Connect to PostgreSQL from Oracle 11gR2

Question

Hi folks!
Trying to connect to PostgreSQL from Oracle 11.2.0.3(RAC). My configuration files are:
initRT.ora:
# HS init parameters
HS_FDS_CONNECT_INFO = RT
HS_FDS_TRACE_LEVEL = ON
HS_FDS_TRACE_FILE_NAME = /tmp/odbc_trace.log
HS_FDS_TRACE_LEVEL = 4
HS_FDS_SHAREABLE_NAME = /usr/lib64/libodbc.so
# ODBC specific environment variables
set ODBCINI=/etc/unixODBC/odbc.inilistener.ora:
LISTENER_SCAN2=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN2))))                # line added by Agent
LISTENER=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER))))            # line added by Agent
LISTENER_SCAN1=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN1))))                # line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN1=ON                # line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER=ON              # line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN2=ON                # line added by Agent
SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME =/u01/app/oracle/product/11.2/db)
      (PROGRAM = extproc)
    (SID_DESC=
      (SID_NAME = RT)
      (ORACLE_HOME = /u01/app/oracle/product/11.2/db)
      (PROGRAM = dg4odbc)
      (ENVS = "LD_LIBRARY_PATH=/usr/lib64:/u01/app/oracle/product/11.2/db/lib:/u01/app/oracle/product/11.2/db/hs/lib")
  )tnsnames.ora:
RT = (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=hostname)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SID=RT))(HS = OK))
isql rt rt3 passw
+---------------------------------------+
| Connected!                            |
|                                       |
| sql-statement                         |
| help [tablename]                      |
| quit                                  |
|                                       |
+---------------------------------------+
SQL> quit
oracle@hostname: psql -h rt rt3 passw
Welcome to psql 8.3.9, the PostgreSQL interactive terminal.
Type:  \copyright for distribution terms
       \h for help with SQL commands
       \? for help with psql commands
       \g or terminate with semicolon to execute query
       \q to quit
rt3=>As you can see, I can connect to PostgreSQL. Then in DB I've created DB link as follows:
CREATE DATABASE LINK "RT"
   CONNECT TO "RT3" IDENTIFIED BY "passw"
   USING 'RT';
oracle@hostname: sqlplus rt3/passw
SQL*Plus: Release 11.2.0.3.0 Production on Tue Nov 15 03:46:12 2011
Copyright (c) 1982, 2011, Oracle.  All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, Oracle Label Security,
Data Mining and Real Application Testing options
rt3@sid1> select * from users@rt;
select * from users@rt
ERROR at line 1:
ORA-28545: error diagnosed by Net8 when connecting to an agent
Unable to retrieve text of NETWORK/NCR message 65535
ORA-02063: preceding 2 lines from RT
Elapsed: 00:00:00.01
rt3@sid1>Don'tunderstand why I can't connect from Oracle? Thanks in advance.
Regards,
Pavel.

Answer 1

Hi, sure:
odbc.ini:
[ODBC Data Sources]
RT=RT Database
[RT]
Description     = RT Database
Driver          = /usr/lib64/psqlodbcw.so
Database        = rt3
TraceFile       = /u01/app/oracle/diag/rdbms/trace/odbc_rt.trc
Trace           = Yes
Servername      = rt.domain.com
Port            = 5432
Protocol        = 6.4
ReadOnly        = Yes
RowVersioning   = No
ShowSystemTables = No
ShowOidColumn   = No
FakeOidIndex    = No
ConnSettings    =
Debug           = 0
CommLog         = 0
oracle@host:> lsnrctl status
LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 15-NOV-2011 04:09:23
Copyright (c) 1991, 2011, Oracle.  All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))
STATUS of the LISTENER
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Start Date                15-NOV-2011 03:30:50
Uptime                    0 days 0 hr. 38 min. 32 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/11.2/grid/network/admin/listener.ora
Listener Log File         /u01/app/grid/diag/tnslsnr/host/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=IP)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=IP)(PORT=1521)))
Services Summary...
Service "+ASM" has 1 instance(s).
  Instance "+ASM1", status READY, has 1 handler(s) for this service...
Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "RT" has 1 instance(s).
  Instance "RT", status UNKNOWN, has 1 handler(s) for this service...
Other servicesListener.log for PROGRAM=dg4odbc is empty. There are a lot of entries for other services.
Regards,
Pavel.
Edited by: Pavel E. on 15.11.2011 13:13