From 520538b23d9761bd2008ad19a7abcf122eb623c6 Mon Sep 17 00:00:00 2001
From: Marco Belladelli <marco@hibernate.org>
Date: Mon, 18 Sep 2023 16:11:34 +0200
Subject: [PATCH] HHH-17205 Avoid select by unique key with no referenced
 property

---
 .../metamodel/mapping/internal/ToOneAttributeMapping.java      | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/ToOneAttributeMapping.java b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/ToOneAttributeMapping.java
index 1221f5b5a0..dcef955a30 100644
--- a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/ToOneAttributeMapping.java
+++ b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/ToOneAttributeMapping.java
@@ -1728,6 +1728,9 @@ public class ToOneAttributeMapping
 	}
 
 	private boolean isSelectByUniqueKey(ForeignKeyDescriptor.Nature side) {
+		if ( referencedPropertyName == null ) {
+			return false;
+		}
 		if ( side == ForeignKeyDescriptor.Nature.KEY ) {
 			// case 1.2
 			return !foreignKeyDescriptor.getNavigableRole()