Struct deltalake::datafusion::physical_expr::expressions::Literal
source · pub struct Literal { /* private fields */ }
Expand description
Represents a literal value
Implementations§
source§impl Literal
impl Literal
sourcepub fn new(value: ScalarValue) -> Literal
pub fn new(value: ScalarValue) -> Literal
Create a literal value expression
sourcepub fn value(&self) -> &ScalarValue
pub fn value(&self) -> &ScalarValue
Get the scalar value
Trait Implementations§
source§impl PartialEq<dyn Any> for Literal
impl PartialEq<dyn Any> for Literal
source§impl PartialEq for Literal
impl PartialEq for Literal
source§impl PhysicalExpr for Literal
impl PhysicalExpr for Literal
source§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Return a reference to Any that can be used for downcasting
source§fn data_type(&self, _input_schema: &Schema) -> Result<DataType, DataFusionError>
fn data_type(&self, _input_schema: &Schema) -> Result<DataType, DataFusionError>
Get the data type of this expression, given the schema of the input
source§fn nullable(&self, _input_schema: &Schema) -> Result<bool, DataFusionError>
fn nullable(&self, _input_schema: &Schema) -> Result<bool, DataFusionError>
Determine whether this expression is nullable, given the schema of the input
source§fn evaluate(
&self,
_batch: &RecordBatch
) -> Result<ColumnarValue, DataFusionError>
fn evaluate( &self, _batch: &RecordBatch ) -> Result<ColumnarValue, DataFusionError>
Evaluate an expression against a RecordBatch
source§fn children(&self) -> Vec<Arc<dyn PhysicalExpr>>
fn children(&self) -> Vec<Arc<dyn PhysicalExpr>>
Get a list of child PhysicalExpr that provide the input for this expr.
source§fn with_new_children(
self: Arc<Literal>,
_children: Vec<Arc<dyn PhysicalExpr>>
) -> Result<Arc<dyn PhysicalExpr>, DataFusionError>
fn with_new_children( self: Arc<Literal>, _children: Vec<Arc<dyn PhysicalExpr>> ) -> Result<Arc<dyn PhysicalExpr>, DataFusionError>
Returns a new PhysicalExpr where all children were replaced by new exprs.
source§fn get_ordering(&self, _children: &[SortProperties]) -> SortProperties
fn get_ordering(&self, _children: &[SortProperties]) -> SortProperties
The order information of a PhysicalExpr can be estimated from its children.
This is especially helpful for projection expressions. If we can ensure that the
order of a PhysicalExpr to project matches with the order of SortExec, we can
eliminate that SortExecs. Read more
source§fn evaluate_selection(
&self,
batch: &RecordBatch,
selection: &BooleanArray
) -> Result<ColumnarValue, DataFusionError>
fn evaluate_selection( &self, batch: &RecordBatch, selection: &BooleanArray ) -> Result<ColumnarValue, DataFusionError>
Evaluate an expression against a RecordBatch after first applying a
validity array
source§fn evaluate_bounds(
&self,
_children: &[&Interval]
) -> Result<Interval, DataFusionError>
fn evaluate_bounds( &self, _children: &[&Interval] ) -> Result<Interval, DataFusionError>
Computes the output interval for the expression, given the input
intervals. Read more
impl Eq for Literal
impl StructuralPartialEq for Literal
Auto Trait Implementations§
impl Freeze for Literal
impl !RefUnwindSafe for Literal
impl Send for Literal
impl Sync for Literal
impl Unpin for Literal
impl !UnwindSafe for Literal
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to
key
and return true
if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
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 moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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 moreCreates a shared type from an unshared type.