Struct RootMetadata 

pub struct RootMetadata {
    pub column_permutation: Vec<u8>,
    pub sorted_layout_signature: LayoutSignature,
    pub heat_distribution: HeatDist,
}

Metadata cached for one candidate root variable.

Fields

column_permutation: Vec<u8>

Column permutation needed to expose this root as the leading key.

sorted_layout_signature: LayoutSignature

Signature of the sorted layout used by this candidate root.

heat_distribution: HeatDist

Heavy-key heat distribution for this root.

Trait Implementations

impl Clone for RootMetadata

fn clone(&self) -> RootMetadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RootMetadata

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

Formats the value using the given formatter.

impl PartialEq for RootMetadata

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for RootMetadata