You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: parameterized_vec_vec_int_op.rs
    path of file: ./repos/LocustDB/src/engine/operators
    
    the code of the file until where you have to start completion: use std::fmt;
use std::marker::PhantomData;

use crate::engine::*;


#[derive(Debug)]
pub struct ParameterizedVecVecIntegerOperator<Op> {
    pub lhs: BufferRef<i64>,
    pub rhs: BufferRef<i64>,
    pub output: BufferRef<i64>,
    pub parameter:
    
    fn execute(&mut self, stream: bool, scratchpad: &mut Scratchpad<'a>) -> Result<(), QueryError>{
        let mut output = scratchpad.get_mut(self.output);
        let lhs = scratchpad.get(self.lhs);
        let rhs = scratchpad.get(self.rhs);
        if stream { output.clear(); }
        for (l, r) in lhs.iter().zip(rhs.iter()) {
            output.push(Op::perform(*l, *r, self.parameter));
        }
        Ok(())
    }