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 PartialEq<Literal> for Literal

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fn eq(&self, other: &Literal) -> bool

This method tests for self and other values to be equal, and is used by ==. Read more

1.0.0 · source

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more

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impl PartialEq<dyn Any + 'static> for Literal

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fn eq(&self, other: &dyn Any) -> bool

This method tests for self and other values to be equal, and is used by ==. Read more

1.0.0 · source

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. 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 expr_stats(&self) -> Arc<dyn PhysicalExprStats>

Return the expression statistics for this expression. This API is currently experimental.

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fn children(&self) -> Vec<Arc<dyn PhysicalExpr>>ⓘNotable traits for Vec<u8, A>`impl<A> Write for Vec<u8, A>where A: Allocator,`

Get a list of child PhysicalExpr that provide the input for this expr.

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fn with_new_children(
self: Arc<Self>,
_children: Vec<Arc<dyn PhysicalExpr>>
) -> Result<Arc<dyn PhysicalExpr>>

Returns a new PhysicalExpr where all children were replaced by new exprs.

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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

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impl Eq for Literal

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impl StructuralEq for Literal

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impl StructuralPartialEq for Literal

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 Twhere
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 Twhere
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 Twhere
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<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.

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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 Twhere
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 Twhere
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 Twhere
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 Twhere
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 Twhere
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 PartialEq<Literal> for Literal

fn eq(&self, other: &Literal) -> bool

fn ne(&self, other: &Rhs) -> bool

impl PartialEq<dyn Any + 'static> for Literal

fn eq(&self, other: &dyn Any) -> bool

fn ne(&self, other: &Rhs) -> bool

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 expr_stats(&self) -> Arc<dyn PhysicalExprStats>

fn children(&self) -> Vec<Arc<dyn PhysicalExpr>>ⓘNotable traits for Vec<u8, A>impl<A> Write for Vec<u8, A>where A: Allocator,

fn with_new_children( self: Arc<Self>, _children: Vec<Arc<dyn PhysicalExpr>>) -> Result<Arc<dyn PhysicalExpr>>

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

impl Eq for Literal

impl StructuralEq for Literal

impl StructuralPartialEq for Literal

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 Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> Same<T> for T

type Output = T

impl<T> ToString for Twhere T: Display + ?Sized,

default fn to_string(&self) -> String

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

type Error = Infallible

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

impl<T, U> TryInto<U> for Twhere 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 Twhere V: MultiLane<T>,

fn vzip(self) -> V

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

fn children(&self) -> Vec<Arc<dyn PhysicalExpr>>ⓘNotable traits for Vec<u8, A>`impl<A> Write for Vec<u8, A>where A: Allocator,`

fn with_new_children(
self: Arc<Self>,
_children: Vec<Arc<dyn PhysicalExpr>>
) -> Result<Arc<dyn PhysicalExpr>>

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

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

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

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

impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,

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

impl<T> ToString for Twhere
T: Display + ?Sized,

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

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

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

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