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Posted to github@arrow.apache.org by "Jefffrey (via GitHub)" <gi...@apache.org> on 2023/11/14 12:04:16 UTC
[I] Parquet: derive boundary order when writing columns [arrow-rs]
Jefffrey opened a new issue, #5074:
URL: https://github.com/apache/arrow-rs/issues/5074
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See https://github.com/apache/arrow-rs/blob/7ba36b012322e08b06184c806f8ba339181cebc1/parquet/src/file/metadata.rs#L888-L889
From parquet thrift:
https://github.com/apache/parquet-format/blob/46cc3a0647d301bb9579ca8dd2cc356caf2a72d2/src/main/thrift/parquet.thrift#L982-L988
```
/**
* Stores whether both min_values and max_values are ordered and if so, in
* which direction. This allows readers to perform binary searches in both
* lists. Readers cannot assume that max_values[i] <= min_values[i+1], even
* if the lists are ordered.
*/
4: required BoundaryOrder boundary_order
```
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Some additional reading/discussion;
https://github.com/apache/parquet-format/blob/master/PageIndex.md
https://github.com/apache/arrow-rs/pull/5003#discussion_r1389675899
- Need to ensure for special types like Float16 where sort order differs from its physical type representation that this is accounted for & tested
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Re: [I] Parquet: derive boundary order when writing columns [arrow-rs]
Posted by "tustvold (via GitHub)" <gi...@apache.org>.
tustvold commented on issue #5074:
URL: https://github.com/apache/arrow-rs/issues/5074#issuecomment-1878522760
`label_issue.py` automatically added labels {'parquet'} from #5110
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Re: [I] Parquet: derive boundary order when writing columns [arrow-rs]
Posted by "Jefffrey (via GitHub)" <gi...@apache.org>.
Jefffrey commented on issue #5074:
URL: https://github.com/apache/arrow-rs/issues/5074#issuecomment-1819813285
Planning to take a shot at this
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Re: [I] Parquet: derive boundary order when writing columns [arrow-rs]
Posted by "tustvold (via GitHub)" <gi...@apache.org>.
tustvold closed issue #5074: Parquet: derive boundary order when writing columns
URL: https://github.com/apache/arrow-rs/issues/5074
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