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https://issues.apache.org/jira/browse/HIVE-12290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14984273#comment-14984273
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Lefty Leverenz commented on HIVE-12290:
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Doc note: This adds *hive.vectorized.execution.reducesink.new.enabled* to
HiveConf.java, so it needs to be documented in the wiki for release 2.0.0.
* [Configuration Properties -- Query and DDL Execution |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-QueryandDDLExecution]
Adding a TODOC2.0 label.
> Native Vector ReduceSink
> ------------------------
>
> Key: HIVE-12290
> URL: https://issues.apache.org/jira/browse/HIVE-12290
> Project: Hive
> Issue Type: Improvement
> Components: Hive
> Reporter: Matt McCline
> Assignee: Matt McCline
> Priority: Critical
> Labels: TODOC2.0
> Fix For: 2.0.0
>
> Attachments: HIVE-12290.01.patch, HIVE-12290.02.patch,
> HIVE-12290.03.patch, HIVE-12290.04.patch, HIVE-12290.05.patch,
> HIVE-12290.06.patch
>
>
> Currently, VectorReduceSinkOperator is a pass-thru to ReduceSinkOperator, so
> we incur object inspector costs.
> Native vectorization will not use object inspectors and allocate memory up
> front that will be reused for each batch.
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