Dandandan commented on pull request #8860:
URL: https://github.com/apache/arrow/pull/8860#issuecomment-742653929
So the proposal would be to change the statistics struct to
```rust
pub struct Statistics {
/// The number of table rows
pub num_rows: Option<usize>,
/// total byte of the table rows
pub total_byte_size: Option<usize>,
}
```
and the Statistics doesn't need to be wrapped as `Option<Statistics>`
anymore.
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