Struct PhysicalExprDAEGBuilder 

struct PhysicalExprDAEGBuilder<'a, T, F: Fn(&ExprTreeNode<NodeIndex>) -> Result<T>> {
    graph: StableGraph<T, usize>,
    visited_plans: Vec<(Arc<dyn PhysicalExpr>, NodeIndex)>,
    constructor: &'a F,
}

This struct is used to convert a PhysicalExpr tree into a DAEG (i.e. an expression DAG) by collecting identical expressions in one node. Caller specifies the node type in the DAEG via the constructor argument, which constructs nodes in the DAEG from the ExprTreeNode ancillary object.

Fields

graph: StableGraph<T, usize>

visited_plans: Vec<(Arc<dyn PhysicalExpr>, NodeIndex)>

constructor: &'a F

Implementations

impl<T, F: Fn(&ExprTreeNode<NodeIndex>) -> Result<T>> PhysicalExprDAEGBuilder<'_, T, F>

fn mutate( &mut self, node: ExprTreeNode<NodeIndex>, ) -> Result<Transformed<ExprTreeNode<NodeIndex>>>