Scry – Test migrations against production scale copy of your DB

What it does

Staging passes. CI is green. A teammate adds a region column to the orders table, backfills 25,000 rows, and opens a PR. Everything looks clean. The migration introduces a 92x query regression that nobody will catch until production. Picture a typical e-commerce app. The orders table has ~25,000 rows, a handful of indexes, and a steady workload of filters and joins. A teammate adds a region column for a new geo-filtering feature: -- Add the region column ALTER TABLE orders ADD COLUMN region VARCHAR(50); -- Backfill existing orders with region data UPDATE orders SET region = CASE WHEN (id % 5) = 0 THEN 'west' WHEN (id % 5) = 1 THEN 'east' WHEN (id % 5) = 2 THEN 'central' WHEN (id % 5) = 3…from scrydata.com

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