unexport the important fields of `statistics.Column` and `statistics.Index`
Open
type/enhancement
- Dominant language
- Go
- Stars
- 40.5k
- Forks
- 6.2k
- PR merge metrics
- PR metrics pending
Description
## Enhancement
To make the `MemoryUsage` be `O(1)` safely. We need to make sure that the fields of `Column` and `Index` is not changed by accident.
Hence, we are going to unexport the important fields of them.
Contributor guide
Assessment
This issue has not been assessed yet.