[jira] [Work started] (HIVE-16132) DataSize stats don't seem correct in semijoin opt branch

["Deepak Jaiswal (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-16132?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HIVE-16132 started by Deepak Jaiswal.
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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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