On Mon, 9 Sep 2019, Neal Richardson wrote:
Hi Daniel,
This works on my machine:
library(arrow)
write_parquet(data.frame(y = c("a", "b", "c"), stringsAsFactors=FALSE), file=
"string.parquet")
read_parquet("string.parquet")
y
1 a
2 b
3 c
(The function masking warnings are all from library(tidyverse) and
aren't relevant here.)
What OS are you on, and how did you install the arrow package? I'm on
macOS and installed arrow from CRAN, but if that's not the case for
you, then your C++ library may have different capabilities.
Here are the details of our installation:
1) OS:
------
Scientific Linux 7
uname: Linux 3.10.0-957.1.3.el7.x86_64 #1 SMP Mon Nov 26 12:36:06 CST 2018
x86_64 x86_64 x86_64 GNU/Linux
2) gcc version:
----------------
# gcc --version
gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36)
3) arrow and parquet library installation:
------------------------------------------
yum install arrow-devel parquet-devel
versions:
arrow-devel: yum info arrow-devel
Installed Packages
Name : arrow-devel
Arch : x86_64
Version : 0.14.1
Release : 1.el7
Size : 20 M
Repo : installed
From repo : apache-arrow
Summary : Libraries and header files for Apache Arrow C++
URL : https://arrow.apache.org/
License : Apache-2.0
Description : Libraries and header files for Apache Arrow C++.
yum info parquet-devel
Installed Packages
Name : parquet-devel
Arch : x86_64
Version : 0.14.1
Release : 1.el7
Size : 6.4 M
Repo : installed
From repo : apache-arrow
Summary : Libraries and header files for Apache Parquet C++
URL : https://arrow.apache.org/
License : Apache-2.0
Description : Libraries and header files for Apache Parquet C++.
4) R arrow installation:
--------------------------
install.packages("arrow")
and also
install.packages("sparklyr")
Thanks for taking an interest.
Daniel Feenberg
