[ 
https://issues.apache.org/jira/browse/HIVE-20265?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Vineet Garg reassigned HIVE-20265:
----------------------------------


> PTF operator has an extra reducer in CBO
> ----------------------------------------
>
>                 Key: HIVE-20265
>                 URL: https://issues.apache.org/jira/browse/HIVE-20265
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Planning
>            Reporter: Vineet Garg
>            Assignee: Vineet Garg
>            Priority: Major
>
> {code:sql}
> explain vectorization detail
> select p_mfgr, p_name, p_size, 
> min(p_retailprice),
> rank() over(distribute by p_mfgr sort by p_name)as r,
> dense_rank() over(distribute by p_mfgr sort by p_name) as dr,
> p_size, p_size - lag(p_size,1,p_size) over(distribute by p_mfgr sort by 
> p_name) as deltaSz
> from part
> group by p_mfgr, p_name, p_size
> {code}
> Above query generates extra reducer with CBO on.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

Reply via email to