Java Tech Enthusiast

Sep 13, 2026 · Databases

MySQL 9.0 GA: JSON Multi-Valued Indexes, Parallel Query V2, and AI Optimizer Deep Dive

MySQL 9.0 introduces three major features: native JSON multi-valued indexes delivering 370x faster array queries, Parallel Query V2 with work-stealing achieving 7-8x speedups on analytical workloads, and an ML-based AI query optimizer that cuts index misselection from 12% to 2% and boosts complex query performance by 25-40%.