Struct datafusion::physical_plan::functions::ScalarFunctionExpr

pub struct ScalarFunctionExpr { /* fields omitted */ }

Physical expression of a scalar function

Implementations

impl ScalarFunctionExpr

pub fn new(
    name: &str,
    fun: ScalarFunctionImplementation,
    args: Vec<Arc<dyn PhysicalExpr>>,
    return_type: &DataType
) -> Self

Create a new Scalar function

Trait Implementations

impl Debug for ScalarFunctionExpr

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

Formats the value using the given formatter.

impl Display for ScalarFunctionExpr

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

Formats the value using the given formatter.

impl PhysicalExpr for ScalarFunctionExpr

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<ArrayRef>

Evaluate an expression against a RecordBatch