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Comments on No. 75 of 155 · Database Architects (Neumann, Leis) · edition of Wednesday 28 October 2026

The Benchmarking Crisis

Summary

AI-driven code generation is making database benchmarks like ClickBench easy to overfit, since tools can tune engines query by query, exploiting workload quirks such as hash-only string grouping, predicate caching, and clustered-data shortcuts that wouldn't matter in real use.

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