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https://issues.apache.org/jira/browse/HIVE-22448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesus Camacho Rodriguez updated HIVE-22448:
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Status: Patch Available (was: In Progress)
> CBO: Expand the multiple count distinct with a group-by key
> -----------------------------------------------------------
>
> Key: HIVE-22448
> URL: https://issues.apache.org/jira/browse/HIVE-22448
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Reporter: Gopal Vijayaraghavan
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
> Attachments: HIVE-22448.patch
>
>
> {code}
> create temporary table mytable1 (x integer, y integer, z integer, a integer);
> explain cbo
> select z, x, count(distinct y), count(distinct a)
> from mytable1
> group by z, x;
> explain cbo
> select z, x, count(distinct y), count(distinct a)
> from mytable1
> {code}
> The first is not vectorized, the second one is because of the grouping-set
> based rewrite for count distinct.
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