PDOException now wrapped into Doctrine_Exception, transaction rollback...

PDOException now wrapped into Doctrine_Exception, transaction rollback whenever PDOException is thrown

classes/Session.class.php

@@ -472,6 +472,7 @@ abstract class Doctrine_Session extends Doctrine_Configurable implements Countab
             if($this->getAttribute(Doctrine::ATTR_VLD))
                 $this->validator = new Doctrine_Validator();
 
+            try {
                 
                 $this->bulkInsert();
                 $this->bulkUpdate();
@@ -484,6 +485,11 @@ abstract class Doctrine_Session extends Doctrine_Configurable implements Countab
                     }
                 }
 
+            } catch(PDOException $e) {
+                $this->rollback();
+
+                throw new Doctrine_Exception($e->getMessage());
+            }
             $this->dbh->commit();
             $this->getAttribute(Doctrine::ATTR_LISTENER)->onTransactionCommit($this);