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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2020/10/17 17:51:36 UTC
[GitHub] [arrow] nevi-me opened a new pull request #8484: ARROW-10334: [Rust] [Parquet] NullArray roundtrip
nevi-me opened a new pull request #8484:
URL: https://github.com/apache/arrow/pull/8484
This allows writing an Arrow NullArray to Parquet.
Support was added a few years ago in Parquet, and the C++ implementation supports writing null arrays.
The array is stored as an int32 which has all values set as null.
In order to implement this, we introduce a `null -> int32` cast, which creates a null int32 of same length.
Semantically, the write is the same as writing an int32 that's all null, but we create a null writer to preserve the data type.
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[GitHub] [arrow] nevi-me closed pull request #8484: ARROW-10334: [Rust] [Parquet] NullArray roundtrip
Posted by GitBox <gi...@apache.org>.
nevi-me closed pull request #8484:
URL: https://github.com/apache/arrow/pull/8484
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[GitHub] [arrow] github-actions[bot] commented on pull request #8484: ARROW-10334: [Rust] [Parquet] NullArray roundtrip
Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on pull request #8484:
URL: https://github.com/apache/arrow/pull/8484#issuecomment-711058930
https://issues.apache.org/jira/browse/ARROW-10334
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[GitHub] [arrow] nevi-me commented on pull request #8484: ARROW-10334: [Rust] [Parquet] NullArray roundtrip
Posted by GitBox <gi...@apache.org>.
nevi-me commented on pull request #8484:
URL: https://github.com/apache/arrow/pull/8484#issuecomment-711066007
Low risk, I'm happy with test coverage; closing it to reduce the queue pending merge on the branch.
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