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https://issues.apache.org/jira/browse/HIVE-12369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16439863#comment-16439863
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Hive QA commented on HIVE-12369:
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| (x) *{color:red}-1 overall{color}* |
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| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 14s{color}
| {color:red}
/data/hiveptest/logs/PreCommit-HIVE-Build-10255/patches/PreCommit-HIVE-Build-10255.patch
does not apply to master. Rebase required? Wrong Branch? See
http://cwiki.apache.org/confluence/display/Hive/HowToContribute for help.
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http://104.198.109.242/logs//PreCommit-HIVE-Build-10255/yetus.txt |
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This message was automatically generated.
> Native Vector GroupBy (Part 1)
> ------------------------------
>
> Key: HIVE-12369
> URL: https://issues.apache.org/jira/browse/HIVE-12369
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Reporter: Matt McCline
> Assignee: Matt McCline
> Priority: Critical
> Attachments: HIVE-12369.01.patch, HIVE-12369.02.patch,
> HIVE-12369.05.patch, HIVE-12369.06.patch, HIVE-12369.091.patch,
> HIVE-12369.094.patch, HIVE-12369.095.patch
>
>
> Implement Native Vector GroupBy using fast hash table technology developed
> for Native Vector MapJoin, etc.
> Patch is currently limited to a single Long key with a single COUNT
> aggregation. Or, a single Long key and no aggregation also known as
> duplicate reduction.
> 3 new classes introduces that stored the count in the slot table and don't
> allocate hash elements:
> {noformat}
> COUNT(column) VectorGroupByHashLongKeyCountColumnOperator
> COUNT(key) VectorGroupByHashLongKeyCountKeyOperator
> COUNT(*) VectorGroupByHashLongKeyCountStarOperator
> {noformat}
> And the duplicate reduction operator a single Long key:
> {noformat}
> VectorGroupByHashLongKeyDuplicateReductionOperator
> {noformat}
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