Read-Time CDF in Delta Lake

Traditionally, enabling Change Data Feed (CDF) in Delta Lake incurs a "write tax"—increasing storage costs and latency to materialize changes during ingestion.In this session, we introduce Read-Time CDF, a new architecture that unlocks zero-overhead writes by deferring change computation to query time. By leveraging the new unified CDC interface in Spark Data Source V2 and Delta’s Row Tracking, users can now query row-level changes without ever explicitly enabling delta.enableChangeFeed.