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https://issues.apache.org/jira/browse/HIVE-5538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14087973#comment-14087973
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Ashutosh Chauhan commented on HIVE-5538:
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If I understand correctly, it seems concern is that vectorization is not tested
enough for it to be turned on by default. If so, one possibility is to turn it
on only for unit tests (ie in data/conf/hive-site.xml) and leave the value
still to be false in released product (by having false in HiveConf.java) This
will give us a way to test vectorization vigorously in our unit tests and than
turn it on in production only once we have sufficient confidence in its
stability. Sounds reasonable?
> Turn on vectorization by default.
> ---------------------------------
>
> Key: HIVE-5538
> URL: https://issues.apache.org/jira/browse/HIVE-5538
> Project: Hive
> Issue Type: Sub-task
> Reporter: Jitendra Nath Pandey
> Assignee: Hari Sankar Sivarama Subramaniyan
> Attachments: HIVE-5538.1.patch, HIVE-5538.2.patch, HIVE-5538.3.patch,
> HIVE-5538.4.patch, HIVE-5538.5.patch, HIVE-5538.5.patch, HIVE-5538.6.patch
>
>
> Vectorization should be turned on by default, so that users don't have to
> specifically enable vectorization.
> Vectorization code validates and ensures that a query falls back to row
> mode if it is not supported on vectorized code path.
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