DATAJPA-148 - Remove qualification of sort reference for functions.

When applying Sort instances we now check for the presence of a ( which indicates a function to be executed.

src/main/java/org/springframework/data/jpa/repository/query/QueryUtils.java

@@ -212,7 +212,7 @@ public abstract class QueryUtils {
 	private static String getOrderClause(Set<String> joinAliases, String alias, Order order) {
 
 		String property = order.getProperty();
-		boolean qualifyReference = true;
+		boolean qualifyReference = !property.contains("("); // ( indicates a function
 
 		for (String joinAlias : joinAliases) {
 			if (property.startsWith(joinAlias)) {

src/test/java/org/springframework/data/jpa/repository/query/QueryUtilsUnitTests.java

@@ -223,6 +223,16 @@ public class QueryUtilsUnitTests {
 				"select count(o) from Foo o where cb.id in (select b from Bar b)");
 	}
 
+	/**
+	 * @see DATAJPA-148
+	 */
+	@Test
+	public void doesNotPrefixSortsIfFunction() {
+
+		Sort sort = new Sort("sum(foo)");
+		assertThat(applySorting("select p from Person p", sort, "p"), endsWith("order by sum(foo) asc"));
+	}
+
 	private void assertCountQuery(String originalQuery, String countQuery) {
 		assertThat(createCountQueryFor(originalQuery), is(countQuery));
 	}