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https://issues.apache.org/jira/browse/HIVE-20775?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16695251#comment-16695251
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Jesus Camacho Rodriguez commented on HIVE-20775:
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[~ashutoshc], I have separated this code from HIVE-20783, I have added more
comments as you mentioned in RB, and I have created HIVE-20957 as a follow-up.
> Factor cost of each SJ reduction when costing a follow-up reduction
> -------------------------------------------------------------------
>
> Key: HIVE-20775
> URL: https://issues.apache.org/jira/browse/HIVE-20775
> Project: Hive
> Issue Type: Bug
> Components: Physical Optimizer
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
> Attachments: HIVE-20775.01.patch, HIVE-20775.02.patch,
> HIVE-20775.03.patch, HIVE-20775.04.patch, HIVE-20775.05.patch,
> HIVE-20775.patch
>
>
> Currently, while costing the SJ in a plan, the stats of the a TS that is
> reduced by a SJ are not adjusted after we have decided to keep a SJ in the
> tree. Ideally, we could adjust the stats to take into account decisions that
> have already been made.
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