diff --git a/lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php b/lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php
index 59cb38aa3..04ec30aec 100644
--- a/lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php
+++ b/lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php
@@ -341,7 +341,7 @@ class PostgreSqlPlatform extends AbstractPlatform
 
     public function getListTableForeignKeysSql($table, $database = null)
     {
-        return "SELECT r.name, pg_catalog.pg_get_constraintdef(r.oid, true) as condef
+        return "SELECT r.conname, pg_catalog.pg_get_constraintdef(r.oid, true) as condef
                   FROM pg_catalog.pg_constraint r
                   WHERE r.conrelid =
                   (
@@ -568,6 +568,7 @@ class PostgreSqlPlatform extends AbstractPlatform
     {
         return 'CREATE SEQUENCE ' . $sequence->getName() .
                ' INCREMENT BY ' . $sequence->getAllocationSize() .
+               ' MINVALUE ' . $sequence->getInitialValue() .
                ' START ' . $sequence->getInitialValue();
     }
     
diff --git a/lib/Doctrine/DBAL/Schema/PostgreSqlSchemaManager.php b/lib/Doctrine/DBAL/Schema/PostgreSqlSchemaManager.php
index a36f811d5..3c3bbc68d 100644
--- a/lib/Doctrine/DBAL/Schema/PostgreSqlSchemaManager.php
+++ b/lib/Doctrine/DBAL/Schema/PostgreSqlSchemaManager.php
@@ -52,7 +52,7 @@ class PostgreSqlSchemaManager extends AbstractSchemaManager
         }
 
         return new ForeignKeyConstraint(
-            $localColumns, $foreignTable, $foreignColumns, $tableForeignKey['name'],
+            $localColumns, $foreignTable, $foreignColumns, $tableForeignKey['conname'],
             array('onUpdate' => $onUpdate, 'onDelete' => $onDelete)
         );
     }
@@ -87,7 +87,7 @@ class PostgreSqlSchemaManager extends AbstractSchemaManager
       
       $this->_platform = $tmpPlatform;
       $this->_conn = $tmpConn;
-    }    
+    }
     
     protected function _getPortableTriggerDefinition($trigger)
     {
@@ -153,8 +153,8 @@ class PostgreSqlSchemaManager extends AbstractSchemaManager
 
     protected function _getPortableSequenceDefinition($sequence)
     {
-        $data = $this->_conn->fetchAll('SELECT start_value, increment_by FROM '.$sequence['relname']);
-        return new Sequence($sequence['relname'], $data[0]['increment_by'], $data[0]['start_value']);
+        $data = $this->_conn->fetchAll('SELECT min_value, increment_by FROM '.$sequence['relname']);
+        return new Sequence($sequence['relname'], $data[0]['increment_by'], $data[0]['min_value']);
     }
 
     protected function _getPortableTableConstraintDefinition($tableConstraint)
diff --git a/lib/Doctrine/ORM/Internal/Hydration/ObjectHydrator.php b/lib/Doctrine/ORM/Internal/Hydration/ObjectHydrator.php
index 69341385f..d2be5fb1e 100644
--- a/lib/Doctrine/ORM/Internal/Hydration/ObjectHydrator.php
+++ b/lib/Doctrine/ORM/Internal/Hydration/ObjectHydrator.php
@@ -266,7 +266,7 @@ class ObjectHydrator extends AbstractHydrator
                     continue;
                 }
 
-                $parentClass = get_class($parentObject);
+                $parentClass = $this->_rsm->aliasMap[$parentAlias];
                 $oid = spl_object_hash($parentObject);
                 $relationField = $this->_rsm->relationMap[$dqlAlias];
                 $relation = $this->_ce[$parentClass]->associationMappings[$relationField];
diff --git a/tests/Doctrine/Tests/DBAL/Platforms/PostgreSqlPlatformTest.php b/tests/Doctrine/Tests/DBAL/Platforms/PostgreSqlPlatformTest.php
index 048092fff..197a14ac3 100644
--- a/tests/Doctrine/Tests/DBAL/Platforms/PostgreSqlPlatformTest.php
+++ b/tests/Doctrine/Tests/DBAL/Platforms/PostgreSqlPlatformTest.php
@@ -145,7 +145,7 @@ class PostgreSqlPlatformTest extends AbstractPlatformTestCase
     {
         $sequence = new \Doctrine\DBAL\Schema\Sequence('myseq', 20, 1);
         $this->assertEquals(
-            'CREATE SEQUENCE myseq INCREMENT BY 20 START 1',
+            'CREATE SEQUENCE myseq INCREMENT BY 20 MINVALUE 1 START 1',
             $this->_platform->getCreateSequenceSql($sequence)
         );
         $this->assertEquals(
diff --git a/tests/Doctrine/Tests/ORM/Functional/SingleTableInheritanceTest.php b/tests/Doctrine/Tests/ORM/Functional/SingleTableInheritanceTest.php
index 92c4c7103..6f7292bb6 100644
--- a/tests/Doctrine/Tests/ORM/Functional/SingleTableInheritanceTest.php
+++ b/tests/Doctrine/Tests/ORM/Functional/SingleTableInheritanceTest.php
@@ -19,7 +19,8 @@ class SingleTableInheritanceTest extends \Doctrine\Tests\OrmFunctionalTestCase
             $this->_schemaTool->createSchema(array(
                 $this->_em->getClassMetadata('Doctrine\Tests\ORM\Functional\ParentEntity'),
                 $this->_em->getClassMetadata('Doctrine\Tests\ORM\Functional\ChildEntity'),
-                $this->_em->getClassMetadata('Doctrine\Tests\ORM\Functional\RelatedEntity')
+                $this->_em->getClassMetadata('Doctrine\Tests\ORM\Functional\RelatedEntity'),
+                $this->_em->getClassMetadata('Doctrine\Tests\ORM\Functional\ParentRelatedEntity')
             ));
         } catch (\Exception $e) {
             // Swallow all exceptions. We do not test the schema tool here.
@@ -56,7 +57,9 @@ class SingleTableInheritanceTest extends \Doctrine\Tests\OrmFunctionalTestCase
         $this->assertTrue(is_numeric($entities[0]->getId()));
         $this->assertTrue(is_numeric($entities[1]->getId()));
         $this->assertTrue($entities[0] instanceof ParentEntity);
-        $this->assertTrue($entities[1] instanceof ChildEntity);  
+        $this->assertTrue($entities[1] instanceof ChildEntity);
+        $this->assertNull($entities[0]->getParentRelated());
+        $this->assertNull($entities[1]->getParentRelated());
         $this->assertEquals('foobar', $entities[0]->getData());
         $this->assertEquals('thedata', $entities[1]->getData());
         $this->assertEquals(1234, $entities[1]->getNumber());
@@ -70,6 +73,7 @@ class SingleTableInheritanceTest extends \Doctrine\Tests\OrmFunctionalTestCase
         $this->assertTrue(is_numeric($entities[0]->getId()));
         $this->assertEquals('thedata', $entities[0]->getData());
         $this->assertEquals(1234, $entities[0]->getNumber());
+        $this->assertNull($entities[0]->getParentRelated());
 
