Enum NullOrdering 

pub enum NullOrdering {
    First,
    Last,
}

NULL ordering specification.

Used to specify whether NULL values should appear first or last in the ordering.

Variants

First

NULLS FIRST - NULL values appear before non-NULL values

Last

NULLS LAST - NULL values appear after non-NULL values

Implementations

impl NullOrdering

pub fn as_str(&self) -> &'static str

Returns the SQL representation of this null ordering.

Trait Implementations

impl Clone for NullOrdering

fn clone(&self) -> NullOrdering

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NullOrdering

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

Formats the value using the given formatter.

impl Hash for NullOrdering

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for NullOrdering

fn eq(&self, other: &NullOrdering) -> 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 Copy for NullOrdering

impl Eq for NullOrdering

impl StructuralPartialEq for NullOrdering