Struct BatchStats

pub struct BatchStats { /* private fields */ }

A collection of column stats with a known schema.

Implementations

impl BatchStats

pub fn new( schema: SchemaRef, stats: Vec<ColumnStats>, num_rows: Option<usize>, ) -> Self

Constructs a new BatchStats.

The stats should match the order of the schema.

pub fn schema(&self) -> &SchemaRef

Returns the Schema of the batch.

pub fn column_stats(&self) -> &[ColumnStats]

Returns the ColumnStats of all columns in the batch, if known.

pub fn get_stats(&self, column: &str) -> PolarsResult<&ColumnStats>

Returns the ColumnStats of a single column in the batch.

Returns an Err if no statistics are available for the given column.

pub fn num_rows(&self) -> Option<usize>

Returns the number of rows in the batch.

Returns None if the number of rows is unknown.

pub fn with_schema(&mut self, schema: SchemaRef)

pub fn take_indices(&mut self, indices: &[usize])

Trait Implementations

impl Clone for BatchStats

fn clone(&self) -> BatchStats

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for BatchStats

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

Formats the value using the given formatter.

impl Default for BatchStats

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for BatchStats

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for BatchStats

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

where __S: Serializer,

Serialize this value into the given Serde serializer.