Oracle to PostgreSQL Migration — Cut Licensing Costs by 70%+

Ahmed alkhair

Ahmed alkhair

— 3 min read

Oracle to PostgreSQL Migration: How Worlber Cuts Licensing Costs by 70%+

Enterprise teams in Saudi Arabia and the GCC increasingly choose to migrate from Oracle to PostgreSQL to reduce license spend, avoid vendor lock-in, and align with Vision 2030 cloud-first initiatives. In this post I outline Worlber\u2019s proven approach to Oracle to PostgreSQL migration: technical phases, tools, risk controls, and how we achieve 70%+ licensing cost reductions while preserving business continuity and PDPL compliance.

Why migrate from Oracle to PostgreSQL?

Organizations still on Oracle face rising license and support fees, complex upgrade cycles, and architecture constraints. PostgreSQL delivers enterprise-grade features, extensibility, and a vibrant open-source ecosystem that cuts total cost of ownership (TCO). In the Saudi market, reduced license spend frees budget for cloud transformation and local compliance (PDPL, NCA cybersecurity), accelerating Vision 2030 digital initiatives.

Worlber\u2019s migration strategy — practical and low-risk

Our migration methodology is pragmatic, repeatable, and built for live systems. We break projects into eight phases and apply automation and tools to speed each step.

  • Assessment & inventory: profile schemas, data volume, PL/SQL usage, dependencies, and performance baselines.
  • Proof of concept (PoC): convert a representative schema, migrate a subset of data, and run QA workloads.
  • Schema conversion: map types, constraints, indexes, sequences, and PL/SQL to PL/pgSQL where possible.
  • Data migration: bulk and change-data capture (CDC) strategies to minimize downtime.
  • Application adaptation: SQL adjustments, driver and connection pool tuning.
  • Performance engineering: explain plan comparison, indexing, partitioning and configuration tuning.
  • Cutover & validation: final CDC sync, transactional cutover, and smoke tests.
  • Operational hardening: monitoring, backups, high availability, and security controls.

Tools and code snippets we use

We combine open-source tooling with enterprise-grade options. Example tools: ora2pg for schema conversion, pg_dump/pg_restore for targeted exports, logical replication / Debezium for CDC, and Carbonite Double-Take for near-zero downtime migrations when cross-platform replication is required.

Sample ora2pg configuration to export schema and map data types:

## /etc/ora2pg/ora2pg.confORACLE_DSN dbi:Oracle:host=oracle-host;sid=ORCL;port=1521ORACLE_USER scottORACLE_PWD tigerTYPE TABLE,VIEW,FUNCTION,PROCEDUREOUTPUT /tmp/ora2pg_outputPG_SCHEMA publicDATA_LIMIT 100000

Simple data load using COPY for bulk load into PostgreSQL:

# Export from Oracle (CSV) and load to PostgreSQLsqlplus -s scott/tiger@ORCL @export_table.sqlpsql -h pg-host -U pguser -d appdb -c "\copy schema.table FROM '/tmp/table.csv' WITH (FORMAT csv, HEADER true)"

For zero-downtime patterns we often use Carbonite Double-Take (for heterogeneous replication) or logical replication with a transactional cutover. Example: create publication and subscription for logical replication:

-- On PostgreSQL master (target):CREATE PUBLICATION migrate_pub FOR ALL TABLES;

PL/SQL to PL/pgSQL: practical tips

Complete automatic conversion is rarely perfect. We identify patterns and convert critical routines first. Typical steps include:

  • Replace packages with schema-qualified functions and views.
  • Rewrite cursors and bulk processing using set-based SQL or PL/pgSQL FOR loops.
  • Use extensions (pg_partman, pgcrypto) to cover Oracle-specific features.

Short example: simple PL/SQL loop converted to PL/pgSQL

-- Oracle PL/SQLFOR r IN (SELECT id, qty FROM orders WHERE processed = 0) LOOP  UPDATE orders SET processed=1 WHERE id=r.id;END LOOP;

Enterprise requirements: security, compliance, high availability

For customers bound by PDPL and NCA controls we integrate encryption-at-rest, data masking, and auditing. PGEE (PostgreSQL Enterprise Edition) is a natural fit where organizations require Transparent Data Encryption, masking, and stored procedure protection. For high availability and automated failover we offer Patroni-based clusters and Quick Deploy to provision hardened PostgreSQL instances in your preferred cloud or on-premise environment.

Cost and timeline — real-world expectations

Typical medium-to-large migrations achieve 70%+ reduction in licensing and annual support costs versus Oracle. Real savings depend on current Oracle pack usage (Partitioning, RAC, etc.). A common timeline:

  • Assessment & PoC: 2\u20134 weeks
  • Schema & initial data migration: 4\u20136 weeks
  • Application adaptation & performance tuning: 4\u20136 weeks
  • Cutover & stabilization: 1\u20132 weeks

Worlber accelerates provisioning using Quick Deploy and reduces cutover risk with Carbonite for high-stakes migrations. We also provide 24/7 support for production stabilization where required.

Case study highlights (anonymized)

A regional fintech migrated a 5TB OLTP system to PostgreSQL. After schema conversion and selective query refactoring, they reduced annual licensing and support costs by ~75% and improved average query latency by 20% after targeted indexing and parameter tuning. We supported data residency and PDPL compliance with encryption and role-based audit trails.

Next steps for your migration

If you evaluating an Oracle to PostgreSQL migration, start with a focused assessment. Worlber offers a PDPL-aware migration package: inventory, PoC, cost estimate, and a migration roadmap aligned with Saudi public and private sector requirements.

Contact Worlber to run a free initial assessment. We\u2019ll identify quick wins, licensing impact, and a realistic migration timeline tailored to your environment.

Ready to Transform Your Database Infrastructure?

Worlber helps companies across Saudi Arabia and the Middle East build reliable, secure, and cost-effective database solutions.

📧 Email us: contactus@worlber.com

🌐 Visit: worlber.sa/contact

📞 Call: Talk to our database experts today

Worlber — Your trusted PostgreSQL partner in the Middle East

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