Specifies the mapping of the result of a native SQL query or stored procedure.

   Example:

   Query q = em.createNativeQuery(
       "SELECT o.id AS order_id, " +
           "o.quantity AS order_quantity, " +
           "o.item AS order_item, " +
           "i.name AS item_name, " +
       "FROM Order o, Item i " +
       "WHERE (order_quantity > 25) AND (order_item = i.id)",
   "OrderResults");

   @SqlResultSetMapping(name="OrderResults", 
       entities={ 
           @EntityResult(entityClass=com.acme.Order.class, fields={
               @FieldResult(name="id", column="order_id"),
               @FieldResult(name="quantity", column="order_quantity"), 
               @FieldResult(name="item", column="order_item")})},
       columns={
           @ColumnResult(name="item_name")}
   )