From 8d79d45972d96cf92becd82f0ef7a3b18327d557 Mon Sep 17 00:00:00 2001
From: Ludovic Viaud <ludovic.viaud@gmail.com>
Date: Tue, 8 Aug 2023 15:10:31 +0200
Subject: [PATCH] Transformations: Fix partitionByValues when there is no match
 (#72981)

---
 .../transformers/partitionByValues/partitionByValues.ts      | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/public/app/features/transformers/partitionByValues/partitionByValues.ts b/public/app/features/transformers/partitionByValues/partitionByValues.ts
index 1e81bca60f0..df7a4ecfddf 100644
--- a/public/app/features/transformers/partitionByValues/partitionByValues.ts
+++ b/public/app/features/transformers/partitionByValues/partitionByValues.ts
@@ -98,6 +98,11 @@ export function partitionByValues(
   options?: PartitionByValuesTransformerOptions
 ): DataFrame[] {
   const keyFields = frame.fields.filter((f) => matcher(f, frame, [frame]))!;
+
+  if (!keyFields.length) {
+    return [frame];
+  }
+
   const keyFieldsVals = keyFields.map((f) => f.values);
   const names = keyFields.map((f) => f.name);