環境：oracle 11.2.0.1.0 RHEL5.3 64bit mysql Server version: 5.5.9
1：下載[ODBC Driver Manager] unionODBC2.2.14,解壓後放入/u01/app/tools/unionodbc 目錄下
[oracle@wonder tools]$ ls /u01/app/tools/unionodbc/
bin include lib
2：下載mysql-connector-odbc-3.51.30-linux-rhel5-x86-64bit.tar.gz解壓重命名到my5
[oracle@szmlserver12_32 tools]$ ls /u01/app/tools/
my5 odbc.ini unionodbc
3：配置 ODBC data source for MySQLConnector/ODBC driver
[oracle@wonder tools]$ cat /u01/app/tools/odbc.ini
[myodbc3]
Driver = /u01/app/tools/my5/lib/libmyodbc3.so
SERVER = 22.4.22.16
PORT = 3306
USER = soft
PASSWORD = Ugfd3589
DATABASE = estore
OPTION = 3
SOCKET =
4：設置環境變量
[oracle@wonder tools]$ cat ~/.bash_profile
PATH=$PATH:$HOME/bin
export PATH
export ORACLE_BASE=/u01/app
export ORACLE_HOME=/u01/app/oracle
export ORACLE_SID=hidb
export LANG=en
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/u01/app/tools/unionodbc/lib
export ODBCINI=/u01/app/tools/odbc.ini
export PATH=$ORACLE_HOME/bin:$PATH:/u01/app/tools/unionodbc/bin
紅色爲新增部分
5：測試連接成功
[oracle@wonder tools]$ isql myodbc3 -v
+---------------------------------------+
| Connected! |
| |
| sql-statement |
| help [tablename] |
| quit |
| |
+---------------------------------------+
SQL>
6：配置listener.ora
[grid@wonder ~]$ cat /u01/app/11.2.0/grid/network/admin/listener.ora
# listener.ora Network Configuration File: /u01/app/11.2.0/grid/network/admin/listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = wonder.easou.com)(PORT = 1521))
)
)
ADR_BASE_LISTENER = /u01/app/11.2.0
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER=ON # line added by Agent
SUBSCRIBE_FOR_NODE_DOWN_EVENT_LISTENER=OFF
SID_LIST_LISTENER=
(SID_LIST=
(SID_DESC=
(SID_NAME= myodbc3)
(ORACLE_HOME= /u01/app/oracle)
(PROGRAM = dg4odbc)
(ENVS=LD_LIBRARY_PATH=/u01/app/oracle/bin:/u01/app/tools/unionodbc/lib:/u01/app/tools/my5/lib)
)
)
7:配置tnsnames.ora,最後增加如下內容
myodbc3=
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SID = myodbc3)
)
(HS = OK)
)
8：配置HS
[oracle@wonder tools]$ cat /u01/app/oracle/hs/admin/initmyodbc3.ora
HS_FDS_CONNECT_INFO = myodbc3
HS_FDS_TRACE_LEVEL = off
HS_FDS_SHAREABLE_NAME = /u01/app/tools/unionodbc/lib/libodbc.so
HS_LANGUAGE=american_america.we8iso8859p1
HS_NLS_NCHAR=UCS2
#
# ODBC specific environment variables
#
set ODBCINI= /u01/app/tools/odbc.ini
9：重啓監聽
[grid@wonder ~]$ lsnrctl stop
[grid@wonder ~]$ lsnrctl start
10：配置DBLINK
create database link myodbc connect to "soft" identified by "Ugfd3589" using 'myodbc3'; --前面要雙引號纔不報錯
SQL> select count(*) from "acct_user"@myodbc;
COUNT(*)
----------
13
但是發現 select * from "acct_user"@myodbc 時，只會顯示一條數據，暈倒了，經google發現，通過更新驅動可以得到解決
下面的步驟是在上面的基礎上更換了最新ODBC 5.5.2解決了問題，以及一oracle主機連接2個mysql服務器例子：
下載mysql-connector-odbc-5.2.2-linux-glibc2.3-x86-64bit.tar
http://www.mysql.com/downloads/connector/odbc/#downloads
1:更換配置odbc.ini
[oracle@wonder hs]$ cat /u01/app/tools/odbc.ini
[mysql203]
Driver = /u01/app/tools/my5/lib/libmyodbc5w.so
SERVER = 120.2.93.3
PORT = 3306
USER = search_wei
PASSWORD = aaaa
DATABASE = search_wei
OPTION = 3
SOCKET =
[mysql213]
Driver = /u01/app/tools/my5/lib/libmyodbc5w.so
SERVER = 125.91.0.213
PORT = 3306
USER = droid
PASSWORD = bbbb
DATABASE = droid
OPTION = 3
SOCKET =
2： hs/admin 中
[oracle@wonder hs]$ ls admin/
extproc.ora initmysql203.ora listener.ora.sample
initdg4odbc.ora initmysql213.ora tnsnames.ora.sample
[oracle@wonder hs]$ cat admin/initmysql213.ora
HS_FDS_CONNECT_INFO = mysql213
HS_FDS_TRACE_LEVEL = debug
HS_FDS_SHAREABLE_NAME = /u01/app/tools/unionodbc/lib/libodbc.so
HS_LANGUAGE=american_america.we8iso8859p1
HS_NLS_NCHAR=UCS2
#SELECT NULL COLUMN
HS_FDS_SQLLEN_INTERPRETATION = 32
#DIRECT ACESS MYSQL INT COLUM
HS_FDS_FETCH_ROWS=1
set ODBCINI= /u01/app/tools/odbc.ini
[oracle@wonder hs]$ cat admin/initmysql203.ora
HS_FDS_CONNECT_INFO = mysql203
HS_FDS_TRACE_LEVEL = debug
HS_FDS_SHAREABLE_NAME = /u01/app/tools/unionodbc/lib/libodbc.so
HS_LANGUAGE=american_america.we8iso8859p1
HS_NLS_NCHAR=UCS2
set ODBCINI= /u01/app/tools/odbc.ini
3： tnsnames.ora
mysql213=
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SID = mysql213)
)
(HS = OK)
)
mysql203=
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SID = mysql203)
)
(HS = OK)
)
4： listener.ora
SID_LIST_LISTENER=
(SID_LIST=
(SID_DESC=
(SID_NAME= mysql203)
(ORACLE_HOME= /u01/app/oracle)
(PROGRAM = dg4odbc)
(ENVS=LD_LIBRARY_PATH=/u01/app/oracle/bin:/u01/app/tools/unionodbc/lib:/u01/app/tools/my5/lib)
)
(SID_DESC=
(SID_NAME= mysql213)
(ORACLE_HOME= /u01/app/oracle)
(PROGRAM = dg4odbc)
(ENVS=LD_LIBRARY_PATH=/u01/app/oracle/bin:/u01/app/tools/unionodbc/lib:/u01/app/tools/my5/lib)
)
)
5：重啓監聽
6：分別建立到3和203的dblink，驗證通過
create database link mysql203 connect to "search_wei" identified by "aaaa" using 'mysql203';
select * from "t_info_stat"@mysql203;
SQL> create database link mysql213 connect to "droid" identified by "bbbb" using 'mysql213';
select * from "ums_module"@mysql213;
哈哈！大功搞成！