Walk a Schema Change Without Breaking Consumers
Handle an upstream schema change by detecting drift, preserving compatibility, and communicating the contract change.
Schema drift status became payment_state in the payments API. The raw load succeeded, but the revenue mart failed before the morning dashboard. The source changed shape. The warehouse contract should decide whether consumers feel that change. Change path Detect -> Absorb -> Announce Handle schema drift by detecting the source change, absorbing compatible changes in staging, and announcing true contract changes to consumers. Reflex Patch the final mart until it compiles. Consumers keep a stable interface unless meaning changes. A stable warehouse product absorbs source volatility at explicit boundaries. 01 Detect 02 Absorb 03 Announce Make drift visible The raw…
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