HHH-18469 Bug reproduction - java.lang.AssertionError

orm/hibernate-orm-6/pom.xml

@@ -10,7 +10,7 @@
  <properties>
  <version.com.h2database>2.3.230</version.com.h2database>
  <version.junit>4.13.2</version.junit>
- <version.org.hibernate.orm>6.5.2.Final</version.org.hibernate.orm>
+ <version.org.hibernate.orm>6.6.0.CR1</version.org.hibernate.orm>
  </properties>
 
  <dependencyManagement>
@@ -54,8 +54,8 @@
  <artifactId>maven-compiler-plugin</artifactId>
  <version>3.13.0</version>
  <configuration>
- <source>11</source>
- <target>11</target>
+ <source>17</source>
+ <target>17</target>
  </configuration>
  </plugin>
  <plugin>

orm/hibernate-orm-6/src/test/java/org/hibernate/bugs/ToOneJoinFetchTest.java

@@ -0,0 +1,47 @@
+package org.hibernate.bugs;
+
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.EntityManagerFactory;
+import jakarta.persistence.Persistence;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+public class ToOneJoinFetchTest {
+
+ private EntityManagerFactory entityManagerFactory;
+
+ @Before
+ public void init() {
+ entityManagerFactory = Persistence.createEntityManagerFactory("templatePU");
+ }
+
+ @After
+ public void destroy() {
+ entityManagerFactory.close();
+ }
+
+ @Test
+ public void testToOneAttributeJoinFetch() throws Exception {
+ EntityManager entityManager = entityManagerFactory.createEntityManager();
+ entityManager.getTransaction().begin();
+
+ //language=HQL
+ var hql = """
+ SELECT a_entity FROM org.hibernate.entities.AEntity a_entity
+ LEFT JOIN FETCH a_entity.b_entity b_entity
+ LEFT JOIN FETCH b_entity.c_entities c_entities
+ """;
+
+ var query = entityManager.createQuery(hql, List.class);
+ var res = query.getResultList();
+
+ assertEquals(0, res.size());
+ entityManager.getTransaction().commit();
+ entityManager.close();
+ }
+}

orm/hibernate-orm-6/src/test/java/org/hibernate/entities/AEntity.java

@@ -0,0 +1,23 @@
+package org.hibernate.entities;
+
+import jakarta.persistence.*;
+
+import static jakarta.persistence.GenerationType.IDENTITY;
+
+@Entity
+@Table(name = "a_entities")
+public class AEntity {
+
+ @Id
+ @Column(name = "id")
+ @GeneratedValue(strategy = IDENTITY)
+ private Long id;
+
+ @OneToOne
+ @JoinColumn(name = "b_entity_id", updatable = false, insertable = false)
+ private B2Entity b_entity;
+
+ @Column(name = "b_entity_id")
+ private Long b_entity_id;
+
+}

orm/hibernate-orm-6/src/test/java/org/hibernate/entities/B1Entity.java

@@ -0,0 +1,9 @@
+package org.hibernate.entities;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Table;
+
+@Entity
+@Table(name = "b_entities")
+public class B1Entity extends BaseBEntity {
+}

orm/hibernate-orm-6/src/test/java/org/hibernate/entities/B2Entity.java

@@ -0,0 +1,9 @@
+package org.hibernate.entities;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Table;
+
+@Entity
+@Table(name = "b_entities")
+public class B2Entity extends BaseBEntity {
+}

orm/hibernate-orm-6/src/test/java/org/hibernate/entities/BaseBEntity.java

@@ -0,0 +1,21 @@
+package org.hibernate.entities;
+
+import jakarta.persistence.*;
+
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+import static jakarta.persistence.GenerationType.IDENTITY;
+
+@MappedSuperclass
+public class BaseBEntity {
+
+ @Id
+ @Column(name = "id")
+ @GeneratedValue(strategy = IDENTITY)
+ private Long id;
+
+ @OneToMany(mappedBy = "b_entity")
+ private Set<CEntity> c_entities = new LinkedHashSet<>();
+
+}

orm/hibernate-orm-6/src/test/java/org/hibernate/entities/CEntity.java

@@ -0,0 +1,23 @@
+package org.hibernate.entities;
+
+import jakarta.persistence.*;
+
+import static jakarta.persistence.GenerationType.IDENTITY;
+
+@Entity
+@Table(name = "c_entities")
+public class CEntity {
+
+ @Id
+ @Column(name = "id")
+ @GeneratedValue(strategy = IDENTITY)
+ private Long id;
+
+ @Column(name = "b_id")
+ private Long bEntityId;
+
+ @ManyToOne
+ @JoinColumn(name = "b_id", updatable = false, insertable = false)
+ private B1Entity b_entity;
+
+}