constant record 类型的初始化有关问题

constant record 类型的初始化问题declareTYPEt_testISRECORD(xxNUMBER(10))myconstantt_test:????请问

constant record 类型的初始化问题
declare
TYPE   t_test   IS   RECORD(
    xx   NUMBER(10)
    );
    my   constant   t_test   :=   ????;


请问如何初始化my?

[解决办法]
http://www.oracle-base.com/articles/9i/MutatingTableExceptions.php
[解决办法]
参考:http://www.itpub.net/405702.html