Struct HistogramBucket 

pub struct HistogramBucket {
    pub lower_bound: f64,
    pub upper_bound: f64,
    pub frequency: u64,
    pub distinct_count: u64,
}

A bucket in an equi-depth histogram.

Each bucket represents a range of values and the frequency of rows falling within that range. In an equi-depth histogram, all buckets contain approximately the same number of rows.

Fields

lower_bound: f64

Lower bound of the bucket (inclusive).

upper_bound: f64

Upper bound of the bucket (exclusive, except for the last bucket).

frequency: u64

Number of rows in this bucket.

distinct_count: u64

Number of distinct values in this bucket.

Implementations

impl HistogramBucket

pub fn new( lower_bound: f64, upper_bound: f64, frequency: u64, distinct_count: u64, ) -> Self

Creates a new histogram bucket.

pub fn width(&self) -> f64

Returns the width of this bucket.

pub fn contains(&self, value: f64) -> bool

Checks if a value falls within this bucket.

pub fn overlap_fraction(&self, lower: Option<f64>, upper: Option<f64>) -> f64

Returns the fraction of this bucket covered by the given range.

Trait Implementations

impl Clone for HistogramBucket

fn clone(&self) -> HistogramBucket

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HistogramBucket

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

Formats the value using the given formatter.