Gunther Hagleitner created HIVE-6098:
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Summary: Merge Tez branch into trunk
Key: HIVE-6098
URL: https://issues.apache.org/jira/browse/HIVE-6098
Project: Hive
Issue Type: New Feature
Affects Versions: 0.12.0
Reporter: Gunther Hagleitner
Assignee: Gunther Hagleitner
I think the Tez branch is at a point where we can consider merging it back into
trunk after review.
Tez itself has had its first release, most hive features are available on Tez
and the test coverage is decent. There are a few known limitations, all of
which can be handled in trunk as far as I can tell (i.e.: None of them are
large disruptive changes that still require a branch.)
Limitations:
- Union all is not yet supported on Tez
- SMB is not yet supported on Tez
- Bucketed map-join is executed as broadcast join (bucketing is ignored)
Since the user is free to toggle hive.optimize.tez, it's obviously possible to
just run these on MR.
I am hoping to follow the approach that was taken with vectorization and shoot
for a merge instead of single commit. This would retain history of the branch.
Also in vectorization we required at least three +1s before merge, I'm hoping
to go with that as well.
I will add a combined patch to this ticket for review purposes (not for
commit). I'll also attach instructions to run on a cluster if anyone wants to
try.
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