diff --git a/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php b/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
index c1f25a828..7c5cf8d26 100644
--- a/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
+++ b/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
@@ -1271,7 +1271,8 @@ class ClassMetadataInfo implements ClassMetadata
      */
     public function getTemporaryIdTableName()
     {
-        return $this->table['name'] . '_id_tmp';
+        // replace dots with underscores because PostgreSQL creates temporary tables in a special schema
+        return str_replace('.', '_', $this->table['name'] . '_id_tmp');
     }
 
     /**
diff --git a/tests/Doctrine/Tests/ORM/Mapping/ClassMetadataTest.php b/tests/Doctrine/Tests/ORM/Mapping/ClassMetadataTest.php
index 8f57280df..bcf4df543 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/ClassMetadataTest.php
+++ b/tests/Doctrine/Tests/ORM/Mapping/ClassMetadataTest.php
@@ -236,6 +236,17 @@ class ClassMetadataTest extends \Doctrine\Tests\OrmTestCase
         $this->setExpectedException('Doctrine\ORM\Mapping\MappingException');
         $cm->mapField(array('fieldName' => 'name', 'columnName' => 'name'));
     }
+    
+    /**
+     * @group DDC-1224
+     */
+    public function testGetTemporaryTableNameSchema()
+    {
+        $cm = new ClassMetadata('Doctrine\Tests\Models\CMS\CmsUser');
+        $cm->setTableName('foo.bar');
+        
+        $this->assertEquals('foo_bar_id_tmp', $cm->getTemporaryIdTableName());
+    }
 
     public function testDefaultTableName()
     {