SQL-ADVANCED5 MIN READ
Coach Through an EXPLAIN Estimate Mismatch
Coach a teammate to treat a row-estimate mismatch as a diagnosis problem before proposing a fix.
Ravi R Backend Engineer 01 Pause the reflex 02 Inspect the belief 03 Choose the next move The incident call marketplace search The plan estimate is off by orders of magnitude, and the room wants a fix before anyone explains the estimate. Classification matters more than speed-only heroics here. 500 vs 3.8M estimated rows versus likely actual rows 1 call must set the team debugging direction Symptom → belief → lever
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