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Ora2pg establishes itself as an indispensable open‑source tool for migrating Oracle databases to PostgreSQL. Developed in Perl, it can automatically analyse, extract, and convert Oracle schemas, data, and SQL code into a PostgreSQL‑compatible format.
In this review we will examine its features in depth, understand the problems it solves, analyse use cases, and compare it with other market solutions.
According to the official project documentation and the resources available on Ora2pg and PostgreSQL, Ora2pg is widely used in large‑scale open‑source migration projects.
What problems does Ora2pg solve?
Enterprises using Oracle often face several difficulties:
- High license costs
- Vendor lock‑in
- Complexity of migrations to open‑source databases
- Risks associated with manual data and code conversion
Ora2pg addresses these issues by offering:
- A free open‑source solution
- Advanced automation of conversions
- A significant reduction of human errors
- Compatibility with many Oracle versions
Thus, it eases the transition to PostgreSQL, while ensuring better control over costs and infrastructure.
Key features and capabilities
Ora2pg provides a comprehensive set of features aimed at IT professionals.
Main features
- Extraction of Oracle schemas, tables, indexes, views, triggers
- Automatic SQL conversion to PostgreSQL
- Data migration with handling of large volumes
- Compatibility analysis between Oracle and PostgreSQL
- Support for PL/SQL stored procedures
Technical capabilities
- Interface : Command‑line usage; configuration via plain‑text files
- Performance : Optimised processing for large databases
- Customisation : Fine‑grained configuration through advanced parameters
- Security : Secure connections to databases; technical support via documentation and external contributions
Feature table
| Feature | Description |
|---|---|
| Data migration | Full or partial data transfer |
| SQL conversion | Automatic transformation of Oracle code |
| Compatibility audit | Gap analysis from Oracle to PostgreSQL |
| Multi‑format export | SQL, CSV, COPY |
How to install and configure?
Installation of Ora2pg is relatively straightforward for a system administrator.
Installation steps
- Install Perl and the required modules.
- Download Ora2pg from the official GitHub repository.
- Configure the ora2pg.conf file.
- Test the connection to the Oracle database.
- Run extraction and conversion.
Sample configuration
- Set Oracle connection parameters.
- Choose the objects to migrate.
- Define the desired export type.
The official documentation recommends testing on a pre‑production environment before any critical migration.
Use cases for Ora2pg
Ora2pg is employed in many professional contexts:
- Complete migration of an Oracle system to PostgreSQL
- Feasibility audit for a migration project
- Progressive conversion of legacy applications
- Reduction of IT infrastructure costs
Concrete example:
- An IT company can use Ora2pg to migrate an Oracle database to PostgreSQL, cut license fees, and rely on an active open‑source community to increase infrastructure flexibility.
Comparison with alternatives
| FEATURE | Ora2pg | AWS DMS | SQLines |
|---|---|---|---|
| Open source | ✅ | ❌ | ❌ |
| Automation | ✅ | ✅ | ✅ |
| Oracle support | ✅ | ✅ | ✅ |
| PL/SQL conversion | ✅ | ❌ | Partial |
| Cost | Free | Paid | Paid |
Advantages and disadvantages
| Advantages | Disadvantages |
|---|---|
| ✅ Free and open source | ❌ Requires technical expertise |
| ✅ Powerful for Oracle migrations | ❌ Command‑line‑only interface |
| ✅ Highly configurable | ❌ Documentation can be complex |
Conclusion
Ora2pg primarily targets developers, system administrators, and IT specialists who need an efficient way to migrate Oracle databases to PostgreSQL.
Thanks to its rich functionality, open‑source model, and ability to automate complex tasks, it is a robust solution for migration projects and fully aligns with an open‑source service philosophy. However, it does demand a certain level of technical expertise to be fully leveraged.
In short, Ora2pg is an excellent choice for organisations looking to lower costs while adopting a modern PostgreSQL‑based infrastructure.
