ora2pg is a command-line utility that can be used to migrate an Oracle database to PostgreSQL. It is written in Perl and is typically installed using the cpan utility.
ora2pg works by exporting the data from an Oracle database using the expdp utility, converting the data to a format that is compatible with PostgreSQL, and then importing the data into a PostgreSQL database. It provides many options for customizing the migration process, including the ability to specify which tables, views, and sequences to include or exclude from the migration, as well as options for handling Oracle-specific data types and other Oracle-specific features.
Here is an example of how you might use ora2pg to migrate an Oracle database to PostgreSQL:
ora2pg -f SQL -o output.sql input.dmp
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import os
# Path to the Oracle dump file
oracle_dump_file = '/path/to/oracle/dump/file.dmp'
# Path to the output file that will be created by ora2pg
output_file = '/path/to/output/file.sql'
# Convert the Oracle dump file to a format that is compatible with PostgreSQL
os.system('ora2pg -f SQL -o {} {}'.format(output_file, oracle_dump_file))
# Import the data into PostgreSQL
os.system('psql -f {}'.format(output_file))
This command will convert the data in the Oracle dump file input.dmp to a format that is compatible with PostgreSQL and write the resulting SQL script to output.sql. You can then use the psql utility to import the data into a PostgreSQL database.
Overall, ora2pg is a useful tool for migrating data from an Oracle database to PostgreSQL. It can save a lot of time and effort compared to manually converting the data, and it provides many options for customizing the migration process to fit your specific needs and requirements.
