웹 검색하다가 찾은 Tip 입니다. ^^;
PPAS 에서  Oracle/PPAS/PostgreSQL로의 DBLink는 해 봤지만,
Oracle에서 PPAS로의 dblink는 다음과 같이하네요 ^^
 
We can create a dblink in oracle to fetch data from
PPAS by using the following procedure, 
Add below lines in /etc/odbc.ini 
1. vi /etc/odbc.ini 
[EnterpriseDB] 
Description = EnterpriseDB 
Driver = EnterpriseDB 8.3 
Trace = yes 
TraceFile = /tmp/odbc.log 
Database = edb 
Servername = <Host IP address> 
UserName = enterprisedb 
Password = edb 
Port = 5444 
2. Add the below parameters in the
odbcinst.ini file: 
Vi /etc/odbcinst.ini 
[EnterpriseDB 8.3] 
Description=EnterpriseDB ODBC driver for Linux
and Windows 
Driver=/opt/PostgresPlus/8.3AS/connectors/odbc/lib/edb-odbc.so 
Debug=0 
CommLog=1 
3. Set the values to the below params in
initSID.ora 
Vi initEnterpriseDB.ora 
HS_FDS_CONNECT_INFO = EnterpriseDB #<odbc
data_source_name> 
HS_FDS_TRACE_LEVEL = off #<trace_level> 
HS_FDS_SHAREABLE_NAME = /usr/lib/libodbc.so #
ODBC specific environment variables 
set ODBCINI= /etc/odbc.ini #<full path name
of the odbc initilization file> 
# 
# Environment variables required for the
non-Oracle system 
# 
#set <envvar>=<value> #<full
path name of odbc driver manager or driver> 
Comment out the “set
<envvar>=<value>” 
4. Edit listener.ora and add 
SID_LIST_LISTENER= 
(SID_LIST= 
(SID_DESC= 
(GLOBAL_DBNAME=EnterpriseDB) 
(ORACLE_HOME=/usr/lib/oracle/xe/app/oracle/product/10.2.0/server) 
(SID_NAME=EnterpriseDB)) 
(SID_DESC= 
(SID_NAME=EnterpriseDB) 
(ORACLE_HOME=/usr/lib/oracle/xe/app/oracle/product/10.2.0/server) 
(PROGRAM=hsodbc))) 
5. At last edit the tnsnames.ora and add as
follows: 
EnterpriseDB = 
(DEscRIPTION = 
(ADDRESS = (PROTOCOL = TCP)(HOST = <IP
address>)(PORT = 1521)) 
(CONNECT_DATA = 
(SID = EnterpriseDB) 
)(HS = OK) 
) 
6. Stop the oracle listener and start again: 
Lisnrctl stop 
Lisnctl start <SID_NAME> 
7. Try to ping the SID with the tnsping by
using the following command: 
-bash-3.1$ tnsping EnterpriseDB 
TNS Ping Utility for Linux: Version 10.2.0.1.0
- Production on 03-JUN-2009 07:16:26 
Copyright (c) 1997, 2005, Oracle. All rights
reserved. 
Used parameter files: 
Used TNSNAMES adapter to resolve the alias 
Attempting to contact (DEscRIPTION = (ADDRESS
= (PROTOCOL = TCP)(HOST = 192.168.23.17)(PORT = 1521)) (CONNECT_DATA = (SID =
EnterpriseDB))(HS = OK)) 
OK (0 msec) 
8. Now connect to Oracle database and create
the dblink by using following syntax: 
SQL> create public database
link <Link name> connect to "<EDB User >" identified by
"<DB name>” using '<Data source Name>'; 
Example: 
SQL> create public database
link edb_link connect to "enterprisedb" identified by "edb"
using 'EnterpriseDB'; 
Now test the dblink: 
SQL> select *from
"temp"@edb_link; 
a 
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