oracle中bLink建立错误问题分析及解决

张兴康 · 发表于 2020-4-30 18:29:04

在Oracle10.2.0.4中建立连接到11.2.0.3的DBLINK验证的时候出现如下错误：
ORA-01017: invalid username/password; logon denied
ORA-02063: preceding line from
分析错误：
从错误信息来看，是用户名和密码的错误，但是用户名和密码确定没有问题，能够通过密码进行访问数据库。

详细回顾及出现问题及排错思路如下:

创建dblink使用的用户/密码是正确的。
SQL> conn prudent/woo@woo
Connected to Oracle Database 11g Enterprise Edition Release 11.2.0.3.0
Connected as woo
创建dblink的数据库版本：

SQL> select * from V$VERSION;
BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production

TNS for Linux: Version 10.2.0.4.0 -Production
NLSRTL Version 10.2.0.4.0 - Production

ORACLE 10.2.0.4中创建到 Oracle 11.2.0.3.0 的DBLINK，创建成功

SQL> create database link woo_100
2 connect to prudent
3 identified by woo
4 using '(DESCRIPTION =
5 (ADDRESS_LIST =
6 (ADDRESS = (PROTOCOL =TCP)(HOST = 192.168.0.100)(PORT = 1521))
7 )
8 (CONNECT_DATA =
9 (SERVER = DEDICATED)
10 (SID = woo)
11 )
12 )';

但使用dblink去访问目标数据库时出错
QL> select sysdate from dual@woo;
select sysdate from dual@woo

ORA-01017: invalid username/password; logondenied
ORA-02063: preceding line from woo_100

应该是11g密码区分大小写的缘故，需要在11g中重新设置大写的密码。实际上可以不用通过修改密码的方式来解决，只需要加上“”号即可。
尝试在创建dblink时用“”把密码引起来。

SQL> create database link woo_100
2 connect to prudent
3 identified by "woo"
4 using '(DESCRIPTION =
5 (ADDRESS_LIST =
6 (ADDRESS = (PROTOCOL =TCP)(HOST = 192.168.0.100)(PORT = 1521))
7 )
8 (CONNECT_DATA =
9 (SERVER = DEDICATED)
10 (SID = woo)
11 )
12 )';

Database link created

SQL> alter session setnls_date_format='yyyy-mm-dd hh24:mi:ss';

Session altered

SQL> col sysdate for a20;
SQL> select sysdate from dual@woo_100;