Enum AggregateStrategy 

pub enum AggregateStrategy {
    HashAggregate,
    SortAggregate,
    StreamingAggregate,
}

Aggregation policy type

Variants

HashAggregate

Hash Aggregation – Storing Group Status Using a HashMap Applicable to: cases where the number of group keys is high and there is sufficient memory available.

SortAggregate

Sorting and Aggregation: First sort the data, then perform the aggregation. Applicable to: inputs that are already sorted or nearly sorted, and in cases where memory is limited.

StreamingAggregate

Stream Aggregation – An optimized aggregation method when the input data is already sorted. Applicable to: The input data has already been sorted according to the grouping key.

Implementations

impl AggregateStrategy

pub fn name(&self) -> &'static str

Obtain the policy name

Trait Implementations

impl Clone for AggregateStrategy

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AggregateStrategy

impl Debug for AggregateStrategy

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

Formats the value using the given formatter.

impl Eq for AggregateStrategy

impl Hash for AggregateStrategy

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for AggregateStrategy

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for AggregateStrategy