Optimize UnsignedLong range queries to convert to MatchNoDocsQuery when lower > upper bounds

CHANGELOG.md

@@ -19,6 +19,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Bump `com.gradle.develocity` from 3.17.4 to 3.17.5 ([#14397](https://github.com/opensearch-project/OpenSearch/pull/14397))
 
 ### Changed
+- unsignedLongRangeQuery now returns MatchNoDocsQuery if the lower bounds are greater than the upper bounds ([#14416](https://github.com/opensearch-project/OpenSearch/pull/14416))
 
 ### Deprecated
 

server/src/main/java/org/opensearch/index/mapper/NumberFieldMapper.java

@@ -1340,6 +1340,9 @@ public static Query unsignedLongRangeQuery(
                     u = u.subtract(BigInteger.ONE);
                 }
             }
+            if (l.compareTo(u) > 0) {
+                return new MatchNoDocsQuery();
+            }
             return builder.apply(l, u);
         }
     }

server/src/test/java/org/opensearch/index/mapper/NumberFieldTypeTests.java

@@ -73,6 +73,7 @@
 import org.opensearch.index.mapper.NumberFieldMapper.NumberType;
 import org.opensearch.index.query.QueryShardContext;
 import org.opensearch.search.MultiValueMode;
+import org.hamcrest.Matchers;
 import org.junit.Before;
 
 import java.io.ByteArrayInputStream;
@@ -673,9 +674,11 @@ public void doTestDocValueRangeQueries(NumberType type, Supplier<Number> valueSu
                 true,
                 MOCK_QSC
             );
-            assertThat(query, instanceOf(IndexOrDocValuesQuery.class));
-            IndexOrDocValuesQuery indexOrDvQuery = (IndexOrDocValuesQuery) query;
-            assertEquals(searcher.count(indexOrDvQuery.getIndexQuery()), searcher.count(indexOrDvQuery.getRandomAccessQuery()));
+            assertThat(query, Matchers.either(instanceOf(IndexOrDocValuesQuery.class)).or(instanceOf(MatchNoDocsQuery.class)));
+            if (query instanceof IndexOrDocValuesQuery) {
+                IndexOrDocValuesQuery indexOrDvQuery = (IndexOrDocValuesQuery) query;
+                assertEquals(searcher.count(indexOrDvQuery.getIndexQuery()), searcher.count(indexOrDvQuery.getRandomAccessQuery()));
+            }
         }
         reader.close();
         dir.close();