oracle利用透明网关(transparent gateway ) 连接sqlserver 数据库

. 检查oracle 透明网关插件是否已经. 安装后会存在 $ORACLE_HOME\tg4msql 这个文件夹.若没有安装择需要oracle 介质去安装.
  在安装企业版选择自定义时 ,选择transparent gateway  for sqlserver 即可.(默认是没有安装这个组件)
2. 在安装过程中会提示选择 数据库地址,和数据库名称.
3. 安装完成后,就可以配置init文件, 默认会生成inittg4msql.ora文件.
  在目录 $ORACLE_HOME\tg4msql\admin下面 建立文件名 init.ora
    initphone.ora配置内容:
     
    # This is a sample agent init file that contains the HS parameters that are
  # needed for the Transparent Gateway for
  
  #
  # HS init parameters
  #
  HS_FDS_CONNECT_INFO="SERVER=192.168.60.91;DATABASE=phone"
  HS_FDS_TRACE_LEVEL=OFF
  HS_FDS_RECOVERY_ACCOUNT=RECOVER
  HS_FDS_RECOVERY_PWD=RECOVER

4. 配置listener.ora
  在SID_LIST_LISTENER 中添加SID_DESC , 描述sql server db 的信息
   SID_LIST_LISTENER =
    (SID_LIST =
      (SID_DESC =
        (SID_NAME = PLSExtProc)
        (ORACLE_HOME = d:\oracle\ora92)
        (PROGRAM = extproc)
      )
      (SID_DESC =
        (GLOBAL_NAME = PayCent)
        (ORACLE_HOME = d:\oracle\ora92)
        (SID_NAME = oradb)
      )
      (SID_DESC =
        (SID_NAME = phone)
        (ORACLE_HOME = d:\oracle\ora92)
        (PROGRAM = tg4msql)
      )
    )

5. 配置tnsnames.ora

SQLSERVER =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.60.91)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SID = phone)
    )
    (HS=OK)
  )
 
6. 建立dblink
 create database link SQLSERVER
  connect to SA identified by SA
  using 'SQLSERVER';

7. .
 select * from;