From c8543a36de0c059b01ceb322b1e6501a912288eb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=B8ren=20Louv-Jansen?= <soren.louv@elastic.co>
Date: Tue, 7 Jan 2025 15:35:38 +0100
Subject: [PATCH] [Obs AI Assistant] Use `sparse_vector` instead of
 `text_expansion` (#202891)

Closes #202313

The [text expansion
query](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-text-expansion-query.html)
was deprecated in 8.15 and is being replaced by [sparse vector
query](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-sparse-vector-query.html).
---
 .../recall_from_search_connectors.ts                  | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/x-pack/platform/plugins/shared/observability_solution/observability_ai_assistant/server/service/knowledge_base_service/recall_from_search_connectors.ts b/x-pack/platform/plugins/shared/observability_solution/observability_ai_assistant/server/service/knowledge_base_service/recall_from_search_connectors.ts
index 5abd6d850a8f4..b8a0a7d9267bc 100644
--- a/x-pack/platform/plugins/shared/observability_solution/observability_ai_assistant/server/service/knowledge_base_service/recall_from_search_connectors.ts
+++ b/x-pack/platform/plugins/shared/observability_solution/observability_ai_assistant/server/service/knowledge_base_service/recall_from_search_connectors.ts
@@ -155,12 +155,11 @@ async function recallFromLegacyConnectors({
         bool: {
           should: [
             {
-              text_expansion: {
-                [vectorField]: {
-                  model_text: text,
-                  model_id: modelId,
-                  boost,
-                },
+              sparse_vector: {
+                field: vectorField,
+                query: text,
+                inference_id: modelId,
+                boost,
               },
             },
           ],