From 4c09bc938ce1654d0acf40d9a1f881a04ac8b709 Mon Sep 17 00:00:00 2001
From: Julia Rechkunova <julia.rechkunova@elastic.co>
Date: Tue, 23 Apr 2024 14:55:30 +0200
Subject: [PATCH] [UnifiedHistogram] Improve breakdown chart when values for
 the field are missing (#181013)

## Summary

This PR changes Lens configuration to visualize data even if values for
the "Breakdown by" field are not provided.

Before:
<img width="600" alt="Screenshot 2024-04-17 at 11 34 41"
src="https://github.com/elastic/kibana/assets/1415710/02957896-4d5b-4a99-b09b-076ee962c219">

After:
<img width="600" alt="Screenshot 2024-04-17 at 11 35 13"
src="https://github.com/elastic/kibana/assets/1415710/a5a89785-71b8-4d77-9423-df573cc21d17">
---
 .../public/services/lens_vis_service.attributes.test.ts         | 2 +-
 .../unified_histogram/public/services/lens_vis_service.ts       | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/plugins/unified_histogram/public/services/lens_vis_service.attributes.test.ts b/src/plugins/unified_histogram/public/services/lens_vis_service.attributes.test.ts
index 3703439b32fca..2e4f5a873aeb7 100644
--- a/src/plugins/unified_histogram/public/services/lens_vis_service.attributes.test.ts
+++ b/src/plugins/unified_histogram/public/services/lens_vis_service.attributes.test.ts
@@ -240,7 +240,7 @@ describe('LensVisService attributes', () => {
                         "label": "Top 3 values of extension",
                         "operationType": "terms",
                         "params": Object {
-                          "missingBucket": false,
+                          "missingBucket": true,
                           "orderBy": Object {
                             "columnId": "count_column",
                             "type": "column",
diff --git a/src/plugins/unified_histogram/public/services/lens_vis_service.ts b/src/plugins/unified_histogram/public/services/lens_vis_service.ts
index a78d3859da441..a7f75f91d0430 100644
--- a/src/plugins/unified_histogram/public/services/lens_vis_service.ts
+++ b/src/plugins/unified_histogram/public/services/lens_vis_service.ts
@@ -378,7 +378,7 @@ export class LensVisService {
             },
             orderDirection: 'desc',
             otherBucket: true,
-            missingBucket: false,
+            missingBucket: true,
             parentFormat: {
               id: 'terms',
             },