Scalar::is_zero is probably not correct for FixedSizeList and Struct #7891

    /// Returns `true` if the [`Scalar`] has a non-null zero value.
    ///
    /// Returns `None` if the scalar is null, otherwise returns `Some(true)` if the value is zero
    /// and `Some(false)` otherwise.
    pub fn is_zero(&self) -> Option<bool> {
        let value = self.value()?;

        let is_zero = match self.dtype() {
            ...
            DType::FixedSizeList(_, list_size, _) => value.as_list().len() == *list_size as usize,
            DType::Struct(struct_fields, _) => value.as_list().len() == struct_fields.nfields(),
            ...
        };

        Some(is_zero)
    }