Javier Luraschi created ARROW-3780:
--------------------------------------

             Summary: [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


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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