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SQL-Migration-Dryrun-Guard: Why Regex-Based Static Analysis Fails to Prevent Production Database Lockups

This story is from 2026-10-14. It is preserved in the archive; the latest stories are on the live feed.

When performing zero-downtime database migrations on tables containing millions or tens of millions of rows, an unconsidered DDL statement can immediately lead to catastrophic exclusive locks ( ACCESS EXCLUSIVE in PostgreSQL), grinding the entire user-facing service to a halt. To tackle this proble…

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  1. 2026-10-14 01:05 · DEV Community — AI
    SQL-Migration-Dryrun-Guard: Why Regex-Based Static Analysis Fails to Prevent Production Database Lockups

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