[jira] [Commented] (ARROW-12992) [R] bindings for substr(), substring(), str_sub()

["Mauricio 'Pachá' Vargas Sepúlveda (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-12992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17371572#comment-17371572 ] 

Mauricio 'Pachá' Vargas Sepúlveda commented on ARROW-12992:
-----------------------------------------------------------

I have a bad sub_str. I'll complete it and send it. This can be a 1/3 2/3 Pr with [~thisisnic] 

> [R] bindings for substr(), substring(), str_sub()
> -------------------------------------------------
>
>                 Key: ARROW-12992
>                 URL: https://issues.apache.org/jira/browse/ARROW-12992
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: R
>            Reporter: Neal Richardson
>            Assignee: Nic Crane
>            Priority: Major
>             Fix For: 5.0.0
>
>
> Followup to ARROW-10557, which implemented the C++
> current state:
> {code:r}
> library(arrow)
> library(dplyr)
> library(stringr)
> # get animal products, year 20919
> open_dataset(
>   "../cepii-datasets-arrow/parquet/baci_hs92",
>   partitioning = c("year", "reporter_iso")
> ) %>% 
>   filter(
>     year == 2019,
>     str_sub(product_code, 1, 2) == "01"
>   ) %>% 
>   collect()
> Error: Filter expression not supported for Arrow Datasets: str_sub(product_code, 1, 2) == "01"
> Call collect() first to pull data into R.
> {code}



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