--- /dev/null
+<?php
+
+namespace Doctrine\Tests\ORM\Functional\Ticket;
+
+require_once __DIR__ . '/../../../TestInit.php';
+
+class DDC279Test extends \Doctrine\Tests\OrmFunctionalTestCase
+{
+ protected function setUp()
+ {
+ parent::setUp();
+ $this->_schemaTool->createSchema(array(
+ $this->_em->getClassMetadata(__NAMESPACE__ . '\DDC279EntityXAbstract'),
+ $this->_em->getClassMetadata(__NAMESPACE__ . '\DDC279EntityX'),
+ $this->_em->getClassMetadata(__NAMESPACE__ . '\DDC279EntityY'),
+ $this->_em->getClassMetadata(__NAMESPACE__ . '\DDC279EntityZ'),
+ ));
+ }
+
+ /**
+ * @group DDC-279
+ */
+ public function testDDC279()
+ {
+ $x = new DDC279EntityX();
+ $y = new DDC279EntityY();
+ $z = new DDC279EntityZ();
+
+ $x->data = 'X';
+ $y->data = 'Y';
+ $z->data = 'Z';
+
+ $x->y = $y;
+ $y->z = $z;
+
+ $this->_em->persist($x);
+ $this->_em->persist($y);
+ $this->_em->persist($z);
+
+ $this->_em->flush();
+ $this->_em->clear();
+
+ $query = $this->_em->createQuery(
+ 'SELECT x, y, z FROM Doctrine\Tests\ORM\Functional\Ticket\DDC279EntityX x '.
+ 'INNER JOIN x.y y INNER JOIN y.z z WHERE x.id = ?1'
+ )->setParameter(1, $x->id);
+
+ $result = $query->getResult();
+
+ $expected1 = 'Y';
+ $expected2 = 'Z';
+
+ $this->assertEquals(1, count($result));
+
+ $this->assertEquals($expected1, $result[0]->y->data);
+ $this->assertEquals($expected2, $result[0]->y->z->data);
+ }
+}
+
+
+/**
+ * @Entity
+ * @InheritanceType("JOINED")
+ * @DiscriminatorColumn(name="discr", type="string")
+ * @DiscriminatorMap({"DDC279EntityX" = "DDC279EntityX"})
+ */
+abstract class DDC279EntityXAbstract
+{
+ /**
+ * @Id
+ * @GeneratedValue
+ * @Column(name="id", type="integer")
+ */
+ public $id;
+
+ /**
+ * @column(type="string")
+ */
+ public $data;
+
+}
+
+/**
+ * @Entity
+ */
+class DDC279EntityX extends DDC279EntityXAbstract
+{
+ /**
+ * @OneToOne(targetEntity="DDC279EntityY")
+ * @JoinColumn(name="y_id", referencedColumnName="id")
+ */
+ public $y;
+}
+
+/**
+ * @Entity
+ */
+class DDC279EntityY
+{
+ /**
+ * @Id @GeneratedValue
+ * @Column(name="id", type="integer")
+ */
+ public $id;
+
+ /**
+ * @column(type="string")
+ */
+ public $data;
+
+ /**
+ * @OneToOne(targetEntity="DDC279EntityZ")
+ * @JoinColumn(name="z_id", referencedColumnName="id")
+ */
+ public $z;
+}
+
+/**
+ * @Entity
+ */
+class DDC279EntityZ
+{
+ /**
+ * @Id @GeneratedValue
+ * @Column(name="id", type="integer")
+ */
+ public $id;
+
+ /**
+ * @column(type="string")
+ */
+ public $data;
+}
\ No newline at end of file