nevi-me commented on pull request #511:
URL: https://github.com/apache/arrow-rs/pull/511#issuecomment-871751724
Hi @hohav, I've looked at all 3 versions, and I see that while this PR fixes
the repetition issue, it doesn't address your specific issue because of the
writer bug that I indicated in #385.
I see that you also tested against
```toml
arrow = { git = "https://github.com/apache/arrow-rs.git"; }
parquet = { git = "https://github.com/apache/arrow-rs.git"; }
```
I might have not been clear enough, I had meant for you to test against
```toml
arrow = { git = "https://github.com/nevi-me/arrow-rs.git";, branch =
"parquet-fix-levels" }
parquet = { git = "https://github.com/nevi-me/arrow-rs.git";, branch =
"parquet-fix-levels" }
```
It's not an issue though, as I've cloned your repro repo, and installed
parquet-mr tools to check what you're seeing.
The solution is two-fold, this PR, and then computing stats in #512 so that
we avoid the column writer computing these stats.
I don't have enough bandwidth to drive #512, would you be able to help with
it? I think the main tasks would be:
- checking that the stats for lists make sense (they should, but we probably
need tests)
- adding stats for fixed-len binary where it makes sense.
It would be a good exercise in digging into the arrow compute code.
CC @alamb @jorgecarleitao for a review.
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