Вы можете использовать БД шлюза версии 11.2 для доступа к старой базе данных 9.2.0.8.Создайте dblink из базы данных шлюза версии 11.2 для старой базы данных 9.2.0.8.
C:\oracle\instantclient_12_2>.\sqlplus.exe scott/tiger@oracle11
SQL*Plus: Release 12.2.0.1.0 Production on Mon Feb 18 07:31:38 2019
Copyright (c) 1982, 2017, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Release 11.2.0.3.0 - 64bit Production
SQL> select * from dept@oracle9;
DEPTNO DNAME LOC
---------- -------------- -------------
12 RESEARCH SARATOGA
10 ACCOUNTING CLEVELAND
11 ART SALEM
13 FINANCE BOSTON
21 SALES PHILA.
22 SALES ROCHESTER
42 INT'L SAN FRAN
7 rows selected.
Клиент Oracle 11.2.0.4 может подключаться к СУБД Oracle 9.2.0.8.
C:\oracle\instantclient_11_2>.\sqlplus.exe scott/tiger@oracle9
SQL*Plus: Release 11.2.0.4.0 Production on Mon Feb 18 07:37:22 2019
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.8.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.8.0 - Production
SQL>
Oracleклиент 12.2.0.1 не может подключиться к СУБД Oracle 9.2.0.8.
C:\oracle\instantclient_12_2>.\sqlplus.exe scott/tiger@oracle9
SQL*Plus: Release 12.2.0.1.0 Production on Mon Feb 18 07:36:45 2019
Copyright (c) 1982, 2017, Oracle. All rights reserved.
ERROR:
ORA-03134: Connections to this server version are no longer supported.