From d7a65cb7ca36eb72388737b0c64f9b521d6ff5c2 Mon Sep 17 00:00:00 2001
From: "grafana-delivery-bot[bot]"
 <132647405+grafana-delivery-bot[bot]@users.noreply.github.com>
Date: Thu, 3 Aug 2023 08:19:09 +0100
Subject: [PATCH] [v10.1.x] Tempo: Only get span_names when they are in the
 response (#72785)

Tempo: Only get span_names when they are in the response (#72663)

* Only get span names when they are in the response

* Find span_name field/labels

(cherry picked from commit b4c55765fe8ad5bf37a28384c5a7bc732bb9b1e9)

Co-authored-by: Joey <90795735+joey-grafana@users.noreply.github.com>
---
 public/app/plugins/datasource/tempo/datasource.ts | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/public/app/plugins/datasource/tempo/datasource.ts b/public/app/plugins/datasource/tempo/datasource.ts
index bc58422a6fb..27e906e0609 100644
--- a/public/app/plugins/datasource/tempo/datasource.ts
+++ b/public/app/plugins/datasource/tempo/datasource.ts
@@ -11,6 +11,7 @@ import {
   DataSourceApi,
   DataSourceInstanceSettings,
   dateTime,
+  Field,
   FieldType,
   isValidGoDuration,
   LoadingState,
@@ -650,14 +651,16 @@ function errorAndDurationQuery(
   let durationsBySpanName: string[] = [];
 
   let labels = [];
-  if (request.app === CoreApp.Explore) {
-    if (rateResponse.data[0][0]?.fields[1]?.values) {
-      labels = rateResponse.data[0][0]?.fields[1]?.values;
+  if (rateResponse.data[0][0] && request.app === CoreApp.Explore) {
+    const spanNameField = rateResponse.data[0][0].fields.find((field: Field) => field.name === 'span_name');
+    if (spanNameField && spanNameField.values) {
+      labels = spanNameField.values;
     }
   } else if (rateResponse.data[0]) {
     rateResponse.data[0].map((df: DataFrame) => {
-      if (df.fields[1]?.labels && df.fields[1]?.labels['span_name']) {
-        labels.push(df.fields[1]?.labels['span_name']);
+      const spanNameLabels = df.fields.find((field: Field) => field.labels?.['span_name']);
+      if (spanNameLabels) {
+        labels.push(spanNameLabels.labels?.['span_name']);
       }
     });
   }