Struct datafusion::physical_plan::expressions::Literal
source · [−]pub struct Literal { /* private fields */ }
Expand description
Represents a literal value
Implementations
sourceimpl 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
sourceimpl PhysicalExpr for Literal
impl PhysicalExpr for Literal
sourcefn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Return a reference to Any that can be used for downcasting
sourcefn 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
sourcefn 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
sourcefn evaluate(
&self,
_batch: &RecordBatch
) -> Result<ColumnarValue, DataFusionError>
fn evaluate(
&self,
_batch: &RecordBatch
) -> Result<ColumnarValue, DataFusionError>
Evaluate an expression against a RecordBatch
sourcefn 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 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
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more