HHH-15449 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/batchfetch/EagerManyToOneStreamTest.java

@@ -0,0 +1,220 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.orm.test.batchfetch;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import org.hibernate.Hibernate;
+import org.hibernate.cfg.AvailableSettings;
+import org.hibernate.query.spi.QueryImplementor;
+
+import org.hibernate.testing.jdbc.SQLStatementInspector;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.hibernate.testing.orm.junit.ServiceRegistry;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.hibernate.testing.orm.junit.Setting;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+@DomainModel(
+		annotatedClasses = { EagerManyToOneStreamTest.Child.class, EagerManyToOneStreamTest.Parent.class }
+)
+@SessionFactory(statementInspectorClass = SQLStatementInspector.class)
+@ServiceRegistry(settings = @Setting(name = AvailableSettings.DEFAULT_BATCH_FETCH_SIZE, value = "2"))
+@JiraKey("HHH-15449")
+public class EagerManyToOneStreamTest {
+
+	public static final String FIELD_VALUE = "a field";
+	public static final String FIELD_VALUE_2 = "a second field";
+
+	@BeforeEach
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Parent parent = new Parent( FIELD_VALUE );
+					session.persist( parent );
+					session.persist( new Child( parent ) );
+					Parent parent2 = new Parent( FIELD_VALUE_2 );
+					session.persist( parent2 );
+					session.persist( new Child( parent2 ) );
+				}
+		);
+	}
+
+	@AfterEach
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					session.createMutationQuery( "delete from Child" ).executeUpdate();
+					session.createMutationQuery( "delete from Parent" ).executeUpdate();
+				}
+		);
+	}
+
+	@Test
+	public void testGetResultStreamCollectSingleResult(SessionFactoryScope scope) {
+		final SQLStatementInspector sqlStatementInterceptor = (SQLStatementInspector) scope.getStatementInspector();
+		sqlStatementInterceptor.clear();
+		scope.inTransaction(
+				session -> {
+					QueryImplementor<Child> query = session
+							.createQuery( "select c from Child as c where c.parent.someField=:someField", Child.class )
+							.setParameter( "someField", FIELD_VALUE );
+					Stream<Child> resultStream = query.getResultStream();
+
+					List<Child> children = resultStream.collect( Collectors.toList() );
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 2 );
+
+					assertThat( children.size() ).isEqualTo( 1 );
+
+					Parent parent = children.get( 0 ).getParent();
+					assertThat( parent ).isNotNull();
+
+					assertThat( Hibernate.isInitialized( parent ) ).isTrue();
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 2 );
+
+					assertThat( parent.getSomeField() ).isEqualTo( FIELD_VALUE );
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 2 );
+				}
+		);
+	}
+
+	@Test
+	public void testGetResultStreamCollect(SessionFactoryScope scope) {
+		final SQLStatementInspector sqlStatementInterceptor = (SQLStatementInspector) scope.getStatementInspector();
+		sqlStatementInterceptor.clear();
+		scope.inTransaction(
+				session -> {
+					QueryImplementor<Child> query = session
+							.createQuery( "select c from Child as c ", Child.class );
+					Stream<Child> resultStream = query.getResultStream();
+
+					List<Child> children = resultStream.collect( Collectors.toList() );
+					// with Stream the association is not batch loaded
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 3 );
+
+					assertThat( children.size() ).isEqualTo( 2 );
+
+					Parent parent = children.get( 0 ).getParent();
+					assertThat( parent ).isNotNull();
+					assertThat( Hibernate.isInitialized( parent ) ).isTrue();
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 3 );
+
+					assertThat( parent.getSomeField() ).isEqualTo( FIELD_VALUE );
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 3 );
+
+					Parent parent1 = children.get( 1 ).getParent();
+					assertThat( parent1 ).isNotNull();
+					assertThat( Hibernate.isInitialized( parent1 ) ).isTrue();
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 3 );
+
+					assertThat( parent1.getSomeField() ).isEqualTo( FIELD_VALUE_2 );
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 3 );
+				}
+		);
+	}
+
+	@Test
+	public void testGetResultStreamForEach(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					QueryImplementor<Child> query = session
+							.createQuery( "select c from Child as c", Child.class );
+
+					query.getResultStream().forEach(
+							child -> assertThat( child.getParent() ).isNotNull()
+					);
+				}
+		);
+	}
+
+	@Test
+	public void testGetResultStreamFindFirst(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					QueryImplementor<Child> query = session
+							.createQuery( "select c from Child as c where c.parent.someField=:someField", Child.class )
+							.setParameter( "someField", FIELD_VALUE );
+					Stream<Child> resultStream = query.getResultStream();
+					Optional<Child> child = resultStream.findFirst();
+					assertThat( child.isEmpty() ).isFalse();
+					assertThat( child.get().getParent() ).isNotNull();
+				}
+		);
+	}
+
+	@Entity(name = "Child")
+	@Table(name = "CHILD_TABLE")
+	public static class Child {
+
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		@ManyToOne
+		@JoinColumn(name = "parent_id", nullable = false, updatable = false)
+		private Parent parent;
+
+		public Child() {
+		}
+
+		public Child(Parent parent) {
+			this.parent = parent;
+		}
+
+		public Parent getParent() {
+			return parent;
+		}
+
+		public Long getId() {
+			return id;
+		}
+	}
+
+	@Entity(name = "Parent")
+	@Table(name = "PARENT_TABLE")
+	public static class Parent {
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		private String someField;
+
+		public Parent() {
+		}
+
+		public Parent(String someField) {
+			this.someField = someField;
+		}
+
+		public String getSomeField() {
+			return someField;
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+	}
+
+
+}

