Enum DistinctKey 

pub enum DistinctKey {
    Null,
    Bool(bool),
    Int(i64),
    Real(u64),
    Text(String),
    Vector(Vec<u8>),
}

A hashable typed wrapper around Value, used as the GROUP BY key element and as the COUNT(DISTINCT col) set entry. We can’t impl Hash for Value because Value has a Real(f64) variant and f64 isn’t Hash + Eq. Round-trip via f64::to_bits to keep the canonical bit-pattern as the key — NaN keys remain distinguishable by exact bit pattern, which is the safer choice for grouping (we don’t try to be cute about NaN==NaN).

Variants

Null

Bool(bool)

Int(i64)

Real(u64)

Text(String)

Vector(Vec<u8>)

Implementations

impl DistinctKey

pub fn from_value(v: &Value) -> Self

Trait Implementations

impl Clone for DistinctKey

fn clone(&self) -> DistinctKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DistinctKey

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

Formats the value using the given formatter.

impl Hash for DistinctKey

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 DistinctKey

fn eq(&self, other: &DistinctKey) -> 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 Eq for DistinctKey

impl StructuralPartialEq for DistinctKey