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https://issues.apache.org/jira/browse/ARROW-6003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17026871#comment-17026871
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Neal Richardson commented on ARROW-6003:
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Seems better now. Rerunning the example from above:
{code}
> library(arrow)
> tf <- tempfile()
> write.table(iris, tf, sep = ",", row.names = FALSE, col.names = FALSE)
> reader <- CsvTableReader$create(tf,
> read_options=CsvReadOptions$create(column_names="just one name"))
> reader$Read()
Error in csv___TableReader__Read(self) :
Invalid: CSV parse error: Expected 1 columns, got 5
{code}
> [C++] Better input validation and error messaging in CSV reader
> ---------------------------------------------------------------
>
> Key: ARROW-6003
> URL: https://issues.apache.org/jira/browse/ARROW-6003
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++, R
> Reporter: Neal Richardson
> Priority: Major
> Labels: csv
>
> Followup to https://issues.apache.org/jira/browse/ARROW-5747. The error
> message(s) are not great when you give bad input. For example, if I give too
> many or too few {{column_names}}, the error I get is {{Invalid: Empty CSV
> file}}. In fact, that's about the only error message I've seen from the CSV
> reader, no matter what I've thrown at it.
> It would be better if error messages were more specific so that I as a user
> might know how to fix my bad input.
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