Method len

datafusion/optimizer/src/join_key_set.rs:127–129

(&self)

    /// Return the length of this set
    #[cfg(test)]
    pub fn len(&self) -> usize {
        self.inner.len()
    }

    /// Return an iterator over the join keys in this set
    pub fn iter(&self) -> impl Iterator<Item = (&Expr, &Expr)> {