Enum ScanProjection 

pub enum ScanProjection {
    Column(Projection),
    Computed {
        expr: ScalarExpr<u32>,
        alias: String,
    },
}

A column or computed expression to include in scan results.

Variants

Column(Projection)

Computed

Fields

expr: ScalarExpr<u32>

alias: String

Implementations

impl ScanProjection

pub fn column<P>(proj: P) -> ScanProjection

where P: Into<Projection>,

pub fn computed<S>(expr: ScalarExpr<u32>, alias: S) -> ScanProjection

where S: Into<String>,

Trait Implementations

impl Clone for ScanProjection

fn clone(&self) -> ScanProjection

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ScanProjection

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

Formats the value using the given formatter.

impl From<&Projection> for ScanProjection

fn from(value: &Projection) -> ScanProjection

Converts to this type from the input type.

impl From<&ScanProjection> for ScanProjection

fn from(value: &ScanProjection) -> ScanProjection

Converts to this type from the input type.

impl From<Projection> for ScanProjection

fn from(value: Projection) -> ScanProjection

Converts to this type from the input type.