IDUG EMEA 2026

Warehouse and data lakehouses are converging and Db2 is ready for this shift. Db2 Datalake tables enable access to open-format data stored on remote object storage directly from within the relational database, eliminating the need for complex ETL pipelines or data duplication. This session explores the technical architecture supporting both Hive (ODF) and Iceberg table formats, demonstrating how organizations can query PARQUET, ORC, AVRO, and TEXTFILE data alongside traditional Db2 tables in complex SQL queries while maintaining ACID properties where needed. Attendees will learn implementation strategies for converged warehouse architectures, performance optimization techniques, and real-world use cases where Datalake tables provide bidirectional data flow between relational databases and data lake / lakehouses.

Insert Time Clustering (ITC) tables are not an obscure feature in Db2 - many practitioners know them, and they do appear in logging, event, and similar append-oriented workloads. However, their practical design space is often underestimated, especially when the discussion stays at a high level and does not go into physical organization and concurrency details.
This session looks at ITC as a technical design choice rather than a theoretical table attribute. I will briefly position ITC within the Db2 table organization family and then focus on the internals that matter in practice: its MDC-derived physical layout, insert behavior, extent reuse, ordered access to rows in their natural arrival sequence, and the locking patterns taken on pages and extents during insert, scan, and processing activity. These details are not just implementation trivia - they directly determine whether ITC is a good fit for a given workload.
The talk will compare ITC with APPEND mode for FIFO-style patterns suc

This session will cover the new features in Db2 12.1 security, covering 12.1.3, 12.1.4 and 12.1.5. Attend to hear about new auditing capabilities, including audit to cloud object storage, and directly to CSV files. You will also learn about new JWT authentication enhancements features online key retrieval. 12.1.5 sees the completion of the reduce file permission feature started in 12.1.2 that really locks down a Db2 instance. You will also hear about new Quantum Safe Crypto support in TLS.

SQL is a very powerful language and can get complex. There are many ways of writing semantically equivalent queries.SQL SQL may be written by database users or ncluding external tools and these may not always be the most suitable for the Db2 engine for performance as written. The Query Rewrite component in Db2 helps towards simplifying this task for the user or external toolThe Query Rewrite (one of two optimizer components, the other being the Plan Optimizer) automatically rewrites queries within Db2 towards a better performing version for the Plan Optimizer and the Db2 execution engine.
This session delves into how AI is used to help the Query Rewrite component make better decisions. We present the challenges involved, how we tackle these challenges and touch on our next steps to transform the Query Rewrite component to exploit AI to make it even more powerful than it currently is.