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https://issues.apache.org/jira/browse/HIVE-12309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14999461#comment-14999461
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Prasanth Jayachandran commented on HIVE-12309:
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+1
> TableScan should use column stats when available for better data size estimate
> ------------------------------------------------------------------------------
>
> Key: HIVE-12309
> URL: https://issues.apache.org/jira/browse/HIVE-12309
> Project: Hive
> Issue Type: Improvement
> Components: Statistics
> Reporter: Ashutosh Chauhan
> Assignee: Ashutosh Chauhan
> Attachments: HIVE-12309.2.patch, HIVE-12309.patch
>
>
> Currently, all other operators use column stats to figure out data size,
> whereas TableScan relies on rawDataSize. This inconsistency can result in an
> inconsistency where TS may have lower Datasize then subsequent operators.
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