本文只介绍如何使用Ora2Pg从Oracle导出数据到PostgreSQL，但是在操作前需要先安装先决软件DBD::Oracle、DBI、Ora2Pg。
安装参考：
安装Ora2Pg完成会在/etc目录下生成一个ora2pg目录里面有使用Ora2Pg的配置文件。
1、在Oracle上创建测试用户并创建测试表
sys@ORCL>create user zhaoxu identified by zhaoxu;User created.sys@ORCL>grant dba to zhaoxu;Grant succeeded.sys@ORCL>conn zhaoxu/zhaoxu;Connected.zhaoxu@ORCL>create table emp as select * from scott.emp;Table created.zhaoxu@ORCL>select * from emp; EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO---------- ------------------------------ --------------------------- ---------- ------------------- ---------- ---------- ---------- 7369 SMITH CLERK 7902 1980-12-17 00:00:00 800 20 7499 ALLEN SALESMAN 7698 1981-02-20 00:00:00 1600 300 30 7521 WARD SALESMAN 7698 1981-02-22 00:00:00 1250 500 30 7566 JONES MANAGER 7839 1981-04-02 00:00:00 2975 20 7654 MARTIN SALESMAN 7698 1981-09-28 00:00:00 1250 1400 30 7698 BLAKE MANAGER 7839 1981-05-01 00:00:00 2850 30 7782 CLARK MANAGER 7839 1981-06-09 00:00:00 2450 10 7788 SCOTT ANALYST 7566 1987-04-19 00:00:00 3000 20 7839 KING PRESIDENT 1981-11-17 00:00:00 5000 10 7844 TURNER SALESMAN 7698 1981-09-08 00:00:00 1500 0 30 7876 ADAMS CLERK 7788 1987-05-23 00:00:00 1100 20 7900 JAMES CLERK 7698 1981-12-03 00:00:00 950 30 7902 FORD ANALYST 7566 1981-12-03 00:00:00 3000 20 7934 MILLER CLERK 7782 1982-01-23 00:00:00 1300 1014 rows selected.
2、修改参数文件
[oracle@rhel6 ora2pg]$ cp /etc/ora2pg/ora2pg.conf /home/oracle/ora2pg/[oracle@rhel6 ora2pg]$ cd /home/oracle/ora2pg/[oracle@rhel6 ora2pg]$ vi ora2pg.conf [oracle@rhel6 ora2pg]$ cat ora2pg.conf ORACLE_HOME /u02/app/oracle/product/11.2.4/db1ORACLE_DSN dbi:Oracle:host=192.168.56.2;sid=orclORACLE_USER zhaoxuORACLE_PWD zhaoxuSCHEMA zhaoxuUSER_GRANTS 0DEBUG 0ORA_INITIAL_COMMANDEXPORT_SCHEMA 0CREATE_SCHEMA 1COMPILE_SCHEMA 0TYPE TABLE,INSERTOUTPUT output.sql
3、使用上面修改的参数导出数据
[oracle@rhel6 ora2pg]$ ora2pg -c ora2pg.conf [========================>] 1/1 tables (100.0%) end of scanning. [> ] 0/1 tables (0.0%) end of scanning. [========================>] 1/1 tables (100.0%) end of table export.[========================>] 14/1 rows (1400.0%) Table EMP (14 recs/sec)[========================>] 14/1 total rows (1400.0%) - (0 sec., avg: 14 recs/sec).[========================>] 1/1 rows (100.0%) on total estimated data (1 sec., avg: 1 recs/sec)[oracle@rhel6 ora2pg]$ cat output.sql -- Generated by Ora2Pg, the Oracle database Schema converter, version 17.6b-- Copyright 2000-2016 Gilles DAROLD. All rights reserved.-- DATASOURCE: dbi:Oracle:host=192.168.56.2;sid=orclSET client_encoding TO 'UTF8';\set ON_ERROR_STOP ONCREATE TABLE emp ( empno smallint, ename varchar(10), job varchar(9), mgr smallint, hiredate timestamp, sal decimal(7,2), comm decimal(7,2), deptno smallint) ;-- Generated by Ora2Pg, the Oracle database Schema converter, version 17.6b-- Copyright 2000-2016 Gilles DAROLD. All rights reserved.-- DATASOURCE: dbi:Oracle:host=192.168.56.2;sid=orclSET client_encoding TO 'UTF8';\set ON_ERROR_STOP ONBEGIN;INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7369,E'SMITH',E'CLERK',7902,'1980-12-17 00:00:00',800,NULL,20);INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7499,E'ALLEN',E'SALESMAN',7698,'1981-02-20 00:00:00',1600,300,30);INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7521,E'WARD',E'SALESMAN',7698,'1981-02-22 00:00:00',1250,500,30);INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7566,E'JONES',E'MANAGER',7839,'1981-04-02 00:00:00',2975,NULL,20);INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7654,E'MARTIN',E'SALESMAN',7698,'1981-09-28 00:00:00',1250,1400,30);INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7698,E'BLAKE',E'MANAGER',7839,'1981-05-01 00:00:00',2850,NULL,30);INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7782,E'CLARK',E'MANAGER',7839,'1981-06-09 00:00:00',2450,NULL,10);INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7788,E'SCOTT',E'ANALYST',7566,'1987-04-19 