Struct ColumnStatistics 

pub struct ColumnStatistics {
    pub min: SqlValue,
    pub max: SqlValue,
    pub null_count: u64,
    pub total_count: u64,
    pub distinct_count: Option<u64>,
}

カラム統計情報。

Fields

min: SqlValue

max: SqlValue

null_count: u64

total_count: u64

distinct_count: Option<u64>

Implementations

impl ColumnStatistics

pub fn compute(values: &[SqlValue]) -> Self

SqlValue スライスからカラム統計を計算する。

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() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ColumnStatistics

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ColumnStatistics

fn eq(&self, other: &ColumnStatistics) -> 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 Serialize for ColumnStatistics

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ColumnStatistics