Struct datafusion::physical_plan::expressions::Literal

pub struct Literal { /* fields omitted */ }

Represents a literal value

Implementations

impl Literal

pub fn new(value: ScalarValue) -> Self

Create a literal value expression

pub fn value(&self) -> &ScalarValue

Get the scalar value

Trait Implementations

impl Debug for Literal

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

Formats the value using the given formatter.

impl Display for Literal

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

Formats the value using the given formatter.

impl PhysicalExpr for Literal

fn as_any(&self) -> &dyn Any

Return a reference to Any that can be used for downcasting

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

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

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

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

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

Evaluate an expression against a RecordBatch