HHH-13746: Implement Load by Multiple Ids using SQL AST

composite id testing

hibernate-core/src/test/java/org/hibernate/orm/test/loading/multiLoad/MultiIdEntityLoadTests.java

@@ -11,6 +11,7 @@ import java.util.List;
 
 import org.hibernate.testing.orm.domain.StandardDomainModel;
 import org.hibernate.testing.orm.domain.gambit.BasicEntity;
+import org.hibernate.testing.orm.domain.gambit.EntityWithAggregateId;
 import org.hibernate.testing.orm.junit.DomainModel;
 import org.hibernate.testing.orm.junit.SessionFactory;
 import org.hibernate.testing.orm.junit.SessionFactoryFunctionalTesting;
@@ -153,6 +154,20 @@ public class MultiIdEntityLoadTests {
 		);
 	}
 
+	@Test
+	public void testMultiLoadingCompositeId(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					final List<EntityWithAggregateId> entities = session.byMultipleIds( EntityWithAggregateId.class ).multiLoad(
+							new EntityWithAggregateId.Key( "abc", "def" ),
+							new EntityWithAggregateId.Key( "123", "456" )
+					);
+
+					assertThat( entities.size(), is( 2 ) );
+				}
+		);
+	}
+
 	@BeforeEach
 	public void prepareTestData(SessionFactoryScope scope) {
 		scope.inTransaction(
@@ -163,6 +178,20 @@ public class MultiIdEntityLoadTests {
 					session.save( first );
 					session.save( second );
 					session.save( third );
+
+					session.save(
+							new EntityWithAggregateId(
+									new EntityWithAggregateId.Key( "abc", "def"),
+									"ghi"
+							)
+					);
+
+					session.save(
+							new EntityWithAggregateId(
+									new EntityWithAggregateId.Key( "123", "456"),
+									"789"
+							)
+					);
 				}
 		);
 	}
@@ -170,7 +199,10 @@ public class MultiIdEntityLoadTests {
 	@AfterEach
 	public void dropTestData(SessionFactoryScope scope) {
 		scope.inTransaction(
-				session -> session.createQuery( "delete BasicEntity" ).executeUpdate()
+				session -> {
+					session.createQuery( "delete BasicEntity" ).executeUpdate();
+					session.createQuery( "delete EntityWithAggregateId" ).executeUpdate();
+				}
 		);
 	}
 

hibernate-testing/src/main/java/org/hibernate/testing/orm/domain/gambit/EntityWithAggregateId.java

@@ -0,0 +1,78 @@
+/*
+ * 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.testing.orm.domain.gambit;
+
+import java.io.Serializable;
+import javax.persistence.Embeddable;
+import javax.persistence.EmbeddedId;
+import javax.persistence.Entity;
+
+/**
+ * @author Steve Ebersole
+ */
+@Entity
+public class EntityWithAggregateId {
+	private Key key;
+	private String data;
+
+	public EntityWithAggregateId() {
+	}
+
+	public EntityWithAggregateId(Key key, String data) {
+		this.key = key;
+		this.data = data;
+	}
+
+	@EmbeddedId
+	public Key getKey() {
+		return key;
+	}
+
+	public void setKey(Key key) {
+		this.key = key;
+	}
+
+	public String getData() {
+		return data;
+	}
+
+	public void setData(String data) {
+		this.data = data;
+	}
+
+
+	@Embeddable
+	public static class Key implements Serializable {
+		private String value1;
+		private String value2;
+
+		public Key() {
+		}
+
+		public Key(String value1, String value2) {
+			this.value1 = value1;
+			this.value2 = value2;
+		}
+
+		public String getValue1() {
+			return value1;
+		}
+
+		public void setValue1(String value1) {
+			this.value1 = value1;
+		}
+
+		public String getValue2() {
+			return value2;
+		}
+
+		public void setValue2(String value2) {
+			this.value2 = value2;
+		}
+	}
+
+}

hibernate-testing/src/main/java/org/hibernate/testing/orm/domain/gambit/GambitDomainModel.java

@@ -30,6 +30,7 @@ public class GambitDomainModel extends AbstractDomainModelDescriptor {
 				EntityWithManyToOneJoinTable.class,
 				EntityWithManyToOneSelfReference.class,
 				EntityWithNonIdAttributeNamedId.class,
+				EntityWithAggregateId.class,
 				EntityWithOneToMany.class,
 				EntityWithOneToOne.class,
 				EntityWithOneToOneJoinTable.class,