[原]ORACLE 通过gateway组件建立dblink连接sqlserver数据库的实战详细过程

项目背景： Oracle 数据库 11.2.0.1 版本， linuxcentos 6.5 系统，单实例 Sqlserver 2008 版本， windows2008 系统，单实例 1 、下载地址： （ 1 ） oracle 官网

http://www.oracle.com/technetwork/database/enterprise-edition/downloads/112010-linx8664soft-100572.html 里面有下载 gateway 的

（ 2 ）云盘

链接: http://pan.baidu.com/s/1nv8Qnpv 密码: 3u3g

2 、安装

在 Oracle 服务器上安装 gateway （ 11gR2 gateway 是单独的安装包： 11.2.0.4.0x64 是第五个安装包）， 下载下来是linux.x64_11gR2_gateways.zip这样一个压缩包，安装的时候和安装oracle软件一样，通过vnc viewer远程连接进去，解压缩，然后点击./runInstaller进行安装，主要步骤如下所示：

unzip linux.x64_11gR2_gateways.zip

cd gateways

export DISPLAY=192.168.121.90:1

xhost +

（如果报 xhost: unable to open display “192.168.121.90” 的提示，则换成如下命令

export DISPLAY= localhost:1

xhost +

）

su oracle

cd/oracle/gateways/gateways/

./runInstaller

（接下来就是图形化桌面安装窗口演示部分E:\u\oracle\install\pic\*.png）：

3 、配置

安装后在会 ORACLE_HOME 下生成 dg4msql 目录 ，

（ 1 ）修改 initdg4msql.ora

（2）修改$ORACLE_HOME/network/admin下的tnsnames.ora和listener.ora，添加sqlserver实例信息

[oracle@hch_test_121_90 admin]$ vim listener.ora

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME = dg4msql) # 此处为配置文件 SID ，要与 init dg4msql .ora 中的名字对应

(ORACLE_HOME = /home/oracle /app/oracle/product/11.2.0/dbhome_1)

(PROGRAM = dg4msql) # 此处为配置文件目录名称， $ORACLE_HOME/ dg4msql /admin/initdg4msql.ora

)

(SID_DESC =

(SID_NAME = powerdes)

(ORACLE_HOME = /home/oracle/app/oracle/product/11.2.0/dbhome_1)

)

)

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.90)(PORT = 1521))

(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))

)

)

ADR_BASE_LISTENER = /home/oracle/app/oracle

当然如果想让网关监听信息不用 1521 端口也可以如下实验 1522 端口

LISTENER_getways =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.90)(PORT = 1522))

)

)

SID_LIST_LISTENER_getways =

(SID_LIST =

(SID_DESC=

(SID_NAME = dg4msql)

(ORACLE_HOME =/home/oracle /app/oracle/product/11.2.0/dbhome_1)

(PROGRAM = dg4msql)

)

)

[oracle@hch_test_121_90 admin]$ vim tnsnames.ora

(SERVER = DEDICATED)

(SERVICE_NAME = powerdes)

)

)

dg4msql =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.90)(PORT = 1521))

)

(CONNECT_DATA =

(SERVICE_NAME = dg4msql)

)

(HS = OK) # 此处表示连接的非 oracle 数据库

)

PD12190 =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.90)(PORT = 1521))

)

(CONNECT_DATA =

(SERVICE_NAME = powerdes)

)

)

LISTENER_POWERDES =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.90)(PORT = 1521))

测试一下：

[oracle@hch_test_121_90 admin]$ tnsping dg4msql

TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 26-SEP-2016 21:10:26

Copyright (c) 1997, 2009, Oracle. All rights reserved.

Used parameter files:

/home/oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/sqlnet.ora

Used TNSNAMES adapter to resolve the alias

Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.90)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = dg4msql)) (HS = OK))

OK (20 msec)

[oracle@hch_test_121_90 admin]$ 4 、在 oracle 服务器上创建 dblink

PS ：事先需要保证远程的 sqlserver 数据库是正常运行的。

先建立连接sqlserver的dblink：

# 先分配用户创建 db link 的权限

SQL> grant create database link to dw;

Grant succeeded.

SQL>

# 然后使用 dw 用户登录创建 db link ：

createdatabaselink tg4msql connecttosaidentifiedby “ ipva@07 ”

using'(DESCRIPTION=

(ADDRESS_LIST=

(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.121.90)(PORT=1521))

)

(CONNECT_DATA=

(SID=dg4msql)

)

(HS=OK)

)';

然后用 dw 帐号连接 oracle 数据库，在 oracle 中通过 dblink 执行查询功能，证明从 oracle 建立到 sqlserver 的 dblink 成功了：

SQL> select * from Dict_City@tg4msql2 where rownum < 5;

city_id province_id CityResCode

---------- ----------- ----------------------------------------

CityNote Status CreateTime ModifyTime

---------------------------------------- ---------- ------------ ------------

DeleteTime WeatherDate

------------ ------------

2 1 1_Beijing

SP2-0784: Invalid or incomplete character beginning 0xAC returned

242 2 2_Chang Le NP 1 05-FEB-12 05-FEB-12

159 2 2_Fu An

SP2-0784: Invalid or incomplete character beginning 0x89 returned

158 2 2_Fu Ding

city_id province_id CityResCo