Struct ColumnStatistics 

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

Statistics for a single column.

Fields

min: Option<ScalarValue>

Minimum value in the column (None if all values are null).

max: Option<ScalarValue>

Maximum value in the column (None if all values are null).

null_count: u64

Number of null values.

distinct_count: Option<u64>

Estimated number of distinct values (None if not computed).

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.

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 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.