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https://issues.apache.org/jira/browse/HIVE-21316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16777020#comment-16777020
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Zoltan Haindrich commented on HIVE-21316:
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patch#1) fixes the issue by keeping the type correct during constant folding;
however it seems to be that the same issue is present when rel2ast translation
is being executed
> Comparision of varchar column and string literal should happen in varchar
> -------------------------------------------------------------------------
>
> Key: HIVE-21316
> URL: https://issues.apache.org/jira/browse/HIVE-21316
> Project: Hive
> Issue Type: Improvement
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Attachments: HIVE-21316.01.patch
>
>
> this is most probably the root cause behind HIVE-21310 as well
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