From 0fa991a4b95ba7daf56be2ffa45bd975b15189ac Mon Sep 17 00:00:00 2001
From: Drew Slobodnjak <60050885+drew08t@users.noreply.github.com>
Date: Thu, 25 May 2023 09:08:56 -0700
Subject: [PATCH] Prometheus: Heatmap Format with No Data (#68938)

* Prometheus: Heatmap Format with No Data

* Simplify conditional logic
---
 public/app/plugins/datasource/prometheus/result_transformer.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/public/app/plugins/datasource/prometheus/result_transformer.ts b/public/app/plugins/datasource/prometheus/result_transformer.ts
index c8240735e45..fefbd37ffe5 100644
--- a/public/app/plugins/datasource/prometheus/result_transformer.ts
+++ b/public/app/plugins/datasource/prometheus/result_transformer.ts
@@ -620,7 +620,7 @@ export function getOriginalMetricName(labelData: { [key: string]: string }) {
 }
 
 function mergeHeatmapFrames(frames: DataFrame[]): DataFrame[] {
-  if (frames.length === 0) {
+  if (frames.length === 0 || (frames.length === 1 && frames[0].length === 0)) {
     return [];
   }