一、安装Oracle及SQLServer
数据库安装步骤忽略，保证网络端口可以正常通信即可。
二、安装Oracle透明网关gateway
1、next
2、输入inventory绝对路径以及用户组
3、输入安装绝对路径
4、选择安装的网关
5、配置目标SQL Server 实例信息，该步骤会自动生成相应文件
6、使用root用户按照顺序执行以下脚本
[root@oracle ~]# /data/oraInventory/orainstRoot.sh
Changing permissions of /data/oraInventory.
Adding read,write permissions for group.
Removing read,write,execute permissions for world.
Changing groupname of /data/oraInventory to dba.
The execution of the script is complete.
[root@oracle ~]# /data/oracle/product/11.2.0/db_1/root.sh
Running Oracle 11g root.sh script...
The following environment variables are set as:
ORACLE_OWNER= oracle
ORACLE_HOME= /data/oracle/product/11.2.0/db_1
Enter the full pathname of the local bin directory: [/usr/local/bin]:
Copying dbhome to /usr/local/bin ...
Copying oraenv to /usr/local/bin ...
Copying coraenv to /usr/local/bin ...
Creating /etc/oratab file...
Entries will be added to the /etc/oratab file as needed by
Database Configuration Assistant when a database is created
Finished running generic part of root.sh script.
Now product-specific root actions will be performed.
Finished product-specific root actions.
7、安装完成
8、installd products查看已安装信息
三、配置透明网关gateway
[oracle@oracle db_1]$ cat $ORACLE_HOME/dg4msql/admin/initdg4msql.ora
# This is a customized agent init file that contains the HS parameters
# that are needed for the Database Gateway for Microsoft SQL Server
#
# HS init parameters
#
##仅需要调整该变量，端口默认1433可忽略，否则在hostname后配置，后面跟SQLServer实例名以及SQLServer库名
HS_FDS_CONNECT_INFO=192.168.1.10/MSSQLSERVER/test
# alternate connect format is hostname/serverinstance/databasename
HS_FDS_TRACE_LEVEL=OFF
HS_FDS_RECOVERY_ACCOUNT=RECOVER
HS_FDS_RECOVERY_PWD=RECOVER
以下配置可以参考$ORACLE_HOME/dg4msql/admin/listener.ora.sample、$ORACLE_HOME/dg4msql/admin/tnsnames.ora.sample
[oracle@oracle db_1]$ cat $ORACLE_HOME/network/admin/listener.ora
# listener.ora Network Configuration File: /data/oracle/product/11.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(ADDRESS_LIST=
(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))
)
SID_LIST_LISTENER=
(SID_LIST=
(SID_DESC=
(SID_NAME=dg4msql)
(ORACLE_HOME=/data/oracle/product/11.2.0/db_1)
(PROGRAM=dg4msql)
)
)
ADR_BASE_LISTENER = /data/oracle
重启监听
[oracle@oracle ~]$ lsnrctl stop
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 30-JUN-2020 08:51:39
Copyright (c) 1991, 2009, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))
The command completed successfully
[oracle@oracle ~]$ lsnrctl start
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 30-JUN-2020 08:51:48
Copyright (c) 1991, 2009, Oracle. All rights reserved.
Starting /data/oracle/product/11.2.0/db_1/bin/tnslsnr: please wait...
TNSLSNR for Linux: Version 11.2.0.1.0 - Production
System parameter file is /data/oracle/product/11.2.0/db_1/network/admin/listener.ora
Log messages written to /data/oracle/diag/tnslsnr/oracle/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oracle)(PORT=1521)))
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date 30-JUN-2020 08:51:48
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /data/oracle/product/11.2.0/db_1/network/admin/listener.ora
Listener Log File /data/oracle/diag/tnslsnr/oracle/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oracle)(PORT=1521)))
Services Summary...
Service "dg4msql" has 1 instance(s).
Instance "dg4msql", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
[oracle@oracle ~]$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 30-JUN-2020 08:53:39
Copyright (c) 1991, 2009, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date 30-JUN-2020 08:51:48
Uptime 0 days 0 hr. 1 min. 50 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /data/oracle/product/11.2.0/db_1/network/admin/listener.ora
Listener Log File /data/oracle/diag/tnslsnr/oracle/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oracle)(PORT=1521)))
Services Summary...
Service "dg4msql" has 1 instance(s).
Instance "dg4msql", status UNKNOWN, has 1 handler(s) for this service...
Service "orcl" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orclXDB" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
The command completed successfully
[oracle@oracle db_1]$ cat $ORACLE_HOME/network/admin/tnsnames.ora
# tnsnames.ora Network Configuration File: /data/oracle/product/11.2.0/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = oracle)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)
dg4msql =
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))
(CONNECT_DATA=(SID=dg4msql))
(HS=OK)
)
测试tns
[oracle@oracle ~]$ tnsping dg4msql
TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 30-JUN-2020 08:50:27
Copyright (c) 1997, 2009, Oracle. All rights reserved.
Used parameter files:
/data/oracle/product/11.2.0/db_1/network/admin/sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION= (ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521)) (CONNECT_DATA=(SID=dg4msql)) (HS=OK))
OK (0 msec)
四、创建dblink
#创建dblink，如果在create之后不加public,则创建的dblink就不是公共的,就只有创建者可以使用了
# 创建dblink的用户有对应的数据库权限，create public database link 或者create database link
sys@orcl(133)> create public database link dg4msql2 connect to sa identified by "970125" using 'dg4msql';
Database link created.
Elapsed: 00:00:00.01
#查看dblink
sys@orcl(133)> select owner,object_name from dba_objects where object_type='DATABASE LINK';
OWNER OBJECT_NAME
------------------------------------------------------------ ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
SYS DG4MSQL
PUBLIC DG4MSQL2
Elapsed: 00:00:00.08
#测试
sys@orcl(133)> select * from t1@dg4msql2;
id name
---------- ----------------------------------------
1
2 zijie
Elapsed: 00:00:00.57
sys@orcl(133)> insert into t1@dg4msql values(3,'hello');
1 row created.
Elapsed: 00:00:00.78
sys@orcl(133)> select * from t1@dg4msql2;
id name
---------- ----------------------------------------
1
2 zijie
3 hello
Elapsed: 00:00:00.01
#删除dblink
sys@orcl(133)> drop public database link dg4msql2;
Database link dropped.
Elapsed: 00:00:00.01
Oracle中查询结果集与SQL Server一致
五、总结
Oracle通过透明网关这样的一个接口操纵其他数据库，实现数据库的异构服务。配置上比较简单，保证配置上准确无误，网络通信正常即可实现。如果需要配置多个透明网关，只需要新增一个initSID.ora文件，监听及TNS对应修改即可。