ClickHouse v26.6 Release Webinar

Alexey Milovidov

The ClickHouse v26.6 release webinar covers the summer release and 10-year open-source anniversary edition. Alexey Milovidov takes you through a dense set of new features — some small and practical, a few genuinely surprising — plus a live demo session with schema visualization, PNG rendering in the terminal, and an interactive help system that searches docs without leaving clickhouse-client.

• Streaming queries — new experimental SELECT ... FROM table STREAM syntax for real-time data monitoring, with aggregation windows on the roadmap
• Multi-stage distributed execution — hash joins, sorting, and group-by now support full distributed shuffle in both open source and ClickHouse Cloud
• Memory reservations — resource workloads let you assign memory budgets and priorities across query classes
• Hypothetical indexes — evaluate index effectiveness via EXPLAIN before committing to creation
• Embeddings + quantization — generate embeddings inside the DB with any model, then compress with Lloyd-Max quantization down to 1-bit
• ~50 performance optimizations including 2x faster ClickHouse Keeper, 64x faster complex queries with large column counts, and new sorting algorithms from recent academic work