Struct datafusion_physical_expr::expressions::Literal

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pub struct Literal { /* private fields */ }

Expand description

Represents a literal value

Implementations

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impl Literal

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pub fn new(value: ScalarValue) -> Self

Create a literal value expression

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pub fn value(&self) -> &ScalarValue

Get the scalar value

Trait Implementations

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impl Debug for Literal

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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 Display for Literal

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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 PhysicalExpr for Literal

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fn as_any(&self) -> &dyn Any

Return a reference to Any that can be used for downcasting

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fn data_type(&self, _input_schema: &Schema) -> Result<DataType>

Get the data type of this expression, given the schema of the input

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fn nullable(&self, _input_schema: &Schema) -> Result<bool>

Determine whether this expression is nullable, given the schema of the input

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fn evaluate(&self, _batch: &RecordBatch) -> Result<ColumnarValue>

Evaluate an expression against a RecordBatch

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fn evaluate_selection(
 &self,
 batch: &RecordBatch,
 selection: &BooleanArray
) -> Result<ColumnarValue>

Evaluate an expression against a RecordBatch after first applying a validity array Read more

Auto Trait Implementations

impl RefUnwindSafe for Literal

impl Send for Literal

impl Sync for Literal

impl Unpin for Literal

impl UnwindSafe for Literal

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> ToString for T where
T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more

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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::Literal

Implementations

impl Literal

pub fn new(value: ScalarValue) -> Self

pub fn value(&self) -> &ScalarValue

Trait Implementations

impl Debug for Literal

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

impl Display for Literal

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

impl PhysicalExpr for Literal

fn as_any(&self) -> &dyn Any

fn data_type(&self, _input_schema: &Schema) -> Result<DataType>

fn nullable(&self, _input_schema: &Schema) -> Result<bool>

fn evaluate(&self, _batch: &RecordBatch) -> Result<ColumnarValue>

fn evaluate_selection( &self, batch: &RecordBatch, selection: &BooleanArray) -> Result<ColumnarValue>

Auto Trait Implementations

impl RefUnwindSafe for Literal

impl Send for Literal

impl Sync for Literal

impl Unpin for Literal

impl UnwindSafe for Literal

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> ToString for T where T: Display + ?Sized,

default fn to_string(&self) -> String

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 evaluate_selection(
&self,
batch: &RecordBatch,
selection: &BooleanArray
) -> Result<ColumnarValue>

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> ToString for T where
T: Display + ?Sized,

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,