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https://issues.apache.org/jira/browse/ARROW-8981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17299129#comment-17299129
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Ben Kietzman commented on ARROW-8981:
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I'm not sure this is worthwhile, actually. I think that the cases where
FileSources could benefit from blanket compression are slim (it's highly that
parquet would be read from a gzipped file). I think it'd be better to support
compression on a per-FileFormat basis (an option for or variant of
CsvFileFormat for example)
> [C++][Dataset] Add support for compressed FileSources
> -----------------------------------------------------
>
> Key: ARROW-8981
> URL: https://issues.apache.org/jira/browse/ARROW-8981
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Affects Versions: 0.17.1
> Reporter: Ben Kietzman
> Priority: Major
> Labels: dataset
>
> FileSource::compression_ is currently ignored. Ideally files/buffers which
> are compressed could be decompressed on read. See ARROW-8942
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