Struct datafusion_physical_expr::expressions::MaxAccumulator

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pub struct MaxAccumulator { /* private fields */ }

Expand description

An accumulator to compute the maximum value

Implementations

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impl MaxAccumulator

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pub fn try_new(datatype: &DataType) -> Result<Self>

new max accumulator

Trait Implementations

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impl Accumulator for MaxAccumulator

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

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

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fn merge_batch(&mut self, states: &[ArrayRef]) -> Result<()>

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

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fn state(&self) -> Result<Vec<AggregateState>>

Returns the state of the accumulator at the end of the accumulation. in the case of an average on which we track sum and n, this function should return a vector of two values, sum and n. Read more

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

returns its value based on its current state.

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impl Debug for MaxAccumulator

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

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl RefUnwindSafe for MaxAccumulator

impl Send for MaxAccumulator

impl Sync for MaxAccumulator

impl Unpin for MaxAccumulator

impl UnwindSafe for MaxAccumulator

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_expr::expressions::MaxAccumulator

Implementations

impl MaxAccumulator

pub fn try_new(datatype: &DataType) -> Result<Self>

Trait Implementations

impl Accumulator for MaxAccumulator

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

fn merge_batch(&mut self, states: &[ArrayRef]) -> Result<()>

fn state(&self) -> Result<Vec<AggregateState>>

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

impl Debug for MaxAccumulator

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

Auto Trait Implementations

impl RefUnwindSafe for MaxAccumulator

impl Send for MaxAccumulator

impl Sync for MaxAccumulator

impl Unpin for MaxAccumulator

impl UnwindSafe for MaxAccumulator

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_expr::expressions::MaxAccumulator

Implementations

impl MaxAccumulator

pub fn try_new(datatype: &DataType) -> Result<Self>

Trait Implementations

impl Accumulator for MaxAccumulator

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

fn merge_batch(&mut self, states: &[ArrayRef]) -> Result<()>

fn state(&self) -> Result<Vec<AggregateState>>

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

impl Debug for MaxAccumulator

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

Auto Trait Implementations

impl RefUnwindSafe for MaxAccumulator

impl Send for MaxAccumulator

impl Sync for MaxAccumulator

impl Unpin for MaxAccumulator

impl UnwindSafe for MaxAccumulator

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,

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,