[oracle@db12cr2 bin]$ sqlplus system/aaaaaa sql*Plus: Release 12.2.0.1.0 Production on Wed Mar 15 06:43:38 2017 Copyright (c) 1982,2016,Oracle. All rights reserved. Last Successful login time: Mon Mar 13 2017 18:21:44 +08:00 Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production sql> show parameter case NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ sec_case_sensitive_logon boolean TRUE ------------->>>>>>>>>>>>>默认值 sql> sql> sql> alter system set sec_case_sensitive_logon=false;------------->>>>>>>>>>>>>改为false System altered. sql> show parameter case NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ sec_case_sensitive_logon boolean FALSE sql> exit Disconnected from Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production [oracle@db12cr2 bin]$ sqlplus system/aaaaaa ------------->>>>>>>>>>>>>然后用正确的密码就不能登录了. sql*Plus: Release 12.2.0.1.0 Production on Wed Mar 15 06:44:19 2017 Copyright (c) 1982,Oracle. All rights reserved. ERROR: ORA-01017: invalid username/password; logon denied Enter user-name: ^C [oracle@db12cr2 bin]$ sqlplus / as sysdba sql*Plus: Release 12.2.0.1.0 Production on Wed Mar 15 06:44:43 2017 Copyright (c) 1982,Oracle. All rights reserved. Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production sql> show parameter case NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ sec_case_sensitive_logon boolean FALSE sql> alter system set sec_case_sensitive_logon=true;------------->>>>>>>>>>>>>改为true System altered. sql> exit Disconnected from Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production [oracle@db12cr2 bin]$ sqlplus system/aaaaaa ------------->>>>>>>>>>>>>然后用正确的密码就能登录了!!!! sql*Plus: Release 12.2.0.1.0 Production on Wed Mar 15 06:45:17 2017 Copyright (c) 1982,Oracle. All rights reserved. Last Successful login time: Wed Mar 15 2017 06:43:39 +08:00 Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production sql>
再来测试C##test用户:
sql> alter system set sec_case_sensitive_logon=false; System altered. sql> conn c##test/db12c Connected. sql> show user USER is "C##TEST" sql> exit Disconnected from Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production [oracle@db12cr2 bin]$ sqlplus c##test/db12c------>>>小写的C,能登陆成功. sql*Plus: Release 12.2.0.1.0 Production on Wed Mar 15 06:35:34 2017 Copyright (c) 1982,Oracle. All rights reserved. Last Successful login time: Wed Mar 15 2017 06:35:08 +08:00 Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production sql> exit Disconnected from Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production [oracle@db12cr2 bin]$ sqlplus c##test/db12C------>>>大写的C,能登陆成功,说明密码不再区分大小写. sql*Plus: Release 12.2.0.1.0 Production on Wed Mar 15 06:35:54 2017 Copyright (c) 1982,Oracle. All rights reserved. Last Successful login time: Wed Mar 15 2017 06:35:34 +08:00 Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production sql> show user USER is "C##TEST" sql> ----->>>>>C##test用户能用密码登录成功...
