[
https://issues.apache.org/jira/browse/HIVE-12809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15106008#comment-15106008
]
Gopal V commented on HIVE-12809:
--------------------------------
[~mmccline]: can you take a look at this patch? This is aimed at keeping
noNulls=true if at least 1 column fed into a coalesce is a constant.
> Vectorization: fast-path for coalesce if input.noNulls = true
> -------------------------------------------------------------
>
> Key: HIVE-12809
> URL: https://issues.apache.org/jira/browse/HIVE-12809
> Project: Hive
> Issue Type: Bug
> Affects Versions: 2.0.0, 2.1.0
> Reporter: Gopal V
> Assignee: Gopal V
> Attachments: HIVE-12809.1.patch, HIVE-12809.2.patch
>
>
> Coalesce can skip processing other columns, if all the input columns are
> non-null.
> Possibly retaining, isRepeating=true.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
