Struct datafusion::physical_plan::expressions::CastExpr

pub struct CastExpr { /* private fields */ }

CAST expression casts an expression to a specific data type and returns a runtime error on invalid cast

Implementations

impl CastExpr

pub fn new(
    expr: Arc<dyn PhysicalExpr + 'static>,
    cast_type: DataType,
    cast_options: CastOptions
) -> CastExpr

Create a new CastExpr

pub fn expr(&self) -> &Arc<dyn PhysicalExpr + 'static>

The expression to cast

pub fn cast_type(&self) -> &DataType

The data type to cast to

Trait Implementations

impl Debug for CastExpr

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

Formats the value using the given formatter.

impl Display for CastExpr

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

Formats the value using the given formatter.

impl PhysicalExpr for CastExpr

fn as_any(&self) -> &(dyn Any + 'static)

Return a reference to Any that can be used for downcasting

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

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

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

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

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

Evaluate an expression against a RecordBatch

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

Evaluate an expression against a RecordBatch after first applying a validity array