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https://issues.apache.org/jira/browse/HIVE-16132?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Deepak Jaiswal reassigned HIVE-16132:
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> DataSize stats don't seem correct in semijoin opt branch
> --------------------------------------------------------
>
> Key: HIVE-16132
> URL: https://issues.apache.org/jira/browse/HIVE-16132
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2
> Reporter: Deepak Jaiswal
> Assignee: Deepak Jaiswal
>
> For the following operator tree snippet, the second Select is the start of a
> semijoin optimization branch. Take a look at the Data size - it is the same
> as the data size for its parent Select, even though the second select has
> only a single bigint column in its projection (the parent has 2 columns). I
> would expect the size to be 533328 (16 bytes * 33333).
> Fixing this estimate may become important if we need to estimate the cost of
> generating the min/max/bloomfilter.
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