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MaxAggregator

laminar_core::operator::window

Struct MaxAggregator 

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pub struct MaxAggregator { /* private fields */ }
Expand description

Max aggregator - tracks maximum i64 value.

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impl MaxAggregator

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pub fn new(column_index: usize) -> Self

Creates a new max aggregator for the specified column.

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impl Aggregator for MaxAggregator

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type Acc = MaxAccumulator

The accumulator type used by this aggregator.
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fn create_accumulator(&self) -> MaxAccumulator

Creates a new empty accumulator.
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fn output_nullable(&self) -> bool

Returns whether the output is nullable (e.g., empty windows produce null). Read more
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fn extract(&self, event: &Event) -> Option<i64>

Extracts a value from an event to be aggregated. Read more
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fn output_data_type(&self) -> DataType

Returns the Arrow [DataType] for this aggregator’s output. Read more
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fn extract_batch( &self, event: &Event, ) -> SmallVec<[<Self::Acc as Accumulator>::Input; 4]>

Extracts all values from a multi-row batch event. Read more
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impl Clone for MaxAggregator

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fn clone(&self) -> MaxAggregator

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for MaxAggregator

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

Formats the value using the given formatter. Read more

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> ArchivePointee for T

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type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.
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fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.
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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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fn borrow_mut(&mut self) -> &mut T

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impl<T> CloneToUninit for T
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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
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn into(self) -> U

Calls U::from(self).

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

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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
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unsafe fn is_niched(niched: *const NichedOption<T, N1>) -> bool

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type Metadata = ()

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Create a new Policy that returns [Action::Follow] only if self and other return Action::Follow. Read more
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Create a new Policy that returns [Action::Follow] if either self or other returns Action::Follow. Read more
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fn vzip(self) -> V

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