HHH-10125 - Using KEY function in JP-QL SELECT clause selects value columns in rendered SQL

(cherry picked from commit 909c034)

Author: sebersole

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

@@ -0,0 +1,109 @@
+/*
+ * 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 java.util.HashMap;
+import java.util.Map;
+import javax.persistence.Column;
+import javax.persistence.ElementCollection;
+import javax.persistence.Embeddable;
+import javax.persistence.Entity;
+import javax.persistence.EnumType;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.MapKeyColumn;
+import javax.persistence.MapKeyEnumerated;
+import javax.persistence.OneToMany;
+import javax.persistence.Table;
+
+import org.hibernate.Session;
+
+import org.hibernate.testing.junit4.BaseNonConfigCoreFunctionalTestCase;
+import org.junit.Test;
+
+/**
+ * Test originally written to help verify/diagnose HHH-10125
+ *
+ * @author Steve Ebersole
+ */
+public class MapFunctionExpressionsTest extends BaseNonConfigCoreFunctionalTestCase {
+
+	@Test
+	public void testMapKeyExpressionInWhere() {
+		// NOTE : JPA requires that an alias be used in the key() expression.  Hibernate allows
+		//		path or alias.
+
+		Session s = openSession();
+		s.getTransaction().begin();
+		// JPA form
+		s.createQuery( "from Contact c join c.addresses a where key(a) = 'HOME'" ).list();
+		// Hibernate additional form
+		s.createQuery( "from Contact c where key(c.addresses) = 'HOME'" ).list();
+		s.getTransaction().commit();
+		s.close();
+	}
+
+	@Test
+	public void testMapKeyExpressionInSelect() {
+		// NOTE : JPA requires that an alias be used in the key() expression.  Hibernate allows
+		//		path or alias.
+
+		Session s = openSession();
+		s.getTransaction().begin();
+		// JPA form
+		s.createQuery( "select key(a) from Contact c join c.addresses a" ).list();
+		// Hibernate additional form
+		s.createQuery( "select key(c.addresses) from Contact c" ).list();
+		s.getTransaction().commit();
+		s.close();
+	}
+
+	@Test
+	public void testMapValueExpressionInSelect() {
+		Session s = openSession();
+		s.getTransaction().begin();
+		s.createQuery( "select value(a) from Contact c join c.addresses a" ).list();
+		s.createQuery( "select value(c.addresses) from Contact c" ).list();
+		s.getTransaction().commit();
+		s.close();
+	}
+
+	@Override
+	protected Class[] getAnnotatedClasses() {
+		return new Class[] { Address.class, Contact.class };
+	}
+
+	public static enum AddressType {
+		HOME,
+		WORK,
+		BUSINESS
+	}
+
+	@Entity(name = "Address")
+	@Table(name = "address")
+//	@Embeddable
+	public static class Address {
+		@Id
+		public Integer id;
+		String street;
+		String city;
+	}
+
+	@Entity(name = "Contact")
+	@Table(name = "contact")
+	public static class Contact {
+		@Id
+		public Integer id;
+		String name;
+		@OneToMany
+		@JoinColumn
+//		@ElementCollection
+		@MapKeyEnumerated(EnumType.STRING)
+		@MapKeyColumn(name = "addr_type")
+		Map<AddressType, Address> addresses = new HashMap<AddressType, Address>();
+	}
+}