-13 15:17:03 -04:00
parent 56e07f9c55
commit a76927f7a3
2 changed files with 10 additions and 1 deletions
@@ -314,7 +314,11 @@ func (dn *DSNode) Execute(ctx context.Context, now time.Time, _ mathexp.Vars, s

 	if len(filtered) == 0 {
 		responseType = "no data"
-		return mathexp.Results{Values: mathexp.Values{mathexp.NoData{Frame: response.Frames[0]}}}, nil
+		noData := mathexp.NewNoData()
+		if len(response.Frames) > 0 {
+			noData.Frame = response.Frames[0]
+		}
+		return mathexp.Results{Values: mathexp.Values{noData}}, nil
 	}

 	maybeFixerFn := checkIfSeriesNeedToBeFixed(filtered, dataSource)