[jira] [Updated] (ARROW-10485) [R] open_dataset(): specifying partition when hive_style =TRUE fails silently

["Nicola Crane (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-10485?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Nicola Crane updated ARROW-10485:
---------------------------------
    Fix Version/s: 7.0.0

> [R] open_dataset(): specifying partition when hive_style =TRUE fails silently
> -----------------------------------------------------------------------------
>
>                 Key: ARROW-10485
>                 URL: https://issues.apache.org/jira/browse/ARROW-10485
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: R
>    Affects Versions: 2.0.0
>         Environment: MacOS Catalina 10.15.7 (19H2), R 4.01, arrow R package v2.0.0
>            Reporter: John Sheffield
>            Assignee: Ben Kietzman
>            Priority: Minor
>             Fix For: 7.0.0
>
>
> When writing a dataset with hive_style = TRUE, now the default, that dataset has to be opened without an explicit definition of the partitions to work as expected. Even if the correct partition is specified, any query to the dataset on the partition field returns 0 rows.
>  
> From my eyes as a user, I'd want this to error out specifically (not just warn), probably when first calling open_dataset().
> {code:r}
> data("mtcars")
> arrow::write_dataset(
>     dataset = mtcars, path = "mtcarstest", partitioning = "cyl",
>     format = "parquet", hive_style = TRUE)
> mtc1 <- arrow::open_dataset("mtcarstest", partitioning = "cyl")
> mtc2 <- arrow::open_dataset("mtcarstest")
> mtc1 %>%
>      dplyr::filter(cyl == 4) %>%
>      collect()
> mtc2 %>%
>      dplyr::filter(cyl == 4) %>%
>      collect()
>  {code}



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