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https://issues.apache.org/jira/browse/HIVE-6492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13947410#comment-13947410
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Selina Zhang commented on HIVE-6492:
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Thanks, Ashutosh! Yes, it just limits partition per table scan intentionally.
It based on the assumption that most of queries only involve one instance
table. And it is more like a supplement for strict mode.
> limit partition number involved in a table scan
> -----------------------------------------------
>
> Key: HIVE-6492
> URL: https://issues.apache.org/jira/browse/HIVE-6492
> Project: Hive
> Issue Type: New Feature
> Components: Query Processor
> Affects Versions: 0.12.0
> Reporter: Selina Zhang
> Assignee: Ashutosh Chauhan
> Fix For: 0.13.0
>
> Attachments: HIVE-6492.1.patch.txt, HIVE-6492.2.patch.txt,
> HIVE-6492.3.patch.txt, HIVE-6492.4.patch.txt, HIVE-6492.4.patch_suggestion,
> HIVE-6492.5.patch.txt, HIVE-6492.6.patch.txt, HIVE-6492.7.parch.txt
>
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> To protect the cluster, a new configure variable
> "hive.limit.query.max.table.partition" is added to hive configuration to
> limit the table partitions involved in a table scan.
> The default value will be set to -1 which means there is no limit by default.
> This variable will not affect "metadata only" query.
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