[jira] [Resolved] (ARROW-10623) [R] Version 1.0.1 breaks data.frame attributes when reading file written by 2.0.0

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

     [ https://issues.apache.org/jira/browse/ARROW-10623?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Neal Richardson resolved ARROW-10623.
-------------------------------------
    Resolution: Fixed

Issue resolved by pull request 9118
[https://github.com/apache/arrow/pull/9118]

> [R] Version 1.0.1 breaks data.frame attributes when reading file written by 2.0.0
> ---------------------------------------------------------------------------------
>
>                 Key: ARROW-10623
>                 URL: https://issues.apache.org/jira/browse/ARROW-10623
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: R
>    Affects Versions: 1.0.1, 2.0.0
>            Reporter: Fleur Kelpin
>            Assignee: Jonathan Keane
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 2.0.1, 3.0.0
>
>          Time Spent: 2h 20m
>  Remaining Estimate: 0h
>
> h4. How to reproduce
>  * Create a data frame:
> {noformat}
> df <- data.frame(col1 = 1:100){noformat}
>  * Write it to parquet file using apache 2.0.0. The demo uses R 3.6 but same happens if you use R 4.0
>  * Read the parquet file using apache 1.0.1. I only tried that in R 3.6
> h4. Expected
> The data frame is the same as it was before:
> {noformat}
> structure(list(col1 = 1:100), row.names = c(NA, 100L), class = "data.frame"){noformat}
> h4. Actual
> The data frame has lost some information:
> {noformat}
> structure(list(1:100), class = "data.frame"){noformat}
> h4. Demo
> I'm not sure what the easiest way is to put up a demo project for this, since you need to switch between arrow installations. But I've created this docker based demo:
> [https://github.com/fdlk/arrow2/]



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