Enum datafusion::physical_plan::ColumnarValue

pub enum ColumnarValue {
    Array(Arc<dyn Array + 'static>),
    Scalar(ScalarValue),
}

Represents the result of evaluating an expression: either a single ScalarValue or an [ArrayRef].

While a ColumnarValue can always be converted into an array for convenience, it is often much more performant to provide an optimized path for scalar values.

Variants

Array(Arc<dyn Array + 'static>)

Array of values

Scalar(ScalarValue)

A single value

Implementations

impl ColumnarValue

pub fn data_type(&self) -> DataType

pub fn into_array(self, num_rows: usize) -> Arc<dyn Array + 'static>

Convert a columnar value into an ArrayRef. Self::Scalar is converted by repeating the same scalar multiple times.

Trait Implementations

impl Clone for ColumnarValue

fn clone(&self) -> ColumnarValue

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ColumnarValue

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

Formats the value using the given formatter.

impl From<&RecordBatch> for ColumnarValue

fn from(batch: &RecordBatch) -> ColumnarValue

Converts to this type from the input type.