Github user dongjoon-hyun commented on the issue:
https://github.com/apache/spark/pull/13969
In general, the noticeable big difference from Hive seems to be the
limitation on `first` and `second` arguments. Hive supports columns for them,
too.
IMHO, we can achieve that by putting all the `@transient private lazy val`
into `eval` function and moving the following feature into `findMethod` or
other places.
```
} else if (method == null) {
TypeCheckFailure("cannot find a method that matches the argument
types")
```
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