[jira] [Updated] (ARROW-16612) [R] Fix compression inference from filename

["Neal Richardson (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-16612?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Neal Richardson updated ARROW-16612:
------------------------------------
    Fix Version/s: 9.0.0

> [R] Fix compression inference from filename
> -------------------------------------------
>
>                 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: Major
>              Labels: pull-request-available
>             Fix For: 9.0.0
>
>          Time Spent: 1h
>  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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