Enum ValueIndexEntry 

pub enum ValueIndexEntry {
    Unbuilt,
    Absent,
    Present(Value),
}

A stored evaluated key distinguishes an unbuilt index, an absent row and a present SQL NULL. Consumers must not recompute an old expression against a newer routine definition.

Variants

Unbuilt

Absent

Present(Value)

Trait Implementations

impl Clone for ValueIndexEntry

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ValueIndexEntry

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

Formats the value using the given formatter.

impl Eq for ValueIndexEntry

impl PartialEq for ValueIndexEntry

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ValueIndexEntry