From 7ca4b317c58e9c316613c15730a3bc88388c65be Mon Sep 17 00:00:00 2001
From: "Grot (@grafanabot)" <43478413+grafanabot@users.noreply.github.com>
Date: Wed, 10 May 2023 08:41:47 +0100
Subject: [PATCH] [v9.5.x] Heatmap: Handle unsorted timestamps in calculate
 mode (#68150)

* Heatmap: Handle unsorted timestamps in calculate mode (#68111)

(cherry picked from commit f100a4c68003300e99d7b6fa86c6f5196c41596f)

* use ArrayVector

---------

Co-authored-by: Leon Sorokin <leeoniya@gmail.com>
---
 public/app/features/transformers/calculateHeatmap/heatmap.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/public/app/features/transformers/calculateHeatmap/heatmap.ts b/public/app/features/transformers/calculateHeatmap/heatmap.ts
index 9710a644256..9a77c6b69fc 100644
--- a/public/app/features/transformers/calculateHeatmap/heatmap.ts
+++ b/public/app/features/transformers/calculateHeatmap/heatmap.ts
@@ -16,6 +16,7 @@ import {
   durationToMilliseconds,
   parseDuration,
 } from '@grafana/data';
+import { isLikelyAscendingVector } from '@grafana/data/src/transformations/transformers/joinDataFrames';
 import {
   ScaleDistribution,
   HeatmapCellLayout,
@@ -326,7 +327,7 @@ export function calculateHeatmapFromData(frames: DataFrame[], options: HeatmapCa
   };
 
   const heat2d = heatmap(xs, ys, {
-    xSorted: true,
+    xSorted: isLikelyAscendingVector(new ArrayVector(xs)),
     xTime: xField.type === FieldType.time,
     xMode: xBucketsCfg.mode,
     xSize: