From 6cf36acd5352c6b2b5968c10327c79b888cd9a04 Mon Sep 17 00:00:00 2001
From: TomyLobo <tomylobo@nurfuerspam.de>
Date: Thu, 21 Nov 2019 20:25:42 +0100
Subject: [PATCH] Optimize AbstractProductQuery#getSingleResult

Also brings the method in line with the spec for some in-memory databases like HSQL.
---
 .../query/internal/AbstractProducedQuery.java        | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/hibernate-core/src/main/java/org/hibernate/query/internal/AbstractProducedQuery.java b/hibernate-core/src/main/java/org/hibernate/query/internal/AbstractProducedQuery.java
index 76dd6f77be..15e69a7104 100644
--- a/hibernate-core/src/main/java/org/hibernate/query/internal/AbstractProducedQuery.java
+++ b/hibernate-core/src/main/java/org/hibernate/query/internal/AbstractProducedQuery.java
@@ -1572,10 +1572,16 @@ public abstract class AbstractProducedQuery<R> implements QueryImplementor<R> {
 	public R getSingleResult() {
 		try {
 			final List<R> list = list();
-			if ( list.size() == 0 ) {
-				throw new NoResultException( "No entity found for query" );
+			switch ( list.size() ) {
+				case 0:
+					throw new NoResultException( "No entity found for query" );
+
+				case 1:
+					return list.get( 0 );
+
+				default:
+					throw new NonUniqueResultException( list.size() );
 			}
-			return uniqueElement( list );
 		}
 		catch ( HibernateException e ) {
 			throw getExceptionConverter().convert( e, getLockOptions() );