00:00:00',3000,NULL,20);INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7839,E'KING',E'PRESIDENT',NULL,'1981-11-17 00:00:00',5000,NULL,10);INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7844,E'TURNER',E'SALESMAN',7698,'1981-09-08 00:00:00',1500,0,30);INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7876,E'ADAMS',E'CLERK',7788,'1987-05-23 00:00:00',1100,NULL,20);INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7900,E'JAMES',E'CLERK',7698,'1981-12-03 00:00:00',950,NULL,30);INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7902,E'FORD',E'ANALYST',7566,'1981-12-03 00:00:00',3000,NULL,20);INSERT INTO emp (empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES (7934,E'MILLER',E'CLERK',7782,'1982-01-23 00:00:00',1300,NULL,10);COMMIT;
4、把生成的output.sql传到PostgreSQL服务器上
[oracle@rhel6 ora2pg]$ scp output.sql pguser@192.168.56.25:/home/pguser/pguser@192.168.56.25's password: output.sql 100% 2599 2.5KB/s 00:00
5、在PostgreSQL数据库上创建对应的数据库、用户和Schema
#创建数据库 zhaoxupostgres=# create database zhaoxu;CREATE DATABASEpostgres=# \l List of databases Name | Owner | Encoding | Collate | Ctype | Access privileges -----------+--------+----------+-------------+-------------+------------------- postgres | pguser | UTF8 | en_US.UTF-8 | en_US.UTF-8 | template0 | pguser | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/pguser + | | | | | pguser=CTc/pguser template1 | pguser | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/pguser + | | | | | pguser=CTc/pguser zhaoxu | pguser | UTF8 | en_US.UTF-8 | en_US.UTF-8 | zx | pguser | UTF8 | en_US.UTF-8 | en_US.UTF-8 | (5 rows)#创建用户 zhaoxu postgres=# create user zhaoxu superuser;CREATE ROLEpostgres=# \dg List of roles Role name | Attributes | Member of -----------+------------------------------------------------------------+----------- lx | Superuser, Cannot login | {} pguser | Superuser, Create role, Create DB, Replication, Bypass RLS | {} sq | Superuser, Create role, Create DB | {} zhaoxu | Superuser | {} zx | Superuser | {}#在zhaoxu库下创建Schema zhaoxupostgres=# \c zhaoxu zhaoxuYou are now connected to database "zhaoxu" as user "zhaoxu".zhaoxu=# create schema zhaoxu;CREATE SCHEMAzhaoxu=# \dn List of schemas Name | Owner --------+-------- public | pguser zhaoxu | zhaoxu(2 rows) 6、使用output.sql导入从Oracle导出的数据
[pguser@rhel7 ~]$ psql zhaoxu zhaoxu < output.sql SETCREATE TABLESETBEGININSERT 0 1INSERT 0 1INSERT 0 1INSERT 0 1INSERT 0 1INSERT 0 1INSERT 0 1INSERT 0 1INSERT 0 1INSERT 0 1INSERT 0 1INSERT 0 1INSERT 0 1INSERT 0 1COMMIT[pguser@rhel7 ~]$ psql zhaoxu zhaoxu psql (9.6.1)Type "help" for help.zhaoxu=# \d List of relations Schema | Name | Type | Owner --------+------+-------+-------- zhaoxu | emp | table | zhaoxu(1 row)zhaoxu=# select * from emp; empno | ename | job | mgr | hiredate | sal | comm | deptno -------+--------+-----------+------+---------------------+---------+---------+-------- 7369 | SMITH | CLERK | 7902 | 1980-12-17 00:00:00 | 800.00 | | 20 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 00:00:00 | 1600.00 | 300.00 | 30 7521 | WARD | SALESMAN | 7698 | 1981-02-22 00:00:00 | 1250.00 | 500.00 | 30 7566 | JONES | MANAGER | 7839 | 1981-04-02 00:00:00 | 2975.00 | | 20 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 00:00:00 | 1250.00 | 1400.00 | 30 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 00:00:00 | 2850.00 | | 30 7782 | CLARK | MANAGER | 7839 | 1981-06-09 00:00:00 | 2450.00 | | 10 7788 | SCOTT | ANALYST | 7566 | 1987-04-19 00:00:00 | 3000.00 | | 20 7839 | KING | PRESIDENT | | 1981-11-17 00:00:00 | 5000.00 | | 10 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 00:00:00 | 1500.00 | 0.00 | 30 7876 | ADAMS | CLERK | 7788 | 1987-05-23 00:00:00 | 1100.00 | | 20 7900 | JAMES | CLERK | 7698 | 1981-12-03 00:00:00 | 950.00 | | 30 7902 | FORD | ANALYST | 7566 | 1981-12-03 00:00:00 | 3000.00 | | 20 7934 | MILLER | CLERK | 7782 | 1982-01-23 00:00:00 | 1300.00 | | 10(14 rows)
数据导入完成。