Struct JoinPattern 

pub struct JoinPattern {
    pub estimated_size: usize,
    pub bound_vars: Vec<String>,
    pub free_vars: Vec<String>,
    pub label: String,
}

A single triple pattern annotated with cost-estimation metadata.

Fields

estimated_size: usize

Estimated number of result rows produced by this pattern.

bound_vars: Vec<String>

Variables that are already bound when this pattern is reached.

free_vars: Vec<String>

Variables that this pattern will bind (free before evaluation).

label: String

Human-readable identifier (e.g. triple pattern string).

Implementations

impl JoinPattern

pub fn new( label: impl Into<String>, estimated_size: usize, bound_vars: Vec<String>, free_vars: Vec<String>, ) -> Self

Convenience constructor.

Trait Implementations

impl Clone for JoinPattern

fn clone(&self) -> JoinPattern

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for JoinPattern

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for JoinPattern

fn eq(&self, other: &JoinPattern) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for JoinPattern