MySQL :: MySQL 5.1 Reference Manual :: 7.2.6 Index Merge Optimization
7.2.6.1. The Index Merge Intersection Access Algorithm 7.2.6.2. The Index Merge Union Access Algorithm 7.2.6.3. The Index Merge Sort-Union Access Algorithm
MySQL :: MySQL 5.1 Reference Manual :: 7.2.6 Index Merge Optimization
7.2.6.1. The Index Merge Intersection Access Algorithm 7.2.6.2. The Index Merge Union Access Algorithm 7.2.6.3. The Index Merge Sort-Union Access Algorithm
