Neal Richardson created ARROW-13799:
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Summary: [R] case_when error handling is capturing strings
Key: ARROW-13799
URL: https://issues.apache.org/jira/browse/ARROW-13799
Project: Apache Arrow
Issue Type: Bug
Components: R
Reporter: Neal Richardson
Fix For: 6.0.0
This test, now unskipped since case_when supports string data, fails:
{code}
expect_dplyr_equal(
input %>%
mutate(
cw = case_when(!(!(!(lgl))) ~ factor(chr), TRUE ~ fct)
) %>%
collect(),
tbl
)
{code}
On inspection, it seems that `factor(chr)` is hitting `base::factor()`, which
tries to call `unique()` on the Expression and that fails with "unique()
applies only to vectors". This is getting propagated through to the resulting
dataset column because `arrow_eval()` returns a `try-error` on error and
`nse_funcs$case_when()` isn't checking for errors.
cc [~icook]
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