AntTech

May 29, 2019 · Databases

OceanBase Query Optimizer: Challenges, Techniques, and Engineering Practices

This article examines the core challenges of query optimization in relational databases—accurate statistics, massive plan spaces, and efficient plan management—and explains how OceanBase addresses them through logical/physical row concepts, real‑time statistics, distributed two‑stage planning, adaptive caching, and plan evolution mechanisms.