Github user gatorsmile commented on the pull request:
https://github.com/apache/spark/pull/10577#issuecomment-169216470
Major changes in this commit:
- Combine the Union during the construction (i.e., in the DataFrame and
Dataset APIs)
- Use tail recursive with extractor object to reimplement the rule
`CombineUnions`
- Rename the operator `Unions` to `Union`
- Fix bugs
Todo:
- Change the optimizer rule for pushing Filter and Project through
Unions.
---
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 infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
