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https://issues.apache.org/jira/browse/HIVE-13333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15229311#comment-15229311
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Ashutosh Chauhan commented on HIVE-13333:
-----------------------------------------
+1
> StatsOptimizer throws ClassCastException
> ----------------------------------------
>
> Key: HIVE-13333
> URL: https://issues.apache.org/jira/browse/HIVE-13333
> Project: Hive
> Issue Type: Bug
> Components: Logical Optimizer
> Affects Versions: 2.0.0
> Reporter: Ashutosh Chauhan
> Assignee: Pengcheng Xiong
> Attachments: HIVE-13333.01.patch, HIVE-13333.02.patch,
> HIVE-13333.03.patch
>
>
> mvn test -Dtest=TestCliDriver -Dtest.output.overwrite=true
> -Dqfile=cbo_rp_udf_udaf.q -Dhive.compute.query.using.stats=true repros the
> issue.
> In StatsOptimizer with return path on, we may have aggr($f0), aggr($f1) in GBY
> and then select aggr($f1), aggr($f0) in SEL.
> Thus we need to use colExp to find out which position is
> corresponding to which position.
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