Enum ProjectionKind 

pub enum ProjectionKind {
    Column {
        qualifier: Option<String>,
        name: String,
    },
    Aggregate(AggregateCall),
}

What an individual projection item produces.

Variants

Column

Column reference. qualifier is Some for t.col shapes (SQLR-5 — needed so JOIN execution can disambiguate same-named columns across tables); None for bare col. The single-table path ignores the qualifier and looks up the name directly, preserving legacy behavior.

Fields

qualifier: Option<String>

name: String

Aggregate(AggregateCall)

Aggregate function call: COUNT(*), SUM(col), etc.

Trait Implementations

impl Clone for ProjectionKind

fn clone(&self) -> ProjectionKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ProjectionKind

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

Formats the value using the given formatter.