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https://issues.apache.org/jira/browse/HIVE-17190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16105492#comment-16105492
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Ashutosh Chauhan commented on HIVE-17190:
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Yes, it will help with auto-gather column stats where we collect stats for
newly inserted data. We can update bit vectors for those scenarios to get a
better ndv estimate.
So, yes we shall store bitvectors for unpartitioned tables too. Currently, some
of upgrade scripts don't cover that. Will use this jira for that and change
description accordingly.
> Don't store bitvectors for unpartitioned table
> ----------------------------------------------
>
> Key: HIVE-17190
> URL: https://issues.apache.org/jira/browse/HIVE-17190
> Project: Hive
> Issue Type: Test
> Components: Metastore, Statistics
> Affects Versions: 3.0.0
> Reporter: Ashutosh Chauhan
> Assignee: Ashutosh Chauhan
> Attachments: HIVE-17190.patch
>
>
> Since current ones can't be intersected, there is no advantage of storing
> them for unpartitioned tables.
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