Function validate_unique_binary_keys

datafusion/functions-nested/src/map.rs:144–158

(
    null_count: usize,
    len: usize,
    values: impl IntoIterator<Item = &'a [u8]>,
)

}

fn validate_unique_binary_keys<'a>(
    null_count: usize,
    len: usize,
    values: impl IntoIterator<Item = &'a [u8]>,
) -> Result<()> {
    if null_count > 0 {
        return exec_err!("map key cannot be null");
    }

    if let Some(value) = find_duplicate_value(len, values) {
        return exec_err!("map key must be unique, duplicate key found: {:?}", value);
    }

    Ok(())
}

fn find_duplicate_value<T, I>(len: usize, values: I) -> Option<T>
where