zero323 commented on pull request #28386:
URL: https://github.com/apache/spark/pull/28386#issuecomment-728475705
In isolation it seems sensible.
What bothers me though, is that `mutate` and `select` have different
behavior.
```r
> select(sql("SELECT * FROM range(1)"), log(lit(1 + 1 + 1)))
SparkDataFrame[ln(3.0):double]
> mutate(sql("SELECT * FROM range(1)"), log(lit(1 + 1 + 1)))
SparkDataFrame[id:bigint, log(lit(1 + 1 + 1)):double]
```
Ideally, we'd like both to behave the same way (possibly resolving the
problem we have here completely), that's however a breaking change.
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