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Posted to issues@hive.apache.org by "Sergey Shelukhin (JIRA)" <ji...@apache.org> on 2016/01/19 02:10:39 UTC
[jira] [Comment Edited] (HIVE-12809) Vectorization: fast-path for
coalesce if input.noNulls = true
[ https://issues.apache.org/jira/browse/HIVE-12809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15106068#comment-15106068 ]
Sergey Shelukhin edited comment on HIVE-12809 at 1/19/16 1:10 AM:
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+1. The initial noNulls set for the common case is kind of a separate change from the first-column shortcut, right?
was (Author: sershe):
+1
> 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.
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