[
https://issues.apache.org/jira/browse/ARROW-10463?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17262867#comment-17262867
]
Ian Cook commented on ARROW-10463:
----------------------------------
[PR #9143|https://github.com/apache/arrow/pull/9143] improves the error message
that occurs when the user specifies unsupported readr-style options. The
example above would yield this error message:
{code:r}
Error: The following option is supported in "read_delim_arrow" functions but
not yet supported here: "na"
{code}
The added code matches both full and partial option names and improves handling
of several other modes of unsupported options.
> [R] Better messaging for currently unsupported CSV options in open_dataset
> --------------------------------------------------------------------------
>
> Key: ARROW-10463
> URL: https://issues.apache.org/jira/browse/ARROW-10463
> Project: Apache Arrow
> Issue Type: Bug
> Components: R
> Affects Versions: 2.0.0
> Reporter: Gabriel Bassett
> Assignee: Ian Cook
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.0.0
>
> Time Spent: 4h 40m
> Remaining Estimate: 0h
>
> While read_csv_arrow()'s signature matches readr, the
> readr_to_csv_parse_options() function (called by way of open_dataset()) only
> appears to capture a subset of those options:
> (https://github.com/apache/arrow/blob/883eb572bc64430307112895976ba79df10c8c7d/r/R/csv.R#L464)
> {code:java}
> readr_to_csv_parse_options <- function(delim = ",",
> quote = '"',
> escape_double = TRUE,
> escape_backslash = FALSE,
> skip_empty_rows = TRUE){code}
> I ran into this trying to use a non-standard 'na' value:
>
> {code:java}
> open_dataset("/path/to/csv/directory/", schema = sch, partitioning=NULL,
> format="csv", delim=";", na="\\N", escape_backslash=TRUE,
> escape_double=FALSE`)
> Error in readr_to_csv_parse_options(...) : unused argument (na = "\\N")
> {code}
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
