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Leaving Oracle and SQL Server for PostgreSQL: What Could Go Wrong

Event: PGConf Europe 2026

Location: Valencia

Room: SM1-A

Dates: October 20, 2026 – October 23, 2026

Presentation: October 21, 2026 , 14:35

Link: On event website

Speakers: Avi Vallarapu, Michal Nosek

Moving away from Oracle or SQL Server is rarely just a database migration. The database is tied to applications, data models, integrations, operational processes, and years of database-specific decisions. That is where most of the complexity, risk, and unexpected cost comes from. The goal is not to argue that every Oracle or SQL Server workload should move to PostgreSQL. It is to show how to understand the work involved, reduce surprises, and make the migration a business decision rather than a leap of faith. If migrating to PostgreSQL is on your horizon, this talk is for you. We’ll take a look at what it really takes to make the move, and what to understand before migration begins. What will actually move cleanly? Where are the compatibility gaps? What needs to change in the application? And does the expected cost saving justify the effort? The practical work starts with assessing Oracle and SQL Server environments, planning migrations at scale, and validating the result along the way

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Leaving Oracle and SQL Server for PostgreSQL: What Could Go Wrong

Speakers

Avi Vallarapu

Avi Vallarapu

Avinash Vallarapu is the CEO and Chief of Products at HexaCluster, where he leads the development of PostgreSQL extensions and an end-to-end database migration tool called HexaRocket. Before HexaCluster, Avi founded MigOps and served as a PostgreSQL Tech Lead at Percona, and as a Database Architect at Dell. Avi is a frequent conference speaker, presenting at dozens of events around the world. He has spoken at four past Percona Live conferences, delivering 15+ hours of Percona Live sessions to date, and continues to share practical, field-tested lessons from real customer transformations.

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Michal Nosek

Michal Nosek

Michal Nosek is a Senior Enterprise Architect at Percona with over a decade of experience across roles in software engineering, business analysis, and technical consulting. He combines deep technical knowledge with a focus on aligning database technologies to business goals, helping Percona’s global customers design effective open source data strategies. Michal holds a BS in Computer and Information Science from the Cracow University of Technology and lives in Gdansk, Poland, where he enjoys traveling and windsurfing.

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