Enum SelectItem 

pub enum SelectItem {
    Column(ColumnMarker),
    Computed {
        expr: Expr,
        alias: String,
    },
}

A select list item that can be either a simple column or a computed expression.

Variants

Column(ColumnMarker)

A simple column reference.

Computed

A computed expression with an alias.

Fields

expr: Expr

The expression to compute.

alias: String

The alias for the computed expression.

Implementations

impl SelectItem

pub fn column(marker: ColumnMarker) -> Self

Creates a SelectItem from a ColumnMarker.

pub fn computed(expr: Expr, alias: impl Into<String>) -> Self

Creates a computed SelectItem with an expression and alias.

Trait Implementations

impl Clone for SelectItem

fn clone(&self) -> SelectItem

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SelectItem

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

Formats the value using the given formatter.

impl From<ColumnMarker> for SelectItem

fn from(marker: ColumnMarker) -> Self

Converts to this type from the input type.

impl PartialEq for SelectItem

fn eq(&self, other: &SelectItem) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for SelectItem