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https://issues.apache.org/jira/browse/HIVE-18585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16346072#comment-16346072
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Jesus Camacho Rodriguez commented on HIVE-18585:
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+1
> Return type for udfs should be determined using Hive inference rules instead
> of Calcite
> ---------------------------------------------------------------------------------------
>
> Key: HIVE-18585
> URL: https://issues.apache.org/jira/browse/HIVE-18585
> Project: Hive
> Issue Type: Bug
> Components: Query Planning
> Reporter: Ashutosh Chauhan
> Assignee: Ashutosh Chauhan
> Priority: Major
> Attachments: HIVE-18585.1.patch, HIVE-18585.patch
>
>
> e.g., Calcite considers date and varchar incompatible types in case system,
> while Hive doesn't.
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