Github user scwf commented on the pull request:
https://github.com/apache/spark/pull/4075#issuecomment-70386657
@marmbrus after my investigate i think it is very rare case we will
optimize GroupExpressions.
Should our optimization cover sql such as ```SELECT a, b, count(*) FROM T1
GROUP BY a, b, 1+1 GROUPING SETS (1+1, a, (a, b), b, ())```? if not maybe we do
not need to optimize it, then the change of this PR is safe.
---
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]
