thisisnic commented on PR #14371:
URL: https://github.com/apache/arrow/pull/14371#issuecomment-1277736645
Currently getting this error message in the unit tests, due to weirdness
with trying to create 0-length arrays using extension types :grimacing:
Will try to create a nice reprex/solution/workaround, but if anyone has any
suggestions in the meantime, let me know.
```
Error (test-extension.R:340:3): Dataset/arrow_dplyr_query can roundtrip
extension types
Error: NotImplemented: MakeBuilder: cannot construct builder for type
<arrow_custom_vctr[0]>
/home/nic2/arrow/cpp/src/arrow/builder.cc:289 VisitTypeInline(*type, &impl)
Backtrace:
1. ... %>% dplyr::collect()
at test-extension.R:340:2
4. arrow::select.Dataset(., number, letter, extension)
5. arrow::column_select(.data, enquos(...), op = "select")
at r/R/dplyr-select.R:24:2
6. arrow::simulate_data_frame(implicit_schema(.data))
at r/R/dplyr-select.R:97:2
8. arrow::Table__from_schema(schema)
```
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