Event Sourcing: set-and-remove-based bi-temporal events

Part twelve of a series on event sourcing explores set-and-remove-based bi-temporal events, contrasting them with the previously covered lifetime (create-update-delete) variant. These events model timelines where data is assigned and removed over time rather than tracking a thing's full lifecycle. A key challenge introduced is the insert vs. override projection problem: when a new event is added with an earlier effective date than an existing event, the system must decide whether the new event overrides all later events or is inserted between them, preserving the later event's effect. Both behaviors are valid depending on context, so the projection must be configurable. A concrete example using organisational unit calendars in F# illustrates how to configure set-and-remove projection with override behavior.

Nguồn: https://www.planetgeek.ch/2026/07/07/event-sourcing-set-and-remove-based-bi-temporal-events. 8sync News chỉ tóm tắt và dẫn link; bản quyền nội dung thuộc tác giả và nguồn gốc.

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