j0bekt01 opened a new issue, #34649:
URL: https://github.com/apache/arrow/issues/34649
### Describe the usage question you have. Please include as many useful
details as possible.
How do you scan nested structs in R? This is what I tried so far but to no
avail:
`PATH <- "s3 URI path"`
`df <- arrow::open_dataset(sources=PATH)`
`scan_builder <- df$NewScan()`
Neither of these works.
`scan_builder$Project(list(doc_id = Expression$field_ref("document.id")))`
`scan_builder$Project(list(doc_id = Expression$field_ref("document.id")))`
However, if I do:
`scan_builder$Project(list(doc_id = Expression$field_ref("document")))`
works but I don't want the entire nested object imported into R.
### Component(s)
R
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