ORACLE9i 的透明网关的配置

Oracle实现异种数据库连接服务的技术叫做透明网关（Transparent Gateway）。目前ORACLE利用透明网关可以实现和SQL SERVER、SYBASE、DB2等多种主流数据库的互联。 笔者由于工作需要，通过oracle访问sybase数据库，把配置oracle9i TRANSPARENT GATEWAY FOR SYBASE的步骤写成文档，供需要的网友参考！配置TRANSPARENT GATEWAY FOR SYBASE步骤1.oracle所在服务器上安装sybase client（或者在同一台server上安装oracle、sybase服务器）确保能够访问sybase数据库2.安装TRANSPARENT GATEWAY FOR SYBASE选件，要用自定义安装。正确选择sybase的安装目录3.选择一个sid字符串预备赋给sybase数据库。如：tg4sybs设置SYBASE的dll路径到环境变量PATH（这一步很重要）4.修改初始化文件，默认的是：ORACLE_HOMEtg4sybsadmininittg4sybs.ora设置参数HS_FDS_CONNECT_INFO格式：HS_FDS_CONNECT_INFO= server_name. database_name[,INTERFACE= interface_file]server_name. database_name是大小写敏感的。INTERFACE可选例子：如下$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$# This is a sample agent init file that contains the HS parameters that are# needed for the Transparent Gateway for Sybase## HS init parameters#HS_FDS_CONNECT_INFO=migration_serv.taxHS_FDS_TRACE_LEVEL=OFFHS_FDS_RECOVERY_ACCOUNT=RECOVERHS_FDS_RECOVERY_PWD=RECOVER## Environment variables required for Sybase#set SYBASE=d: ybase$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$上例中server_name是migration_servdatabase_name是tax5.配置oracle网络服务的listener,配置文件是：listener.ora默认路径：ORACLE_HOMEnetworkadmin加入如下SID_LIST_LISTENER=(SID_LIST=(SID_DESC=(SID_NAME= gateway_sid)(ORACLE_HOME= oracle_home_Directory)(PROGRAM=tg4sybs)))gateway_sid就是3选择的sid字符串oracle_home_directory是ORACLE_HOMEtg4sybs若是SYBASE是特定的。假如是其他数据库，会不同。例子如下：$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ (SID_DESC= (SID_NAME=tg4sybs) (ORACLE_HOME = D:oracleora92) (PROGRAM=tg4sybs) )$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$6.停止监听lsnrctl stop重新启动监听程序lsnrctl start7.配置oracle server的tnsnames.ora使其能够访问sybaseconnect_descriptor=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST= host_name)(PORT= port_number))(CONNECT_DATA=(SID= gateway_sid))(HS=OK))connect_descriptor是连接串，任取，一般为sybshost_name：oracle server的nameport_number：oracle监听端口gateway_sid就是3选择的sid字符串例子如下：$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$sybs= (DESCRIPTION= (ADDRESS_LIST = (ADDRESS=(PROTOCOL=TCP)(HOST= dw-server1)(PORT= 1521)) ) (CONNECT_DATA= (SID= tg4sybs) ) (HS=OK) )$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$8.建立database link如：CREATE; DATABASE LINK sybs; CONNECT TO sa IDENTIFIED BY prient; USING 'SBYS' ； 即可访问sybase 数据库。 需要注重的是，sybase数据库的表名，字段名，假如是小写的，那么在oracle里访问的时候要加上双引号''如：SQL〉select 'a' from 'b'@sybs;