DATAJPA-391 - Added test case to show projections for manually defined queries.

src/test/java/org/springframework/data/jpa/repository/UserRepositoryTests.java

@@ -1080,6 +1080,19 @@ public class UserRepositoryTests {
 		assertThat(repository.findAll((Iterable<Integer>) null), is(emptyIterable()));
 	}
 
+	/**
+	 * @see DATAJPA-391
+	 */
+	@Test
+	public void executesManuallyDefinedQueryWithFieldProjection() {
+
+		flushTestUsers();
+		List<String> lastname = repository.findFirstnamesByLastname("Matthews");
+
+		assertThat(lastname, hasSize(1));
+		assertThat(lastname, hasItem("Dave"));
+	}
+
 	private Page<User> executeSpecWithSort(Sort sort) {
 
 		flushTestUsers();

src/test/java/org/springframework/data/jpa/repository/sample/UserRepository.java

@@ -264,4 +264,10 @@ public interface UserRepository extends JpaRepository<User, Integer>, JpaSpecifi
 	 * @see DATAJPA-231
 	 */
 	int countUsersByFirstname(String firstname);
+
+	/**
+	 * @see DATAJPA-391
+	 */
+	@Query("select u.firstname from User u where u.lastname = ?1")
+	List<String> findFirstnamesByLastname(String lastname);
 }