Method unary

src/sql/src/func.rs:273–278

Builds an operation that takes one argument.

(f: F)

    /// Builds an operation that takes one argument.
    fn unary<F>(f: F) -> Operation<R>
    where
        F: Fn(&ExprContext, HirScalarExpr) -> Result<R, PlanError> + Send + Sync + 'static,
    {
        Self::variadic(move |ecx, exprs| f(ecx, exprs.into_element()))
    }

    /// Builds an operation that takes one argument and an order_by.
    fn unary_ordered<F>(f: F) -> Operation<R>