Function avg

datafusion/expr/src/test/function_stub.rs:83–92

(expr: Expr)

create_func!(Avg, avg_udaf);

pub fn avg(expr: Expr) -> Expr {
    Expr::AggregateFunction(AggregateFunction::new_udf(
        avg_udaf(),
        vec![expr],
        false,
        None,
        vec![],
        None,
    ))
}

/// Stub `sum` used for optimizer testing
#[derive(Debug, PartialEq, Eq, Hash)]