hibernate-core/src/test/java/org/hibernate/orm/test/batchfetch/EagerManyToOneTest.java

@@ -0,0 +1,157 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.orm.test.batchfetch;
+
+import java.util.List;
+
+import org.hibernate.Hibernate;
+import org.hibernate.cfg.AvailableSettings;
+import org.hibernate.query.Query;
+
+import org.hibernate.testing.jdbc.SQLStatementInspector;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.hibernate.testing.orm.junit.ServiceRegistry;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.hibernate.testing.orm.junit.Setting;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+@DomainModel(
+		annotatedClasses = { EagerManyToOneTest.Child.class, EagerManyToOneTest.Parent.class }
+)
+@SessionFactory(statementInspectorClass = SQLStatementInspector.class)
+@ServiceRegistry(settings = @Setting(name = AvailableSettings.DEFAULT_BATCH_FETCH_SIZE, value = "2"))
+@JiraKey("HHH-15449")
+public class EagerManyToOneTest {
+
+	public static final String FIELD_VALUE = "a field";
+	public static final String FIELD_VALUE_2 = "a second field";
+
+	@BeforeEach
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Parent parent = new Parent( FIELD_VALUE );
+					session.persist( parent );
+					session.persist( new Child( parent ) );
+					Parent parent2 = new Parent( FIELD_VALUE_2 );
+					session.persist( parent2 );
+					session.persist( new Child( parent2 ) );
+				}
+		);
+	}
+
+	@AfterEach
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					session.createMutationQuery( "delete from Child" ).executeUpdate();
+					session.createMutationQuery( "delete from Parent" ).executeUpdate();
+				}
+		);
+	}
+
+	@Test
+	public void testGetResultList(SessionFactoryScope scope) {
+		final SQLStatementInspector sqlStatementInterceptor = (SQLStatementInspector) scope.getStatementInspector();
+		sqlStatementInterceptor.clear();
+		scope.inTransaction(
+				session -> {
+					Query<Child> query = session
+							.createQuery( "select c from Child as c ", Child.class );
+					List<Child> resultList = query.getResultList();
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 2 );
+
+
+					Parent parent = resultList.get( 0 ).getParent();
+					assertThat( parent ).isNotNull();
+					Parent parent1 = resultList.get( 1 ).getParent();
+					assertThat( parent1 ).isNotNull();
+
+					assertThat( Hibernate.isInitialized( parent ) ).isTrue();
+					assertThat( Hibernate.isInitialized( parent1 ) ).isTrue();
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 2 );
+
+
+					assertThat( parent.getSomeField() ).isEqualTo( FIELD_VALUE );
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 2 );
+
+					assertThat( parent1.getSomeField() ).isEqualTo( FIELD_VALUE_2 );
+					// parent2 has been batch loaded
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 2 );
+				}
+		);
+	}
+
+	@Entity(name = "Child")
+	@Table(name = "CHILD_TABLE")
+	public static class Child {
+
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		@ManyToOne
+		@JoinColumn(name = "parent_id", nullable = false, updatable = false)
+		private Parent parent;
+
+		public Child() {
+		}
+
+		public Child(Parent parent) {
+			this.parent = parent;
+		}
+
+		public Parent getParent() {
+			return parent;
+		}
+
+		public Long getId() {
+			return id;
+		}
+	}
+
+	@Entity(name = "Parent")
+	@Table(name = "PARENT_TABLE")
+	public static class Parent {
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		private String someField;
+
+		public Parent() {
+		}
+
+		public Parent(String someField) {
+			this.someField = someField;
+		}
+
+		public String getSomeField() {
+			return someField;
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+	}
+
+
+}

hibernate-core/src/test/java/org/hibernate/orm/test/batchfetch/LazyManyToOneStreamTest.java

