Module visitor 

Traits

ExecutionPlanVisitor

Trait that implements the Visitor pattern for a depth first walk of ExecutionPlan nodes. pre_visit is called before any children are visited, and then post_visit is called after all children have been visited.

Functions

accept

Visit all children of this plan, according to the order defined on ExecutionPlanVisitor.

visit_execution_plan

Recursively calls pre_visit and post_visit for this node and all of its children, as described on ExecutionPlanVisitor