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: merge_drop.rs
    path of file: ./repos/LocustDB/src/engine/operators
    
    the code of the file until where you have to start completion: use crate::engine::*;

#[derive(Debug)]
pub struct MergeDrop<T> {
    pub merge_ops: BufferRef<MergeOp>,
    pub left: BufferRef<T>,
    pub right: BufferRef<T>,
    pub deduplicated: BufferRef<T>,
}

impl<'a, T: VecData<T> + 'a> VecOperator<'a> for MergeDrop<T> {
    fn execute(&mut self, _: bool, scratchpad: &mut Scratchp
    
    fn execute(&mut self, _: bool, scratchpad: &mut Scratchpad<'a>) -> Result<(), QueryError> {
        let deduplicated = {
            let ops = scratchpad.get(self.merge_ops);
            let left = scratchpad.get(self.left);
            let right = scratchpad.get(self.right);
            merge_drop(&ops, &left, &right)
        };
        scratchpad.set(self.deduplicated, deduplicated);
        Ok(())
    }