从Oracle 12c到SQLServer 2012的异构数据库链接

Question

My problem: I want to link a Oracle 12c Enterprise with SQLServer 2012. I tried different tutorials but I didn't succeed. On my latest approach with heterogeneous services i got the following error when i try to query something:

select * from conf@PAS;

ORA-28545: Unable to retrieve text of NETWORK/NCR message 65535

conf is a table from the SQL Server and PAS is the name of my database link.

The different guides I followed said that I have to change 3 files to make the connection. I will post them below:

Note: Both of my databases are running on the same machine.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = C:\OracleDB\product\12.1.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:C:\OracleDB\product\12.1.0\dbhome_1\bin\oraclr12.dll")
    )
    (SID_DESC =
        (SID_NAME=PAS) 
        (ORACLE_HOME = C:\OracleDB\product\12.1.0\dbhome_1) 
        (PROGRAM = dg4odbc)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = PASSRV1)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
    )
  )

ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = PASSRV1)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

PAS =
  (DESCRIPTION=
    (ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1433))
      (CONNECT_DATA=(SID=PAS))
      (HS=OK)
    )

HS_FDS_CONNECT_INFO = PAS
HS_FDS_TRACE_LEVEL = OFF

I created the link with this command:

CREATE DATABASE LINK PAS CONNECT TO "user" IDENTIFIED BY "password" USING 'PAS';

The thing is that i don't really know the cause of the error and I don't know how to resolve it. So I hope one of you can help me.

If there is a easier way to create the link I would appreciate it if you tell me. I am open for suggestions.

Thank you!

Answer 1

我通过使用oracle网关并遵循一个简单的教程解决了该问题。

Answer 2

I used to have a similar problem, try first to test tnsping to PAS

cmd> tnsping PAS

after it if you don't have any problem about try to change the port of PAS 1433 is already used by SQL Server in default configuration. Try to start listener without any errors.

Take in account that oracle database gateway for SQL Server has additional cost, if you install cd 5 from oracle installation you could have problems with oracle audit.