Method map

src/expr/src/relation.rs:1177–1189

Append to each row the results of applying elements of `scalar`.

(mut self, scalars: Vec<MirScalarExpr>)

    /// Append to each row the results of applying elements of `scalar`.
    pub fn map(mut self, scalars: Vec<MirScalarExpr>) -> Self {
        if let MirRelationExpr::Map { scalars: s, .. } = &mut self {
            s.extend(scalars);
            self
        } else if !scalars.is_empty() {
            MirRelationExpr::Map {
                input: Box::new(self),
                scalars,
            }
        } else {
            self
        }
    }

    /// Append to each row a single `scalar`.
    pub fn map_one(self, scalar: MirScalarExpr) -> Self {