[jira] [Created] (ARROW-13543) [R] Errors when no aggregate function in summarise()

["Ian Cook (Jira)" <ji...@apache.org>]

Ian Cook created ARROW-13543:
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             Summary: [R] Errors when no aggregate function in summarise()
                 Key: ARROW-13543
                 URL: https://issues.apache.org/jira/browse/ARROW-13543
             Project: Apache Arrow
          Issue Type: Bug
          Components: R
            Reporter: Ian Cook
             Fix For: 6.0.0


Following ARROW-13344, we should handle the case in which the user calls {{summarise()}} but does not call any aggregate functions in it.

Currently this is unhandled and results in errors (which are then are converted to warnings) like:
{code:java}
Warning: Error in x[c("fun", "options")] : object of type 'environment' is not subsettable ; pulling data into R{code}
or when the expression has only scalar literals:
{code:java}
Warning: Error : $ operator is invalid for atomic vectors
; pulling data into R {code}
We should aim for consistency with {{dplyr::summarise()}} but if that's not practical then we should detect this case and throw a more informative error.



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