Struct InputRefExpression 

pub struct InputRefExpression {
    return_type: DataType,
    idx: usize,
}

A reference to a column in input relation.

Fields

return_type: DataType

idx: usize

Implementations

impl InputRefExpression

pub fn new(return_type: DataType, idx: usize) -> Self

pub fn from_prost(prost: &ExprNode) -> Self

Create an InputRefExpression from a protobuf expression.

Panics if the protobuf expression is not an input reference.

pub fn index(&self) -> usize

pub fn eval_immut(&self, input: &DataChunk) -> Result<ArrayRef>

Trait Implementations

impl Build for InputRefExpression

fn build( prost: &ExprNode, _build_child: impl Fn(&ExprNode) -> Result<BoxedExpression>, ) -> Result<Self>

Build the expression Self from protobuf.

impl Clone for InputRefExpression

fn clone(&self) -> InputRefExpression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for InputRefExpression

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

Formats the value using the given formatter.

impl Expression for InputRefExpression

fn return_type(&self) -> DataType

Get the return data type.

fn eval<'life0, 'life1, 'async_trait>( &'life0 self, input: &'life1 DataChunk, ) -> Pin<Box<dyn Future<Output = Result<ArrayRef>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Evaluate the expression in vectorized execution. Returns an array.

fn eval_row<'life0, 'life1, 'async_trait>( &'life0 self, input: &'life1 OwnedRow, ) -> Pin<Box<dyn Future<Output = Result<Datum>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Evaluate the expression in row-based execution. Returns a nullable scalar.

fn input_ref_index(&self) -> Option<usize>

Get the index if the expression is an InputRef.

fn eval_v2<'life0, 'life1, 'async_trait>( &'life0 self, input: &'life1 DataChunk, ) -> Pin<Box<dyn Future<Output = Result<ValueImpl>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Evaluate the expression in vectorized execution. Returns a value that can be either an array, or a scalar if all values in the array are the same.

fn eval_const(&self) -> Result<Datum>

Evaluate if the expression is constant.