DecimalAvgAccumulator

datafusion_functions_aggregate::average

Struct DecimalAvgAccumulator 

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struct DecimalAvgAccumulator<T: DecimalType + ArrowNumericType + Debug> {
    sum: Option<T::Native>,
    count: u64,
    sum_scale: i8,
    sum_precision: u8,
    target_precision: u8,
    target_scale: i8,
}
Expand description

An accumulator to compute the average for decimals

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§sum: Option<T::Native>§count: u64§sum_scale: i8§sum_precision: u8§target_precision: u8§target_scale: i8

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impl<T: DecimalType + ArrowNumericType + Debug> Accumulator for DecimalAvgAccumulator<T>

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fn update_batch(&mut self, values: &[ArrayRef]) -> Result<()>

Updates the accumulator’s state from its input. Read more
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fn evaluate(&mut self) -> Result<ScalarValue>

Returns the final aggregate value, consuming the internal state. Read more
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fn size(&self) -> usize

Returns the allocated size required for this accumulator, in bytes, including Self. Read more
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fn state(&mut self) -> Result<Vec<ScalarValue>>

Returns the intermediate state of the accumulator, consuming the intermediate state. Read more
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fn merge_batch(&mut self, states: &[ArrayRef]) -> Result<()>

Updates the accumulator’s state from an Array containing one or more intermediate values. Read more
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fn retract_batch(&mut self, values: &[ArrayRef]) -> Result<()>

Retracts (removed) an update (caused by the given inputs) to accumulator’s state. Read more
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fn supports_retract_batch(&self) -> bool

Does the accumulator support incrementally updating its value by removing values. Read more
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impl<T: Debug + DecimalType + ArrowNumericType + Debug> Debug for DecimalAvgAccumulator<T>
where T::Native: Debug,

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<T> Freeze for DecimalAvgAccumulator<T>
where <T as ArrowPrimitiveType>::Native: Freeze,

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impl<T> RefUnwindSafe for DecimalAvgAccumulator<T>
where <T as ArrowPrimitiveType>::Native: RefUnwindSafe,

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impl<T> Send for DecimalAvgAccumulator<T>

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impl<T> Sync for DecimalAvgAccumulator<T>

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impl<T> Unpin for DecimalAvgAccumulator<T>
where <T as ArrowPrimitiveType>::Native: Unpin,

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impl<T> UnwindSafe for DecimalAvgAccumulator<T>
where <T as ArrowPrimitiveType>::Native: UnwindSafe,

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

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. 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 in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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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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impl<T> IntoEither for T

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

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fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns [Action::Follow] only if self and other return Action::Follow. Read more
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fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns [Action::Follow] if either self or other returns Action::Follow. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

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impl<T> ErasedDestructor for T
where T: 'static,