Oracle 11g透明网关连接Sqlserver 2000

一、环境

公司网站系统使用的是IIS + Oracle

但公司某系统使用的是Sqlserver 2000, 但其数据需要做成报表放到网站上，为简化编程，使用Oracle做透明网关，定期从Sqlserver 抓取数据的方式

A: Web Server

• OS: Windows Server 2008
• IP: 10.108.3.10
• 安装软体：IIS, Oracle Client
• 

B: Oralce DB Server

• OS: Windows Server 2008
• IP: 10.108.3.20
• 安装软体： Oracle DB, Oracle Gateway
• 

C: Sqlserver 2000 DB Server

• OS: Windows Server 2003
• IP: 10.108.5.100
• 安装软体: Sqlserver 2000

这里面A和C的安装配置都很简单，主要说下B机器 Oracle透明网关的配置

二、Oracle透明网关配置

1. gateway安装

当然是要先安装好我们的Oracle DB,做好其它业务。然后再来安装Gateway

2. 配置 E:Oracleproduct11.2.0 g_1dg4msqladmininitdg4msql.ora

HS_FDS_CONNECT_INFO=[10.108.5.100].MSSQLSERVER.SQLDB
HS_FDS_TRACE_LEVEL=OFF
HS_FDS_RECOVERY_ACCOUNT=RECOVER
HS_FDS_RECOVERY_PWD=RECOVER

Oracle Gateway在此文件中默认将sqlserver 2000的IP，实例名，数据库名以 / 分隔，这种设置后续会报错，改为以 . 分隔则OK

#HS_FDS_CONNECT_INFO=[10.108.5.100]/MSSQLSERVER/SQLDB

3. 配置E:Oracleproduct11.2.0 g_1NETWORKADMINlistener.ora

SID_LIST_LISTENER =  
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = dg4msql)    #此处为配置文件SID，要与initdg4msql.ora中的名字对应
      (ORACLE_HOME = E:Oracleproduct11.2.0	g_1)
      (PROGRAM = dg4msql)   #此处为配置文件目录名称，Oracle 11g中都为dg4msql，不需变更（注1）
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.108.3.20)(PORT = 1522))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1522))
    )
  )

ADR_BASE_LISTENER = E:Oracleproduct11.2.0	g_1

注1：如果将此处的dg4msql变掉，在最后通过Oracle访问SQL SERVER时会报以下错误

ORA-28545: 连接代理时 Net8 诊断到错误 
Unable to retrieve text of NETWORK/NCR message 65535 
ORA-02063: 紧接着 2 lines

4. 配置E:Oracleproduct11.2.0 g_1NETWORKADMIN nsnames.ora

dg4msql =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.108.3.20)(PORT = 1522))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = dg4msql)
    )
    (HS = OK)
  )

5. 配置E:Oracleproduct11.2.0dbhome_1NETWORKADMINlistener.ora

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = E:Oracleproduct11.2.0dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:E:Oracleproduct11.2.0dbhome_1inoraclr11.dll")
    )
#以下是其它业务的DB
    (SID_DESC =
      (GLOBAL_DBNAME = ORCL)
      (ORACLE_HOME = E:Oracleproduct11.2.0dbhome_1)
      (SID_NAME = ORCL)
    )
#以下是透明网关的设置
    (SID_DESC =
      (SID_NAME = dg4msql)
      (ORACLE_HOME = E:Oracleproduct11.2.0dbhome_1)
      (PROGRAM = dg4msql)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.108.3.20)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

ADR_BASE_LISTENER = E:Oracle

6. 配置E:Oracleproduct11.2.0dbhome_1NETWORKADMIN nsnames.ora

dg4msql =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.108.3.20)(PORT = 1522))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = dg4msql)
    )
    (HS = OK)
  )

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

7. 建立DB link

-- Create database link 
create database link SQLSERVERLINK
  connect to sa identified by password
  using 'dg4msql';