Method logical_null_count

arrow-array/src/array/dictionary_array.rs:762–780

(&self)

    }

    fn logical_null_count(&self) -> usize {
        match (self.keys.nulls(), self.values.logical_nulls()) {
            (None, None) => 0,
            (Some(key_nulls), None) => key_nulls.null_count(),
            (None, Some(value_nulls)) => self
                .keys
                .values()
                .iter()
                .filter(|k| value_nulls.is_null(k.as_usize()))
                .count(),
            (Some(key_nulls), Some(value_nulls)) => self
                .keys
                .values()
                .iter()
                .enumerate()
                .filter(|(idx, k)| key_nulls.is_null(*idx) || value_nulls.is_null(k.as_usize()))
                .count(),
        }
    }

    fn is_nullable(&self) -> bool {
        !self.is_empty() && (self.nulls().is_some() || self.values.is_nullable())