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Heterogeneous DB Connection Between Oracle And Postgres Plus

Hi ,

Finally,i have configured the heterogeneous (HS) Database Connectivity between Oracle 11.2 and PPAS 9.1. I believe, the same steps will be suitable for the PostgreSQL as well. Please find the steps one by one .

Step 1:-
We need to Configure the odbcinst.ini file which is having all the Drivers Information.
Description=PostgresPlus Advanced Server ODBC driver

Step 2:-
We need to Configure the odbc.ini file which is having all the DNS entries.

Description=Connection to LDAP/POSTGRESQL
Trace = yes

Step 3:-
Check the DNS Connectivity
[root@CentOS62STM64bit ~]# isql -v edb
| Connected!                            |
|                                       |
| sql-statement                         |
| help [tablename]                      |
| quit                                  |
|                                       |

If you are getting any error like "/opt/PostgresPlus/9.1AS/connectors/odbc/lib/", then do like "ldd *.so" file.
It will show some of the "*.so" files not found. Then fix the issue by downloading those binaries or soft linking the higer version to lower version files.
Step 4:-
Create "initedb.ora" file in $ORACLE_HOME/hs/admin Location with the below contents.

# This is a sample agent init file that contains the HS parameters that are
# needed for an ODBC Agent.
# HS init parameters
# ODBC specific environment variables
set ODBCINI=/etc/odbc.ini
# Environment variables required for the non-Oracle system
#set <envvar>=<value>

Make Sure, your init<sid>.ora file must like init<DNS Name in odbc.ini>.ora. Avoid the Uppercase while giving the DNS names.

Step 5:-
Configure the $ORACLE_HOME/network/admin/listener.ora file with the below contents.

# listener.ora Network Configuration File: /home/oracle/app/oracle/product/11.2.0/dbhome_2/network/admin/listener.ora
# Generated by Oracle configuration tools.

      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))

    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /home/oracle/app/oracle/product/11.2.0/dbhome_2)
      (PROGRAM = extproc)
    (SID_DESC =
      (SID_NAME = edb)
      (ORACLE_HOME = /home/oracle/app/oracle/product/11.2.0/dbhome_2)
      (PROGRAM = dg4odbc)
ADR_BASE_LISTENER = /home/oracle/app/oracle

Step 6:-
Restart the Listener Service.

->lsnrctl stop all
->lsnrctl start
->lsnrctl status

Service "edb" has 1 instance(s).
  Instance "edb", status UNKNOWN, has 1 handler(s) for this service...

Step 7:-
Configure the $ORACLE_HOME/network/admin/tnsnames.ora as below.

# tnsnames.ora Network Configuration File: /home/oracle/app/oracle/product/11.2.0/dbhome_2/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

  (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))

    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
      (SERVICE_NAME = orcl)
edb =
         (ADDRESS = (PROTOCOL = TCP)(HOST = = 1521))
         (CONNECT_DATA =(SID = edb)
Step 8:-
Testing the "tnsping" to given new HS's SID

-> tnsping edb

Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = = 1521)) (CONNECT_DATA =(SID = edb)) (HS=OK))
OK (0 msec)

Step 9:-

Created a dblink as below.
-> create public database link toppas connect to "enterprisedb" identified by "adminedb" using 'edb';

Step 10:-
Tested the HS connectivit as below.
SQL> select * from "pg_database"@topg;
datname                                                              datdba
---------------------------------------------------------------- ----------
  encoding datcollate
---------- ----------------------------------------------------------------
datctype                                                         datis datal
---------------------------------------------------------------- ----- -----
datconnlimit datlastsysoid datfrozenxid dattablespace
------------ ------------- ------------ -------------
template1                                                                10
         6 en_US.UTF-8
en_US.UTF-8                                                      1     1


  1. Excellent detailed info...........
    Good work.

  2. Can you possibly mention what steps are to taken at oracle side and steps at non oracle side. There is no distinction between the two in the document. Where should the driver and manager be downloaded from?


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