Struct Estimate 

pub struct Estimate {
    pub elements: Option<usize>,
    pub distinct: Option<usize>,
    pub selectivity: Option<f64>,
    pub per_group: Option<Box<Self>>,
}

Fields

elements: Option<usize>

distinct: Option<usize>

selectivity: Option<f64>

per_group: Option<Box<Self>>

Implementations

impl Estimate

pub const UNKNOWN: Self

pub fn values(elements: usize, distinct: usize) -> Self

pub fn singleton() -> Self

pub fn with_unknown_distinct(self) -> Self

pub fn zero_or_one(self) -> Self

pub fn scaled(self, selectivity: f64) -> Self

Trait Implementations

impl Clone for Estimate

fn clone(&self) -> Estimate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Estimate

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

Formats the value using the given formatter.