CodeLLama Case Study: Successful PL/SQL to PostgreSQL Migration

Codellama PLSQL PostgreSQL

In the world of database management, migration projects can be both daunting and rewarding. One such case study that stands out is the successful migration of PL/SQL (Oracle’s procedural language extension for SQL) to PostgreSQL, undertaken by CodeLLama, a leading software development company. This blog dives deep into the challenges faced, strategies employed, and the ultimate success achieved in this migration journey, showcasing the intricacies of data type mapping and performance optimization that were pivotal in the successful transition.


CodeLLama, a renowned software development company based in Silicon Valley, has built a reputation for delivering innovative solutions and exceptional client services. With a team of experienced developers, database administrators, and technology experts, CodeLLama has been at the forefront of digital transformation initiatives for enterprises across various industries.

The client in question, a multinational corporation operating in the finance sector, had been relying on Oracle’s database solutions for several years. Their mission-critical applications, ranging from transaction processing systems to data analytics platforms, were heavily reliant on Oracle’s PL/SQL for business logic and database operations.

However, as the client’s business expanded globally and data volumes surged, they encountered several challenges with their existing Oracle infrastructure:

      • Cost Overheads: Oracle’s licensing costs were becoming increasingly prohibitive, especially as the client expanded into new markets and added more users to their systems.
      • Vendor Lock-in: Dependency on Oracle’s proprietary technologies resulted in vendor lock-in, limiting the client’s flexibility in adopting alternative database solutions.
      • Scalability Concerns: Scaling Oracle databases to accommodate growing data volumes and user loads posed significant challenges, leading to performance bottlenecks and resource constraints.
      • Innovation Requirements: The client sought to embrace modern database technologies that offered greater agility, scalability, and cost-effectiveness to drive innovation and digital transformation initiatives.

These challenges prompted the client to explore alternative database platforms, eventually leading to the decision to migrate from Oracle’s PL/SQL to PostgreSQL, a move that aligned with their strategic goals of cost optimization, scalability, and vendor independence.

Challenges Faced

In addition to the broader industry challenges, CodeLLama encountered several specific obstacles during the PL/SQL to PostgreSQL migration project:

      • Legacy Codebase Complexity: The client’s extensive codebase, accumulated over years of development, contained complex PL/SQL procedures, triggers, and functions, requiring careful analysis and refactoring.
      • Data Integrity and Consistency: Ensuring data integrity and consistency during the migration process, especially when dealing with large volumes of transactional data and complex database relationships.
      • Regulatory Compliance: Adhering to regulatory requirements and industry standards throughout the migration to ensure data security, privacy, and compliance.
      • Downtime Minimization: Minimizing downtime and service disruptions during the migration cutover phase to avoid impacting business operations and customer experience.
      • Skillset Transition: Facilitating a smooth transition for developers and administrators accustomed to Oracle’s PL/SQL to adapt to PostgreSQL’s PL/pgSQL and database management paradigms.

Addressing these challenges required a strategic approach, deep technical expertise, and collaboration between CodeLLama’s team and the client’s IT stakeholders to achieve a seamless and successful migration.

Strategies Employed

To address these challenges effectively, CodeLLama devised a comprehensive migration strategy:

      • Code Analysis: Conducted a thorough analysis of the existing PL/SQL codebase to identify syntax differences, deprecated features, and potential areas of optimization.
      • Data Type Mapping: Developed custom scripts and mapping guides to map data types between Oracle and PostgreSQL, handling conversions where direct mappings were not feasible.
      • Migration Tools: Utilized specialized migration tools such as DMAP(Database Migration Acceleration Platform) to automate schema conversion, reducing manual effort and minimizing errors.
      • Procedure and Function Conversion: Rewrote stored procedures and functions in PL/pgSQL, ensuring equivalent functionality and optimizing PostgreSQL’s execution environment.
      • Performance Tuning: Conducted performance tuning exercises post-migration, optimizing SQL queries, indexing strategies, and database configurations for optimal performance on PostgreSQL.
      • Testing and Validation: Implemented a rigorous testing framework, including unit tests, integration tests, and performance benchmarks, to validate the migrated database’s correctness and performance.

Results and Benefits

The successful migration of PL/SQL to PostgreSQL yielded significant benefits for CodeLlama’s client:

      • Cost Savings: PostgreSQL’s open-source nature and lower licensing costs resulted in substantial cost savings for the client.
      • Scalability and Flexibility: Leveraging PostgreSQL’s scalability and flexibility allowed for easier management of growing data volumes and evolving business requirements.
      • Vendor Independence: Reduced dependency on Oracle and vendor lock-in, providing the client with more freedom and flexibility in choosing their database solutions.
      • Improved Performance: Optimizations implemented during the migration process led to improved database performance and response times.
      • Community Support: Access to PostgreSQL’s vibrant open-source community for ongoing support, updates, and enhancements.


The CodeLLama case study exemplifies how meticulous planning, strategic execution, and leveraging the right tools can lead to a successful migration from PL/SQL to PostgreSQL. By overcoming challenges, optimizing performance, and delivering tangible benefits, CodeLLama not only ensured a seamless transition for their client but also positioned them for long-term success in a dynamic database landscape.

Ready to Migrate Your Database?

If you’re inspired by CodeLLama’s successful PL/SQL to PostgreSQL migration and are ready to embark on your database migration journey, Newt Global is here to help. Our world-class product, Newt Global DMAP, enables mass migration of Oracle databases to cloud-native PostgreSQL—faster, better, and cheaper.

Contact us today at or visit to learn more about how Newt Global DMAP can streamline your migration process and unlock the benefits of PostgreSQL for your business.

Don’t let database challenges hold you back. Partner with Newt Global and experience a seamless transition to PostgreSQL, empowering your organization with scalability, cost savings, and innovation.