@@ -0,0 +1,211 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.orm.test.batchfetch;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import org.hibernate.Hibernate;
+import org.hibernate.cfg.AvailableSettings;
+import org.hibernate.query.spi.QueryImplementor;
+
+import org.hibernate.testing.jdbc.SQLStatementInspector;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.hibernate.testing.orm.junit.ServiceRegistry;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.hibernate.testing.orm.junit.Setting;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+@DomainModel(
+		annotatedClasses = { LazyManyToOneStreamTest.Child.class, LazyManyToOneStreamTest.Parent.class }
+)
+@SessionFactory( statementInspectorClass = SQLStatementInspector.class)
+@ServiceRegistry(settings = @Setting(name = AvailableSettings.DEFAULT_BATCH_FETCH_SIZE, value = "2"))
+@JiraKey("HHH-15449")
+public class LazyManyToOneStreamTest {
+
+	public static final String FIELD_VALUE = "a field";
+	public static final String FIELD_VALUE_2 = "a second field";
+
+	@BeforeEach
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Parent parent = new Parent( FIELD_VALUE );
+					session.persist( parent );
+					session.persist( new Child( parent ) );
+					Parent parent2 = new Parent( FIELD_VALUE_2 );
+					session.persist( parent2 );
+					session.persist( new Child( parent2 ) );
+				}
+		);
+	}
+
+	@AfterEach
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					session.createMutationQuery( "delete from Child" ).executeUpdate();
+					session.createMutationQuery( "delete from Parent" ).executeUpdate();
+				}
+		);
+	}
+
+	@Test
+	public void testGetResultStreamCollectSingleResult(SessionFactoryScope scope) {
+		final SQLStatementInspector sqlStatementInterceptor = (SQLStatementInspector) scope.getStatementInspector();
+		sqlStatementInterceptor.clear();
+		scope.inTransaction(
+				session -> {
+					QueryImplementor<Child> query = session
+							.createQuery( "select c from Child as c where c.parent.someField=:someField", Child.class )
+							.setParameter( "someField", FIELD_VALUE );
+					Stream<Child> resultStream = query.getResultStream();
+
+					List<Child> children = resultStream.collect( Collectors.toList() );
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 1 );
+					assertThat( children.size() ).isEqualTo( 1 );
+
+					Parent parent = children.get( 0 ).getParent();
+					assertThat( parent ).isNotNull();
+
+					assertThat( Hibernate.isInitialized( parent ) ).isFalse();
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 1 );
+
+					assertThat( parent.getSomeField() ).isEqualTo( FIELD_VALUE );
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 2 );
+				}
+		);
+	}
+
+	@Test
+	public void testGetResultStreamCollect(SessionFactoryScope scope) {
+		final SQLStatementInspector sqlStatementInterceptor = (SQLStatementInspector) scope.getStatementInspector();
+		sqlStatementInterceptor.clear();
+		scope.inTransaction(
+				session -> {
+					QueryImplementor<Child> query = session
+							.createQuery( "select c from Child as c order by id", Child.class );
+					Stream<Child> resultStream = query.getResultStream();
+
+					List<Child> children = resultStream.collect( Collectors.toList() );
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 1 );
+
+					assertThat( children.size() ).isEqualTo( 2 );
+
+					Parent parent = children.get( 0 ).getParent();
+					assertThat( parent ).isNotNull();
+					assertThat( Hibernate.isInitialized( parent ) ).isFalse();
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 1 );
+
+					assertThat( parent.getSomeField() ).isEqualTo( FIELD_VALUE );
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 2 );
+
+					Parent parent1 = children.get( 1 ).getParent();
+					assertThat( parent1 ).isNotNull();
+					// parent2 has been batch loaded
+					assertThat( Hibernate.isInitialized( parent1 ) ).isTrue();
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 2 );
+
+					assertThat( parent1.getSomeField() ).isEqualTo( FIELD_VALUE_2 );
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 2 );
+				}
+		);
+	}
+
+	@Test
+	public void testGetResultStreamFindFirst(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					QueryImplementor<Child> query = session
+							.createQuery( "select c from Child as c where c.parent.someField=:someField", Child.class )
+							.setParameter( "someField", FIELD_VALUE );
+					Stream<Child> resultStream = query.getResultStream();
+
+					Optional<Child> child = resultStream.findFirst();
+					assertThat( child.isEmpty() ).isFalse();
+
+					Parent parent = child.get().getParent();
+					assertThat( parent ).isNotNull();
+
+					assertThat( Hibernate.isInitialized( parent ) ).isFalse();
+				}
+		);
+	}
+
+	@Entity(name = "Child")
+	@Table(name = "CHILD_TABLE")
+	public static class Child {
+
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		@ManyToOne(fetch = FetchType.LAZY)
+		@JoinColumn(name = "parent_id", nullable = false, updatable = false)
+		private Parent parent;
+
+		public Child() {
+		}
+
+		public Child(Parent parent) {
+			this.parent = parent;
+		}
+
+		public Parent getParent() {
+			return parent;
+		}
+
+		public Long getId() {
+			return id;
+		}
+	}
+
+	@Entity(name = "Parent")
+	@Table(name = "PARENT_TABLE")
+	public static class Parent {
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		private String someField;
+
+		public Parent() {
+		}
+
+		public Parent(String someField) {
+			this.someField = someField;
+		}
+
+		public String getSomeField() {
+			return someField;
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+	}
+
+
+}

