Enum query_structure::filter::ScalarProjection

pub enum ScalarProjection {
    Single(ScalarFieldRef),
    Compound(Vec<ScalarFieldRef>),
}

Variants

Single(ScalarFieldRef)

A single field projection.

Compound(Vec<ScalarFieldRef>)

A tuple projection, e.g. if (a, b) ((1, 2), (1, 3), …) is supposed to be queried.

Implementations

impl ScalarProjection

pub fn scalar_fields(&self) -> Vec<&ScalarFieldRef>

pub fn as_single(&self) -> Option<&ScalarFieldRef>

Trait Implementations

impl Clone for ScalarProjection

fn clone(&self) -> ScalarProjection

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ScalarProjection

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

Formats the value using the given formatter.

impl Hash for ScalarProjection

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 ScalarProjection

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Eq for ScalarProjection

impl StructuralEq for ScalarProjection

impl StructuralPartialEq for ScalarProjection