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Posted to issues@arrow.apache.org by "Dewey Dunnington (Jira)" <ji...@apache.org> on 2022/05/03 13:44:00 UTC

[jira] [Created] (ARROW-16444) [R] Implement user-defined scalar functions in R bindings

Dewey Dunnington created ARROW-16444:
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             Summary: [R] Implement user-defined scalar functions in R bindings
                 Key: ARROW-16444
                 URL: https://issues.apache.org/jira/browse/ARROW-16444
             Project: Apache Arrow
          Issue Type: Improvement
          Components: R
            Reporter: Dewey Dunnington


In ARROW-15639, user-defined (scalar) functions were implemented for Python. In ARROW-15841 and ARROW-15168 we developed some tooling and strategies for calling into R from non-R threads, so in theory we should be able to mirror the Python implementation (possibly with the constraint that we have to provide a way to return a {{Table}} instead of a {{RecordBatchReader}} if there are any user-defined functions, otherwise we can't guarantee the existence of an event loop to do the R evaluating?).



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