ORACLE 9i連接SYBASE的透明網關的配置

Oracle實現異種數據庫連接服務的技術叫做透明網關（Transparent Gateway）。

目前Oracle利用透明網關可以實現和SQL Server、Sybase、DB2等多種主流數據庫的互聯。

現在通過Oracle訪問Sybase數據庫，把配置Oracle9i TRANSPARENT GATEWAY FOR Sybase的步驟寫成文檔，供需要的網友參考！

配置TRANSPARENT GATEWAY FOR Sybase步驟

1.oracle所在服務器上安裝Sybase clIEnt（或者在同一台server上安裝Oracle、sybase服務器）確保能夠訪問Sybase數據庫

2.安裝TRANSPARENT GATEWAY FOR SYBASE選件，要用自定義安裝。正確選擇Sybase的安裝目錄

3.選擇一個sid字符串准備賦給Sybase數據庫。如：tg4sybs設置Sybase的dll路徑到環境變量PATH（這一步很重要）

4.修改初始化文件，默認的是：

Oracle_HOME\tg4sybs\admin\inittg4sybs.ora

設置參數

HS_FDS_CONNECT_INFO

格式：HS_FDS_CONNECT_INFO= server_name. database_name[,INTERFACE= interface_file]

server_name. database_name是大小寫敏感的。

INTERFACE可選

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.tax
HS_FDS_TRACE_LEVEL=OFF
HS_FDS_RECOVERY_ACCOUNT=RECOVER
HS_FDS_RECOVERY_PWD=RECOVER
#
# Environment variables required for Sybase
#
set SYBASE=d:\Sybase

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

上例中

server_name是migration_serv

database_name是tax

5.配置Oracle網絡服務的listener,配置文件是：listener.ora

默認路徑：Oracle_HOME\network\admin

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選擇的sid字符串

oracle_home_directory是Oracle_HOME

tg4sybs若是Sybase是特定的。如果是其他數據庫，會不同。

例子如下：

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

(SID_DESC=
(SID_NAME=tg4sybs)
(ORACLE_HOME = D:\Oracle\ora92)
(PROGRAM=tg4sybs)
)

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

6.停止監聽

lsnrctl stop

重新啟動監聽程序

lsnrctl start

7.配置Oracle server的tnsnames.ora使其能夠訪問Sybase

connect_descriptor=
(DESCRIPTION=
(ADDRESS=
(PROTOCOL=TCP)
(HOST= host_name)
(PORT= port_number)
)
(CONNECT_DATA=
(SID= gateway_sid))
(HS=OK))

connect_descriptor是連接串，任取，一般為sybs

host_name：Oracle server的name

port_number：Oracle監聽端口

gateway_sid就是3選擇的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" ；

即可訪問Sybase 數據庫。

需要注意的是，Sybase數據庫的表名，字段名，如果是小寫的，那麼在Oracle裡訪問的時候要加上雙引號""

如：

SQL〉select "a" from "b"@sybs;