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https://issues.apache.org/jira/browse/ARROW-16612?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neal Richardson updated ARROW-16612:
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Summary: [R] Support inferring compression from filename for all
readers/writers (was: [R] parquet files with compression extensions should use
parquet writer for compression)
> [R] Support inferring compression from filename for all readers/writers
> -----------------------------------------------------------------------
>
> Key: ARROW-16612
> URL: https://issues.apache.org/jira/browse/ARROW-16612
> Project: Apache Arrow
> Issue Type: Bug
> Components: R
> Affects Versions: 8.0.0
> Reporter: Sam Albers
> Assignee: Neal Richardson
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Right now arrow will silently write a file with a .gz extension to
> CompressedOutputStream rather than passing the compression option to the
> parquet writer itself. The internal detect_compression() function detects the
> extension and that is what passes it off incorrectly. However it only fails
> at the read_parquet stage which could lead to confusion.
> {code:java}
> library(arrow, warn.conflicts = FALSE)
> tf <- tempfile(fileext = ".parquet.gz")
> write_parquet(data.frame(x = 1:5), tf, compression = "gzip",
> compression_level = 5) read_parquet(tf)
> #> Error: file must be a "RandomAccessFile"{code}
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