Ian Cook created ARROW-11880:
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             Summary: [R] Handle empty or NULL transmute() args properly
                 Key: ARROW-11880
                 URL: https://issues.apache.org/jira/browse/ARROW-11880
             Project: Apache Arrow
          Issue Type: Bug
          Components: R
            Reporter: Ian Cook
             Fix For: 4.0.0


The following examples should all return results with zero columns. Currently 
they return _all_ the columns. This applies to Tables, RecordBatches, and 
Datasets:
 * {{transmute()}}
 * {{transmute(NULL)}}
 * {{transmute(x = NULL, y = NULL, z = NULL)}}



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