PhysicalPlan(query: Query, leaf: Edge)
Directly construct a PhysicalPlan for the given leaf.
query - We always need a reference to a query.
leaf - The Edge which will be the leaf of this LogicalPlan.
PhysicalPlan(query: Query, operator: Int = PhysicalOperator.LEAF)
Representation of the physical plan.
This class extends AbstractMultiTree and and has physical operators instread of logical operators in comparison to the LogicalPlan class.