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Cost Estimates or Timed Canaries: A Debate for Promoting Agent SQL

This story is from 2026-09-21. It is preserved in the archive; the latest stories are on the live feed.

On a Tuesday release window, an analytics agent proposed a four-join reporting query against a 40 million row events table. The planner estimated a few thousand cost units because the most selective predicate still used last week's statistics. Staging accepted the plan, then the first canary scanne…

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  1. 2026-09-21 13:11 · DEV Community — AI
    Cost Estimates or Timed Canaries: A Debate for Promoting Agent SQL

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