Hi Renjie, RelTraitDef is the definition or template of RelTrait, while the RelTrait concept corresponds to the concept of 'physical property' in *The Volcano Optimizer Generator: Extensibility and Efficient Search*, by G Graefe.
Regards, Ted Xu On Wed, Aug 9, 2017 at 5:02 PM Renjie Liu <[email protected]> wrote: > Hi, all: > I'm reading calcite's source code and confused with these two classes. Why > these two classes exists and what's their role in query optimizer process? > -- > Liu, Renjie > Software Engineer, MVAD >
