Method map_one

src/expr/src/relation.rs:1192–1194

Append to each row a single `scalar`.

(self, scalar: MirScalarExpr)

    /// Append to each row a single `scalar`.
    pub fn map_one(self, scalar: MirScalarExpr) -> Self {
        self.map(vec![scalar])
    }

    /// Like `map`, but yields zero-or-more output rows per input row
    pub fn flat_map(self, func: TableFunc, exprs: Vec<MirScalarExpr>) -> Self {