Struct polars_io :: predicates :: BatchStats Copy item path

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.

Trait Implementations§

impl Debug for BatchStats

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

Formats the value using the given formatter. Read more

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. Read more

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. Read more

Auto Trait Implementations§

impl !UnwindSafe for BatchStats

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more