Carl Boettiger created ARROW-15822:
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Summary: arrow_write_csv cannot write difftime objects
Key: ARROW-15822
URL: https://issues.apache.org/jira/browse/ARROW-15822
Project: Apache Arrow
Issue Type: Bug
Components: R
Affects Versions: 7.0.0, 7.0.1
Reporter: Carl Boettiger
Consider this reprex:
{code:java}
arrow::write_csv_arrow(data.frame(time = as.difftime(1, units="secs")),
"test.csv"){code}
This errors with:
Error: NotImplemented: Unsupported cast from duration[s] to utf8 using function
cast_string
Note that readr::write_csv() has no trouble with this (which renders the data
as "1" without a unit). Arguably the readr rendering is lossy, but then we
usually assume units are provided in other metadata anyway.
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