最近在做ETL方面的项目，涉及到了从SQL Server数据库往Oracle数据库导数据的问题。网上很多都是使用Oracle Transparent Gateways 的文章，但是由于它不是免费的，所以还是决定使用Generic Connectivity先看看。文档大部分是从OWB的CaseStudy文档转过来的，有兴趣的也可以去看看官方文档。由于公司都是使用英文，就马马虎虎看吧。
Step1. Create a System DSN
Set up a System Data Source Name (DSN) using the Microsoft ODBC Administrator.
1. Select Start, followed by Programs, OWB_ORACLE_HOME, Network
Administration, and then Microsoft ODBC Administrator.
2. Navigate to the System DSN tab and click Add to create a System DSN.
3. Select Microsoft SQL Server as the driver for which you want to set up the data source.
4. Specify the name of the DSN as sqlsource
5. Test the connection
Step2. Create the Heterogeneous Services Initialization File
Create the initsqlserver.ora file in the $ORACLE_HOME/hs/admin directory
as follows:
HS_FDS_CONNECT_INFO = sqlsource
HS_FDS_TRACE_LEVEL = 0
HS_AUTOREGISTER = TRUE
HS_DB_NAME = hsodbc
Step3. Modify the listener.ora file
To set up the listener, modify the entries in the listener.ora file located in the $ORACLE_HOME/network/admin directory as follows:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = E:"oracle"product"10.2.0"db_1)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = sqlserver)
(ORACLE_HOME = E:"oracle"product"10.2.0"db_1)
(PROGRAM = hsodbc)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = CNDAL426VWIN.intl.intlroot.fid-intl.com)(PORT = 1521))
)
)
1. For the SID_NAME parameter, use the SID that you specified in Step 2 when
creating the initialization parameter file for the Heterogeneous Services.
2. Ensure that the ORACLE_HOME parameter value is the path to your Oracle home
directory.
3. The value associated with the PROGRAM keyword defines the name of the agent
executable.
Remember to restart the listener after making these modifications.
Step4. Create a Database link
1. Login AsiaDB database as DBA
2. Running script: alter system set global_names = false;
3. Running script:
CREATE DATABASE LINK "ASIAUAT.REGRESS.RDBMS.DEV.US.ORACLE.COM"
CONNECT TO ASIADB
IDENTIFIED BY ASIADB
USING '(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)
(HOST=LOCALHOST)(PORT=1521)))
(CONNECT_DATA=(SID=SQLSERVER))
(HS=OK)
)';
4. Test
Select * from “action_logs”@ASIAUAT.REGRESS.RDBMS.DEV.US.ORACLE.COM
Notes: using “” and same case with SQL Server object name.
