Oracle DB Connection with Sybase

Oracle DB Connect to Sybase database steps:

1. Install Oracle Gateway software in Oracle database

2. Configure Sybase server details

$ORACLE_HOME/dg4sybs/admin/initdg4sybs.ora

# This is a customized agent init file that contains the HS parameters
# that are needed for the Database Gateway for Sybase
#
# HS init parameters
#

HS_FDS_CONNECT_INFO=<sybase_server_host_name>:<port>/<schema>
HS_FDS_TRACE_LEVEL=OFF
HS_FDS_RECOVERY_ACCOUNT=RECOVER
HS_FDS_RECOVERY_PWD=RECOVER
HS_KEEP_REMOTE_COLUMN_SIZE = ALL
HS_NLS_LENGTH_SEMANTICS = CHAR
HS_LANGUAGE=AMERICAN_AMERICA.WE8ISO8859P15


3. add below entry into your listener file (if rac then grid home).

(SID_DESC =
        (SID_NAME = dg4sybs)
        (ORACLE_HOME = /u02/app/oracle/product/12.2.0/dbhome_2)
        (PROGRAM = dg4sybs)
)
 )

4. create tnsentry into ORACLE_HOME Which will connect to database

ORACLE_TO_SYBASE=
   (DESCRIPTION=
      (ADDRESS=
         (PROTOCOL=TCP)
         (HOST=<oracle db host name>)
         (PORT=1522)
      )
      (CONNECT_DATA=
         (SID=dg4sybs))
      (HS=OK))


5. create database link into oracle database

CREATE PUBLIC DATABASE LINK SYBASE_TO_ORACLE CONNECT TO "sybase_db_username" IDENTIFIED BY "sybase_db_password" USING 'ORACLE_TO_SYBASE';     

6. Test database connection

select * from dual@SYBASE_TO_ORACLE;