Struct StatsCollector

Source

pub struct StatsCollector { /* private fields */ }

Expand description

Collects statistics (count, sum, min, max) for a column.

Implementations§

Source §

impl StatsCollector

Source

pub fn new(column_idx: usize) -> Self

Creates a collector that computes statistics for the given column.

Trait Implementations§

Source §

impl Clone for StatsCollector

Source §

fn clone(&self) -> StatsCollector

Returns a duplicate of the value. Read more

1.0.0 · Source§

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

Performs copy-assignment from source. Read more

Source §

impl Collector for StatsCollector

Source §

type Fruit = CollectorStats

Final result type after merging all partitions.

Source §

type PartitionCollector = StatsPartitionCollector

Partition-local collector type.

Source §

fn for_partition(&self, _partition_id: usize) -> Self::PartitionCollector

Creates a collector for a single partition (called per-thread).

Source §

fn merge(&self, fruits: Vec<CollectorStats>) -> CollectorStats

Merges results from all partitions (called once at the end).

Source §

impl Debug for StatsCollector

Source §

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

§

impl UnwindSafe for StatsCollector

Blanket Implementations§

Source §

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

Source §

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

Source §

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

Source §

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

Source §

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

Source §

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

Mutably borrows from an owned value. Read more

Source §

impl<T> CloneToUninit for T
where T: Clone,

Source §

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

Source §

impl<T> From<T> for T

Source §

fn from(t: T) -> T

Returns the argument unchanged.

Source §

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

Source §

fn into(self) -> U

Calls U::from(self).

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

Source §

impl<T> IntoEither for T

Source §

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

Source §

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

Source §