Enum ScanOrder 

pub enum ScanOrder {
    Storage,
    TimestampAscending,
    TimestampDescending,
    Attribute {
        column: ColumnId,
        direction: ScanDirection,
    },
}

Deterministic ordering used by Store::scan_documents.

Variants

Storage

Immutable segments in snapshot order and then the active segment, with ascending row numbers inside every source.

TimestampAscending

Ascending timestamp with ascending document id as the tie breaker.

TimestampDescending

Descending timestamp with ascending document id as the tie breaker.

Attribute

A declared U64, I64 or F64 user attribute in direction, with ascending document id as the tie breaker. F64 compares numerically and -0.0 equals +0.0. A row whose value is missing or NaN has no orderable value and sorts after every orderable row in both directions.

Fields

column: ColumnId

Declared user attribute that supplies the sort key.

direction: ScanDirection

Direction applied to orderable values.

Trait Implementations

impl Clone for ScanOrder

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ScanOrder

impl Debug for ScanOrder

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

Formats the value using the given formatter.

impl Default for ScanOrder

fn default() -> Self

Returns the “default value” for a type.

impl Eq for ScanOrder

impl PartialEq for ScanOrder

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ScanOrder