Enum OrderingProperty 

pub enum OrderingProperty {
    Unknown,
    AscendingNullsLast(Vec<usize>),
}

Physical ordering guaranteed by an operator.

This is a certificate produced by the physical plan, not a runtime guess from inspecting materialized rows. Merge consumers may use only the leading key prefix and NULL ordering they explicitly require.

Variants

Unknown

The operator makes no ordering guarantee.

AscendingNullsLast(Vec<usize>)

Rows are ascending on the listed key prefix, with NULL values last.

Implementations

impl OrderingProperty

pub fn ascending_nulls_last(key_indices: Vec<usize>) -> Self

Create an ascending, NULLS LAST ordering certificate.

pub fn proves_ascending_nulls_last(&self, required_keys: &[usize]) -> bool

Return whether this certificate proves the ordering required by merge.

pub fn remap_outer_projection(&self, columns: &[ColumnSource]) -> Self

Preserve this certificate through a fused JOIN projection.

Every certified outer key must remain in the projected row. Missing, reordered, or inner-sourced keys fail closed to Unknown.

Trait Implementations

impl Clone for OrderingProperty

fn clone(&self) -> OrderingProperty

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OrderingProperty

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

Formats the value using the given formatter.

impl Default for OrderingProperty

fn default() -> OrderingProperty

Returns the “default value” for a type.

impl Eq for OrderingProperty

impl PartialEq for OrderingProperty

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for OrderingProperty