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Jonathan Keane
0059d6113ac
Jonathan Keane authored b868090f0f6
ARROW-13465: [R] to_arrow() from duckdb

~This isn't yet fully functional, but I've unmarked `[WIP]` to get fuller CI on it.~

This now works, something like:

```
ds <- InMemoryDataset$create(mtcars)

ds %>%
  filter(mpg < 30) %>%
  to_duckdb() %>%
  group_by(cyl) %>%
  summarize(mean_mpg = mean(mpg, na.rm = TRUE)) %>%
  to_arrow() %>%
  collect()
```

Closes #11032 from jonkeane/ARROW-13465-to_arrow-from-duckdb

Authored-by: Jonathan Keane <jkeane@gmail.com>
Signed-off-by: Jonathan Keane <jkeane@gmail.com>