这篇文章主要介绍“怎么解决oracle 19c sec_case_sensitive_logon参数问题”，在日常操作中，相信很多人在怎么解决oracle 19c sec_case_sensitive_logon参数问题问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”怎么解决oracle 19c sec_case_sensitive_logon参数问题”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
11g前，密码不区分大小写，11g开始引入了sec_case_sensitive_logon参数控制密码敏感，默认true，大小写敏感。
安装完19C后，将sec_case_sensitive_logon调成false，设置密码大小写不敏感后，发现即使使用正确的密码也无法登录了。
原来19C中早已废弃了sec_case_sensitive_logon参数，重启数据库也可以看到提示：
MOS上相关的文章有很多，例如：
DBUA Removes SEC_CASE_SENSITIVE_LOGON Init Parameter After Upgrading to 12c (Doc ID 2107717.1)
SEC_CASE_SENSITIVE_LOGON init parameter has been deprecated in 12c, hence ideally you should comment out this parameter before upgrade to 12c. But if you still set SEC_CASE_SENSITIVE_LOGON system parameter, the Database Upgrade Assistant (DBUA) removes the SEC_CASE_SENSITIVE_LOGON system parameter during the upgrade process if it exists in the parameter file (reference Bug 16238456 ).
18c: All user connections fail with ORA-01017 except SYS when SEC_CASE_SENSITIVE_LOGON=FALSE (Doc ID 2502204.1)
What Is the SEC_CASE_SENSITIVE_LOGON Parameter and How Is It Used? (Doc ID 2378179.1)
The SEC_CASE_SENSITIVE_LOGON parameter enables or disables password case sensitivity in the database. It is defaulted to a TRUE value.
True - Database logon passwords are case sensitive
False - Database logon passwords are not case sensitive
For additional information please refer to the following Database Security Guide: https://docs.oracle.com/database/121/DBSEG/authentication.htm#DBSEG3225测试过程如下：
查看数据库版本
SQL> select banner from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production启动所有PDB
SQL> alter pluggable database all open;
SQL> show pdbs
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 CJCPDB READ WRITE NO查看当前参数值
SQL> show parameter sec_case_sensitive_logon
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
sec_case_sensitive_logon boolean TRUE创建新用户
SQL> create user c##chen identified by a;
User created.
SQL> grant connect to c##chen;
Grant succeeded.密码区分大小写
SQL> conn c##chen/a
Connected.
SQL> conn c##chen/A
ERROR:
ORA-01017: invalid username/password; logon denied
Warning: You are no longer connected to ORACLE.更改参数
SQL> show parameter sec_case_sensitive_logon
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
sec_case_sensitive_logon boolean TRUESQL> conn / as sysdba
Connected.
SQL> alter system set sec_case_sensitive_logon=false;
System altered.新用户无法登录(即使使用正确的密码)
SQL> conn c##chen/a
ERROR:
ORA-01017: invalid username/password; logon denied
Warning: You are no longer connected to ORACLE.
SQL> conn c##chen/A
ERROR:
ORA-01017: invalid username/password; logon denied改回参数
SQL> conn / as sysdba
Connected.
SQL> alter system set sec_case_sensitive_logon=true;
System altered.
SQL> conn c##chen/A
ERROR:
ORA-01017: invalid username/password; logon denied
Warning: You are no longer connected to ORACLE.可以正常登录
SQL> conn c##chen/a
Connected.
SQL> show user
USER is "C##CHEN"也可以通过设置sqlnet.ora，实现大小写不敏感
该参数用来限制可以连接到数据库服务器上的最小客户端版本，比如设置值为10，即10g，11g等以上客户端版本可以连接到数据库服务器上。
[oracle@cjcos01 admin]$ pwd
/u01/app/oracle/product/19.0.0/dbhome_1/network/admin
[oracle@cjcos01 admin]$ cat sqlnet.ora
SQLNET.ALLOWED_LOGON_VERSION_SERVER=8
SQLNET.ALLOWED_LOGON_VERSION_CLIENT=8修改参数
SQL> alter system set sec_case_sensitive_logon=false;
System altered.创建用户
SQL> create user c##ccc identified by a;
User created.
SQL> grant connect to c##ccc;
Grant succeeded.密码大小写不敏感
SQL> conn c##ccc/a
Connected.
SQL> conn c##ccc/A
Connected.到此，关于“怎么解决oracle 19c sec_case_sensitive_logon参数问题”的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注亿速云网站，小编会继续努力为大家带来更多实用的文章！
