hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Matt McCline (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-7518) Output vectorized GROUP BY aggregate fields from STRUCTs for AVG as columns so downstream reduce can be vectorized
Date Sat, 26 Jul 2014 01:46:38 GMT

     [ https://issues.apache.org/jira/browse/HIVE-7518?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matt McCline updated HIVE-7518:
-------------------------------

    Summary: Output vectorized GROUP BY aggregate fields from STRUCTs for AVG as columns so
downstream reduce can be vectorized  (was: Output vectorized GROUP BY aggregate fields like
AVG as columns so downstream reduce can be vectorized)

> Output vectorized GROUP BY aggregate fields from STRUCTs for AVG as columns so downstream
reduce can be vectorized
> ------------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-7518
>                 URL: https://issues.apache.org/jira/browse/HIVE-7518
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Matt McCline
>            Assignee: Matt McCline
>
> Today, aggregates like AVG are output from VectorGroupByOperator as a STRUCT.  This prevents
downstream operators in map, reduce shuffle, and reduce from being vectorized.
> Take the STRUCT fields used for AVG (for example) and output them (vector) columns.
> NOTE: downstream VectorGroupByOperator needs to accept column form…
> •	That is, (reduce) merge of partial aggregates is different than map.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message