Struct datafusion::physical_plan::expressions::AvgAccumulator

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pub struct AvgAccumulator { /* private fields */ }

Expand description

An accumulator to compute the average

Implementations

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impl AvgAccumulator

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pub fn try_new(datatype: &DataType) -> Result<AvgAccumulator, DataFusionError>

Creates a new AvgAccumulator

Trait Implementations

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impl Accumulator for AvgAccumulator

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fn state(&self) -> Result<Vec<ScalarValue, Global>, DataFusionError>

Returns the state of the accumulator at the end of the accumulation.

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fn update_batch(
&mut self,
values: &[Arc<dyn Array + 'static>]
) -> Result<(), DataFusionError>

updates the accumulator’s state from a vector of arrays.

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fn merge_batch(
&mut self,
states: &[Arc<dyn Array + 'static>]
) -> Result<(), DataFusionError>

updates the accumulator’s state from a vector of states.

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fn evaluate(&self) -> Result<ScalarValue, DataFusionError>

returns its value based on its current state.

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impl Debug for AvgAccumulator

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

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl RefUnwindSafe for AvgAccumulator

impl Send for AvgAccumulator

impl Sync for AvgAccumulator

impl Unpin for AvgAccumulator

impl UnwindSafe for AvgAccumulator

Blanket Implementations

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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,

const: unstable · source

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,

const: unstable · source

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

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · 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.

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impl<T> Same<T> for T

type Output = T

Should always be Self

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

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

fn vzip(self) -> V

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Struct datafusion::physical_plan::expressions::AvgAccumulator

Implementations

impl AvgAccumulator

pub fn try_new(datatype: &DataType) -> Result<AvgAccumulator, DataFusionError>

Trait Implementations

impl Accumulator for AvgAccumulator

fn state(&self) -> Result<Vec<ScalarValue, Global>, DataFusionError>

fn update_batch(
&mut self,
values: &[Arc<dyn Array + 'static>]
) -> Result<(), DataFusionError>

fn merge_batch(
&mut self,
states: &[Arc<dyn Array + 'static>]
) -> Result<(), DataFusionError>

fn evaluate(&self) -> Result<ScalarValue, DataFusionError>

impl Debug for AvgAccumulator

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

Auto Trait Implementations

impl RefUnwindSafe for AvgAccumulator

impl Send for AvgAccumulator

impl Sync for AvgAccumulator

impl Unpin for AvgAccumulator

impl UnwindSafe for AvgAccumulator

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> Same<T> for T

type Output = T

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

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

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

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

fn vzip(self) -> V

impl<T> Allocation for T where
T: RefUnwindSafe + Send + Sync,

Struct datafusion::physical_plan::expressions::AvgAccumulator

Implementations

impl AvgAccumulator

pub fn try_new(datatype: &DataType) -> Result<AvgAccumulator, DataFusionError>

Trait Implementations

impl Accumulator for AvgAccumulator

fn state(&self) -> Result<Vec<ScalarValue, Global>, DataFusionError>

fn update_batch( &mut self, values: &[Arc<dyn Array + 'static>]) -> Result<(), DataFusionError>

fn merge_batch( &mut self, states: &[Arc<dyn Array + 'static>]) -> Result<(), DataFusionError>

fn evaluate(&self) -> Result<ScalarValue, DataFusionError>

impl Debug for AvgAccumulator

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

Auto Trait Implementations

impl RefUnwindSafe for AvgAccumulator

impl Send for AvgAccumulator

impl Sync for AvgAccumulator

impl Unpin for AvgAccumulator

impl UnwindSafe for AvgAccumulator

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> Same<T> for T

type Output = T

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

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

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

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<V, T> VZip<V> for T where V: MultiLane<T>,

fn vzip(self) -> V

impl<T> Allocation for T where T: RefUnwindSafe + Send + Sync,

fn update_batch(
&mut self,
values: &[Arc<dyn Array + 'static>]
) -> Result<(), DataFusionError>

fn merge_batch(
&mut self,
states: &[Arc<dyn Array + 'static>]
) -> Result<(), DataFusionError>

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

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

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

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

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

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

impl<T> Allocation for T where
T: RefUnwindSafe + Send + Sync,