Method is_empty

src/repr/src/relation.rs:1089–1091

Check if the `RelationDesc` is empty.

(&self)

    /// Check if the `RelationDesc` is empty.
    pub fn is_empty(&self) -> bool {
        self == &Self::empty()
    }

    /// Returns the number of columns in this [`RelationDesc`].
    pub fn len(&self) -> usize {