Tomaž Kaštrun 12/16/2025

Advent of 2025, Day 16 – SQL Server 2025 – Optional parameter plan optimization (OPPO)

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This technical article details the Optional Parameter Plan Optimization (OPPO) feature in Microsoft SQL Server 2025. OPPO addresses a specific Parameter Sensitive Plan (PSP) problem, particularly for queries using patterns like 'WHERE column = @param OR @param IS NULL'. It explains how OPPO, enabled by default, helps avoid inefficient table scans and excessive memory grants by enabling adaptive plan optimization for dynamic search conditions.

Advent of 2025, Day 16 – SQL Server 2025 – Optional parameter plan optimization (OPPO)

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