From aa8d03cb991a5612bf22335b365b4de9381a6044 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Halil=20B=C3=BClent=20Orhon?= <halilbulentorhon@gmail.com>
Date: Tue, 8 Oct 2024 21:47:37 +0300
Subject: [PATCH] Fix analyzed wildcard query in simple_query_string when
 disjunctions is empty (#114264)

This change fixes analyzed wildcard query in simple_query_string when disjunctions is empty.

Closes #114185

(cherry picked from commit 6955bc18a2e5e15f30b89191136596a605a2d808)
---
 docs/changelog/114264.yaml                    |  5 ++++
 .../search/query/SimpleQueryStringIT.java     | 26 +++++++++++++++++++
 .../search/SimpleQueryStringQueryParser.java  |  3 +++
 3 files changed, 34 insertions(+)
 create mode 100644 docs/changelog/114264.yaml

diff --git a/docs/changelog/114264.yaml b/docs/changelog/114264.yaml
new file mode 100644
index 0000000000000..fe421f6422830
--- /dev/null
+++ b/docs/changelog/114264.yaml
@@ -0,0 +1,5 @@
+pr: 114264
+summary: "Fix analyzed wildcard query in simple_query_string when disjunctions is empty"
+area: Search
+type: bug
+issues: [114185]
diff --git a/server/src/internalClusterTest/java/org/elasticsearch/search/query/SimpleQueryStringIT.java b/server/src/internalClusterTest/java/org/elasticsearch/search/query/SimpleQueryStringIT.java
index 2fe7931d64c81..35f11eb1429b4 100644
--- a/server/src/internalClusterTest/java/org/elasticsearch/search/query/SimpleQueryStringIT.java
+++ b/server/src/internalClusterTest/java/org/elasticsearch/search/query/SimpleQueryStringIT.java
@@ -582,6 +582,32 @@ public void testFieldAliasOnDisallowedFieldType() throws Exception {
         });
     }
 
+    public void testSimpleQueryStringWithAnalysisStopWords() throws Exception {
+        String mapping = Strings.toString(
+            XContentFactory.jsonBuilder()
+                .startObject()
+                .startObject("properties")
+                .startObject("body")
+                .field("type", "text")
+                .field("analyzer", "stop")
+                .endObject()
+                .endObject()
+                .endObject()
+        );
+
+        CreateIndexRequestBuilder mappingRequest = indicesAdmin().prepareCreate("test1").setMapping(mapping);
+        mappingRequest.get();
+        indexRandom(true, prepareIndex("test1").setId("1").setSource("body", "Some Text"));
+        refresh();
+
+        assertHitCount(
+            prepareSearch().setQuery(
+                simpleQueryStringQuery("the* text*").analyzeWildcard(true).defaultOperator(Operator.AND).field("body")
+            ),
+            1
+        );
+    }
+
     private void assertHits(SearchHits hits, String... ids) {
         assertThat(hits.getTotalHits().value, equalTo((long) ids.length));
         Set<String> hitIds = new HashSet<>();
diff --git a/server/src/main/java/org/elasticsearch/index/search/SimpleQueryStringQueryParser.java b/server/src/main/java/org/elasticsearch/index/search/SimpleQueryStringQueryParser.java
index 59394c0a8e6f9..5eaf79ad42bde 100644
--- a/server/src/main/java/org/elasticsearch/index/search/SimpleQueryStringQueryParser.java
+++ b/server/src/main/java/org/elasticsearch/index/search/SimpleQueryStringQueryParser.java
@@ -199,6 +199,9 @@ public Query newPrefixQuery(String text) {
         if (disjuncts.size() == 1) {
             return disjuncts.get(0);
         }
+        if (disjuncts.size() == 0) {
+            return null;
+        }
         return new DisjunctionMaxQuery(disjuncts, 1.0f);
     }