         $this->_em->clear();
 
@@ -83,6 +87,7 @@ class SingleTableInheritanceTest extends \Doctrine\Tests\OrmFunctionalTestCase
         $this->assertTrue($entities[0]->getOwner() instanceof ChildEntity);
         $this->assertEquals('thedata', $entities[0]->getOwner()->getData());
         $this->assertSame($entities[0], $entities[0]->getOwner()->getRelatedEntity());
+        $this->assertNull($entities[0]->getOwner()->getParentRelated());
 
         $query = $this->_em->createQuery("update Doctrine\Tests\ORM\Functional\ChildEntity e set e.data = 'newdata'");
 
@@ -114,6 +119,7 @@ class SingleTableInheritanceTest extends \Doctrine\Tests\OrmFunctionalTestCase
         $this->assertEquals(1234, $child2->getNumber());
         $this->assertEquals($child->getId(), $child2->getId());
         $this->assertFalse($child === $child2);
+        $this->assertNull($child2->getParentRelated());
     }
     
     public function testGetScalarResult()
@@ -138,7 +144,7 @@ class SingleTableInheritanceTest extends \Doctrine\Tests\OrmFunctionalTestCase
         $this->assertEquals('child', $result[0]['e_discr']);
     }
     
-    public function testPolymorphicFind()
+    public function testPolymorphicFindAndQuery()
     {
         $child = new ChildEntity;
         $child->setData('thedata');
@@ -154,7 +160,33 @@ class SingleTableInheritanceTest extends \Doctrine\Tests\OrmFunctionalTestCase
         $this->assertTrue($child2 instanceof ChildEntity);
         $this->assertEquals('thedata', $child2->getData());
         $this->assertSame(1234, $child2->getNumber());
+        
+        $parentRelated = new ParentRelatedEntity;
+        $parentRelated->setData('related to parent!');
+        $child2->setParentRelated($parentRelated);
+        $parentRelated->setParent($child2);
+        $this->_em->persist($parentRelated);
+        
+        //$this->_em->getConnection()->getConfiguration()->setSqlLogger(new \Doctrine\DBAL\Logging\EchoSqlLogger);
+        
+        $this->_em->flush();
+        $this->_em->clear();
+        
+        $query = $this->_em->createQuery("select p, r from Doctrine\Tests\ORM\Functional\ParentEntity p join p.parentRelated r");
+        $result = $query->getResult();
+        
+        $this->assertEquals(1, count($result));
+        $this->assertTrue($result[0] instanceof ChildEntity);
+        $related = $result[0]->getParentRelated();
+        $this->assertFalse($related instanceof \Doctrine\ORM\Proxy\Proxy);
+        $this->assertTrue($related instanceof ParentRelatedEntity);
+        $this->assertEquals('related to parent!', $related->getData());
     }
+    
+    /*public function testPolymorphicQueryWithJoin()
+    {
+        
+    }*/
 }
 
 /**
@@ -175,6 +207,9 @@ class ParentEntity {
      * @Column(name="DATA", type="string")
      */
     private $data;
+    
+    /** @OneToOne(targetEntity="ParentRelatedEntity", mappedBy="parent") */
+    private $parentRelated;
 
     public function getId() {
         return $this->id;
@@ -187,6 +222,14 @@ class ParentEntity {
     public function setData($data) {
         $this->data = $data;
     }
+    
+    public function getParentRelated() {
+        return $this->parentRelated;
+    }
+    
+    public function setParentRelated($parentRelated) {
+        $this->parentRelated = $parentRelated;
+    }
 }
 
 /**
@@ -263,3 +306,24 @@ class RelatedEntity {
         }
     }
 }
+
+/** @Entity */
+class ParentRelatedEntity {
+    /**
+     * @Id @Column(type="integer")
+     * @GeneratedValue(strategy="AUTO")
+     */
+    private $id;
+    public function getId() {return $this->id;}
+    /** @Column(type="string") */
+    private $data;
+    public function getData() {return $this->data;}
+    public function setData($data) {$this->data = $data;}
+    /**
+     * @OneToOne(targetEntity="ParentEntity")
+     * @JoinColumn(name="parent_id", referencedColumnName="id")
+     */
+    private $parent;
+    public function getParent() {return $this->parent;}
+    public function setParent($parent) {$this->parent = $parent;}
+}