Struct ColumnStatistics 

pub struct ColumnStatistics {
    pub null_count: u64,
    pub non_null_count: u64,
    pub min: Option<ScalarValue>,
    pub max: Option<ScalarValue>,
    /* private fields */
}

Fields

null_count: u64

non_null_count: u64

min: Option<ScalarValue>

max: Option<ScalarValue>

Implementations

impl ColumnStatistics

pub fn record_value(&mut self, value: &ScalarValue)

pub fn total_count(&self) -> u64

pub fn estimated_distinct_count(&self) -> Option<f64>

pub fn selectivity_for_op( &self, op: BinaryOp, literal: &ScalarValue, ) -> Option<f64>

Trait Implementations

impl Clone for ColumnStatistics

fn clone(&self) -> ColumnStatistics

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnStatistics

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

Formats the value using the given formatter.

impl Default for ColumnStatistics

fn default() -> ColumnStatistics

Returns the “default value” for a type.