Struct RankedFilter 

pub struct RankedFilter {
    pub filter: FilterExpr,
    pub selectivity: f64,
    pub cost: f64,
    pub score: f64,
    pub original_index: usize,
}

A filter with its ranking score

Fields

filter: FilterExpr

The filter expression

selectivity: f64

Estimated selectivity (0.0 - 1.0)

cost: f64

Estimated evaluation cost

score: f64

Ranking score (lower is better)

original_index: usize

Original position in input

Implementations

impl RankedFilter

pub fn new( filter: FilterExpr, selectivity: f64, cost: f64, original_index: usize, ) -> RankedFilter

Create new ranked filter

Trait Implementations

impl Clone for RankedFilter

fn clone(&self) -> RankedFilter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RankedFilter

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

Formats the value using the given formatter.

impl Ord for RankedFilter

fn cmp(&self, other: &RankedFilter) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for RankedFilter

fn eq(&self, other: &RankedFilter) -> 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 PartialOrd for RankedFilter

fn partial_cmp(&self, other: &RankedFilter) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for RankedFilter