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https://issues.apache.org/jira/browse/HIVE-24041?focusedWorklogId=474345&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-474345
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ASF GitHub Bot logged work on HIVE-24041:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 25/Aug/20 14:23
Start Date: 25/Aug/20 14:23
Worklog Time Spent: 10m
Work Description: jcamachor commented on a change in pull request #1405:
URL: https://github.com/apache/hive/pull/1405#discussion_r476489342
##########
File path: ql/src/test/queries/clientpositive/auto_sortmerge_join_10.q
##########
@@ -48,6 +48,8 @@ select count(*) from
(select a.key as key, a.value as value from tbl2_n4 a where key < 6) subq2
on subq1.key = subq2.key;
+set hive.auto.convert.sortmerge.join=false;
Review comment:
Yes, this will be tackled in follow-up by @maheshk114 , there is a
problem with execution of semijoin. I will reference the JIRA.
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Issue Time Tracking
-------------------
Worklog Id: (was: 474345)
Time Spent: 0.5h (was: 20m)
> 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: 0.5h
> 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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