[jira] [Commented] (ARROW-9218) Numeric columns turn to string when imported in R

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

    [ https://issues.apache.org/jira/browse/ARROW-9218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17143911#comment-17143911 ] 

Neal Richardson commented on ARROW-9218:
----------------------------------------

Could you please share code and/or a sample file that reproduces this behavior?

> Numeric columns turn to string when imported in R
> -------------------------------------------------
>
>                 Key: ARROW-9218
>                 URL: https://issues.apache.org/jira/browse/ARROW-9218
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: R
>    Affects Versions: 0.17.1
>            Reporter: David Cortes
>            Priority: Major
>
> If I create a snappy-compressed parquet file from a DataFrame in spark or pandas, and then import this same file into R using:
> {code:java}
> arrow::read_parquet(the_file, as_data_frame=TRUE)
> {code}
> or
> {code:java}
> arrow::read_parquet(the_file, as_data_frame=FALSE){code}
> Then the columns that were numeric/float before will load as strings.
> Loading the same file in Python through
> {code:java}
> pd.read_parquet(the_file)
> {code}
> Will correctly interpret numeric columns as numeric.
>  
> Integer columns seem to be read as integers however.



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