SEC_CASE_SENSITIVE_LOGON 参数

beginning with Oracle Database 11g Release 1, database passwords are case-sensitive. (You can
disable case sensitivity and return to pre–Release 11 g  behavior by setting the  SEC_CASE_SENSITIVE_LOGON initialization parameter to FALSE.)
从11.1开始，数据库的密码开始区分大小写，但是可以同更改SEC_CASE_SENSITIVE_LOGON initialization=false 回归到以前的状态。
在11.2 默认是true
SQL> select * from v$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0      Production
TNS for Linux: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production

SQL> show parameter SEC_CASE_SENSITIVE_LOGON

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
sec_case_sensitive_logon             boolean     TRUE
SQL>