HHH-14475 - select indices from ternary relation is broken since 5.4.13 (at least in mariadb)

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

@@ -0,0 +1,111 @@
+package org.hibernate.test.hql;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.JoinTable;
+import javax.persistence.MapKeyJoinColumn;
+import javax.persistence.OneToMany;
+import javax.persistence.Table;
+import static org.hamcrest.core.Is.is;
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.junit4.BaseNonConfigCoreFunctionalTestCase;
+import static org.hibernate.testing.transaction.TransactionUtil.doInHibernate;
+import org.junit.Before;
+import org.junit.Test;
+import static org.junit.Assert.assertThat;
+
+/**
+ * @author Burkhard Graves
+ */
+@TestForIssue(jiraKey = "HHH-14475")
+public class IndicesTest extends BaseNonConfigCoreFunctionalTestCase {
+    
+    @Override
+    protected Class[] getAnnotatedClasses() {
+        return new Class[] {Project.class, Role.class, Person.class};
+    }
+    
+    @Before
+    public void setUp() {
+        doInHibernate( this::sessionFactory, session -> {
+
+            Project project = new Project(1);
+            Role role = new Role(1);
+            
+            session.save( project );
+            session.save( role );
+
+            Person person = new Person(1, project, role);
+            
+            session.save( person );
+        });
+    }
+    
+    @Test
+    public void testSelectIndices() {
+        doInHibernate( this::sessionFactory, session -> {
+            
+            List<Object> result = session.createQuery(
+                    "select indices(p.roles) from Person p"
+            ).list();
+
+            assertThat( result.size(), is( 1 ) );
+        });
+    }
+
+    @Entity(name = "Person")
+    public static class Person {
+
+        @Id
+        private Integer id;
+
+        @OneToMany
+        @JoinTable(name = "person_to_role",
+                joinColumns = @JoinColumn(name = "person_id"),
+                inverseJoinColumns = @JoinColumn(name = "role_id")
+        )
+        @MapKeyJoinColumn(name = "project_id")
+        private Map<Project, Role> roles;
+
+        public Person() {
+        }
+        
+        public Person(Integer id, Project project, Role role) {
+            this.id = id;
+            roles = new HashMap<>();
+            roles.put(project, role);
+        }
+    }
+
+    @Entity(name = "Project")
+    public static class Project {
+
+        @Id
+        private Integer id;
+
+        public Project() {
+        }
+        
+        public Project(Integer id) {
+            this.id = id;
+        }
+    }
+
+    @Entity(name = "Role")
+    public static class Role {
+
+        @Id
+        private Integer id;
+
+        public Role() {
+        }
+        
+        public Role(Integer id) {
+            this.id = id;
+        }
+    }
+}