Last Tuesday Stripe added an optional discount field

A medium Pipeline Design interview practice problem on DataDriven. Write and execute real pipeline design code with instant grading.

Domain

Pipeline Design

Difficulty

medium

Problem

Last Tuesday Stripe added an optional discount field. By Wednesday morning the curated fct_orders table silently double-counted discounts; three downstream teams discovered the breakage at different times because nobody was monitoring fct_orders. Apply the section's pipelines-as-products framing and declare the contract for fct_orders so the next schema drift is caught before consumers see broken data.

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