ora2og初始代码源自ora2pg，版本为release v21.1：https://github.com/darold/ora2pg/tree/v21.1。
Ora2Pg优秀特性
1、支持导出数据库绝大多数对象类型，包括表、视图、序列、索引、外键、约束、函数、存储过程等。
2、提供PL/SQL到PL/PGSQL语法的自动转换，一定程度避免了人工修正。
3、可生成迁移报告，包括迁移难度评估、人天估算。
4、可选对导出数据进行压缩，节约磁盘开销。
5、配置选项丰富，可自定义迁移行为。
openGauss-tools-ora2og-master下载地址：
https://gitee.com/opengauss/openGauss-tools-ora2og#https://gitee.com/link?target=https%3A%2F%2Fgithub.com%2Fdarold%2Fora2pg%2Ftree%2Fv21.1%25E3%2580%2582
安装DBI
#root用户下操作
yum install -y perl-ExtUtils-CBuilder perl-ExtUtils-MakeMaker
yum install perl-CPAN
yum -y install perl-DBI
安装 DBD-ORACLE
下载https://cpan.metacpan.org/authors/id/Z/ZA/ZARQUON/DBD-Oracle-1.90.tar.gz
tar -xvf DBD-Oracle-1.90.tar.gz
编译:
cd DBD-Oracle-1.90
perl Makefile.PL
make
make install
安装oracle-instantclient
-rwxr-xr-x 1 root root 53948820 May 8 17:30 oracle-instantclient19.23-basic-19.23.0.0.0-1.x86_64.rpm
-rwxr-xr-x 1 root root 614824 May 8 17:30 oracle-instantclient19.23-devel-19.23.0.0.0-1.x86_64.rpm
-rwxr-xr-x 1 root root 1525412 May 8 17:30 oracle-instantclient19.23-jdbc-19.23.0.0.0-1.x86_64.rpm
-rwxr-xr-x 1 root root 704164 May 8 17:30 oracle-instantclient19.23-sqlplus-19.23.0.0.0-1.x86_64.rpm
yum -y install oracle-instantclient19*
设置环境
export ORACLE_HOME=/usr/lib/oracle/19.23/client64
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH
openGauss-tools-ora2og-master.zip 安装
perl Makefile.PL PREFIX=<your_install_dir>
make && make install
# 设置环境变量，查看是否安装成功
export PERL5LIB=<source_code_dir>/lib
export PATH=$PATH:<your_install_dir>/usr/local/bin
ora2pg --help
[root@opengauss01 oramig]# ora2pg --help
Usage: ora2pg [-dhpqv --estimate_cost --dump_as_html] [--option value]
-a | --allow str : Comma separated list of objects to allow from export.
Can be used with SHOW_COLUMN too.
-b | --basedir dir: Set the default output directory, where files
resulting from exports will be stored.
-c | --conf file : Set an alternate configuration file other
创建迁移项目
ora2pg --init_project oramig
./oramig
├── config
│ ├── ora2pg.conf
│ └── ora2pg.conf.bak
├── data
├── export_schema.sh
├── import_all.sh
├── reports
│ ├── columns.txt
│ ├── report.html
│ └── tables.txt
├── schema
│ ├── dblinks
│ ├── directories
│ ├── functions
│ ├── grants
│ ├── mviews
│ ├── packages
│ ├── partitions
│ ├── procedures
│ ├── sequences
│ ├── synonyms
│ ├── tables
│ ├── tablespaces
│ ├── triggers
│ ├── types
│ └── views
└── sources
├── functions
├── mviews
├── packages
├── partitions
├── procedures
├── triggers
├── types
└── views
生成oramig目录创建迁移项目模板，包含导出脚本export_schema.sh、导入脚本import_all.sh、schema目录存放转化后对象ddl语句脚本、sources目录存储转化之前的PL/SQL语句脚本、data目录存放表数据、config目录存放配置文件ora2pg.conf、report存放迁移报告。
