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Posted to issues@arrow.apache.org by "AntoinePrv (via GitHub)" <gi...@apache.org> on 2025/10/21 14:58:35 UTC
[I] [C++][Parquet] Unpack function epilog [arrow]
AntoinePrv opened a new issue, #47895:
URL: https://github.com/apache/arrow/issues/47895
### Describe the enhancement requested
Right now, the `unpack` family of functions extract fewer elements than requested.
This is because it relies on batch extraction that must process many inputs at once.
Instead the `BitReader::GetBatch` is responsible for handling inputs before (prolog) and after (epilog) `unpack`.
This has two downsides:
- It makes the general parquet C++ logic harder to understand, as related functions are spread apart;
- I makes `unpack` harder to (re)use as it does not fully extract all that is needed. In particular, it makes it hard to iterate on these functions because the tests/benchmarks would need to adapt to the number of element that the function can work with.
The prolog and epilog should be moved to the `unpack` functions so that one function is fully responsible for unpacking integers without extra complexity.
### Component(s)
C++, Parquet
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Re: [I] [C++][Parquet] Unpack function epilog [arrow]
Posted by "pitrou (via GitHub)" <gi...@apache.org>.
pitrou commented on issue #47895:
URL: https://github.com/apache/arrow/issues/47895#issuecomment-3460778655
Issue resolved by pull request 47896
https://github.com/apache/arrow/pull/47896
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Re: [I] [C++][Parquet] Unpack function epilog [arrow]
Posted by "pitrou (via GitHub)" <gi...@apache.org>.
pitrou closed issue #47895: [C++][Parquet] Unpack function epilog
URL: https://github.com/apache/arrow/issues/47895
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