Insert statement for joined subclass presister doesn't type change the id values for subtables

**
 * @Entity
 * @Table (name="Vehicles")
 * @InheritanceType ("JOINED")
 * @DiscriminatorColumn (name="vehicleClass", type="string")
 * @DiscriminatorMap ({"own"="OwnCar", "renta"="RentedCar"})
 */
class Vehicle
{

	/**
	 * @Id
	 * @Column (name="vehicleID", type="integer")
	 */
	protected $vehicleID;

        /**
	 * @Id
         * @Column (name="dateFrom", type="datetime")
         */
	protected $dateFrom;

       .........
}

/**
 * @Table (name="OwnCars")
 * @Entity (repositoryClass="OwnCarRepo")
 */
class OwnCars_Model_Entity_OwnCar extends OwnCars_Model_Entity_Vehicle {

}

foreach ((array) $id as $idVal) {
    $stmt->bindValue($paramIndex++, $idVal);
}

foreach ((array) $id as $columnNameIdentifier => $idVal) {

    /**
     * Fix untyped join inherited table.
     * All identifiers was typed now.
     */
    $type = \PDO::PARAM_STR;
    if (isset($this->_columnTypes[$columnNameIdentifier])) {
        $type = $this->_columnTypes[$columnNameIdentifier];
    }

    $stmt->bindValue($paramIndex++, $idVal, $type);
}