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https://issues.apache.org/jira/browse/HIVE-4041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13601919#comment-13601919
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Phabricator commented on HIVE-4041:
-----------------------------------
ashutoshc has commented on the revision "HIVE-4041 [jira] Support multiple
partitionings in a single Query".
First pass through patch. Some initial questions.
INLINE COMMENTS
ql/src/java/org/apache/hadoop/hive/ql/optimizer/ReduceSinkDeDuplication.java:415
Why do we need to do this null check here ?
ql/src/java/org/apache/hadoop/hive/ql/optimizer/ReduceSinkDeDuplication.java:425
Same question.
ql/src/java/org/apache/hadoop/hive/ql/parse/PTFTranslator.java:482 This will
set Order on all queries ?
Consider query like sum(i) over (partition by si) ... this doesn't need an
ordering, right ?
ql/src/java/org/apache/hadoop/hive/ql/optimizer/ColumnPrunerProcFactory.java:212
Why do we need to change this function?
REVISION DETAIL
https://reviews.facebook.net/D9381
To: JIRA, ashutoshc, hbutani
> Support multiple partitionings in a single Query
> ------------------------------------------------
>
> Key: HIVE-4041
> URL: https://issues.apache.org/jira/browse/HIVE-4041
> Project: Hive
> Issue Type: Bug
> Components: PTF-Windowing
> Reporter: Harish Butani
> Assignee: Harish Butani
> Attachments: HIVE-4041.D9381.1.patch, WindowingComponentization.pdf
>
>
> Currently we disallow queries if the partition specifications of all Wdw fns
> are not the same. We can relax this by generating multiple PTFOps based on
> the unique partitionings in a Query. For partitionings that only differ in
> sort, we can introduce a sort step in between PTFOps, which can happen in the
> same Reduce task.
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