HHH-11437 - Test for issue

hibernate-core/src/test/java/org/hibernate/test/hql/JoinOnClauseTest.java

@@ -0,0 +1,178 @@
+/*
+ * 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.test.hql;
+
+import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
+import org.hibernate.testing.TestForIssue;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+
+import javax.persistence.CascadeType;
+import javax.persistence.Entity;
+import javax.persistence.FetchType;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.Inheritance;
+import javax.persistence.InheritanceType;
+import javax.persistence.ManyToOne;
+import javax.persistence.OneToMany;
+import javax.persistence.Table;
+import javax.persistence.criteria.CriteriaBuilder;
+import javax.persistence.criteria.CriteriaQuery;
+import javax.persistence.criteria.Join;
+import javax.persistence.criteria.Root;
+import java.util.List;
+
+import static org.hamcrest.core.Is.is;
+import static org.hibernate.testing.transaction.TransactionUtil.doInJPA;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.fail;
+
+/**
+ * @author Christian Beikov
+ */
+public class JoinOnClauseTest extends BaseEntityManagerFunctionalTestCase {
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class[] {Item.class, Price.class, Book.class, Bid.class, Author.class, Car.class, Person.class};
+	}
+
+	@Before
+	public void setUp(){
+		doInJPA( this::entityManagerFactory, entityManager -> {
+			Price price = new Price( 10, "EUR" );
+			Author author = new Author( "Author 1" );
+			Book book = new Book( author, "Book 1", price );
+			entityManager.persist( book );
+
+			book = new Book( author, "Book 2", price );
+			entityManager.persist( book );
+		} );
+	}
+
+	@Test
+	@TestForIssue(jiraKey = "HHH-11437")
+	public void testOnClauseUsesNonDrivingTableAlias() {
+		doInJPA( this::entityManagerFactory, entityManager -> {
+			List<Book> result = entityManager.createQuery( "SELECT DISTINCT b1 FROM Book b1 JOIN Book b2 ON b1.price = b2.price", Book.class )
+				.getResultList();
+			assertEquals(2, result.size());
+		} );
+	}
+
+	@Entity(name = "Item")
+	@Inheritance(strategy = InheritanceType.JOINED)
+	public static class Item {
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		@ManyToOne(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
+		private Price price;
+
+		public Item() {
+		}
+
+		public Item(Price price) {
+			this.price = price;
+		}
+	}
+
+	@Entity(name = "Price")
+	public static class Price{
+		@Id
+		long id;
+
+		public Price() {
+		}
+
+		public Price(int amount, String currency) {
+			this.amount = amount;
+			this.currency = currency;
+		}
+
+		int amount;
+
+		String currency;
+	}
+
+	@Entity(name = "Book")
+	@Table(name="BOOK")
+	public static class Book extends Item {
+		private String title;
+
+		@ManyToOne(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
+		private Author author;
+
+		public Book() {
+		}
+
+		public Book(Author author, String title, Price price) {
+			super(price);
+			this.author = author;
+			this.title = title;
+		}
+	}
+
+	@Entity(name = "Car")
+	@Table(name="CAR")
+	public static class Car extends Item {
+		@OneToMany
+		private List<Person> owners;
+
+		String color;
+	}
+
+	@Entity(name = "Bid")
+	@Table(name = "BID")
+	public static class Bid {
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		@ManyToOne(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
+		private Item item;
+
+		public Bid() {
+		}
+
+		public Bid(Item item) {
+			this.item = item;
+		}
+	}
+
+	@Entity(name = "Author")
+	@Table(name = "AUTHOR")
+	public static class Author {
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		private String name;
+
+		public Author() {
+		}
+
+		public Author(String name) {
+			this.name = name;
+		}
+	}
+
+	@Entity(name = "Person")
+	@Table(name = "PERSON")
+	public static class Person {
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		private String name;
+	}
+}