Vectorize hash join collision check about datafusion HOT 4 CLOSED

    let mut to_check: Vec<(u64, usize)> = hash_values
        .iter()
        .enumerate()
        .flat_map(|(row, hash_value)| {
            build_hashmap
                .map
                .get(*hash_value, |(hash, _)| *hash_value == *hash)
                .map(|(_, v)| (*v - 1, row))
        })
        .collect();

    while to_check.len() > 0 {
        // TODO Perform column-wise (vectorized) equality check

        // check next items
        to_check = to_check
            .iter()
            .flat_map(|(index, row)| {
                let next = build_hashmap.next[*index as usize];
                (next != 0).then(|| (next - 1, *row))
            })
            .collect();
    }