SCD in Streaming

Concepts: paScdPipeline

What They Want to Hear 'In streaming, SCD Type 2 becomes a stateful operation. Each change event is compared against the current state in a key-value store. If the tracked attributes differ, the consumer emits a close event for the old version and an open event for the new version. The challenge is ordering: out-of-order events can close a row that was already updated by a later event. I handle this with event-time ordering and a grace period before finalizing row closures.' This is the answer that shows you understand the ordering problem that makes streaming SCD fundamentally harder than batch.