The Volcano Query Optimization Framework. S. Sudarshan (based on description in Prasan Roy’s thesis Chapter 2). Transformation Rules. Commutativity. Associativity. Selection Push Down. Enumeration of Equivalent Expressions.
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The Volcano Query Optimization Framework
(based on description in Prasan Roy’s thesis Chapter 2)
Selection Push Down
1. Logical plan space generation
2. Physical plan space generation
3. Search for best plan
How to do
Physical Query DAG for A joinA.X=B.Y B
FindBestPlan (LogExpr, PhysProp, Limit)