Struct ProjectItem 

pub struct ProjectItem {
    pub expr: ExprId,
    pub alias: Option<String>,
    pub out_var: Option<VarId>,
}

A single item in a PROJECT or WITH operator: an expression plus an optional alias.

Fields

expr: ExprId

The expression to project.

alias: Option<String>

Optional output column name.

out_var: Option<VarId>

For a WITH item only: the variable this item introduces into the downstream scope (#814). The lowerer maps it to the projected column so a later clause referencing the alias resolves. None for terminal RETURN items, which introduce no scope.

Trait Implementations

impl Clone for ProjectItem

fn clone(&self) -> ProjectItem

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ProjectItem

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ProjectItem

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ProjectItem

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ProjectItem

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ProjectItem