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https://issues.apache.org/jira/browse/HIVE-11172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14636010#comment-14636010
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Sushanth Sowmyan commented on HIVE-11172:
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Incorrect results makes it a good candidate for a backport to branch-1.2.
Pedantic note : 1.2.1 has already shipped. This would go in 1.2.2, please set
fix version appropriately after committing.
> Vectorization wrong results for aggregate query with where clause without
> group by
> ----------------------------------------------------------------------------------
>
> Key: HIVE-11172
> URL: https://issues.apache.org/jira/browse/HIVE-11172
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Affects Versions: 0.14.0
> Reporter: Yi Zhang
> Assignee: Hari Sankar Sivarama Subramaniyan
> Priority: Critical
> Fix For: 2.0.0
>
> Attachments: HIVE-11172.1.patch, HIVE-11172.2.patch,
> HIVE-11172.3.patch
>
>
> create table testvec(id int, dt int, greg_dt string) stored as orc;
> insert into table testvec
> values
> (1,20150330, '2015-03-30'),
> (2,20150301, '2015-03-01'),
> (3,20150502, '2015-05-02'),
> (4,20150401, '2015-04-01'),
> (5,20150313, '2015-03-13'),
> (6,20150314, '2015-03-14'),
> (7,20150404, '2015-04-04');
> hive> select dt, greg_dt from testvec where id=5;
> OK
> 20150313 2015-03-13
> Time taken: 4.435 seconds, Fetched: 1 row(s)
> hive> set hive.vectorized.execution.enabled=true;
> hive> set hive.map.aggr;
> hive.map.aggr=true
> hive> select max(dt), max(greg_dt) from testvec where id=5;
> OK
> 20150313 2015-03-30
> hive> set hive.vectorized.execution.enabled=false;
> hive> select max(dt), max(greg_dt) from testvec where id=5;
> OK
> 20150313 2015-03-13
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