Aikesheng Open Source Community

Oct 29, 2025 · Databases

Why Does the Same SQL Run Faster on Oracle Than on OceanBase? Uncovering Execution Plan Discrepancies

A customer observed a SQL statement that runs twice as fast on Oracle as on OceanBase, prompting a detailed analysis of execution plans, leader distribution, and distributed query behavior, followed by practical hint and table‑group optimizations that reduce the runtime from several seconds to sub‑second levels.