Github user gatorsmile commented on the pull request:
https://github.com/apache/spark/pull/11555#issuecomment-194188133
For example, given the following sub-plan:
```
Project a.key, b.key
Join
```
Assuming we still have a multiple operators above this sub-plan and these
operators are using both `a.key` and `b.key`, we will hit an issue if we add
extra subquery. In SQL generation, both of them will be `t.key` and `t.key`.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
