diff --git a/tests/Doctrine/Tests/ORM/Hydration/ArrayHydratorTest.php b/tests/Doctrine/Tests/ORM/Hydration/ArrayHydratorTest.php
index d81a02ced..4fb5b92ac 100644
--- a/tests/Doctrine/Tests/ORM/Hydration/ArrayHydratorTest.php
+++ b/tests/Doctrine/Tests/ORM/Hydration/ArrayHydratorTest.php
@@ -736,4 +736,31 @@ class ArrayHydratorTest extends HydrationTestCase
             ++$rowNum;
         }
     }
+
+    /**
+     * @group DDC-644
+     */
+    public function testSkipUnknownColumns()
+    {
+        $rsm = new ResultSetMapping;
+        $rsm->addEntityResult('Doctrine\Tests\Models\CMS\CmsUser', 'u');
+        $rsm->addFieldResult('u', 'u__id', 'id');
+        $rsm->addFieldResult('u', 'u__name', 'name');
+
+        // Faked result set
+        $resultSet = array(
+            array(
+                'u__id' => '1',
+                'u__name' => 'romanb',
+                'foo' => 'bar', // unknown!
+                ),
+        );
+
+        $stmt = new HydratorMockStatement($resultSet);
+        $hydrator = new \Doctrine\ORM\Internal\Hydration\ArrayHydrator($this->_em);
+
+        $result = $hydrator->hydrateAll($stmt, $rsm);
+
+        $this->assertEquals(1, count($result));
+    }
 }
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Hydration/ObjectHydratorTest.php b/tests/Doctrine/Tests/ORM/Hydration/ObjectHydratorTest.php
index 734f1f927..d3bda1e5b 100644
--- a/tests/Doctrine/Tests/ORM/Hydration/ObjectHydratorTest.php
+++ b/tests/Doctrine/Tests/ORM/Hydration/ObjectHydratorTest.php
@@ -51,6 +51,33 @@ class ObjectHydratorTest extends HydrationTestCase
         $this->assertEquals('jwage', $result[1]->name);
     }
 
+    /**
+     * @group DDC-644
+     */
+    public function testSkipUnknownColumns()
+    {
+        $rsm = new ResultSetMapping;
+        $rsm->addEntityResult('Doctrine\Tests\Models\CMS\CmsUser', 'u');
+        $rsm->addFieldResult('u', 'u__id', 'id');
+        $rsm->addFieldResult('u', 'u__name', 'name');
+
+        // Faked result set
+        $resultSet = array(
+            array(
+                'u__id' => '1',
+                'u__name' => 'romanb',
+                'foo' => 'bar', // unknown!
+                ),
+        );
+
+        $stmt = new HydratorMockStatement($resultSet);
+        $hydrator = new \Doctrine\ORM\Internal\Hydration\ObjectHydrator($this->_em);
+
+        $result = $hydrator->hydrateAll($stmt, $rsm, array(Query::HINT_FORCE_PARTIAL_LOAD => true));
+
+        $this->assertEquals(1, count($result));
+    }
+
     /**
      * Select u.id, u.name from \Doctrine\Tests\Models\CMS\CmsUser u
      */
diff --git a/tests/Doctrine/Tests/ORM/Hydration/ScalarHydratorTest.php b/tests/Doctrine/Tests/ORM/Hydration/ScalarHydratorTest.php
index 079778a8c..c8c376f7c 100644
--- a/tests/Doctrine/Tests/ORM/Hydration/ScalarHydratorTest.php
+++ b/tests/Doctrine/Tests/ORM/Hydration/ScalarHydratorTest.php
@@ -68,4 +68,34 @@ class ScalarHydratorTest extends HydrationTestCase
 
         $result = $hydrator->hydrateAll($stmt, $rsm);
     }
+
+    /**
+     * @group DDC-644
+     */
+    public function testSkipUnknownColumns()
+    {
+        $rsm = new ResultSetMapping;
+        $rsm->addEntityResult('Doctrine\Tests\Models\CMS\CmsUser', 'u');
+        $rsm->addFieldResult('u', 'u__id', 'id');
+        $rsm->addFieldResult('u', 'u__name', 'name');
+        $rsm->addScalarResult('foo1', 'foo');
+        $rsm->addScalarResult('bar2', 'bar');
+        $rsm->addScalarResult('baz3', 'baz');
+
+        $resultSet = array(
+            array(
+                'u__id' => '1',
+                'u__name' => 'romanb',
+                'foo1' => 'A',
+                'bar2' => 'B',
+                'baz3' => 'C',
+                'foo' => 'bar', // Unknown!
+            ),
+        );
+
+        $stmt = new HydratorMockStatement($resultSet);
+        $hydrator = new \Doctrine\ORM\Internal\Hydration\ScalarHydrator($this->_em);
+
+        $result = $hydrator->hydrateAll($stmt, $rsm);
+    }
 }
\ No newline at end of file