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https://issues.apache.org/jira/browse/HIVE-4150?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13600507#comment-13600507
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Gang Tim Liu commented on HIVE-4150:
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Instead of scanning partition's data, we can read stats from metastore directly
if it is available.
No. of row.
> optimize queries like 'select count(1) from T where <conditions on partition
> columns>'
> --------------------------------------------------------------------------------------
>
> Key: HIVE-4150
> URL: https://issues.apache.org/jira/browse/HIVE-4150
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: Gang Tim Liu
>
> If accurate stats are available in the metastore, they should be used to
> optimize the above query.
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