在Oracle上建dblink连接远程MySQL数据库

Oracle：系统RedHat 5.5 数据库：11.2.0.1
MySQL：系统CentOS 6.3 数据库：5.6.21

1.先装 mysql-connector-odbc和unixODBC
[root@rac1 ~]# rpm -qa | grep mysql
mysql-5.0.77-4.el5_4.2
mysql-5.0.77-4.el5_4.2
mysql-connector-odbc-5.1.13-1.rhel5

[root@rac1 ~]# rpm -qa | grep ODBC
unixODBC-devel-2.2.11-7.1
unixODBC-2.2.11-7.1
unixODBC-devel-2.2.11-7.1
unixODBC-2.2.11-7.1

2.配置/etc/odbc.ini
[myodbc3]
Driver = /usr/lib64/libmyodbc5.so
Description = MySQL ODBC 5.1 Driver DSN
SERVER = 192.1.1.200
PORT = 3306
USER = bi
Password = 123456
Database = chanpin
OPTION = 3
SOCKET =
charset = utf8

3.配置/etc/odbcinst.ini
[MySQL]
Description = ODBC for MySQL
Driver = /usr/lib64/libmyodbc5.so
Setup = /usr/lib64/libodbcmyS.so
FileUsage = 1

4.测试连接
[root@rac1 ~]# isql myodbc3 -v
+---------------------------------------+
| Connected!                         |
|                                    |
| sql-statement                      |
| help [tablename]                   |
| quit                               |
+---------------------------------------+

5.配置Oracle环境变量
[root@localhost ~]# vim /etc/profile
export ORACLE_BASE=/u01/app/oracle
export GRID_HOME=/u01/grid
export ORACLE_HOME=$ORACLE_BASE/product/11.2.0/db_1
export ORACLE_SID=rac1
export BASE_PATH=/usr/sbin:$PATH
export PATH=$ORACLE_HOME/bin:$BASE_PATH:/usr/bin
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib:/usr/local/lib:$ORACLE_HOME/hs/lib:/usr/lib64
export CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib
export ODBCINI=/etc/odbc.ini;
export ODBCSYSINI=/etc;
export ODBCINSTINI=/etc/odbc.ini;

6.配置监听
listener.ora:
LISTENER =
(DESCRIPTION_LIST =
　　(DESCRIPTION =
　　　　(ADDRESS = (PROTOCOL = TCP)(HOST = 192.1.1.100)(PORT = 1522))
　　)
)
SID_LIST_LISTENER=
(SID_LIST=
　　(SID_DESC=
　　　　(PROGRAM = dg4odbc)
　　　　(SID_NAME= myodbc3)
　　　　(ORACLE_HOME= /u01/app/oracle/product/11.2.0/db_1)　　(ENVS=LD_LIBRARY_PATH=/u01/app/oracle/product/11.2.0/db_1/lib:/lib:/usr/lib:/usr/local/lib:/u01/app/oracle/product/11.2.0/db_1/hs/lib:/usr/lib64)
　　)
)

tnsname.ora:
myodbc3=
(DESCRIPTION =
　　(ADDRESS = (PROTOCOL = TCP)(HOST = 192.1.1.100)(PORT = 1522))
　　(CONNECT_DATA =
　　　　(SID = myodbc3))
　　　　(HS = OK)
　　)
)

7.配置odbc监听
路径：$ORACLE_HOME/hs/admin
注意：名字要跟odbc配置的名字一样 我这里是myodbc3
[oracle@rac1 admin]$ cat initmyodbc3.ora
HS_FDS_CONNECT_INFO = myodbc3
HS_FDS_TRACE_LEVEL = ON
HS_FDS_TRACE_FILE_NAME = odbc_test.log
HS_FDS_TRACE_LEVEL = 4
HS_FDS_SHAREABLE_NAME = /usr/lib64/libodbc.so
HS_FDS_SUPPORT_STATISCTICS = FALSE
HS_LANGUAGE = AMERICAN_AMERICA.WE8ISO8859P1
HS_FDS_SQLLEN_INTERPRETATION=32
set ODBCINI = /etc/odbc.ini

8.测试下监听
[oracle@rac1 admin]$ tnsping myodbc3
TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 25-NOV-2014 03:02:16
Copyright (c) 1997, 2009, Oracle. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.1.1.100)(PORT = 1522)) (CONNECT_DATA = (SID = myodbc3)) (HS = OK))
OK (0 msec)

9.创建dblink
SQL> create public database link myodbc connect to "bi" identified by "123456" using 'myodbc3';
SQL> select count(*) from "t_user"@myodbc;
COUNT(*)
----------
53980

转载自：https://blog.csdn.net/dbanote/article/details/10488581