使Oracle能同时访问多个SQL Server

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整理日期: 2007-04-06
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1、在安装了Oracle9i Standard Edition或者Oracle9i EntERPrise Edition的Windows机器上(IP:192.168.0.2), 产品要选了透明网关(Oracle Transparent Gateway)里访问Microsoft SQL Server数据库。

ORACLE9I_HOME\tg4msql\admin下新写initpubs.ora和initnorthwind.ora配置文件。

initpubs.ora内容如下：

HS_FDS_CONNECT_INFO="SERVER=SQLSERVER_HOSTNMAE;DATABASE=pubs"

HS_DB_NAME=pubsHS_FDS_TRACE_LEVEL=OFF

HS_FDS_RECOVERY_ACCOUNT=RECOVER

HS_FDS_RECOVERY_PWD=RECOVER

initnorthwind.ora内容如下：

HS_FDS_CONNECT_INFO="SERVER=sqlserver_hostname;DATABASE=Northwind"

HS_DB_NAME=Northwind

HS_FDS_TRACE_LEVEL=OFF

HS_FDS_RECOVERY_ACCOUNT=RECOVER

HS_FDS_RECOVERY_PWD=RECOVER

$ORACLE9I_HOME\network\admin 下listener.ora内容如下：

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS_LIST =    (ADDRESS = (PROTOCOL = TCP)(HOST = 
192.168.0.2)(PORT = 1521))

)

)

)

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(GLOBAL_DBNAME = test9)

(ORACLE_HOME = d:\oracle\ora92)

(SID_NAME = test9)

)

(SID_DESC=

(SID_NAME=pubs)

(ORACLE_HOME=d:\Oracle\Ora92)

(PROGRAM=tg4msql)

)

(SID_DESC=

(SID_NAME=northwind)

(ORACLE_HOME=d:\Oracle\Ora92)

(PROGRAM=tg4msql)

)

)

重启动这台做gateway的Windows机器上(IP:192.168.0.2)TNSListener服务(凡是按此步骤新增可访问的SQL Server数据库时，TNSListener服务都要重启动)。

2、Oracle8i，Oracle9i的服务器端配置tnsnames.ora, 添加下面的内容：

pubs =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2)(PORT = 1521))

)

(CONNECT_DATA =

(SID = pubs)

)

(HS = pubs)

)
northwind =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2)(PORT = 1521))

)

(CONNECT_DATA =

(SID = northwind)

)

(HS = northwind)   )

保存tnsnames.ora后,在命令行下：

tnsping pubs

tnsping northwind

出现类似提示，即为成功：

Attempting to contact (DESCRIPTION = (ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2)

(PORT = 1521))) (CONNECT_DATA = (SID = pubs)) (HS = pubs))

OK（20毫秒）

Attempting to contact (DESCRIPTION = (ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2)

(PORT = 1521))) 

(CONNECT_DATA = (SID = northwind)) (HS = northwind))OK（20毫秒）

设置数据库参数global_names=false。

设置global_names=false不要求建立的数据库链接和目的数据库的全局名称一致。global_names=true则要求, 多少有些不方便。

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