oracle10g的一个bug

Question

SQL> select TABLE_NAME, column_name from user_cons_columns where table_name='ACCOUNTS_USERS';TABLE_NAME                     COLUMN_NAME
------------------------------ --------------------
ACCOUNTS_USERS                 ID
ACCOUNTS_USERS                 PASSWORD
ACCOUNTS_USERS                 NAME
ACCOUNTS_USERS                 ID
SQL> desc ACCOUNTS_USERS;
Name     Type         Nullable Default Comments 
-------- ------------ -------- ------- -------- 
ID       VARCHAR2(20)                           
NAME     VARCHAR2(20)                           
PASSWORD VARCHAR2(32)                           
EMAIL    VARCHAR2(30) Y   有一个可以为空的列名列错了