[jira] [Commented] (ARROW-3780) [R] Failed to fetch data: invalid data when collecting int16

["Wes McKinney (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-3780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16685675#comment-16685675 ] 

Wes McKinney commented on ARROW-3780:
-------------------------------------

I was pretty sure this non-specific error message was going to rear its ugly head

https://github.com/apache/arrow/blob/202265fbb67685f1ed179ba080a85b48fbd53adc/r/src/arrow_types.h#L36

> [R] Failed to fetch data: invalid data when collecting int16
> ------------------------------------------------------------
>
>                 Key: ARROW-3780
>                 URL: https://issues.apache.org/jira/browse/ARROW-3780
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: R
>            Reporter: Javier Luraschi
>            Priority: Major
>              Labels: spark
>             Fix For: 0.12.0
>
>
> Repro from sparklyr unit test:
> {code:java}
> library(dplyr)
> library(sparklyr)
> library(arrow)
> sc <- spark_connect(master = "local")
> hive_type <- tibble::frame_data(
>  ~stype, ~svalue, ~rtype, ~rvalue, ~arrow,
>  "smallint", "1", "integer", "1", "integer",
> )
> spark_query <- hive_type %>%
>  mutate(
>  query = paste0("cast(", svalue, " as ", stype, ") as ", gsub("\\(|\\)", "", stype), "_col")
>  ) %>%
>  pull(query) %>%
>  paste(collapse = ", ") %>%
>  paste("SELECT", .)
> spark_types <- DBI::dbGetQuery(sc, spark_query) %>%
>  lapply(function(e) class(e)[[1]]) %>%
>  as.character(){code}
> Actual: error: Failed to fetch data: invalid data 



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