yaooqinn edited a comment on pull request #28106:
URL: https://github.com/apache/spark/pull/28106#issuecomment-625671160
One more thing, the scope that the `try` can cover is not that large you
have imagined. The cases you listed is actually are all invalid, e.g. sum(a,
b)???
```sql
yaooqinn edited a comment on pull request #28106:
URL: https://github.com/apache/spark/pull/28106#issuecomment-625648533
I see the concerns.
The behavior of `try` here is simply that it wraps a `try-catch` for its
root child expression. And the meanings of `try` will be spread based
