oracle 通过透明网关gateway 连接sqlserver

真实配置如下：

1.安装gateway 在一台单独的机器上，ip：172.30.40.29

2.配置listener.ora如下：

路径：  D:product11.2.0 g_1NETWORKADMINlistener.ora

msqlnstanceName为sqlserver 的实例名称

172.30.40.129为安装gateway的地址，这里如果换成127.0.0.1 会造成通过dblink无法连接（报错：ORA-28545 ORA-02063）

内容：

SID_LIST_LISTENER = 
    (SID_LIST = 
         (SID_DESC = 
            (SID_NAME=dg4msql) 
            (ORACLE_HOME=D:product11.2.0	g_1) 
            (PROGRAM=dg4msql) 
          ) 
         (SID_DESC = 
            (SID_NAME=msqlnstanceName) (ORACLE_HOME=D:product11.2.0	g_1) 
            (PROGRAM=dg4msql) ) ) 

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.30.40.129)(PORT = 1522))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1522))
)
)
)

ADR_BASE_LISTENER = D:product11.2.0	g_1

3.配置initdg4msql.ora

路径：D:product11.2.0 g_1dg4msqladmininitdg4msql.ora

IP地址172.30.10.10为sqlserver服务器地址

内容：

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

#
# HS init parameters
#
#HS_FDS_CONNECT_INFO=[172.30.10.10]//msqlnstanceName

HS_FDS_CONNECT_INFO=[172.30.10.10]//msqlnstanceName

HS_FDS_TRACE_LEVEL=OFF
HS_FDS_RECOVERY_ACCOUNT=RECOVER
HS_FDS_RECOVERY_PWD=RECOVER

4. 在oracle端登陆sqlplus 创建dblink

CREATE PUBLIC DATABASE LINK mssqlnk CONNECT TO  "sa" identified by "sqlserverPassword" using 
'(DESCRIPTION= 
        (ADDRESS=(PROTOCOL=tcp)(HOST=172.30.40.129)(PORT=1522)) 
        (CONNECT_DATA=(SID=dg4msql)) 
        (HS=OK) 
     )';

　　

完成以上后就可以在oracle端通过dblink 正常访问sqlserver了。

select * from dual@mssqlnk;