coalesce

Function coalesce 

Source
pub fn coalesce<T, x, y>(
    x: x,
    y: y,
) -> coalesce<T, <x as AsExpression<Nullable<T>>>::Expression, <y as AsExpression<T>>::Expression>
where T: SqlType + SingleValue, x: AsExpression<Nullable<T>>, y: AsExpression<T>,