低版本使用dblink串連11G版本時報錯ora-02063/ora-01017，dblinkora-02063

低版本使用dblink串連11G版本時報錯ora-02063/ora-01017，dblinkora-02063

一回家，某電訊廠商電話至，建立dblink報錯ora-02063/ora-01017 

關於這個BUG，遇到不是一次了，ORACLE對於該BUG 描述如下

Bug 6738104: ORA-01017 ORA-02063 WHILE CONNECTING FROM10G TO 11G VIA PUBLIC DBLINK
 
Cause
The following Bug 6738104 was logged for this issue which was closed as not abug saying the cause being introduction of password case sensitivity feature in11g
When one creates a database link connection, a user name and password for theconnection needs to be defined. When the database link is created, the passwordis case sensitive. Before a user can connect from a pre-release 11g database toa 11g release database and as the password case sensitivity is enabled bydefault, you must re-create the password for this database link using alluppercase letters.
The reason you need to re-create the password using all uppercase letters is sothat it will match how Oracle Database stores database link passwords. OracleDatabase always stores this type of password in uppercase letters, even if thepassword had originally been created using lower or mixed case letters. If casesensitivity is disabled, the user can enter the password using the case thepassword was created in.

當低版本通過dblink串連11G庫時，預設會將密碼改為大寫。

solution就很簡單啦，重新建立dblink,密碼使用雙引號+小寫即可

例：create database link db_test
 2 connect to wxboss
 3 identified by "wxboss"
 4 using '(DESCRIPTION =
 5 (ADDRESS_LIST =
 6 (ADDRESS = (PROTOCOL =TCP)(HOST = 192.168.99.100)(PORT = 1521))
 7 )
 8 (CONNECT_DATA =
 9 (SERVER = DEDICATED)
 10 (SID = wxboss)
 11 )
 12 )';

特此記錄。