Fix analyzed wildcard query in simple_query_string when disjunctions is empty (#114264) (#114354)

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

Closes #114185

(cherry picked from commit 6955bc1)

Co-authored-by: Halil Bülent Orhon <[email protected]>
Co-authored-by: Elastic Machine <[email protected]>

Author: 3 people

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]

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<>();

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);
     }