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https://issues.apache.org/jira/browse/HIVE-12305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14986144#comment-14986144
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Ashutosh Chauhan commented on HIVE-12305:
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Fix in this patch is a guard against failures, but knowing which expr is
constant in GBY's aggregation function arguments could be better done using
Metadata provider of Calcite. It will be good to add a #TODO in comment for
this.
+1 LGTM
> CBO: Calcite Operator To Hive Operator (Calcite Return Path): UDAF can not
> pull up constant expressions
> -------------------------------------------------------------------------------------------------------
>
> Key: HIVE-12305
> URL: https://issues.apache.org/jira/browse/HIVE-12305
> Project: Hive
> Issue Type: Sub-task
> Components: CBO
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Attachments: HIVE-12305.01.patch
>
>
> to repro, run annotate_stats_groupby.q with return path turned on.
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