PostgreSQL Plan Signatures: Quick Reference

PostgreSQL Plan Signatures: Quick Reference A scannable lookup companion to the Complete Guide to PostgreSQL SQL Query Analysis & Optimization series. Designed for when you have an EXPLAIN plan in front of you and need the pattern → fix mapping fast, without re-reading the deep-dive articles. Three tables below: Plan-node signatures — "when you see this, do that." SQL anti-patterns — "if your code looks like this, replace with that." MyDBA analyzer rules — severity, trigger condition, and th