[jira] [Created] (ARROW-12792) [R] FileSystemDataset incorrectly reports CSVs as parquet files

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

Nic Crane created ARROW-12792:
---------------------------------

             Summary: [R] FileSystemDataset incorrectly reports CSVs as parquet files
                 Key: ARROW-12792
                 URL: https://issues.apache.org/jira/browse/ARROW-12792
             Project: Apache Arrow
          Issue Type: Bug
          Components: R
            Reporter: Nic Crane
            Assignee: Nic Crane


I was running the following code:
{code:java}
tf <- tempfile()
dir.create(tf)
on.exit(unlink(tf))
write_csv_arrow(mtcars[1:5,], file.path(tf, "file1.csv"))
write_csv_arrow(mtcars[6:11,], file.path(tf, "file2.csv"))
# ds <- open_dataset(c(file.path(tf, "file1.csv"), file.path(tf, "file2.csv")))
ds <- open_dataset(c(file.path(tf, "file1.csv"), file.path(tf, "file2.csv")), 
                   schema = Table$create(mtcars)$schema
                   )
{code}
But when I print the ds object, it reports that the files are Parquet files not CSVs

> ds
FileSystemDataset with 2 Parquet files
mpg: double
cyl: double
disp: double
hp: double
drat: double
wt: double
qsec: double
vs: double
am: double
gear: double
carb: double



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