Struct datafusion::physical_plan::expressions::Column

pub struct Column { /* fields omitted */ }

Represents the column at a given index in a RecordBatch

Implementations

impl Column

pub fn new(name: &str) -> Self

Create a new column expression

pub fn name(&self) -> &str

Get the column name

Trait Implementations

impl Debug for Column

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

Formats the value using the given formatter.

impl Display for Column

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

Formats the value using the given formatter.

impl PhysicalExpr for Column

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>

Decide whehter this expression is nullable, given the schema of the input

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

Evaluate the expression