hibernate-core/src/test/java/org/hibernate/orm/test/batchfetch/LazyManyToOneTest.java

@@ -0,0 +1,157 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.orm.test.batchfetch;
+
+import java.util.List;
+
+import org.hibernate.Hibernate;
+import org.hibernate.cfg.AvailableSettings;
+import org.hibernate.query.Query;
+
+import org.hibernate.testing.jdbc.SQLStatementInspector;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.hibernate.testing.orm.junit.ServiceRegistry;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.hibernate.testing.orm.junit.Setting;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+@DomainModel(
+		annotatedClasses = { LazyManyToOneTest.Child.class, LazyManyToOneTest.Parent.class }
+)
+@SessionFactory(statementInspectorClass = SQLStatementInspector.class)
+@ServiceRegistry(settings = @Setting(name = AvailableSettings.DEFAULT_BATCH_FETCH_SIZE, value = "2"))
+@JiraKey("HHH-15449")
+public class LazyManyToOneTest {
+
+	public static final String FIELD_VALUE = "a field";
+	public static final String FIELD_VALUE_2 = "a second field";
+
+	@BeforeEach
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Parent parent = new Parent( FIELD_VALUE );
+					session.persist( parent );
+					session.persist( new Child( parent ) );
+					Parent parent2 = new Parent( FIELD_VALUE_2 );
+					session.persist( parent2 );
+					session.persist( new Child( parent2 ) );
+				}
+		);
+	}
+
+	@AfterEach
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					session.createMutationQuery( "delete from Child" ).executeUpdate();
+					session.createMutationQuery( "delete from Parent" ).executeUpdate();
+				}
+		);
+	}
+
+	@Test
+	public void testGetResultList(SessionFactoryScope scope) {
+		final SQLStatementInspector sqlStatementInterceptor = (SQLStatementInspector) scope.getStatementInspector();
+		sqlStatementInterceptor.clear();
+		scope.inTransaction(
+				session -> {
+					Query<Child> query = session
+							.createQuery( "select c from Child as c ", Child.class );
+					List<Child> resultList = query.getResultList();
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 1 );
+
+
+					Parent parent = resultList.get( 0 ).getParent();
+					assertThat( parent ).isNotNull();
+					Parent parent1 = resultList.get( 1 ).getParent();
+					assertThat( parent1 ).isNotNull();
+					assertThat( Hibernate.isInitialized( parent ) ).isFalse();
+					assertThat( Hibernate.isInitialized( parent1 ) ).isFalse();
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 1 );
+
+
+					assertThat( parent.getSomeField() ).isEqualTo( FIELD_VALUE );
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 2 );
+
+					assertThat( parent1.getSomeField() ).isEqualTo( FIELD_VALUE_2 );
+					// parent2 has been batch loaded
+					assertThat( sqlStatementInterceptor.getSqlQueries().size() ).isEqualTo( 2 );
+				}
+		);
+	}
+
+	@Entity(name = "Child")
+	@Table(name = "CHILD_TABLE")
+	public static class Child {
+
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		@ManyToOne(fetch = FetchType.LAZY)
+		@JoinColumn(name = "parent_id", nullable = false, updatable = false)
+		private Parent parent;
+
+		public Child() {
+		}
+
+		public Child(Parent parent) {
+			this.parent = parent;
+		}
+
+		public Parent getParent() {
+			return parent;
+		}
+
+		public Long getId() {
+			return id;
+		}
+	}
+
+	@Entity(name = "Parent")
+	@Table(name = "PARENT_TABLE")
+	public static class Parent {
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		private String someField;
+
+		public Parent() {
+		}
+
+		public Parent(String someField) {
+			this.someField = someField;
+		}
+
+		public String getSomeField() {
+			return someField;
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+	}
+
+
+}