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https://issues.apache.org/jira/browse/HIVE-24041?focusedWorklogId=474674&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-474674
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ASF GitHub Bot logged work on HIVE-24041:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 26/Aug/20 05:47
Start Date: 26/Aug/20 05:47
Worklog Time Spent: 10m
Work Description: jcamachor merged pull request #1405:
URL: https://github.com/apache/hive/pull/1405
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Issue Time Tracking
-------------------
Worklog Id: (was: 474674)
Time Spent: 1h (was: 50m)
> Extend semijoin conversion rules
> --------------------------------
>
> Key: HIVE-24041
> URL: https://issues.apache.org/jira/browse/HIVE-24041
> Project: Hive
> Issue Type: Improvement
> Components: CBO
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h
> Remaining Estimate: 0h
>
> This patch fixes a couple of limitations that can be seen in
> {{cbo_query95.q}}, in particular:
> - It adds a rule to trigger semijoin conversion when the there is an
> aggregate on top of the join that prunes all columns from left side, and the
> aggregate operator is on the left input of the join.
> - It extends existing semijoin conversion rules to prune the unused columns
> from its left input, which leads to additional conversion opportunities.
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