What do you do when the legacy warehouse you're migrating turns out to have been wrong the whole time? A report double-counting a full day of stock since the platform's cutover. A security rule quietly locking store managers out of their own numbers. A fix written into the code, then commented out as "not available yet", and left that way for years. This talk is about migrating a retail DWH nobody had fully audited in a long time, and pairing with an AI copilot to find, prove, and fix a backlog of quiet failures fast enough to hit a hard deadline.
