[jira] [Created] (ARROW-13866) [R] Implement Options for all compute kernels available via list_compute_functions

["Nic Crane (Jira)" <ji...@apache.org>]

Nic Crane created ARROW-13866:
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             Summary: [R] Implement Options for all compute kernels available via list_compute_functions
                 Key: ARROW-13866
                 URL: https://issues.apache.org/jira/browse/ARROW-13866
             Project: Apache Arrow
          Issue Type: Improvement
          Components: R
            Reporter: Nic Crane


I'm writing a section in the cookbook about calling kernels which don't have R bindings.  I'm using {{utf8_ltrim}} as an example - it appears when we call {{list_compute_functions()}}.  I tried to call it by searching for it in the C++ code, seeing that it requires a TrimOptions class of options, and then saw that it has a single parameter, characters.

I tried calling {{call_function("utf8_ltrim", Array$create(c("abc", "abacus", "abracadabra")), options = list(characters = "ab"))}} to see what would happen, which resulted in:
{{Error: Invalid: Attempted to initialize KernelState from null FunctionOptions}}

This is because TrimOptions isn't implemented in arrow/r/src/compute.cpp.  We should go through all the compute functions listed via {{list_compute_functions()}} and ensure all of them have options implemented.



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