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https://issues.apache.org/jira/browse/HIVE-24203?focusedWorklogId=492970&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-492970
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ASF GitHub Bot logged work on HIVE-24203:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 30/Sep/20 13:51
Start Date: 30/Sep/20 13:51
Worklog Time Spent: 10m
Work Description: okumin commented on a change in pull request #1531:
URL: https://github.com/apache/hive/pull/1531#discussion_r497526561
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java
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@@ -2921,6 +2920,77 @@ public Object process(Node nd, Stack<Node> stack,
NodeProcessorCtx procCtx,
}
}
+ /**
+ * LateralViewJoinOperator joins the output of select with the output of
UDTF.
Review comment:
@zabetak Thanks for taking a look!
I added a description. Please feel free to ask me if something doesn't make
sense.
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Issue Time Tracking
-------------------
Worklog Id: (was: 492970)
Time Spent: 40m (was: 0.5h)
> Implement stats annotation rule for the LateralViewJoinOperator
> ---------------------------------------------------------------
>
> Key: HIVE-24203
> URL: https://issues.apache.org/jira/browse/HIVE-24203
> Project: Hive
> Issue Type: Improvement
> Components: Physical Optimizer
> Affects Versions: 4.0.0, 3.1.2, 2.3.7
> Reporter: okumin
> Assignee: okumin
> Priority: Major
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> StatsRulesProcFactory doesn't have any rules to handle a JOIN by LATERAL VIEW.
> This can cause an underestimation in case that UDTF in LATERAL VIEW generates
> multiple rows.
> HIVE-20262 has already added the rule for UDTF.
> This issue would add the rule for LateralViewJoinOperator.
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