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https://issues.apache.org/jira/browse/HIVE-10716?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14560457#comment-14560457
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Ashutosh Chauhan commented on HIVE-10716:
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[~gopalv] I need to verify, but my guess is
https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/Optimizer.java#L80
is coming in play here.
> Fold case/when udf for expression involving nulls in filter operator.
> ---------------------------------------------------------------------
>
> Key: HIVE-10716
> URL: https://issues.apache.org/jira/browse/HIVE-10716
> Project: Hive
> Issue Type: New Feature
> Components: Logical Optimizer
> Affects Versions: 1.2.0
> Reporter: Ashutosh Chauhan
> Assignee: Ashutosh Chauhan
> Fix For: 1.2.1
>
> Attachments: HIVE-10716.patch
>
>
> From HIVE-10636 comments, more folding is possible.
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