You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@arrow.apache.org by "Nicola Crane (Jira)" <ji...@apache.org> on 2021/11/17 22:32:00 UTC
[jira] [Created] (ARROW-14744) [R] open_dataset() error when `schema` argument supplied, but `column_names` not supplied to `CSVReadOptions`
Nicola Crane created ARROW-14744:
------------------------------------
Summary: [R] open_dataset() error when `schema` argument supplied, but `column_names` not supplied to `CSVReadOptions`
Key: ARROW-14744
URL: https://issues.apache.org/jira/browse/ARROW-14744
Project: Apache Arrow
Issue Type: Bug
Components: R
Reporter: Nicola Crane
Note: this occurs regardless of whether the data has a header or not
{code:r}
td <- tempfile()
dir.create(td)
readr::write_csv(ggplot2::diamonds, file=file.path(td, 'diamonds.csv'), col_names=FALSE)
readLines(file.path(td, "diamonds.csv"), n = 2)
open_dataset(
td,
format = 'csv',
schema = diamond_schema,
partitioning = NULL,
skip_rows = 1,
unify_schemas = FALSE,
read_options = arrow::CsvReadOptions$create(
skip_rows = 1,
column_names = names(diamond_schema)
)
) %>%
collect()
# # A tibble: 53,939 × 10
# carat cut color clarity depth table price x y z
# <dbl> <chr> <chr> <chr> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
# 1 0.21 Premium E SI1 59.8 61 326 3.89 3.84 2.31
# 2 0.23 Good E VS1 56.9 65 327 4.05 4.07 2.31
# 3 0.29 Premium I VS2 62.4 58 334 4.2 4.23 2.63
# 4 0.31 Good J SI2 63.3 58 335 4.34 4.35 2.75
# 5 0.24 Very Good J VVS2 62.8 57 336 3.94 3.96 2.48
# 6 0.24 Very Good I VVS1 62.3 57 336 3.95 3.98 2.47
# 7 0.26 Very Good H SI1 61.9 55 337 4.07 4.11 2.53
# 8 0.22 Fair E VS2 65.1 61 337 3.87 3.78 2.49
# 9 0.23 Very Good H VS1 59.4 61 338 4 4.05 2.39
# 10 0.3 Good J SI1 64 55 339 4.25 4.28 2.73
# # … with 53,929 more rows
open_dataset(
td,
format='csv',
schema = diamond_schema,
skip_rows = 1,
read_options=arrow::CsvReadOptions$create(skip_rows=1)) %>%
collect()
# # A tibble: 53,938 × 10
# carat cut color clarity depth table price x y z
# <dbl> <chr> <chr> <chr> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
# 1 NA NA NA NA NA NA NA NA NA NA
# 2 NA NA NA NA NA NA NA NA NA NA
# 3 NA NA NA NA NA NA NA NA NA NA
# 4 NA NA NA NA NA NA NA NA NA NA
# 5 NA NA NA NA NA NA NA NA NA NA
# 6 NA NA NA NA NA NA NA NA NA NA
# 7 NA NA NA NA NA NA NA NA NA NA
# 8 NA NA NA NA NA NA NA NA NA NA
# 9 NA NA NA NA NA NA NA NA NA NA
# 10 NA NA NA NA NA NA NA NA NA NA
# # … with 53,928 more rows
{code}
--
This message was sent by Atlassian Jira
(v8.20.1#820001)