Struct datafusion_physical_expr::expressions::GetIndexedFieldExpr

pub struct GetIndexedFieldExpr { /* private fields */ }

expression to get a field of a struct array.

Implementations

impl GetIndexedFieldExpr

pub fn new(arg: Arc<dyn PhysicalExpr>, key: ScalarValue) -> Self

Create new get field expression

pub fn key(&self) -> &ScalarValue

Get the input key

pub fn arg(&self) -> &Arc<dyn PhysicalExpr>

Get the input expression

Trait Implementations

impl Debug for GetIndexedFieldExpr

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

Formats the value using the given formatter.

impl Display for GetIndexedFieldExpr

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

Formats the value using the given formatter.

impl PhysicalExpr for GetIndexedFieldExpr

fn as_any(&self) -> &dyn Any

Returns the physical expression as Any so that it can be downcast to a specific implementation.

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

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

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