Method insert_all

datafusion/optimizer/src/join_key_set.rs:83–92

Inserts potentially many join keys into the set, copying only when necessary returns true if any of the pairs were inserted

(
        &mut self,
        iter: impl IntoIterator<Item = &'a (Expr, Expr)>,
    )

    ///
    /// returns true if any of the pairs were inserted
    pub fn insert_all<'a>(
        &mut self,
        iter: impl IntoIterator<Item = &'a (Expr, Expr)>,
    ) -> bool {
        let mut inserted = false;
        for (left, right) in iter.into_iter() {
            inserted |= self.insert(left, right);
        }
        inserted
    }

    /// Same as [`Self::insert_all`] but avoids cloning expressions if they are
    /// already owned