Leveraging Re-costing for Online Optimization of Parameterized Queries with Guarantees
Summary: Plan recosting for online PQO to bound per-instance sub-optimality with low overhead and a compact plan cache. Empirically validated on industry benchmarks and real workloads with a modified MS SQL Server optimizer, beating prior online PQO. (summarized by gpt-5-nano on Feb 09 2026)
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